Des , rsa , md5 encrypt algorithms are used when producing registration number , because these algorithms are all open , in order to puzzle cracker , the input and output data of these algorithms should be changed using some cryptographic transformation 在生成注册码的时候使用了des 、 rsa 、 md5加密算法。由于这些算法都是公开的，为了迷惑破解者，需要对des 、 rsa 、 md5加密算法的输入输出数据进行变换处理。
As analyzing the optical spatial filter and frequency domain filter with wavelet transform , the space variable processing > matched filtering and imagery system are the examples . all of these confirm the feasibility of wavelet transform applied in optical information processing 用小波变换处理光学信息，主要的是应用小波的多分辨特性，小波变换的定义是一相关运算，很容易在光学系统中实现，这是光学小波变换的理论依据。
The application of wavelet transform in the spectrum signal processing is studied . the influence of the transform on the gauss spectrum peak is analyzed . a method is proposed to reduce the noise and background in the spectrum signal obtained by the micro spectrometer 研究了采用小波变换来消除光谱信号中的噪声和背景信号的方法，并深入研究了小波变换处理对真实光谱信号的影响，提出了采用小波变换消除光谱高频噪声和低频背景信号的方法。
In order to recognize changes in the running state of vehicle transmission , methods of recognition of break changes by wavelet transformation and recognition of gradual changes by middle threshold de - noising from state data monitoring in time domain are described , and an improved procedure of computing the threshold is described 摘要为识别车辆传动系运行状态的变化，讨论利用小波变换处理传动系监测信号，提取信号在时域的突变特征；利用折中阈值法对监测信号进行消噪处理，从而识别监测信号的渐变趋势，并提出了一种阈值改进方案。
The signal sampling circuit fulfill the tasks of sampling signal and changing the double polarities signal to the single polarity signal ; the drive circuit receives the pwm signals from dsp and pass the signals to ipm through optical - couple devices ; the protective circuit safeguard the system against high current , high voltage , low voltage and high temperature on the ipm model 其中信号处理电路主要完成采集输出电流和中间直流环节电压信号，并对采集到的电流信号进行极性变换处理的功能；驱动电路接收dsp输出的高频驱动信号，通过耦合器件直接驱动ipm模块；保护电路利用采集到电气信号对整个系统实施保护，包括过电流、过电压、欠电压、 ipm模块过热等。
Based on the reference [ 22 ] , the dynamical modeling converters for hvdc system have been transformed to a nonlinear system represented by input - output model with unmodeled dynamics and bounded disturbances , and a robust adaptive output - feedback nonlinear controller is designed . the controller counteracts the uncertain dynamic nonlinearities and bounded disturbances by nonlinear damping terms , and unmodeled dynamics by a dynamic signal 本文在文献[ 22 ]的基础上，对高压直流输电系统换流站动态模型进行变换处理，将其化为一类具有含未建模动态和有界扰动的输入-输出非线性系统，并设计了一种鲁棒自适应输出反馈控制器，利用非线性阻尼项来抑制系统的动态不确定性和有界扰动，引入一动态信号来抑制系统的未建模动态。
Tl1is paper introduced using wavelet ' s well specialty to process ilnage information and changed zero t ] ree lnetllod to complete compression . lt is an active attempt and discuss about information transmis5iiol1 in underwater acoustic channel . basi11g on the practice require , zeio tree lnethod l1as been changed 本研究介绍了以一幅64 64点阵的彩色图像为基础，利用小波的优良特性对图像信息进行变换处理，并使用改变的零树法进行编码，完成数字化彩色图像信号的数据压缩，对在水声信道中传输彩色图像做出积极的尝试和探讨。
Therefore , the image segmentated by a only threshold is not effective on numbers recognition . this text exerts mathematical morpholoy methods on this image and commendably eliminates illumination asymmetry of image . the image after processing by mathematical morphology methods passes throught segmentation by a only threshold and is effective on numbers recognition . this text brings forward a method - relative brightness value processing , the method eliminates illumination asymmetry of image , thins hues of numbers and boosts up the contrast between lines of numbers and background . the image after processing by mathematical morphology methods passes throught segmentation by a only threshold and is effective on numbers recognition 本文运用灰度数学形态学的方法消除图像光照不均匀的现象，处理后的图像再进行阈值分割，很好的提取出号码线条。本文用相对灰度值变换的方法对图像进行变换处理，消除了背景不均匀的现象、细化号码线条、强化了号码线条与背景的对比度。分割出的身份证号码线条细而光滑，很好的满足了身份证号码识别的需要。
