查询词典 ravine stream

Audio and video steams accord with MPEG-2 standard can form PES after packeted, and then PES steam can form tranport stream after multiplexer. The transmitter conduct a number of transport stream multiplexing ,then send out the signal via satellite,cable or terrestrial transmitting station.The end user receiver picks up the DTV signal,demultiplexes it and finally the MPEG-2 decoder presents the decoded audio and video stream to the user.

按MPEG-2标准编码后的音频视频流经打包之后形成打包基本流，PES经过复用之后形成传输流，发射端进行多个传输流复用，最后通过卫星、有线电视及开路电视等不同媒介传输方式进行传输；接收端经信号接收，解复用，解码后显示给用户原先的音、视频节目。

On his way back to his native city he met a weak old woman waiting to be helped across a mountain stream.kind and polite,jason carried the old lady on his back and walked across the stream.little had he thought that the old woman was just hera herself .thus he got the help and protection of a power fulfriend at the beginning of his life.as he lost one shoe in the stream he had to enter pelias'' palace in only one shoe.

在返回祖国的路上，他遇到一位老婆婆。她希望能有人帮她渡过山里的一条小溪。出于善良的天性和谦恭有礼的本能，杰森背起老人，淌过了小溪。他并未想到这位老婆婆竟是赫拉本人。因此他在生活的起点便得到了一位神通广大的朋友的帮助和保护。由于他在过河时遗失了一只鞋子，他不得不赤着一只脚走进了珀利阿斯的宫殿。

Firstly,the wavelet-based contourlet coding using an SPIHT-like algorithm is utilized on the plain image,and as a result,the compressed datum stream could be achieved which is then mapped to a 3D bit matrix. Afterward,a chaotic sequence is generated by Lorenz chaotic map,and it is preprocessed to a bit sequence which is used to permute and substitute the elements of the 3D bit matrix achieved above. In the end,the processed 3D matrix is mapped back to datum stream,and the encrypted compressed image could be achieved if decoding and inverse transform are performed on the datum stream.

首先采用基于小波的Contourlet变换的类等级树集合分割编码算法对明文图像进行压缩，得到压缩数据流，然后将压缩数据流映射为一个三维位矩阵；利用Lorenz混沌映射产生混沌序列，并对其进行预处理得到比特值序列，根据比特值序列对上述三维位矩阵进行置乱和替代操作；将置乱和替代后的位矩阵重新映射为数据流，并对其进行解码和反变换操作，得到加密后的压缩图像。

This thesis introduce the concept, character, and domestic and foreign circumstance of modern distance learning, analyze the possibility of developping distance learning, clarify the character and requirement of modern distance learning, after that using stream media technology to analyze the theory of technology, research the realization of stream media and the synchronization video courseware with teach planning and the encryptting method of stream file. At the end of this thesis, it research software and hardware system of distance learning, choose the phototype of the system, research system structure, flow and character.

本课题首先介绍了现代远程教育的概念、特点以及国内外现状，并对我国大力发展现代远程教育的可行性进行分析，明确现代远程教育的特点及需求，然后以流媒体为主要技术手段，分析技术原理，研究流式传输的技术实现、视频课件与教案的同步以及视频流文件的加密方法，最后对远程教育的软件、硬件平台进行研究，对系统进行选型，研究系统的结构、流程及特点，对使用到的MicrosoftWindowsMedia技术进行重点研究，然后提出流媒体的传送与播放的关键步骤，从而给出基于WindowsMediaService的远程教育系统，最后分析了基于流媒体技术的远程教育的特点。

A review of river management history in various countries is used in this thesis to discuss the future development trends of river management and the relationship between river health and river management.Based on the characterization and assessment of river health, Five components of stream condition are presented in this thesis to characterize river health: water quality, aquatic life, physical form, hydrology and streamside zone. It is obtained by comparing the methods and criteria that have been developed by others and reviewing the river assessment practices in various countries. Accounting for the features of urbanization region in plain river network, an indicator system for river health assessment which provides scores for 5 subindices and 17 indicators is established. With almost 200 stream reaches in Shanghai as objective of study and Liwa stream and Zhangjiabang Creek as case study, the application of river health assessment in the planning, baseline survey and post-project appraisal of river management is explored by collecting historical literature and field monitoring. Consequently, some suggestions to improve river management effectiveness are presented from the angle of river health.

