查询词典 compression of data

Procedures for data compression can play a very good compression ratio, and a better quality of compression.

程序对数据压缩能起到很好压缩比，且有较好的压缩质量。

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 proposes an encoding compression method, which is similar to a dictionary index. To compress test data, the data blocks which are compatible with the reference data blocks are marked by "1" in the proposed method. Its decompression architecture requires only a finite state machine and a cyclical scan register whose length is the same as that of the data block.

提出一种类似于字典索引的编码压缩方法，将与参考数据块相容的测试数据块用"1"标记来压缩测试数据，解压体系结构只需要一个有限状态机和一个与数据块等长的循环扫描移位寄存器。

Dissertation introduced a brief analysis of time series, simple overview of the data compression technology in several common algorithms, wavelet algorithm and to focus on the wavelet analysis of the nature and characteristics of algorithm, introduced by wavelet data compression algorithm method.

论文主要介绍了关于时间序列的简要分析，简单概述了数据压缩技术的中的几种常用算法，并以小波算法为重点分析了小波算法的性质和特点，介绍了用小波算法进行数据压缩的方法。

Rle compression algorithm procedures, said a simple RLE compression is the same as a string of continuous data into a specific format to achieve the purpose of compression.

详细说明： rle压缩算法程序，简单的说RLE压缩就是将一串连续的相同数据转化为特定的格式达到压缩的目的。

In summary, the work in this dissertation has solved several hard problems (including low compression rate, bad compression quality, and moderate coding efficiency, etc. under the condition of low band-width) of image compression coding in the data link of flighting control of cruise missiles, and provides a foundation for transferring high quality images instantly in man-in-the-loop control of the cruise missile.

总之，本文的研究工作在一定程度上解决了面向巡航导弹飞行控制数据链的图像压缩编码技术中存在的低带宽条件下，压缩率低，压缩质量差，编码效率不高等难题，为实现巡航导弹人在回路控制中实时的、高质量的图像压缩编码奠定了技术基础。

According to the order, the data of Caragana Korshinskii Kom is about 6.07 J/cm~2, 23.67 MPa, and 1787.98 MPa separately, and the data of Vitex is about 11.78 J/cm~2, 48.06 MPa and 3544.36 MPa separately. Additionally, the data of Fourfold Acacia is about 10.09 J/cm~2, 40.78 MPa and 2304.87 MPa , whereas the data of Grewia biloba var.parviflora is about 8.47 J/cm~2, 65.88MPa and 2523.88MPa respectively. The impact toughness four shrubs is in the bound of the data of wood in China, but the compressive strength and compression elastic modulus parallel to grain are some small than those of ordinary wood.

柠条的冲击强度为6.07J/cm~2，顺纹抗压强度为23.67MPa，顺纹抗压弹性模量(来源：AB75C论文网www.abclunwen.com)为1787.98MPa；荆条的冲击强度为11.78J/cm~2，顺纹抗压强度为48.06 MPa，顺纹抗压弹性模量为3544.36MPa；四倍体刺槐冲击强度为10.09 J/cm~2，顺纹抗压强度为40.78 MPa，顺纹抗压弹性模量为2304.87 MPa；扁担木的冲击强度为8.47J/cm~2，顺纹抗压强度为65.88MPa，顺纹抗压弹性模量为2523.88 MPa。

In this dissertation, through studying montanic grid DEM data in view of informatics, it is discovered that montanic grid DEM data possesses features of high information efficiency and low redundancy, which makes it impossible to gain high compression ratio with lossless compression methods.

用信息论观点对山区格网DEM数据进行了研究，发现山区格网DEM数据具有信息效率高、冗余度低的特点，揭示了用无损压缩对其进行压缩时效率较低的原因。

Here I reported new structural data to answer above question, including field section observations and geologic map with large scale in a key area, accompanying with detail microstructural observations, quartz C-axial fabric analyses, and tectono-thermogeochronology (40Ar/39Ar and zircon SHRIMP U-Pb method). Taking available previous data into account, following progression is achieved:1. Completely rebuilding the post late-Paleozoic deformation history of the Harlik MountainFive stages of deformation were identified:(1)pre-Permian compression deformation which may have resulted from pre-Permian subduction;(2) earlier Permian post-collision extension;(3) middle Permian west-east directed dextral slip shearing;(4) later Permian nearly N-S compression deformation; and (5) later Cenozoic intra-plate N-S compressional deformation.

本文选择新疆东部哈尔里克山为研究对象，通过详细的野外路线地质构造调查和关键地区大比例尺地质填图，以及室内显微结构观察、石英岩组分析和构造热年代学(Ar-Ar和锆石SHRIMP U-Pb定年)研究，结合前人研究成果，取得了如下新进展：1、系统重建了哈尔里克山晚古生代以来的变形历史识别和确定了该区板块俯冲碰撞阶段的二叠纪以前挤压变形，后碰撞阶段早二叠世伸展变形、中二叠世近东西向右行走滑变形和晚二叠世近南北向挤压变形，以及板内演化阶段的晚新生代南北向挤压变形等5期构造变形事件。

First, we analyze the time complexity, space complexity and compression ratio of RFID data compression which uses traditional compression algorithm.

本文首先分析传统压缩算法在RFID数据上的应用，所需的时间复杂度，空间复杂度以及平均压缩效率；其次，分析改进型的压缩算法在RFID数据上的应用，所需的时间复杂度，空间复杂度以及平均压缩效率，通过对两种压缩算法的分析比较，体现改进压缩算法的有效性，并讨论小型企业和大型企业运用改进算法存储RFID数据的一些不同之处。

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。