历史查询   





 为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法，我们为您准备了出自英文原文的大量英语例句，供您参考。 
In this formulation, a power law of the socalled solid isotropic material with penalty model is employed to approximate the relation between the element stiffness matrix and density variable.


The genotype fitness depend only on population density but include onehump functions of the density variable.


With a view to overcoming this difficulty, a viscosity implicit equation of state in the form of T=T(P, η), avoiding the density variable, is obtained using the MLFN technique, starting from the same data sets as before.


An analysis is made of the stress state of a cylinder made of a composite with reinforcement density variable in the circumferential direction


A tanning facility density variable was created by dividing the city's number of facilities by its population size.

 更多 
In this formulation, a power law of the socalled solid isotropic material with penalty model is employed to approximate the relation between the element stiffness matrix and density variable.


The genotype fitness depend only on population density but include onehump functions of the density variable.


With a view to overcoming this difficulty, a viscosity implicit equation of state in the form of T=T(P, η), avoiding the density variable, is obtained using the MLFN technique, starting from the same data sets as before.


An analysis is made of the stress state of a cylinder made of a composite with reinforcement density variable in the circumferential direction


A tanning facility density variable was created by dividing the city's number of facilities by its population size.

 更多 


 Based on clear physical concepts, complete nonlinear dynamic equations of twophase media are derived by using classic mechanical principle directly. Then, two conditions under which the nonlinear equations can be linearized are expounded. The conditions are that varieties of the porosity and density with spatial position are much smaller than those with time in the dynamic process, and alterations of the displacement and pore fluid pressure induced by porosity or density changes can be omitted. Thus, the variables... Based on clear physical concepts, complete nonlinear dynamic equations of twophase media are derived by using classic mechanical principle directly. Then, two conditions under which the nonlinear equations can be linearized are expounded. The conditions are that varieties of the porosity and density with spatial position are much smaller than those with time in the dynamic process, and alterations of the displacement and pore fluid pressure induced by porosity or density changes can be omitted. Thus, the variables of displacement and pore fluid stress are decoupled with porosity and density variables, and can be resolved independently. Furthermore, the inconsistency that the porosity and density keeping constant is in contradiction with the compressible pore fluid and deformable skeleton assumption in two phase models (including Biot′s) is also clarified through linearization. After comparing some two phase models, the following conclusions are obtained. Firstly, the only differences between them lie in the constitutive relation; secondly, the soil mechanics′ model is a special case of the Biot′s and Zienkiewicz′s model.  本文以清楚的物理概念 ,依据经典力学原理建立了两相介质完整的动力学非线性方程组。然后 ,阐明了将此方程组线性化的条件 :孔隙率、密度随空间的变化远小于它们在该处随时间的变化 ;孔隙率、密度的变化所引起的位移和孔压等量的变化可以忽略不计。在此条件下 ,位移、孔压等变量与孔隙率和密度变量解耦 ,可独立地进行求解 ,澄清了Biot等模型中隐含的矛盾 ,即孔隙率和密度不变与孔隙流体可压缩和骨架可变形之间的矛盾。最后 ,通过比较几种常用的模型 ,指出它们之间的主要区别在于本构关系和连续性方程 ,且土力学模型是Biot模型和Zienkiewicz模型的特例  
相关查询  


