通信系统

One, the integral sex action of system of integrated traffic information is told from technical level, system of integrated traffic information is wait to carry a system to undertake transforming to traditional traffic through using technology of IT, communication, control technology, the modern science and technology that uses these technical delegates undertakes control and administrative to traffic system.

一、综合交通信息系统的整体性作用从技术层面上来讲，综合交通信息系统是通过采用信息技术、通信技术、控制技术等对传统交通运输系统进行改造，并运用这些技术代表的现代科技对交通系统进行控制和治理。

When choosing the ground, suzhou alone villa lake tall deanery reachs peculiar scientific research dominant position because of its complete infrastructure, make the first selection that platform builds, system of high quality network, office, supervisory system, long-range education was had here system, receive data of system, campus safety of net, network and geographical information management, all employ solution of the network communication equipment with domestic advanced international, technology.

选地时，苏州独墅湖高教区因其完备的基础设施及特有的科研优势，成为平台建立的首选，这里具备了高品质网络、办公系统、监控系统、远程教育系统、接入系统、校园数据网、网络安全以及地理信息管理等，均采用国内国际先进的网络通信设备、技术解决方案。

With the continuous development of Internet technology , some considerable attentions have been directed to the integrated control system and network communication system.

在传统的控制系统中加入网络作为通信媒介，使系统的性能有了大的改观，但同时也不可避免的带来以下问题：网络延迟、丢包问题、单包和多包传输问题等，这些问题的存在，不仅会降低系统的控制性能，而且还能引起系统的不稳定。

At present, there are two branches in the research of database security technology, which are secure database management system and enhancive database security system. According to the view of enhancive database security system, this paper takes the typical TCSEC model as reference. An agent system is built between database client and database server for secure communication, SQL parsing and access controlling.

目前，我国数据库安全技术研究主要有安全数据库管理系统和数据库安全增强系统两个方向，本文主要从数据库安全增强系统的角度出发，参考经典的TCSEC监视器模型，在数据库客户端和服务器端之间建立一个代理系统，来完成数据库的安全通信、SQL分析和访问控制等功能。

This paper introduces the development process of wastewater disposal,it's auto control system,the level of nowadays and several new techniques of China and foreign countries. The immanent structure,control rules,main features and design methods of auto control systems in wastewater disposal process are studied in this paper. Aiming at four typical parameters,such as temperature,dissolved oxygen,PH and the planes of water,the Distributed Control System is designed,composed by PC called epigyny computer and SCM 8098 called hypogyny computer,and some sensors,shift deliver utensils and related meet orifices of parameters gathering and figures communication. The idea and work processes of some program modules are also introduced here. The programs in epigyny computer include the program of mutual interface between operator and computer,figure disposal program and chart output program,which are exploited with Visual Basic 6.0. And the programs in hypogyny computer are composed by figure gathering program,the progr am of supervision and control of system,communication program and meet orifice program between assemble language and VB,which are designed with assemble language.

本文介绍了国内外污水处理及其自动控制系统的发展过程、当今水平和提高自动化程度的若干新技术；研究了污水处理自动控制系统的内在结构、控制规律、主要特点和设计方法；选取污水处理中的典型参数温度、溶解氧、PH值和液位等为控制对象，设计了以个人计算机为上位机、以8098单片机为下位机，并辅之以传感器、变送器及相关接口单元所构成的二级集散控制系统；介绍了几个主要程序模块的设计思路、工作过程，这些程序模块是：用高级语言Visual Basic6.0开发的上位机人机交互界面程序、数据处理和图表输出程序，用执行效率高的汇编语言开发的下位机数据采集与系统监控程序、上位机与下位机之间的数据通信程序，汇编语言与VB之间的转接程序，等等。

This paper introduces the development process of wastewater disposal,its auto control system,the level of nowadays and several new techniques of China and foreign countries. The immanent structure,control rules,main features and design methods of auto control systems in wastewater disposal process are studied in this paper. Aiming at four typical parameters,such as temperature,dissolved oxygen,PH and the planes of water,the Distributed Control System is designed,composed by PC called epigyny computer and SCM 8098 called hypogyny computer,and some sensors,shift deliver utensils and related meet orifices of parameters gathering and figures communication. The idea and work processes of some program modules are also introduced here. The programs in epigyny computer include the program of mutual interface between operator and computer,figure disposal program and chart output program,which are exploited with Visual Basic 6.0. And the programs in hypogyny computer are composed by figure gathering program,the program of supervision and control of system,communication program and meet orifice program between assemble language and VB,which are designed with assemble language.

