After deducing the mathematical model of electropneumtic proportional / servo trace controlled system by theoretical analsis . the second chapter discusses some parameters affection to system performance . and then this chapter researches on the system ' s dynamic character . finally sets up the math model through estimating method . because of the essential nonlinear characteristic of electropneumtic proportional / servo control system . the chapter three sets up the system ' s identification model with system identification method , puts forward the identification idea and scheme , gets the identification results . and at the same time proves some foregone conclusions 第三章，由于电-气比例伺服位置控制系统的本质为非线性，本章首先用系统辨识方法建立了被控对象数学模型，提出了辨识思想和辨识策略，得到了辨识结果，由仿真和实验证明了用机理分析法建立的数学模型的正确性；同时证明了系统中位时动态品质最差。
In order to go deep into the thought of com and use the component technology better , this thesis firstly introduces the development course of the component software technology , then analyzes the present prevailing component technology of microsoft com , mainly introduces the com object and it ' s identification , the com interface , the register table and the com object , the class factory , the com library , the creation procedure of com object 为了能深入地理解com组件模型的思想，更好地应用com组件技术，本文首先介绍了组件软件技术的发展历程，接着分析了当前流行的微软组件对象模型com ，主要介绍了com对象及其标识、 com接口、注册表与com对象、类工厂、 com库、 com对象的创建过程等com技术。
The security of the system is analyzed from the view of security of network transmission and cryptography . the result shows that the security platform can rapidly and stably guarantee not only the file data ’ s sender identity , confidentiality and integrity , but also speech data ’ s identification and temper verification 最后,对系统的性能进行了全面的测试,测试了采用不同加密算法时的传输速率,并对系统的安全性作从网络传输的安全性和密码算法的安全性的角度做了全面分析。
This system ' s architecture is based on the advanced pki techniques and encryptions techniques , configured with indispensable hardware for security technology to form a substantial application security platform . this integrated application security platform provides the muti - platform applications systematical uniform security services , mainly including user ' s identification , confidentiality and integrity for data transmission , access control , user ' s digital sign and verification , cryptographic key management etc , to fulfill the trans - computer - type and trans - operation system control & management system , which is independent of different business applications or business procedures 本设计方案以信息系统安全理论与系统工程学原理为基础，在网络环境下构建了应用安全平台，实现了一个跨硬件机型与操作系统台的、与具体应用部署方式无关的统一的安全策略配置，实现了包括身份认证、访问控制、数据机密性和完整性控制、应用密钥管理服务、抗抵赖、安全审计、数据安全等安全服务。
