查询词典 digital control

Based on Harn抯 digital signature scheme and zero-knowledge proof, an authentication access control scheme for information protection system is presented in this paper.

基于Harn数字签名方案和零知识证明，针对信息保护系统构造了一种认证存取控制方案。

For such complex and composite systems as analogue and digital systems, electronic and mechanical systems, the Ptolemy II attain purposes with heterogeneously hierarchical ideology, in other words, actors and model of computation at the same level stand for a behavior of the system, and these components at this level can be converted into a composite actor that stands for another behavior of the system under the control of different models of computation at upper level with other actors. In this way, the system may be structured hierarchically.

对于复杂的混合系统，如模拟与数字系统，电子与机械系统，Ptolemy II采用层次异构的思想实现，即同层的角色和计算模型表示系统的一种行为，而这一层组件又可转变为一个复合角色，在上一层与其它角色在不同的计算模型控制下表示系统的另一种行为，从而实现系统的层次构架。

Digital hydrogeological map ; spatial data bank ; quality control

数字水文地质图；空间数据库；质量控制

Web service ; information security ; control of access ; digital signature ; inbreak detection

web服务；信息保密；访问控制；数字签名；入侵检测

The methods of theory analyses and digital simulation have been used in this thesis and several schemes of strapdown guidance law based on analyzing the performance of several classical guidance laws have also been present according to the characteristics of strapdown Anti-Radiation homing seeker. The stapdown guidance systems were built for a certain Anti-Radiation missile, adopting acceleration autopilot and the attitude autopilot, and the paper has focus on analyzing the performance of low frequency strapdown Anti-Radiation homing seeker. The Approaches of lead correction and dead-zone relay control were given to improve the guidance precision, and also the increasable observability law was attempt and validate.

本文采用理论分析和仿真实验相结合的方法，在对经典制导律进行理论分析和验证的基础上，针对捷联反辐射导引头的特点，提出了捷联制导律多种设计方案，并以某型反辐射导弹为应用背景，分别采用姿态角反馈自动驾驶仪和过载反馈自动驾驶仪构造了捷联制导系统，重点基于反辐射导引头的低频端特性，开展了捷联制导律的导引性能对比分析工作，提出了应用超前校正和带死区继电控制提高制导精度的方法，并对提高可观测性的捷联制导算法的实现思路进行了尝试和验证。

The digital frequency source this paper researched uses high integrated DDS chip AD9851 as frequency sources and signal mirac processors AT89C51 as system control center, it can output 10Hz-20MHz signal with high-precision and high stability frequency. The evenness of signal within the range of 10MHz is low to 0.1dB degree, and the smallest step is low to 10Hz frequency.

本课题研究的数字频率源采用高集成度DDS芯片AD9851作为频率源；以单片机AT89C51作为系统的控制中心，实现了10Hz～20MHz的高精度、高稳定度的频率输出。10MHz内信号幅度的平坦度为0.1dB、频率最小步进为10Hz。

The digital frequency source this paper researched uses high integrated DDS chip AD9851 as frequency sources and signal mirac processors AT89C51 as system control center, it can output 10Hz-20MHz signal with high-precision and high stability frequency.

毕业论文字数：15850 页数：36）摘要：随着现代电子技术的发展，高精度数字频率源在通讯、雷达、宇航、电视广播、遥控遥测、电子测量等领域得到了广泛的应用。

The SCCB(the OmniVision Serial Camera Control Bus)is simulated through the HPI(Host-Port Interface) of DSP,in order to initialize the OV7620;DSP controls the digital image data to be stored in the specifically location directly after the initialization results from the multi-power supply of the system.

通过DSP的HPI编程实现SCCB总线协议，完成对OV7620的初始化；系统通过多电压供电使OV7620初始化后在DSP的控制下实时的将目标数字图像数据直接保存到系统指定的数据存储位置。

The digital signal processor TMS320F2812-based control system of shunt active p ower filter is designed.

1引言解决电力系统谐波污染的有效途径之一是使用有源电力滤波器。

Based on the dyanamic analysis of position loop system for the use of four roll hydraulic mill, analyses of thickness precontrol and monitored control function and constitutent are given; and the design procedure of a digital controller and specific plan of microcomputer implementetion are also given.

在四辊液压轧机位置闭环系统动态分析的基础上，分析厚度预控和监控的功能、组成数字控制器的设计方法，以及微机实现的具体方案。将其应用到Φ(2 1 0～ 5 0 0 )mm× 80 0mm四辊液压轧机上，使轧机具有较强的消差能力，并使出口带材能锁定在要求的目标尺寸上

This brought fixed cost, but it also is meant at the same time use a source to won't make you singlehanded assume a problem.

这带来了一定的成本，但它同时也意味着使用开源不会让你独力承担问题。

He gained a small fortune in real estate.

他在房地产上发了一笔小财。