本文介绍了国内外污水处理及其自动控制系统的发展过程、当今水平和提高自动化程度的若干新技术；研究了污水处理自动控制系统的内在结构、控制规律、主要特点和设计方法；选取污水处理中的典型参数温度、溶解氧、PH值和液位等为控制对象，设计了以个人计算机为上位机、以8098单片机为下位机，并辅之以传感器、变送器及相关接口单元所构成的二级集散控制系统；介绍了几个主要程序模块的设计思路、工作过程，这些程序模块是：用高级语言Visual Basic6.0开发的上位机人机交互界面程序、数据处理和图表输出程序，用执行效率高的汇编语言开发的下位机数据采集与系统监控程序、上位机与下位机之间的数据通信程序，汇编语言与VB之间的转接程序，等等。

Said verification test will include the rise and fall and 4 times to go around the course one time, 777 aircraft and airport runway extension of the landing routes, instrument landing systems, aids to navigation lighting systems, communications systems, navigation and docking system, FM and testing, etc..

刘志仁透露，试飞验证将包括4次起落和1次复飞过程，777飞机将与机场跑道延长工程的起落航线、仪表着陆系统、助航灯光系统、通信导航系统等系统进行对接、调频和检验等。

Chapter three (the methods of generating chaotic signal and its applications): In this chapter firstly the mechanism that a simple kinetic system, subsection linear map system, can generate chaotic phenomena is affirmed, the characteristics of correlation function of the chaotic signal generated by this system are simulated, on this basis a simple applicable method for generating chaotic signal is given; secondly some typical circuits generating chaotic signal are designed, also use operational amplifier to design a third -order autonomous circuit with chaotic dynamics. The basic mechanism and typical structures of chaos in the application of communication are introduced systematically and a simple method is provided for generating pseudo random code signal; At last Chaotic signal is applied into the analysis of system characteristic.

第三章(混沌信号产生方法及其应用)首先针对一类简单动力学系统——分段线性映射系统能够产生混沌现象的机理及由该系统所产生的混沌信号的自协方差函数特点进行了证明和计算机仿真，提出了软件产生混沌信号的一种实用方法；其次分析讨论了几种能够产生混沌信号的典型混沌电路，提出了用运算放大器与阻容元件实现三阶自治混沌电路的基本原理；概述了混沌在通信领域中应用的基本原理和典型结构，提出了产生伪随机码信号的一种简单方法；最后将混沌信号用于系统的特性分析中。

At present, a cheap, efficient and feasible hot-line sales system is in critical need. Against to the problem of old system in security, real time and upgrading, some new technics , such as System Develop Model, GPRS, Terminal OS, System Security and Data Backup, are applies to build a strong and smart system.

鉴于彩票销售系统的现状，急需推出一套廉价、高效并且可行的全热线销售系统，针对原有准热线系统的安全性、实时性以及维护升级等存在的弊端，提出了改进及改造的方案，同时探讨了其中用到的几点关键技术：前端、通信、后台、系统安全性以及数据备份手段等，最终实现全热线彩票系统的实施及应用。

The thesis provides design and realization technology of power distr...

本文深入讨论了配网自动化系统的设计方案和实现技术，主要工作包括： 1、配网主站系统平台设计和SCADA系统设计 2、站端系统设计 3、通信方案设计 4、馈线自动化设计系统的实现提高了配电网络智能化水平，特别是加快了配网故障区域的隔离和负荷的转供速度，为电力企业带来了巨大的经济效益和社会效益。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。