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Jointly beam stealing attackers detection and localization without training:an image processing viewpoint

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Frontiers of Computer Science 2023年第3期17卷 145-160页

作者： Yaoqi YANG xianglin wei Renhui XU weizheng WANG Laixian PENG Yangang WANG College of Communication Engineer Army Engineering University of PLANanjing 210000China The 63rd Research Institute National University of Defense TechnologyNanjing 210007China Department of Computer Science City University of Hong KongHong Kong 999077China

Recently revealed beam stealing attacks could greatly threaten the security and privacy of IEEE 802.11ad *** premise to restore normal network service is detecting and locating beam stealing attackers without their *** consistency-based methods are only valid for one single attacker and are *** the viewpoint of image processing,this paper proposes an algorithm to jointly detect and locate multiple beam stealing attackers based on RSSI(Received Signal Strength Indicator)map without the training process involved in deep learning-based ***,an RSSI map is constructed based on interpolating the raw RSSI data for enabling high-resolution localization while reducing monitoring ***,three image processing steps,including edge detection and segmentation,are conducted on the constructed RSSI map to detect and locate multiple attackers without any prior knowledge about the *** evaluate our proposal’s performance,a series of experiments are conducted based on the collected *** results have shown that in typical parameter settings,our algorithm’s positioning error does not exceed 0.41 m with a detection rate no less than 91%.

关键词： beam-stealing attacks detection localization image processing

SDNMS: A Software Defined Network Measurement System for NFV Networks

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China Communications 2019年第4期16卷 59-74页

作者： Tianqi Zhang Ming Chen xianglin wei Bing Chen Chao Hu School of Computer Science and Technology Nanjing University of Aeronautics and Astronautics PLA University of Science and Technology Nanjing Telecommunication Technology Research Institute

As a promising technology to completely transform how we architect, deploy, operate and manage various networks, software-based Network Function Virtualization(NFV) enables hardware-independent, flexible, fast and efficient network service provision. With the increasing popularity of NFV paradigm, the Internet has also transformed to be a hybrid environment where NFV-based network entities coexist with traditional network devices. To facilitate our understanding, design, evaluate and manage of such novel network environment, there is a great need for a new NFV-compatible network measurement system which is still in absent so far. To bridge this gap, a system, named Software Defined Network Measurement System(SDNMS), is presented in this paper. Firstly, the architecture of SDNMS is proposed. In this architecture, a formal method to describe the working mode of the network measurement is defined. This method can also be utilized to generate a network measurement middle box(NMMB) in a specific location of the NFV network according to the customized description file, and to flexibly deploy the network measurement function. Secondly, the technology of virtual network measurement function(VNMF) combined with LXC is studied to form NMMB function. Thirdly, a control method is presented to control the start, stop, and update NMMB to form a specific network measurement system function. Finally, a prototype of SDNMS with network monitoring function to monitor network performance anomalies and locate faults is introduced. Experimental results have shown that SDNMS architecture and related technologies are feasible and effective to deploy and control network measurement functions in NFV networks. We hope SDNMS could provide a new method for practitioners to conduct network management and research at the age of NFV.

关键词： network function virtualization network measurement system architecture network measurement function service chain

Onshore-offshore wind energy resource evaluation based on synergetic use of multiple satellite data and meteorological stations in Jiangsu Province,China

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Frontiers of Earth Science 2019年第1期13卷 132-150页

作者： xianglin wei Yuewei DUAN Yongxue LIU Song JIN Chao SUN Department of Geographic Information Science Nanjing UniversityNanjing 210023China Key Laboratory of Coastal Zone Development and Protection Ministry of Land and Resources of ChinaNanjing 210023China Yunnan Transportation Planning and Design Institute Kunming 650200China Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application Nanjing 210023China

