查询词典 compression of data

Firstly, the thesis introduced the development of VOD, the background and meaning of the program, then the author introduced the associated technology, mainly including the feature of multimedia, video compression technology and the protocols SCTP and RTP. Considering the ambulant of host , fluctuation of bandwidth,high error rate data in wireless networks ,the author proposed some QoS strategy in the wireless networks such as RTP/SCTP protocol stack , connection control of the server, two buffers in the client end point.,TFC congestion control algorithms ,etc. Based these strategies, the team members gives the software and hardware solution of the wireless video-on-demand system and gives the main modules design of the software system. The system adopted the C/S structure including two parts: server and client ,using the Mpeg-2 which is apporiate for networks as the supported format. The thesis emphatically researches on the video-serving module of the server and the sink module, player module of client.

本文首先介绍了视频点播系统的发展现状、课题的研究背景和意义；接着对课题的相关技术进行概述主要包括了多媒体特点，压缩技术，传输协议SCTP以及RTP；针对无线环境的节点移动性，带宽波动性，数据错误率高等三大特点，作者研究设计了无线环境下的QoS策略：RTP/SCTP协议栈，服务器准入控制机制，客户端双缓冲区，TFRC拥塞控制机制等；在这些策略的基础上设计了系统的软硬件解决方案，并对软件体系结构的主要模块进行了设计，整个视频点播系统采用C/S结构，由服务器，客户端2个部分组成，使用适合网络传输的流媒体格式Mpeg-2作为系统支持的格式，文中重点研究了服务器的视频服务模块以及客户端的接收模块和播放器模块，并利用线程池技术对系统进行实现。

TC 3.0.-realized by the data compression "arithmetic coding" of the ...

本程序实现了数据压缩中"算术编码"的全过程。

Wavelet are considered to be a powerful tool both in function representation and data compression, so it is natural to adopt wavelet as tool of compressing geometry data.

小波被认为是进行数据压缩的有力工具，因此将小波用于几何压缩也就是自然而然的事。

Deep researches on relative key technologies of image database, including partitioning, coding and index of image block, query and visualization of image data, image data compression and etc.

深入研究了影像数据库相关的一些关键技术：影像块的划分、编码与索引机制、影像数据的可视化与查询及影像数据库的数据压缩等。

Finally, a data compression method is presented that compresses the raw SAR data by means of wavelet transform and vector quantizer.

一种用小波变换对星载SAR原始数据进行压缩的方法，结果表明，与传统的方法相比，由该方法压缩后的原始数据生成的SAR图像具有更大的信噪比。

After having a data compression algorithm in the transmission system, we could display 3D data with a refresh rate of 2.63HZ.

在成功加载压缩算法之后，系统理论可以达到2.63HZ三维图像刷新率，为下一代实时系统的研制奠定了一定的基础。

In the development of SRFM, through such image processing techniques as linear hue transformation, image liminal division and eliminating noises by adjacent field averaging and such data processing method as high speed data compression as well as arranging the procedure of eliminating noises after image division, the precision and performance of responding in real time are guaranteed.

在系统的研制中，通过综合运用线性灰度变换、图像阈值分割以及邻域平均法滤波等多种图像处理技术和高速数据压缩等数据处理算法，并采用了将滤波环节放在图像分割之后进行的图像处理顺序，保证了系统剔除的准确性和实时性。

In land areas with highvelocity rock outcrops,the seismic data recorded by vertical geophone deviate from the data of reflected compression wave with the increment of dip angle of strata and incident angle of reflection wave,which results in the difficulties of conventional seismic exploration in the near-surface high-velocity rock outcropped areas.

结果表明，当近地表速度为低速时，可以将垂直检波器记录的地震记录近似等同于反射纵波记录，这就是常规地震勘探在低速带区勘探取得成功的原因之一；当近地表速度为高速时，随着界面倾角和入射角的增加，垂直检波器记录的地震记录等效为反射纵波记录的误差增大，这就是存在高速近地表区地震勘探的难点之一。

The apparent advantage of the method is to establish statistics codebooks for various image data,and each treating need not generate codebooks with a high coding efficient achieved, while it can apply to any opportunity with wavelet transformation used in various image and signal data compression.

其最大优点是能够建立适合各种复杂图象数据的统计码本，不必每次处理都要产生码本，极大地提高了编码效率，能应用于小

For frequency information fluid identification technology:the basic theory of fluid identification based on frequency information has been introduced,for inner and external factor affecting frequency,some steps have been proposed to attain reserved amplitude and frequency analysis data with high resolution,high S/N ratio;through the comparison of time-frequency analysis method, the high accuracy time-frequency analysis method has been selected to extract time-frequency attributes;the analysis method flow of common single frequency fluid identification has been proposed,according to the data of full frequency band,several anomaly zone modes of common single frequency attribute have segregated; incorporating converted wave and compression wave,fluid identification method based on PS wave combined time-frequency analysis has been proposed;the AVO property of various fluid type in frequency domain has been studied;the generalized fourier analysis method,Proni absorption filter has been introduced,and researched for anti-noise and for the seismic processing interpretation flow.The above technology have been applied to fluid identification of organic reef in WBT area in the east of Sichuan and fluid identification of clastic rock in GUANGAN area in the middle of Sichuan,the results show that the above methods are effective.

基于频率信息的流体识别技术方面：介绍了利用频率信息流体识别的基本理论，针对影响频率的内、外在因素，提出一些针对措施，以获得高分辨率、高信噪比的保幅、保频分析数据；通过时频分析方法的比较，选取高精度的时频分析方法提取时频属性；提出共单频属性进行流体识别的分析方法流程，结合全频带数据，分出几种共单频属性异常带模式；联合转换波资料和纵波资料，提出基于纵横波联合时频分析进行流体识别方法；研究了频率域内不同流体类型AVO现象；引进一种广义傅立叶分析方法：Proni吸收滤波，研究其抗噪性以及进行地震处理解释的流程；将这些技术应用川东北五百梯区块进行生物礁储层流体的识别和川中广安陆相碎屑岩的流体识别，取得较好的效果。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。