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Explicit Rate Based Transmission Control Scheme in Vehicle-to-lnfrastructure Communication Networks

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China Communications 2014年第1期11卷 46-59页

作者： bi yuanguo Xuemin (Sherman) SHEN ZHAO Hai College of Information Science and Engineering Northeastern University Shenyang 110819 China Shenyang Ligong University Shenyang 110159 China Department of Electrical and Computer Engineering University of Waterloo Waterloo N2L 3G 1 Canada

In Vehicle-to-infrastructure(V2I)communication networks,mobile users are able to access Internet services,such as video streaming,digital map downloading,database access,online gaming,and even safety services like accident alarm,traffic condition broadcast,etc.,through fixed roadside ***,the dynamics of communication environment and frequent changing topology critically challenge the design of an efficient transport layer protocol,which makes it difficult to guarantee diverse Quality of Service(QoS) requirements for various *** this paper,we present a novel transport layer scheme in infrastructure based vehicular networks,and aim to resolve some challenging issues such as source transfer rate adjustment,congestion avoidance,and *** precisely detecting packet losses and identifying various causes of these losses(for example,link disconnection,channel error,packet collision,buffer overflow),the proposed scheme adopts different reacting mechanisms to deal with each of the ***,it timely monitors the buffer size of the bottleneck Road-Side Unit(RSU),and dynamically makes transfer rate feedbacks to source nodes to avoid buffer overflow or ***,analysis and simulation results show that the proposed scheme not only successfully reduces packet losses because of buffer overflow and link disconnection but also improves the utilization efficiency of channel resource.

关键词： transmission control loss differentiation congestion avoidance buffer over- flow vehicle-to-infrastructure communications

End-to-End Rate Adaptation to Support Heterogeneous Services for Infrastructure-Based Vehicular Networks

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ZTE Communications 2014年第1期12卷 3-10页

作者： yuanguo bi Hangguan Shan Xuemin (Sherman) Shen Hai Zhao College of Information Science and Engineering Northeastern University Institute of Information and Communication Engineering Zhejiang University Department of Electrical and Computer Engineering University of Waterloo

Vehicle to Infrastructure （V2I） communications aim to provide mobile users on the road low-cost Internet and driver safety services. However, to meet Quality of Service （QoS） requirements of various applications and officiently utilize limited wireless channel resourc- es, the transport layer protocol has to perform effective rate control in low channel quality and frequent changing topology communica- tion environment. In this paper, we propose a novel rate-control scheme in infrastructure based vehicular networks that avoids conges- tion and starvation and promotes fairness in end-to-end V2I communications. In vehicular networks, a bottleneck roadside unit （RSU） keeps track of its buffer size, aggregate incoming rate, and link throughput, and appropriately allocates bandwidth to traversing flows. With feedback information from the RSU, source nodes dynamically adjust their sending rates to avoid buffer overflow or starvation at the bottleneck RSU. Simulation results show that the proposed scheme can reduce not only packet losses owing to buffer overflow but also buffer starvation time, which improves the utilization efficiency of wireless channel resource.

关键词： vehicle to infrastructure communications roadside unit congestion avoidance starvation avoidance transport layer

Scheduling algorithms for time-constrained big-le transfers in the Internet of Vehicles

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Journal of Communications and Information Networks 2017年第2期2卷 126-135页

作者： Chuan Lin yuanguo bi Hai Zhao Zeshen Wang Jinfa Wang School of Computer Science and Engineering Northeastern UniversityShenyang 110819China School of Business Administration Northeastern UniversityShenyang 110819China

In order to transfer large les and provide high-quality services in the IoV(Internet of Vehicles),intelligent routing and scheduling are indispensable for fast transfers and effcient network utilization,particularly when multi-path routing is allowed in the ***,a network administrator must select a set of feasible paths over which the transfer can be *** consider a TBTS(Time-constrained big-le Transfer Scheduling)problem in this *** prove that TBTS problem is NP-hard and that the TBTS problem can be solved by addressing a corresponding maximum ow over time problem with multi-path routing *** then propose both a heuristic algorithm(TBTS-H)and an exact algorithm(TBTS-A)to solve the TBTS *** both of the proposed approaches can solve the TBTS problem,the heuristic runs more effciently by trading accuracy for delay,while the exact algorithm can achieve high accuracy for delay,at the cost of increased *** corresponding simulation results illustrate this ***,we conduct some comparisons between our proposed approaches and a traditional single-path routing scheme.

