查询词典 variable star

Its benefit is that different structural sizes can be controlled by single design variable, such as the thickness of plate element and the area of bar element can be controlled by single dimensionless design variable.

采用无量纲设计变量为了适合工程实际的设计变量连接，利用无量纲设计变量，其好处是可以跨单元、跨截面的用同一个设计变量控制不同类型的结构尺寸(如板单元的厚度、杆单元的截面面积等)。

If the GRID_SECURITY_DIR environment variable is set, the grid security directory is the value of that environment variable.

如果设置了X509_CERT_DIR 环境变量，受信任的证书的目录是这个环境变量的值。

This is the var keyword, followed by the name of the variable, followed by its type, followed by an equals sign and an initial value for the variable.

这里有一个var关键字，后面跟着变量名字和变量的数据类型，再后面可以用"＝"符号来进行赋值。

Many high-rise buildings can be simplied into variable cross-section cantilever beam, which equation of free vibration is variable coefficient differential equation of higher order and there is no general solving process for which in mathematics.

对这类方程，数学上没有提供一般的解法。本文采用的级数解法可求出任何变系数的四阶微分方程，在给定边界条件下的解。

Changing the scale of one x variable will lead to a change in the scale of that coefficient and standard error, so no change in the significance or interpretation on this variable and other variables.

改变一个变量x的测度单位会导致该变量系数和标准差的相应改变，所以所有解释变量显著性和对其解释没有改变。

A variable-step modified Euler time integration method is proposed and analyzed. Four major factors that affect the efficiency of the variable-step modified Euler time integration method are discussed. These include stability and accuracy analysis for the damped fix-step modified Euler integration formula, adjustment method of the fix-step basic integration formula to accommodate step-size changes, suitable range of the step-size selection strategy based on truncation error concept and development of the step-size selection strategy based on apparent frequency concept to satisfied the specified error bound and stability condition.

提出了变步长修正Euler时间积分法，详细讨论了影响变步长修正Euler时间积分算法效率的四个主要因素，它们包括：有阻尼问题的修正Euler法的稳定性和精度分析，调整固定步长的基本积分公式使之容纳步长大小变化的研究，基于截断误差概念的步长大小选择策略适用范围的讨论，同时满足规定误差界和稳定性条件的、基于表观频率概念的步长大小选择策略的建立。

An exogenous variable is a variable that is not explained by the model but rather is taken as given.

外生变量是模型本身不予以解释而是当成已知的变量。

Secondly, is China's money supply an exogenous variable or an endogenous variable?

其二，货币供给的内生性与外生性问题。

Traditional economics regards institution as a given exogenous variable, while the institutional economists treat institution as an evolutional endogenous variable of economic development.

与传统经济理论把制度视为既定的"外生变量"不同，制度经济学认为制度是会变迁的、进而影响经济发展的"内生变量"。

The results demonstrate that: ARMA(1,1) model,auto-regressive model with GDP as exogenous variable,auto-regressive model with policy as exogenous dummy variable,and logarithm linearity and removal average model are all valid models for forecasting tax revenue.

结果表明：ARMA(1，1)模型中，以GDP为外生变量的自回归模型、以政策因素为虚拟外生变量的自回归模型以及对数线性移动平均模型都是预测税收收入的有效模型，但以GDP为外生变量的自回归模型在预测2005年税收收入时，预测值与实际值的预测偏差仅有1。

Don not attempt to do something which you can not to do.

不要企图做那些办不到的事情。

The expression of CTGF and TNF-αweredetected by immunochemistry and the number of Clara Cells was calculated.

光镜下观察肺组织的病理变化，采用免疫组化染色观察肺组织中结缔组织生长因子和肿瘤坏死因子-α的表达和Clara细胞的数量。