查询词典 digital data

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。

As a special plan, it is highly summarized the basis for mapping the city's main achievements in recent years, pointing out the current development trend of the information age, and from the organization, financial, technical, security and other aspects of proposed safeguards, in order to Hebi City the completion of the socialist market economic system and practical basis for mapping the local management system and operational mechanism to achieve 1:5000 digital topographic map of the city's coverage, 1:2000,1:1000 and 1:500 scale digital topographic map series covering the key areas and the current trend of dynamic, fast updates, and built municipal basic geographic information and data systems and their transmission network system, and build e-government improve the Hebi City-based natural resources and spatial geographic information database, to build "digital Hebi" geo-spatial information infrastructure framework, and can basically meet the economic and social development of basic surveying and mapping needs of protection and support.

作为专项规划，它高度总结了该市基础测绘工作近年来所取得的主要成就，指明了当今信息化时代的发展趋势，并从组织、财力、技术、安全等方面提出了保障措施，为鹤壁市建成适应社会主义市场经济体制和本地实际的基础测绘管理体制和运行机制，实现1：5000数字化地形图的全市覆盖，1：2000、1：1000及1：500数字化系列比例尺地形图的重点区域覆盖和现势性动态快速更新，建成市级基础地理信息数据体系及其传输网络体系，建成完善鹤壁市电子政务自然资源与空间地理基础信息库，构建"数字鹤壁"地理空间信息基础框架，以及基本满足国民经济和社会发展对基础测绘的需求提供了保障和支撑。

In this paper the key points discussed were that, under the condition of a sharp hypsography of desert areas of Ordos basin, we used some new geophysical methods in the investigation of surface structure to obtain high accurate surface structure data and provide reliable scientific foundation for data acquisition and process; we dealt with the optimum coupling of surface geophones and the digital realization technique in desert areas, dug into a method of high frequency compensation according to attenuations by absorption near surface, adopted data processing and correction technique, solved high frequency attenuation and geophone coupling, eliminated the influences of sharply transverse fluctuation of hypsography in desert area on the seismic data, enhanced the fidelity and SNR of seismic section, and finally picked up more geologic information on the seismic profile and improved the precision of the lateral prediction for the reservoir beds.

本文旨在研究鄂尔多斯盆地沙漠区地表变化比较大的情况下，在表层结构调查中通过应用一些地球物理新方法，以获取高精度的表层结构数据，为资料采集和数据处理提供更科学的依据；研究在沙漠区地表检波器最佳耦合的方式与数字实现技术，研究通过近地表的吸收衰减规律进行高频补偿的方法，采用数据处理校正技术，解决高频吸收及检波器耦合，消除沙漠区表层横向剧烈变化对地震资料的影响，提高地震剖面的保真度和信噪比，从而使更多的地质信息能够从地震剖面中反映出来，提高储层横向预测的精度。

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。

In the construction of Digital Mine, one of the important tasks is to create 3D models including natural entities and artificial entities based on mine layers data, laneway data, drilling data and image data.

并且能够在三维虚拟空间中进行用户和三维模型之间进行多种的人机交互式查询和修改等操作。

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。

To plate system is made up of digital workflow, direct seihan machine, digital proofing, Automatic bending version a hole punch consisting of an all-digital operations seihan process, with the introduction of this technology on the newspaper printing quality standardization and acts as a data control.

直接制版系统是由数字工作流程、直接制版机、数码打样、全自动弯版打孔机组成的全数字操作制版流程，这种工艺的推出对报纸印刷的质量标准化、数据化控制起到了推动作用。

To plate system is made up of digital workflow, direct seihan machine, digital proofing, Automatic bending version a hole punch consisting of an all-digital operations seihan process, with the introduction of this technology on newspaper business card printing and membership card making quality standardization and acts as a data control.

间接制版编制是由数字处事过程、间接制版机、数码打样、残被迫弯版打孔机构成的残数字操纵制版过程，这栽工艺的推出差报纸制卡和会员卡制作的质度标准冻、数据冻把持起到了鞭策功用。

Having studied the digital down-conversionprocess of IF signal before the base band process which follows A/D conversion in wireless communication,the paper puts forward a new idea of utilizing the FPGA to realize multi-channel digital signal DDC.Through analyzing the features and performances of CIC filters,HB filters and multiphase-filter,we combine them with decimators and decimate the A/D data,thus reducing the digital signal rate and the load of DSP when processing the base band signal.

软件无线电技术是在通用的开放式无线电智能平台上，通过安装不同的软件来完成各种通信功能，其结构的基本特征之一就是使A/D变换尽量靠近射频端，目前的方案是在中频对模拟信号进行数字化，对中频数字信号进行下变频处理，使数字信号量降低到高速DSP能够处理的程度[1]。

Therefore, the 3S technologies are fully applied in the area. On one hand, remote sensing mapping and digital elevation modeling are used to realize highprecision seismic data acquisition and quality control of field operation. GPS control points are emplaced through "firstorder control, survey grid placement stepbystep and overall adjustment", and surface fitting technique is used to build a digital model with regional height anomaly corrected. The GPS RTK and fullstationequipment traverse survey are used to realize the lofting survey of shooting and receiving points. The height fitting of shooting and receiving points of the GPS RTK survey is realized through correcting the digital model with regional height anomaly.

为此，全面地采用了3S技术，一方面从总体上运用卫星遥感影像成图技术和数字高程模型系统，实现室内对地震勘探的精确设计和对野外施工质量过程监控；用GPS卫星定位技术采取&首级控制、分期布网、首分网整体平差&方法布测物探GPS控制点，采用曲面拟合技术建立区域高程异常改正的数字模型；应用GPS RTK和全站仪导线测量等方法实现激发、接收点放样测量，利用区域高程异常改正数字模型对GPS RTK测量的激发、接收点进行高程拟合。

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。