查询词典 numerical

When consider-ing the applicability of numerical methods for these systems,it is important to analyzewhether or not numerical methods inherit the dissipativity of the underlying system.

如2维的Navier-Stokes方程、Lorenz方程等许多重要系统都是散逸的。

Numerical simulations were conducted for dropwise condensation on the basement of the random fractal model and the methods are also used in the numerical simulation of nucleate pool boiling heat transfer.

珠状凝结和核态池沸腾换热都具有较高的换热效率，具有很重要的工业应用前景，因此引起了极大的研究兴趣，取得了一定的成就。

Analyzing the process in the paper, the hydromechanics model of the hydromechanical deep drawing is built up, and the method on the numerical simulation of the hydromechanical deep drawing is put forward, which is an effective approach to the numerical simulation.

本文通过对筒形件充液拉深工艺的分析，建立了接近实际的充液拉深流体力学模型。结合有限元数值模拟技术，提出了充液拉深流体压力行为在数值模拟分析中的实现方法，为充液拉深有限元数值模拟提供有效途径。

The computational grid generation is the prime procedure of hydromechanical numerical simulation. The results of generation affect the numerical simulation obviously.

计算格网生成是流体力学数值模拟过程中的一项主要工作，以往普遍采用手工剖分方法，其结果对数值模拟产生很大影响。

By some typical numerical examples , the effects of delamination , hygrothermal and the progressive failure on the stability behaviors of the AGS plate and shell are discussed. The numerical results indicate that the effects of delamination , hygrothermal and progressive failure on the stability of composite AGS structures can not be neglected when the above factors result in a jump of the buckling mode.

通过典型算例讨论了湿热环境、累积失效及分层损伤等因素对复合材料 AGS结构稳定性的影响，数值结果表明当上述因素导致结构的屈曲模式发生突变时，其对 A GS结构稳定性能的影响是不容忽视的。

Different from the imbricated or overlay discrezed numerical technique, an isoparametric map is proposed for the numerical code programming of this nonlocal model.

不同于迭盖离散数值技术，文中设计了实现非局部模型数值编码的等参映射方法。

Incurrent research, aiming at the rupture problem engendered in the shooting process of acertain 5.56mm automatic rifle, the strain and stress distributions on the cartridge caseunder the action of axial pull have been analyzed. Based on the theories of elastic-plasticmechanics and contact mechanics, a mathematic and physical model of the cartridge-caseand chamber system has been set up; and based on the platform of the general softwarepackage APDL of ANSYS for finite element analysis, a parameterized model of thecartridge-case and chamber system has also been established. The method for nonlinearFEA has been adopted to analyze the stress distribution on the entire cartridge-case andchamber system, and the method of contact element has been employed to investigate thecontact stress between the cartridge case and chamber, and then the influences of frictioncoefficient and locking space on the static and dynamic stress and strain response of thecartridge case and chamber to the action of power gas have also been discussed. On thebasis of a lot of numerical tests, a kind of element Plane13, which is concentrated incoupled computation of heat and construction, has been used finally to simulate thetransient response of the cartridge-case and chamber system to the power gas. Throughloading the temporary thermal characteristics of explosive gas in the procedure of emulate, the corresponding transient thermal stress distributed on the entire system under thecombined load of transient thermal stress and transient pressure has been obtained. Owingto these comprehensive considerations, the numerical results obtained in this paperrepresent the actual situations comparatively exactly.

本文针对某5.56mm自动步枪在工作中出现断壳的问题，分析了弹壳在轴向拉力作用下的应力应变；基于弹塑性力学及接触理论，建立了弹壳弹膛系统的数学、物理学模型，在通用有限元ANSYS软件的参数化建模工具APDL平台上，建立了弹壳弹膛系统的参数化模型；采用非线性有限元法计算了弹壳弹膛系统的整体应力，引入接触单元法分析弹壳和弹膛的接触压力，探讨了在不同的摩擦系数和不同的闭锁间隙对弹壳弹膛静、动态响应的影响；本文进行了大量的尝试，最后确定采用热、结构耦合单元Plane13，在计算中加载了火药气体的温度历程，成功的获得了弹壳弹膛系统在瞬态的热载荷和瞬态的压力载荷同时作用下弹壳弹膛系统的热应力数值解，考虑因素全面，比较真实的反映了弹壳弹膛系统在火药气体压力和热载荷下作用的情况。

Study on the Numerical control milling machine tool of the excited states, Know that the total situation is, a interplanting of the numerical control equipment, quantity and student's scale have relatively large contrast. The machine that used can not catch up with the need, As well as other course, Students few can move the cell-phone independently , influence training in fact , result of training seriously.

通过对各种实验型设备的调研，了解到现阶段我国用于实验型设备的数控系统设备的台套种类、数量与学生规模反差较大的现况，设备落后，加之由于各种客观和主观的原因，全国大专院校机电类学生工程实践能力普遍较差，其动手能力与理论更是难结合在一起，严重。。。

Study on the Numerical control milling machine tool of the excited states, Know that the total situation is, a interplanting of the numerical control equipment, quantity and student's scale have relatively large contrast. The machine that used can not catch up with the need, As well as other course, Students few can move the cell-phone independently , influence training in fact , result of training seriously.

通过对各种实验型设备的调研，了解到现阶段我国用于实验型设备的数控系统设备的台套种类、数量与学生规模反差较大的现况，设备落后，加之由于各种客观和主观的原因，全国大专院校机电类学生工程实践能力普遍较差，其动手能力与理论更是难结合在一起，严重影响到实训、培训效果。

In order to verify the validity of the numerical results, the numerical simulation results are compared with Lader's experimental ones.

结果表明计算和试验结果吻合良好，各种工况和配重条件下计算结果相对误差都在15%以内。

If you are committed to an education career, then the Master of Arts in Education from Ashford University is for you.

如果你是致力于教育事业，那么，艺术教育硕士学位阿什福德大学是给你的。

objective:to explore the expression of survivin protein and its mrna in rectal cancer and their clinic significance.

目的：研究凋亡抑制因子survivin蛋白及其mrna在直肠癌组织中的表达及其与临床病理关系。