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Intelligent Silent Zone for Source-Location Privacy Based on Context-Awareness in WSNs

Transactions of Nanjing University of Aeronautics and Astronautics 2018年第1期35卷 203-218页

作者： Zhou Qian Qin Xiaolin Ding Youwei College of Computer Science and Technology Nanjing University of Aeronautics and AstronauticsNanjing 211106P.R.China Jiangsu Key Laboratory of Internet of Things and Control Technology Nanjing 211106P.R.China

In many wireless sensor networks(WSNs)applications,the preservation of source-location privacy plays a critical role in concealing context information,otherwise the monitored entities or subjects may be put in *** traditional solutions have been proposed based on the creation of random routes,such as random walk and fake sources approach,which will lead to serious packet delay and high energy *** of applying the routing in a blind way,this article proposes a novel solution for source location privacy in WSNs by utilizing sensor ability of perceiving the presence a mobile attacker nearby,for patient attackers in particular to increase the safety period and decrease the data delivery *** proposed strategy forms an intelligent silent zone(ISZ)by sacrificing only a minority of sensor nodes to entice patient attackers away from real packet routing *** analysis and simulation results show that the proposed scheme,besides providing source location privacy energy efficiently,can significantly reduce real event reporting latency compared with the existing approaches.

关键词： source location privacy wireless sensor networks energy-efficiency context-aware

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Information Model of Radar Communication System and Optimization of Power Allocation

Information Model of Radar Communication System and Optimiza...

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Signal, Information and Data Processing (ICSIDP), IEEE International Conference on

作者： Dan Chen Dazhuan Xu Jiangsu Key Laboratory of Internet of Things and Control Technologies College of Electronic and Information Engineering Nanjing University of Aeronautics and Astronautics 29 Jiangjun Avenue Jiangning District Nanjing People's Republic of China

ISBN: (数字)9781728123455

ISBN: (纸本)9781728123462

Based on the radar communication integration, this paper considers a scene where the radar performs target-detection and then sends the echo information to the control center via a communication link. According to the law of electromagnetic wave propagation, the echo power is inversely proportional to the fourth power of the distance between targets and the radar, while received power at the control center is inversely proportional to the square of the communication distance. It can be seen that shortening the target-radar distance can effectively improve the system's performance. Different from traditional radar communication integration which mainly focused on the integrated signals' and systems' design, this paper innovatively establishes an information model of radar communication system where the performance is evaluated by the location mutual information. Combining with the Shannon channel capacity theorem, an optimized power allocation method under the limited total power is presented to maximize the sensing information obtained by the radar communication system. Numerical results show that the power can be saved by 4dB to 7.8dB under the optimization of the proposed system.

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Automatic Carrier Landing control for Unmanned Aerial Vehicles Based on Preview control

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Transactions of Nanjing University of Aeronautics and Astronautics 2017年第4期34卷 413-419页

作者： Zhen Ziyang Ma Kun Bhatia Ajeet Kumar College of Automation Engineering Nanjing University of Aeronautics and Astronautics Jiangsu Key Laboratory of Internet of Things and Control Technologies

For carrier-based unmanned aerial vehicles(UAVs),one of the important problems is the design of an automatic carrier landing system(ACLS)that would enable the UAVs to accomplish autolanding on the aircraft ***,due to the movements of the flight deck with six degree-of-freedom,the autolanding becomes *** solve this problem,an accurate and effective ACLS is developed,which is composed of an optimal preview control based flight control system and a Kalman filter based deck motion *** preview control fuses the future information of the reference glide slope to improve landing *** reference glide slope is normally a straight ***,the deck motion will change the position of the ideal landing point,and tracking the ideal straight glide slope may cause landing ***,the predictive deck motion information from the deck motion predictor is used to correct the reference glide slope,which decreases the dispersion around the desired landing ***,simulations are carried out to verify the performance of the designed ACLS based on a nonlinear UAV model.

关键词： carrier-based unmanned aerial vehicles optimal preview control automatic carrier landing system deck motion predictor

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Adaptive Fault-Tolerant control of A Two-car High-speed Train Model with Inter-car Flexible Link and Traction Actuator Failures*

Adaptive Fault-Tolerant Control of A Two-car High-speed Trai...

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Asian control Conference

作者： Zehui Mao Gang Tao Bin Jiang Xing-Gang Yan Yali Xue Ministry of Industry and Information Technology and Jiangsu Key Laboratory of Internet of Things and Control Technologies (NUAA) Key Laboratory of Navigation Control and Health Management Technologies of Advanced Aircraft (NUAA) Department of Electrical and Computer Engineering University of Virginia Charlottesville VA USA School of Engineering and Digital Arts University of Kent Canterbury United Kingdom

ISBN: (纸本)9781728102634

This paper studies the adaptive fault-tolerant tracking control problem for the high-speed trains with intercar flexible link and traction actuator failures. This study is focused on a benchmark model which, as a main dynamic unit of the CRH (China Railway High-speed) train, is a two-car dynamic system with a flexible link between two cars, for which the input acts on the second car and the output is the speed of the first car. This model is under parameter uncertainties and subject to uncertain actuator failures. For such an underactuated system, to ensure the first car tracking a desired speed trajectory, a coordinate transformation method is employed to decompose the system model into a control dynamics subsystem and a zero dynamics subsystem. Stability analysis is conducted to show that such a zero dynamic system is Lyapunov stable and is partially input-to-state stable. An adaptive fault-tolerant controller is developed which is able to ensure the closed-loop system signal boundedness and desired speed tracking, in the presence of the actuator failures and unknown system parameters. Simulation results from a realistic train dynamic model are presented to verify the effectiveness of the adaptive controller.

