Updated on 2025/12/26

写真a

 
nakanishi wataru
 
Organization
School of Environment and Society Specially Appointed Associate Professor
Title
Specially Appointed Associate Professor
Homepage
https://sites.google.com/site/nakanishiwataru/
External link

Degree

  • Dr. Eng. ( 2014.3   The University of Tokyo )

Education

  • The University of Tokyo   The Graduate School of Engineering   Department of Civil Engineering

    2011.4 - 2014.3

    　 More details

  • The University of Tokyo   The Graduate School of Engineering   Department of Civil Engineering

    2009.4 - 2011.3

    　 More details

  • The University of Tokyo   The Faculty of Engineering   Department of Civil Engineering

    2007.4 - 2009.3

    　 More details

  • The University of Tokyo   College of Arts and Sciences

    2005.4 - 2007.3

    　 More details

Research History

  • 広島大学 特任准教授

    2025.7

    　 More details

  • 東京科学大学 特任准教授

    2025.7

    　 More details

  • 金沢大学 准教授

    2021.10 - 2025.6

    　 More details

  • 東京工業大学 助教

    2019.3 - 2021.9

    　 More details

  • 東京工業大学 特任助教

    2016.10 - 2019.2

    　 More details

  • 東京大学 助教

    2014.4 - 2016.9

    　 More details

  • 日本学術振興会 特別研究員 (DC2)

    2013.4 - 2014.3

    　 More details

▼display all

Papers

  • Traffic count data analysis using mixtures of Kato–Jones distributions

    Kota Nagasaki, Shogo Kato, Wataru Nakanishi, M C Jones

    Journal of the Royal Statistical Society Series C: Applied Statistics   2024.10

    　More details

    Publishing type：Research paper (scientific journal)   Publisher：Oxford University Press (OUP)  

    Abstract

    We discuss the modelling of traffic count data that show the variation of traffic volume within a day. For the modelling, we apply mixtures of Kato–Jones distributions in which each component is unimodal and affords a wide range of skewness and kurtosis. We consider two methods for parameter estimation, namely, a modified method of moments and the maximum-likelihood method. These methods were seen to be useful for fitting the proposed mixtures to our data. As a result, the variation in traffic volume was classified into the morning and evening traffic whose distributions have different shapes, particularly different degrees of skewness and kurtosis.

    DOI： 10.1093/jrsssc/qlae057

    researchmap

  • コネクティッドカーデータとスパースモデリングに基づく区間別流率密度関係の推定 Reviewed

    小田 紘生, 瀬尾 亨, 中西 航

    交通工学論文集   10 ( 1 )   A_316 - A_323   2024.2

    　More details

  • Trajectory Data-Driven Network Representation for Traffic State Prediction using Deep Learning Reviewed

    Yasuda, S, Katayama, H, Nakanishi, W, Iryo, T

    2024.2

    　More details

  • 連続走行軌跡を用いた車線変更挙動の時系列クラスタリング Reviewed

    打越天真, 中西航

    交通工学論文集   10 ( 1 )   A_173 - A_182   2024.2

    　More details

  • Time Series Clustering of Lane Change Behavior by Using Complete Vehicle Trajectories Reviewed

    UCHIKOSHI Temma, NAKANISHI Wataru

    Proceedings of the Conference of Japan Society of Traffic Engineers   43   587 - 594   2023

    　More details

    Language：Japanese   Publisher：Japan Society of Traffic Engineers  

    DOI： 10.14954/jsteproceeding.43.0_587

    CiNii Research

    researchmap

  • Estimation of Location-Dependent Fundamental Diagram based on Connected Vehicle Data and Sparse Modeling Reviewed

    ODA Koki, SEO Toru, NAKANISHI Wataru

    Proceedings of the Conference of Japan Society of Traffic Engineers   43   513 - 520   2023

    　More details

    Language：Japanese   Publisher：Japan Society of Traffic Engineers  

    DOI： 10.14954/jsteproceeding.43.0_513

    CiNii Research

    researchmap

  • ANALYSIS OF TRAFFIC VOLUME BY THE ESTIMATED PARAMETER OF THE MIXTURE OF CIRCULAR DISTRIBUTION Reviewed

    Kota NAGASAKI, Wataru NAKANISHI, Yasuo ASAKURA

    Journal of Japan Society of Civil Engineers, Ser. D3 (Infrastructure Planning and Management)   78 ( 5 )   I_825 - I_831   2023

    　More details

    Publishing type：Research paper (scientific journal)   Publisher：Japan Society of Civil Engineers  

    DOI： 10.2208/jscejipm.78.5_i_825

    researchmap

  • Estimating freight production/attraction using nighttime satellite imagery Reviewed

    Tomoya Kawasaki, Wataru Nakanishi, Satoshi Hyodo, Yusaku Namba, Hirokazu Mori, Hirotoshi Kishi

    Communications in Transportation Research   2   2022.12

    　More details

    Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.commtr.2022.100067

    Scopus

    researchmap

  • 車両軌跡データのみを用いた主要交差点抽出—Extraction of Major Intersections by Only Vehicle Trajectory Data Reviewed

    鐘 恒毅, 中西 航, 安田 昌平, 井料 隆雅

    GIS-理論と応用 / 地理情報システム学会 編   30 ( 2 )   91 - 102   2022.12

    　More details

  • An Operation Problem of On-demand Responsive Vehicles with Elevator Calls Reviewed

    NAGAI Kazuki, NAKANISHI Wataru, ASAKURA Yasuo

    JSTE Journal of Traffic Engineering   8 ( 1 )   1 - 10   2022.1

    　More details

    Language：Japanese   Publisher：Japan Society of Traffic Engineers  

    In this paper, Horizontal Elevator, HE, is proposed as a transportation system for autonomous vehicles which satisfies the following two conditions: passengers do not need to reserve in advance to utilize it and vehicles operate only on a designated network. HE has a single vehicle moving on a line represented as a one-dimensional network. An optimization problem is defined to obtain an operation plan for the HE. Selective Collective (SC), one of the heuristics for the elevator operation problems, is applied for solving the problem. Simulation experiments of the HE under some conditions were conducted and followings were revealed. First, SC is found as a good solution method regarding calculation speed, optimality and ease for passengers to understand how to utilize HEs. Second, HEs are expected to be applied to the network with multiple lines where passengers can transfer mutually.

    DOI： 10.14954/jste.8.1_1

    CiNii Books

    CiNii Research

    researchmap

  • Analysis of the single-regime speed-density fundamental relationships for varying spatiotemporal resolution using Zen Traffic Data Reviewed

    Garima Dahiya, Yasuo Asakura, Wataru Nakanishi

    Asian Transport Studies   8   100066 - 100066   2022

    　More details

    Publishing type：Research paper (scientific journal)   Publisher：Elsevier {BV}  

    DOI： 10.1016/j.eastsj.2022.100066

    Scopus

    researchmap

  • BAYESIAN ESTIMATION OF A LAND USE MODEL Reviewed

    KOBAYASHI Shusuke, NAKANISHI Wataru, HORIKOSHI Hikari, TAKAYAMA Yuki

    Journal of Japan Society of Civil Engineers, Ser. D3 (Infrastructure Planning and Management)   77 ( 5 )   I_469 - I_481   2022

    　More details

    Language：Japanese   Publisher：Japan Society of Civil Engineers  

    Typically, the parameters of land use models are stepwisely estimated and calibrated because of some practical difficulties, e.g., satisfying sign conditions. However, this estimation method lacks the reliability from the theoretical viewpoint as the parameters that should be estimated simultaneously are separately estimated one by one. This study is the first attempt to mitigate this problem. We aim to introduce a Bayesian approach into the estimation of land use models. Specifically, we conduct a whole procedure of an econometric analysis using land use models; for a given land use model, we simultaneously estimate their parameters including the variable selection, confirm the reproducibility of the data, and conduct the counterfactual experiment. Both the estimation result and its comparison with the result by the conventional method suggested the superiority of Bayesian approach as well as its potential for expansion.

    DOI： 10.2208/jscejipm.77.5_i_469

    CiNii Research

    researchmap

  • Vision-based crowd dynamic model for multi-directional pedestrian flow at public space: a hybrid approach Reviewed

    ZHOU, Zixuan, NAKANISHI, Wataru, ASAKURA, Yasuo

    Journal of the Eastern Asia Society for Transportation Studies   14   2524 - 2536   2022

    　More details

  • SPARSE MODELLING FOR LOCATION DEPENDENT FUNDAMENTAL DIAGRAM WITH COMPLETE VEHICLE TRAJECTORY DATASET Reviewed

    NAKANISHI Wataru

    Journal of Japan Society of Civil Engineers, Ser. D3 (Infrastructure Planning and Management)   78 ( 1 )   24 - 33   2022

    　More details

    Language：Japanese   Publisher：Japan Society of Civil Engineers  

    The Fundamental Diagram (FD) plays an important role in the performance evaluation of road networks. As FDs are in principal different among locations, it is desirable to estimate FDs at arbitrary locations based on actual data. Given a complete vehicle trajectory dataset, we propose a method to estimate each FD at each location. For this purpose, it is necessary to identify the sections that follow the different FDs each other. Using sparse modeling, we formulate a model that can simultaneously perform section identification and FD estimation. This enables us to determine a statistically and/or practically suitable number of sections without requiring a priori knowledge of road performance. The proposed method is applied to the actual data on the Hanshin Expressway and the validity of the estimation results is demonstrated.

