查询词典 three-body problem

If the problem isn't obviously "interesting" it might be better to put motivation first; but if your work is incremental progress on a problem that is widely recognized as important, then it is probably better to put the problem statement first to indicate which piece of the larger problem you are breaking off to work on.

问题不显而易见"有趣"它可以适宜首先放动力；但是如果你的工作是在被广泛地承认为重要的一个问题上的增加的发展，然后首先放问题陈述表明你正停止着手做的更大的问题中的哪片或许是好的。

Quadratic assignment problem is a NP-hard combinatorial optimization problem and has been applied in various fields. There are always many zero elements in the flow matrix or distance matrix of the quadratic assignment problem instances which are abstracted from the practical problems. Much computation time can be saved if we can first reduce the size of the problem by using its zero elements.

二次分配问题(quadratic assignment problem， QAP)是应用于诸多领域的组合优化NP-难题，许多从实际问题中抽象出来的二次分配问题，其流矩阵与距离矩阵中存在大量零元素，如果在该类二次分配问题的求解中，能够充分利用这些零元素的信息，将大大缩减问题的规模，节省大量运算时间。

According to two logical judgements, the relation of the semi-infinite plane strain problem and semi-infinite spatial problem is found through analyzing the classical answer of wedge, semi-infinite plane, cone and semi-infinite spatial etc. The Flament answer of semi-infinite plane strain problem and the Boussinesq answer of semi-infinite spatial problem are confinable from the relation.

根据两个合理的判断依据，对弹性力学中的楔形体、半平面体、圆锥体和半空间体等经典解答进行了比较分析，发现了半无限平面应变问题和半空间体问题解答之间的关系；通过对解答之间的关系进行研究分析指出，弹性力学中的半无限平面体的符拉芒解答和半空间体的布希涅斯克解答存在局限性。

As a focus like water problem,there are an inadaptable problem between water problem and the four subsystems followed above,which bring in a serious problem of sustainable system.

以水资源问题为焦点，河西走廊发生了人口、环境、经济发展与水资源关系的失调，造成严重的&可持续发展问题&。

This paper also gives a numeral model of LCS problem by using string-coding function, and proves that the LCS problem can be treated as so_called Tomograph problem and be solved with algorithms and hardware suitable for Tomograph problem.

本文提出与LCS问题和一阶Unification问题对应的两种格代数系统，并用项图描述Unification问题，从而构造得到这两种格代数系统之间的同态，使得用求解LCS的算法和硬件求解一类Unification问题成为可能，给出基于LCS硬件的Unification求解器的原理方案。

In this paper, a moving-boundary problem occurring under the acidifying was discussed, which was transformed into a coupled problem of an initial-boundary value problem of nonlinear parabolic equation and an initial value problem of differential equation.

建立了油气层酸化过程中的动边界模型，经Landau变换后，将所求问题转化为定边界上的非线性抛物型方程初边值问题和常微方程的初值问题的耦合问题，并给出了耦合问题的全离散格式。

The design of Design of Learning Activity are consisted of putting forward problem context, anglicizing problem, resolving problem and submit , evaluation of scheme to resolve problem.

学习活动的设计主要包括问题情境的提出、问题的分析、问题的解决以及问题解决方案的提交和评价。

These theories respectively are the governing theory, liability-control theory and trust-deputize theory. The reason why we choose these theory to analyses the problem of incorruptible style supervision system construction of China customs is that the China customs, in theory, ignored the governing of bureaucracy, incompatible the liability-control, and the problem of asymmetry information. Because of the problem of concerning above, in reality, China customs should be appear the problem like feebleness of power of uprightness lead, weakness of superior supervision, catabolizing of polity power, the emptiness of same grade supervision, and failure of incorruptible supervision.

本文认为从这些理论视角出发，我国海关在理论上正是由于不重视科层之间的治理，责任控制无法相互对应，和委托代理产生的信息不对称的问题，而在实践中必然出现现行廉政监督机制的制度缺陷：垂直领导体制下的集权弱化，上级监督&虚监&问题；监督组织政治权威的异化，同级监督&弱监&问题；基层单位高度集权体制下的监督虚化，内部监督&漏监&问题；惩罚失当使腐败收益上升成本降低，廉政监督&失灵&问题等四个方面的弊端。

The other problem in the dissertation reveals that the RBF centers and widths can be evoked by a cooperative-competitive genetic algorithm. Using the well-known credit apportionment problem and niching problem, the different fitness measures in the GA of RBF representation have been studied and the adaptive genetic operators have been given to trade off the problems because of the fitness measure problem.

另外，研究了一种基于全局搜索的遗传算法的带有不同尺度的RBF结构确定的方法，讨论了信度分配问题和小生境问题两个概念，并把两概念应用于基于GA的RBF表示的系统模型中，详细论述了在GA优化过程中，取不同评价函数测量形式，对搜索群体性能的影响，最后提出采用自适应的遗传操作算子来平衡由于评价函数所造成的抑制过度竞争出现早熟问题的方法。

The problems in many applied domains often can be formulated as a nonlinear inverse problem, for example, parameter identification problem, inverse scatting problem, inverse Sturm-Liouville problem and the first nonlinear Fredholm equation, etc..

许多实际应用领域常归结为非线性反问题的求解，比如说参数识别问题，反散射问题，逆Sturm-Liouville问题以及非线性第一类Fredholm方程的求解问题等。

In the days of sailing vessels the crew were afraid they would be becalmed on the ocean.

在使用帆船的时代，船员们担心他们会因为无风而无法在海洋上航行。

As long as foreign donors pay the PA's salary bill, few expect a new intifada.

只要外国继续为巴权力机构的薪水买单，希望发动新暴动的人便寥寥无几。