Research on the invulnerability of regional network based on topology analysis by Changqing AN, Yujia LIU, Hui WANG, Zhiyan ZHENG, Tao YU, Jilong WANG

“…To measure the overall impact of different attacks a network region may encounter, an evaluation algorithm can be used to capture the difference in invulnerability of regional network topologies.Specifically, the vulnerability of regional network and that of connection topology between regions both internally and externally was analyzed.To find predictions between regions as supplemental topology data and create the Internet topology, data would be measured in various ways and verified.Using stratified probability sampling, multiple damage simulations could predict the worst-case scenarios in real conditions.Damage was simulated multiple times based on stratified probability sampling to approximate the damage situation of the area under real conditions.A significance tester was realized to measure the impact of damage from the overall level and special weak points respectively, discover the difference of the damage between the areas, and calculate the regional invulnerability ranking.Finally, the ranking and clustering results of forty-eight regions were given.…”
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Opportunistic spectrum access method for cognitive radio sensor network of typical deployment strategies by Wen-xiang LI, Ya-jie MA, Peng KE

“…Explored the opportunistic spectrum access method for cognitive radio sensor networks with regular topology patterns and coverage patterns.The method includes an economic spectrum-and-timeslot-allocation scheme,a sensing-results-reporting scheme and a cooperative spectrum-sensing scheme.A model was proposed for analyzing the blocking and dropping probability for secondary users,the effective reception bandwidth and transmission delay.Numerical analysis shows that Triangle yields the optimal cooperative sensing performance,and square yields the optimal reception bandwidth.In case of complete coverage,Square and triangle lead to less transmission delay,and in case of multiple coverage,square leads to the least transmission delay.The false alarm probability of single node has little impact on transmission delay,and Primary User’s activity may affect delay noticeably.On the other hand,larger ratio of transmission timeslot to sensing timeslot helps to decrease delay.…”
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Weighted evidence combination based on degree of credibility and certainty by Lu WANG, Qing-hua XING, Yi-fan MAO

“…To overcome the invalidation problem of Dempster rule with high conflict,a weighted combination method based on degree of credibility and certainty was proposed.Firstly,the cosine similarity was modified to hold the ability to measure the evidence conflict when multi-subset focal elements were included,followed by the building of evidence credibility model.Secondly,the evidence certainty model based on precision and entropy was presented,which can both reflect the evidence’s degree of multi-subset focal elements and the dispersion degree of probability assignment.Then the weighted coefficient was determined by credibility and certainty.Finally,the normalized weighted coefficient was used to average the basic probability assignment,and the final combination result can be obtained according to Dempster rule.Numerical examples show that,compared with other traditional weighted combination methods,the proposed approach has made better performance in reducing conflict and accelerating convergence.…”
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Networking model and traffic analysis for integrating ad hoc and LEO satellite terminals by WANG Xiao-yan, WANG Hao, DONG Yan, HUANG Zai-lu

“…The compromise between the utilization rate of valuable satellite channels and the blocking probability of new call was hardly to achieve.Enlightened by the advantages of ad hoc networking,a new scheme was proposed which al-lowed the terminals to work in alternative mode according the instructions from the satellite’s signaling channel,meaned to communicate with other terminals in ad hoc mode when they were in a distance shorter than the maximum ad hoc communication distance and when the system was in busy state or in normal satellite communication mode when the system was idle.So the overflow traffic in nearer distance might get serviced with ad hoc mode and the system’s parame-ters was improved.Simulation results show that the proposed scheme has decreased the realistic call blocking probability and increased the valid channel utility rate of the system.…”
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Noisy voice detection algorithm based on feature stream fusion by Hua LONG, Mingliang YANG, Yubin SHAO

“…Aiming at the problem that the initial detection performance of voice segment was poor,and the voice continuity structure was damaged in voice communication,a noisy voice detection algorithm based on feature stream fusion was proposed.Firstly,the time domain feature stream,the spectral pattern feature stream and the statistical feature stream were extracted according to the voice characteristics.Secondly,the voice segment in the noisy audio was estimated by different voice feature streams.Finally,the voice prediction probability obtained by each feature stream was weighted and fused,and the voice estimation probability was processed in short time by the hidden Markov model.The performance test of composite voice database under the condition of multi-type noise and different signal-to-noise ratio shows that compared with the baseline model based on Bayesian and DNN classifier,the voice detection accuracy of the proposed algorithm is improved by 21.26% and 11.01% respectively,and the quality of target voice is significantly improved.…”
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Probabilistic Behavior Analysis of MIMO Fading Channels under Geometric Mean Decomposition by Ping-Heng Kuo, Pang-An Ting

