通信系统

The system is composed of trust model, structure and function design, certificate database design, and implements the core functions of a standard CA system including signing, issuing and revoking certificates. The security communication modular of the system is based on the SSL Protocol to enhance the security of system communications. Besides, the kernel functions of the system are packed into DLL library, including symmetrical encryption algorithms, digest algorithms, digital signature algorithms and certificate operations such as certificate request, certificate building, certificate format conversion etc.

本文的主要工作是：在研究PKI相关技术的基础上，设计了企业CA系统方案，包括信任模型、结构和功能设计、证书库的设计；实现CA系统中最为核心的数字证书管理，提供数字证书的签发、注销和发布等各项功能；实现了基于SSL协议安全通信模块，增强了系统通信的安全性；系统采用动态链接库技术封装了对称加密算法、数字摘要算法、签名算法以及证书处理(包括证书请求、证书生成、证书格式转换等功能)，以动态链接库的形式提供调用接口，成为应用的安全基础设施。

In the field of industry control , Many machine mailing address are used by the majority of supervisory system to complete the data acquisition and the management duty. In order to save the movement cost the host from the type structure is used generally by us. The RS-485 standard is designed by this paper to carry on the network system of the host from type many machine correspondence. It is possible to simplify the system structure greatly and reduce the cost of developing system .

摘 要：在工业控制领域，大部分监控系统均采用多机通信方式完成数据采集、管理任务，为节约运行成本普遍是采用主从式结构，本文设计采用RS－485标准进行主从式多机通信网络系统可大大简化系统结构，降低系统开发成本。

Meanwhile, the host computer accomplishes the management of complicated data and control of single-chip computer, and with the use of Microsoft Communications Control provided by VC++, the communication between single-chip computer and personal computer is accomplished. Fifthly, by using systematic algorithm of MATLAB editable intelligent fire alarm system M file, and the user surface of VC++ intelligent fire alarm system, and also with the mixed program of MATLAB and VC++, the combination of the intelligent fusion algorithm and the visible surface is realized and the final judgment results are shown on the user interface. Lastly, the experiments about the effectiveness and reliability of intelligent fire alarm system shows that the system can distinguish fire, glow fire and non-fire source and that reducing the proportion of misreport is realized.

通过VC++提供的串行通信控件MSComm，完成了上位机和下位机之间的串口通信；(5)利用MATLAB编辑智能火灾报警系统算法M文件，再通过VC++设计智能火灾报警系统的用户界面，最后利用MATLAB和VC++混合编程，实现了智能融合算法与可视化界面的结合，将最终判断结果显示在用户界面上；(6)对开发的智能火灾报警系统的有效性和可靠性实验结果表明，该系统可以准确区分明火、阴燃火和非火灾源，对不同类型的火灾都具有较高的灵敏度，达到了降低误报率的目的。

In research and development of the system, mainly concluding key technologies of software-hardware environment analysis, no adapter interlink, terminal simulation, communication, sharing resources, binary file transfer algorithm , concurrent process, database-dumping and sharing, and to accomplish the basic a software design of E-classroom by adopting distribution system concept in minicomputer side , to accomplish the main software design of E-classroom by Winsock in microcomputer side , to study teacher software integration , try to realize transparent communication in the highest limit and sharing resources in the fullest extent , at last, weak and counter measure of the system is given, and the overall objective of heterogeneous computer is given to try to provide resemble system development with theory guide.

该系统的研究与设计过程中主要涉及软硬件环境分析、异型机无网卡互连、终端仿真、异型机通信、资源共享、二进制文件传输算法、并发进程、数据库转储与共享等关键技术，利用DSM分布式系统的概念完成了小型机部分电子教室的基础性软件设计，利用Winsock完成了微型机部分电子教室的主要功能模块，利用并发进程的概念研究了教师机软件的集成问题，使异型机用户之间达到最大限度的透明通信及充分的资源共享，给出了异构电子教室的弱点及解决对策，提出了系统的总体目标，力争为类似系统的研制提供理论指导。

Along with vehement market competition, the technical request that relates to exploit banausic and advanced network resource management is put forward,How to increase the operational level of the telecommunication network everywhere, how to complete the communication guarantee responsibility given from the superior, how to keep the high level service quality, how to manage the equipments of the different manufactory in unification, moreover how to carry through the assistant decision-making that relates to feasibility and maneuverability of the preparative scheme of the emergency communication base on the network resource.

