Matching pursuits algorithm (MP), as an adaptive signal representation upon overcomplete fundamental waveforms, is a powerful tool in many applications. However, MP suffers from distinguishing a doublet structure. In ...Matching pursuits algorithm (MP), as an adaptive signal representation upon overcomplete fundamental waveforms, is a powerful tool in many applications. However, MP suffers from distinguishing a doublet structure. In this paper, the authors proposed an algorithm called compete matching pursuits (CMP), which can overcome this shortcoming and performance very well.展开更多
Surface electromyogram （EMG） signals were identified by fractal dimension.Two patterns of surface EMG signals were acquired from 30 healthy volunteers＇ right forearm flexor respectively in the process of forearm su...Surface electromyogram （EMG） signals were identified by fractal dimension.Two patterns of surface EMG signals were acquired from 30 healthy volunteers＇ right forearm flexor respectively in the process of forearm supination （FS） and forearm pronation （FP）.After the raw action surface EMG （ASEMG） signal was decomposed into several sub-signals with wavelet packet transform （WPT）,five fractal dimensions were respectively calculated from the raw signal and four sub-signals by the method based on fuzzy self-similarity.The results show that calculated from the sub-signal in the band 0 to 125 Hz,the fractal dimensions of FS ASEMG signals and FP ASEMG signals distributed in two different regions,and its error rate based on Bayes decision was no more than 2.26%.Therefore,the fractal dimension is an appropriate feature by which an FS ASEMG signal is distinguished from an FP ASEMG signal.展开更多
The immune responses of plants to foreign pathogens have developed relevant defense mechanisms, which formed complicated disease resistant signal transduction pathways. Salicylic acid（SA）, jasmonic acid（JA）/Ethyl...The immune responses of plants to foreign pathogens have developed relevant defense mechanisms, which formed complicated disease resistant signal transduction pathways. Salicylic acid（SA）, jasmonic acid（JA）/Ethylene（ET） and brassi- nosteroid （BR） could trigger the immune response to different pathogens in plants, making the plants show some resistance to the pathogens. The study on the trans- duction pathways of these three disease-resistant signals were introduced to provide some useful suggestions for the study on the transduction of disease-resistant sig- nals in plants.展开更多
文摘Matching pursuits algorithm (MP), as an adaptive signal representation upon overcomplete fundamental waveforms, is a powerful tool in many applications. However, MP suffers from distinguishing a doublet structure. In this paper, the authors proposed an algorithm called compete matching pursuits (CMP), which can overcome this shortcoming and performance very well.
基金The National Natural Science Foundation of China(No.60171006)the National Basic Research Programof China (973 Pro-gram) (No.2005CB724303).
文摘Surface electromyogram （EMG） signals were identified by fractal dimension.Two patterns of surface EMG signals were acquired from 30 healthy volunteers＇ right forearm flexor respectively in the process of forearm supination （FS） and forearm pronation （FP）.After the raw action surface EMG （ASEMG） signal was decomposed into several sub-signals with wavelet packet transform （WPT）,five fractal dimensions were respectively calculated from the raw signal and four sub-signals by the method based on fuzzy self-similarity.The results show that calculated from the sub-signal in the band 0 to 125 Hz,the fractal dimensions of FS ASEMG signals and FP ASEMG signals distributed in two different regions,and its error rate based on Bayes decision was no more than 2.26%.Therefore,the fractal dimension is an appropriate feature by which an FS ASEMG signal is distinguished from an FP ASEMG signal.
基金Supported by the National Natural Science Foundation of China(31360262)Zhuke Contract(2012HK209-38)the Innovation Capacity Platform Construction Project of Guizhou Science and Technology Department(2011018)~~
文摘The immune responses of plants to foreign pathogens have developed relevant defense mechanisms, which formed complicated disease resistant signal transduction pathways. Salicylic acid（SA）, jasmonic acid（JA）/Ethylene（ET） and brassi- nosteroid （BR） could trigger the immune response to different pathogens in plants, making the plants show some resistance to the pathogens. The study on the trans- duction pathways of these three disease-resistant signals were introduced to provide some useful suggestions for the study on the transduction of disease-resistant sig- nals in plants.