“…In particular, closed-form univariate and bivariate probability density functions (PDFs) for these metrics under Rayleigh fading are derived using Gamma approximations. …”
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Degradation State Identification of Cracked Ultrasonic Motor by Means of Fault Feature Extraction Method by Guoqing An, Hongru Li

“…Finally, a matrix composed of the probability distributions, obtained from permutation entropy calculation, is applied for the degradation state identification by means of probability distribution divergence. …”
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Research on Performance of Covert Wireless Communication over Uplink LEO Satellite-Terrestrial Network by ZENG Shulei, CAO Bin

“…With the aid of stochastic geometry, the distributions of distances between the transmitter and satellites were analyzed, providing key insights into the uplink performance and interference experienced within a satellite's coverage area.Approximate expressions for the detection error probability and transmission outage probability were provided. …”
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Research on accurate ranging of UWB under indoor environments by WU Shao-hua, ZHANG Nai-tong

“…The accurate ranging ability of ultra wideband（UWB） signal under IEEE 802.15.4a indoor channel model was studied.An improved time-of-arrival（TOA） estimation algorithm which utilizes region search and threshold comparison was proposed.By statistical analysis on certain characteristics of the CM1 and CM2 channel profiles,the probability model of TOA estimation error was deduced.The thresholds of the proposed TOA estimation algorithm were then set by limiting the error probability to the lowest level.The mean absolute ranging errors under different SNR were simulated.Results show that high enough SNR should be guaranteed in order to obtain centimeter-level ranging precision under in-door environments,while extremely high SNR would not help to improve the ranging precision any more but lead to a performance floor.The results have instructional significance on designing localization algorithms and transmission power control in practical ranging.…”
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Array amplitude-phase and mutual coupling error joint correction method based on sparse Bayesian by Ding WANG, Weigang GAO, Zhidong WU

“…In the actual array direction finding system, there are often a variety of errors such as amplitude and phase, mutual coupling, which lead to serious deterioration of array direction finding performance.In order to solve the problem of array direction finding misalignment in the presence of low signal-to-noise ratio, small snapshots and multiple errors, the spatial sparsity of signals were introduced, and Bayesian sparse reconstruction technology was used to solve the passive correction and joint estimation of array signal azimuth in the presence of amplitude-phase and mutual coupling errors.The over-complete model of the received signal with error was constructed, and the posterior probability density function of the received signal was obtained.The EM algorithm was used to iteratively optimize the probability density function to solve the corresponding parameters.At the same time, the CRLB of array error and signal azimuth was derived, and by experimental simulation verifies the effectiveness of the proposed method.…”
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RELIABILITY ANALYSIS FOR JACK-UP GEARBOX BASED ON COPULA BAYESIAN NETWORK by ZHANG Qing, LIU Chao, SUN YuanTao, QIN XianRong

“…However,the Copula Bayesian network takes advantage of both Copula function and Bayesian network,it can takes the correlation of variables into consideration by using Copula function,and makes probability inference of reliability at the same time. …”
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Secrecy analysis for orthogonal time frequency space technique based LEO satellite communication by Zan LI, Junfan HU, Bing LI, Jia SHI, Jiangbo SI

“…In order to improve the security performance of low earth orbit (LEO) satellite downlink communication system, a cooperative UAV was employed to send jamming signals against the eavesdroppers.In particular, the downlink transmission was based on the orthogonal time frequency space (OTFS) technique to combat the severe Doppler effect caused by the high mobility of the LEO satellite.The closed form expression for the security outage probability (SOP) was derived at the legitimate receiver, where a novel moment matching approach was used for finding a summed probability distribution function (PDF) of the shadowed-Rician (SR) distributed terms.Simulation results prove that the SOP performance advantage of the downlink LEO satellite communication achieved by OTFS over OFDM scheme, and show the effectiveness of employing unmanned aerial vehicle (UAV) jammer in terms of enhancing secrecy transmission.…”
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Asymptotic estimation for statistical models of continuous-time discrete martingales by Vaidotas Kanišauskas, Karolina Kanišauskienė

