随机的

Chapter 7 at first introduces the elementary theory of subentry coefficient designing methods and deduces the calculational formula of single safety factor considering the reliability, then propounds the numerical calculation method of random safety factor to make foundation for deep investigation.

第七章先介绍了分项系数设计法的基本原理，推导了可靠性意义下的单一安全系数的计算公式，然后提出了随机安全系数的数值计算方法，为进一步研究随机安全系数打下基础。

Substantively, the complexity that water level is influenced by all of the factors and their strong nonlinear random disturbance .

实质上冲淤河道水位表现的复杂性是由于其中存在着很强的非线性随机扰动，因此需要有效分离出显著性随机扰动，以抑制模型误差的方差，达到减小误差的目的。

There are very sophisticated randomized algorithms for convex and non-convex optimization that rely on recently-developed methods for approximately generating uniformly distributed random variables on convex sets.

有一些关于凸型和非凸型最优化的非常复杂的随机算法，它们依赖于最近研究出的一些方法，在凸型集合中近似地产生平均分布的随机变量。

In this paper, a new random algorithm is introduced for the classical problem of estimating the cardinality of a union of sets, which only needs pair -wise independent random input.

仅用成对独立的随机变量作为输入，得到了一个关于估计并集的基的问题的随机算法。

Using the theory of Expected Utility to evaluate the risk of project by the probability distribution of projects NPV.

通过分析影响项目经济效益指标的不确定性因素，确定了模型的随机变量；根据基本净现值模型提出了随机净现值模型；通过项目净现值的概率分布运用期望效用理论对项目的风险进行评价。

The vertex set denotes random variables at different times, and the directed edges denote causal dependence between the variables.

定义了线性条件互信息图，图中的结点表示时间序列不同时刻的随机变量，结点间的边表示随机变量之间存在的因果相依关系。

This paper first Studies the relation between coefficients and the growth of Dirichlit se-ries of zero order in the whole plane,and further proves that the growth of random entire functions defined by random Dirichlet series of zero order in every horizotal straight lines is almost surely equal tothe growth of entire functions defined by its corresponding Dirichlet series.

首先研究了全平面上零级狄里克莱级数的系数和增长性之间的关系，然后证明了对于本级随机狄里克莱级数所确定的随机整函数，在每条水平直线上的增长性几乎必然

Comparative analysis with the other non-stochastic model constrained by facies shows that the stochastic waterflooding model constrained by facies is consistent with the flooding conditions and rules, it also consistent with the rules of reservoir development and aeolotropism distribution, the result is more reliable, which can provide the effective foundation to adjust and tap the potential for this area.

与非相控随机建模方法预测的模型对比分析表明，相控下的随机水淹模型比较符合油田开发过程中的水淹状况及规律，符合储层发育及其非均质性分布规律，可信度高，为该区调整挖潜提供了重要的地质依据。

In order to screen a therapy treating both principal and secondary aspect of disease for neuroleptic-induced astriction, 174 inpatients given neuroleptics were randomly selected and divided into 4 groups. Groups A, B, and C orally given Vit B1, warm salt water, and sennamixture respectively were compared with control group one by one using χ2 test.

为了筛选出一种对抗精神病药所引起的药源性便秘进行标本兼治的方法，作者通过随机抽样，对住院的174例服用抗精神病药的病人随机分为A、B、C、D组(前3组为用药组，第4组为对照组)，分别口服Vit B1、温盐水、蕃泻叶合剂与对照组逐个进行对比观察，进行χ2检验。

The paper is organized as follows. In chapter 2, we introduce some concepts about SEA, the abstract SEA model and the convergence definition of algorithm. In chapter 3, we describe firstly the evolution of PMA as an abstract stochastic process, and by characterizing axiomatically the properties of the fundamental selection and evolution operators, we conclude that PMA is essentially a kind of SEA.

本文结构安排如下：第二章介绍了模拟进化算法的一些基本概念、形式化随机过程描述以及收敛性定义；第三章对改进后的 PMA 各操作作了抽象定义，得到了 PMA 的形式化随机过程描述，并公理化地证明了各操作算子为选择或繁殖算子，从而得出 PMA本质上也是一种模拟进化算法；第四章先对选择算子特征数定义作了适当改进，并通过各进化算子的具体特征数指出，如果 PMA 不采取任何执行策略时，算法本身并不收敛。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。