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Dynamic feature analysis in bidirectional pedestrian flows

Chinese Physics B 2016年第2期25卷 573-584页

作者：杨晓霞 Winnie Daamen Serge Paul Hoogendoorn 董海荣姚秀明 State Key Laboratory of Rail Traffic Control and Safety Beijing Jiaotong University Department of Transport and Planning Faculty of Civil Engineering and GeosciencesDelft University of Technology School of Electronic and Information Engineering Beijing Jiaotong University

Analysis of dynamic features of pedestrian flows is one of the most exciting topics in pedestrian dynamics. This paper focuses on the effect of homogeneity and heterogeneity in three parameters of the social force model, namely desired velocity, reaction time, and body size, on the moving dynamics of bidirectional pedestrian flows in the corridors. The speed and its deviation in free flows are investigated. Simulation results show that the homogeneous higher desired speed which is less than a critical threshold, shorter reaction time or smaller body size results in higher speed of flows. The free dynamics is more sensitive to the heterogeneity in desired speed than that in reaction time or in body size. In particular, an inner lane formation is observed in normal lanes. Furthermore, the breakdown probability and the start time of breakdown are focused on. This study reveals that the sizes of homogeneous desired speed, reaction time or body size play more important roles in affecting the breakdown than the heterogeneities in these three parameters do.

关键词： bidirectional flow social force model heterogeneity homogeneity breakdown

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Application of System on Chip (SoC) devices for the design of a smoke detector working with megapixel image streams

Application of System on Chip (SoC) devices for the design o...

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International Conference on Methods and Models in Automation and Robotics (MMAR)

作者： Wiesław Pamuła Maciej Sajkowski Tomasz Stenzel Jarosław Michalak Grzegorz Baron Bartłomiej Szady Department of Transport Systems and Traffic Engineering Silesian University of Technology Katowice Poland Department of Power Electronics Silesian University of Technology Gliwice Poland Faculty of Automatic Control Institute of Informatics Silesian University of Technology Gliwice Poland

The paper discusses the application of System on Chip devices for processing Megapixel video streams. The domain of image processing using high resolution images is very demanding in the scope of calculating power and frequently exploits special processing hardware. The progress of integration technology brings about SoC which are capable of meeting such processing demands. Characteristics of FPGA and DSP based systems are assessed. A concise survey of chip solutions is presented and a pair of representative systems is chosen for comparison of their properties. The design of a smoke detection system is used for evaluating the advantages and drawbacks of using such SoC solutions. Almost identical image processing algorithms are implemented in the case of FPGA and DSP. Both solutions meet the image processing requirements and are suitable for real time processing. FPGA based solution is much faster as it uses pipelining for improving the utilisation of scarce memory resources.

关键词： Streaming media Digital signal processing Field programmable gate arrays Program processors Image resolution Standards

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The comparison of travel patterns between taxi and private car at Beijing Capital International Airport area

The comparison of travel patterns between taxi and private c...

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Youth Academic Annual Conference of Chinese Association of Automation (YAC)

作者： Jiyuan Tan Yibin Huang Li Wang Weiwei Guo Luxi Dong Jian Gao Li Li Beijing Key Lab of Urban Intelligent Traffic Control Technology North China University of Technology Beijing China Research Institute of Highway Ministry of Transport Beijing China Department of Automation Tsinghua University Beijing Beijing China

ISBN: (纸本)9781538629024

In last two years, the rapid development of Internet based ride-sharing has brought great changes to travel pattern of residents. However, few studies has been made to find out the unique travel patterns of Internet based ride-sharing. In this paper, License plate data at the Beijing Capital International Airport area are used to study the travel patterns of taxis and private cars. By comparing the trip records of taxis and private cars, two indicators, the distribution characteristics of vehicle volume and the balanced patterns of time, are selected to identify the ride-sharing cars from private cars. The results showed that there are more taxis than private cars arrival the airport in the evening and the arriving time of private cars is more concentrated. Finally, we used these indicators identify the ride-sharing vehicles from private cars. All these findings will be useful for further research and policy making.

关键词： Public transportation Automobiles Airports Internet Licenses Roads

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Driver's mental workload estimation based on empirical physiological indicators

Driver's mental workload estimation based on empirical physi...

