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信号奇异性的小波分析 被引量:2
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作者 梁亚平 王惠珍 任兴民 《弹箭与制导学报》 CSCD 北大核心 2005年第S8期557-559,共3页
提出了利用小波变换对信号奇异性进行定量分析的方法,包括对信号奇异点的定位能力、奇异性的分类能力以及奇异性程度的确定能力三个方面。
关键词 小波变换 异性检测 奇异性分类 LIPSCHITZ 异性指数
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Analysis of Singularity for Reducible Quasi-linear Hyperbolic Systems
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作者 WANGLi-zhen 《Chinese Quarterly Journal of Mathematics》 CSCD 北大核心 2005年第1期10-20,共11页
In this paper we investigate the formation of singularities of hyperbolic systems.Employing the method of parametric coordinates and the existence of the solution of the blow-up system, we prove that the blow-up of cl... In this paper we investigate the formation of singularities of hyperbolic systems.Employing the method of parametric coordinates and the existence of the solution of the blow-up system, we prove that the blow-up of classic solutions is due to the envelope of characteristics of the same family, analyze the geometric properties of the envelope of characteristics and estimate the blowup rates of the solution precisely. 展开更多
关键词 quasi-linear systems strictly hyperbolic systems life span blowup of cusp type the envelope of characteristics
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