查询词典 digital computer

With the explosive development of communication and digital signal processing technology, an analog-to-digital converter, as an interface between analog signal and digital signal is necessary.

随着通信技术和数字信号处理技术的快速发展，作为模拟信号与数字信号界面的模数转换器得到了越来越广泛的应用。

Digital signal processor with high speed arithmetic and logic operation is the base for its digital realization. In this paper, it introduces the principle of direct torque control and the character of TMS320LF2407 digital signal processor. At the same time, it gives the software and hardware design of direct torque control system for asynchronous-motor based on the TMS320LF2407 DSP.

本文介绍了直接转矩控制的基本原理及TMS320LF2407 DSP的特点，给出了以TMS320LF2407 DSP为核心的异步电动机直接转矩控制系统的设计方案及软硬件的实现，同时对直接转矩控制系统进行了实验和仿真，验证了直接转矩控制技术的优良性能。

The method includes steps: digital watermark technique is adopted to hide information of key data in not key data codes of compressed image; under protection of digital watermark, using protective backup for key data detects whether normal transmitted key data is correct or not so as to detect error code; carrying out cyclic mutual backup by using macro blocks in same positions in front and back macro block set; embedding coded motion vector in form of digital watermark to DCT transformation coefficient, and ensuring that video data are not influenced as best as one can; when error code occurs, if key data backup is correct, then the backup replaces former key data; otherwise, using mean value of key data in adjacent macro blocks within same frame to replace former key data approximately.

本发明中，采用数字水印技术在压缩图像的非关键数据编码中隐藏关键数据信息；通过数字水印保护下的关键数据保护备份来检测正常传输的关键数据是否正确，由此来检测传输误码；用前后宏块组中相同位置的宏块进行循环相互备份；对运动向量进行编码，然后以数字水印的形式嵌入到相对不重要的DCT变换系数中，同时保证视频数据尽量不受影响；在误码发生时，如果关键数据备份正确，则直接替代原关键数据，否则用同一帧内相邻宏块的关键数据的平均值近似替代原关键数据。

Digital audio - Digital input-output interfacing - Transmission of digital audio over asynchronous transfer mode networks

数字音频。数字输入输出接口。异步传输模式网络上的数字音频传输

Digital Terrain Model is digital expression of geologic surface attributively information, it is also digital description with spatial location and terrain properties features.

数字地形模型是地形表面形态属性信息的数字表达，是带有空间位置特征和地形属性特征的数字描述。

We proposed the simplest structure of 2-D bilinear transformation digital circuit, we proposed four approaches of the realizations:(1) Realization of 2-D discrete domain difference equations;(2) 2-D FFT realization;(3) Digital hardware implementation;(4) by 2-D recursive digital structure to realize them.

在第七章，我们则重点研究了二维数字滤波器的实现问题。我们对第六章提出的2-D双线性变换电路又作了进一步的简化，获得了一种最简结构的二维双线性变换数字电路，该电路仅有二个延时器和一个乘法器。在第七章里，我们提出了二维跳耦型数字滤波器的四种实现方法：(1)二维时域差分方程实现；(2)二维FFT实现；(3)数字硬件实现，(4)用2-D递归数字结构实现。

ARM embedded system and DSP are widely used in everywhere nowadays, for example: PDA, digital top box, digital camera, and digital TV.

ARM嵌入式系统和数字信号处理器已无处不在，手机、掌上电脑、数字机顶盒、数码相机、数字电视等产品应用前景越来越广泛。

On the basis of investigating current situation of construction of academic digital libraries in China,this article makes classification statistic and analysis about the quality and quantity of digital resources construction,the development of digital resources integration,of thirtysix academic libraries and compare them.

当今数字图书馆建设已成为衡量一个国家信息基础和信息产业水平的重要标志。自上世纪末以来，各国竞相投资数字图书馆建设，并在世界范围内掀起了数字图书馆建设高潮。近年，我国各领域，特别是高校图书馆正紧跟世界发展的潮流，也掀起了一个数字图书馆建设的热浪，并取得了可喜的成果。

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。

Through the discourse on elements of printing quality controlment, and the printing controlling digital and methods, the thesis is going to give an elaboration and analysis on the printing quality controlment, in five aspects as the data transmission in digital flowsheet, color management in open sysem, data transmission and management, digital preliminary and on-line printing quality testing.

通过论述印刷质量控制影响因素和质量控制的数字化及其方法后，从数字化流程中数据流的传递、开放式体系下的色彩管理、数据传输与管理、数码打样、在线印刷质量检测五个方面进行印刷质量控制的阐述和分析。

Who? I never heard of him, Paul said, before asking teammate James Posey if he had heard of him.

赛后，科比说，他一直都是一名非常出色的射手，今天他打得很棒。

When I joined the company, I rotated around the different sections.

我加入这个公司时，轮换过几个不同的部门。