    DOI： 10.2208/jscejipm.78.1_24

    CiNii Research

    J-GLOBAL

    researchmap

  • Data-driven framework for the adaptive exit selection problem in pedestrian flow: Visual information based heuristics approach Reviewed

    Zi-Xuan Zhou, Wataru Nakanishi, Yasuo Asakura

    Physica A: Statistical Mechanics and its Applications   583   126289 - 126289   2021.12

    　More details

    Publishing type：Research paper (scientific journal)   Publisher：Elsevier {BV}  

    DOI： 10.1016/j.physa.2021.126289

    Scopus

    researchmap

  • Empirical analysis on long-distance peer-to-peer ridesharing service in Japan Reviewed

    Wataru Nakanishi, Yuki Yamashita, Yasuo Asakura

    International Journal of Sustainable Transportation   15 ( 8 )   1 - 6   2021.6

    　More details

    Publishing type：Research paper (scientific journal)   Publisher：Informa {UK} Limited  

    DOI： 10.1080/15568318.2020.1785595

    Scopus

    researchmap

  • Route choice in the pedestrian evacuation: Microscopic formulation based on visual information Reviewed

    Zi Xuan Zhou, Wataru Nakanishi, Yasuo Asakura

    Physica A: Statistical Mechanics and its Applications   562   2021.1

    　More details

    Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.physa.2020.125313

    Scopus

    researchmap

  • ANALYSIS OF CAR-FOLLOWING BEHAVIOR IN DIFFERENT TIME ZONES BY ESTIMATING THE PARAMETERS OF NEWELL'S MODEL Reviewed

    YOSHIDA Kotaro, NAKANISHI Wataru, ASAKURA Yasuo

    Journal of Japan Society of Civil Engineers, Ser. D3 (Infrastructure Planning and Management)   76 ( 5 )   I_1253 - I_1261   2021

    　More details

    Language：Japanese   Publisher：Japan Society of Civil Engineers  

    In metropolitan expressways, there is a lot of variation in road alignment and driver's personal attributes, so it is important to analyze car-following behavior in different conditions around road. Various studies have been done in the past that discuss the variation in car-behavior under various conditions, however, no studies have been conducted that focus on the variation in car-following behavior in different time zones. In this study, we analyzed car-following behavior in different time zones by estimating the parameters of Newell's car-following model from Zen-Traffic Data that includes all vehicles' trajectory information in different time zones. As a conclusion, we found that the trend of car-following behavior varies in different time zones.

    DOI： 10.2208/jscejipm.76.5_i_1253

    CiNii Research

    J-GLOBAL

    researchmap

  • AN ANALYSIS ON TOURIST EXCURSION PATTERN IN KYOTO CITY USING GNSS DATA FROM SMARTPHONE APP Reviewed

    YAMAKI Soichiro, NAKANISHI Wataru, SUGIURA Satoshi

    Journal of Japan Society of Civil Engineers, Ser. D3 (Infrastructure Planning and Management)   76 ( 5 )   I_679 - I_688   2021

    　More details

    Language：Japanese   Publisher：Japan Society of Civil Engineers  

    Kyoto city, one of the most popular tourist destinations in Japan, has a problem of congestion. To grasp tourists’ excursion behavior is necessary to take effective measures. However, traditional ways such as questionnaire survey have some limitations in terms of period, costs, etc. Recently, a lot of smartphone Apps using geographic location were launched. Some developers have accumulated the location data from them. In this research, we analyzed the GNSS trajectory data accumulated in transfer guide App and found where tourists had visited and the order of the visits during the excursion in Kyoto city. We distinguished location records of ‘stop’ and ‘just moving’, by setting threshold on the spatio-temporal interval of records.

    DOI： 10.2208/jscejipm.76.5_i_679

    CiNii Research

    J-GLOBAL

    researchmap

  • A study of speed-density functional relations for varying spatiotemporal resolution using Zen Traffic Data

    Garima Dahiyal, Yasuo Asakura, Wataru Nakanishi

    2020 IEEE 23rd International Conference on Intelligent Transportation Systems, ITSC 2020   2020.9

    　More details

    Publishing type：Research paper (international conference proceedings)  

    DOI： 10.1109/ITSC45102.2020.9294564

    Scopus

    researchmap

  • Classification of Road Networks around Station by Rose Diagrams and Circular Distributions Reviewed

    NAGASAKI Kota, NAKANISHI Wataru, ASAKURA Yasuo

    JSTE Journal of Traffic Engineering   6 ( 2 )   A_1 - A_8   2020.2

    　More details

    Language：Japanese   Publisher：Japan Society of Traffic Engineers  

    A road network around a railway station may affect the convenience of the station. However, only few researches have evaluated or classified a road network around a specific facility with referring to tangible factors of a road network such as length or orientation of each road link. In this paper, we propose a new evaluation method of a road network by using directional statistics. At first, we draw a rose diagram focusing on orientation of road link around a station. Next, we estimate parameters of circular distribution of the orientation and evaluate characteristics of the network by using the parameter values. The proposed model is applied to the road networks around all 21 stations on Tokyu Toyoko line. In comparison with the past studies, this method represents how the link orientations concentrate to specific directions. In addition, it becomes possible to classify road networks into several categories with similar parameter values.

    DOI： 10.14954/jste.6.2_a_1

    CiNii Books

    CiNii Research

    J-GLOBAL

    researchmap

  • Understanding and Visualisation of Geographic Mesh Similarity by Trajectory Data and Gaussian Process Modelling Reviewed

    Wataru Nakanishi

    International Journal of Intelligent Transportation Systems Research   18 ( 1 )   35 - 42   2020.1

    　More details

    Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media {LLC}  

    DOI： 10.1007/s13177-018-0171-9

    Scopus

    researchmap

  • Empirical analysis on long-distance peer-to-peer ridesharing service in Japan

    Yuki Yamashita, Wataru Nakanishi, Yasuo Asakura

    Transportation Research Procedia   47   340 - 345   2020

    　More details

    Publishing type：Research paper (international conference proceedings)  

    DOI： 10.1016/j.trpro.2020.03.107

    Scopus

    researchmap

  • ANALYSING ROAD NETWORKS BY USING DIRECTIONAL STATISTICS Reviewed

    NAGASAKI Kota, NAKANISHI Wataru, ASAKURA Yasuo

    Journal of Japan Society of Civil Engineers, Ser. D3 (Infrastructure Planning and Management)   75 ( 6 )   I_199 - I_205   2020

    　More details

    Language：Japanese   Publisher：Japan Society of Civil Engineers  

    Many researchers have analysed road networks by considering their components such as node, link and connection. On the other hand, only few researches refer to tangible factors of road network such as length and orientation of each road. In this paper, we propose the new evaluation method of road network by using directional statistics. At first, we draw the graph of orientation of each road around a station. Next, we develop the method to estimate parameters of probability density function of the orientation. Then, we employ the clustering method on this estimated parameters to classify road networks around stations. Finally, we showed the applicability of the proposed method by applying them to over 1,500 stations in Tokyo Metropolitan Area.

    DOI： 10.2208/jscejipm.75.6_i_199

    CiNii Research

    J-GLOBAL

    researchmap

  • Application of the ROSE diagram to road network analysis

    Kota Nagasaki, Wataru Nakanishi, Yasuo Asakura

    Proceedings of the 24th International Conference of Hong Kong Society for Transportation Studies, HKSTS 2019: Transport and Smart Cities   169 - 176   2019

    　More details

    Publishing type：Research paper (international conference proceedings)  

    Scopus

    researchmap

  • Classification of Road Networks around Station by Rose Diagrams and Circular Distributions

    39   469 - 474   2019

    　More details

  • Integrating Sustainability in Supply Chain Network Design Reviewed

    Maharjan, R, Asakura, Y, Nakanishi, W, Wang, J

    Journal of the Eastern Asia Society for Transportation Studies   13   975 - 992   2019

    　More details

  • Feature Extraction of Inter-Region Travel Pattern Using Random Matrix Theory and Mobile Phone Location Data

    Wataru Nakanishi, Hiromichi Yamaguchi, Daisuke Fukuda

    Transportation Research Procedia   34   115 - 122   2018

    　More details

    Publishing type：Research paper (international conference proceedings)  

    DOI： 10.1016/j.trpro.2018.11.022

    Scopus

    researchmap

  • UNDERSTANDING TRAVEL PATTERN OF TOURISTS FROM Wi-Fi PROBE REQUESTS: A CASE STUDY IN MOTOBU PENINSULA, OKINAWA Reviewed

    中西航, 小林巴奈, 都留崇弘, 松本拓朗, 田中謙大, 菅芳樹, 神谷大介, 福田大輔

    土木学会論文集 D3(土木計画学)(Web)   74 ( 5 )   2018

    　More details

  • Tracking Data to Extract Changes in Football Game Situation Reviewed

    神谷, 啓太, 中西, 航, 泉, 裕一朗

    統計数理 = Proceedings of the Institute of Statistical Mathematics   65 ( 2 )   287 - 298   2017.12

    　More details

    Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：統計数理研究所  

    要旨ありスポーツ統計科学の新たな挑戦研究ノート

    CiNii Books

    CiNii Research

    J-GLOBAL

    researchmap

    Other Link： http://id.ndl.go.jp/bib/028844518

  • Spatial fluctuation on speed-density relationship of pedestrian dynamics Reviewed

    Wataru Nakanishi, Yoshiaki Fukutomi, Takashi Fuse

    Journal of Statistical Mechanics: Theory and Experiment   2017 ( 3 )   2017.3

    　More details

    Publishing type：Research paper (scientific journal)  

    DOI： 10.1088/1742-5468/aa60cf

    Scopus

    researchmap

  • RECENT ADVANCES IN KINEMATIC WAVE THEORY OF TRAFFIC FLOWS: VARIATIONAL FORMULATION AND NETWORK EXTENSION Reviewed

    WADA Kentaro, SEO Toru, NAKANISHI Wataru, SATSUKAWA Koki, YANAGIHARA Masami

    Journal of Japan Society of Civil Engineers, Ser. D3 (Infrastructure Planning and Management)   73 ( 5 )   I_1139 - I_1158   2017

    　More details

    Language：Japanese   Publisher：Japan Society of Civil Engineers  

    This paper summarizes recent advances in the kinematic wave (KW) theory of traffic flows. First, we review the variational formulation of kinematic waves and its application together with pointing out the limitations of its conventional analysis methods. Second, the KW theories for the network traffic are introduced. Specifically, we review and summarize the methods/conditions to determine boundary flows of links at multi-lane roads and intersections.

