发布求助
文献互助 智能选刊 最新文献

International Journal of Vehicular Technology最新文献

筛选
英文 中文
GPS and Stereovision-Based Visual Odometry: Application to Urban Scene Mapping and IntelligentVehicle Localization GPS和基于立体视觉的视觉里程计:在城市场景测绘和智能车辆定位中的应用
International Journal of Vehicular Technology Pub Date : 2011-05-17 DOI: 10.1155/2011/439074
Lijun Wei, C. Cappelle, Y. Ruichek, Frederick Zann
{"title":"GPS and Stereovision-Based Visual Odometry: Application to Urban Scene Mapping and IntelligentVehicle Localization","authors":"Lijun Wei, C. Cappelle, Y. Ruichek, Frederick Zann","doi":"10.1155/2011/439074","DOIUrl":"https://doi.org/10.1155/2011/439074","url":null,"abstract":"We propose an approach for vehicle localization in dense urban \u0000environments using a stereoscopic system and a GPS sensor. \u0000Stereoscopic system is used to capture the stereo video flow, to \u0000recover the environments, and to estimate the vehicle motion based \u0000on feature detection, matching, and triangulation from every image \u0000pair. A relative depth constraint is applied to eliminate the \u0000tracking couples which are inconsistent with the vehicle \u0000ego-motion. Then the optimal rotation and translation between the \u0000current and the reference frames are computed using an RANSAC \u0000based minimization method. Meanwhile, GPS positions are obtained \u0000by an on-board GPS receiver and periodically used to adjust the \u0000vehicle orientations and positions estimated by stereovision. The \u0000proposed method is tested with two real sequences obtained by a \u0000GEM vehicle equipped with a stereoscopic system and a RTK-GPS \u0000receiver. The results show that the vision/GPS integrated \u0000trajectory can fit the ground truth better than the vision-only \u0000method, especially for the vehicle orientation. And vice-versa, \u0000the stereovision-based motion estimation method can correct the \u0000GPS signal failures (e.g., GPS jumps) due to multipath problem or \u0000other noises.","PeriodicalId":269774,"journal":{"name":"International Journal of Vehicular Technology","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120919625","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 45
Vehicle Detection Based on Perspective Transformation Using Rear-View Camera 基于视角变换的后视摄像头车辆检测
International Journal of Vehicular Technology Pub Date : 2011-04-11 DOI: 10.1155/2011/279739
Shiho Tanaka, K. Yamada, Toshio Ito, T. Ohkawa
{"title":"Vehicle Detection Based on Perspective Transformation Using Rear-View Camera","authors":"Shiho Tanaka, K. Yamada, Toshio Ito, T. Ohkawa","doi":"10.1155/2011/279739","DOIUrl":"https://doi.org/10.1155/2011/279739","url":null,"abstract":"In recent times, the number of vehicles with a rear-view camera has been increasing. The rear-view camera can be utilized as a sensor for monitoring a collision from behind the vehicle in a driving scene. To prevent rear-end collisions, we have been developing a technology that detects approaching vehicles from images obtained using an onboard rear-view camera. In conventional vehicle detection methods, often, camera-view images are used. However, it is difficult to accurately estimate the position of a distant approaching vehicle using such images. In this paper, we propose an improved method to accurately estimate the position of distant approaching vehicles by using virtual top-view images. The displacement of the vehicle in the top-view image is proportional to its speed. Thus, the proposed method can provide the accurate position of the distant vehicle. We describe the details of the proposed method and its availability by the experiment using actual images.","PeriodicalId":269774,"journal":{"name":"International Journal of Vehicular Technology","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115612721","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 19
Evaluation of selective broadcast algorithms for safety applications in vehicular ad hoc networks 车辆自组织网络中安全应用的选择性广播算法评估
International Journal of Vehicular Technology Pub Date : 2011-04-10 DOI: 10.1155/2011/730895
Kaan Bür, M. Kihl
