With the rapid development of network , using email has become a main method of people ’ s communication . however , as a result of network openness , the email that transmitted on it can come under various attacks 随着网络的迅速发展,如今通过电子邮件进行信息交流,已经成为人们联系沟通的重要手段,然而,由于网络的开放性,在internet网络上传输的电子邮件会受到各种各样的攻击。
The demodulation circuit interfaced with the local bus , demodulates the signals transmitted on the pstn and restores the acquired data . in order to work nomally , hardware needs cooperation with software . the driver for pci demodulator has been developed 本地总线上挂接解调电路，对传输来的信号进行解调，恢复采集的数据。硬件需有软件的配合才能正常的工作，因此为pci解调器设计了驱动程序。
Ensure a secure environment for the collection and transmission of personal data - organizations should apply a " harm test " to the personal data they collect and transmit on the internet so as to implement the appropriate level of security measures 确保一个安全的环境以收集及传输个人资料举例来说，机构应对在互联网上收集及传输的个人资料进行损害测试，以决定应实施甚么程度的保安措施。
When the digital streaming video is transmitted on internet , it will be affected by the network , such as bandwidth , so the paper also deals with streaming video watermarking and its exclusive requirement . at the last chapter , an object - based watermarking algorithm has been presented . the watermarking algorithm for mpeg - 4 compression is devoted to address the influence from the rate scalability , based on static texture object in mpeg - 4 and watermarking in wavelet domain 在此基础上针对视频与图像的异同点，分析比较了静态图像水印和视频水印特点的异同，并且结合在internet上传输视频时，网络自身的特性(比如带宽资源等)对视频流产生的影响，以及这些影响对视频流水印技术的特殊要求，结合基于对象的视频编码标准mpeg - 4的特性，提出了在视频对象中利用基于小波变换的水印方案。
5 . in the industrial control application , information transmitted on control layer network has become more and more complex , requiring that communication network should satisfy real tune request diversity of information . to satisfy this requirement , a mixed schedule algorithm on switch ethernet is put forward based on information classification . according to information types , the algorithm takes different schedule algorithm which include setting priority level , modified rm schedule algorithm on hard real time information , priority level upgrade schedule algorithm 针对这一问题，通过研究交换式以太网的实时调度问题和过程监控层信息的实时性要求，对信息进行了分类，提出了基于交换式以太网的混合调度算法，对不同类型的信息采取不同的调度算法，在优先级分配上，对各类信息设置不同的优先级;对硬实时信息，提出了改进的rm调度算法;对硬实时信息和软实时信息的协调，提出了优先级提升调度算法。
Network coding theory totally changes the way we understand how information is transmitted in a network by refuting the common belief that information to be transmitted on a network only needs to be stored and forwarded ( very much like in a mailroom ) . instead , professor yeung proved that by means of coding , the information transmission capacity of a network can be expanded 杨教授的理论从根本改变了我们对于网络通讯的认知，一般人误以为在网络传输的讯息只需被储存及传送（如邮件收发） ，而杨教授则证明了编码有可能提升网络的讯息传输容。
The training will adopt the method of combination of explanation and on - site experience . the students can experiment by themselves . we all know that the development orientation of the intelligent building is the integration of communication , network and automatic system on the speedy and stable cabling system , i . e . what is transmitting on the cabling system is the computer and voice information , and such building control digital signals as safety system and fire - fighting system and the visible video monitoring and image 我们知道，智能建筑的发展方向是楼宇内的通讯、网络及自动化系统融合到综合布线系统这一高速、稳定的载体之上，即综合布线系统上传输的将是计算机和语音信息，而且还将包括安全系统、消防系统等楼宇控制的数字信号,以及可视的视频监控和图像。
Sister huang persevered in following master s instructions and performed the healing exercises for some time , thus alleviating much of her pain and helping her meditation immensely . she especially emphasizes how honored we are to be able to receive the liberation method that has been transmitted on this planet for eons 黄师姊遵照师父传授的动作，再加上以上这几个复健的动作，有恒心地做了一阵子之后，已大大地减轻了让她困扰多时的病痛，打坐的情况也改善很多。
This is a very prominent issue that needs people ' s attention , because information and data transmitted on - line are the subjects of the legal protection of intellectual property rights . the well - developed digital technology , in particular the information highway has dramatically changed the means for reproduction of copyrighted works 对互联网传输中的复制权应当有新的认识，简单地将传统复制权中的“复制或许可他人复制”运用于互联网传输环境，显然对作品的使用者太过苛刻，也不利于对作品的利用和传播。
On the basis of it , i design and implement ipsec in the network protocol stack of linux kernel , which can verify the encryption , integrity and authenticity of data at the ip level . it solves the problem of identification deceit , malicious modification and interception when datum is transmitted on the network , and the security of network transmission is improved greatly 在此基础上，在linux内核ip协议栈中设计并实现了ipsec ，在ip层提供数据传输的机密性、完整性和真实性，解决ip数据报在网络中传输时的身份伪造、被人篡改以及被窃听的问题，使网络传输安全性得到很大提高。
