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This paper calculates the symmetric and asymmetric vortical flow around body of revolution at high angles of atta...

本文用多重线涡模型计算旋转体在低速大迎角下的对称和非对称涡流。

Some useful notations and definitions are give in this chapter.In Chapter 2,a class of discrete-time model of two-cell cellular neural networks with symmetric temptate are investigated. We obtain some results about the stability,asymptotic stability,the existence and attractability of 2-periodic solutions.

第三章讨论了反馈矩阵为非对称矩阵的二元离散细胞神经网络模型的稳定性与渐近稳定性、周期解的存在吸引性，除了得到系统稳定和存在2-周期解的相关结果外，还得到了系统在原点出现类似于Hopf分支的局部分支以及多个吸引4k-周期解的共同存在性。

A pure tone audiogram identified severe bilateral symmetric down-sloping sensorineural hearing loss with otherwise normal caloric testing result. Bilateral optic fundus examination using fluorescein angiography identified retinitis pigmentosa. A diagnosis of Usher syndrome Type Ⅱ was diagnosed based on these findings. The patient has worn a hearing aid with reasonable success, and has been advised to eat green vegetables and fruit to minimize further visual impairment.

纯音听力检查两耳为对称性重度感觉神经性听力障碍，视野检查为周边视野缺损，眼底血管萤光摄影显示色素变性，前庭功能检查正常，经诊断为Usher症候群第二型，目前患者配戴助听器后生活与人沟通尚无大碍、唯视障只能建议其多摄取叶绿蔬果（叶绿素、叶黄素、维他命A等）及眼睛防晒来防止恶化。

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。

Bloor M I G Axially symmetric flow models for hydrocyclones Oxford,Cranfield:BHRA-Elsevier , 1987,null

刘晓敏%蒋明虎%王尊策%赵立新%李枫动态水力旋流器圆管螺旋流场特性研究石油学报， 2003，2

Next we discuss the application of the RMF theory for the spherical and the axially symmetric deformed nuclei.

接下来讨论了相对论平均场理论分别对球形核和轴对称形变核的描述和应用。

In addition, there are many special elements, such as axisymmetric elements for situations in which the geometry, material and boundary conditions are all symmetric about an axis.

此外，还有许多特殊的因素，如轴对称要素的情况下，几何形状，材料和边界条件都是一个轴对称。

So if 2 is invertible in ''R''(when ''R'' is a field this is the same as having characteristic not 2), then we can recover the quadratic form from the symmetric bilinear form ''B'' by

所以如果 2 在''R''中是可逆的(在''R''是一个域的时候这同于有不是 2 的特征)，则我们可以从对称双线性形式''B''恢复二次形式，通过

In section 3 ,we will introduce bilinear form B on Lie colour algebra L. is called quadratic if B is color symmetric .non-degenerate and invariant .In this case ,B is called an invariant scalar product on L .

第三部分介绍了具有双线性型B的李color代数L，如果B是color对称的，非退化的和color不变的，则称是二次李color代数，B则称为不变数量积，给出了理想非退化的定义。

Chapter 2 analyzes the symmetric structure of linear and bilinear control systems.

特别是对于复杂控制系统的结构分析，它确实是一个强有力的工具。

The circulation, consumption and reproduction of the trilogy have not only testified to its historical significance and literariness, but also invested it with new meanings.

该三部曲的流通、消费与再生产不仅验证了其历史意义及文学性，而切还赋予它以新的意义。

If he thought that he could buy me off, he would be wrong.

如果他认为他可以收买我，那他就大错特错了。