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Effects of Negative Stimulation After Exercise on Frontal Asymmetry in Unregular Exercisers

IOP Conference Series: Materials Science and Engineering 2019年第5期612卷

作者： Tengfei Wang Guangyuan Liu School of Electronic and Information Engineering Southwest University Chongqing 400700 China Chongqing Key Laboratory of Nonlinear Circuits and Intelligent Information Processing Chongqing 400700 China

As a signal to recognize emotion, the electroencephalogram (EEG) is used widely. Frontal asymmetry is not only related to emotion, but also affected by exercise. The purpose of our research is to explore the effects of exercise for negative emotion, and how the activity of the frontal of the college students who did not exercise regularly is. We used the frontal asymmetry between F3 and F4 channels of the alpha band. The result showed that the power of frontal asymmetry increased after exercise compared to that before exercise within 3 seconds after stimulation, and the change of the power during the 2nd second was more obvious. The activity of the frontal of the students without exercise habits can be altered by exercise. The frontal asymmetry is related to emotion, which confirms that exercise has an effect on the students without exercise habits after negative stimulation.

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Secrecy outage analysis of mixed RF-FSO downlink SWIPT systems

arXiv

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arXiv 2018年

作者： Lei, Hongjiang Dai, Zhijun Park, Ki-Hong Lei, Weijia Pan, Gaofeng Alouini, Mohamed-Slim Chongqing Key Lab of Mobile Communications Technology Chongqing University of Posts and Telecommunications Chongqing400065 China Thuwal23955-6900 Saudi Arabia Chongqing Key Laboratory of Nonlinear Circuits and Intelligent Information Processing Southwest University Chongqing400715

We analyze a secure dual-hop mixed radio frequency-free space optical (RF-FSO) downlink simultaneous wireless information and power transfer (SWIPT) systems. The FSO link and all RF links experience Gamma-Gamma, independent and identical Nakagami-mfading, *** analyze the effects of atmospheric turbulence, pointing error, detection technology, path loss, and energy harvesting on secrecy performance. Signal-to-noise ratios at both legitimate and illegitimate receivers are not independent since they are both simultaneously influenced by the FSO link. We derive the closedform expression of the secrecy outage probability (SOP) as well as the asymptotic result for SOP when signal-to-noise ratios at relay and legitimate destinations tend to infinity. Monte-Carlo simulations are performed to verify the accuracy of our analysis. The results show that the secrecy diversity order (SDO) depends on the fading parameter of the relay-destination link and the number of the destination's antennas. Additionally, the SDO also depends on the fading parameters, the pointing error parameter, and the detection type of the FSO link. Copyright © 2018, The Authors. All rights reserved.

关键词： Monte Carlo methods

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Feature Selecting based on Fourier Series Fitting

Feature Selecting based on Fourier Series Fitting

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2017 IEEE 8th International Conference on Software Engineering and Service Science

作者： Huanyu Chen Chongyang Wang Tong Chen Xingcong Zhao Chongqing Key Laboratory of Non-linear Circuits and Intelligent Information Processing Southwest University Chongqing Academy of Metrology and Quality Inspection

In spectral quantitative analysis, the accuracy and complexity of the designed prediction model will be negatively affected by enormous data volume and noise of the original spectrum. This paper presents a dimensionality reduction and noise decreasing method for original spectrum analysis based on Fourier series fitting(FSF). By extracting features using FSF, the original spectrum data will be mapped into Fourier series, and a regression prediction model using partial least squares(PLS) is established. The experimental analysis suggests that FSF method, compared with PLS, discrete fourier transform(DFT), artificial neural networks(ANNs) and genetic algorithm with PLS(GAPLS), can produce better results considering the running time, the number of input variables and prediction accuracy.

关键词： Quantitative analysis Fourier series fitting Feature extraction Dimensionality reduction Noise decreasing

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Secrecy performance analysis of SIMO underlay cognitive radio systems with outdated CSI

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IET Communications 2017年第12期11卷 1961-1969页

作者： Lei, Hongjiang Zhang, Jianming Park, Ki-Hong Ansari, Imran Shafique Pan, Gaofeng Alouini, Mohamed-Slim Chongqing Key Lab of Mobile Communications Technology Chongqing University of Posts and Telecommunications Chongqing 400065 China Computer Electrical and Mathematical Science and Engineering (CEMSE) Division King Abdullah University of Science and Technology (KAUST) Thuwal 23955-6900 Saudi Arabia Department of Electrical and Computer Engineering (ECEN) Texas A and M University at Qatar (TAMUQ) Education City Doha Qatar Chongqing Key Laboratory of Non-linear Circuits and Intelligent Information Processing Southwest University Chongqing 400715 China

This study investigates the secrecy outage performance of a single-input multiple-output underlay cognitive radio network (CRN) with outdated channel state information (CSI). The confidential messages are transmitted from transmitter to the destination, while a multi-antenna eavesdropper exists. The maximal ratio combining and selection combining schemes are utilised at the receivers to improve the quality of the received signal-to-noise ratio. The exact and asymptotic closed-form expressions of secrecy outage probability are derived, and simulation results are provided to verify the authors' proposed analytical results. The results reveal that imperfect CSI of main channels deteriorates the secrecy outage performance while that of eavesdropping and interfering channels has contrary effect, and only a unity diversity order can be obtained in underlay CRNs with imperfect CSI. © The Institution of Engineering and Technology.

