形式化

Based on White event algebra, the formal framework is extended for event algebra, considering semantic definition of events in more concise temporal relationships of events to enhance the expressiveness of event query language while taking into consideration event selection and consumption policy-the context consumption policy to improve the performance of event detection.

基于White事件代数，扩展了事件代数的形式化框架，在形式化框架中考虑复合事件在更精细的时间关系下的语义定义，以增强事件代数的表达能力，同时考虑与应用相关的事件选择和消费策略-上下文策略，以提高事件检测的性能。

It is important for the application of formal approach and formal specification in all stages of software development to study and design automatic refinement from Z to high-levellanguage: Insure complete formalization in all stages of software development; Avoid antilogy in refinement due to mistaken operation or computative mistake and insure consistency and integrity of system; Due to avoiding manual operation in refinement process, it is feasible to bulid a compile environment that Z specification automatic refine and form high-level programme, this will accelerate the promotion and application of Z in industry.

Z到高级语言自动求精的研究与设计对于形式化方法及形式规格说明应用于软件开发的各个阶段具有非常重要的意义：确保了从需求分析阶段开始的软件开发周期的完全形式化；避免了人工的误操作或演算错误导致的求精前后不一致，保证了系统的一致性和完整性；由于求精过程避免了手工操作，因而Z规格说明自动精化为程序代码的编译环境可以建立，这将会加速Z规格说明在工业界的推广应用。

Our work principally focuses on formal representations of protocol specification and atomicity requirements.

现在检验的手段有多种，比如：直观的分析，实际攻击测试和形式化的检验分析技术犤1犦，其中形式化技术以其手段的严密和断言的普遍使用见长。

Provable Security is a formal method for proving the security of cryptographic schemes, in which the difficulty of breaking a particular scheme is formally related to that of solving a widely believed computational hard problem. Provable security has already become an important theme of theoretical researches in modern cryptography. This dissertation investigates the provable security of public-key encryptions and hybrid encryptions of asymmetric and symmetric encryptions. This includes the various formal security notions and the constructions can be proved to achieve them. Among the constructions, hybrid encryptions are themselves an important way to obtain public-key encryption schemes with chosen ciphertext security. The main results are as follows:(1) The one-wayness of the trapdoor one-way function in NTRU depends on the randomness of the session key, which is different from previous ones. Based on this observation, a new kind of trapdoor one-way function, trapdoor one-way functions with an auxiliary random variable is proposed.

可证明安全性是一种证明密码学方案安全性的形式化方法，它将密码学方案的安全性归约为公认的计算难题，已成为现代密码学领域中理论工作的主线，本文主要研究公钥加密与单双钥混合加密的可证明安全性，这包括它们的各种形式化安全性定义以及达到这些安全性定义的方案构造，而单双钥混合加密本身也是一种构造选择密文安全公钥加密的重要方法，本文得到的主要结果如下：(1)在研究NTRU公钥加密的特殊性基础上，对于公钥加密的陷门单向函数加密模型进行了扩展，提出了具有辅助陷门单向函数的概念，并将其扩展到多元的情况，讨论了可能的密码学用途。

The study of formalized definition of HNC concept expression aims at building a system of word semantic knowledge for automatic semantic annotation so that the formalization of semantic annotation symbols and calculability of the meaning of words can be realized.

研究HNC概念表达式的形式化定义，旨在为语料库的自动语义标注建立语义知识表示体系，实现语义标注附码的形式化，实现语义的可计算性。

It describes functions of protocol design and maintenance with formal technique, which is software engineering of communication protocol.

协议工程是形式化的协议开发过程，它使用形式化的方法来描述协议的设计和维护中的各个活动，它是研究对象为通信协议的软件工程。

Chapter 3,"Formalization knowledge rule",it links the development ofmodern nature science and formalization science to introduce the formation of theformalization knowledge rule,and its contents,characteristics and development.

第三章"形式化知识规则"，联系现代自然科学和形式化科学的发展，介绍了形式化知识规则的形成，其内容、特点及其哲学史考察。

This paper describes an approach to reverse engineering based on the formal semantics of the strongest postcondition predicate transformer,and the partial correctness model of program semantics introduced by Hoare. The main point of our investigation is how to use informal and formal methods for reverse engineering. The approach provided by this thesis is mainly to process the C program system for reverse engineering.

本文描述的逆向工程中的形式化方法采用最强后置条件谓词转换技术和Hoare理论中有关程序语义的部分正确性模型，研究的重点是利用形式化技术和非形式化技术对程序代码进行逆向工程，以支持软件理解和维护。

But specifications written in formal are prolixity and boring, so it needs a structured way to decompose and organize for writing and understanding more easily.

但用形式化方法书写的系统规格说明往往是冗长而乏味的，为了帮助开发人员书写和理解形式化说明，需要一种结构化的方法来分解、组织形式化说明，使之具有灵活性和可管理性并具有良好的风格。

To conquer limitations of existing techniques for developing loop invariants, professor Xue Jinyun, who is imbursed under two National Nature Science Foundation of China, systematically research the theory and method of loop invariants and advanced the new definition and developing strategies for loop invariants. Based on above, he presented efficiency method of developing algorithmic program, Partition-and-Recur Approach, and its developing environment which bring into important play in formal method.

为了克服已有循环不变式开发技术存在的局限性，薛锦云教授在两个国家自然科学基金课题&若干新的算法程序设计和证明方法研究&和&实用的软件形式化方法及其开发工具的研究&的资助下，对循环不变式的理论和方法进行了系统的研究，提出了关于循环不变式的新定义和新的开发策略，并在此基础上形成了一种实用的算法程序形式化开发方法及其开发环境，在复杂算法程序及软件形式化开发中发挥了重要作用。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了