关键词： Automobiles Actuators Fault tolerance Fault tolerant systems Adaptation models Aerodynamics Adaptive systems

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Simultaneous estimation of system states and identification of time-varying parameters for discrete-time systems via iterative learning estimation

Simultaneous estimation of system states and identification ...

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第三十八届中国控制会议

作者： Ruitian Yang Li Peng Yongqing Yang Fengzeng Zhu Engineering Research Center of Internet of Things Applied Technology (School of IoT Engineering Jiangnan University) Ministry of Education Jiangsu Province Internet of Things Application Technology Key Construction Laboratory Wuxi Taihu College School of Science Key Laboratory of Advanced Process Control for Light Industry (Ministry of Education) School of Science Jiangnan University

In this paper, the state estimation problem and identifying time-varying parameters are investigated for discrete-time systems with time delays. The time delays comprise both state delay and measurement delay. A novel iterative learning estimator which is utilized to eliminate the effects of state delay and measurement delay is presented for the general systems. The main idea on the design of the iterative learning estimator is to combine the previous information into the proposed estimator for identifying time-varying parameters in real time by the use of learning. The sufficient conditions for the solvability of the addressed problem are obtained in terms of certain linear matrix inequalities(LMIs). An explicit expression of the desired iterative learning estimator is also given. Finally, a numerical example is provided to demonstrate the effectiveness and applicability of the proposed design approach.

关键词： State estimation Parameters identification Discrete-time systems Iterative learning estimator

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Research and Application on Highway Traffic Index System 18

Research and Application on Highway Traffic Index System

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18th COTA International Conference of Transportation Professionals: Intelligence, Connectivity, and Mobility, CICTP 2018

作者： Zheng, Yuan Ran, Bin Lu, Zhengfeng Qu, Xu Zhang, Jian Jiangsu Key Laboratory of Urban ITS Southeast Univ. Jiangsu Province Collaborative Innovation Center of Modern Urban Traffic Technologies Si Pai Lou #2 Nanjing Jiangsu210096 China School of Transportation Southeast Univ. Collaborative Innovation Center for Technology and Application of Internet of Things China Research Center for Internet of Mobility Southeast Univ. Collaborative Innovation Center for Technology and Application of Internet of Things China

ISBN: (数字)9780784481523

ISBN: (纸本)9780784481523

To evaluate highway traffic operation conditions, this paper researches and applies the highway traffic index. Data were used from the I-880N highway with location 401240 in California, United States. Cross correlation analysis was applied to divide the highway traffic state. Then k-means clustering and quest decision tree model were used to determine the specific value of highway traffic index. Results show that highway traffic index is divided into five levels: smooth, basic smooth, mild congestion, moderate congestion, and severe congestion. The five levels are quantified as (0-2), (2-4), (4-6), (6-8), and (8-10);the division threshold of traffic density at each level is 21.93, 34.82, 41.09, 58.00, and 75.35pcu/mile/lane respectively;color classifications are green, light green, light yellow, yellow, and red;real-time release and release cycle selected based on actual situation. This study establishes a highway traffic index system and provides a theoretical basis for follow-up application. © 2018 American Society of Civil Engineers.

关键词： K-means clustering

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A Methodology for Identifying Urban Traffic Corridors Using Big Data of Cell Phone Trajectory 18

A Methodology for Identifying Urban Traffic Corridors Using ...

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18th COTA International Conference of Transportation Professionals: Intelligence, Connectivity, and Mobility, CICTP 2018

作者： Ji, Xinkai Ran, Bin Zhang, Jian Hong, Yang Zhang, Xiaoli Jiangsu Key Laboratory of Urban ITS Southeast Univ. Si Pai Lou #2 Nanjing Jiangsu210096 China Jiangsu Province Collaborative Innovation Center of Modern Urban Traffic Technologies Si Pai Lou #2 Nanjing Jiangsu210096 China School of Transportation Southeast Univ. Collaborative Innovation Center for Technology and Application of Internet of Things China Research Center for Internet of Mobility Southeast Univ. Collaborative Innovation Center for Technology and Application of Internet of Things China Hohai Univ. China Collaborative Innovation Center for Technology and Application of Internet of Things China

ISBN: (数字)9780784481523

ISBN: (纸本)9780784481523

Urban traffic corridors are the main arteries of urban traffic operation. Accurate identification of urban traffic corridors is a vital problem that should be addressed in urban public traffic planning. In this paper, a new method for identifying traffic corridors, method of trajectory intersection clustering (MTIC), is proposed. Users' travel trajectories were extracted from cell phone big data using a three-stage trajectory pretreatment method. Then, urban traffic corridors were identified by clustering the intersection points of extracted trajectories and inspection lines. To deal with the huge amount of data, the computing platform Apache Spark was used to implement the method. A case study based on the cell phone data collected in Nanjing in October, 2016, shows the accuracy and efficiency of the proposed method in identifying urban traffic corridors. © 2018 American Society of Civil Engineers.