    DOI： 10.2208/jscejipm.73.i_1139

    CiNii Research

    J-GLOBAL

    researchmap

    Other Link： https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-16K18163/

  • MAP MATCHING METHOD WITH CONSIDERATION OF ERROR IN NETWORK COORDINATES Reviewed

    NAKANISHI Wataru, FUSE Takashi

    Journal of Japan Society of Civil Engineers, Ser. D3 (Infrastructure Planning and Management)   73 ( 5 )   I_549 - I_557   2017

    　More details

    Language：Japanese   Publisher：Japan Society of Civil Engineers  

    Estimation of pedestrian behavior in high-resolution is expected to advance the facility placement along the street. Generally, when capturing the walking trajectory as high resolution, it does not exist directly above the road network. However, the conventional map matching method, in which measurement coor- dinates are matched onto the network, has a problem from this viewpoint. Therefore, in this research, we propose a method to explicitly consider errors of network on continuous space. We sequentially estimate the deviation of the walking trajectory from the network as a latent variable by the GNSS measurement, taking the positioning error into account at the same time. From the measurement with error, we for- mulated a trajectory estimation which can describe the movement on the network and does not limit the actual position on the network. We showed the usefulness of the proposed method through application to simulation data in multiple settings.

    DOI： 10.2208/jscejipm.73.i_549

    CiNii Research

    J-GLOBAL

    researchmap

    Other Link： https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-15K18131/

  • Estimation of Paratransit Passenger Boarding/Alighting Locations Using Wi-Fi based Monitoring: Results of Field Testing in Krabi City Reviewed

    Fukuda, D, Kobayashi, H, Nakanishi, W, Suga, Y, Sriroongvikrai, K, Choocharukul, K

    Journal of the Eastern Asia Society for Transportation Studies   12   2151 - 2169   2017

    　More details

  • Modeling Spatial Dependence on Pedestrian Fundamental Diagram by Harmonic Spatial Filtering Reviewed

    NAKANISHI Wataru, FUKUTOMI Yoshiaki, FUSE Takashi

    JSTE Journal of Traffic Engineering   3 ( 4 )   A_1 - A_6   2017

    　More details

    Language：Japanese   Publisher：Japan Society of Traffic Engineers  

    In this study, we propose a method of modeling spatial dependence on pedestrian fundamental diagrams. A fundamental relationship between density and speed of pedestrian flow is useful with regard to evaluating the level of service in pedestrian facilities. However, this relationship always depends on the position although there is typically a lack of a priori knowledge regarding the position of bottlenecks, i.e., the position to be evaluated. Therefore, we propose an approach to use data obtained at entire area in a facility. We assume that the difference of fundamental diagrams at any position in a facility could be regarded as a fluctuation. This fluctuation over positions is modeled as a spatial dependence structure. The harmonic spatial filtering approach is employed to estimate the fundamental diagram and spatial fluctuation pattern simultaneously. We show that the regression accuracy of the proposed method is better than that of a non-spatial model. Furthermore, we interpret the estimated spatial fluctuation pattern over the entire experimental area, which might be useful in facility design.

    DOI： 10.14954/jste.3.4_a_1

    CiNii Books

    CiNii Research

    J-GLOBAL

    researchmap

  • Multi- Target detection from full-waveform airborne laser scanner using phd filter

    T. Fuse, D. Hiramatsu, W. Nakanishi

    International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences - ISPRS Archives   41   647 - 652   2016

    　More details

    Publishing type：Research paper (international conference proceedings)  

    DOI： 10.5194/isprsarchives-XLI-B5-647-2016

    Scopus

    researchmap

  • A PROPOSAL FOR LAND PRICE INFORMATION SERVICE BASED ON COMPARISON BETWEEN APPRAISED PRICES AND TRANSACTION PRICES Reviewed

    INOUE Ryo, SUGIURA Ayako, YONEYAMA Shigeaki, NAKANISHI Wataru

    Journal of Japan Society of Civil Engineers, Ser. D3 (Infrastructure Planning and Management)   72 ( 1 )   1 - 13   2016

    　More details

    Language：Japanese   Publisher：Japan Society of Civil Engineers  

    In Japan, the disclosure of in-depth land price data is increasingly considered to be critical to establishing transparent and fair land markets. The land market value publication by the Land Appraisal Committee, under the Ministry of Land, Infrastructure, Transport and Tourism, and prefectural governments (chika-koji and chika-chosa in Japanese) have played a major role in land pricing, and since 2005, publicly accessible real estate transaction prices have also been integral components of land pricing. However, these datasets alone do not provide adequate information to all market participants. The appraised prices often differ from actual transaction prices, and important transactional information such as the precise location, time, and attributes of properties are restricted due to privacy constraints. Further, appraised prices are not easily comparable with actual transaction prices due to dissimilar distribution points.<br> In this paper, we propose the publication of land price information by interpolating appraised prices for every transaction location using kriging, and comparing them to actual transaction prices; subsequently, we draw a map that allows us to easily understand trends in land prices. In addition, we develop an experimental online database that allows for easily searchable interpolated appraised land prices, accompanied by land price history and local market conditions.

    DOI： 10.2208/jscejipm.72.1

    CiNii Research

    J-GLOBAL

    researchmap

  • ADAPTIVE ESTIMATION OF POSITIONING ACCURACY BY GNSS FOR ANALYSIS OF PEDESTRIAN MOVEMENT ON NETWORK Reviewed

    NAKANISHI Wataru, FUSE Takashi

    Journal of Japan Society of Civil Engineers, Ser. D3 (Infrastructure Planning and Management)   72 ( 5 )   I_673 - I_681   2016

    　More details

    Language：Japanese   Publisher：Japan Society of Civil Engineers  

    In this study, we apply the adaptive parameter estimation method to the positioning calculation of pedestrians on network by navigation satellite systems. Like the formulation of DDR which was proposed by Bierlaire and Frejinger, we formulate the positioning accuracy as the stochastic model and introduce into the observation model of general state space model. Then we estimate the positioning accuracy using sequential Bayesian filtering. The advantages of this estimation are follows. Firstly, we don't have to assume the positioning accuracy in advance of the estimation; it is enough to employ a uniform distribution as a prior. Secondly, we can estimate simultaneously the positioning accuracy and the velocity and route choice of the pedestrian. This feature is valuable especially when we deal with the pedestrian behaviour which includes the rambling or sudden change of speed and direction. We applied the proposed method to simulation data and confirmed the estimated results, and showed the improvement in estimation accuracy compared to the conventional method. At last we apply the method to the real data.

    DOI： 10.2208/jscejipm.72.i_673

    CiNii Research

    J-GLOBAL

    researchmap

    Other Link： https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-15K18131/

  • ADAPTIVE PARAMETER ESTIMATION OF PERSON RECOGNITION MODEL IN A STOCHASTIC HUMAN TRACKING PROCESS

    W. Nakanishi, T. Fuse, T. Ishikawa

    International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences - ISPRS Archives   40 ( 4W5 )   49 - 53   2015.5

    　More details

    Publishing type：Research paper (international conference proceedings)  

    DOI： 10.5194/isprsarchives-XL-4-W5-49-2015

    Scopus

    researchmap

  • APPLICATION OF GENERAL STATE SPACE MODEL TO PARAMETER ESTIMATION OF PEDESTRIAN BEHAVIOR MODEL Reviewed

    NAKANISHI Wataru, TAKAHASHI Mami, FUSE Takashi

    Journal of Japan Society of Civil Engineers, Ser. D3 (Infrastructure Planning and Management)   71 ( 5 )   I_559 - I_566   2015

    　More details

    Language：Japanese   Publisher：Japan Society of Civil Engineers  

    This paper shows a new approach to estimate parameters of pedestrian behavior model. The approach applies general state space model. In this modelling, parameter estimation is formulated as a sequential Bayesian filtering. Thus we can estimate time varying parameters which are adaptive to sequentially acquired data. Also we can deal with observation errors. Firstly we include parameters into state vectors of a general state space model and formulate an estimation equation. Secondly we define components of that model: state vector, observation vector, system model, observation model and initial distributions. Then we apply this settings to data acquired at a railway station and estimate time varying parameters. We compared estimation results with estimation settings; we discuss effects of initial distributions, variance of random walk parameters and observation accuracies. In addition, we compared estimated parameters with real situations and confirm that parameters are adaptively changed to congestions.

    DOI： 10.2208/jscejipm.71.i_559

    DOI： 10.2208/jscejipm.77.3_207_references_DOI_aPLFRCY9RWxbO1eKC2kddWhB46G

    CiNii Research

    J-GLOBAL

    researchmap

    Other Link： https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-15K18131/

  • A Preliminary Study on Analysis of Pedestrian Traffic Line Using Angular Data Reviewed

    NAKANISHI Wataru, FUSE Takashi

    JSTE Journal of Traffic Engineering   1 ( 4 )   A_18 - A_23   2015

    　More details

    Language：Japanese   Publisher：Japan Society of Traffic Engineers  

    It is important to analyse pedestrian traffic line with regard to planning and evaluating walking spaces. In this paper, we focus on angular data and discuss a method to analyse pedestrian traffic line. We regard traffic line as data consisted of pedestrian’s position and angle: direction of movement at each time. Basic analysis shows that many pedestrians draw a similar trajectory around a ticket gate at a station; direction of movement is mostly determined by a relative position to the ticket gate. This fact means that a position of pedestrian can explain an angle at that position. Therefore we try to model this relation, using a method developed in directional statistics. In case of a simple dataset we successfully estimated a regression model of angle, which satisfied the property of angular data such as cyclicity. At last we considered some applications of the estimated model, taking an anomaly detection and an angle-choice model for example.

