查询词典 optimization

Much work has been done on multi-objective optimization methods to make them turn from deterministic searching algorithm to stochastic searching one, and from single objective optimizing method in nature to veritably vector optimization method. At present there are still many unsolved problems on it.

摘 要 多目标优化方法经历了一个从确定性搜索算法到随机搜索算法的过程，本质上仍是单目标优化的目标组合方法到真正意义上的向量优化方法的过程，至今仍在不断地发展中，但仍有大量未解决的问题。

The aim of the optimization is to obtain minimum structure, the smartness of the machine and the max velocity and acceleration of the actuators were taken into account in optimization.(4) The inverse and forward static models of the machine were established by using virtual displacement principle.

提出了基于机床加工空间的机构参数优化方法，该法以所得并联机构的结构较小为目标，同时兼顾机构的灵巧性以及驱动关节的最大驱动速度和最大驱动加速度。

The method to determine the limited temperature for dry/wet running conditions was presented. Multi-object frame optimization model were developed. Combined with the thermal and hydraulic correlations for dry/wet conditions of plate wet air cooler, the optimization model can be used to optimize the dry/wet limited temperature and frame parameters.

提出了湿式空冷器干湿工况运行界限温度的确定方法，建立了板式湿式空冷器多目标结构优化模型，结合实验得到的干湿工况下板束内外侧阻力、传热传质关联式以及喷淋水膜对流换热关联式，该优化模型可用于干湿工况运行界限温度与结构参数的优化。

Finally a comparison of optimization results between complex method and genetic algorithm is carried out, which shows the value of objective function ha s decreased 6.6% under GA. This will help decrease the slippage of steering whee l and wear extent of tyre. At the same time, it also verifies the feasibility an d superiority of genetic algorithm in solving the nonlinear optimization problem s with many restraints and variables.

计算结果表明：与复合形法相比，遗传算法使目标函数值减少了6.6%，取得了较好的优化效果，从而更有利于减小转向车轮的滑移量和轮胎的磨损量，同时也验证了遗传算法解决多约束、多变量类型优化问题的可行性和优越性。

On the base, integrated development environment of VB is used to develop software of simulation and optimization of AHT cycle system. After the software ASS is developed, it is applied to an industrial instance, including process simulation, thermal analysis and specific heating load optimization.

在此基础上，利用VB集成开发环境，展开了AHT吸收循环系统模拟优化软件的开发工作，并开发出软件ASS，实现了过程模拟优化计算，包括：过程模拟、热力学分析和比供热率优化等计算模块。

According to the shortage of traditional single-objective optimization, the thesis proposes to use amendatory objective function parameters optimization.

针对传统的单目标优化的弊端，提出采用修正的目标函数参数优选法。

A simulation-based model is applied to describing the phased-mission system with multi-repairer. Algorithms for calculation of the optimization quantity of spare parts are provided. To examine the applicability of the method, some examples are presented in this paper. Finally, the optimization quantity of spare parts following exponential distribution are calculated with both this method and analysable method.

近年来，许多学者在这方面进行研究，如文献[1]介绍了单阶段任务条件下部件寿命服从指数分布的备件携行量计算方法；文献[2]给出了其它几种特殊分布的计算方法，但都是针对单阶段任务条件下部件不可修情况的；文献[3]给出了一种基于BDD的多阶段任务备件携行量计算方法，但仍是仅研究了指数分布、且任务期间部件不可修的情况。

The paper is mainly on the process control of NPP management from the view of proprietor, so it is of great pertinence for it involves the process controlling system, checking methods for the schedule, adjustment and optimization as well as various factors and analysis that influence the overall process. Meanwhile, the paper summarizes more practical checking and comparative methods as well as the application of software from the project management instead of discoursing on the adjustment for the original schedule from the angle of confusing network optimization, it is in this unique style that the research is naturally of more practical and appliable significance for the management of process control in nuclear plant.

本文主要从业主方面研究核电站项目管理的进度控制，从扩建工程的进度控制体系，进度计划的检查方法、计划的优化与调整，影响进度的各种原因及分析，并采取的有效措施，因而本文具有鲜明的针对性；本文未从复杂的网络优化的角度去论述对原进度计划进行调整，而是总结了项目管理中应用较多的检查、比较方法及项目管理软件的应用，从而使得本文的研究具有较强的可操作性，和实际应用意义。

In this paper, the sorting of wear, the mechanics of wear particle formed and the characteristics of wear particles are introduced, and morphology characteristics parameter of wear particle are determined, which is particle brim digital feature. Based on image characters, after pre-process, section and extracting of contour parameter of wear particle using image process technique, four shape character parameters are extracted by fourier series expansion. After analyzing fundamental principle and shortcomings of neural network, current BP algorithm is improved in output optimization, network linearization implication optimization and adding momentum, and then astringe speed of BP algorithm.

本文介绍了磨损的分类以及磨粒的生成机理、磨粒的形态特征，应用摩擦学系统分析的观点，确定磨粒边缘数字特征为磨粒的识别特征参数；根据磨粒图像的特征，利用计算机图像处理技术对磨粒图像进行预处理、分割、轮廓参数的提取，采用傅立叶级数展开式提取磨粒四个形状特征参数：圆形度、散射度、凹度、细长度；针对 BP(Back-Propagation)神经网络收敛速度慢的特点，对现行的 BP 算法进行改进，并通过实验验证改进后的网络收敛速度快；研究设计了磨粒图像采集系统；利用 BP 算法建立磨损磨粒自动识别算法模型 AWPRM(Auto Wear Particle Recognition Model)。

An optimization calculation was carried out on beneficiation capacity planning of a certain mine enterprise by the particle swarm optimization algorithm.

因此对于这类问题，传统的优化理论和方法在建立系统的数学模型时比较困难，且不准确。

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。