从锥壳理论出发，导出计算旋转壳自由振动的一阶微分方程组，采用离散变量法进行求解。
From the theory of conical shells, a set of the first-order differential equations for the shells of revolution are derived. The discrete-variable method is used to solve the differential equations.
首先利用多维逆m序列作为激励输入信号，用实验法建立出空气传送部分的多变量离散状态空间模型。
Firstly, the paper models the multivariable discrete state-space model of the air transmission unit by the lab method, using multi-dimensional inverse m series as input stimulus signal.
枚举法只适用于离散变量的优化。
Enumeration methods are only applicable to dispersed variable optimization.
提出了新的离散变量转轴法。
根据模型特征，提出了新的离散变量转轴法。
In light of the characteristic of the model, a new rotation method of discrete variable is proposed.
为了对直埋管道保温层及其土壤邻域的温度场进行较精确的分析，采用保形映射、分离变量和边界离散法对地下直埋管道的温度场进行分析，得到了级数形式的解。
The temperature field around a straight buried pipe was analyzed using conformal mapping, separation of variables and boundary discretization. A series solution was obtained for the temperature field.
而虚拟变量只能描述价格指数的离散变化，比如在销售淡季虚拟变量法就不能提供精度较高的分析结果。
The dummy variables can only describe discrete changes in price indices, such as selling off-season dummy variable method will not be able to provide high precision analysis.
用优化方法解决离散变量的工程问题，可采用惩罚函数法。
The optimal method-penalty technique can be used to solve discrete variable project problems.
价格指数的变化是连续性的，而虚拟变量只能描述价格指数的离散变化，比如在销售淡季虚拟变量法就不能提供精度较高的分析结果。
Dummy variables can only describe the discrete changes of price index, for instance, using dummy variables in sales off-season can not provide upper precision estimating result.
OTTO法是本文提出的一种可解决混合离散变量优化设计的方法。
OTTO method is proposed for the solution of optimal design of mixed discrete continuous variable in this paper.
用MDCP法(混合离散变量组合形法)求解输油管道优化运行的数学模型，可以比较好地解决这一问题。
The Mixed Discrete variable Complex Programming method (MDCP) is used to solute the mathematical model of oil pipeline.
阐述了改进的离散变量惩罚函数法的原理，给出了三个过程实现的计算机程序，并把其应用于工程实际，证实了此种方法的有效性。
The improved penalty technique theory is stated and its program can realize in three processes the mechanical optimal design. Its application confirms its efficiency.
采用微分求积法对方程中的空间变量进行离散，得到仅含有时间变量的三阶周期系数微分方程组。
By the discretization of spatial variable in the equation, a third-order differential system of equations containing periodic time-varying coefficient is derived.
采用混合离散变量的直接搜索法，在微机上运行成功。
The direct search with mixed discrete variable was used for the de- sign, and it was run successfully in a microcomputer.
剖析了凡是对离散型随机变量使用边际分析法的。实际上都已改变了原来的离散型前提。
The paper analyses the fact that the original discrete premise is actually changed in the situation that the marginal analytic method is used towards the discrete random variable.
剖析了凡是对离散型随机变量使用边际分析法的。实际上都已改变了原来的离散型前提。
The paper analyses the fact that the original discrete premise is actually changed in the situation that the marginal analytic method is used towards the discrete random variable.
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