    DOI： 10.14954/jste.1.4_a_18

    CiNii Research

    J-GLOBAL

    researchmap

  • Sensitive analysis of observation model for human tracking using a stochastic process

    W. Nakanishi, T. Fuse

    International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences - ISPRS Archives   40 ( 5 )   445 - 450   2014

    　More details

    Publishing type：Research paper (international conference proceedings)  

    DOI： 10.5194/isprsarchives-XL-5-445-2014

    Scopus

    researchmap

  • Human Detection Using Posterior Probability for Stochastic Human Tracking System Reviewed

    NAKANISHI Wataru, FUSE Takashi

    Journal of the Japan society of photogrammetry and remote sensing   52 ( 5 )   255 - 265   2013

    　More details

    Language：English   Publisher：Japan Society of Photogrammetry and Remote Sensing  

    Recently sequential and stochastic human tracking method becomes popular in order to apply to complex situations that people are close to each other or are occluded by others. This paper proposes a human detection method for such tracking method, dealing with an appearance of human in observation area. We regard this human detection as an initial setting for stochastic tracking system. Firstly we detect human candidates and set initial distribution. Secondly we develop observation model using range and color information from sensors and calculate a posterior probability distribution. Thirdly we calculate expected value of human position and delete false positives, and then combine with tracking process. At last we apply the proposed method to the data acquired at the ticket gate of the railway station and show that the detection is succeeded under complex situations.

    DOI： 10.4287/jsprs.52.255

    DOI： 10.11499/sicejl.52.348

    CiNii Books

    CiNii Research

    J-GLOBAL

    researchmap

  • Stochastic process modeling for multiple human tracking using stereo video camera

    Takashi Fuse, Wataru Nakanishi

    Proceedings of SPIE - The International Society for Optical Engineering   8791   2013

    　More details

    Publishing type：Research paper (international conference proceedings)  

    DOI： 10.1117/12.2020425

    Scopus

    researchmap

  • Multiple human tracking in complex situation by data assimilation with pedestrian behavior model

    W. Nakanishi, T. Fuse

    International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences - ISPRS Archives   39   409 - 414   2012

    　More details

    Publishing type：Research paper (international conference proceedings)  

    Scopus

    researchmap

  • DEVELOPMENT OF REGIONAL TRANSPORTATION SYSTEM: CASE STUDY IN KOCHI PREFECTURE, JAPAN Reviewed

    KATO Hironori, SHIMA Norihisa, NAKAGAWA Yoshinori, NAKANISHI Wataru

    SOCIOTECHNICA   9   70 - 85   2012

    　More details

    Language：Japanese   Publisher：Sociotechnology Research Network  

    This paper reviews the history of regional transportation system in Kochi Prefecture, Japan. The history of regional network development is categorized into the four periods: before Edo-era, Edo-era, Meiji-era to the World War II (WW II), and after the WW II. The results show Kochi has suffered from poor road accessibility because it is landlocked whereas it has developed maritime network mainly connecting Kansai Region. As it has been located far from any political centers in the past, the unique culture has been developed in Kochi. This has made the local authorizes introduce the conservative transportation policy which prevents the local people from regional travels. They also show the religious-purpose travelers contributed to the technology transfer from other regions to Kochi.

    DOI： 10.3392/sociotechnica.9.70

    CiNii Research

    J-GLOBAL

    researchmap

  • A STUDY ON MULTIPLE HUMAN TRACKING BY INTEGRATING PEDESTRIAN BEHAVIOR MODEL Reviewed

    布施孝志, 中西航

    Journal of Japan Society of Civil Engineers, Ser. D3 (Infrastructure Planning and Management)   68 ( 2 )   92 - 104   2012

    　More details

    Language：Japanese   Publisher：Japan Society of Civil Engineers  

    Recently in-depth understanding of pedestrian behavior in public space is becoming significant with regard to achieving more sophisticated space design and flow control. Although there is a need to acquire automatically such behavior information, automatic human tracking is difficult under the situations that people move close to each other or are occluded by others. In this paper, we propose a new method of multiple human tracking under the complex situations. We review related works on both human tracking method by image processing and simulation model of pedestrian behavior, respectively. According to the review, we develop a method as a stochastic process, integrating them on the framework of general state space model. We apply the proposed method to the data acquired at the ticket gate of the railway station and confirm the high performance of the method. We also demonstrate the ability to acquire the OD data from the tracking result and show the future possibility.

    DOI： 10.2208/jscejipm.68.92

    CiNii Research

    J-GLOBAL

    researchmap

  • HISTORY OF REGIONAL TRANSPORTATION SYSTEM AND ITS IMPACT ON LOCAL SOCIETY: CASE STUDY IN YAMANASHI PREFECTURE: 山梨県を事例に Reviewed

    KATO Hironori, SHIMA Norihisa, NAKANISHI Wataru

    SOCIOTECHNICA   8   11 - 28   2011

    　More details

    Publisher：Sociotechnology Research Network  

    This paper reviews the history of regional transportation system and analyzes its impact on local society in Yamanashi Prefecture, Japan. The history of regional network development is categorized into the three periods: before Meiji-era, Meiji-era to the World War II (WW II), and after the WW II. Yamanashi has suffered from poor accessibility because it is landlocked. However, a number of access roads have been developed since ancient times whereas the river transportation was also established in Edo-era. Then, rail network was constructed in Meiji-era while highways connecting with Tokyo were developed after the WW II. Then, the relationship between regional transportation system and social factors including national⁄local politics, policy, and industry are discussed.
    本論文は，山梨県を事例に交通システム成立の経緯を整理するとともに，その経緯と社会的要因との関係を分析するものである．同県の広域交通ネットワークの発展経緯を，近世以前，明治～戦前，戦後の３つの時代区分にしたがって整理した．山梨は，元来，山々に囲まれた地域であるため，近隣地域とのアクセスが不便であった．しかし，古来より道路網が整備されており，一時は，富士川を通じた舟運も栄えた．明治時代に入り，近代化が進められると，鉄道が整備され，舟運は衰退した．戦後は，観光農業と製造業が盛んとなり，東京という巨大市場へのアクセス向上のため新笹子トンネルや中央高速道路が開通された．これらの経緯を踏まえつつ，交通に関連する社会的要因を，国内動向，政治・政策，産業・宗教に分類し，これらと交通システムとの相互関係を時代別に分析した．

    DOI： 10.3392/sociotechnica.8.11

    CiNii Research

    J-GLOBAL

    researchmap

  • Publication of land price information through the comparison of interpolated appraised prices and transaction prices

    R. Inoue, W. Nakanishi, A. Sugiura, T. Nakano, S. Yoneyama

    International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences - ISPRS Archives   38   2010

    　More details

    Publishing type：Research paper (international conference proceedings)  

    Scopus

    researchmap

▼display all

MISC

  • A CONSIDERATION ON SAMPLE SIZE AND MODEL SELECTION: AN EXAMPLE OF LOCATION DEPENDENT FUNDAMENTAL DIAGRAM

    中西航

    土木計画学研究・講演集(CD-ROM)   68   2023

    　More details

  • Classification of High-resolution Staying Population Grid Based on the Composition of Their Residential Area-Application to Kanazawa region, Japan-

    飯田吟太, 中西航

    地理情報システム学会講演論文集(CD-ROM)   2023   2023

    　More details

  • 円周上の非対称分布からなる混合分布モデルと交通量データへの応用

    長崎滉大, 加藤昇吾, 中西航, Jones, M.C

    2022

    　More details

  • 100歳対談 「測量技術を学ぶ」から本当に学んだこと

    佐田 達典, 中西 航, 池田 隆博

    71 ( 4 )   10 - 15   2021.4

    　More details

  • EXTRACTION OF MAJOR INTERSECTIONS BY ONLY LARGE SCALE VEHICLE TRAJECTORY DATA

    ZHONG Hengyi, 中西航, 安田昌平, 井料隆雅

    土木計画学研究・講演集(CD-ROM)   64   2021

    　More details

  • ANALYSIS OF TRAFFIC VOLUME BY THE ESTIMATED PARAMETER OF THE MIXTURE OF CIRCULAR DISTRIBUTION

    長崎滉大, 中西航, 朝倉康夫

    土木計画学研究・講演集(CD-ROM)   63   2021

    　More details

  • Structural estimation of a land-use model: A Bayesian approach

    小林秀佑, 中西航, 堀越光, 高山雄貴

    土木計画学研究・講演集(CD-ROM)   63   2021

    　More details

  • DIFFUSION/CONVERGENCE ANALYSIS OF CONGESTION DUE TO ROAD CLOSURES USING VEHICLE TRAJECTORY DATA

    LEE Inho, 安藤宏恵, 中西航, 朝倉康夫

    土木計画学研究・講演集(CD-ROM)   63   2021

    　More details

  • STUDY ON IMPROVING ROAD NETWORK CONNECTIVITY BY LARGEST EIGENVALUE

    安藤宏恵, 倉内文孝, 朝倉康夫, 中西航

    土木計画学研究・講演集(CD-ROM)   62   2020

    　More details

  • ANALYSIS OF CAR-FOLLOWING BEHAVIOR IN DIFFERENT TIME ZONES BY ESTIMATING THE PARAMETERS OF NEWELL’S MODEL

    吉田光太朗, 中西航, 朝倉康夫

    土木計画学研究・講演集(CD-ROM)   61   2020

    　More details

  • AN ANALYSIS ON TOURIST EXCURSION PATTERN IN KYOTO CITY USING GNSS DATA FROM SMARTPHONE APP

    山木聡一郎, 中西航, 杉浦聡志

    土木計画学研究・講演集(CD-ROM)   61   2020

    　More details

  • AN OPERATION PROBLEM OF AUTONOMOUS VEHICLE WITH ELEVATOR CALLS

    永井一輝, 中西航, 朝倉康夫

    土木計画学研究・講演集(CD-ROM)   61   2020

    　More details

  • スマートフォンアプリGNSSデータを用いた京都市内の観光流動推定に向けた基礎分析

    山木聡一郎, 中西航, 杉浦聡志

    土木学会北海道支部論文報告集(CD-ROM)   ( 76 )   2020

    　More details

  • Wi-Fi Based Sensing for Travel Behaviour Analysis

    中西航

    電子情報通信学会大会講演論文集(CD-ROM)   2020   2020

    　More details

  • 混雑時の駅構内における歩行者流の速度-密度関係の空間パターン

    平林新, 中西航, 福田大輔

    土木計画学研究・講演集(CD-ROM)   60   2019

    　More details

  • 高速道路の走行・追越車線における車両通過頻度の相関構造：対数線形モデルによる定式化

    中西 航

    統計数理研究所共同研究リポート   419   63 - 68   2019

    　More details

  • 大規模車両軌跡データ解析のための基礎的ライブラリの開発

    眞貝憲史, 田子裕亮, 瀬尾亨, 中西航

    土木計画学研究・講演集(CD-ROM)   60   2019

    　More details

  • 方向統計学を用いた道路ネットワークの分析

    長崎滉大, 中西航, 朝倉康夫

    土木計画学研究・講演集(CD-ROM)   59   2019

    　More details

  • Wi-Fiパケットセンシングによる沖縄本島観光周遊パターンの特徴抽出

    五百藏夏穂, 田中謙大, 中西航, 神谷大介, 菅芳樹, 福田大輔

    土木計画学研究・講演集(CD-ROM)   57   2018

    　More details

  • Analysis on retention and tour characteristic in major tourist spots in Okinawa

