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Double resonance in star networks of bistable units with disordered signals

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Communications in Theoretical Physics 2020年第5期72卷 98-104页

作者： yang ge Xiao-Ming Liang School of Physics and Electronic Engineering Jiangsu Normal UniversityXuzhou 221116China

It has been found that a hub node is better able to amplify weak external signals than leaf nodes in star *** hub-enhanced amplification is only attained by a single hub node and is limited to weak coupling *** show here that random initial phases in external weak signals do not affect the hub-enhanced amplification at weak coupling ***,they can improve the responses of all the leaf nodes to external signals at large coupling strength,resulting in a double resonance-like signal *** use a reduced model to analyze the influence of the star structure and random initial phases on the emergence of double resonance.

关键词： signal amplification random initial phases star networks bistable units

Hot deformation behavior of an antibacterial Co–29Cr–6Mo–1.8Cu alloy and its effect on mechanical property and corrosion resistance

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Journal of Materials Science & Technology 2018年第3期34卷 523-533页

作者： Erlin Zhang yang ge Gaowu Qin Key Lab.for Anisotropy and Texture of Materials Education Ministry of China School of Materials Science and Engineering Northeastern University

In order to optimize the deformation processing, the hot deformation behavior of Co-Cr-Mo-Cu （here- after named as Co-Cu） alloy was studied in this paper at a deformation temperature range of 950-1150 ℃ and a strain rate range of 0.008-5 s^-1. Based on the true stress-true strain curves, a constitutive equation in hyperbolic sin function was established and a hot processing map was drawn. It was found that the flow stress of the Co-Cu alloy increased with the increase of the strain rate and decreased with the increase of the deforming temperature. The hot processing map indicated that there were two unstable regions and one well-processing region. The microstructure, the hardness distribution and the electro- chemical properties of the hot deformed sample were investigated in order to reveal the influence of the hot deformation. Microstructure observation indicated that the grain size increased with the increase of the deformation temperature but decreased with the increase of the strain rate. High temperature and low strain rate promoted the crystallization process but increased the grain size, which results in a reduction in the hardness. The hot deformation at high temperature （1100-1150 ℃） would reduce the corrosion resistance slightly. The final optimized deformation process was： a deformation temperature from 1050to 1100 ℃, and a strain rate from 0.008 to 0.2 s^-1, where a completely recrystallized and homogeneously distributed microstructure would be obtained.

关键词： Cu containing Co based alloy Flow behaviors Constitutive equation Hot processing map Recrystallization Co-Cr-Mo alloy Biomedical application

Coincidence Theorem for Admissible Set-valued Mappings and Its Applications in FC-spaces

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Acta Mathematicae Applicatae Sinica 2010年第3期26卷 455-462页

作者： Ming-ge yang Lei Deng Department of Mathematics Luoyang Normal University Luoyang Henan 471022 China Department of Mathematics Sichuan University Chengdu Sichuan 610064 China School of Mathematics and Statistics Southwest University Chongqing 400715 China

A new coincidence theorem for admissible set-valued mappings is proved in FC-spaces with a more general convexity structure. As applications, an abstract variational inequality, a KKM type theorem and a fixed point th... 详细信息

关键词： FC-space coincidence theorem admissible set-valued mapping

Coincidence Theorems with Applications to Minimax Inequalities,Section Theorem,Best Approximation and Multiobjective Games in Topological Spaces

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Acta Mathematica Sinica,English Series 2006年第6期22卷 1809-1818页

作者： Lei DENG Ming ge yang Department of Mathematics Southwest University Chongqing 400715 P. R. China

Some new coincidence theorems involving admissible set-valued mappings are proved in general noncompact topological spaces. As applications, some new minimax inequalities, section theorem, best approximation theorem, existence theorems of weighted Nash equilibria and Pareto equilibria for multiobjective games are given in general topological spaces.

关键词： admissible set-valued mapping generalized R-KKM mapping transfer compactly openvalued compactly local intersection property multiobjective game

Automatic radar antenna scan type recognition based on limited penetrable visibility graph

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Journal of Systems Engineering and Electronics 2021年第2期32卷 437-446页

作者： LIU Songtao LEI Zhenshuo ge yang WEN Zhenming Department of Information System Dalian Naval AcademyDalian 116018China

To address the problem of the weak anti-noise and macro-trend extraction abilities of the current methods for identifying radar antenna scan type,a recognition method for radar antenna scan types based on limited penetrable visibility graph(LPVG)is ***,seven types of radar antenna scans are analyzed,which include the circular scan,sector scan,helical scan,raster scan,conical scan,electromechanical hybrid scan and two-dimensional electronic ***,the time series of the pulse amplitude in the radar reconnaissance receiver is converted into an LPVG network,and the feature parameters are ***,the recognition result is obtained by using a support vector machine(SVM)*** experimental results show that the recognition accuracy and noise resistance of this new method are improved,where the average recognition accuracy for radar antenna type is at least 90%when the signalto-noise ratio(SNR)is 5 dB and above.

