随机

All subjects were selected from in Ganquan subdistrict of Putuo District, Shanghai. 151 community elderly were collected. The age ranged from 70~89 years old. It was random divided into two groups, cognitive intervention group (90 samples) and control group (61 samples).

对上海市甘泉街道的社区老人（年龄≥70岁）按居民里委进行随机整群抽样筛查，将151例符合入组标准的老人随机分为认知干预组(以下简称干预组，90例)和对照组（61例）。

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。

Implementation of the Subtree Method and Truncated Subtree Method in [10] are given.

我们还给出了一种随机生成方法，在生成随机方程组的同时就确定了最小m-Bezout数及其对应的剖分。

The necessary condition of an important result of the probability that the supremum of a random walk with heavy-tailed increments crosses a curve on a random time interval is presented by using an important property of a general distribution class.

利用一类常见分布族的一个重要性质，给出了增量带重尾分布的随机游动在随机时段内的上确界超越曲线边界的概率的一个重要结果的必要条件。

The symmetric algorithm is a traditional algorithm, it is easy and efficient, and so it is still being popular used. The stream cIPher and the block cIPher are two part of the symmetric algorithm. The symmetric algorithm uses the key to control the key stream generator, and then the generator produces a random stream. We can get the cIPher by xor the message and the random stream by bit. In the field of communication and code, the stream cIPher has always been the key cIPher of the military affairs and foreign affairs.

对称密码体制分为序列密码和分组密码两类，序列密码以密钥控制密钥流发生器，产生一随机序列，用这个随机序列和明文信息逐位异或，就得到密文，其加密单元为比特。

Generally say that random access within a tape cartridge is about a thousand times slower than random access on disk.

一般来说，对磁带的随机访问比对磁盘的随机访问要慢一千倍。

Sperry showed that the regenerated retinal axons always innervated the original sites of termination in the optic tectum. This experiment strongly disprove the resonance hypotheses proposed by Paul Weiss, who suggested that the nerve growth and synapse formation are largely random events, and the precision of connections between nerve cells emerged by selectively eliminating the inappropriate connections, only at later developmental stage.

Sperry的实验在支持Cajal假说的基础上，进一步明确发育过程中轴突的生长及突触的形成具有内在决定性，并且有力地反驳了当时占主流地位的由Paul Weiss于1930～40年代提出的resonance hypothesis，后者认为轴突的生长和突触的形成大多是一些随机事件，成年脑中的精确联系是通过对随机形成的不恰当联系进行选择地消除形成的。

Based on the telegraph equation, the stochastic model for transmission lines isproposed, and the precise integration algorithm is combined with Monte Carlo method toanalyze the transient response of the stochastic model. Jarque-Bera test is made for thenormality of the model\'s output and the worst-case estimation is given.

基于电报方程建立了互连线的随机模型，结合精细积分算法与蒙特卡洛方法分析了该互连线随机模型的瞬态响应，通过对模型输出信号的正态性进行偏度-峰度检验给出了最差情况估计。

By expanding the L-B model and integrating the impulsions into the model, we can conclude the different influeces to corporation value and debts level come from different impulsions:1 The change of demand——If the demand increases temperately, the corporation value also increases and the firm will increase its debts level, vice versa.2 The change of technology——New technology reduces products\' cost and improves the corporation value, the firm will increase debts level. 3 The unsymmetrical change of the firm\'s decision——The leader\'s corporation value increases and will increase its debts level, the follower is contrary.

对L—B模型进行扩展，将随机冲击的影响纳入模型，可以导出随机冲击对企业整体价值、负债水平产生的不同的影响：1市场需求变化——当市场需求温和上升时，企业整体价值上升，企业有增加负债的动力；温和下降时情况相反。2技术更替——技术更替降低了产品成本，提高了企业的整体价值，企业有增加负债的动力。3非对称的市场决策变化——领导企业的整体价值上升，有增加负债的动力；跟随企业则相反。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。