查询词典 digital versatile disc

After analyzing characteristics of urban spatial data, this paper partly implements the integration of spatial data of multi sources and organization and management of sea-large spatial data. Finally, the spatial data managing system makes a uniform management, maintenance and updating on such data as digital linear graphic, digital elevation map, digital orthoimage, digital raster data, reference points and metadata.

本文针对城市空间数据特征分析，部分实现了多源空间数据的集成和海量空间数据的组织与管理，实现了多库一体化分布式城市空间数据管理系统，将数字矢量线划数据、数字正射影像数据、数字高程模型数据、数字栅格数据、控制点数据以及元数据的进行统一的管理、维护和更新。

This dissertation introduces the whole scheme、the hardware electro circuit design and software design, the result of experiment on salinometer is preferred at the end of the dissertation. Salinometer is base on SOPC technology, and use digital technology to design circuit: the excitation source for balance bridge is generated by digital method, its shape、amplitude and frequency can be control by digital signal, the standard branch of bridge is composed of three digital-analog-conversion, and uses the method of successive approximation to regulate the balance of bridge.

盐度计以SOPC技术为基础，通过数字化方式设计测量电路：电桥的激励源由数字化方式产生，激励源的波形、幅值和频率等可由数字量控制；平衡电桥标准支路由3个数模转换器组合实现，测量时以逐次逼近的方式调整电桥的平衡度；检测电桥平衡度的高灵敏度数字检流计同样以数字化方式设计，它的增益由程序控制，将电桥的输出电压数字化，以软件判断电桥平衡度。

Digital factory overall operating mode, the resumption of the three digital business card printing and membership card making payroll process, the business card printing and membership card making business moved to traditional business card printing and membership card-making factory, and order small digital business card printing and membership card equipment, such as OKI C9800n as the production of digital business card printing and membership card equipment to add.

数码工厂整体经营的模式为，收回三家数码制卡和会员卡制作门店，把数码制卡和会员卡制作的业务搬到传统制卡和会员卡制作工厂中，并采购小型数码制卡和会员卡制作设备（如OKI C9800n）作为生产型数码制卡和会员卡制作设备的补充。

The development of digital technology influences on the music industry radically on the internet time. The Phonogram and Videogram Producers have to transfer into digital modality. New competition elements penetrate, such as Online-music Operator, the Service Provider, and the Terminal Facilities Producer, go into the industry . Even the Mobile Operator would like to lead the development of the music industry by the music digital operation. There are gambling and amalgamation among groups for the increasing future of digital music.

网络时代数字技术的发展对音乐产业产生了颠覆性的影响，传统唱片公司不得不进行数字化转型，产业链加入了新的竞争力量——网络音乐运营商、增值服务提供商、终端设备制造商，甚至移动运营商以其音乐数据业务欲主导音乐产业的发展，各种力量之间的博弈、融合均为了未来数字音乐极具潜力的发展前景。

In order to realize the compatible communications system between digital TETRA and analogy MPT1327. Communications protocol between digital radio and control center is defined. Emergency call software flow for TETRA and MPT module is designed, and also state information sending and receiving for TETRA and MPT module is designed in this communication system. By comparing several solutions, switch methods between analogy TETRA communications and digital TETRA communications are designed including manual-switch and soft-switch. In the article, coding module of receiving and sending equipments in TATT analogy TETRA communications is described, so that it can be compatible with NOKIA network equipments and it also can improve the availability rate of the trunk system. In order to realize the integration of digital TETRA communication and analogy MPT1327 communications, double- frequency antenna system is researched.

通过几种车载电台解决方案比较，设计了相应的模拟集群通信系统与数字集群通信系统的切换方法，其中包括人工切换和软切换，实现了模拟与数字集群兼容的一体化移动列车调度电台解决方案；为了实现数字集群通信系统与模拟集群通信系统以及NOKIA与TAIT模拟集群通信系统之间的相互兼容，设计了新的数字车载电台与控制中心之间的通信协议；系统设计了用于数字集群通信模块的紧急呼叫通讯流程，以及设计了用于模拟集群通信模块状态信息发送与接收流程，以满足列车无线调度的运营要求；论文还论述了对TAIT模拟集群收发设备编码模块的改造，使之能与NOKIA的集群设备相兼容，提高了集群设备的利用率，为在NOKIA模拟集群通讯模块停产后寻找了一种可替代的兼容解决方案；为了实现数字集群通信系统与模拟集群通信系统设备的综合，论文还探讨了本工作所需专用的双频段的天线系统。

Taking use of the redundant data and randomicity of the digital products, the digital watermarking technology embeds the unperceivable but recognizable secret information--watermark containing the copyright information into the digital products, which can protect the copyright and integrality of the digital products.

数字水印技术利用数字作品中普遍存在的冗余数据与随机性，向数字作品中加入不易察觉但可以判定区分的秘密信息－水印，从而保护数字作品版权或完整性。

Altera Corporation system to the Cyclone FPGA series of digital platform, microprocessor, bus, Digital Frequency Synthesizer, memory and I / O interface hardware concentrated in an FPGA, the use of direct digital frequency synthesis technology and digital modulation waveforms required to achieve the rise, Using FPGA ROM storage of the DDS waveform table, and make full use of on-chip resources, improve the system's accuracy, stability and robustness.

系统以 ALTERA公司的 Cyclone 系列 FPGA 为数字平台，将微处理器、总线、数字频率合成器、存储器和 I/O 接口等硬件设备集中在一片 FPGA 上，利用直接数字频率合成技术、数字调制技术实现所要求波形的产生，用 FPGA 中的 ROM 储存 DDS 所需的波形表，充分利用片上资源，提高了系统的精确度、稳定性和抗干扰性能。

Digital clock is a kind of modern calculagraph which is composed of digital integrated circuit and can show decimal digital. Compared with mechanical clock, it is exact and can be see frankly. It is very popular in some public places, such as station, airport.Keywords: Multisim2001; Circuit Simulation; Digital Circuit; Answer Bell

数字钟是用数字集成电路构成的、用数码显示的一种现代计时器，与机械表比，它走时准、显示直观、无机械传动装置等特点，广泛应用于车站、码头、机场等公共场所。

Based on the ideas of undeniable digital signature and confirmer digital signature,a new zero-knowledge proof scheme of possessing a DSA digital signature is proposed which can be used to prevent the arbitrary distribution of digital signature.

引言 DSS[1] 是美国政府数字签名标准的缩写。DSS主要采用DSA数字签名算法[1] 及安全哈希函数SHA 1[2 ] 。

After detailed expatiation about digital output characteristic, the paper puts forward a set of digital interface scheme. Followingly, the digital interface based on IEC61850 standard is developed.At the bottom of this paper, a calibration experiment is carried out toward the designed digital interface.

在对电子式互感器数字输出特性做了详细阐述之后，提出了一套符合IEC 标准的数字接口实现方案，并研制了基于IEC61850 标准的数字接口。

More direct, directer ; most direct, directest

径直的，笔直的

Do you know how to use a chain saw?

你知道如何使用链锯吗？