查询词典 variation principle

Objective To understand the hereditary and variant characteristics of rubella virus, especially the strains isolated from China, investigating the epidemical trend and variation principle of RV.

目的 阐述风疹病毒的遗传变异规律及分子流行病学特点。

In Laplace space, the exact element stiffness matrix of the axial, torsional and bending vibrations of cone-shaped and symmetrical closed thin-walled bars are derived. By use of variation principle, the element stiffness matrix of the coupling vibrations of an asymmetrical closed thin-walled bar is also given.

在拉氏空间中导出了锥形杆件和对称闭口薄壁杆件的轴向、扭转和弯曲振动的精确单元刚度矩阵，应用变分原理也给出了非对称闭口薄壁杆件耦联振动的单元刚度矩阵。

Focusing on such several key issues of flood utilization as resources in a basin as potentiality of flood resources in a basin, seasonal variation principle of storm flood in a basin, stage quantitative description method during flood period, computational method of stage design flood and risk design of adjustment and application of limited level of reservoir during flood season, deepgoing study is conducted in this dissertation.

论文围绕流域洪水资源利用的若干核心问题：流域洪水资源化潜力、流域暴雨洪水的季节性变化规律、水库汛期分期定量描述方法、水库分期设计洪水计算方法以及水库汛限水位调整运用的风险设计等进行了深入研究，构建了利用水库汛限水位调蓄洪水资源的理论体系和技术框架。

Based on Lagrangion function in the form of a volume integration of liquid pressure superposed on the standard Lagrange function (kinetic energy minus potential energy), corresponding to liquid subsystem and structure subsystem respectively, the nonilnear coupled dynamic equations of the coupling system are established by means of variation principle and Lagrangion equation.

对液体子系统和结构子系统分别得到压力体积分形式的Lagrange函数和标准形式Lagrange函数，由变分方程和Lagrange方程可以建立系统的动力学方程。

The algorithm samples the system status from the optimal probability density and reduces the sample variance by using the variation principle and interval fitting.

该算法采用变分运算分析和区间拟合的方法，实现在最优密度函数下抽样，降低计算方差。

The equation of the cylindrical shell subjected to underwater explosion shock wave is derived from Hamilton variation principle, considering the fluid-structure interaction .

首先，计及流—固耦合作用的影响，文中由Hamilton变分原理推导出了圆柱壳受爆炸载荷作用的控制方程。

Structural natural period s are important indexes to reflect on absorbed seismic energy, a formula for structural frequency is deducted according to variation principle in this paper, various ap.

结构自振周期是直接反映结构吸收地震能量多少的重要指标，本文基于能量变分原理推导了结构频率的计算公式，介绍了工程中计算结构自振周期常用的几种近似方法，讨论了影响结构自振周期的主要因素。

Based on Hamilton variation principle, the equations of motion for the moderately thick rectangular plate with transverse surface penetrating crack on two-parameter foundation are established.

基于Hamilton变分原理，考虑板的横向剪切变形和地基耦合效应，建立了双参数地基上含横向表面贯通裂纹的中厚矩形板的运动控制方程。

The research on a general variation principle for web offset press while it is running is carried out in this paper.

本课题对卷筒纸印刷机在印刷过程中张力变化的一般规律进行了研究，建立了较符合实际情况的张力变化的一般规律数学模型，并用Matlab软件对模型进行仿真分析。

Results There was a typical single-peak in its variation principle.

结果］铺地竹叶片营养成分的季节动态变化呈典型的单峰型。

Do not gum up the work by telling mother what we are going to do .

别告诉母亲我们要干的事，那会把事情搞糟的。

In recent years, application of the partial prestressed concrete beam s is developed.

近年来，随着部分预应力砼梁应用的推广，发现我国规范所采用的名义拉应力法的计算结果不稳定。