查询词典 problem

Design parameter based on finite element model updating is part of an inverse problem of structure dynamics. Features of the structure are used as a function of design parameters. Parameters are updated based on the first derivative. This paper presents a new method which treats the model updating as a positive problem.

设计参数型有限元模型修正属於结构动力学反问题，其理论基础是将结构的特徵量视为设计参数的函数，然后依据特徵量对设计参数的一阶导数信息进行迭代求解。

Diffusion problem of a predator-prey model with Holling typeⅡfunctional capturing function is studied. Stability condition is obtained when diffusion is absent, and the effect on stability of positive equilibrium is studied when diffusion is present. In the end, the problem of existence of limit cycle is proved in the first quadrant when diffusion is absent.

针对一类具有HollingⅡ型功能捕获函数的捕食－食饵模型的扩散问题进行了研究，得到了无扩散时正平衡点的稳定条件，以及扩散存在时对正平衡点稳定性产生的影响，最后证明了无扩散时系统在第一象限存在极限环的问题。

At the same time, the mix fixed point method and the nonsmooth Newton method for finite element method are also presentedBased on the Gauss point method for seepage problem with free surface, the non-smooth equations model for seepage problem is proposed as well as the mix fixed point method which belongs to the fixed mesh method.

本文根据近些年来求解可动边界的经验和非光滑分析的发展，建立了求解渗流自由面的数学模型，提出了求解渗流自由面的有限元混合不动点法和非光滑牛顿法。

For the local flatting problem of cross-section, that can be seemed as a problem of curve girder bending under outside force, is analyzed by FEM, which can not be easily calculated by theoretical method. And there comes to the result that both roller position and initial angel have little influence on cross-section flatting.

对理论计算所不容易解决的管截面局部压塌的问题，用有限元模拟的方法进行了分析，结果表明辊轮位置和初始弯曲角对管截面扁化的影响较小。

When researching the equilibrium problem under open economy, Mundell and Flemming expand the IS—LM model, provide a powerful tool for researching this problem.

蒙代尔和弗莱明在研究开放经济条件下的内外均衡问题时，对IS—LM模型进行了扩展，为研究开放经济条件下的财政政策与货币政策效用问题提供了强大的工具。

According to he reality of the world development and the flinty condition, this paper brings forward some problem of Chinese bank, and the author find the root of the problem.

本文首先从资产的理论概述着手，阐述了资产以及资产重组的定义以及一些外延的知识背景，作者结合理论和一些资料知识，概述了银行业资产重组的原因。

The company suffered from cash flow problem or staff problem.

公司受现金流动问题或职工问题的困扰。

Flexible flow shop scheduling problem is a complex job shop scheduling problem.

柔性流水作业排序问题是一类复杂的车间作业调度问题。

In this paper, GA is applied to solve complex shop floor scheduling problem. I have made some research in the following aspects:(1) In order to overcome the weakness of premature convergence appearing in GA, an improved genetic algorithm is proposed and applied in the flow shop scheduling problem.

本文应用遗传算法求解复杂的车间调度问题，主要在以下几个方面作了一些研究工作：(1)为了克服遗传算法容易出现提早收敛的缺陷，提出了一种改进的遗传算法，并将其应用于流水车间调度问题。

No-wait flow shop problem is one of flow shop problems, and is a typically NP-complete problem, which means that it is impossible to find the global optimum in polynomial complexity.

无等待问题是流水车间调度中的一种，是一类典型的NP完全问题，已被证明在多项式时间内得不到最优值。

However it can often be frust ating for a child when people are unable to pronounce their name.

但它往往可以令人沮丧的一个孩子当人们无法断言他们的名字。

All these compounds were obtained from this genus for the first time. Compound, 4-cumylphenol, was a new nature product.

所有化合物均为首次从本属海藻中分离得到，其中4cumylphenol为新天然产物。