前景

The sameness and differentness as well as advantage and disadvantage of these preparing methods of CeO2 interlayer film were elucidated synthetically.

综合分析了这些制备方法的异同和特点，指明了该领域的发展前景。

Ceramic materials have the advantages of good chemical stability,high-temperature resistance,size stability and light diffuse reflection .

陶瓷材料具有良好的化学稳定性、耐高温性、尺寸稳定性、光漫反射特性等优点，在大功率激光器上有较好的应用前景。

"In the larger coastal cities, growth is slowing, competition is intensifying and costs are increasing," says Lord Digby Jones, former trade and investment minister.

这项研究先对中国人口超过100万的全部274个城市进行了调查，并以其经济规模、增长速度和人口数量筛选出35个最有发展前景的城市。

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。

The general situation of research of the determination methods of digestibility, extraction and properties of sorghum kafirins were summarized.

该文介绍高粱醇溶蛋白的提取方法，特性和消化性测定方法，并简单分析高粱醇溶蛋白发展前景。

DSP in the development of digital video and thinking, application of DSP is a very broad market.

DSP在数字视频中发展与思考，DSP的应用有一个非常广阔的市场前景。

Digital tension technology of prestressed concrete is to use digitizer in tension construction. It is the particular application of modern information technology in civil engineering construction. The research on digital tension technology has important backgrounds of engineering and broad prospects of application.

预应力数字化张拉技术是采用数字化设备直接进行张拉施工的技术，是现代信息技术在土木工程施工中的具体应用，该技术的研究有着重要的工程背景与广阔的应用前景。

Recent investigations have shown that diglyceride can be extensively applied to food, pharmaceuticals, cosmetics and other chemical products due to its specific physiological actions and physico-chemical properties.

近年来的研究表明，双甘酯具有许多独特的生理作用和物化性质，可广泛地应用于食品、医药、化妆品及其他化工产品，是一类很有开发前景的新型化工原料。

Recent investigations have shown that diglyceride can beextensively applied to food, pharmaceuticals, cosmetics and otherchemical products due to its specific physiological actions andphysico-chemical properties.

近年来的研究表明，双甘酯具有许多独特的生理作用和物化性质，可广泛地应用于食品、医药、化妆品及其他化工产品，是一类很有开发前景的新型化工原料。

This paper introduced the use, market foreground, production status and existing questions of dimethyl ether.

本文介绍了二甲醚的用途，市场前景，生产情况及存在的问题。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。