查询词典 difficulties

Each high school according to the relevant provisions of the state on family economic difficulties students tuitional derate, school grants such assistance policy.

各高中学校要按照国家有关规定对家庭经济困难学生实施学费减免、校内奖助学金等救助政策。

The school will provide free lunch and uniform for Those who are in real financial difficulties, and derate their fee after the application without any questions or investigation.

对于那些经济确实有困难的家庭，只要提出申请，学校还可提供免费午餐、免费校服。学校接到申请后，不会追问，不作调查，当即减免学生的费用。

Descriptive statistics is a tool for describing orclass of problems that present great difficulties for the unaided human mind.

推理统计学是一套已定形了的方法体系，它解决的是光凭人脑极难解决的另一类问题。

All his friends have deserted him when he is in difficulties.

在他困难的时候，他所有的朋友都背弃

All his friends have deserter him when he is in difficulties.

在他困难的时候，他所有的朋友都背

This is one of the difficulties in performing designed experiments.

这是一个困难的表演设计的实验。

Despite the difficulties we have come to me, I will do my best to help all the people.

大家有困难尽管找我，我会尽我所能帮助大家的。

But these difficulties, these differences, should not deter us.

然而，这些困难和差异不应该使我们踌躇不前。

However, it may suffer difficulties in determining the overall stability of the system.

但是，它可能在确定整体系统的稳定性的时候会有困难。

Firstly, according to the difficulties in the optimization of chemical engineering and the intrinsic disadvantage of deterministic optimization algorithms, this work analyzed the importance and advantage of stochastic algorithms, and proposed some important aspects in research on them. Secondly, genetic algorithm was applied to two problems of data driven modeling, one of which was combination problem, the other was mixed integer nonlinear programming. Thirdly, systemic investigations were made on the basic structure, dynamic behavior and modifications of particle swarm optimization. Lastly, two kinds of proposed PSO algorithms were applied on calculation of phase equilibrium, which is nonconvex optimization.

本文首先根据化工优化中存在的困难和确定性优化算法内在的缺点，分析了随机优化算法的重要性，并提出研究随机优化算法应注意的问题；其次，将遗传算法应用于两个数据驱动建模问题，一为组合优化问题，一为混合整数优化问题；再次，从粒子群优化算法的基本结构、运动行为、改进方法做了系统的研究：最后，将提出的两种改进粒子群优化算法应用于相平衡计算问题，为非凸全局优化问题。

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。