查询词典 wavelet

A Wavelet analysis is far superior to Fourier analysis in drawing out the signal features. Wavelet analysis has the characteristic of spatial locality, and the window wideness of the time and the frequency both can be adjusted, so it can analyze the details of a signal.

a 小波分析在信号的特征提取方面具有传统Fourier 分析无可比拟的优越性，小波分析在时频域都具有表征信号局部特征的能力，能够聚焦到信号的细节。

In this thesis wavelet transform is used to get rid of yawp and other disturbance and the wavelet transform is modified.

课题中利用小波变换滤除噪声和探头晃动造成的干扰，采用改进的小波滤噪方法。

The fast wavelet transforms algorithm based on FFT and the Atrous algorithm has high computational efficiency, is easy to be realized with hardware and to extract features, and the size of the wavelet coefficient matrix is the same to that of the original image.

基于FFT和多孔算法的小波快速变换算法，具有计算效率高、易于硬件实现，并且计算后的小波系数矩阵大小和原图像一样，易于提取特征。

Based on consider hereinbefore, this dissertation discusses several aspects on the problem of the sustainable and optimum exploitation of groundwater resources as follows:①reviewed entirely the origin and evolvement of the concept "sustainable development", stated and commented the study status in queue on"sustainable development"around national and international range, thorough discussed the science connotation about the concept "sustainable development";②looked back and commented across-the aboard some furthest basic concept and proposition related to groundwater resources, put forward self opinions on a few existent mistake points of view and chaos understandings;③expatiated entirely on the content and meaning of the theory of changeable groundwater resources system, contrast with the traditional methods of groundwater resources calculation and evaluation, combined example to show the application of this theory;④thorough analyzed the difficult and complexity to forecast the groundwater resources, fully stated the traditional methods of groundwater resources forecasting, pointed out the characteristic and applying condition of these forecasting method, introduced the main ideas and methods of wavelet analysis developed recently, and the MATLAB software be known as the fifths era computer language, and its accessory wavelet analysis toolbox, applied these methods and tools to analyze the groundwater dynamic curve, adopted the B-J method and Morte-Carlo method, combined with the theory of changeable groundwater resources system, discussed the new view on the forecast of groundwater resources;⑤synthetically analyzed the characteristics and limitations of the present all kind of groundwater manage model, combined mathematical programming, mathematical statistics, random process and the theory of variation system of groundwater resources on the unite optimum attempter of surface water and groundwater, emphasized how to make the model more nicety, more simple, more practicality;⑥analyzed the inside condition and outside condition to assure the sustainable and optimum exploitation of groundwater resources, the inside conditions are the follows: correct resources idea, scientific methods of resources calculation and evaluation, credible forecast methods of resources, exercisable measures of resources management, the outside conditions are the follows: the development idea of high layer, the transform of manage system, the matched policy and rule of law, the adjusted of economy lever, the improve of cultural diathesis, the boosting up of water-saving consciousness and detail measures, the control of population rising, the prevention and cure of water pollute, the renew and rebuild of ecology;⑦scan the sustainable and optimum exploitation of groundwater resources from the high level of metagalaxy, earth system science, and philosophy;⑧point out the more directions on groundwater resources.

它将为制定水资源的可持续发展目标和战略决策提供科学依据，为制定社会、经济可持续发展战略提供理论基础。基于以上考虑，论文主要从以下几方面对地下水资源可持续开发问题进行了比较深入的探讨：①全面回顾了&可持续发展&概念的由来与演变，对国内外&可持续发展&的研究现状进行了述评，并对&可持续发展&概念的科学内涵进行了深入探讨；②对涉及地下水资源的一些最基本的概念和命题进行了全面的回顾和评述，对目前仍然存在的一些错误观点和混乱认识提出了自己的见解；③全面阐述了地下水资源变值系统理论的内容和意义，并与传统的地下水资源计算评价方法进行了对比分析，结合实例具体说明了方法的应用；④深入分析了地下水资源预测预报工作的极端重要性和复杂性，对传统的地下水资源动态预测方法进行了全面的评述，指出了各类预测预报方法的特点及适用条件，对最近二十多年刚发展起来的小波分析技术的主要思想和方法及其应用范围，以及号称第五代计算机语言的MATLAB软件和附带的小波分析工具箱进行了介绍，并应用于地下水动态过程线的分析，采用时间序列中的B-J法，蒙特卡罗方法，与地下水资源变值系统理论相结合，探讨了地下水动态资料分析和地下水资源预测预报的新思路；⑤综合分析了现今各类地下水管理模型的特点及缺陷，将数学规划、数理统计、随机过程等与地下水变值系统理论相结合进行地表水地下水或多水源的联合优化调度，使模型更准确、更实用；⑥对保证地下水资源可持续开发的内部条件和外部条件进行了分析，内部条件主要是正确的资源观，科学的资源计算与评价方法，可靠的资源预测预报技术，可操作的资源管理措施，外部条件主要是高层发展思路、管理体制的变革、配套的政策法规、经济杠杆的调节、人文素质的提高、节水意识的增强及具体节水措施、人口增长的控制、水体污染的防治、生态的恢复和重建等；⑦从宇宙科学、地球系统科学及哲学的高度审视地下水资源的可持续开发；⑧指出了地下水资源可持续开发的进一步研究方向。

