重要期刊的摘要范例.doc

基于 Gabor 变换的欠定盲信号分离新方法 DOI : 中文关键词: 非平稳信号; 欠定;Gabor 变换; 盲信号分离英文关键词:Non-stationary signal under-determined mixtures Gabor transform blind source separation 基金项目: 作者单位申永军,张光明,杨绍普摘要点击次数: 12 全文下载次数:2 中文摘要: 结合 Gabor 变换和盲信号分离的各自优点, 提出了一种基于 Gabor 变换的欠定盲信号分离新方法。首先通过混合信号的 Gabor 变换系数之间的相互关系, 得到了源信号个数的估计; 然后对 Gabor 变换后的信号进行阈值处理, 并进行 Gabor 逆变换得到新的混合信号, 从而实现混合信号的升维。再利用现有的盲信号分离方法进行处理, 该方法不受源信号个数的限制, 因此属于一种欠定盲信号分离方法;最后, 通过一组仿真信号的欠定盲分离验证了该方法的有效性。英文摘要:A new method of blind source separation (BSS) is proposed in under-determined mixtures based on Gabor transform, and bines the advantages of Gabor transform and BSS. Firstly, one can obtain the estimate for the number of source signals by the ratios of the coefficients of the mixed signals in Gabor transform field. Then, the appropriate threshold values are selected to process the Gabor transform coefficients, and the inverse Gabor transform is applied to the revised signals. This obtains binations of source signals to increase the dimensions of mixed signals. Moreover, the existing BSS methods, such as JADE, can be applied to the new mixed signals with the existing mixed ones, and one can obtain the separated source signals. The effectivity of the method is verified by some simulated signals. 混凝土结构复杂缺陷的 SWRI 诊断技术 DOI : 中文关键词: 混凝土; 缺陷检测; 成像技术; 反射英文关键词:Concrete damage detection imaging techniques reflection 基金项目: 作者单位骆英,李忠芳摘要点击次数: 31 全文下载次数: 11 中文摘