组成部分

The research topic of this thesis is a part of the key projectStudy on the long-term dielectric strength of large generator groun...

本文的研究内容是国家自然科学基金重点项目"大电机主绝缘长期绝缘强度和剩余寿命的研究"中的重要组成部分。

The research topic of this thesis is a part of the key project"Study on the long-term dielectric strength of large generator ground wall insulation and evaluation of residual life", which is supported by National Natural Science Foundation of China.

本文的研究内容是国家自然科学基金重点项目"大电机主绝缘长期绝缘强度和剩余寿命的研究"中的重要组成部分。

The research topic of this paper is a part of the research project"Study on the long-term dielectric strength of large generator groundwall insulation and evaluation of remaining life", which is supported by National Natural Science Foundation of P.

本文研究的内容是国家自然科学基金重点项目"大电机主绝缘长期绝缘强度和剩余寿命的研究"的重要组成部分。

The governor is the important component of the diesel engine.

调速器是柴油机的重要组成部分。

The dietetic culture is an essential part of the traditional Chinese culture.

饮食文化是中国传统文化的重要组成部分。

Muslims' dietetic culture is one of the indispensable component parts of Chinese dietetic culture.

清真饮食文化是中国饮食文化中一个不可或缺的重要组成部分。

In animal husbandry economy development of the long-term process, milk and milk food not only become an important part of Mongolian food, also become traditional custom, an important item in the etiquette, and in the daily life of the nomads plays dietotherapy role.

在畜牧经济的长期发展过程中，鲜奶及奶食品不仅成为蒙古族饮食的重要组成部分，也成为传统习俗、礼仪中不可或缺的重要物品，并且在牧民的日常生活中发挥着食疗作用。

Knowledge must be diffused to all receiver before it could be used.

因此企业创新活动是社会知识生产和使用过程的重要组成部分。

The development and utilization of digitized information resources play crucial role in providing support for petrochemical technological innovation. In the web circumstances, more and more digitized petrochemical information resources become an important content that of the special library. It has very large difference to with traditional information resources in number, structure, distribution, diffuseness and the form of media under network. So, how to organize and manage digitized information resources for meeting the users' need and improving the ability of utilizing digitized petrochemical information resources has been more and more important to special library.

在网络环境中，越来越多的数字化石油化工信息资源成为图书馆信息资源的重要组成部分，其在数量、结构、分布与传播范围、媒体形态、控制机制、传递手段等方面都与传统的信息资源有着极大的差异，因此组织和管理好数字化信息资源，使信息环境高度有序化，让用户可以在网上快捷方便地获取自己所需的信息，提高数字化石油化工信息资源的利用率，是石油化工专业图书馆界的当务之急。

In this paper, the concept of network security and security structures of OSI and Internet is introduced, and various threats confronting the computer network are also discussed. Several kinds of network information security technologies, including firewall technology, virtual private network, intrusion detection system, data encryption technology, identity authentication and security protocol etc. are also examined. The security of internal network is the biggest problem in the construction of each network. The solution to this problem lies in setting up a firewall. The theory of a firewall and the approach to its actualization is studied. Intrusion detection system, an important part of the computer network security system, has gained extensive attention. IDS monitors the computer and network traffic for intrusion and suspicious activities. It not only detects the intrusion from the extranet hacker, but also the intranet users. The emergence of virtual private network paves the way for realizing secure connection of LAN quickly and at a relatively low cost. The concept, function, key techniques, including the tunnel technology, and the ways to realize VPN are expounded in this paper. Also introduced is the data encrypt network technology, which is called the soul of computer network security, such as digital digest, digital signature, digital certificate, digital encrypt arithmetic and so on. At the same time, the principle and the process of implementing network security by digital certificate and digital signature, the basic principle and characters of security protocols, and finally, three of the security protocols, concerning the security problems in network, IPsec, SLL and SET are analyzed in detail Computer network system should be a system of dynamic defence, both dynamic and static, passive as well as active, and even offensive, combined with management and technology.

本文系统地介绍了网络安全的概念、OSI及Internet的安全体系结构，并讨论了计算机网络面临的各种安全威胁；内部网络的安全问题是每个建网单位面临的最大问题，可以认为防火墙技术是解决网络安全的一个主要手段，本文研究了防火墙的原理及其实现手段；作为一种主动的防御措施，入侵检测系统作为网络系统安全的重要组成部分，得到了广泛的重视，TDS对计算机和网络资源上的恶意使用行为进行识别和响应，不仅检测来自外部的入侵行为，也监督内部用户的未授权活动；虚拟专用网技术的出现，为实现网络间的连接提供了快速安全但又相对便宜的手段，本文较深入的探讨了实现VPN的隧道技术，并对VPN的概念、功能、实现途径、基本构成、关键技术及发展前景等问题进行了全面论述；数据加密技术是网络安全核心技术之一，本文从数据加密算法、数字摘要、数字签名及数字证书等几方面简要介绍了数据加密技术，并分析用数字证书和数字签名实现网络安全的原理和过程；对安全协议的基本原理、主要特点进行了较为深入的研究，并就网络的安全性问题剖析了三种安全协议：IPsec协议、SLL协议和SET协议。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。