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A macroscopic traffic model based on weather conditions

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Chinese Physics B 2018年第7期27卷 179-189页

作者： Zawar H.Khan Syed Abid Ali Shah t.aaron gulliver Department of Electrical Engineering University of Engineering and TechnologyPeshawarPakistan Department of Electrical and Computer Engineering University of VictoriaPO Box 1700STN CSCVictoriaBC Canada

A traffic model based on the road surface conditions during adverse weather is presented. the surface of a road is affected by snow, compacted snow, and ice, which affects the traffic behavior. In this paper, a new macroscopic traffic flow model based on the transition velocity distribution is proposed which characterizes traffic alignment under adverse weather conditions. two examples are considered to illustrate the effect of the transition velocity behavior on traffic velocity and density. Simulation results are presented which show that this model provides a more accurate characterization of traffic flow behavior than the well known Payne-Whitham model. the proposed model can be used to reduce accidents and improve road safety during adverse weather conditions.

关键词： macroscopic traffic flow anticipation Payne-Witham (PW) model adverse weather

SELECtED PAPERS FROM IEEE/CIC ICCC 2018

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China Communications 2019年第9期16卷 15-17页

作者： Zhiyong Feng Shuguang Cui t. aaron gulliver Zhiqing Wei BUPt Beijing Peoples R China Stanford Univ Elect Engn Stanford CA 94305 USA Univ Victoria Elect Engn Victoria BC Canada Carleton Univ Acad Appointments Ottawa ON Canada Univ Canterbury Christchurch New Zealand

IEEE/CIC International Conference on Communication in China(ICCC)is one of the flagship conferences in Asian-Pacific region held by IEEE Communication Society(ComSoc)and China Institute of Communication(CIC).IEEE/CIC ICCC 2018 was held in Beijing,China,on August 16-18,*** key theme is“Ubiquitous Network,Intelligence and Society”,which broadly covers the theoretical and practical innovations in the area of *** technical program of IEEE/CIC ICCC 2018 features 6 world-class keynote speeches which are presented by Weihua Zhuang(Fellow of IEEE,Royal Society of Canada,Canadian Academy of Engineering,and Engineering Institute of Canada),Abbas Jamalipour(Fellow of IEEE,IEICE,and Institution of Engineers Australia),tao Zhang,Ying-Chang Liang(IEEE Fellow),James Kimery,and Sumei Sun(IEEE Fellow).

关键词： Canada Intelligence Institution

An Energy-Efficient MAC Protocol for Ad Hoc Networks

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Wireless Sensor Network 2009年第5期1卷 407-416页

作者： Yongsheng SHI t. aaron gulliver 不详

A mobile ad hoc network (MANEt) is a collection of nodes equipped with wireless communications and a networking capability without central network control. Nodes in a MANEt are free to move and organize themselves in an arbitrary fashion. Energy-efficient design is a significant challenge due to the characteristics of MANEts such as distributed control, constantly changing network topology, and mobile users with limited power supply. the IEEE 802.11 MAC protocol includes a power saving mechanism, but it has many limitations. A new energy-efficient MAC protocol (EE-MAC) is proposed in this paper. It is shown that EE-MAC performs better than IEEE 802.11 power saving mode and exceeds IEEE 802.11 with respect to balancing network throughput and energy savings.

关键词： Energy-Efficient MAC Protocol IEEE 802.11 Ad Hoc Networks

基于单基站天线阵列的超宽带定位AOA估计方法

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电子与信息学报 2013年第8期35卷 2024-2028页

作者：张浩刘兴 gulliver t A 崔学荣中国海洋大学信息科学与工程学院青岛266100 维多利亚大学电子与计算机工程学院

该文提出一种基于单基站六角单极定向天线阵列的到达角(Angle Of Arrival,AOA)估计方法,用于超宽带(UWB)室内精确定位。该文设计的AOA估计方法是通过测量各天线接收脉冲幅度信息,结合加入了动态参数的天线阵列的波束方向图,从而获得AOA... 详细信息