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Youth Academic Annual Conference of Chinese Association of Automation (YAC)

作者： Weiwei Guo Xiaoting Tian Jiyuan Tan Li Zhao Li Li Beijing Key Lab of Urban Intelligent Traffic Control Technology North China University of Technology Beijing China Research Institute of Highway Ministry of Transport Beijing China Department of Automation Tsinghua University Beijing China

ISBN: (纸本)9781509044245

In order to explore driver's mental workload under different traffic situations, the field experiment aimed at giving quantitative assessments of driver's mental workload within different maneuvers by physiological indicators, such as ECG and EDA. Moreover, the driving safety assessments in different mental workload were analyzed. Firstly, the HRV was extracted from the ECG signal de-noised and filtered. And then the AVHR, SDNN, RMSSD, PNN50 and LF/HF of HRV in time-frequency were analyzed respectively. Consequently, the results showed that the driver's AVHR, SDNN, RMSSD, PNN50 and LF/HF of HRV increased obviously in left-turning maneuver when compared with those in straight-going maneuver, and there was no significant physiological difference between those in right-turning maneuver and straight-going maneuver. The inference was driver's mental workload was the highest when taking a left-turn. Furthermore, the physiological index indicated the mental workload was higher in night driving than that in daytime driving. Conclusion is helpful for the development of driving assistance based on physiological information detection.

关键词： Vehicles Electrocardiography Heart rate variability Roads Turning Physiology Skin

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Addressing Security in the ATM Environment: From Identification to Validation of Security Countermeasures with Introduction of New Security Capabilities in the ATM System Context

Addressing Security in the ATM Environment: From Identificat...

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International Conference on Availability, Reliability and Security, ARES

作者： Patrizia Montefusco Rosana Casar Rainer Koelle Tim H. Stelkens-Kobsch Traffic Control System Engineering LEONARDO Naples Italy School of Computing and Communications Lancaster University Lancaster United Kindom Department of Transport and Information Technology ISDEFE Madrid Spain Institute of Flight Guidance German Aerospace Center (DLR) Braunschweig Germany

This paper addresses the full lifecycle of security countermeasures identified in the Security Risk Analysis of the future Air traffic Management System (ATM). The process establishes new security functions identified in the GAMMA project [1] and their implementations in order to ensure acceptable levels of security for ATM. In this project, ATM Security is addressed by focusing on two dimensions defined by Single European Sky ATM Research [2]: establishing a collaborative support capability by defining a framework embracing three-levels for Security Management (i.e. European, National, and Local) and developing security measures for the self-protection/resilience of the ATM Systems by exploiting automated security-related functions to handle potential threats. This paper concentrates on the second dimension and how the countermeasures are identified, implemented and developed in prototypes. The prototypes will then be validated in an operational scenario, through the new concept introduced by the project. The reader will be accompanied through a practical example of the whole process on how ATM Security needs have been identified. The objective is to protect the core ATM Security functionalities (Primary Assets) and corresponding Supporting Assets. We identified 44 of the most feared threat scenarios in terms of impact on the SESAR Key Performance Areas (KPA). The threat scenario described in this paper is "False ATCO", affecting the Supporting Asset "Voice system". The developed prototype is "SACom" (Secure ATC Communication) that considers the security countermeasures identified in the risk treatment analysis to reduce the risks. The paper concludes with the description of the activities planned for validating the SACom prototype as part of the proposed global solution.

关键词： Europe Security management Prototypes Navigation Risk management Stakeholders

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Bus Priority System Using Radio Frequency Identification (RFID) Detection in Singapore

Bus Priority System Using Radio Frequency Identification (RF...

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2015年南京第十四届亚太智能交通论坛

作者： Tatsuya Higuchi Lincoln Tan Musthafa Ibrahim Joanne Cheong Traffic Control Systems Engineering Section Electronic Control Technology Department ICT Solution He Traffic Control & Transportation Division Mitsubishi Heavy Industries Engine System Asia Pie LtdSin Intelligent Transport Systems Development Land Transport AuthoritySingapore City219428Singapore

Making public transport a choice mode is one of the three key strategic thrusts listed in Land transport Master Plan (LTMP) *** achieve that, it is important to make the public transport system attractive for use by the *** of such application identified is to provide signal priority for busses at traffic light *** scan and assessment of various detection technologies have indicated that RFID is the appropriate, open standards and economical technology for the bus *** is a wireless non-contact system that uses radio-frequency electromagnetic fields to transfer data from a tag attached to an object, for the purposes of automatic identification and *** tags has been widely used in various industries, including transportation for payment services such as for transit fares, highway tolls and parking fares, as well as in the areas of vehicle identification and access control in many *** the cost of RFID tags has decreased significantly over time, its detection capability has also improved to allow longer range *** this, a concerted initiative between the local authorities and the industry to conduct a technical trial for traffic light priority for buses using radio frequency identification technology (RFID) was executed at selected test locations in *** paper discusses on the technical trial conducted to assess the accuracy and reliability of Bus Priority System using RFID in providing traffic light priority for buses in Singapore.