{"title":"Evaluation of selective broadcast algorithms for safety applications in vehicular ad hoc networks","authors":"Kaan Bür, M. Kihl","doi":"10.1155/2011/730895","DOIUrl":"https://doi.org/10.1155/2011/730895","url":null,"abstract":"Just as wireless communications develop\u0000further to achieve higher performance, new application\u0000areas emerge to challenge the limits. Vehicular ad hoc networks\u0000are one of these areas, and emergency situation warning is one\u0000of their most popular applications since traffic safety\u0000is a concern for everyone. Due to the life-critical nature of\u0000emergency applications, however, it is extremely important to\u0000ensure the solutions proposed meet the standards required,\u0000such as reliable and timely delivery of the safety\u0000warning in a situation like car collision avoidance. In order to put\u0000the candidate solutions to the test and evaluate their feasibility,\u0000we adopt the approach of computer simulation. We implement\u0000four different selective broadcast algorithms used for information\u0000dissemination in vehicular ad hoc networks, and compare their\u0000performance under identical realistic simulation conditions.\u0000Our goal is to provide an evaluation focussing on\u0000the performance with respect to safety, rather than to network aspects like throughput, loss, and delay. We\u0000define four new performance criteria to address the effectiveness,\u0000efficiency, timeliness, and overhead of the broadcast\u0000algorithms in safety warning delivery. The results we\u0000obtain using these criteria help us to understand better the\u0000design requirements of a high-performance selective broadcast\u0000algorithm.","PeriodicalId":269774,"journal":{"name":"International Journal of Vehicular Technology","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114124250","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 22
Comparison of PMAC Machines for Starter-Generator Application in a Series Hybrid-Electric Bus 串联混合动力客车起动发电机用PMAC机的比较
International Journal of Vehicular Technology Pub Date : 2011-04-06 DOI: 10.1155/2011/275785
S. Jurkovic, E. Strangas
{"title":"Comparison of PMAC Machines for Starter-Generator Application in a Series Hybrid-Electric Bus","authors":"S. Jurkovic, E. Strangas","doi":"10.1155/2011/275785","DOIUrl":"https://doi.org/10.1155/2011/275785","url":null,"abstract":"This paper presents a comparative study of outer rotor PMAC machine candidates for starter-generator application in hybrid bus with series power train configuration. PMAC machines with interior and surface mount permanent magnets are considered and compared, although a complete analysis is only carried out for the SPM. Different design aspects such as concentrated versus distributed windings as well as interior and exterior rotor structures are evaluated. Different slot numbers per pole per phase configurations for concentrated winding PMAC machines are also examined. Comparison and evaluation of the machines is based on their performance which included evaluation of winding and iron losses, magnet losses, and maximum torque capability as well as the size and weight of the machines.","PeriodicalId":269774,"journal":{"name":"International Journal of Vehicular Technology","volume":"28 9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124292395","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Time in privacy preserving LBSs: an overlooked dimension 保护lbs隐私的时间:一个被忽视的维度
International Journal of Vehicular Technology Pub Date : 2011-03-29 DOI: 10.1155/2011/486975
L. Marconi, R. D. Pietro, B. Crispo, M. Conti
{"title":"Time in privacy preserving LBSs: an overlooked dimension","authors":"L. Marconi, R. D. Pietro, B. Crispo, M. Conti","doi":"10.1155/2011/486975","DOIUrl":"https://doi.org/10.1155/2011/486975","url":null,"abstract":"A new privacy model for Location-Based Services (LBSs) has been recently proposed based on users' footprints-these being a repre-sentation of the amount of time a user spends in a given area. Unfortunately, while the model is claimed to be independent from the specific knowledge of the adversary about users' footprints, we argue that an adversary, that has a more structured knowledge over time, can pose a threat to the privacy guarantees of the model. The major contribution of this paper is to show that time is a relevant dimension that needs to be taken into consideration when investigating LBSs privacy issues. In particular, we show that applying our considerations, user privacy can be violated. We support our claim with analysis and a concrete example. Furthermore, by analyzing a real data set of vehicular traces, we show that the threat is actually present in a real scenario and that its effect on jeopardizing user privacy is relevant.","PeriodicalId":269774,"journal":{"name":"International Journal of Vehicular Technology","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131807011","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Spectrum Sensing for Cognitive Vehicular Networks over Composite Fading 基于复合衰落的认知车辆网络频谱感知