    田中謙大, 神谷大介, 我部新, 福田大輔, 中西航, 五百藏夏穂, 柳沼秀樹, 菅芳樹, 山中亮

    土木計画学研究・講演集(CD-ROM)   57   2018

    　More details

  • ネットワークの誤差を考慮した歩行経路の逐次マップマッチング手法

    中西 航

    統計数理研究所共同研究リポート406 不確実状況下での動的状態推定と知能情報科学の融合(1)   406   97 - 104   2018

    　More details

  • AN OPTIMAL ROAD NETWORK DESIGN MODEL CONSIDERING ACCESS CONTROLLED INTERSECTIONS

    小池卓武, 中西航, 柳沼秀樹, 朝倉康夫

    土木計画学研究・講演集(CD-ROM)   58   2018

    　More details

  • P2P型長距離ライドシェアの成立に関する実証分析

    山下優希, 中西航, 朝倉康夫

    土木計画学研究・講演集(CD-ROM)   58   2018

    　More details

  • Wi-Fiパケットセンシングデータを用いた広域観光周遊行動のモデル分析

    小林巴奈, 福田大輔, 中西航, 内田賢悦, 浅田拓海, 有村幹治, 菅芳樹

    土木計画学研究・講演集(CD-ROM)   58   2018

    　More details

  • Recent Studies of Network Traffic Flow Modeling

    交通工学 = Traffic engineering   52 ( 4 )   33 - 38   2017.10

    　More details

    Language：Japanese   Publisher：交通工学研究会 ; [1966]-  

    CiNii Books

    CiNii Research

    J-GLOBAL

    researchmap

  • Introduction to the Bayesian Approach(2)Bayesian Network

    交通工学 = Traffic engineering   52 ( 3 )   52 - 59   2017.7

    　More details

    Language：Japanese   Publisher：交通工学研究会 ; [1966]-  

    CiNii Books

    CiNii Research

    J-GLOBAL

    researchmap

  • 交通状態変化の早期発見に向けた車頭間隔時間情報の利用可能性

    中西航

    土木計画学研究・講演集(CD-ROM)   56   2017

    　More details

  • 非集計データに基づく非定常歩行者到着分布のモデル化

    中西航, 妹背政毅, 布施孝志, 仙石裕明

    土木計画学研究・講演集(CD-ROM)   55   2017

    　More details

  • 都市間旅行OD表の時間変動パターンの分析

    山口裕通, 中西航, 福田大輔

    土木計画学研究・講演集(CD-ROM)   55   2017

    　More details

  • Wi-Fiパケットセンサーによる観光周遊パターンの把握可能性:沖縄・本部半島における検討

    中西航, 小林巴奈, 都留崇弘, 松本拓朗, 田中謙大, 菅芳樹, 神谷大介, 福田大輔

    土木計画学研究・講演集(CD-ROM)   55   2017

    　More details

  • 周遊観光行動の調査方法に関する基礎的考察-沖縄本島を対象として-

    田中謙大, 神谷大介, 松本拓朗, 福田大輔, 中西航, 小林巴奈, 都留崇弘, 菅芳樹

    土木学会年次学術講演会講演概要集(CD-ROM)   72nd   2017

    　More details

  • Kinematic Wave理論の近年の展開:交通流の変分理論とネットワーク拡張

    和田健太郎, 瀬尾亨, 中西航, 柳原正実, 佐津川功季

    土木計画学研究・講演集(CD-ROM)   54   2016

    　More details

  • Harmonic Spatial Filteringによる歩行者流の密度-速度関係における空間相関のモデル化—Modeling Spatial Dependence on Pedestrian Fundamental Diagram by Harmonic Spatial Filtering

    中西 航, 福冨 義章, 布施 孝志

    交通工学研究発表会論文集   36   57 - 61   2016

    　More details

    Language：Japanese   Publisher：交通工学研究会  

    CiNii Books

    CiNii Research

    researchmap

  • 歩行空間評価に向けた歩行速度の空間パターン抽出に関する研究

    福冨義章, 中西航, 布施孝志

    土木計画学研究・講演集(CD-ROM)   53   2016

    　More details

  • 測位値とネットワーク情報を併用した歩行軌跡の逐次推定

    中西航, 布施孝志

    土木計画学研究・講演集(CD-ROM)   53   2016

    　More details

  • 複数モデルの混合による歩行者の行動分析に向けた検討

    中西航, 布施孝志

    土木計画学研究・講演集(CD-ROM)   52   2015

    　More details

  • 動画像を用いた人物位置推定手法の双子実験による性能検証

    中西航, 石川智行, 布施孝志

    土木計画学研究・講演集(CD-ROM)   51   2015

    　More details

  • A Basic Study on Analysis of Pedestrian Traffic Line Using Angular Data Reviewed

    交通工学研究発表会論文集   34   571 - 575   2014.8

    　More details

  • ネットワーク上の人物移動推定のための観測モデルパラメータの適応的推定

    中西航, 布施孝志

    土木計画学研究・講演集(CD-ROM)   50   2014

    　More details

  • 歩行者挙動モデルパラメータ推定への一般状態空間モデルの適用

    中西航, 高橋真美, 布施孝志

    土木計画学研究・講演集(CD-ROM)   49   2014

    　More details

  • 予測モデルの導入を考慮した人物抽出モデルのパラメータ推定に関する検討

    中西航, 布施孝志, 石川智行

    日本写真測量学会学術講演会発表論文集   2014   2014

    　More details

  • Spatiotemporal damaged area estimation with location information tweets

    KISHI Hirotoshi, NAKANISHI Wataru

    SEISAN KENKYU   65 ( 4 )   529 - 532   2013

    　More details

    Language：Japanese   Publisher：Institute of Industrial Science The University of Tokyo  

    This study aims to understand damaged area spatiotemporally by tweet data with location information as a case study of the Great East Japan Earthquake. Firstly, we make a list of tweet data with location information in Tohoku area from March 11 to March 18, 2011, from raw data of tweets in Japanese. In this process, bot accounts including seismic intensity information and "google person under" are excluded because they don't represent actual local conditions. Secondly, considering each tweet on the list as a expression of human activity of an area where tweet is made, we spatially extrapolate the tweets using Kernel density estimation approach and draw a "tweet-density distribution map." Then we try to understand the place and condition of damaged area is by this map, as well as comparison with other information such as DMSP night time map which is regarded as an indicator of ordinary human activities. As a result, we show the possibility of tweet data with location data to estimate heavily damaged area spatially and temporally. In addition, future works for further utilization of this map e.g. a review of useful comparison data for interpretation of proposed map are listed.

    DOI： 10.11188/seisankenkyu.65.529

    CiNii Books

    CiNii Research

    J-GLOBAL

    researchmap

  • 測量技術を学ぶ 第3回 水準点の精度を確かめる

    中西航, 池田隆博, 北村智史, 坂本遼

    測量   63 ( 4 )   2013

    　More details

  • 測量技術を学ぶ 第5回 電子基準点

    中西航, 神谷啓太, 坂本遼

    測量   63 ( 12 )   2013

    　More details

  • 測量技術を学ぶ 第4回 慣性航法を体感する iPhone内蔵センサによる測量実験

    中西航, 神谷啓太, 坂本遼

    測量   63 ( 8 )   2013

    　More details

  • 測量技術を学ぶ(第2回)測量機器の検定とは

    中西 航, 池田 隆博, 大戸 萌

    測量   62 ( 12 )   32 - 35   2012.12

    　More details

  • ISPRSコングレス2012参加報告

    中西 航

    写真測量とリモートセンシング   51 ( 5 )   328   2012.11

    　More details

  • 測量技術を学ぶ(第1回)レーザースキャナ

    中西 航, 池田 隆博, 大戸 萌

    測量   62 ( 8 )   28 - 31   2012.8

    　More details

  • 日本写真測量学会ISPRS奨励賞受賞 歩行者挙動モデルの導入による複雑条件下での複数人物自動追跡

    中西 航

    測量   62 ( 4 )   18 - 21   2012.4

    　More details

  • 観測モデルと事後確率を用いた人物抽出手法

    中西航, 布施孝志

    日本写真測量学会学術講演会発表論文集   2012   2012

    　More details

  • 歩行者挙動モデルの人物自動追跡への応用可能性

    中西航, 布施孝志

    土木計画学研究・講演集(CD-ROM)   43   2011

    　More details

  • シミュレーションモデルを導入した複数人物の自動追跡

    中西航, 布施孝志

    日本写真測量学会学術講演会発表論文集   2011   2011

    　More details

  • 取引価格と公的地価指標の比較を通した地価情報提供の検討

    井上亮, 中西航, 杉浦綾子, 中野拓, 米山重昭

    地理情報システム学会講演論文集(CD-ROM)   19   2010

    　More details

  • 甲府駅の開業に伴う都市整備事業と商業地区の歴史的展開

    中西航, 志摩憲寿, 家田仁

    土木計画学研究・講演集(CD-ROM)   40   2009

    　More details

  • 信玄堤治水システムの再評価から学ぶ今後の流域管理と地域計画のあり方 その4:富士川流域におけるケーススタディ

    石野和男, 對木揚, 砂田憲吾, 藤兼雅和, 市川温, 大野剛, 石田有三, 青木政一, 家田仁, 志摩憲寿, 小野忠, 中西航

    土木学会年次学術講演会講演概要集(CD-ROM)   64th ( Disk 2 )   2009

    　More details

▼display all

Presentations

  • Generation of aggregated road network by vehicle trajectory data

    Zhong, H, Seo, T, Nakanishi, W, Yasuda, S, Asakura, Y, Iryo, T

    International Symposium on Transportation Data and Modelling 2023  2023.6 

    　More details

    Event date： 2023.6

    Presentation type：Oral presentation (general)  

    researchmap

  • Estimation of Location-Dependent Fundamental Diagram based on Connected Vehicle Data and Sparse Modeling