该文提出一种基于单基站六角单极定向天线阵列的到达角(Angle Of Arrival,AOA)估计方法,用于超宽带(UWB)室内精确定位。该文设计的AOA估计方法是通过测量各天线接收脉冲幅度信息,结合加入了动态参数的天线阵列的波束方向图,从而获得AOA,避免了传统多基站定位系统中采用测量脉冲到达时间差的方法带来的部署困难以及精度不足问题。仿真结果显示,使用该文提出的AOA估计方法,估计误差小于1°的概率可达到96%,在IEEE802.15.4a CM3信道下,当定位距离为10 m时,定位误差小于15 cm的概率可达80%。因此,基于该文单基站AOA估计方法的UWB定位系统部署简单,并且可提供精确的定位精度,是一种有效的定位方法。

关键词：超宽带定位单基站天线阵列脉冲幅度

Range-Based Localization in Wireless Networks Using Density-Based Outlier Detection

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Wireless Sensor Network 2010年第11期2卷 807-814页

作者： Khalid K. Almuzaini aaron gulliver 不详

Node localization is commonly employed in wireless networks. For example, it is used to improve routing and enhance security. Localization algorithms can be classified as range-free or range-based. Range-based algorithms use location metrics such as toA, tDoA, RSS, and AoA to estimate the distance between two nodes. Proximity sensing between nodes is typically the basis for range-free algorithms. A tradeoff exists since range-based algorithms are more accurate but also more complex. However, in applications such as target tracking, localization accuracy is very important. In this paper, we propose a new range-based algorithm which is based on the density-based outlier detection algorithm (DBOD) from data mining. It requires selection of the K-nearest neighbours (KNN). DBOD assigns density values to each point used in the location estimation. the mean of these densities is calculated and those points having a density larger than the mean are kept as candidate points. Different performance measures are used to compare our approach with the linear least squares (LLS) and weighted linear least squares based on singular value decomposition (WLS-SVD) algorithms. It is shown that the proposed algorithm performs better than these algorithms even when the anchor geometry about an unlocalized node is poor.

关键词： Localization Positioning Ad Hoc Networks Range-Based Wireless Sensor Network Outlier Detection Clustering

移动车-车通信系统在n-Rayleigh信道下的性能分析

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应用科学学报 2015年第4期33卷 367-375页

作者：徐凌伟张浩魏兆强 gulliver t A 中国海洋大学信息科学与工程学院山东青岛266100 加拿大维多利亚大学电子与计算机工程学院

在n-Rayleigh信道下,研究了使用最大比合并接收的移动车-车通信系统的平均符号误码率和中断概率性能.基于特征函数方法,推导了移动车-车通信系统在n-Rayleigh衰落信道上采用相移键控调制、正交幅度调制、脉冲幅度调制等方式的平均符号... 详细信息

在n-Rayleigh信道下,研究了使用最大比合并接收的移动车-车通信系统的平均符号误码率和中断概率性能.基于特征函数方法,推导了移动车-车通信系统在n-Rayleigh衰落信道上采用相移键控调制、正交幅度调制、脉冲幅度调制等方式的平均符号误码率的精确表达式和近似表达式,同时用近似闭合表达式表示中断概率.然后通过数值仿真,验证理论分析的有效性.仿真结果表明,系统的性能可以通过增加分集支路数以及减小衰弱因子来改善.