International Journal of Vehicular Technology Pub Date : 2011-03-02 DOI: 10.1155/2011/630467
H. Rasheed, N. Rajatheva
{"title":"Spectrum Sensing for Cognitive Vehicular Networks over Composite Fading","authors":"H. Rasheed, N. Rajatheva","doi":"10.1155/2011/630467","DOIUrl":"https://doi.org/10.1155/2011/630467","url":null,"abstract":"Recent advancement in vehicular wireless applications \u0000is also a major contributing factor in spectrum scarcity. \u0000Cognitive radio system is a mechanism which allows unlicensed \u0000cognitive users (CUs) to utilize idle unused bands. Fast and \u0000reliable detection of primary legacy user is the key component of \u0000cognitive radio networks. However, hidden terminal and low SNR \u0000problems due to shadow fading put fundamental limit to the sensing \u0000performance and practical entailments in design of the cognitive \u0000vehicular networks. Extensive modeling is being carried out to \u0000specify varying channel characteristics, particularly multipath \u0000fading and shadowing. Energy detection-(ED-) based spectrum \u0000sensing is a viable choice for many vehicle-to-vehicle (V2V) \u0000and vehicle to-road-side infrastructure (V2I) communications. \u0000This paper examines the performance of spectrum sensing \u0000using ED over Gamma-shadowed Nakagami-m composite fading \u0000channel to cater for both small-and-large scale fading. The \u0000results highlight the notable impact of shadowing spread and \u0000fading severity on detection performance. The relevant simulation \u0000results are presented to support our analytical results for average \u0000detection probability. Furthermore, these results are investigated \u0000and compared to other compound and classical channels.","PeriodicalId":269774,"journal":{"name":"International Journal of Vehicular Technology","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129473928","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 34
Disseminating a Large Amount of Data to Vehicular Network in an Urban Area 将大量数据传输到城市车辆网络
International Journal of Vehicular Technology Pub Date : 2011-02-10 DOI: 10.1155/2011/627968
M. Taheri, F. Hendesi
{"title":"Disseminating a Large Amount of Data to Vehicular Network in an Urban Area","authors":"M. Taheri, F. Hendesi","doi":"10.1155/2011/627968","DOIUrl":"https://doi.org/10.1155/2011/627968","url":null,"abstract":"The problem of distributing a large amount of data from multiple sources in an urban area is investigated. We explore an opportunistic approach for information collection, in which a vehicle obtains information about resources from encountered vehicles. This protocol could be applied in both dense and sparse vehicular networks. Due to the highly dynamic nature of the underlying vehicular network topology, we depart from architectures requiring centralized coordination, reliable MAC scheduling, or global network state knowledge, and instead adopt a distributed paradigm with simple protocols. In other words, a reliable dissemination is introduced from multiple sources when each node in the network shares a limited amount of its resources for cooperating with others. By using rateless coding at the Road Side Unit (RSU) and using vehicles as data carriers, an efficient way to achieve reliable dissemination to all nodes (even disconnected clusters in the network) is described.","PeriodicalId":269774,"journal":{"name":"International Journal of Vehicular Technology","volume":"221 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121869182","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
The Effect of IntelliDrive on the Efficiency of Highway Transportation Systems 智能驾驶对公路运输系统效率的影响
International Journal of Vehicular Technology Pub Date : 2011-01-24 DOI: 10.1155/2011/653542
M. Nekoui, H. Pishro-Nik, Daiheng Ni
