问题是

Scheduling is an important combinatorial optimization problem.

调度问题是一类重要的组合最优化问题。

Packing problem is a typical combinatorial optimization problem, and has NPC difficulty in solving complexity.

布局问题是一种经典的组合优化问题，在求解复杂性上具有NP完全性。

The maximum flow problem is one of the classical combinatorial optimization problems.

最大流问题是一个经典的组合优化问题。

Due to the constraint of both high current and high speed, it is difficult to commutate for high-speed and high-current DC machine .

1前言 换向问题是直流电机的固有问题，换向过程十分复杂，影响换向的因数很多。

The basic idea of Tikhonov regularization is that linear compact operator equation of the first kind is replaced by the minimization problem of Tikhonov functional, the paper demonstrates the minimization of Tikhonov functional is an well-posed problem. In the end, the paper suggests a new type of iterative algorithm to solve inverse problems of parameter identification for one-dimension parabolic partial differential equation .

本文论证了Tikhonov泛函极小化问题是适定的，即满足西安理工大学硕士学位论文解的存在性、解的唯一性和解连续依赖于数据的稳定性：并且此极小化问题等价丁求解第一类方程的正规方程。

Creating companionate choice problem is dummy company one of establishing level important and decision-making problem, having major effect to the function of dummy company.

制造伙伴选择问题是虚拟企业组建阶段中的一个重要决策问题，对于虚拟企业的性能有着重大的影响。

The third question is of the competency of particular kinds of evidence.

第三个问题是特殊种类的证据的证明力的问题。

Computation partition is one of the most important problems in parallel compilation and optimization.

计算划分问题是并行编译中最为重要的问题之一。

Focus on solutions.专注于解决问题.If you are a complainer, or focus on problems, change your focus now.

如果你是一个爱抱怨的人，或者总是想着问题的人，那么现在改变你的注意力。

It is proved that MADST belongs to NP complete class, thus can not be solved by some polynomial algorithm.

文中证明了MADST问题是NP完全问题，不能用有效的多项式算法求解。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。