查询词典 random

In this paper, the regression estimation for multivariate simple random sampling and stratified sampling is discussed, it is proved that this method is more available than the estimation without auxiliary variable, and some statistical inferences of population mean are given.

文章系统地讨论了多元简单随机抽样及分层抽样的回归估计法，说明与无辅助信息抽样相比，回归估计法是一种更有效的方法，并得出了总体均值的一些统计推断。

Then we define the stable distribution with four equivalent ways and analyze its properties carefully. To study the stable distribution, we must know how to simulate its random variables. We can learn it intuitively by watching its plot of density function.By adding an auxiliary variable in the Chapter 4, we estimate the four parameters using Gibbs sampler.

接着给出了稳定分布的四种等价定义方法，详细的分析了稳定分布的性质，提出如何利用简单随机数产生稳定分布的随机变量以便我们进行分析研究，借助稳定分布近似密度函数的图形我们对它的特征会有更加直观的认识。

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。

A total of 520 10 mer random primers were used to identify the RAPD markers linked to the Yr5 gene between the near isogenic line Yr5/6 ×Avocet S and recurrent parent Avocet S.

共用 5 2 0个 10碱基随机引物对小麦抗条锈基因Yr5的近等基因系进行了RAPD分析，发现了 3个特异性DNA片段S14 96 76 1 、S14 5 3880 、S14 181 950 与Yr5基因连锁，其中S14 96 76 1 与Yr5基因紧密连锁，遗传距离为 2 7cM。

There is at least one alternative axiomatization of probability theory by means of expectations on C-star algebras of random variables . In this case the method goes by the name of Gelfand-Naimark-Segal construction.

这是类似于两种方法来衡量和一体化，在这里，可以选择建造措施的规定和界定积分第一后，或构建积分第一，并确定一套措施，积分特性的功能。

A processor generates the random number in relation to a back electromotive force value.

处理器生成关于反电动势值的随机数。

Random in the neighborhood I asked, the majority of citizens said that, as we all know that this is a lie SMS, generally ignored upon receipt; but others find it annoying, they criticize a few messages back out of vent.

笔者在街坊的随机询问中，大部分市民表示，大家都知道这是骗人的短信，收到之后一般置之不理；但也有人觉得实在可气，便回短信骂几句出出气。

Lisa Pfund of Random Lake, Wis., says her daughter, 19-year-old Amber Bahr, was shot in the stomach but was in stable condition.

19岁的 Amber Bahr胃部中枪但是目前情况已经稳定。

RAPD (random amplified polymorphic DNA) analysis was employed in order to detect genetic relationship in 45 balsam pear Momordica charantia L.

利用RAPD技术对来自国内外的45份苦瓜栽培品种进行了亲缘关系分析。

Methods We analyze the acute pancreatitis cases who were cured by conservation therapy retrospectively. We divided the patients into two groups each one has 40 patients.We give mannitol to one group random and not to another group. We compare the clinical symptoms,physical sign fading time ,the Balthazar grade of CT examination after treatment for three days and by statistic methods.

对经保守治疗好转的急性胰腺炎病例进行回顾性分析，从中随机抽取40例辅助使用甘露醇的病例和40例未使用的病例分成两组，通过对比使用组与未使用组临床症状、体征缓解的时间及治疗3天后CT检查的Balthazar评分，并进行统计学处理。

He has to relate with three women in the movie, and yet remain implicitly faithful to the unseen Lucinda.

让克劳德布里亚里成功地饰演试验了一个难度很大的角色：和三个女人打交道，但还要底下对观众未曾谋面的卢馨达保持忠诚。

The experiment was conducted to study effects of inulin on the growth performance, indices of immune organs and serum immunoglobulin of laying chicklings as well as the performance of inulin which replaced the antibiotics in diets by adding 0.2%, 0.4% and 0.8% of inulin, respectively.

试验旨在通过在蛋用雏鸡日粮中添加0.2%、0.4%和0.8%的菊粉，研究菊粉对蛋雏鸡生长性能、免疫器官指数和血清免疫球蛋白的影响，以及菊粉替代抗生素对蛋雏鸡的应用效果。