查询词典 compression of data

Topics include: mathematical definition and properties of information; source coding theorem, lossless compression of data, optimal lossless coding; noisy communication channels, channel coding theorem, the source-channel separation theorem, multiple access channels, broadcast channels, Gaussian noise, and time-varying channels.

课程主题包括：针对「资讯」的明确数学定义及性质描述；信源编码理论、无失真资料压缩技术、最佳化无错误编码；杂讯干扰的通讯频道解析、频道编码理论、资讯来源-通道编码分离理论、多重存取频道解析，广播型态频道解析、高斯杂讯及多变量时间频道解析。

The algorithm is targeted at high repetition rate of data compression algorithm, a higher compression ratio.

这个算法是专门针对重复率比较高的数据的压缩算法，有较高的压缩比。

There are a lot of methods on the compression of ECG signal, but in the paper, an ECG distortionless data compression algorithm is proposed .

对于心电信号压缩的方法有很多，本文提出了一种心电数据的无损压缩算法，该算法简单有效，利于单片机实时实现。

When DTD is available, XSLC can analyze the data model and encode elements according to the relationship of father node and son node, compress data part according to its type, and support query operations app-lied on compressed files, as for only one time of scanning data is needed, all the processes can be implemented in XML data stream environment.

提出XSLC（XML stream layered-coding compression）算法，通过预先扫描DTD对数据模式进行分析，继而根据元素的父子关系进行子元素层面的编码；同时根据数据类型进行数据压缩，能够在压缩之后的文档上进行查询，因为仅需一遍压缩扫描所以可以应用于数据流环境。

In the sub-system, the differential single-frequency GPS receivers are used to measure the landslide displacement automatically (the measurement precision reaches 1cm in horizontality and 2cm in verticality), micro control unit is utilized to realize data collecting, data compression and data encapsulation of GPS information including carrier phase data.

该子系统用差分GPS单频接收机实现滑坡位移自动测量（水平精度1cm，垂直精度2cm），用单片机实现了对GPS接收机输出的载波相位观测等卫星信息数据的实时采集、压缩、存贮和IP数据包封装等。

In order to realize precise compression of scattered data and predigest the establishing process of geometry topology relation, scattered data is converted into scan line data, the point cloud is disposed by the method of direct slicing, the algorithm of intersection between line and surface based on a pair of the least distance relation points and the algorithm of track based on eight directions coding of the section contour data are carried out and the method feasibility is proved by the example.

为了实现数据的精确压缩，简化点与点之间拓扑结构的建立，把散乱数据转化为扫描线数据，对点云数据进行了直接分层处理，采用了基于最小距离关联点对的线面截交算法和截面轮廓数据的八方向编码追踪算法，并用实例验证了方法的可行性。

Text compression is a branch of data compression are lossless compression.

文本压缩是数据压缩的一个分支，属于无损压缩。

Orthogonal transformation technology has been in all areas of digital signal received many applications, especially in the field of data compression compression.

正交变换技术已在数字信号的各个领域中得到了多方面的应用，尤其在数据压缩压缩领域。

The study establishes the compression of models and algorithms for vector graphics data on different basis, including on the basis of vector graphic factors of B spline curves in predecessors research; on the basis of rectangle graphic factors in main axis mode; on the basis of the application of Hough transform to polygonal line, ellipse and circle, so the study improves the models and algorithms of compression for vector graphic data.The compression for vector graphic data mainly studies the data of storing graphic factors.

本文研究的内容是：根据对以往各种曲线矢量数据压缩模型与算法的研究，建立了基于B样条的曲线矢量图形要素的数据压缩模型和算法；在前人研究的基础上，建立基于主轴模式的矩形图形要素的数据压缩模型和算法；本文作者将Hough变换应用到折线、圆及椭圆图形要素的矢量数据压缩上，在此基础上改进了基于Hough变换的折线、圆及椭圆图形要素的数据压缩模型和算法。

To improve the efficiency of ray-space data compression, a data compression method based on rectilinear direction search was proposed.

为了提高光线空间数据的压缩效率，提出了一种基于直线方向搜索的数据压缩方法。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。