The demand for efficient and cost-effective renewable energy is increasing as traditional sources of energy such as oil,coal,and natural gas,can no longer satisfy growing global energy *** renewable energies,wind energy is the most prominent due to its low, manageable impacts on the local *** on meteorological data from 2006 to 2014 and multi-source satellite data (i.e.,Advanced Scatterometer,Quick Scatterometer,and Windsat)from 1999 to 2015,an assessment of the onshore and offshore wind energy potential in Jiangsu Province was performed by calculating the average wind speed,average wind direction,wind power density, and annual energy production (AEP).Results show that Jiangsu has abundant wind energy resources,which increase from inland to coastal ***-onshore areas, wind power density is predominantly less than 200 W/m^2, while in offshore areas,wind power density is concentrates in the range of 328-500 W/m^*** areas comprise more than 13,573.24 km^2,mainly located in eastern coastal regions with good wind farm potential The total wind power capacity in onshore areas could be as much as 2.06×10^5 ***,offshore wind power generation in Jiangsu Province is calculated to reach 2×10^6 GWh, which is approximately four times the electricity demand of the entire Jiangsu *** study validates the effective application of Advanced Scatterometer,Quick Scatterometer,and Windsat data to coastal wind energy monitoring in ***,the methodology used in this study can be effectively applied to other similar coastal zones.

关键词： wind energy resource wind power density ASCAT QuikSCAT Windsat

Churn-Resilient Task Scheduling in a Tiered IoT Infrastructure

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China Communications 2019年第8期16卷 162-175页

作者： Jianhua Fan xianglin wei Tongxiang Wang Tian Lan Suresh Subramaniam Nanjing Telecommunication Technology Research Institute Nanjing210007China George Washington University Washington DC20052US

Cloud-as-the-center computing paradigms face multiple challenges in the 5G and Internet of Things scenarios, where the service requests are usually initiated by the end-user devices located at network edge and have rigid time constraints. Therefore, Fog computing, or mobile edge computing, is introduced as a promising solution to the service provision in the tiered IoT infrastructure to compensate the shortage of traditional cloud-only architecture. In this cloud-to-things continuum, several cloudlet or mobile edge server entities are placed at the access network to handle the task offloading and processing problems at the network edge. This raises the resource scheduling problem in this tiered system, which is vital for the promotion of the system efficiency. Therefore, in this paper, a scheduling mechanism for the cloudlets or fog nodes are presented, which takes the mobile tasks’ deadline and resources requirements at the same time while promoting the overall profit of the system. First, the problem at the cloudlet, to which IoT devices offload their tasks, is formulated as a multi-dimensional 0-1 knapsack problem. Second, based on ant colony optimization, a scheduling algorithm is presented which treat this problem as a subset selection problem. Third, to promote the performance of the system in the dynamic environments,a churn-refined algorithm is further put forward. A series of simulation experiments have shown that out proposal outperforms many state-of-the-art algorithms in both profit and guarantee ratio.

关键词： fog computing task scheduling deadline constrained internet of things ant colony optimization

Distributed Matching Theory-Based Task Re-Allocating for Heterogeneous Multi-UAV Edge Computing

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China Communications 2024年第1期21卷 260-278页

作者： Yangang Wang xianglin wei Hai Wang Yongyang Hu Kuang Zhao Jianhua Fan College of Communications Engineering Army Engineering University of PLANanjing 210007China The Sixty-Third Research Institute National University of Defense TechnologyNanjing 210007China

Many efforts have been devoted to efficient task scheduling in Multi-Unmanned Aerial Vehicle(UAV)edge ***,the heterogeneity of UAV computation resource,and the task re-allocating between UAVs have not been fully considered ***,most existing works neglect the fact that a task can only be executed on the UAV equipped with its desired service function(SF).In this backdrop,this paper formulates the task scheduling problem as a multi-objective task scheduling problem,which aims at maximizing the task execution success ratio while minimizing the average weighted sum of all tasks’completion time and energy *** three coupled goals in a realtime manner with the dynamic arrival of tasks hinders us from adopting existing methods,like machine learning-based solutions that require a long training time and tremendous pre-knowledge about the task arrival process,or heuristic-based ones that usually incur a long decision-making *** tackle this problem in a distributed manner,we establish a matching theory framework,in which three conflicting goals are treated as the preferences of tasks,SFs and ***,a Distributed Matching Theory-based Re-allocating(DiMaToRe)algorithm is put *** formally proved that a stable matching can be achieved by our *** simulation results show that Di Ma To Re algorithm outperforms benchmark algorithms under diverse parameter settings and has good robustness.

