数字数据

Digital Application Ability Training Manual can help learners to learn to improve access to data, digital operations, the results show the number of applications and application capabilities!

数字应用能力训练手册》可帮助学习者学习提高获取数据、数字运算、结果展示和应用等的数字应用能力！

The book is divided into 14 chapters, including Introduction, continuous control system theory, process and discrete sampling, Z transform, sampled-data systems, discrete approximation of continuous system the equivalent, based on mathematical transform the classical design method, based on state space pole placement design methodology, multi-variable system of quadratic optimal control, quantitative effects, the choice of sampling period, the digital control system modeling, digital control system for a variety of design methods, variables quadratic optimal control systems, sampling cycle of selection, non-linear control of the problem, as well as digital control system, a typical application - Disk drive servo control design.

全书共分14章，内容包括概论、连续控制系统理论、采样过程和离散化、Z变换、采样数据系统、连续系统的近似离散等效、基于数学变换的经典设计方法、基于状态空间的极点配置设计方法、多变量系统的二次型最优控制、量化效应、采样周期的选择、数字控制系统的建模问题、数字控制系统的各种设计方法、变量系统的二次型最优控制、采样周期的选择、非线性控制的有关问题，以及数字控制系统的一个典型应用——磁盘驱动器的伺服控制设计等。

Earthworks zero line is determined by constructing the spatial gridding curved surface model of the original terrain and the field leveling design terrain by digital elevation mode. The DEM data of original terrain are obtained by actual measurement. The mathematical correlation is deducted to demonstrate the relationship between the coordinates of any point on spatial line and the direction cosine by the spatial linear equation. DEM data obtaining program is compiled by Fortran9.0 and it is applied automatically to obtain the DEM data of field leveling design terrain.

目的 利用数字高程模型(digital elevation model， DEM)构造原始地形和场平设计地形的空间网格曲面模型，确定土方工程中的零线方法通过实测提取原始地形DEM数据；依据空间直线方程，推导空间线段土任意点的坐标与方向余弦的数学关系式，采用Fortran90程序设计语言编写DEM数据提取程序，自动提取场平设计地形DEM数据；应用Surfers8.0和MapInfo软件构造规则的网格空间曲面模型并导出网格节，点数据；擦除场平设计范围外数据。

Easy article net the 2nd period digital publication project serves as grasper with feature of digital technology development and trend, it is project feature with relatively complete knowledge system, with knowledge link and data mining are the core of research and development of the project, offer more the number of suit individuation demand publishs a service.

易文网第二期数字出版工程以数字技术发展特征和趋势作为抓手，以相对完备的知识体系为项目特征，以知识链接和数据挖掘为项目的研发核心，提供更切合个性化需求的数字出版服务。

This invention relates to a DC linear motor digital controller including a central processor circuit, a data memory, a program memory, an A/D conversion circuit, a D/A conversion circuit, a linear shift orthogonal code pulse signal circuit, a signal isolation circuit, among which, the center processor circuit is composed of a special DSP chip controlled by the motor, a complicated programmable logic device CPLD combining with a peripheral expanding circuit, said digital controller fully utilizes the motor to control the special DSP chip to integral DSP kernel CZXLP and the rich external circuit in a single chip to make up of a digital controller for controlling high frequency response DC linear motor with small volume, low dissipation and high reliability.

高频响直流直线电机数字控制器，属于电机自动控制技术领域，目的在于获得快速、高精度往返运动的控制效果，实现高频响直流直线电机的精密位置跟踪控制功能。本发明包括中央处理器电路，数据存储器，程序存储器，A/D转换电路，D/A转换电路，直线位移正交编码脉冲信号电路，信号隔离电路；中央处理器电路由一个电机控制专用DSP芯片，复杂可编程逻辑器件CPLD，结合外围扩展电路组成。该数字控制器充分利用电机控制专用DSP芯片将高性能DSP核C2xLP和丰富的功能外设电路集成在单个芯片上这一特点，构成了一个体积小、功耗低、可靠性高和功能比较齐全的高频响直流直线电机控制用的数字控制器，使系统的整体成本大大降低。

This paper focuses on:(1) the mapping of different metadata sets, finding the relation of two metadata if their different owner_sets are described with RDF Schema;(2) the mapping of one metadata query statement onto several other metadata query statements in order to make several data providers work synchronously;(3) introducing the principle of Web services architecture, discussing why it is the best mode to integrate different systems.

本文重点研究了不同元数据标准中数据项的映射问题，提出了从两个独立的元数据集RDF Schema描述文档之间找到数据项语义对应关系的方法；通过把一个元数据检索请求映射成多种元数据标准的格式来实现对多个数字图书馆的统一检索；还介绍了Web服务架构的原理，探讨其在集成异构系统方面的优势。

The English-language digital "" is digital, is the adjectivers'functioning di man|Ilha, gitr and " simulation " continuous morbidezza instead, specify the period the data region after cutting out with numbers, or symbols to be represented by the amount of that number.

"数字"的英不白是digital，是di gitr的刻画词，它与"模仿"的不断之意互异，指不退期不天不兵数据区割后抽不入，用数字或标记赐与表现的度，称数字度。

A digital phase synthesizer is composed of a continuous phase data signal source, an interpolater to generate continuous edge configuration data signals in response with each continuous phase data signal, and a phase modulator to generate ouput clock signal.

一种数字相位合成器包括一个连续相位数据信号源。一个内插器响应每个连续相位数据信号产生连续边沿配置数据信号。一个相位调制器产生具有放置在由连续边沿放置数据信号确定的时间的边沿的输出时钟信号。

Digital signatures provide solutions for problems in the Internet such as identity authentication, data integrity and nonrepudiation. So digital signature technique has been studied widely, and various digital signature schemes suit for special cases have been proposed.

数字签名为网络环境下的身份认证题目、数据完全性题目、不可否认性等题目提供了可行的解决计划，因此数字签名得到普遍研讨，多种适用于特殊情形的数字签名被提出，群签名就是其中很主要的一种。

This thesis aimed at this hotspot, also one of the important regions during the Ninth-and Tenth-Five-Year-Program periods of Chinese Antarctic research. It made use of Radio Echo-Sounding data, surface horizontal ice flow velocity data, digital elevation model data, surface mass accumulation data and the data concerning melting at the bottom of Amery Ice Shelf , to study the grounding line, mass balance, and ice kinematic characteristics of grounded ice sheet and floating ice shelf respectively.

本论文瞄准国际上的这一研究热点地区，同时也是我国&九五&及&十五&期间的南极研究重点地区，利用无线电回波测厚数据、冰面流速数据、数字高程模型数据、冰面物质积累数据及冰架底部融化数据等，对该地区的接地线、物质平衡、陆地冰盖和漂浮冰架的冰川运动学特征等进行了研究。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。