    ODA Koki, SEO Toru, NAKANISHI Wataru

    2023  Japan Society of Traffic Engineers

    　More details

    Event date： 2023

    Language：Japanese  

    researchmap

  • Time Series Clustering of Lane Change Behavior by Using Complete Vehicle Trajectories

    UCHIKOSHI Temma, NAKANISHI Wataru

    2023  Japan Society of Traffic Engineers

    　More details

    Event date： 2023

    Language：Japanese  

    researchmap

  • A CONSIDERATION ON SAMPLE SIZE AND MODEL SELECTION: AN EXAMPLE OF LOCATION DEPENDENT FUNDAMENTAL DIAGRAM Invited

    中西航

    2023.11 

    　More details

    Event date： 2023

    researchmap

  • Classification of High-resolution Staying Population Grid Based on the Composition of Their Residential Area-Application to Kanazawa region, Japan-

    飯田吟太, 中西航

    地理情報システム学会講演論文集(CD-ROM)  2023 

    　More details

    Event date： 2023

    researchmap

  • 円周上の非対称分布からなる混合分布モデルと交通量データへの応用

    長崎滉大, 加藤昇吾, 中西航, Jones, M.C

    2022年度 統計関連学会連合大会  2022.9 

    　More details

    Event date： 2022

    researchmap

  • Mixtures of Kato-Jones distributions on the circle, with an application to traffic count data

    Kato, S, Nagasaki, K, Nakanishi, W

    The 13th Scientific Meeting of the Classification and Data Analysis Group (CLADAG 2021), 

    　More details

    Event date： 2021.9

    researchmap

  • EXTRACTION OF MAJOR INTERSECTIONS BY ONLY LARGE SCALE VEHICLE TRAJECTORY DATA

    ZHONG Hengyi, 中西航, 安田昌平, 井料隆雅

    土木計画学研究・講演集(CD-ROM)  2021 

    　More details

    Event date： 2021

    researchmap

  • DIFFUSION/CONVERGENCE ANALYSIS OF CONGESTION DUE TO ROAD CLOSURES USING VEHICLE TRAJECTORY DATA

    LEE Inho, 安藤宏恵, 中西航, 朝倉康夫

    土木計画学研究・講演集(CD-ROM)  2021 

    　More details

    Event date： 2021

    researchmap

  • ANALYSIS OF TRAFFIC VOLUME BY THE ESTIMATED PARAMETER OF THE MIXTURE OF CIRCULAR DISTRIBUTION

    長崎滉大, 中西航, 朝倉康夫

    土木計画学研究・講演集(CD-ROM)  2021 

    　More details

    Event date： 2021

    researchmap

  • Structural estimation of a land-use model: A Bayesian approach

    小林秀佑, 中西航, 堀越光, 高山雄貴

    土木計画学研究・講演集(CD-ROM)  2021 

    　More details

    Event date： 2021

    researchmap

  • A study of speed-density functional relations for varying spatiotemporal resolution using Zen Traffic Data

    Garima Dahiyal, Yasuo Asakura, Wataru Nakanishi

    2020 IEEE 23rd International Conference on Intelligent Transportation Systems, ITSC 2020  2020.9 

    　More details

    Event date： 2020.9

    researchmap

  • Empirical analysis on long-distance peer-to-peer ridesharing service in Japan

    Yuki Yamashita, Wataru Nakanishi, Yasuo Asakura

    EWGT2019: 22nd meeting on the Euro working group on transportation  2019.9 

    　More details

    Event date： 2020.9

    Language：English  

    researchmap

  • ANALYSIS OF CAR-FOLLOWING BEHAVIOR IN DIFFERENT TIME ZONES BY ESTIMATING THE PARAMETERS OF NEWELL’S MODEL

    吉田光太朗, 中西航, 朝倉康夫

    土木計画学研究・講演集(CD-ROM)  2020 

    　More details

    Event date： 2020

    researchmap

  • STUDY ON IMPROVING ROAD NETWORK CONNECTIVITY BY LARGEST EIGENVALUE

    安藤宏恵, 倉内文孝, 朝倉康夫, 中西航

    土木計画学研究・講演集(CD-ROM)  2020 

    　More details

    Event date： 2020

    researchmap

  • Wi-Fi Based Sensing for Travel Behaviour Analysis Invited

    中西航

    2020年電子情報通信学会ソサイエティ大会  2020.9 

    　More details

    Event date： 2020

    researchmap

  • AN OPERATION PROBLEM OF AUTONOMOUS VEHICLE WITH ELEVATOR CALLS

    永井一輝, 中西航, 朝倉康夫

    土木計画学研究・講演集(CD-ROM)  2020 

    　More details

    Event date： 2020

    researchmap

  • スマートフォンアプリGNSSデータを用いた京都市内の観光流動推定に向けた基礎分析

    山木聡一郎, 中西航, 杉浦聡志

    土木学会北海道支部論文報告集(CD-ROM)  2020 

    　More details

    Event date： 2020

    researchmap

  • AN ANALYSIS ON TOURIST EXCURSION PATTERN IN KYOTO CITY USING GNSS DATA FROM SMARTPHONE APP

    山木聡一郎, 中西航, 杉浦聡志

    土木計画学研究・講演集(CD-ROM)  2020 

    　More details

    Event date： 2020

    researchmap

  • バラ図と円周分布のパラメータを用いた駅周辺道路網の類型化—Classification of Road Networks around Station by Rose Diagrams and Circular Distributions

    長崎 滉大, 中西 航, 朝倉 康夫

    交通工学研究発表会論文集  2019  交通工学研究会

    　More details

    Event date： 2019

    Language：Japanese  

    researchmap

  • 高速道路の走行・追越車線における車両通過頻度の相関構造：対数線形モデルによる定式化

    中西 航

    パーティクルフィルタ研究会3月研究集会  2019.3 

    　More details

    Event date： 2019

    researchmap

  • 混雑時の駅構内における歩行者流の速度-密度関係の空間パターン

    平林新, 中西航, 福田大輔

    土木計画学研究・講演集(CD-ROM)  2019 

    　More details

    Event date： 2019

    researchmap

  • Application of the ROSE diagram to road network analysis

    Kota Nagasaki, Wataru Nakanishi, Yasuo Asakura

    Proceedings of the 24th International Conference of Hong Kong Society for Transportation Studies, HKSTS 2019: Transport and Smart Cities  2019 

    　More details

    Event date： 2019

    researchmap

  • 方向統計学を用いた道路ネットワークの分析

    長崎滉大, 中西航, 朝倉康夫

    土木計画学研究・講演集(CD-ROM)  2019 

    　More details

    Event date： 2019

    researchmap

  • 大規模車両軌跡データ解析のための基礎的ライブラリの開発

    眞貝憲史, 田子裕亮, 瀬尾亨, 中西航

    土木計画学研究・講演集(CD-ROM)  2019 

    　More details

    Event date： 2019

    researchmap

  • Wi-Fiパケットセンシングによる沖縄本島観光周遊パターンの特徴抽出

    五百藏夏穂, 田中謙大, 中西航, 神谷大介, 菅芳樹, 福田大輔

    土木計画学研究・講演集(CD-ROM)  2018 

    　More details

    Event date： 2018

    researchmap

  • Feature Extraction of Inter-Region Travel Pattern Using Random Matrix Theory and Mobile Phone Location Data

    Wataru Nakanishi, Hiromichi Yamaguchi, Daisuke Fukuda

    Transportation Research Procedia  2018 

    　More details

    Event date： 2018

    researchmap

  • P2P型長距離ライドシェアの成立に関する実証分析

    山下優希, 中西航, 朝倉康夫

    土木計画学研究・講演集(CD-ROM)  2018 

    　More details

    Event date： 2018

    researchmap

  • Wi-Fiパケットセンシングデータを用いた広域観光周遊行動のモデル分析

    小林巴奈, 福田大輔, 中西航, 内田賢悦, 浅田拓海, 有村幹治, 菅芳樹

    土木計画学研究・講演集(CD-ROM)  2018 

    　More details

    Event date： 2018

    researchmap

  • AN OPTIMAL ROAD NETWORK DESIGN MODEL CONSIDERING ACCESS CONTROLLED INTERSECTIONS

    小池卓武, 中西航, 柳沼秀樹, 朝倉康夫

    土木計画学研究・講演集(CD-ROM)  2018 

    　More details

    Event date： 2018

    researchmap

  • Analysis on retention and tour characteristic in major tourist spots in Okinawa

