查询词典 finite dimensional

Energy deposition at the interface of the particles caused by micro-explosive welding in explosive consolidation of metal powders is analyzed by symmetrical impaction model of uncompressible liquid. Two-dimensional equation of energy in the flow field of explosive welding is deduced and solved by finite difference method. Then the distribution of the temperature in the flow field is calculated on the basis of considering the adiabatic compression.

摘 要：以不可压缩理想流体对称碰撞模型对金属粉末爆炸烧结中由微爆炸焊接引起的颗粒界面附近沉积的能量进行了分析，在考虑热传导效应的基础上推导出了焊接流场中二维形式的能量方程并用有限差分法对其进行了求解，在考虑冲击绝热压缩贡献的基础上计算出了焊接流场中的温度分布。

In the simulation of gas flow, the finite volume method is selected. The three-dimensional time averaged N-S equation, the RNG k -ε turbulent model and the mixed mesh are used. Then the Lagrange particle track model and the uniphase coupling method are used to simulate the gas-solid two phase flow field in the centrifugal fan.

在气相流场的数值模拟中采用了有限体积法和混合类型的网格，以三维时均N-S方程和RNGk-ε两方程湍流模型为基础，利用SIMPLE算法，对离心式通风机进行了内部流场的数值模拟。

The piecewise linear current density recursive convolution in finite-difference time-domain method is used to study the characteristics of one-dimensional unmagnetized plasma photonic crystals with a defect layer.

采用时域有限差分法中的分段线性电流密度卷积算法，研究具有单一缺陷层的一维非磁化等离子体光子晶体的缺陷模特性。

A finite-difference time-domain algorithm is applied to study the one-dimensional unmagnetized plasma photonic crystals with time-varying, collision, warm, isotropic plasma.

采用时域有限差分法给出了电磁波通过时变的、各向同性的、热的、碰撞的等离子体构成的一维非磁化等离子体光子晶体的FDTD算法公式。

A finite-difference time-domain algorithm is applied to study the one-dimensional unmagnetized plasma photonic crystals with inhomogeneous,collision,warm,isotropic plasma under the isothermal hypothesis.

光子晶体的概念最初是80年代末由John S，Yablonovitch E[1-2]等人提出来的，是近年来深受关注的一个新兴的研究方向[3]。光子晶体是由多种介质材料构成，不同介质材料在空间中有周期性的分布结构。

In this article the bulldozing shovel-soil contact system was studied by two-dimensional finite element method. The distributions of the stress and strain in soil were analyzed separately under plane stress situation as well as plane strain situation.

本文运用二维有限元方法对推土铲－土壤接触系统进行了研究，分别分析了平面应变问题和平面应力问题中土壤所产生的应力及应变分布状况；对比了它们在两类平面问题中的差异。

Based on theoretical analysis, a three dimensional non-linear finite element program is developed to examine the effects of alleviating bridge approach differential settlement by emplacing geogrids in the backfill behind bridge abutment. After analyzing the character of stresses and displacements within backfill behind bridge abutments and the interfacial friction action between geogrids and fillings, mechanism of using geogrids to reduce differential settlement is obtained.

在理论分析的基础上，利用有限单元法编制了土工格栅处理路桥过渡段差异沉降的三维非线性有限元程序，并结合工程实例对台背回填的三维性状进行系统分析，研究了铺设土工格栅对台背填土位移场和应力场的影响，分析了土与格栅界面剪应力的大小和分布，从土与格栅的界面作用阐述了减小沉降差的机理。

To discuss the effects of press-fit surgical technique , implant dimensions and implant thread shapes on the primary stability of immediately loaded implant using the 3-dimensional finite element analysis with the models of the immediately laded implants.

目的：本课题拟建立螺纹型牙种植体即刻负载三维有限元模型，利用即刻负载有限元模型研究种植体挤压就位、种植体长度和直径、种植体不同螺纹形态等因素对即刻负载牙种植体初期稳定性的影响，为临床即刻负载提供理论支撑，以期指导临床工作。

Based on an unstructured grid, finite-volume coastal ocean model, the complete three-dimensional fine-solution equation group of shallow-sea tide is adopted to calculate the tide in Qinzhou Bay. The equation group consists of tide-control equations and obturating turbulence equations.

基于采用不规则三角网格和有限体积方法的FVCOM模式，建立钦州湾三维潮流数值模型来重现钦州湾的潮位和潮流变化状况。

PURPOSE: To study the stresses and movement of central incisor with three-dimensional dynamic finite element method, in order to understand and describe the process of occluding.

目的：采用动态有限元方法模拟前牙咬合过程，分析上、下前牙在功能咬合过程中的运动和受力变化规律，为全程描述前牙生理咬合过程提供理论依据。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。