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By transmitting the data after coding through several different BS, The spatial diversity gain can be obtained at the same bandwidth efficiency, thus the communication quality of the user can be enhanced in cell boundary.

它通过把编码后的数据流分别由多个不同基站同时发出,在不降低频谱利用率的前提下获得空间分集增益,从而提高在小区边界的用户的通信质量。

For reducing boundary distortion area, the elevations of grid DEM are viewed as a discrete sequence under a generalized coordinate, so that the boundary problem of two-dimensional discrete wavelet transform is turned into the boundary problem of one-dimensional discrete wavelet transform, which not only greatly reduces the boundary distortion area, improves the precision of reconstructed DEM data near the boundary, but also decreases the number of zeros adding on the boundary for wavelet transform, and boosts the compression ratio. On the basis of analyzing the distribution characteristics of coefficients in low and high frequency bands, a mixed entropy coding plan is applied, and a high efficient quantizator called"self-adaptive hard threshold"is established, which is helpful for improving the precision of the reconstructed DEM data and for enhancing compression ratio.

为了减小小波变换山区格网DEM数据压缩中边界失真区域,将山区格网DEM高程值视为广义坐标下的离散随机序列,把二维离散小波变换中的边界问题转换为一维离散小波变换中的边界问题,不仅大大减少了小波变换边界失真区域,提高了重构DEM数据边界点的精度,而且减少了边界补零个数,提高了压缩比;通过对山区格网DEM数据小波变换低频区和高频区变换系数分布特点的分析,采取了霍夫曼—游程混合熵编码方案,设计了高效、低失真的"自适应硬阈值"量化器,即对低频区变换系数不进行量化,直接进行霍夫曼编码;对高频区变换系数则先用"自适应硬阈值"方法量化处理,再进行游程编码。

This paper focuses on the job of building a practical program of map geocoding based on analysis of satellite SAR image. Map geocoding is one of procedures in post-processing of satellite SAR image.

为了使地理编码的过程成为一个流程,一个可以产生数据产品的处理过程,本文在分析和研究星载SAR图象地理编码的基础上,把重点放在建立一个实用的地理编码程序的工作上。

The coding device for DVD system and other record systems includes audio and video coder to convert the input audio and video data into audio and video data stream; system coder to convert the audio and video data stream into audio and video data stream of, say, MPEG format; audio and video data stream buffer before the system coder to store audio and video data stream generated during one set period by the audio and video coder; and buffer downstream the system coder with relatively low capacity and capable of performing the record operation of pre-trigger.

提供了在DVD系统等记录系统中使用的编码设备。该编码设备包括分别把输入音频和视频数据转换成音频和视频数据流的音频和视频编码器、把音频和视频数据流转换成例如MPEG格式的音频/视频数据流的系统编码器。还包括系统编码器上游的音频和视频流缓冲器,它们分别存储音频和视频编码器在一段预选的时间内产生的音频和视频数据流,从而使系统编码器下游的缓冲器的容量较小并有效地进行预触发器记录操作。

The paper sees Horton code as a primary characteristic value and generalizing condition of the river network, and selects, simplifies and generalizes river based on scale of before and after generalization,, The main contents of paper include:(1)Reviews generalization concept, arithmetic operators, methods, influence factor and frame of map generalization and design, analyze core theory of feature —oriented map generalization, discuss the main context and applicable method of river feature generalization(2) Summarizes natural form and spatial configuration characteristic of the river network, and describe the river network using digraph Paper mostly researches tree —like river, identifies the direction of river based on the angle of the main and secondary reach, and identifies the main river based on most length and predominant continuation of the flow direction along the major channel , then receives the grade of river by recursion and structuralize river network, builds hiberarchy rank system of river based on Horton coding(3)Designs the model of river network based on Horton code, and organizes the data of node, branch and river.

本论文把Horton编码作为水系网的一个主要特征值并以此作为综合条件,并根据综合前后的比例尺对水系网进行选取、化简和概括。论文的主要工作包括:(1)总结地图综合的概念、算子分解、实现方法、主要影响因素和总体设计框架,分析面向地理特征的制图综合的核心理论支撑,在此基础上讨论水系专题要素综合的主要内容和综合适用的方法。(2)总结水系网的自然形态和空间结构特征,用图论对水系网进行描述。以树状水系作为主要研究对象,依据树状水系的主支流交汇关系确定水系流向,依据水系中主流的长度最长和主流保持原有的流向趋势确定主流,按此递归得到河流的不同级别,对基于河段组织的水系网结构化,自动建立水系的Horton编码。(3)设计基于Horton码的水系网模型,对结点、河段、河流和河系的数据进行有效的组织。

It is divided into three parts: In Part 1, based on mumerical simulations with the pseudo-spectral method, we introduced some new concepts such as the response speed of soliton interaction, the symbol correlation range, etc., and simplified the evolution problem of general soliton sequencies into the evolution problem of finite equivalent classes of words on a unoriented circle, and then gave out the count formula of the equivalent classes by Pó1ya theorem.

全文分三个部分:第一部分以利用拟谱方法所做的大量数值模拟为基础,分析光纤孤子通信系统中一般编码孤子序列的演化性质,提出孤子相互作用传递速度概念,通过考察通信系统的实际情况,引入码元关联长度K,把一般编码孤子序列的演化问题归结为无定向圆环上有限个不等价码字的演化问题,最后利用Pólya定理解决了不等价码字的计数问题。

In a factory near Detroit, workers at Insulspan translate CADs into codes that generate custom wall panels down to a fraction of an inch.

在离底特律不远的地方有一家工厂,Insulspan公司的工人把各种计算机辅助设计程序进行编码,编码后产出的定制墙板小到一英寸。

The Base64 Content-Transfer-Encoding is designed to represent arbitrary sequences of octets in a form that need not be humanly readable.

Base64是一种很常见的编码规范,其定义为:Base64内容传送编码被设计用来把任意序列的8位字节描述为一种不易被人直接识别的形式。

Data processing machine, for transferring coded information from one medium to another

数据处理机,用于把编码信息从一媒体传输到另一媒体

A content based adaptive mesh generation algorithm is proposed in this paper. At first, a watershed algorithm of mathematical morphology is used to segment image into many homogeneous regions so that watershed lines can better represent image structure, contours, and edges. Boundaries of these regions are approximated by polygons that can be represented with a few parameters. Each end point of polygonal sides serves as candidate node of mesh model.

文中提出的基于图像内容的自适应网格模型生成算法,首先利用数学形态学中的水线算法把编码图像分割成许多纹理一致的区域,所分割的区域反映了图像的结构、轮廓和边界;再对这些区域的边界进行多边形拟合,得到多边形各个边的端点作为网格模型的节点,以这些节点为基础就能生成一个 Delaunay 三角形网格。

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推荐网络例句

I can't say anything hurtful about anyone.

我不能说任何伤害人左右。

She was a short fat woman , garbed in a very tight , very gaudy red dress .

大冬天的,我们穿两件毛衣她却穿件短袖,不停地扇扇子,一个劲叫热。

Leaf blade orbicular or oblong to ovate-lanceolate, less than 3 × as long as wide, abaxially not pruinose.

叶片圆形或长圆形的到卵状披针形,少于3 *倍于宽,背面不具粉霜。