查询词典 local minimum

The reason of low system efficiency of the mechanical lifting is: unavailable match between transformer and asynchronous motor with large capacity of equipment and large self-consumption; large average no load less of Y series electrical machinery (31.4% of the total oilfield electrical machinery) with 2.86kw; limited adjustable extent of stroke of the electrical machinery in low-liquid produced wells with minimum value of 4 times per minute for limitation of minimum rotation of the electrical machinery and minimum arc of contact of pulley. Energy consumption will be waste for 1 to 1.5 times per minute is enough.

分析显示，造成抽油机系统效率低的原因主要是：变压器与异步电动机之间匹配方式不合理，设备容量大，自身损耗大；占油田电机总量31.4%的Y系列电机的平均空载损耗大，为2.86kW；低产液井电机的冲次可调范围有限，受电机最低转度和皮带轮最小包角限制，其最小冲次仅可调到4次／min，但1~1.5次／min的冲次即可满足生产需要，造成能耗浪费。

According to this understanding, this thesis tries to modify PSO algorithm in order to improve its quality of solutions. The main approches include: using uniform design to ensure the uniform distribution of initial particles in the design space; adding mutation operation to increase the diversity of particles; decreasing the maximum velocity limitation and the velocity inertia automatically to balance the local and the global search efforts; developing a new approach to treat the design variables exceeding the bounds; using extensive local searches to escape local minimum. The overall effect of these approaches can yield better results for most test problems.

有鉴於此，本文针对粒子群演化法之流程参考相关文献并稍作改变，使得粒子群演算法在结果的收敛上更具优势，本文的主要改进的方法包括：应用均匀设计的概念使得初始的粒子可以更均匀地分布在空间上；利用突变增加粒子之间的差异性与多样性；利用适当控制的最大速度限制及惯性权重控制，达到区域搜寻与全域搜寻的效果；应用新的边界处理机制处理设计变数超过上、下限的问题；利用区域强化搜寻针对粒子附近地区，再作进一步的搜索以得到更佳之结果；将各种方法综合后配合粒子群演算法使用，可以得到不错的结果。

Meanwhile, the experiments show that the multi-level swarm intelligence refinement algorithm is better than the multi-level tabu search refinement algorithm, especially in view of the probability that the approximate global minimum partition of the coarser graph may be the local minimum partition of the finer graph. Furthermore, the experiments show that the multi-level ant colony optimization refinement algorithm achieves more performance improvement than the multi-level particle swarm optimization refinement algorithm, using the gain of vertex more effectively.

实验数据反映出，针对最小图上的全局最优剖分可能是初始图的局部最优剖分、粗化图上的全局最优剖分可能是细化图的局部最优剖分的情况，基于群智能的多水平迁移优化算法相比基于禁忌搜索的多水平迁移优化算具备更强的逃离局部最优的能力；基于蚁群的多水平迁移优化算法相比基于微粒群的多水平迁移优化算法，对收益值的启发信息更为有效地利用，取得最佳的性能改进。

By means of the projection method,adding a small disturbing function to the objective function, the penalty method, andthe gradient method, this dissertation proposes several neural networks for solvingsaddle point problems and minimum radius of ball-coverings problems, and investi-gates the stability of the proposed networks by the LaSalle invariance principle andthe Lyapunov method, so as to design neural networks which avoid getting stuck inthe local minimum.

本文针对约束鞍点问题和球覆盖最小半径的计算问题，分别利用投影法、对目标函数加上很小"扰动函数"的逼近法、罚函数法和梯度法等建立神经网络模型进行求解，并基于LaSalle不变集原理和Lyapunov直接法等工具，对模型的动态特性进行研究，从而设计出避免陷入局部极小的优化计算神经网络模型。

At last, a method of gradient descent by advanced step to get the local minimum is formulated and some good jumping strategy to get the integral minimum are also given out.

分别对蛋白质初始格局的选取、局部最优格局的计算、跳坑策略这三方面进行了深入研究。

Meanwhile, the experiments show that the approximate global minimum partition of the coarsest graph may be the local minimum partition of the finest graph and we need to strengthen the global search ability of refinement algorithm in the refinement phase.

同时实验数据也反映了在最小图上的全局近似最优剖分可能是初始图的局部最优剖分，需要加强多水平优化阶段的迁移优化算法逃离局部最优的能力。

Our investigation confirmed that all workers earn at least the local minimum wage, and our sample audit of payroll records showed that more than half were earning above minimum wage.

薪酬 调查小组证实，所有工人的工资均达到当地最低工资标准，调查组查阅的工资记录显示，至少一半工人的收入超过了最低标准。

Our investigation confirmed that all workers earn at least the local minimum wage, and our sample audit of payroll records showed that more than half were earning above minimum wage.

薪酬 调查小组证实，所有工人的工资均达到当地最低工资标准，调查组查阅的工资记录显示，超过一半工人的收入甚至超过最低标准。

There are three aspects for value orientation of social service of local universities: strengthening and invigorating themselves by scientific research as the mainstream to lay the cornerstone for the existence of local universities; cultivating talents as a support and rejuvenating themselves by their features to break through the bottle neck of the development of local universities; serving the local area as the standpoint to gradually face the whole nation.

地方高校服务社会的价值取向有三，其一是以教学强校为主体，突出科研兴校，奠定地方高校自身生存的基石；其二是以人才培养为支撑，突出特色兴校，打开地方高校自身发展的瓶颈；其三是以服务地方为立足点，逐步面向全国，发挥地区高校向外辐射的功能。

Because of the extensive range and large quantity, local administrative organs are in a very important position in the system of governments in our country. Besides, the logistic management system of local administrative organs is an important component of the local administrative management system, which is an important guarantee of the smooth function of local governments' activities.

地方行政机关在我国的政府系统中由于范围广泛、数量巨大而处于一个非常重要的地位，而地方行政机关后勤管理体制是地方行政管理体制的重要组成部分，是地方政府职能活动顺利进行的重要保障。

Article 144 The Government of the Hong Kong Special Administrative Region shall maintain the policy previously practised in Hong Kong in respect of subventions for non-governmental organizations in fields such as education, medicine and health, culture, art, recreation, sports, social welfare and social

第一百四十四条香港特别行政区政府保持原在香港实行的对教育、医疗卫生、文化、艺术、康乐、体育、社会福利、社会工作等方面的民间团体机构的资助政策。原在香港各资助机构任职的人员均可根据原有制度继续受聘。

Small wonder, then, that the Chinese spend more in the shop than any other group of foreign visitors do .

这样的小惊喜，使中国顾客比任何国家的人消费得更多。