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In this paper we firstly discuss the general concepts of compter security and cryptology, and then describe the mostly used modern encryption methods and technologies. We detail the advantages and disadvantages of symmetric algorithm, public-key algorithm and one-way hash function. At last we put forward a new block cipher - permutation code, and describe the secret hash digital signature and online electronic contracting with the trusted third party system.

本文首先讨论计算机安全和密码学的一般概念，然后介绍现代加密手段常用的方法和技术，详细讨论了对称加密方法、公开密钥加密方法和单向散列加密方法的优点和不足，进而提出了一种新型的分组加密算法—排列码加密算法，并在此基础上实现了保密散列数字签名算法和有可信第三方参与的网上电子签约。

During 1632—1638 he engaged in private study — writing the masque Comus (1637) and the extraordinary elegy Lycidas (1638)— and toured Italy.

实际上，他最近的邻居离他只有一英里，走路也就20分钟；铁路离他半英里；交通繁忙的大路距他300码。

I sat down several yards from our gate, as far away as I could get in the short concourse.

我坐在离登机口几码处，在狭小的候机厅里离他足够远的地方。

Assembly language, which are employed in every conditional instruction in the instruction set.

，然后讨论IA－32汇编语言中的的条件码（每一条条件指令都使用这些条件

Based on a lot of experiment results, a conclusion is drawn: comparing with other factors, the performance of branch handling strategy is the key limits of processor to exploit the instruction level parallelism existed in nonscientific code, cache miss have severe effect on superscalar processor's performance when it runs scientific code. Second, in order to reduce the branch penalty and improve the performance of superscalar processor, a new branch handling strategy—a classification based hierarchical branch handling strategy, CHBHS is proposed. It first expands the traditional processor architecture to support multiple condition code, conditional execution and Mbranch instruction, as a result, compiler can reduce the number of static conditional branch when the code is generated. Then, CHBHS tries to use the best suitable mechanism to deal with different branch base on their different behavior. CHBHS can predict the target address of unconditional branch, subroutine call and conditional branch by buffering their target address in branch target buffer, a newly proposed high efficient return address stack is used to reduce the penalty of subroutine return instruction, a new Counter Register Stack is also proposed to reduce the penalty of loop-closing branch to zero, and dynamic branch predictor is incorporate with branch target buffer to predict the outcome of conditional branch.

基于上述结论，为了尽量消除转移指令对处理器开发指令级并行性能力的影响，进一步提高处理器性能，在详尽分析目前已存在的转移处理策略的特点与局限性的基础上，首次提出了一种新的转移处理策略即基于分类的层次转移处理策略CHBHS(Classification Based Hierarchical Branch Handling Strategy)，它首先通过扩展传统的体系结构，支持多条件码、条件式执行及多分支转移技术，以使编译程序在进行代码生成时可尽量少生成条件转移指令，从而减少静态条件转移指令的数目；其次，基于不同的转移指令的行为不同这一事实，提出了对不同的转移指令采用不同的机制进行处理的思想，即对无条件转移指令和函数调用指令以及条件转移指令的目标地址，采用转移目标缓冲器来预测，对于函数返回指令，采用所提出一种的高效返回地址栈来预测其目标地址，对于大多数循环控制转移指令，采用所提出的Counter Register Stack来将其所可能带来的损失减少为0，对于其他的条件转移指令采用动态预测机制来预测其方向。

Then gray matching are done with the conjugate points,and the points which can not match well are found.

以此为基础选择精检测窗口，进行边缘提取和跟踪，并进行链码匹配，最终确定发生变化的区域。

Standing high on the tee one can view the small island surrounded by water, and the most challenging range lying on the left corner of the island with two sand pits connected in a complex manner, players can feel a sense of shock by all the scenes in front. They must master the strength and direction of the wind on that day to make sure of a good shot. The big and steep range makes the ball go faster and is a difficult test for players.

第九洞全长195码，标准杆数3，从高高的发球台向右前方望去四面环水的小岛上，最具挑战性的果岭斜卧在小岛左隅，前后两个沙坑相辅相成，相应成辉，虎视眈眈的与发球台遥相呼应，开阔的湖面泛着微光，令人望而生畏，要求球手们一定要掌握好当天风力的强度和风向，才能使球安全的落在球洞区上，大而陡的果岭使其速度更快，这又是考验球手的绝妙一笔。

It includes a project and file manager, a source editor with syntax highlighting and procedure navigation, a context-sensitive help system, and much more.

它包括一个项目和文件管理器，一个支持语法高亮显视和过程导航的源码编辑器，一个上下文敏感的帮助系统，等等。

Extraction of edge detection and contour following and some of code, very useful, you will need them.

详细说明：边缘检测提取及轮廓跟踪及一些化码，很有用的，你一定用得上。

For this reason, I decided to write my own hyperlink control code based on Neal Stublen's work.

为此，我决定写我自己的超连结控制码的基础上奥尼尔Stublen工作。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。