随机性

Considering the randomness of both elastic module and mass density of the structures, the element′s structural stiff and mass matrix have been built, the structure dynamic characteristics is analyzed based on probability, and the digit characteristics of natural frequency random variable is derived from the Rayleigh′s quotient.

利用随机因子法，建立了考虑结构弹性模量和质量密度同时具有随机性时结构的刚度矩阵和质量矩阵；从结构振动的瑞利商表达式出发，利用代数综合法推导出结构特征值随机变量数字特征的计算表达式。

In study of the truss structural dynamic characteristics analysis, randomness of the structural physical parameters and geomtric ones are all considered. The finite element model of the stochastic truss is built and the random functions of its natural frequencies are obtained by use of the Rayleigh quotient. Employing probabilistic distribution function expression for the random functions, through a series of mathematical processing including determination of limits of integrals, variable substitution etc., the probaabilistic density function for the truss natural frequencies are gained to realige accurate calculation for the reliability of the truss natural frequencies.

考虑结构物理参数和几何参数的随机性，通过构建随机参数桁架结构的有限元模型，利用瑞利商公式获得了结构固有频率随机函数的计算表达式，应用随机函数的概率分布函数表达式，通过确定积分区间、变量替换、积分顺序变换等一系列数学上的处理，获得结构固有频率的概率密度函数，进而实现对结构固有频率可靠度的精确计算。

The theory has been developed into infinite dimensional dynamical system by many scholars, such as Magalhes, Sacker and Sell, Chicone and Latushkin, Chow and Leiva. Also, Cong and Siegmund discussed some kind of dynamical systems in some random sense.

es，Sacker和Sell，Chicone和Latushkin，Chow和Leiva等推广到了无穷维动力系统中去，Cong和Siegmund还讨论了具有随机性的动力系统的Sacker-Sell谱问题。

In a network with wormhole routing , the message arrival is not a simple event, but a lasting process with stochastic character.

在采用虫孔寻径的网络中，消息的到达不是一个简单的事件，而是一个具有随机性的持续过程。

Response spectrum method based on vibration separated is a fit means for horizontal seismic analysis of single storey unequal height mill building.

现行规范中的底部剪力修正系数法误差的随机性较大，建议对于单层不等高厂房抗震分析采用振型分解法。

Because of the uncertainty of indexes in the process of classifying solonchak soil,the entropy value theory is applied to combining the traditional fuzzy comprehensive evaluation method for salt-affected soil classification.

针对盐渍土分类中客观存在的模糊性与随机性，将信息论中的熵值理论引入盐渍土综合评价中，运用信息熵所反映数据本身的效用值计算盐渍土评价中各指标的权值，使得权值的分配有了一定的理论依据，并结合传统的模糊综合评判法对盐渍土做出评价。

It can search the global optimal solution in solution space based on its search mechanism and randomness.

它借助搜索机制和随机性，能够搜索问题域的全局最优解，并且对噪声表现出很好的鲁棒性和自适应能力。

The ocean internal wave has randomness, and this is considered as one of primary causes to the fluctuations of sound field.

海洋内波具有随机性，这被认为是导致声场起伏的主要原因之一。

S. chamaejasme seeds dispersed very randomly on all the eight directions including eastward, southward, westward, northward, northeastward, southeastward, southwestward and northwestward, and showed no common dispersion regularity.

狼毒种子在东、南、西、北、东北、东南、西南、西北8个方向上的散布格局表现出极大的随机性，没有共同的散布规律。

Because wreath tablet the hair feather of the yarn appearance with spin cotton serial number, yarn Nian degree, thin spindles soon, the involution take shape all of etc.s to spin cotton craft parameter to have direct influence, in the meantime because of wreath tablet the hair feather of the yarn appearance have no rule, at yarn surface of distribute and present random, even each segment of yarn length of same yarn size reflection of the hair feather be average value, the hair feather of various length value usually difference also big.

由于环锭纱线的毛羽状态与纺纱号数、纱线捻度、细纱锭速、卷绕成形大小等纺纱工艺参数有直接影响，同时由于环锭纱线的毛羽形态无规则性，在纱线表面的分布呈随机性，即使同一纱线大小纱各段长度反映的毛羽平均值，各种长度的毛羽值往往差异也大。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