查询词典 problem

Because this problem is an eigenvalue problem the thesis uses the method of fixing the temperature at one point to solve it.

由于火焰传播问题是特征值问题，本文采用固定燃烧器内某一点温度的方法求解。

In thesis, the generalized symmetric eigenvalue problem can be recasted into an unconstrained optimization problem.

本文先对广义特征分解问题进行建模，将瑞利商优化问题转化为无约束优化问题。

The eigenvalue assignment problem is a classical problem in control systems.

在控制理论领域里，特征值配置问题是一个经典问题。

Stability problem is divided into two sorts.The first one can come down to evaluate eigenvalue problem finally, which is easy to be calcaulated.

第二类稳定问题，因为考虑了几何非线性、材料非线性和初始缺陷的影响，所以计算出的极限承载力更符合工程实际。

For example the problem of microphone, the problem of the interruption with electric current.

例如麦克风的问题，和电流中断的问题。

In this problem, the main difficulty is that the variation of border electric potential is not sensitive to the variation of conductivity in the field. So far, there is not an effective method to solve the problem.

在低频电流场逆问题的计算中，最大的问题在于边界电位值的变化对场域内部电导率的变化不敏感，到目前为此，对此问题还没有一个公认的有效的解决办法。

Current problem is how to develop power market and the problem that manage good electrified wire netting.

目前的问题是如何开拓电力市场和管好电网的问题。

But because of the complexity of this problem itself and the limited research means, it remains a problem in cardiac electrophysiology.

机械活动相关关系研究的复杂性，加上以往缺乏有效的研究手段，所以这一具有重要学术和临床意义的问题的研究成果十分有限。

The problem of concurrent line and collinear point in Elementary Geomettry is a simple problem. However it is very complex and difficult when we use Elementary Geometry theory to solve it.

初等几何中共线点及共点线的问题，本来是个简单的几何问题，然而这个问题运用初等几何方法去解决，有时会觉得非常复杂和困难。。

Within this context, four specific areas are addressed:(1) By means of finite integration technique, a new kind of the first order partial difference equation is derived from the original disperse transmission line equation of the uniform waveguide's. As it is the kind of one dimension Dirichlet's boundary problem, it is convenient for us to solve this equation from the leapfrog scheme. Because computation is carried out in one dimension, both high calculation efficiency and precision have been obtained in this method. Meanwhile, this method provide us a different selection to simulate the transient response of waveguide with non-simplical, for examples cylinder and elliptic waveguide, and avoid solving the second order equation, or using finite difference time domain to simulate a three dimension problem, sometimes the latter precision is not satisfied with the need, or low efficiency.

在这一研究内容下，主要研究四个方面的问题：(1)在完成金属波导传输线方程时域形式的基础之上，应用有限积分技术，把波导特征模式的色散传输线方程，化简为一组新的一阶偏微分方程组，该边值问题属一维Dirichlet边值问题，从而便于用蛙跳格式求解，由于是在一维中计算，该方法具有很高计算效率和精度，从而避免了以往为得到金属波导中特征模的时域响应特性，须要求解二阶方程，或用时域有限差分方法求解三维问题的方法，对于后者来说，计算有时是不准确的，或是很耗时的例如计算诸如圆波导、椭圆波导等其它复杂形状的波导。

Nowadays, most of research are to build a transmutative Petri Nets through adding controlling place sets, controlling arc sets and controlling policy to the basic Petri Nets, while the Controlled Petri Nets could be used to argue many controlling theory problems conveniently and to induce many logically and physically supervisory and solve the Event Feedback Controlling Problems and State Feedback Controlling Problem in DEDS supervisory theory.

目前大多数的研究表现为在变形后的受控Petri网基础上，利用各种方法求得各种逻辑型、结构型控制器，解决DEDS监控理论中的事件反馈控制问题与状态反馈控制问题。

On one hand, there are discussions with the works council and union about extension of short time working up to the end of September.

一方面，有讨论，工程理事会和联盟关于延长工作时间短至9月底。