关键词： Internet of Vehicles wired-transfer time-constrained big-le scheduling multi-path routing

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基于路径混淆的实时轨迹隐私保护方法

计算机工程与应用 2024年第2期60卷 288-294页

作者：李凤云郭昊毕远国李亦宁东北大学计算机科学与工程学院沈阳110169 网络文化与数字传播北京市重点实验室北京110101 曼尼托巴大学科学学院加拿大曼尼托巴温尼伯MBR3T 2N2

由于传统的轨迹隐私保护算法在处理实时问题时的局限性,针对实时轨迹的隐私保护处理提出了基于路径混淆的轨迹隐私保护算法。该算法能够解决传统路径混淆算法中出现的轨迹数据不足和轨迹数据可用性的问题。利用车辆自适应时间窗口算法... 详细信息

由于传统的轨迹隐私保护算法在处理实时问题时的局限性,针对实时轨迹的隐私保护处理提出了基于路径混淆的轨迹隐私保护算法。该算法能够解决传统路径混淆算法中出现的轨迹数据不足和轨迹数据可用性的问题。利用车辆自适应时间窗口算法对车辆轨迹进行分组选择,通过混淆算法提高轨迹的隐私保护效果,在混淆过程中目标车辆与周围车辆形成混淆组从而达到多轨迹的真假混淆情况。通过对比实验分析了轨迹数据的可用性,验证所提出算法比其他传统方法在车辆隐私保护方面效果更好,且混淆后轨迹数据可用性更高。

关键词：轨迹隐私保护路径混淆差分隐私区域划分

Histones of Neutrophil Extracellular Traps Induce CD11b Expression in Brain Pericytes Via Dectin-1 after Traumatic Brain Injury

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Neuroscience Bulletin 2022年第10期38卷 1199-1214页

作者： Yang-Wuyue Liu Jingyu Zhang Wanda bi Mi Zhou Jiabo Li Tiantian Xiong Nan Yang Li Zhao Xing Chen yuanguo Zhou Wenhui He Teng Yang Hao Wang Lunshan Xu Shuang-Shuang Dai Department of biochemistry and Molecular biology School of Basic MedicineArmy Medical UniversityChongqing400038China Department of Neurosurgery Daping HospitalArmy Medical UniversityChongqing400042China Molecular biology Center State Key Laboratory of TraumaBurnand Combined InjuryDaping HospitalArmy Medical UniversityChongqing400042China Department of Pathophysiology College of High Altitude MedicineArmy Medical UniversityChongqing400038China Brigade 1 of Medical Undergraduates School of Basic MedicineArmy Medical UniversityBattalion 1Chongqing400038China

The brain pericyte is a unique and indispensable part of the blood-brain barrier(BBB),and contributes to several pathological processes in traumatic brain injury(Tbi).However,the cellular and molecular mechanisms by which pericytes are regulated in the damaged brain are largely ***,we show that the formation of neutrophil extracellular traps(NETs)induces the appearance of CD11b^(+)pericytes after *** CD11b^(+)pericyte subsets are characterized by increased permeability and pro-inflammatory profiles compared to ***,histones from NETs by Dectin-1 facilitate CD11b induction in brain pericytes in PKC-c-Jun dependent manner,resulting in neuroinflammation and BBB dysfunction after *** data indicate that neutrophil-NET-pericyte and histone-Dectin-1-CD11b are possible mechanisms for the activation and dysfunction of *** NETs formation and Dectin-1 are promising means of treating Tbi.