    田中謙大, 神谷大介, 我部新, 福田大輔, 中西航, 五百藏夏穂, 柳沼秀樹, 菅芳樹, 山中亮

    土木計画学研究・講演集(CD-ROM)  2018 

    　More details

    Event date： 2018

    researchmap

  • 非集計データに基づく非定常歩行者到着分布のモデル化

    中西航, 妹背政毅, 布施孝志, 仙石裕明

    土木計画学研究・講演集(CD-ROM)  2017 

    　More details

    Event date： 2017

    researchmap

  • 交通状態変化の早期発見に向けた車頭間隔時間情報の利用可能性

    中西航

    土木計画学研究・講演集(CD-ROM)  2017 

    　More details

    Event date： 2017

    researchmap

  • 周遊観光行動の調査方法に関する基礎的考察-沖縄本島を対象として-

    田中謙大, 神谷大介, 松本拓朗, 福田大輔, 中西航, 小林巴奈, 都留崇弘, 菅芳樹

    土木学会年次学術講演会講演概要集(CD-ROM)  2017 

    　More details

    Event date： 2017

    researchmap

  • Wi-Fiパケットセンサーによる観光周遊パターンの把握可能性:沖縄・本部半島における検討

    中西航, 小林巴奈, 都留崇弘, 松本拓朗, 田中謙大, 菅芳樹, 神谷大介, 福田大輔

    土木計画学研究・講演集(CD-ROM)  2017 

    　More details

    Event date： 2017

    researchmap

  • 都市間旅行OD表の時間変動パターンの分析

    山口裕通, 中西航, 福田大輔

    土木計画学研究・講演集(CD-ROM)  2017 

    　More details

    Event date： 2017

    researchmap

  • Kinematic Wave理論の近年の展開:交通流の変分理論とネットワーク拡張

    和田健太郎, 瀬尾亨, 中西航, 柳原正実, 佐津川功季

    土木計画学研究・講演集(CD-ROM)  2016 

    　More details

    Event date： 2016

    researchmap

  • 測位値とネットワーク情報を併用した歩行軌跡の逐次推定

    中西航, 布施孝志

    土木計画学研究・講演集(CD-ROM)  2016 

    　More details

    Event date： 2016

    researchmap

  • 歩行空間評価に向けた歩行速度の空間パターン抽出に関する研究

    福冨義章, 中西航, 布施孝志

    土木計画学研究・講演集(CD-ROM)  2016 

    　More details

    Event date： 2016

    researchmap

  • Harmonic Spatial Filteringによる歩行者流の密度-速度関係における空間相関のモデル化—Modeling Spatial Dependence on Pedestrian Fundamental Diagram by Harmonic Spatial Filtering

    中西 航, 福冨 義章, 布施 孝志

    交通工学研究発表会論文集  2016  交通工学研究会

    　More details

    Event date： 2016

    Language：Japanese  

    researchmap

  • Multi- Target detection from full-waveform airborne laser scanner using phd filter

    T. Fuse, D. Hiramatsu, W. Nakanishi

    International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences - ISPRS Archives  2016 

    　More details

    Event date： 2016

    researchmap

  • ADAPTIVE PARAMETER ESTIMATION OF PERSON RECOGNITION MODEL IN A STOCHASTIC HUMAN TRACKING PROCESS

    W. Nakanishi, T. Fuse, T. Ishikawa

    International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences - ISPRS Archives  2015.5 

    　More details

    Event date： 2015.5

    researchmap

  • 動画像を用いた人物位置推定手法の双子実験による性能検証

    中西航, 石川智行, 布施孝志

    土木計画学研究・講演集(CD-ROM)  2015 

    　More details

    Event date： 2015

    researchmap

  • 複数モデルの混合による歩行者の行動分析に向けた検討

    中西航, 布施孝志

    土木計画学研究・講演集(CD-ROM)  2015 

    　More details

    Event date： 2015

    researchmap

  • A Basic Study on Analysis of Pedestrian Traffic Line Using Angular Data

    交通工学研究発表会論文集  2014.8  交通工学研究会

    　More details

    Event date： 2014.8

    Language：Japanese  

    researchmap

    Other Link： https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-25289161/

  • Sensitive analysis of observation model for human tracking using a stochastic process

    W. Nakanishi, T. Fuse

    International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences - ISPRS Archives  2014 

    　More details

    Event date： 2014

    researchmap

  • 歩行者挙動モデルパラメータ推定への一般状態空間モデルの適用

    中西航, 高橋真美, 布施孝志

    土木計画学研究・講演集(CD-ROM)  2014 

    　More details

    Event date： 2014

    researchmap

  • ネットワーク上の人物移動推定のための観測モデルパラメータの適応的推定

    中西航, 布施孝志

    土木計画学研究・講演集(CD-ROM)  2014 

    　More details

    Event date： 2014

    researchmap

  • 予測モデルの導入を考慮した人物抽出モデルのパラメータ推定に関する検討

    中西航, 布施孝志, 石川智行

    日本写真測量学会学術講演会発表論文集  2014 

    　More details

    Event date： 2014

    researchmap

  • Stochastic process modeling for multiple human tracking using stereo video camera

    Takashi Fuse, Wataru Nakanishi

    Proceedings of SPIE - The International Society for Optical Engineering  2013 

    　More details

    Event date： 2013

    researchmap

  • 観測モデルと事後確率を用いた人物抽出手法

    中西航, 布施孝志

    日本写真測量学会学術講演会発表論文集  2012 

    　More details

    Event date： 2012

    researchmap

  • Multiple human tracking in complex situation by data assimilation with pedestrian behavior model

    W. Nakanishi, T. Fuse

    International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences - ISPRS Archives  2012 

    　More details

    Event date： 2012

    researchmap

  • シミュレーションモデルを導入した複数人物の自動追跡

    中西航, 布施孝志

    日本写真測量学会学術講演会発表論文集  2011 

    　More details

    Event date： 2011

    researchmap

  • 歩行者挙動モデルの人物自動追跡への応用可能性

    中西航, 布施孝志

    土木計画学研究・講演集(CD-ROM)  2011 

    　More details

    Event date： 2011

    researchmap

  • 取引価格と公的地価指標の比較を通した地価情報提供の検討

    井上亮, 中西航, 杉浦綾子, 中野拓, 米山重昭

    地理情報システム学会講演論文集(CD-ROM)  2010 

    　More details

    Event date： 2010

    researchmap

  • Publication of land price information through the comparison of interpolated appraised prices and transaction prices

    R. Inoue, W. Nakanishi, A. Sugiura, T. Nakano, S. Yoneyama

    Special Joint Symposium of ISPRS Technical Commission IV and AutoCarto 2010 and ASPRS/CaGIS Fall Specialty Conference  2010.11 

    　More details

    Event date： 2010

    researchmap

  • 信玄堤治水システムの再評価から学ぶ今後の流域管理と地域計画のあり方 その4:富士川流域におけるケーススタディ

    石野和男, 對木揚, 砂田憲吾, 藤兼雅和, 市川温, 大野剛, 石田有三, 青木政一, 家田仁, 志摩憲寿, 小野忠, 中西航

    土木学会年次学術講演会講演概要集(CD-ROM)  2009 

    　More details

    Event date： 2009

    researchmap

  • 甲府駅の開業に伴う都市整備事業と商業地区の歴史的展開

    中西航, 志摩憲寿, 家田仁

    土木計画学研究・講演集(CD-ROM)  2009 

    　More details

    Event date： 2009

    researchmap

  • 深層学習を用いた交通状態予測のための走行軌跡データに基づくネットワーク表現

    安田昌平, 片山広樹, 中西航, 井料隆雅

    第21回ITSシンポジウム2023  2023.12 

    　More details

  • Mixtures of Kato-Jones distributions on the circle, with an application to traffic count data

    Nagasaki, K, Kato, S, Nakanishi, W

    The 14th International Conference of the ERCIM WG on Computational and Methodological Statistics CMStatistics 2021  2021.12 

    　More details

▼display all

Awards

  • 土木学会 論文奨励賞

    2023.6  

    　More details

  • 第39回交通工学研究発表会 研究奨励賞

    2019.8  

    長崎滉大, 中西航, 朝倉康夫

    　More details

  • 第16回ITSシンポジウム2018 ベストポスター賞

    2018.12  

    　More details

  • 土木計画学研究委員会優秀論文賞

    2016.11  

    　More details

  • 第11回米谷・佐々木賞(学位論文部門)

    2015.11   システム科学研究所  

    　More details

  • 学会奨励賞

    2014.5   日本写真測量学会  

    　More details

▼display all

Research Projects

  • Development of statistical analysis and modeling methodology for dynamic transportation phenomena based on directional statistics

    Grant number：24K21656  2024.6 - 2026.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Challenging Research (Exploratory)

    　 More details

    Grant amount：\6240000 （ Direct Cost: \4800000 、 Indirect Cost：\1440000 ）

    researchmap

  • 都市狭域における交流促進に資する属性別滞在人口分析モデルの構築

    Grant number：24K01004  2024.4 - 2028.3

    日本学術振興会  科学研究費助成事業  基盤研究(B)

    中西 航, 瀬谷 創, 杉浦 聡志, 中島 弘貴, 吉田 崇紘

    　 More details

    Grant amount：\18460000 （ Direct Cost: \14200000 、 Indirect Cost：\4260000 ）

    researchmap

  • 高解像度行列データ活用に資する微小かつ有意な情報の抽出手法

    Grant number：23K17551  2023.6 - 2026.3

    日本学術振興会  科学研究費助成事業  挑戦的研究(萌芽)

    中西 航, 山口 裕通

    　 More details

    Grant amount：\6240000 （ Direct Cost: \4800000 、 Indirect Cost：\1440000 ）

    researchmap

  • 高速道路単路部の交通流理論の検証と交通制御システムの戦略的デザイン

    Grant number：23H01524  2023.4 - 2027.3

    日本学術振興会  科学研究費助成事業  基盤研究(B)

    和田 健太郎, 柳原 正実, 塩見 康博, 中西 航, 瀬尾 亨

    　 More details

    Grant amount：\17810000 （ Direct Cost: \13700000 、 Indirect Cost：\4110000 ）

    researchmap

  • 高速道路単路部の交通流理論の検証と交通制御システムの戦略的デザイン

    Grant number：23K26218  2023.4 - 2027.3

    日本学術振興会  科学研究費助成事業  基盤研究(B)