关键词： Trajectories

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Design of Luby Transform Codes with Gray-Mapped 16-QAM Over AWGN Channels

Design of Luby Transform Codes with Gray-Mapped 16-QAM Over ...

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IEEE Canadian Conference on Electrical and Computer Engineering

作者： Shengkai Xu Dazhuan Xu Nanjing University of Aeronautics and Astronautics Jiangsu Key Laboratory of Internet of Things and Control Technologies College of Electronic and Information Engineering Nanjing China

ISBN: (纸本)9781538624111

In this paper, we investigate Gray-mapped 16-QAM modulated Luby Transform (LT) codes over additive white Gaussian noise (AWGN) channels. Degree distributions for LT codes with a BPSK modulation have been well studied in the literature but those distributions provide unsatisfactory bit-error-rate (BER) performance under high order constellations. To improve the BER performance of LT codes with Gray-mapped QAM, this paper presents a novel optimization design of degree distributions. First, we put forth the concept of variance-to-mean ratio (VMR) in a Gaussian distribution because that the variance is two times larger than the mean in the conventional Gaussian approximation (GA) no longer applies for QAM. Second, we provide a generalized GA process using the obtained VMRs to analyze the asymptotic BER performance of LT codes and furthermore lower bound on BER. Third, aiming at minimizing the average degree of degree distribution, we propose a novel model constrained by the lower bound on BER. Simulation results show that the degree distribution offered by the proposed optimization model can provide outstanding BER performance of LT codes with Gray-mapped 16-QAM over the AWGN channel.

关键词： 16-QAM bit error rate performance AWGN channels Level Trigger Codes AWGN Bit error rate Gaussian distribution

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Processing Inductance Loop Detector Data on an Urban Expressways 17

Processing Inductance Loop Detector Data on an Urban Express...

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17th COTA International Conference of Transportation Professionals: Transportation Reform and Change - Equity, Inclusiveness, Sharing, and Innovation, CICTP 2017

作者： Huang, Shuaifeng Li, Linchao Zhang, Jian Zhang, Wenliang Jiangsu Key Laboratory of Urban ITS Southeast Univ. Si Pai Lou #2 Nanjing Jiangsu210096 China Jiangsu Province Collaborative Innovation Center of Modern Urban Traffic Technologies Si Pai Lou #2 Nanjing Jiangsu210096 China Collaborative Innovation Center for Technology and Application of Internet of Things China

ISBN: (数字)9780784480915

ISBN: (纸本)9780784480915

Processing inductance loop detector data for desirable outputs is essential for traffic management and control. Because there are two kinds of correlations in traffic flow data, namely, spatial correlations and temporal correlations, we propose a loop data processing method based on both spatial and temporal dimensions. The performance of the proposed method is evaluated with the data collected on an urban expressway segment in Shanghai. In addition, the comparisons between time series model (ARMA), spatial multivariate linear model, and comprehensive model based on spatio-temporal characteristics are conducted. The results indicate that the last model can fit the data best. © 2017 ASCE.

关键词： Inductance

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Operation efficiency and safety analysis of integrated ramp metering and mainstream traffic flow control via variable speed limits on freeway 17

Operation efficiency and safety analysis of integrated ramp ...

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17th COTA International Conference of Transportation Professionals: Transportation Reform and Change - Equity, Inclusiveness, Sharing, and Innovation, CICTP 2017

作者： Zheng, Yuan Qu, Xu Ran, Bin Zhang, Jian Dai, Guanchen Jiangsu Key Laboratory of Urban ITS Southeast Univ. Jiangsu Province Collaborative Innovation Center of Modern Urban Traffic Technologies Si Pai Lou 2 Nanjing Jiangsu210096 China School of Transportation Southeast Univ. Collaborative Innovation Center for Technology and Application of Internet of Things China

ISBN: (数字)9780784480915

ISBN: (纸本)9780784480915

The primary objective of this paper is to analyze freeway operation efficiency and safety of integrated control strategy. The simulation parameters are calibrated and validated using collected data on southbound I-880 freeway in California, the United States. The integrated control is estimated using cascade feedback of mainstream traffic flow control (MTFC-VSL) via variable speed limit. And the application of ramp metering (RM) is connected using specifically developed split-range-like scheme. The integrated control strategy is implemented through VISSIM. The results show that the integrated control had a 41.5% improvement in total travel time (TTT) over the no-control case. Moreover, about 59.8% of total conflicts are reduced by the integrated control strategy than the no-control case. Thus, it is beneficial to well understanding the mechanism of integrated control strategy and using it in practical implementation. © 2018 American Society of Civil Engineers (ASCE). All rights reserved.

关键词： Travel time

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