本文回顾河流管理漫长历程并指出当前国际发展趋势，进而辨析河流健康状况与河流管理的关系；以河流健康状况的表征和评价为核心，通过对国外RIVPACS、AUSRIVAS、IBI、RCE、ISC等河流健康状况评价方法的分析和比较，以及对美国、英国、澳大利亚、南非等国家河流健康状况评价实践的总结，尝试从理化参数、生物指标、形态结构、水文特征、河岸带状况5个方面全面表征河流健康状况；结合中国东部平原河网地区自身特点，通过评价原则、评价指标、评价标准、评价权重确定等步骤，初步构建了包含河流水文、河流形态、河岸带状况、河流水质以及河流生物5个一级指标(共17个指标)的河流健康状况评价指标体系；在此基础上，采用资料收集与现场实测相结合的方法，以上海近200条中心河道为研究对象，以丽娃河和张家浜为典型案例，分别就河流健康状况在河流管理规划、现状评估以及后评估中的应用进行实证研究，并尝试探讨如何从这三个阶段利用河流健康状况评估改进河流管理的对策。

If a stream is writable, writing at the end of the stream expands the stream.

如果流是可写的，则在流的末尾写入将使该流扩展。

Presently narcissus stopped to drink from alittle stream.kneeling down on the bank,he saw alovely face in the clear water.你好s heart gave abeat.he smiled and was smiled back to.t你好nking that it must be amaiden in love with 你好m,he bent down to kiss her.and her lips also drew near 你好s.but as soon ashe touched the clear surface the lovely face disappeared.the angry youth was now desperate.never had he been looked downupon like that before.day and night,he stayed at the stream without drinking and eating.before long he died,never suspecting that 你好s maiden was just 你好s own image in the stream.the gods took pity on the fair dead body and turned it into aflower bearing 你好s name.

不久，那西塞斯降临一条小溪边饮水当他跪在岸边时，他发现清亮的溪水中有一张非常可爱的面庞他非常冲动，并对于着水中的人微笑，水中人也给了他一个微笑他认为，一定是一位女神爱上了他于是，他就蹲下去吻她，她的嘴唇也向他靠拢但是，当他的嘴唇一接触清亮的溪水，水中那张可爱的脸就消失了这位恼怒的小伙子人此时变得绝望了，他从未被人云云鄙视过改日夜呆在溪边，不吃不喝，不久就死了他从未思疑过水中的女孩只是自己的影子而已众神非常怜悯他那优美的躯体，把他变成了一朵重名的花

Among the one-level clustering algorithms for data stream, the one of most famous algorithms is STREAM which was designed by Sudipto Guha et al, the members of Stream Group in Stanford University.

但是聚类是一个应用性很强的问题，我们应该将我们的视角转向实用角度。

Considering the characteristic and discipline of approximate computing over data stream model, we put forward a kind of Harr wavelet method on data stream sketch. This method improves the aggregate query effect on data stream model.

针对数据流计算模型的近似查询计算的特点和规律，研究与分析了数据流计算模型的基本特征，提出了一种基于数据流提纲的近似小波方法。

According to real-time requirement of stream data and losable characteristic of transportation, the thesis analysis existing stream data signature methods suc h as star-s haped tree-shaped and Golle chain. Considering the condition of limit ed resource of receiver, it proposes forward plac ed hash chain data signature sc h eme based on Gilbert-Elliot Network channel model and enhanc ed Golle chain stream data signature method.

本文针对流式数据实时性要求和传输中易丢包的特点，分析比较了现存的星型、树型、Golle链型等几种典型的流式数据签名方法，考虑到接收方资源有限的情况，基于Gilbert-Elliot网络通道模型，改进了Golle链型流式数据签名方法，提出了一种hash值前置流式数据签名方案。

Now she was hungry and angry.She began to smoulder.

现在她又饿又气，她开始流露难以抑制的怒火。

You have placed our iniquities before You, Our secret sins in the light of Your presence.

诗90：8 你将我们的罪孽摆在你面前、将我们的隐恶摆在你面光之中。