目标函数

The positions and functions of the inventory control in the environment of supply chain are discussed first. The analysis on main conflict problems needed to be determined is presented. Based on the algebraic Petri nets the modeling research on vender managed inventory is proceeded on. Considering the shortages of the original algorithms, the improvements are putout to speed up the search process and improve the precision of the search results. The optimizations of lots sizing problem with the objective function of inventory costs are processed by the improved optimal algorithms. By the analysis on the results of the optimization, the conditions of overtime work, out of stock, and security stock are achieved.

文章首先讨论了供应链环境下库存控制在物流管理中的地位和作用，分析了库存控制需要解决的主要矛盾；然后应用代数Petri网对供应商管理库存(Vender Managed Inventory，VMI)的模式进行了建模研究；针对原始的粒子群优化算法和遗传算法存在的不足，分别提出了改进型算法，提高搜索速度和搜索精度；运用改进的优化算法对以库存成本为目标函数的批量计划问题进行了优化，通过优化结果的分析，得出了批量生产计划安排中加班、缺货和安全库存的存在条件。

Since the method makes joint optimization to the the number of transmission sublayers and the protection level according to the feedback parameter, it can be more adaptive to the channel situation and can obtain higher performance compared with MDFEC method proposed by Puri, which design the object functions and perfoms optimization according to the fixed channel situation.

同时由于该方法根据反馈的出错分组数进行传输子层数和纠错强度的联合优化，与Puri等人提出的按照确定信道条件设计目标函数进行优化的MDFEC方法相比，更能够适应信道条件的变化，从而获得更高的性能。

The inverse problem is solved using conjugate gradient method of minimization based on discrete ordinates method of radiative transfer equation.

该方法是在辐射传递方程离散坐标近似的基础上，用求目标函数极小值的共轭梯度法进行反演计算。

The objectives are the subsonic and supersonic zero-lift drag coefficients, the maximum lift-drag ratio, the maximum lift coefficient at low speed, the average and maximum value of forward and sideway RCS.

目标函数取为亚音速及超音速时的零升阻力系数、最大升阻比，低速时的最大升力系数，以及飞机前向、侧向的RCS平均值、最大值。

However, the quasi-human method can give us good strategies for jumping out of a trap of local minimum with the help of human beings\' behavior and experiences.A new 3-dimensional real Euclid model is proposed for the protein structure prediction problem. Then a quasi-physical method based on corresponding physical model is presented to solve the relevant mathematical problem.

拟物方法将原始问题落实为优化问题，而在用数学方法求解优化问题时，常常会碰到计算落入目标函数局部极小值陷阱的困境，如何从这种困境中逃逸出来，使得计算奔向前景更好的区域，拟物方法则无能为力，而应用拟人方法则可以设计出好的&跳出陷阱&的策略。

Based on the theory of wind energy, this paper derives the equations for sitechoosing of wind power plant and optimum selection of windmill from two different points of view.

本文根据风力发电的基本理论，从风能利用和发电成本两个角度出发，推导出风力发电站选址与风力发电机选型的目标函数。

Optimization method is applied to the layout design of mechanisms on trolley in order to maintain an even distribution of optimization design on an example a trolley with given wheel base and track gauge ,using even distribution of wheel loads as an objective funtion and condition of a signle hook lifting trolley as restrictive condition

桥式起重机的大车设有起升机构和小车运行机构，为使小车轮压呈均匀分布，应对大车的机构布置进行优化设计，以知大车轨迹和轴矩为例，以车轮轮压均匀分配为目标函数，按单钩起重大车的条件提出约束条件，对优化设计的结果进行分析如下

Based on the reservoir engineering theory of horizontal well,the objective functions ofNPPandSNPVfor integrative evaluating water-free production of horizontal well were derived and established.

根据水平井油藏工程理论，推导并建立了综合评价水平井无水期合理产能的2个目标函数，提出了底水油藏水平井无水期合理产能的计算模型，并以塔中4油田水平井为例进行了分析验证，结果表明该方法简单实用。

The constraints of the missile flying with SAR at the flight time are built, and the missile command acceleration is used as control variables to set up the objective function about the dwell time and the desired azimuth resolution. The control variables are optimized using the genetic algorithm, and an optimal trajectory is gotten.

首先建立了弹载SAR条件下导弹飞行的约束，然后以导弹指令加速度为优化变量，构造了与方位分辨率和波束驻留时间相关的目标函数，采用遗传算法进行寻优，设计得到了弹载SAR平台的优化弹道。

The results show that the three-effect concurrent distillation is the best separation technology in response to the objective function of the ratio of multi-effect distillation expenditures to mono-column expenditures.

并以多效精馏与单塔精馏总费用的相对值最低为目标函数，确定分离甲醇－水体系的最佳方案为三效顺流精馏工艺。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。