关键词： Pericyte Neutrophil Tbi NET Dectin-1

bi-level Capacitated Location-allocation Problem in Uncertain Environment

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Bi-level Capacitated Location-allocation Problem in Uncertai...

基于蛙人探测声纳序列图像的水下小目标检测算法

第五届中国不确定系统年会

作者： Jiucun Yao yuanguo Zhu Department of Applied Mathematics Nanjing University of Science and Technology Nanjing 210094,Jiangsu

＜正＞Location-Allocation（LA）Problem is to lo- cate a set of facilities such that the transportation cost from facilities to customers is *** problem has been studied by many researchers in ran- dom and fuzzy fields for its general practical applica- ***,facilities may supply different lev- els such as hi-level LA *** this paper,we consider bi-level capacitated LA problem in uncertain environment（BLCLAU）.In BLCLAU,the parameters of demands level are all uncertain *** or- der to solve BLCLAU,we introduces EVM model of BLCLAU,and gives the solution of EVM by a hy- brid intelligent method combining fuzzy simulation and guided evolution simulation algorithm（GESA）to- gether,discussed.

关键词： bi-level capacitated location-allocation fuzzy variable intelligent algorithm

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传感技术学报 2011年第7期24卷 1027-1032页

作者：毛盾刘忠程远国海军工程大学电子工程学院武汉430033

针对水下监控系统的小目标检测问题,在分析蛙人探测声纳成像特点的基础上,提出了基于图像二值化和区域生长法的自适应双帧差法。通过将双帧差结果与当前帧的二值化图像进行"与"运算来消除"双影",然后采用区域生长法消除"空洞",最后根据... 详细信息

针对水下监控系统的小目标检测问题,在分析蛙人探测声纳成像特点的基础上,提出了基于图像二值化和区域生长法的自适应双帧差法。通过将双帧差结果与当前帧的二值化图像进行"与"运算来消除"双影",然后采用区域生长法消除"空洞",最后根据检测结果自适应地调整阈值。克服了三帧法和累积帧差法在处理空洞和双影问题时存在较长时延的缺陷,提高了水下低信噪比环境下对小目标的检测能力。实验证明了该算法的有效性。

关键词：自动目标检测蛙人探测声纳差分图像法区域生长法自适应阈值

政府整体绩效评价指标的权重设计及实证检验——以广东省为例

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甘肃行政学院学报 2009年第3期 53-59页

作者：郑方辉华元果毕紫微华南理工大学公共政策评价中心广州510640

在我国地方政府的整体绩效评价的技术体系中,指标权重的设计路径与结果受到普遍关注。本文依据既定(作为层次分析法特例)的概念模型,参照专家咨询调查统计结果确定指标权重分配的技术方案,将其运用于广东全省21个地级以上市及121个县级... 详细信息

在我国地方政府的整体绩效评价的技术体系中,指标权重的设计路径与结果受到普遍关注。本文依据既定(作为层次分析法特例)的概念模型,参照专家咨询调查统计结果确定指标权重分配的技术方案,将其运用于广东全省21个地级以上市及121个县级政府的绩效评价中。论文就多种权重分配方案对评价结果的影响进行比较检验,旨在完善我国地方政府整体绩效评价技术体系的科学性和适用性。

关键词：政府整体绩效评价技术体系指标权重设计与检验

纤维状催化剂ACF吸附SO_2动力学的研究——ACF研究之三

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西南民族学院学报（自然科学版） 1997年第3期23卷 271-274页

作者：刘兴利西南民族学院化学系

对纤维状催化剂ＡＣＦ吸附ＳＯ２动力学进行了探讨，结果表明：ＡＣＦ吸附速度快、吸附平衡时间短、平衡吸附量大；其结构变化对吸附动力学有影响；Ｂａｎｇｈａｍ和Ｌａｎｇｍｕｉｒ吸附速度方程在ＡＣＦ对ＳＯ２吸附体系有一定的适用性．

关键词：纤维状催化剂 ACF 吸附二氧化硫大气污染