SHIFT-INVARIANT

作品数：9被引量：30H指数：3
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Different channels to transmit information in scattering media被引量：2
《PhotoniX》2023年第1期545-557,共13页Xuyu Zhang Jingjing Gao Yu Gan Chunyuan Song Dawei Zhang Songlin Zhuang Shensheng Han Puxiang Lai Honglin Liu 
National Natural Science Foundation of China(NSFC)(81930048);Guangdong Science and Technology Commission(2019A1515011374,2019BT02X105);Hong Kong Research Grant Council(15217721,R5029-19,C7074-21GF);Hong Kong Innovation and Technology Commission(GHP/043/19SZ,GHP/044/19GD).
A communication channel should be built to transmit information from one place to another.Imaging is 2 or higher dimensional information communication.Conventionally,an imaging channel comprises a lens with free space...
关键词：CHANNELS Scattering medium Point spread function Deep learning Spatial shift-invariant system 
Contrast Enhancement Based Image Detection Using Edge Preserved Key Pixel Point Filtering
《Computer Systems Science & Engineering》2022年第8期423-438,共16页Balakrishnan Natarajan Pushpalatha Krishnan 
In existing methods for segmented images,either edge point extraction or preservation of edges,compromising contrast images is so sensitive to noise.The Degeneration Threshold Image Detection(DTID)framework has been p...
关键词：Rapid bilateral filtering edge preserved filtering affine planar transformation key pixel point localization shift-invariant base pass domain filter 
Impulsive component extraction using shift-invariant dictionary learning and its application to gear-box bearing early fault diagnosis被引量：4
《Journal of Central South University》2019年第4期824-838,共15页ZHANG Zhao-heng DING Jian-ming WU Chao LIN Jian-hui 
Project(51875481) supported by the National Natural Science Foundation of China;Project(2682017CX011) supported by the Fundamental Research Foundations for the Central Universities,China;Project(2017M623009) supported by the China Postdoctoral Science Foundation;Project(2017YFB1201004) supported by the National Key Research and Development Plan for Advanced Rail Transit,China;Project(2019TPL_T08) supported by the Research Fund of the State Key Laboratory of Traction Power,China
The impulsive components induced by bearing faults are key features for assessing gear-box bearing faults.However,because of heavy background noise and the interferences of other vibrations,it is difficult to extract ...
关键词：gear-box bearing fault diagnosis shift-invariant K-means singular value decomposition impulsive component extraction 
Existence of periodic orbits and shift-invariant curve sequences near multiple homoclinics
《Applied Mathematics(A Journal of Chinese Universities)》2014年第1期108-118,共11页XU Yan-cong GENG Feng-jie 
Supported by Science Research Foundation of the Returned Overseas Chinese Scholar,SEM,the NSF of China(11202192);Zhejiang Province(LY13A010020)and Program for Excellent Young Teachers in HNU(HNUEYT2013)
In this paper, the complicated dynamics is studied near a double homoclinic loops with bellows configuration for general systems. For the non-twisted multiple homoclinics, the existence of periodic orbit with the spec...
关键词：Bifurcations Homoclinic bellows Periodic orbit Invariant-curve sequences 
Sufficient Conditions for Shift-Invariant Systems to be Frames in L^2(R^n)
《Acta Mathematica Sinica,English Series》2013年第8期1629-1636,共8页Deng Feng LI Tao QIAN 
Supported by National Natural Science Foundation of China (Grant No.61071189);the support of the Science and Technology Development Fund of Macao Special Administrative Region (Grant No.056/2010/A3)
The main purpose of this paper is to establish some new sufficient conditions under which shift-invariant systems become frames in L2（Rn）. As applications, we obtain new results for Gabor frames.
关键词：Shift-invariant system FRAME sufficient condition 
A pseudo wavelet system-based vibration signature extracting method for rotating machinery fault detection被引量：13
《Science China(Technological Sciences)》2013年第5期1294-1306,共13页CHEN BinQiang ZHANG ZhouSuo ZI YanYang YANG ZhiBo HE ZhengJia 
supported financially by the National Natural Science Foundation of China(Grant Nos.51275382 and 11176024);the Specialized Research Fund for the Doctoral Program of Higher Education(Grant No.20110201130001)
The rotating machinery,as a typical example of large and complex mechanical systems,is prone to diversified sorts of mechanical faults,especially on their rotating components.Although they can be collected via vibrati...
关键词：rotating machinery SHIFT-INVARIANT non-dyadic decomposition vibration measurement signal impulsiveness 
The Properties of Finitely Generated Shift-invariant Subspace in L_(2π)~2
《Chinese Quarterly Journal of Mathematics》1999年第2期69-75, ,共7页薛明志 朱秀阁 田继善 
In this paper, some properties of shift invariant subspace in Periodic wavelets theory are discussed.
关键词：shift  invariant subspace periodic wavelets dual element 
SHIFT-INVARIANT BI-INNER PRODUCT FUNCTIONALS ARE INNER PRODUCTS被引量：10
《Analysis in Theory and Applications》1999年第1期103-110,共8页Charles K. Chui (1)   Xianliang Shi (1) 
Bi-inner product functionals generated by a pair of Bessel sequences of L2 functions are introduced. It is shown that these functionals are constant multiples of the inner products of L2 and l2, if and only if they ar...
关键词：oscillatory integral operator MULTIPLIER SINGULARITY 
THE AVERAGE CASE COMPLEXITY OF THE SHIFT-INVARIANT PROBLEM被引量：1
《Analysis in Theory and Applications》1998年第1期1-7,共0页Arthur.G.Werschulz 
The present paper deals with the average case complexity of the shift—invariant problem. The main aim is to give a new proof of the upper bound of average error of finite element method. Our method is based on the te...
关键词：FEM THE AVERAGE CASE COMPLEXITY OF THE SHIFT-INVARIANT PROBLEM 
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