“…The research applies the optimum Fréchet differentiation of random and parametric functions based on the probability in normed spaces in terms of a continuous compensator. …”
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Fault diagnosis method based on time domain weighted data aggregation and information fusion by Yu Zhang, Wen Jiang, Xinyang Deng

“…At last, the basic probability assignments generated under each fault feature are fused by Dempster combination rule. …”
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Simulation Analysis of the System Reliability of Cylinder Sine Oscillating Tooth Transmission by Yuan Xinmei, Zeng Yunyun, Zhou Sizhu

“…In view of the problem that the conventional analysis method cannot directly solve reliability problem of the complex cylinder sine oscillating tooth transmission system,a simulation method based on minimal cut sets of fault tree is proposed,which can solves system reliability.According to the structural characteristics of cylinder sine oscillating tooth transmission,the function block diagram of the system is given and the fault tree of the system is built.The minimal cut sets of the fault tree are acquired,and the cumulative failure probability and the probability density are calculated.Different types life distribution function of the system are fitted out.The life distribution function is determined preliminarily based on the principle of minimum residual sum of squared,and the K-S hypothesis testing is carried out for the life distribution function,which ultimately determine life distribution function of cylinder sine oscillating tooth transmission is Weibull distribution.The weak links of cylinder sine oscillating tooth transmission system are determined by analysis of model importance.…”
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Effectiveness of restructuring strategies: empirical evidence from Croatian firms by Nenad Filipović, Goran Horvat

“…The purpose of the article is to analyze the impact of restructuring actions on the probability of post pre-bankruptcy success. The main research problem is the selection of the most efficient restructuring strategies with the objective of determining which restructuring actions contribute to the probability of successful recovery. …”
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Output-Feedback and Inverse Optimal Control of a Class of Stochastic Nonlinear Systems with More General Growth Conditions by Liu Jianwei, Guo Longchuan, Zuo Xin, Liang Huaqing

“…By using backstepping technique, choosing a high-gain parameter, an output-feedback controller is designed to ensure the closed-loop system to be globally asymptotically stable in probability, and the inverse optimal stabilization in probability is achieved. …”
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Cooperative spectrum sensing algorithm based on limiting eigenvalue distribution by Yin MI, Guang-yue LU

“…A novel maximum-minimum eigenvalue (NMME) cooperative spectrum sensing algorithm and threshold decision rule are proposed via analyzing minimum eigenvalue limiting distribution of the covariance matrix of the received signals from multiple cognitive users (CU) by means of latest random matrix theory (RMT).The proposed scheme could not need the prior knowledge of the signal transmitted from primary user (PU) and could effectively overcome the noise uncertainty.At a given probability of false alarm (P<sub>fa</sub>),simulation results show that the proposed scheme can get lower decision threshold and higher probability of detection (P<sub>d</sub>) compared with the original algorithm,and it can also get better detection performance with fewer CU and smaller sample numbers.…”
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Development of a management tool to prevent emotional burnout in project teams by M. M. Vasin, I. A. Elistratov, A. S. Kumkin

“…Based on the tool’s advantages and disadvantages analysis, the authors have proposed innovations to minimize probability of burnout syndrome among project team members. …”
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Study on the Joint Distribution of Annual Maximum Flood of Changzhou Reservoir Based on Copula Function by HUANG Feng, HOU Guibing, YI Ling, LI Yuanyuan, WANG Baohua

“…The annual maximum flood magnitude and occurrence time are of great significance to the safe flood control and comprehensive benefits of reservoirs.Taking Changzhou reservoir as the example,this paper uses Von Mises function distribution and Pearson Type Ⅲ distribution to describe the time probability distribution of flood and probability distribution of peak discharge respectively,establishes the joint distribution of the two variables of the occurrence time and magnitudes of the annual maximum flood based on Frank Copula function,and describes the occurrence time distribution characteristics,joint return period and conditional return period of annual maximum flood in Changzhou reservoir.The results show that the joint distribution function based on Frank Copula function can fit both occurrence time and magnitudes of the annual maximum flood well,and can effectively mine the information of inflow flood,which can provide reference for the optimal dispatching and risk management.…”
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