随着市场竞争的加剧，对开发实用、先进的网络资源管理技术提出了要求，如何提高各地电信网络的运营水平，完成上级赋予的通信保障职责，保持高水平的服务质量，统一管理不同制造商的设备，并在网络资源的基础上进行战备通信应急预案的可行性与可操作性的辅助决策；如何综合运用计算机科学、通信技术、地理信息系统的理论和方法对已投产运营的或将建设的网络相关信息进行有效管理，改善和提高调度、指挥效率，更加有效地管理和分配整个网络资源；如何使网络资源管理从单项的、人工的、独立的、局部的和数据的，走向综合的、智能的、统一的、整体的和可视化的，从而充分地发挥通信设备的作用，及时准确地为重要客户提供必要的通信保障；成为当前人们所关注并迫切希望得到解决的问题。

Chapter Three examines some spreading codes and their correlative processing, which is the foundation of spreading modulation and demodulation.Chapter Four, based on the CEBus standard protocol system, stresses the structure of intelligent home networking system, analyzing the working principle of the system, and discusses the realization of PLC module and communication between instruments and PC.

第四章重点阐述了基于CEBus的家庭测控网络系统构成，研究了CEBus标准协议体系与此系统的工作原理，同时深入探讨了电力线扩频载波通信模块的具体实现方法及家庭测控网络仪器与PC机通信的实现，总结了家庭网络应用电力线通信的不足之处。

KT101.1 Computer Keyboarding Lab 1.5 KT101.2 Computer Keyboarding Lab 1.5 A101.1 Accounting I Lab 1.5 A101.2 Accounting I Lab 1.5 E102.1 Business Communications 1.5 E102.2 Business Communications 1.5 C108.1 Spreadsheet Applications Lab 1.5 C108.2 Spreadsheet Applications Lab 1.5 C110.1 Computer Medical Applications Lab 1.5 C110.2 Computer Medical Applications Lab 1.5 ME101 Medical Terminology 3 ME102.1 Medical Office Procedures Lab 1.5 ME102.2 Medical Office Procedures Lab 1.5 ME104.1 Medical Insurance Records 1.5 ME104.2 Medical Insurance Records 1.5 ME106.1 Advanced Medical Coding 1.5 ME106.2 Advanced Medical Coding 1.5 MA110.1 Anatomy and Physiology/Musculoskeletal, Integumentary, Eye, Ear, and Endocrine Systems 1.5 MA110.2 Anatomy and Physiology/Musculoskeletal, Integumentary, Eye, Ear, and Endocrine Systems 1.5 MA111.1 Anatomy and Physiology/Digestive, Urinary, Reproductive, Nervous, and Cardiovascular Systems 1.5 MA111.2 Anatomy and Physiology/Digestive, Urinary, Reproductive, Nervous, and Cardiovascular Systems 1.5 MA112.1 Medical Office Administration 1.5 MA112.2 Medical Office Administration 1.5 Total Quarter Credit Hours - 36

KT101.1电脑键盘操作实验室1.5 KT101.2电脑键盘操作实验室1.5 A101.1会计本人实验室1.5 A101.2会计本人实验室1.5 E102.1企业通信1.5 E102.2企业通信1.5 C108.1电子表格应用实验室1.5 C108.2电子表格应用实验室1.5 C110.1计算机医学应用实验1。 5 C110.2计算机医学应用实验室1.5 ME101医疗术语3 ME102.1医疗办公室程序实验室1.5 ME102.2医疗办公室程序实验室1.5 ME104.1医疗保险记录1.5 ME104.2医疗保险记录1.5 ME106.1高级医疗编码1.5 ME106.2高级医疗编码1.5 MA110.1解剖生理学/骨骼，体被，眼，耳，和内分泌系统1.5 MA110。 2解剖生理学/骨骼，体被，眼，耳，和内分泌系统1.5 MA111.1解剖生理学/消化，泌尿，生殖，神经，心血管系统和1.5 MA111.2解剖生理学/消化，泌尿，生殖，神经，心血管系统和1.5 MA112.1医疗办公室行政1.5 MA112.2医疗办公室行政1。 5 总数的四分之一学时- 36

3Rd Combat Communications Group, Tinker AFB, Okla.- provides deployable computer communications, navigation, and air traffic systems, anywhere in the world and under hostile conditions.

第3战斗通信大队，廷克空军基地，俄克拉荷马州-提供部署计算机通信，导航和空中交通系统，在世界任何地方和敌对的条件下，提供部署计算机通信，导航和空中交通系统。

Letter Alvarion mainly engaged in microwave radio frequency wireless communications products and network optimization system covering the development, production, marketing and provision of appropriate services, mobile communications operator wireless network equipment supplier of professional services and systems integration Business.

奥维通信主要从事微波射频产品及无线通信网络优化覆盖系统的开发，生产，销售和提供适当的服务，移动通信运营商的无线网络，专业服务和系统集成商设备供应商。

And the technology of Java Applet and Web database is introduced in detail. The particular design of the reuse-water remote monitoring and control system is purposed. The concrete hardware structure and software unitary design suppose is put forward, and achieving the tight joint between monitoring and control technology and network technology, the serial programming is used to the data collection in the system.

论文详细设计了中水回用远程监控系统，提出了基于Web的中水回用远程监控系统的具体硬件结构方案和软件的整体设计思路，实现了监控技术与网络技术的紧密结合，应用串行通信技术进行数据采集，使用Java Applet和Socket通信技术解决远程实时通信问题。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。