查询词典 laplace transform

The algorithm and application to unstationary signal analysis are distussed with wavelet transform in order to overcome defect of Fourier transform only applied to stationary signal analysis on frequency domain.

论文针对传统Fourier变换只能在频域上对稳定信号进行分析的不足，探讨了利用小波变换进行非平稳信号分析的算法和应用，并在两者之间做了比较。

In this paper firstly both the fundamental principle of wavelet transform and decomposing the signal with wavelet transform are introduced.

从小波变换的理论背景出发，介绍了利用小波变换对信号进行分解的原理。

Then a novel feature extraction method of warship radio noise using Dopplerlet transform is proposed, and the decompounded flow of the Dopplerlet transform based on evolutionary programming is raised.

基于此，提出了一种基于Dopplerlet变换的舰船辐射噪声特征提取方法，给出了基于进化规划算法的Dopplerlet变换分解流程。

A new method of coordinate transform based on recursion was proposed,and was compared with the traditional and iterated method of coordinate transform.

提出了一种递推的坐标转换方法，并与传统的坐标转换方法和基于迭代的坐标转换方法进行了比较。

Remote sensing image was decompressed into frequency domain image by wavelet transform and the bit planes in frequency domain image were permuted by SBI transform seperately. The resulting data was compressed by arithmetic encoder.

采用小波变换对遥感图像进行分解，将生成的频域数据按不同比特平面分别进行SBI变换并用算术编码进行压缩。

The basic theory of remote watching system for an unmanned substation is introduced. The necessity of image compaction in dada transmission, the theory of 2?dimension wavelet transform, and Mallat algorithm are also explained. Based on that, the method for reconstituting the site image with the original picture and the effective area,which is compacted by the wavelet transform and transmitted to dispatch center, is analyzed.

介绍了无人值守变电站遥视系统的基本组成原理，阐明了压缩传输图像的必要性，论述了二维小波变换的原理与Mallat算法，在此基础上，着重分析了利用二维小波变换压缩传递图像的有效区域并传至调度中心与底图重构出现场实况的方法。

In comparison with the drawbacks related to the Fourier Transform and Smoothed Instantaneous Wave Energy History(SIWEH, the Wavelet Transform will be show to be much better suited for analyzing wave shoaling In which signal is believed to be non-stationary and wide band.

在使用小波转换作为分析波浪工具之前，我们选择 Morlet wavelet、Paul wavelet与Gaussian三种型态之小波函数进行讨论，最终考虑视窗面积之大小、复数型态之小波函数及频率视窗的集中度，而以 Morlet wavelet较适合分析波浪。

This article attempts to attain the research goal that is identifying the ecotypes of wet lands located at the source of Yellow River on the basis of the operation of slicing which was imposed on NDVI ,TM4 and the wetness component derived from the Tasseled cap transform and the operation of classification which was implemented based on the characteristic images coming from LBV transform.

本文尝试基于NDVI，TM4，缨帽变换湿度分量进行密度分割和基于LBV变换图像进行分类的方法达到识别黄河河源湿地生态类型的研究目标。

For the process of preparation of lanolin acid from the calcium soap, transform reaction of the calcium soap and extraction of lanolin acid carried simultaneously through, then that the reation velocity was improved and the transform degree and production quality were increased.

对羊毛酸钙转化制取羊毛酸过程，采用了羊毛酸钙转化反应与羊毛酸的萃取过程同时进行的方案，不仅提高了反应速度，同时也提高了羊毛酸的转化率和产品质量。

Then based on CWMS, we propose a new method to enhance the resolution of seismic traces. Firstly, we divide the seismic signal into proper segments by Gabor molecule-windows adaptive to the signal, where each segment is regarded stationary, and then transform it into the Gabor domain. Secondly, we deal with the amplitude spectrum for each segment to expand the frequency band of the spectrum in the Gabor domain. Finally, taking inverse Gabor transform on modified time-frequency coefficients, we get the high-resolution signal.

然后基于变子波模型，提出了一种新的提高地震记录分辨率的方法：第一步，用自适应于地震记录的Gabor分子窗把地震记录恰当地划分成若干片断，每段内信号近似平稳，然后将地震记录变换到时间-频率域；第二步，在变换域对每个分子窗内信号的振幅谱进行处理以拓宽频带；最后把处理后的时间-频率域函数反变换回时间域得到提高分辨率后的结果。

The two-acre Dunbar Community Garden in Little Rock has served as a model for several years.

几年来，坐落于小石城，占地两英亩的邓巴社区菜园树立了一个标杆。

Jerry points to the jacket hanging in the bathroom. It's ruined, and unwearable What?

杰瑞指着洗手间里挂着的夹克，毁了，不能穿了）什么？