关键词： edge computing heterogeneity matching theory service function unmanned aerial vehicle

Teaching Reform on PLC Courses Research on the Project-based Integrated Teaching

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Teaching Reform on PLC Courses Research on the Project-base...

NEW APPROACH OF STEREO CORRESPONDENCE

第5届教育教学改革与管理工程学术年会

作者： Longfei FU xianglin wei Xiaosuo WU Yongqing YANG College of Technology and Engineering. Lanzhou University of Technology School of Electric Engineering and Information Engineering. Lanzhou University of Technology School of Physical Science and Technology Lanzhou University School of Electronic and Information Engineering. Lanzhou Jiaotong University

This paper mainly describes the teaching background of PLC course, and the urgency of teaching reform. The article presents and describes the connotation and denotation of the Project Integrated Teaching, and research on teaching reform of the PLC course. That introduces specific measures for reform of the Project-based Integrated Teaching and methods.

关键词： PLC Teaching Reform Project Integrated

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Journal of Electronics(China) 1995年第3期12卷 249-258页

作者：李象霖魏永斌张妙兰 Graduate School USTC Academia Sinica Beijing 100039

One can select feature points as matching character by using disparity estimation method, under satisfying the condition of certain matching theorem. Then we can obtain a constraint minimum energy function. By using simulated annealing (SA) algorithm and a lot of simulation experiments, the energy function can escape local minimum, then stereo correspondence can be realized.

关键词： Stereo correspondence Stereo matching Disparity estimation Simulated annealing

基于Simulink的异步电机DTC系统的详细建模与仿真

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微电机 2014年第12期47卷 76-80,84页

作者：魏祥林兰州理工大学电气工程与信息工程学院兰州730050

运用电机空间矢量分析法详细推导了异步电机电磁转矩的空间矢量表达式,剖析了电磁转矩产生的物理机理,说明了转矩系数与空间矢量定义系数的对应关系;以异步电机直接转矩控制(DTC)的基本原理和系统结构为基础,搭建了异步电机直接转矩(DTC... 详细信息

运用电机空间矢量分析法详细推导了异步电机电磁转矩的空间矢量表达式,剖析了电磁转矩产生的物理机理,说明了转矩系数与空间矢量定义系数的对应关系;以异步电机直接转矩控制(DTC)的基本原理和系统结构为基础,搭建了异步电机直接转矩(DTC)控制系统的Simulink仿真模型;仿真结果证明所建异步电机DTC系统仿真模型正确、参数设置合理,同时反映出DTC系统动态响应迅速、存在转矩和磁链脉动等性能特点。

关键词：电磁转矩表达式空间矢量异步电机直接转矩控制

随机啮合参数下辊轧机传动系统动力学特性分析

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锻压技术 2019年第6期44卷 103-109页

作者：魏香林梁柱广东创新科技职业学院机电工程系

建立了斜齿6自由度齿轮弯-扭-轴耦合的辊轧机传动系统模型,使用变步长4阶Runge-Kutta数值积分法,对含有时变啮合刚度激励、传动误差激励以及齿侧间隙激励的传动系统动力学模型进行数值分析,得到辊轧机传动系统的动态响应过程。研究结果... 详细信息

建立了斜齿6自由度齿轮弯-扭-轴耦合的辊轧机传动系统模型,使用变步长4阶Runge-Kutta数值积分法,对含有时变啮合刚度激励、传动误差激励以及齿侧间隙激励的传动系统动力学模型进行数值分析,得到辊轧机传动系统的动态响应过程。研究结果表明:时变啮合刚度激励、传动误差激励以及齿侧间隙激励的随机性引起齿轮传动系统不同程度的位移振动,并且振动位移均值及均方差随着随机间隙的离散程度增加而增大;由于从动齿侧处于传动系统末端,承受负载大,因此,从动齿侧的振动位移均值及均方差大于主动齿轮的振动位移均值及均方差。该研究为辊轧机传动系统的工程设计提供了参考。

关键词：辊轧机传动系统动态特性啮合刚度传动误差齿侧间隙