查询词典 optimization problem

A boundary identification problem, i.e., inverse geometry problem of two-dimensional heat conduction was solved by using boundary element method and conjugate gradient method-based inverse algorithm.

采用基于边界元法和共轭梯度法的反演算法求解二维导热边界识别问题，即几何反问题。

The problem remains NP-complete even if all expressions are written in conjunctive normal form with 3 variables per clause (3-CNF), yielding the 3SAT problem.

问题依然存在NP完全问题，即使所有的表现形式是书面的合取范式与3个变量为第（ 3合），收益率的3SAT问题。

Study on the psychology and mental salvation of the urban vulnerable groups can help them know their problem that they are faced. It can help them take scientific and rational attitude to treat temporarily inextricable phenomenon and unable conquerable problem. It cannot bring on panic psychology. It can meet peoples deep level mental demand.

对城市弱势群体心态和心理救助进行研究，它有利于帮助人们正确认识所面临的问题，对暂时无法解决的现象或者自己无法克服的问题采取比较科学和理性的态度，不至于出现心理恐慌，同时得到更深层次的心理需求。

Solving the consistency problem In order to realize group work application system, how to control the operation to multi-copied data without destroying the consistency is a very important problem.

解决一致性问题为了实现群体工作应用系统，如何控制对多拷贝数据的访问而不破坏数据一致性是一个非常重要的问题。

Based on the idea and method of problem frame,consistency of viewpoints,integrated manner and integrated process of viewpoints are analyzed and discussed,and a method of integration of viewpoints based on problem frame is proposed.

基于问题框架的思想和方法，该文讨论了视点的一致性、集成方式、集成过程等，提出了一种基于问题框架的视点集成方法。

One way to look at this problem is as a resource constrained project scheduling problem.

研究这类问题的一种方式是资源项目约束的排定问题。

We are left with at least two residual issues: the problem of "broad" contextually determined states of mind, and the qualia problem.

我们还有至少两个留下的问题："宽"语境决定的心灵事态，还有感受质的问题。

In this paper,at first we transformed the nonlinear elliptic system of 2m first order equations into the complex form, then by use the results on the Riemann-Hilbert problem for nonlinear elliptic complex equation of first order, the method of continuity, the Schauder fixed-point theorem and the Leray-Schauder theorem, we proved that the modified Riemann-Hilbert boundary value problem for the complex system with some conditions is solvable.

本文先将较一般的多个未知函数的一阶椭圆型实方程组化为复方程组，然后讨论这些复方程组在某些条件下的一些边值问题的可解性。这里所考虑的方程组既包含线性的，也包含非线性的，比广义超解析函数所满足的方程组还要广，又本文主要研究较一般的Riemann-Hilbert边值问题，先给出这种边值问题解的先验估计式，然后用参数开拓法及Leray-Schauder定理证明这种边值问题的可解性结果。

We firstly look back thebirth of SD method,and then present the SD scheme presented by Johnson et.al.forlinear problem to explain the basic idea and implementation:At step 1,we change the testfunctionwhere(1,β)t is the streamline or character direction decidedby hyperbolic operator of the continuous problem,therefore the SD method belongs tothe Petrov-Galerkin method;At step 2,we adopt time-space finite element space,whoseelement is only continuous in space variables x but discontinuous in time variable t.

首先回顾了SD方法的产生过程，然后以线性问题为模型，描述了SD方法的基本思想和具体实现：第一步，将标准有限元方法的检验函数ν改成其中(1，β)t是连续问题的双曲算子部分所确定的流线方向。换言之，SD方法是一种Peterov-Galerkin有限元方法；第二步，采用时空有限元空间，其元素关于空间变量x是连续的，但关于时间变量t仅分段连续。

Take the method of "subarea" and "conjunction" to segment the whole request model to three parts. Making use of boundary continuousness between medium and lining structure at stress and displacement, construct a wave function that can satisfy the stress boundary condition at horizontal surface by the scattering of SH-waves in circular part. And then, availing of the wave function, conjoin the circular part into the semi-circular hollow space at common boundary. The problem can be reduced to solve the question that can only meet the condition of "conjunction". Finally, the solution of the problem can be summarized to a series of algebraic equations and solved numerically by truncating the finite terms of the infinite algebraic equations.

采用"分区"与"契合"的方法，将整个求解区域分割成三部分，利用介质与衬砌结构在边界上的应力、位移的连续性，构造一个可以自动满足水平界面上应力边界条件的圆域对SH波散射的波函数；再利用这一波函数将圆域与半圆形凹陷半空间的"公共边界"进行"契合"，将问题简化成对一个只需满足'契合'边界条件的散射问题的求解；最终归结为对一组无穷代数方程组的求解问题，利用截断有限项的方法对其进行计算。

Salt is good, but if the salt becomes flat and tasteless, with what do you season it?

14：33 盐本是好的，盐若失了味，可用什么叫它再咸呢？

He reiterated that the PLA is an army of the people under the leadership of the Communist Party of China.

他重申，人民解放军是在中国共产党领导下的人民军队。