{"title":"The Effect of IntelliDrive on the Efficiency of Highway Transportation Systems","authors":"M. Nekoui, H. Pishro-Nik, Daiheng Ni","doi":"10.1155/2011/653542","DOIUrl":"https://doi.org/10.1155/2011/653542","url":null,"abstract":"Recently, the IntelliDrive initiative has been proposed by the US Department of Transportation (USDOT)\u0000to enhance on-road safety and efficiency. In this study, we provide a mathematical framework which predicts the effect of such technologies on the efficiency of multilane highway systems prior to their real-life deployment. Our study shall encompass mixed traffic conditions in which a variety of assisted, automated and unequipped vehicles coexist. We show that intervehicular communications improves the flow of vehicles by reducing the perception-reaction (P-R) times of drivers and, in some cases, allowing for more efficient lane-changing operations. As we shall see, unlike the latter, the former effect of IntelliDrive on driver P-R time is always there, regardless of the specific traffic conditions.","PeriodicalId":269774,"journal":{"name":"International Journal of Vehicular Technology","volume":"2011 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131284872","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 12
Verification of the FlexRay Transport Protocol for AUTOSAR In-Vehicle Communications AUTOSAR车载通信FlexRay传输协议验证
International Journal of Vehicular Technology Pub Date : 2010-12-27 DOI: 10.1155/2010/238518
S. Gordon, San Choosang
{"title":"Verification of the FlexRay Transport Protocol for AUTOSAR In-Vehicle Communications","authors":"S. Gordon, San Choosang","doi":"10.1155/2010/238518","DOIUrl":"https://doi.org/10.1155/2010/238518","url":null,"abstract":"The FlexRay Transport Protocol (FrTp) is designed to support reliable and efficient communication between various computers embedded in vehicles. It uses a standardised FlexRay communication bus and introduces a go-back-N style retransmission algorithm. A formal modelling language, Coloured Petri nets (CPN), has been applied to verify the protocol design. Separate CPN models of the FrTp service and protocol are developed and with state space analysis-used to prove for selected configurations that FrTp is deadlock-free and conforms to the service specification when transferring a single-protocol data unit from sender to receiver. In addition, closed-form solutions relating the state space size, retransmission limit, and number of segments are found, giving increased confidence that FrTp is error-free, even for configurations where the state explosion problem arises.","PeriodicalId":269774,"journal":{"name":"International Journal of Vehicular Technology","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115541065","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
A Semi-Deterministic Channel Model for VANETs Simulations 一种用于VANETs模拟的半确定性信道模型
International Journal of Vehicular Technology Pub Date : 2010-11-09 DOI: 10.1155/2012/492105
J. Ledy, H. Boeglen, A. Poussard, B. Hilt, R. Vauzelle
{"title":"A Semi-Deterministic Channel Model for VANETs Simulations","authors":"J. Ledy, H. Boeglen, A. Poussard, B. Hilt, R. Vauzelle","doi":"10.1155/2012/492105","DOIUrl":"https://doi.org/10.1155/2012/492105","url":null,"abstract":"Today's advanced simulators facilitate thorough studies on Vehicular Ad hoc NETworks (VANETs). However the choice of the physical layer model in such simulators is a crucial issue that impacts the results. A solution to this challenge might be found with a hybrid model. In this paper, we propose a semi-deterministic channel propagation model for VANETs called UM-CRT. It is based on CRT (Communication Ray Tracer) and SCME—UM (Spatial Channel Model Extended—Urban Micro) which are, respectively, a deterministic channel simulator and a statistical channel model. It uses a process which adjusts the statistical model using relevant parameters obtained from the deterministic simulator. To evaluate realistic VANET transmissions, we have integrated our hybrid model in fully compliant 802.11 p and 802.11 n physical layers. This framework is then used with the NS-2 network simulator. Our simulation results show that UM-CRT is adapted for VANETs simulations in urban areas as it gives a good approximation of realistic channel propagation mechanisms while improving significantly simulation time.","PeriodicalId":269774,"journal":{"name":"International Journal of Vehicular Technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129383722","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 17
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信