Based on the basic principles of dynamical analysis by using finite element method , formulas for back - evaluating the stochastic seismic characteristics of the bedrock from the stochastic seismic characteristics of the ground surface were derived by using the impulse - response function and the principles of fourier transform . a method of back analysis for this purpose is put forward . the example shows that the ground has an obviously amplifying effect for seismic motion 6从有限元动力分析的基本原理出发，利用脉冲响应函数和傅立时变换对原理，推导了由地面地震运动特性反算基岩地震运动特性的反分析计算公式，提出了一种用于由地面地震动特性计算基岩地震动特性的二维有限元反分析方法。
By utilizing the main advantages of orthonormalization and power conservation from hilbert transformation , it is found that bit error rate is close to that of dcsk system , but transmission speed is one time higher than that of dcsk system , and the system ' s output variance is effectively reduced 基于qpsk的思想，引入qcsk调制方式，利用hilbert变换对正交且能量守恒的特性，有效减小了系统输出的方差，较dcsk系统，传输速率提高一倍，系统误比特率与dcsk系统相近。
In the course of measurement of workpiece face runout , variance method of the most species based on separability and image edges distilling based on morphology and marr filtering based on edges segmentation are used to enhance effectively accuracy of image segmentation and edges distilling . accuracy of measurement of face runout is enhanced effectually by use of least square method of compressing rectangle fitting edge of image and transforming of dft 该系统在工件端面跳动测量过程中，采用了基于可分性的最大类间方差法和形态学边缘提取以及基于边界分割的marr算法，使图像分割和边缘提取的准确性得到了很大的提高；用压缩矩形的最小二乘法拟合工件端面图像的边缘以及用dft变换对工件端面的跳动量进行测量，使端面跳动测量的准确性得到了很大的提高。
Through research on principle and approach , this paper puts forward three new methods in power cable fault location . the first method is based on wavelet reconstruction , and the measured signal which is the difference between the faulty and sound phase current under the high voltage pulse excitation , is transformed using wavelet , and the high frequency component is reconstructed at single scale 基于小波重构的电缆故障测距方法采用脉冲电源作用下故障相与健全相的电流差作为测量信号，利用小波变换对其作多尺度分解，然后对信号在高频下进行单支重构。
Images of huanghua pears were acquired by means of machine vision system the method to describe the shape of irregular fruit was studied , in which the fourier transform and fourier inverse transform were applied a sort of software for fruit shape identification based on artificial neural network was developed 利用机器视觉采集黄花梨图像，研究了不规则果品的形状描述方法，提出在黄花梨的分级过程中采用傅立叶变换与傅立叶反变换对来描述果形，开发了基于人工神经网络的果形识别软件。
The results show that setting matrix and geometrical transformation as a selected topic at senior high schools is not only necessary but also feasible . this topic meets the characteristics of students in senior high schools , and can satisfy their development . the results also show that matrix and geometrical transformation can broaden span of view , boost up study interesting , promote development of capability , enhance self - confidence , and build up the ideal and skills of using mathematics finally , several suggestions about the compiling work of new teaching materials and teaching work in practice under new standard were given 其次，本研究进行了“矩阵与几何变换”这一选修专题的试验班教学，对所做教学设计的科学性、所编写教学材料的有效性与适应性进行了实践检验，结果表明，在高中数学课程中开设矩阵与几何变换这一选修专题不仅必要而且可行；矩阵与几何变换这一选修专题的知识既符合学生全面发展的需要，又符合学生的学习特点；发现矩阵与几何变换对学生全面发展所具有的促进作用主要有：能开阔学生视野，增强学习兴趣，增加数学学习的信心，促进学生辩证思维能力的发展，有利于培养学生自觉应用数学的意识与能力等。
Based on the characteristics of human pulse , wavelet transform ( wt ) is originally used to process and analysis it . wavelet analysis has a good qualities both in time domain and frequency domain and is an ideal tool in analyzing unsteady signal , so it is used to detect the singularity of human pulse and extract the features of human pulse in time - domain . human pulse is characterized by a new feature which is the energy of its wavelet transform in different scales 本文将小波分析理论应用于脉象信号的分析和处理，讨论了小波变换对脉象信号除噪的效果，利用小波分析所具有良好的时-频同时局部化的能力和对非平稳信号突变点的检测能力对脉象信号进行了分析和时域特征值的提取，并提取了脉象信号的小波变换在不同尺度上的能量这一新的表征脉象的特征参数。
The fusion method based discrete wavelet transform ( dwt ) is also discussed . dwt is sensitivity to shift variant signal which means that a simple integer shift of the input signal will usually result in a nontrivial modification of the decomposed coefficients . thus an image fusion scheme based on the discrete wavelet transform will also be shift dependent , which is undesirable in practical image fusion process 本文接着对基于小波变换的多聚焦融图像合方法进行了深入研究,针对小波变换对信号平移变换的敏感性,本文还提出了一种基于小波帧变换的多聚焦图像融合方法,研究了变换系数活跃度测量、变换系数融合方法等问题。
This paper presents the reliability analysis of three systems as following by using markov process theory and linear equation theory . ( 1 ) multi - sensor 2 / 3 ( g ) repairable decision - making system ( 2 ) cold standby repairable system of two components with continuous lifetime switch and priority ( 3 ) warm standby repairable system of two components with continuous lifetime switch and priority in this paper , we take an application of multi - sensor fusion in neural network , and set up the mathematic model of 2 / 3 ( g ) repairable decision - making system , which is composed of different components 本文利用马尔可夫过程理论、线性方程组理论以及laplace变换和laplace逆变换对以下三个系统做了可靠性分析： ( 1 )多传感器融合可修2 3 ( g )表决系统( 2 )有优先权的开关寿命连续型两个不同型部件冷贮备可修系统( 3 )有优先权的开关寿命连续型两个不同型部件温贮备可修系统多传感器融合技术是近几年发展起来的一门新兴技术，已广泛应用于军事领域，并逐渐在航天、遥感、机械制造技术中得到应用。
