语音信号的稀疏表示是语音压缩与降噪等语音处理的关键技术之一.在匹配追踪(matching pursuit,MP)、正交匹配追踪(orthogonal matching pursuit,OMP)等算法的基础上,提出了一种基于Takenaka-Malmquist系的贪婪权值算法(a greedy weight ...语音信号的稀疏表示是语音压缩与降噪等语音处理的关键技术之一.在匹配追踪(matching pursuit,MP)、正交匹配追踪(orthogonal matching pursuit,OMP)等算法的基础上,提出了一种基于Takenaka-Malmquist系的贪婪权值算法(a greedy weight algorithm based on the Takenaka-Malmquist system,TMGW).采用TMGW对语音信号进行重构时只需要较少的分解项数,从而达到语音压缩的目的.同时,根据稀疏分解后信号与噪声在时频面上能量分布不同的特点,该算法可实现对含噪语音的降噪.实验结果表明,TMGW比基于自适应Gabor子字典的匹配追踪算法(matching pursuit algorithm based on the adaptive Gabor sub-dictionary,GMP)更适用于语音信号的稀疏表示.展开更多
By using the truncated Painlevéanalysis and the generalized tanh function expansion approaches,many interaction solutions among solitons and other types of nonlinear excitations of the Konopelchenko–Dubrovsky(KD...By using the truncated Painlevéanalysis and the generalized tanh function expansion approaches,many interaction solutions among solitons and other types of nonlinear excitations of the Konopelchenko–Dubrovsky(KD)equation can be obtained.Particularly,the soliton-cnoidal wave interaction solutions are studied by means of the Jacobi elliptic functions and the third type of incomplete elliptic integrals.展开更多
In this paper, the finite symmetry transformation group of the （2＋1）-dimensional coupled Burgers equation is studied by the modified direct method, and with the help of the truncated Painleve′ expansion approach, ...In this paper, the finite symmetry transformation group of the （2＋1）-dimensional coupled Burgers equation is studied by the modified direct method, and with the help of the truncated Painleve′ expansion approach, some special localized structures for the （2＋1）-dimensional coupled Burgers equation are obtained, in particular, the dromion-like and solitoff-like structures.展开更多
基金Supported by the National Natural Science Foundation of China(10875078)Zhejiang Provincial Natural Science Foundation(Y7080455)Wong K C Magna Fund in Ningbo University
文摘语音信号的稀疏表示是语音压缩与降噪等语音处理的关键技术之一.在匹配追踪(matching pursuit,MP)、正交匹配追踪(orthogonal matching pursuit,OMP)等算法的基础上,提出了一种基于Takenaka-Malmquist系的贪婪权值算法(a greedy weight algorithm based on the Takenaka-Malmquist system,TMGW).采用TMGW对语音信号进行重构时只需要较少的分解项数,从而达到语音压缩的目的.同时,根据稀疏分解后信号与噪声在时频面上能量分布不同的特点,该算法可实现对含噪语音的降噪.实验结果表明,TMGW比基于自适应Gabor子字典的匹配追踪算法(matching pursuit algorithm based on the adaptive Gabor sub-dictionary,GMP)更适用于语音信号的稀疏表示.
基金Supported by the National Natural Science Foundation of China under Grant Nos 11175092,11275123,and 11205092the Shanghai Knowledge Service Platform for Trustworthy Internet of Things under Grant No ZF1213,and the K.C.Wong Magna Fund in Ningbo University。
文摘By using the truncated Painlevéanalysis and the generalized tanh function expansion approaches,many interaction solutions among solitons and other types of nonlinear excitations of the Konopelchenko–Dubrovsky(KD)equation can be obtained.Particularly,the soliton-cnoidal wave interaction solutions are studied by means of the Jacobi elliptic functions and the third type of incomplete elliptic integrals.
基金Project supported by the National Natural Science Foundation of China (Grant No. 11175092)the Scientific Research Fund of Education Department of Zhejiang Province of China (Grant No. Y201017148)K. C. Wong Magna Fund in Ningbo University
文摘In this paper, the finite symmetry transformation group of the （2＋1）-dimensional coupled Burgers equation is studied by the modified direct method, and with the help of the truncated Painleve′ expansion approach, some special localized structures for the （2＋1）-dimensional coupled Burgers equation are obtained, in particular, the dromion-like and solitoff-like structures.