关键词： antenna scan type limited penetrable visibility graph(LPVG) support vector machine(SVM) cognitive electronic warfare

Stochastic P-bifurcations of a noisy nonlinear system with fractional derivative element

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Acta Mechanica Sinica 2021年第3期37卷 507-515,I0004页

作者： Ya-Hui Sun Yong-ge yang Wei Xu School of Applied Mathematics Guangdong University of TechnologyGuangzhou 510520China Department of Applied Mathematics Northwestern Polytechnical UniversityXi'an 710072China

This paper investigates the stochastic P-bifurcation(SPB)of a fractionally damped oscillator subjected to additive and multiplicative Gaussian white *** transformation and the stochastic averaging technique are applied to derive the expression of probability density function(PDF)of the system *** conditions of the stochastic bifurcation induced by system parameters are presented based on the change in the number of extreme points of the probability density *** results are given to show the effectiveness of the proposed *** P-bifurcations for additive and multiplicative noise are studied in detail according to the critical conditions.

关键词： Stochastic P-bifurcation Fractional derivative Stochastic averaging method Gaussian white noise

Binaural sound source localization based on weighted template matching

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CAAI Transactions on Intelligence Technology 2021年第2期6卷 214-223页

作者： Hong Liu Yongheng Sun ge yang yang Chen Key Laboratory of Machine Perception Shenzhen Graduate SchoolPeking UniversityShenzhenChina College of Liangjiang Artificial Intelligence Chongqing University of TechnologyChongqingChina Yanka Kupala State University of Grodno GrodnoBelarus

In robot binaural sound source localization(SSL),locating the direction of the sound source accurately in the shortest time is *** refers to the algorithm complexity,but even more to the shortest duration of the required signal.A novel binaural SSL method based on feature and frequency weighting is *** specifically,in the training stage,the direction-related interaural cross-correlation function(CCF)and interaural intensity difference(IID)in each frequency band are calculated under noiseless conditions,which are considered the *** the testing stage,first the cosine similarities between the CCF and IID of the test signal and templates are calculated in all features and frequency ***,the direction likelihood can be obtained by weighting the ***,the direction with maximum likelihood is specified as the direction of the sound *** were carried out on CIPIC dataset subject 003 with different noises in the noisex-92 dataset and demonstrated that the method can accurately locate the sound source with a short signal duration.

关键词： template SSL robot

New Kamenev-type Oscillation Criteria for Half-linear Partial Differential Equations

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Acta Mathematicae Applicatae Sinica 2012年第3期28卷 535-548页

作者： ge-feng yang Zhi-ting XU Cisco School of Informatics Guangdong University of Foreign StudiesGuangzhou510006China School of Mathematical Sciences South China Normal UniversityGuangzhou510631China

We establish new Kamenev-type oscillation criteria for the half-linear partial differential equation with damping div（A（x）｜｜ u｜｜^p-2 u）＋〈b（x）,｜｜ u｜｜^p-2 u〉＋c（x）｜u｜^p-2u=0（E）under quite general conditions. These results are extensions of the recent results developed by Sun [Y.C. Sun, New Kamenev-type oscillation criteria of second order nonlinear differential equations with damping, J. Math. Anal. Appl. 291 （2004） 341-351] for second order ordinary differential equations in a natural way, and improve some existing results in the literature. As applications, we illustrate our main results using two different types of half-linear partial differential equations.

关键词： oscillation half-linear partial differential equations Kamenev-type Damped equation

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CAAI Transactions on Intelligence Technology 2022年第1期7卷 26-33页

作者： Hong Liu Peipei Yuan Bing yang ge yang yang Chen Key Laboratory of Machine Perception Shenzhen Graduate SchoolPeking UniversityShenzhenChina School of Artificial Intelligence Chongqing University of TechnologyChongqingChina Yanka Kupala State University of Grodno GrodnoBelarus

Various time-frequency(T-F)masks are being applied to sound source localization ***,deep learning has dramatically advanced T-F mask ***,existing masks are usually designed for speech separation tasks and are suitable only for single-channel signals.A novel complex-valued T-F mask is proposed that reserves the head-related transfer function(HRTF),customized for binaural sound source *** addition,because the convolutional neural network that is exploited to estimate the proposed mask takes binaural spectral information as the input and output,accurate binaural cues can be *** with conventional T-F masks that emphasize single speech source–dominated T-F units,HRTFreserved masks eliminate the speech component while keeping the direct propagation ***,the estimated HRTF is capable of extracting more reliable localization features for the final direction of arrival ***,binaural sound source localization guided by the proposed T-F mask is robust under noisy and reverberant acoustic *** experimental results demonstrate that the new T-F mask is superior to conventional T-F masks and lead to the better performance of sound source localization in adverse environments.

关键词： estimation. sound function