关键词： antenna arrays cognitive radio diversity reception probability radio networks telecommunication security

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On secure mixed RF-FSO systems with TAS and imperfect CSI

arXiv

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arXiv 2018年

作者： Lei, Hongjiang Luo, Haolun Park, Ki-Hong Ansari, Imran Shafique Lei, Weijia Pan, Gaofeng Alouini, Mohamed-Slim School of Communication and Information Engineering Chongqing University of Posts and Telecommunications Chongqing400065 China School of Engineering University of Glasgow GlasgowG12 8QQ United Kingdom Chongqing Key Laboratory of Nonlinear Circuits and Intelligent Information Processing Southwest University Chongqing400715 Thuwal23955-6900 Saudi Arabia

In this work, we analyze the secrecy outage performance of a dual-hop relay system composed of multiple-input-multiple-output radio-frequency (RF) links and a free-space optical (FSO) link while a multiple-antenna eavesdropper wiretaps the confidential information by decoding the received signals from the resource node. The channel state information (CSI) of the RF and FSO links is considered to be outdated. We propose three transmit antenna selection (TAS) schemes to enhance the secrecy performance of the considered systems. The secrecy outage performance with different TAS schemes is analyzed and the effects of misalignment and detection technology on the secrecy outage performance of mixed systems are studied. We derive the closed-form expressions for probability density function (PDF) and cumulative distribution function (CDF) over Málaga channel with imperfect CSI. Then the closed-form expressions for the CDF and PDF of the equivalent signal-to-noise ratio (SNR) at the legitimate receiver over Nakagami-m and Málaga channels are derived. Furthermore, the lower bound of the secrecy outage probability (SOP) with different TAS schemes are derived. Besides, the asymptotic results for SOP are investigated by exploiting the unfolding of Meijer's G-function when the electrical SNR of FSO link approaches infinity. Finally, Monte-Carlo simulation results are presented to testify the correctness of the proposed analysis. The results illustrate that the outdated CSI shows a strong effect on the secrecy outage performance. In addition, increasing the number of antennas at the source cannot significantly enhance the secrecy performance of the considered systems. Copyright © 2018, The Authors. All rights reserved.

关键词： Signal to noise ratio

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Secrecy outage analysis for cooperative NOMA systems with relay selection scheme

arXiv

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arXiv 2018年

作者： Lei, Hongjiang Yang, Zixuan Park, Ki-Hong Ansari, Imran Shafique Guo, Yongcai Pan, Gaofeng Alouini, Mohamed-Slim School of Communication and Information Engineering Chongqing Key Lab of Mobile Communications Technology Chongqing University of Posts and Telecommunications Chongqing400065 China School of Engineering University of Glasgow GlasgowG12 8QQ United Kingdom Key Laboratory of Optoelectronic Technology and Systems Education Ministry of China Chongqing University Chongqing400044 China Chongqing Key Laboratory of Nonlinear Circuits and Intelligent Information Processing Southwest University Chongqing400715 Thuwal23955-6900 Saudi Arabia

This paper considers the secrecy outage performance of a multiple-relay assisted non-orthogonal multiple access (NOMA) network over Nakagami-m fading channels. Two slots are utilized to transmit signals from the base station to destination. At the first slot, the base station broadcasts the superposition signal of the two users to all decode-and-forward relays by message mapping strategy. Then the selected relay transmits superposition signal to the two users via power-domain NOMA technology. Three relay selection (RS) schemes, i.e., optimal single relay selection (OSRS) scheme, two-step single relay selection (TSRS) scheme, and optimal dual relay selection (ODRS) scheme, are proposed and the secrecy outage performance are analyzed. As a benchmark, we also examine the secrecy outage performance of the NOMA systems with traditional multiple relays combining (TMRC) scheme in which all the relay that successfully decode signals from the source forward signals to the NOMA users with equal power. Considering the correlation between the secrecy capacity of two users and different secrecy requirement for two NOMA users, the closed-form expressions for the security outage probability (SOP) of the proposed OSRS, TSRS, and ODRS schemes along with the TMRC scheme are derived and validated via simulations. To get more insights, we also derive the closed-form expressions for the asymptotic SOP for all the schemes with fixed and dynamic power allocations. Furthermore, the secrecy diversity order (SDO) of cooperative NOMA systems is obtained. The results demonstrate that our proposed schemes can significantly enhance the secrecy performance compared to the TMRC scheme and that all the RS schemes with fixed power allocation obtain zero SDO and the OSRS scheme with dynamic power allocation obtains the same SDO as TMRC. Copyright © 2018, The Authors. All rights reserved.