关键词：最大比合并 n-Rayleigh信道特征函数平均符号误码率中断概率

Unveiling ferroptosis as a promising therapeutic avenue for colorectal cancer and colitis treatment

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Acta Pharmaceutica Sinica B 2024年第9期14卷 3785-3801页

作者： aaron t.Kaoy Christian V.Cabanlongy Kendra Padilla Xiang Xue Department of Biochemistry and Molecular Biology University of New MexicoAlbuquerqueNM 87131USA

Ferroptosis is a novel type of regulated cell death(RCD)involving iron accumulation and lipid *** its discovery in 2012,various studies have shown that ferroptosis is associated with the pathogenesis of various *** cell death has also been linked to intestinal dysfunction but can act as either a positive or negative regulator of intestinal disease,depending on the cell type and disease *** continued investigation of mechanisms underlying ferroptosis provides a wealth of potential for developing novel *** the growing prevalence of intestinal diseases,particularly colorectal cancer(CRC)and inflammatory bowel disease(IBD),this review article focuses on potential therapeutics targeting the ferroptotic pathway in relation to CRC and IBD.

关键词： Ferroptosis Colorectal cancer Inflammatory bowel disease Cell death Molecular mechanisms Iron metabolism Drug therapies targeted therapeutics

移动无线传感器网络系统在n-Rayleigh信道下的性能分析

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传感技术学报 2015年第2期28卷 265-270页

作者：徐凌伟张浩吕婷婷施威 gulliver t A 中国海洋大学信息科学与工程学院青岛266100 加拿大维多利亚大学电子与计算机工程学院青岛科技大学信息科学与技术学院青岛266061

在n-Rayleigh信道下,研究了使用选择合并(SC)接收的移动无线传感器网络系统的平均符号误码率(ASEP)和信道容量。基于矩生成函数(MGF)方法,推导了系统采用相干检测的相移键控调制(PSK),正交幅度调制(QAM),脉冲幅度调制(PAM)等数字调制方... 详细信息

在n-Rayleigh信道下,研究了使用选择合并(SC)接收的移动无线传感器网络系统的平均符号误码率(ASEP)和信道容量。基于矩生成函数(MGF)方法,推导了系统采用相干检测的相移键控调制(PSK),正交幅度调制(QAM),脉冲幅度调制(PAM)等数字调制方式的ASEP的精确表达式。同时,也得到了系统信道容量的精确表达式。然后对不同条件下的ASEP和信道容量性能做了数值仿真,理论分析结果与仿真结果相吻合,验证了理论分析结果的正确性。仿真结果表明:随着分集支路数的增加,系统的ASEP和信道容量性能得到了很好的改善,当使用QPSK调制,信噪比为16 d B时,分集支路数L=1,系统的误码率是6×10-2,信道容量是4(bit/s)/Hz;分集支路数L=2,系统的误码率是1×10-2,信道容量是5.1(bit/s)/Hz;分集支路数L=3,系统的误码率是2×10-3,信道容量是5.8(bit/s)/Hz。

关键词：移动无线传感器网络平均符号误码率信道容量选择合并矩生成函数 n-Rayleigh信道

tAS/SEC系统在N-Nakagami信道下的性能分析

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山东大学学报（工学版） 2015年第4期45卷 84-90页

作者：徐凌伟张浩 gulliver t A 中国海洋大学信息科学与工程学院山东青岛266100 维多利亚大学电子与计算机工程学院

为了降低移动设备的硬件复杂度,提出了一种基于发射天线选择和切换检测合并的传输机制。利用信噪比的概率密度函数,分别生成了相移键控调制、正交幅度调制、脉冲幅度调制的矩生成函数,将其进行积分,得到了平均符号误码率的精确表达式。... 详细信息

为了降低移动设备的硬件复杂度,提出了一种基于发射天线选择和切换检测合并的传输机制。利用信噪比的概率密度函数,分别生成了相移键控调制、正交幅度调制、脉冲幅度调制的矩生成函数,将其进行积分,得到了平均符号误码率的精确表达式。将信噪比的概率密度函数进行积分,得到了中断概率的闭合表达式。仿真结果表明,系统的性能可以通过增加发射/接收天线数和衰弱系数、减小衰弱因子来改善。

关键词：发射天线选择切换检测合并 N-Nakagami信道平均符号误码率中断概率