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- In the end,the statistics of the operational volume of wavelet de noising is made. 最后对小波去噪的运算量进行了统计 .
- It has been proved that the wavelet packet de noising is an effective method prior to wavelet de noising. 仿真结果表明 ,基于平均阈值的小波包去噪是一种有效的去噪方法 ,其效果优于小波去噪
- To find the best scheme of wavelet de noising,various parameters that influence the performance of wavelet de noising are studied in this paper. 为了找到最佳的小波去噪方案 ;本文对各种影响小波去噪性能的参数作了比较研究 .
- In order to improve the alarm accuracy rate in nuclear power station, this paper adopts Wavelet De noising (WD) method based on statistic characteristics and presents a loose parts alarm method. 针对核电站中检测跌落零件误报警率高的问题，本文对带通滤波后的跌落零件冲击信号应用了基于统计特征的小波去噪方法，并给出了去噪后的跌落零件报警方法。
- By use of wavelet decomposition reconstruction algorithm, the vibration signal is de noised and the signal noise rate is improved, the loss is low. 利用小波分解重构算法 ,对振动测试信号进行去噪处理 ,改善测试信号的信噪比 ,减少信号损失。
- Finally, the de noised image was obtained as the sum of the two processed parts. 两组分别去噪后的小波包系数经反变换回到时域并相加 ;得到消除了噪声的图像 .
- The application of de noising by soft thresholding on wavelet transform to ultrasonic detection echo is discussed. 研究小波变换软阈值去噪方法在超声检测回波处理中的应用。
- This paper presented a new method based on nonlinear wavelet transform to image de noising. 提出一种新的非线性小波变换去噪方法 .
- In this paper,mean threshold is presented on which wavelet packet de noising is studied. 文中提出了平均阈值的概念 ;并在此基础上研究了小波包去噪的效果 .
- In analytical chemistry,wavelet transform has been mainly utilized for signal smoothing,de noising and compression. 在分析化学领域中,小波分析也逐渐应用于去噪与平滑、数据压缩等方面。
- The result indicates that the wavelet transform has practical value in the performance of de noising and real time processing. 结果表明 ;小波变换在去噪性能和实时处理方面均具有实用价值 .
- After making discrete stationary wavelet transform to an infrared image, de noising is done in the high frequency sub bands with better resolution. 对红外图像进行离散平稳小波变换后 ,对分辨率较好的各高频子带直接利用所提出的去噪方法去噪 ;
- The one dimension wavelet transform was introduced and the method of the hard threshold and the soft threshold that is used in wavelet de noising. Four kinds of rules of assessing threshold are given. 介绍了一维小波变换和用于小波去噪的硬门限和软门限处理方法 ;给出了4种门限估算准则 .
- This paper illustrates a method to de noise of radar weak signal. 通过建立尺度空间新内积、新范数的方法来构造新型小波变换 ;并且实现了用该系列小波变换对雷达弱信号去噪的目的 .
- In performance and visual quality, the algorithm is better than the wavelet de?noising based on discrete orthogonal wavelet transform and the conditional median value filtering method. ? 算法在性能指标和视觉质量上均优于基于离散正交小波变换的阈值去噪方法和传统的中值滤波法。
- Then an improved method, namely translation invariant de noising was proposed. 在此基础上 ,探讨了对传统的阈值方法的改进 ,即平移不变小波变换去噪法。
- This paper discusses some common issues in the applications of transient signal analysis, such as transient signal detection, de noise, data compression and locating. The mother wavelet option method is studied. 讨论了电力系统中常见的暂态信号分析应用 ,如电力暂态信号检测、去噪与数据压缩以及暂态信号定位等 ,对这些应用中小波基的选择原则进行了系统的分析研究。
- Three high frequency parts from wavelet transforms are turned into spherical coordinate, in which it applies the method to image de noising by the wavelet shrinkage parameters based on statistical characteristics. 该方法把线性小波变换后得到的 3个高频分量通过球坐标变换后 ;得到球坐标下 3个分量 ;然后在球坐标中根据图像统计特性设定的收缩因子处理小波收缩去噪 .
- Tests indicate that WD restrains noise disturbance efficiently and makes it easy to distinguish de noised loose parts impact signals from complicate background noise to implement loose parts alarm favorably. 实验表明，小波去噪有效地抑制了噪声干扰，使得小波消噪后的跌落零件冲击信号与复杂背景噪声信号易于区分，从而利于实现对跌落零件的报警。
- Compared with[1],the proposed algorithm can be realized without the a priori knowledge about source directions and de noising preprocessing. 与文献 [1]不同 ;算法的实现不需要方位估计的先验知识和协方差矩阵的去噪预处理 .