关键词： ITS signal priority technical trial radio frequency identification

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The application of Visual Evoked Potentials in brain-computer interface

Solid State Phenomena

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Solid State Phenomena 2014年 208卷 102-108页

作者： Nawrocka, Agata Nawrocki, Marcin AGH University of Science and Technology Department of Process Control Poland AGH University of Science and Technology Department of Mining Dressing and Transport Machines Poland

ISBN: (纸本)9783037858554

The article presents the concept of a universal BCI system based on the detection of Steady-State Visual Evoked Potentials (SSVEP). One of the possibilities of its application involves, for example, the visual keyboard which makes it possible to enter data (alphanumeric characters) into the computer without using muscles. The first part discusses the construction and the principle of operation of BCI interfaces and next the most frequently used evoked potentials are presented. An application allowing for an analysis of the EEG signal of a person subject to effect of the photostimulator using stimuli with the frequency ranging from 1 to 40 Hz. As a result of the developed program the appropriate frequency of a stimulus in the EEG signal was detected and signalled. © (2014) Trans Tech Publications, Switzerland.

关键词： Brain computer interface

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Aviator system as an alternative to warehouse handling devices

Aviator system as an alternative to warehouse handling devic...

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Conference on Research, Production and Use of Steel Ropes, Conveyors and Hoisting Machines, VVaPOL 2014

作者： Bindzár, Peter Straka, Martin Thate, Thomas Balog, Michal Technical University of Košice Process Control and Geotechnology Logistic institute of industry and transport Park Komenského 14 Košice Slovakia Dresden University of Technology Hettnerstraße 3 Gerhart-Potthoff-Bau Germany Technical University of Košice Institute of Advanced Technologies Department of Production Management Bayerova 1 Prešov Slovakia

ISBN: (纸本)9783038353164

The Aviator is a floor-free working warehouse vehicle, which gives a third alternative to the market of stacker cranes that consist also of the narrow aisle stacker and the rack feeder. Officially introduced as Transfaster in 2002, this full-automatic working system has been realized several times. This article will give an overview concerning the structure of the system and its functionality, and will compare it to conventional systems regarding advantages, disadvantages and performance. Therefore ways of calculating cycle times are introduced. © (2014) Trans Tech Publications, Switzerland.

关键词： Floors

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Breakdown Phenomenon Study in the Bidirectional Pedestrian Flow

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transportation Research Procedia 2014年 2卷 456-461页

作者： Xiaoxia Yang Winnie Daamen Serge Paul Hoogendoorn Yao Chen Hairong Dong State Key Laboratory of Rail Traffic Control and Safety Beijing Jiaotong University Beijing 100044 China Department of Transport and Planning Faculty of Civil Engineering and Geosciences Delft University of Technology Delft 2628 CN Netherlands School of Electronic and Information Engineering Beijing Jiaotong University Beijing 100044 China

Pedestrian dynamics has been being a popular research area. In this paper, breakdown probability in the bidirectional flow that includes pedestrians with heterogeneities is investigated. Reaction time appears to have the most pronounced breakdown proba- bility, followed by desired velocity and then body size. The relationship between the start time of breakdown and inflow reflects the decreasing trend of the start time of breakdown with increasing inflow. Furthermore, the smaller the value of the start time of breakdown for the same inflow, the larger the effect of the heterogeneity in a parameter of the social force model on breakdown by cross-comparisons.

关键词： bidirectional pedestrian flow heterogeneity the social force model breakdown phenomenon pedestrian dynamics

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Development and Application of an Evaluation Framework for Urban traffic Management and Intelligent transport Systems

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Procedia - Social and Behavioral Sciences 2012年 48卷 3102-3112页

作者： Ioannis Kaparias Niv Eden Antonios Tsakarestos Ayelet Gal-Tzur Marcus Gerstenberger Suzanne Hoadley Patrick Lefebvre Justin Ledoux Michael Bell Centre for Transport Studies Imperial College London Skempton Building South Kensington Campus London SW7 2BU UK Transportation Research Institute Technion – Israel Institute of Technology Technion City Haifa Israel Chair of Traffic Engineering and Control Technische Universität München Arcistrasse 21 80333 Munich Germany Polis – European Cities and Regions Networking for Innovative Transport Solutions 98 rue du Trône B-1050 Brussels Belgium Department of Roads and Transportation City of Paris 40 rue du Louvre 75001 Paris France

The aim of this paper is to present and apply a new evaluation framework for traffic management and Intelligent transport Systems, to assist urban transport authorities in assessing relevant policies and technologies as to their performance. The principles behind performance measures and indices are outlined, along with a description of theframework development methodology. Two Key Performance Indicators (KPIs) for the topics of mobility and traffic accidents respectively are formulated and operative definitions are presented. Then, the new KPIs are applied to a case study in the city of Paris, involving the introduction of a scheme granting priority to buses at signalised junctions. The results from the before- and after-analysis are reported and interpreted, not only in terms of the case study itself, but most importantly from the standpoint of the applicability of the evaluation framework.

关键词： urban traffic management Intelligent transport Systems performance evaluation

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