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In recent 20 years, System identification as one of the important ways to establish mathematical model of the controlled object has been developed rapidly and become one of the automatic control theory, a very active and important branch.

系统辨识作为建立被控对象数学模型的重要途径之一，近20年来获得了迅速的发展，已成为自动控制理论的一个十分活跃而又重要的分支。

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。

As power market reformation carries on, power grid is in difficult status at the aspects of modulating peak effectively, operating safely and stably and supplying power reliably. Pumped storage power station has an important effect on safe, stable and economical operation of power grid. Research on benefit's comprehensive evaluation and operation mode of pumped storage power station is the avant-courier and difficulty in the domain of technology economy and management, which has important theory research value and practical significance.

随着我国电力市场改革，电网的调峰、安全稳定运行和可靠供电面临更为严峻的形势，抽水蓄能电站对电网安全、稳定和经济运行发挥着重要的作用，对抽水蓄能电站的效益综合评价和运营模式进行研究是目前国际上技术经济及管理研究的前沿问题之一，也是难点问题之一，具有重要的理论研究价值和实际意义。

As an important component of it,Aerodynamic property is the primary bases of ballistic curve calculation, load calculation,controlling parameter choice, the pushing force of engine choice and material choice,therefore, it is very important to researching the aerodynamic property .

气动特性作为其研究过程中的主要组成部分，它是进行弹道计算、载荷计算和控制参数选择、发动机推力选择、材料选择的原始依据。

As an important part of the intelligent building, the development of the BAS has much important meaning.

因此，作为智能大厦的一个重要组成部分—楼宇自动化系统的研制具有极其重要的意义。

Vascular basement membrane, an important structural component of blood vessels, plays an important role in angiogenesis.

血管基膜是血管的重要组成部分，它在血管生成过程中起着重要的作用。

Vascular basement membrane,an important structural component of blood vessels, plays an important role in angiogenesis.

血管基膜是血管的重要组成部分，它在血管生成过程中起著重要的作用。

Mineral resources are important part of natural resources, also the important basement for the development of human society.

矿产资源是自然资源的重要组成部分，是人类社会发展的重要物质基础。

Everybody knows, of high quality achieve content formerly, it is a when search engine rank important basis, and important rate still is in progressively promotion.

大家都知道，高质量的原创内容，是搜索引擎排名的一个重要依据，而且重要程度还在逐步提升。

equipment support has become the important part of the battle effectiveness along with the modern development,it gradually became the same important position as the battle capability.

随着装备的现代化发展，装备保障已成为战斗力的重要组成部分，它逐渐与作战性能居于同等重要的地位，如何及时、正确、有效地进行决策部署成为现代装备工作的重要目标。

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