随机的

In the formulas of stochastic input and output, when the coefficient of direct consumption and final demand are exponentially distributed, the interrelationship between parameters of stochastic variables can be divided into three types: all the parameters are the same; parameters are inequivalent to each other; some of the parameters are the same, but the rest are inequivalent to each other.

在随机投入产出方程中，当直接消耗系数和最终需求为指数型随机变量时，方程中随机变量分布中参数间的关系有3种基本情况：所有参数都相等、所有参数两两不相等、有部分相等而其余则两两不相等。实际上，前2种情况是第3种情况的特殊形式。

An analysis of a one-and multi-story model of a torsionally coupled base isolated building for one-and two-lateral component ground motion is presented.

基于随机理论，研究了基础隔震结构的随机反应。地震动是随机和多维的，以功率谱密度函数描述。

AIM: To explore the treatment effect of the integration of traditional Chinese medicine and western medicine on chronic obstructive pulmonary disease patients in the tranquilization period. METHODS: Randomized controlled trial was conducted.

采用随机、对照、单盲的临床试验方案采用随机对照单盲临床研究方法，将在呼吸专科门诊入选的COPD稳定期患者63例随机分为治疗组（n=32）与对照组(n=31)。

METHODS: Randomized controlled trial was conducted. Sixtythree COPD cases in the tranquilization period from our respiratory clinic were divided into two groups and were given basic western medical treatment.

采用随机、对照、单盲的临床试验方案采用随机对照单盲临床研究方法，将在呼吸专科门诊入选的COPD稳定期患者63例随机分为治疗组（n=32）与对照组(n=31)。

A new method is suggested to solve the problem of nonstationary random responses of elastic-viscoelastic composite structures. The correlation characteristics of responses under uniformly modulated or ununiformly modulated random excitations are obtained.

提出了演变随机激励下弹性-粘弹性复合结构非平稳随机响应特性的一种分析方法，分别讨论了均匀调制和非均匀调制两种情况下粘弹复合结构系统随机响应的相关特性。

In view of great uncertainty factors in the effect of shrinkage and creep, stochastic finite element method is applied to structural analysis. It can calculate the coupled stochastic response of uncertainty factors through randomizing input variables representing the stastics stochastic factors.

4考虑到收缩徐变效应分析中大量不确定因素的存在，本文引入随机有限元理论，通过对这些随机因素进行统计分析并作为输入变量，有效地计算模拟了不确定因素的混合随机响应。

ABSTRACT This paper is mainly concerned with the reliability analysis of a gravity abutment of an arch dam based on conception of reliability.

再与可 靠度理论相结合，考虑变量的随机特性，通过随机有限元法建立荷载效应与基本随机变量之间的关系。

Pseudo-random multi-frequency signal is invented and named by academician He Jishan. The bandwidth of PRMF signal is controllable, it's energy concentrates on several frequencies, which are equally spaced on log scale coordinates. It is ideal excitation source for electrical exploration.

中文题名伪随机多频电磁法观测系统研究副题名外文题名 The study on pseudo-random multi-frequency electromagnetic prospecting system 论文作者陈儒军导师何继善学科专业地球探测与信息技术研究领域\研究方向学位级别博士学位授予单位中南大学学位授予日期2003 论文页码总数165页关键词电法勘探电磁法伪随机多频信号馆藏号BSLW /2003 /P631.3 /4 伪随机多频信号由何继善院士发明和命名，该信号带宽可控，其能量集中在数个在对数坐标上呈等间距分布的频率上，是电法勘探的理想场源。

Aimed at the large deformation problem of industry cooling tower shell, the mathematical model for the random response of rotational shell under the external random excitation is established by statistic perturbation method.

针对工业冷却塔结构大变形的随机动力问题，利用统计摄动方法，考虑旋转壳法向几何非线性及随机激励作用，建立了旋转壳的非线性随机动力响应数学模型。

The approximate stochastic solution of the plane wave and the propagation behaviors are obtained by means of stochastic functional approach.

假设二维随机介质具有各向同性窄带高斯谱，运用随机泛函理论给出了二维介质中随机平面驻波的解析近似解及其幅度和相位的定量统计特性。

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