In this paper a new method for making circular variable density filters is proposed.
本文提出一种制备圆形渐变衰减片的新方法。
A variable density based topology optimization method was applied to the light-weight design of engine block.
将变密度拓扑优化方法应用于发动机气缸体轻量化设计中。
This conclusion lays a foundation for the research to variable density perforation in well completion optimization.
该结论为完井优化中的变密度射孔研究奠定了基础。
The finite element analysis (FEA) and the variable density methods were used. The optimization method and process were presented.
采用有限元法与变密度法，给出了优化方法和步骤。
It is necessary to record the linear scale before and after log and the time difference curve in the acoustic variable density log.
摘要阐述了声波变密度测井时对其进行测前、测后线性刻度及记录时差曲线的必要性。
It is necessary to record the linear scale before and after log and the time difference curve in the acoustic variable density log.
阐述了声波变密度测井时对其进行测前、测后线性刻度及记录时差曲线的必要性。
The status for acoustic variable density log in Daqing Oilfield is introduced including applied techniques and logging tool levels.
介绍了大庆油田声波变密度测井的现状、应用的技术和仪器的水平。
The structural topology optimization method—variable density method is used to optimize the topology of an acoustic_box for interior sound pressure reduction.
基于变密度拓扑优化方法和声-结构耦合系统有限元模型，对四角固支箱体模拟的飞机座舱进行了减振降噪分析。
The variable density model is more suitable for inversion of Moho depths structures than constant density model by comparison of Moho depth from seismic inversion.
通过常密度模型、变密度模型及地震反演得到的莫霍面的比较，证实变密度模型更适合于莫霍面结构的反演。
By variable density method, an optimal topology model is established with the help of the software ANSYS to support the optimal topology design of the horsehead pumping unit.
文章应用有限元分析软件ANSYS。采用变密度法建立拓扑优化模型，对抽油机驴头进行拓扑优化设计。
The variable density multilayered crustal model is put forward according to the idea of model decompose in this paper, and the corresponding gravity forward formula is deduced.
根据模型分解的思想，采用变密度多层地壳密度模型，据此推导了相应的重力异常正演计算公式。
Based on finite element method, variable density method was employed to optimize the configuration of adherends in overlap region, and the curve fitting was applied to attain proper configuration.
在有限元方法的基础上，利用变密度法对单搭接胶接接头搭接区域的被粘物形状进行了拓扑优化，通过曲线拟合得到了较为合理的轮廓。
The dynamics of axisymmetric free shear flows, axisymmetric variable-density jets and wakes of cylinders have been studied, to a certain extent, under this framework.
基于此种实验研究框架，本文对轴对称自由剪切流、变密度轴对称射流以及圆柱尾迹进行了一定的研究。
This section of the course develops the mathematical concepts used in statistics. Three ideas are essential: Random Variable, Density Functions, and Expectations.
此部分课程扩展了统计学中的基本数学概念。三个基本想法如下：随机变数，密度函数与期望。
This section of the course develops the mathematical concepts used in statistics. Three ideas are essential: Random Variable, Density Functions, and Expectations.
此部分课程扩展了统计学中的基本数学概念。三个基本想法如下：随机变数，密度函数与期望。
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