    和田 健太郎, 柳原 正実, 塩見 康博, 中西 航, 瀬尾 亨

    　 More details

    Grant amount：\17810000 （ Direct Cost: \13700000 、 Indirect Cost：\4110000 ）

    現在，我が国の都市間高速道路の主要な渋滞箇所である単路部（サグやトンネル等）では，ペースメーカーライトや音声注意喚起等の交通制御が各地で導入され，一定の成果をあげている．本研究の目的は，交通流に様々なパターンで介入できる“実験的な状況”を活用し，安定的な交通性能の改善に繋がる知見を得ることである．具体的には，本研究は，大きく次の2つの柱からなる：(A)「走行挙動-交通性能」関係を観測スケールで記述するマクロな交通流理論の確立・検証；(B)「交通制御による介入-走行挙動変化」関係を把握のためのミクロな運転挙動分析．
    <BR>
    初年度の令和5年度では主に，(A), (B) に関わる要素技術の開発を行った．具体的には，(A) では，マクロ交通流理論に基づき渋滞中の速度回復挙動と交通容量を定量的に結びつける手法を様々な地点に適用し，その頑健性を確認するとともに，応用としてボトルネックの正確な位置把握や交通制御導入効果の持続性について考察した．また，理論の入力となる基本パラメータ（交通基本図）の新たな推定手法や，今後の理論検証に必要となる車線変更も含む多車線道路での車両軌跡を精緻に再構築する手法の開発を行った．(B) では，代表的なミクロな運転挙動分析として車線変更挙動に焦点を当て，車両軌跡に基づく時系列クラスタリングや交通流への影響の類型化，運転意図とストレス指標の関係分析と多角的に分析を行った．
    <BR>
    また，本研究のメンバーも参画している産学連携自主研究グループで上記成果について共有し，研究期間後半で分析予定の実証実験シナリオについての議論を開始した（実験自体はあくまで産学連携研究グループで実施される）．

    researchmap

  • Monitoring of Road Traffic Systems under Information Acquisition Constraints in Times of Disasters

    Grant number：23H01521  2023.4 - 2026.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    　 More details

    Grant amount：\11440000 （ Direct Cost: \8800000 、 Indirect Cost：\2640000 ）

    researchmap

  • 共有モビリティと都市交通システムの共進化

    Grant number：22H01610  2022.4 - 2025.3

    日本学術振興会  科学研究費助成事業 基盤研究(B)  基盤研究(B)

    高山 雄貴, 村上 大輔, 杉浦 聡志, 大澤 実, 中西 航

    　 More details

    Grant amount：\17420000 （ Direct Cost: \13400000 、 Indirect Cost：\4020000 ）

    researchmap

  • Estimation, prediction, and control of road transportation system by integrating traffic flow theory and machine learning

    Grant number：20H02267  2020.4 - 2024.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)  Grant-in-Aid for Scientific Research (B)

    　 More details

    Grant amount：\17550000 （ Direct Cost: \13500000 、 Indirect Cost：\4050000 ）

    researchmap

  • 点過程理論による交通量変動メカニズムの記述とその交通制御への応用

    Grant number：18K13846  2018.4 - 2022.3

    日本学術振興会  科学研究費助成事業 若手研究  若手研究

    中西 航

    　 More details

    Grant amount：\4290000 （ Direct Cost: \3300000 、 Indirect Cost：\990000 ）

    本研究課題では、複数の車両検知器で観測される一連の車両到着時刻に対して非線形モデリングを行い、交通量変動を記述する。その結果から、交通状態改善のために制御が必要な車両や車群を個別に特定し、それらの車両に対する速度制御などの効果を実験的に示すことで、新たな交通制御の可能性を検討する。このうち後半の2年間は、交通量変動の原因がいつどこの検知器で観測されうるのかを念頭に、観測結果と具体的な個別車両の挙動との関連づけを行うことを目的としている。
    本年度は、まず一昨年度に発見された課題であるミクロ的な分析とマクロ理論との整合性について、さらなる検討を行った。具体的には、分析の時間・空間幅の設定を通して、分析が不安定になる条件を絞り込んだ。必ずしも原因は明らかとなっていないが、一定程度の時間・空間幅を持たせれば不安定性は大きく減少することを確認している。それと並行して、昨年度までの成果をベースに、各検知器における車両到着パターン変動の原因を車両個別の挙動に対応づけるための検討を行った。現在までに、目視でも明示的な、たとえば特定の車両の速度が著しく低下しているような場合にはその車両を、渋滞の原因としてモデル上でも比較的安定して検出できることを確認している。一方で、目視で明示的とは言えない渋滞の発生地点・時点については、モデル上で検出された場合であってもその結果の妥当性を評価する方法を別途検討する必要があることが確認された。

    researchmap

  • Vulnerability/reliability evaluation of arterial road network with time-space integration of large-scale and heterogeneous data

    Grant number：17H03321  2017.4 - 2021.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)  Grant-in-Aid for Scientific Research (B)

    NAKAYAMA Shoichiro

    　 More details

    Grant amount：\16900000 （ Direct Cost: \13000000 、 Indirect Cost：\3900000 ）

    It is important to examine what is a reliable road network for both emergency and ordinary situations in Japan. In this research project, probe data including ETC2.0 as well as traffic counter data are integrated, and within-day/day-to-day dynamics of traffic states of road network was investigated. This enables us to evaluate vulnerability analysis of road network for disaster situations and to make a travel time reliability analysis under the ordinary situations.

    researchmap

  • Mathematical Modelling of ransport Network Management under Large Scale Natural Disaster

    Grant number：17H01297  2017.4 - 2021.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (A)

    Asakura Yasuo

    　 More details

    Grant amount：\41990000 （ Direct Cost: \32300000 、 Indirect Cost：\9690000 ）

    This research aims to build a theoretical basis for the management of wide-area transport networks in the event of a large-scale natural disaster that greatly exceeds the people's daily activity area. We focused on the problems related to emergency wide-area evacuation within about one week after the disaster and the problem of supplying daily supplies to evacuees. We have achieved followings; (1) formulation of a common theoretical foundation for transportation network management in the event of a disaster,(2) establishment of a management theory for wide-area evacuation and transportation of daily necessities and (3) a case study ofintegrated wide-area evacuation and transport supply of daily necessities.

    researchmap

  • Integrated Analytical Modeling of Urban Rail Transit System with High-Frequent Operations

    Grant number：17H03320  2017.4 - 2020.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)  Grant-in-Aid for Scientific Research (B)

    Daisuke Fukuda

    　 More details

    Grant amount：\14170000 （ Direct Cost: \10900000 、 Indirect Cost：\3270000 ）

    This Kakenhi project conducted the following series of studies in order to obtain comprehensive insights into the train delay and its propagation phenomena in urban rail systems: (1) The extension of the concept of "Train Fundamental Diagram" and its empirical verification; (2) The development of dynamic traffic assignment model for urban rail system; (3) The development of an economic evaluation method for delay and punctuality of urban rail transit based on scheduling approach.

    researchmap

  • Evaluation Method of Pedestrian Facility Based on Spatial Statistics

    Grant number：15K18131  2015.4 - 2019.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Young Scientists (B)  Grant-in-Aid for Young Scientists (B)

    Nakanishi Wataru

    　 More details

    Grant amount：\4030000 （ Direct Cost: \3100000 、 Indirect Cost：\930000 ）

    We construct a pedestrian facility evaluation method based on spatial statistics and flow-density relationship of traffic theory. The following three results were obtained. (1) A pedestrian trajectory estimation and its accuracy evaluation method using spatio-temporally high resolution data from GPS observation by a smartphone was developed. (2) Using these data, the method of deriving and visualizing the fluctuation in the flow-density relationship in the facility was constructed by considering spatial correlation. (3) We applied this method to long-term observation data and confirmed the stability of the estimation results.

    researchmap

  • Study on Locally Adapted, Modified and Advanced Transportation (LAMAT) in Middle-sized Asian Cities

    Grant number：15H02632  2015.4 - 2019.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)  Grant-in-Aid for Scientific Research (A)

    YAI TETSUO

    　 More details

    Grant amount：\39520000 （ Direct Cost: \30400000 、 Indirect Cost：\9120000 ）

    Paratransit, which is a transportation system rooted in the region, has been redefined under the name LAMAT (Locally Adapted, Modified and Advanced Transport). Together with researchers from Vietnam, Philippines, Cambodia, Indonesia, Thailand, and Sri Lanka, we conducted a comprehensive survey of medium-sized cities in Asian countries, including users, drivers, unions, and governments. Then, we clarified the uniqueness and generality of LAMAT, and developed a planning analytical tool to evaluate LAMAT's plans and projects.In addition, by experimenting some results in the model area, we obtained useful results to promote planning and projects in which LAMAT and the next-generation transportation system harmonize.

    researchmap

  • 自動追跡と行動解析に基づく人物動態把握手法の高度化

    Grant number：13J09044  2013

    日本学術振興会  科学研究費助成事業 特別研究員奨励費  特別研究員奨励費

    中西 航

    　 More details

    Grant amount：\1000000 （ Direct Cost: \1000000 ）

    本年度は、まず、研究課題の前提となる人物追跡手法の基礎手法について発表を行った。また、人物追跡を長期間連続的に行うために不可欠となる、人物抽出手法を構築し、その発表を行った。その上で、これらの手法において利用されている予測モデル・観測モデルの評価を行った。具体的には、追跡および抽出で利用している一般状態空間モデルの枠組みを利用して、各時点において利用している予測・観測モデルの適合性を定量的に評価する手法を構築した。特に、予測モデルについては、逐次的に追跡精度の良いモデルを選択する手法として、一般状態空間モデルの尤度をモニタリングしながらモデル形式を選択する手法と、一般状態空間モデルにおいてパラメータ分布自体を逐次ベイズ推定し最適化する手法との2種類を組み合わせた。構築手法の性能を実データへの適用により検証するとともに、適した予測モデルが時間・空間および個人によって異なっていることを確認した。このことにより、複数モデルを自動的に使い分けることで、従来は困難であった、多様なモデルに従う人物が共存する場における挙動予測の可能性を示した。これらの成果については、各分野における論文誌・学会で発表するべく、論文を執筆・投稿中である。さらに、動線解析手法に対しては、自動追跡によって取得される動線に含まれる計測誤差と、その誤差が集計情報の作成時に及ぼす影響との関係について基礎的な検討を行った。その結果、動線の計測誤差と集計によって発生する誤差との分離が重要であることが確認された。

    researchmap

▼display all