New multiscale methods can give better performance in approximating multivariate function in high-dimension space than wavelet analysis.6. A method for texture classification is presented based on Brushlet and dyadic wavelet.

该方法从矩特征和方向信息特征出发，结合Brushlet变换的方向检测特性和二进小波变换的边缘检测特性，最后利用支撑矢量机对纹理图像进行分类。

Based on analyzing and comparing the constringent performance of CDF(2,2) and FBI9-7 wavelet, we verify that "there is no wavelet that consistently performs better than all the other wavelets on all the test images."

并通过在自适应算术编码前，重组SPIHT算法后的码流，使本方案中的图象压缩比有进一步的提高。

The cylindricity could be calculated by least squares method and wavelet error separation method that the measurement error could be decomposed by Harmonic analysis algorithm based on wavelet theory.

针对激光 CCD 灵敏度高，干扰噪声容易混入测量数据中的问题，提出了一种基于小波分析的误差分离方法，即运用谐波分析的思想方法和小波理论中多频率分析算法进行误差分离，误差分离后的数据用最小二乘法处理求出圆柱度。

4This paper expounds the basic theory of wavelet transform, makes use of the characteristic of wavelet multi-resolution to delaminate the image and explain in detail the existing problems in matching.

4阐述小波变换的基本理论，利用小波多分辨率的特性对图像进行分层匹配，对小波匹配中的若干问题进行详细的阐述。

This paper researches the wavelet transform of discrete-time sequences basing on dendriform filer banks in the signal processing field, analyses the theory and design method of two channel conjugate quadrature mirror filter banks and fast implement of discrete orthogonal wavelet transform and generation of orthogonal wavelets, and points out the internal relationship between them.

笔者从信号处理的角度研究了离散时间序列的小波变换利用树状滤波器组实现的方法，分析了两通道共轭正交镜象滤波器组理论及滤波器设计，离散时间序列的正交小波变换的快速实现以及正交小波的构造，指出了其内在联系，最后举例说明了正交小波变换通过共轭正交镜象滤波器组来实现信号分解和重构的全过程。

The invention discloses a construction method of biorthogonal wavelet, which is based on Bernstein base and comprises the following steps that:(1) a lowpass filter at a discomposing and reconstructing end is expressed by Bernstein base;(2) numerical calculation of the lowpass filter is carried out;(3) the lowpass filter at the discomposing and reconstructing end is led to meet the conditions to reconstruct the lowpass filter entirely;(4) the parameter of obtained biorthogonal wavelet is calculated.

本发明公开了一种基于Bernstein基的双正交小波构造方法，包括如下步骤：(1)将分解与重构端的低通滤波器用Bernstein基来表示；(2)进行低通滤波器的数值计算；(3)使分解与重构端的滤波器满足完全重构滤波器的条件；(4)计算获得双正交小波的参数。

Looking to bounce back from defeat against Cesena last weekend, the Calabrian boss will be sticking to his tried and tested 4-3-3, with Lopez and Sedivic joined up front in Giampaolo's absence by either Nanni or Plasmati.

鉴于上周末对切塞纳的比赛中反败为胜，这支南方球队将会更坚持其一贯而有效的4-3-3阵型，洛佩斯和塞德维奇将取代受伤缺席的詹保罗，和纳尼或者帕斯马蒂中的一个搭档锋线。

Meanwhile, their exposure to the more freewheeling ways of the West broadened dramatically.

另外，西方较自由的生活方式对年轻人的影响增大。