查询词典 wavelet

Taking advantage of retractility and time-delay characteristics of wavelet, this paper solves the problems of fixed resolving power and large redundance of the information caused by traditional sonogram analysis by choosing the scale of wavelet correctly.

本文将离散小波变换应用于蝙蝠回声定位叫声的分析中，利用小波的伸缩和时移特性，通过对小波尺度的适当离散，解决了传统语谱分析的分辨率固定、信息冗余量大的问题。

So it can be avoided that the computation accuracy is lowered and the calculation result is hard to be convergent for the odd state of transformation matrix.The computation accuracy of wavelet Ritz method and wavelet Galerkin method has been improved so the special'microscopic'property could be fully expressed. An effective method is offered also to solve the problem of high stress gradient and some other odd state problems in engineering.

从而避免了由于转换矩阵奇异而造成精度下降且计算结果不易收敛的问题，提升了小波Ritz法和小波Galerkin法的求解精度，使小波分析的"显微"特性得以充分发挥，并为应力大梯度问题和工程奇异问题的有效求解提供了强有力的计算手段。

And then we demarcated the saltation time and starting time of this travelling wave respectively by the first kind of cubic B-spline wavelet and the second kind of cubic B-spline wavelet.

由于行波各频率分量在线路中的传播速度是不同的，而我们所检测到的行波浪涌并非行波的最高频率分量，所以必须选取与所检测到的行波浪涌相吻合的波速。

The fast algorithm of discrete wavelet transform ensures that the wavelet transform is widely applied in signal processing. In the algorithm, the computation of values on sample space is very important.

离散小波变换快速算法使得小波变换在信号处理领域得到广泛应用，其中抽样空间上测量值的求取是快速算法中的重要步骤。

It is found that the internal relation between the wavelet method and multi-scale representation will determine the law by which the graphic information varies following the change of the scale. That work mark a new step towards the successful application of wavelet theory in the automatic map generalization and provide a new basis and mechanism for the multi-scale representation in GIS.

发现了小波理论与GIS图形数据多比例表达之间的内在联系，挖掘出GIS图形数据中一些信息随尺度的变化规律，因而为利用小波理论来解决GIS图形数据多比例尺表达中的问题作出了一些基础性工作，为GIS图形数据多比例尺表达和自动制图综合找到了新的数学机制和依据，使这项工作的在自动化、模型化、数量化、客观化的方向上又迈出一步。

For improving optical wavelet transform,optical separable wavelet transform is proposed.

为改进光学小波变换，提出了光学可分离小波变换的概念。

Keywords polarization;polarimetric SAR;classification;projection index;wavelet-kernel estimation;Bootstrap estimation;sequential projection pursuit cluster model;projection pursuit wavelet learning network;mix

Article From 西北工业大学；计算机科学与技术博士论文 2007年度极化；极化合成孔径雷达；分类；投影指标；小波估计； Bootstrap估计；序列投影寻踪聚类模型；投影寻踪子波学习网络；混合Wishart模型

Using wavelet decomposition and reconstruction, image enhancement and integration, the flexibility to choose other wavelet is simp...

利用小波分解与重构，实现图像增强和融合，可灵活选用其他小波，简单易懂，特别适合小波初学者。

With the launching on the spectrum of wavelet, the harmonic wavelet is structured, which has strict box-like spectrum and simple function expression.

利用小波的频谱特性，构造了具有严格盒形谱特性及简单解析表达式的谐波小波，严格推导得到了基于FFT的二进谐波小波快速算法。

The substitution is made of the interval wavelet basis for the compact one in order toproduce the basis of Sobolev space with the lower condition number,which will improvethe speed and the accuracy of the linear system made by wavelet Galerkin method.

我们在小波Galerkin法中用区间小波替代J.Xu用的I.Daubechies的紧支正交小波来生成Sobolev空间及H1的小波基，使基的相关性大大减小，进一步使刚度矩阵的条件数减少，从而提高了线性方程组求解的速度和精度。

After explaining total design of automated test system for microcircuit , the thesis introduces GPIB standard .

文章在说明了微电路模块自动测试系统的总体设计后，对GPIB标准进行了介绍。

He interceded in my behalf.

他替我说情。