关键词： Cooperative communication

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Stability analysis of hybrid neural networks with impulsive time window

引用

International Journal of Biomathematics 2017年第1期10卷 195-208页

作者： Xin Wang Hui Wang Chuandong Li Tingwen Huang Chongqing Key Laboratory of Nonlinear Circuits and Intelligent Information Processing College of Electronics and Information EngineeringSouthwest University Chongqing 400715 P. R. China Key Laboratory of Machine Perception and Children's Intelligence DevelopmentChongqing University of Education P. R. China College of Mathematics Science Chongqing Normal University Chongqing 401331 P. R. China Texas A&M University at QatarDoha P. O. Box 23874 Qatar

The urgent problem with impulsive moments cannot be determined in advance brings new challenges beyond the conventional impulsive systems theory. In order to solve this problem, in this paper, a novel class of system with impulsive time window is proposed. Different from the conventional impulsive control strategies, the main characteristic of the impulsive time window is that impulse occurs in a random manner. Moreover, for the importance of the hybrid neural networks, using switching Lyapunov functions and a generalized Hanlanay inequality, some general criteria for asymptotic and exponential stability of the hybrid neural networks with impulsive time window are established. Finally, some simulations are provided to further illustrate the effectiveness of the results.

关键词： Hybrid neural networks impulsive time window stability.

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Physical-layer secrecy outage of spectrum sharing CR systems over fading channels

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Science China(information Sciences) 2016年第10期59卷 112-120页

作者： Hequn LIU Hui ZHAO Hong JIANG Chaoqing TANG Gaofeng PAN Tingting LI Yunfei CHEN Chongqing Key Laboratory of Nonlinear Circuits and Intelligent Information Processing Southwest University School of Mathematics and Statistics Southwest University School of Engineering University of Warwick

In this paper, we investigate the physical-layer secrecy outage performance of underlay spectrum sharing systems over Rayleigh and log-normal fading channels in the presence of one eavesdropper. In particular, the secondary transmitter sends data to the legitimate receiver under the constraints of the interference temperature at the primary receiver, while suffering the wiretap from the eavesdropper. Closed-form and approximated expressions are derived for the secrecy outage probability over Rayleigh and log-normal fading channels,respectively. The accuracy of our performance analysis is verified by simulation results.

关键词： spectrum sharing cognitive radio secrecy outage probability Rayleigh fading channels log-normal fading channels

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Secrecy Performance Analysis with Optimal DF Relay Selection of Underlay CR Networks over Nakagami-m Fading Channels

Secrecy Performance Analysis with Optimal DF Relay Selection...

引用

IEEE International Conference on Communications

作者： Huan Zhang Hongjiang Lei Imran Shafique Ansari Gaofeng Pan Zhi Ren Khalid A. Qaraqe Chongqing University of Posts and Telecommunications Chongqing Chongqing CN Department of Electrical and Computer Engineering Texas A&M University at Qatar Education City Doha Qatar Chongqing Key Laboratory of Nonlinear Circuits and Intelligent Information Processing Southwest University Chongqing China

ISBN: (纸本)9781467390002

In this paper, the secrecy outage performance of an underlay cognitive decode-and-forward (DF) relay network over independent and non-identical distributed (i.n.i.d) Nakagami-m fading channels is investigated, in which the secondary user transmitter communicates with the secondary destination via relays, and an eavesdropper attempts to overhear the information. We assume that the channel state information (CSI) of all links is available. The exact and asymptotic closed-form expressions for the secrecy outage probability with optimal relay selection are derived, and verified by Monte-Carlo simulations. Through asymptotic analysis, we find that the secrecy diversity order is determined by the number of relays and the fading parameters between relay and destination.

关键词： Relays Fading channels Cognitive radio Wireless sensor networks Communication system security Decoding

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Distributed Optimization for Energy Allocation in Mictrogrid Power System

Distributed Optimization for Energy Allocation in Mictrogrid...

引用

IEEE International Conference on Cyber Technology in Automation, Control, and intelligent Systems

作者： Tiancai Wang Xing He Junjian Huang Miao Sun Yachen He Qin Huang Dongyang Feng Wenming Zhang Chongqing Key Laboratory of Nonlinear Circuits and Intelligent Information Processing Southwest University Chongqing China Key laboratory of Machine Perception and Children's Intelligence Development Chongqing University of Education Chongqing China

ISBN: (纸本)9781538604915

In this paper, a continuous-time distributed algorithms is proposed to solve the energy allocation problem in microgrid power system. Projected output feedback method is employed in the approach to deal with the local capacity constraints. Each agent in the multi-agent network has its own local objective function, local bound constraint and can access the information from the agent nearby. The agents determine the optimal power generation in the responsible area to minimize the sum of local generation cost function while reaching the global supply and demand balance. Also, the distributed method is applied to test on a six-agent system and the simulation result demonstrates that the algorithm proposed can successfully obtain the optimal power generation and the auxiliary variables of each generator agent can always reach consensus.

关键词： Generators Optimization Resource management Distributed algorithms Power generation Microgrids Smart grids

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