目标函数

This article, based on analysing the objective function of cutting variables optimization, assigns the minimum cost of the machining process and the minimum relative wear of, the cutting tool as the optimum objective function.

本文在分析切削用量优化目标函数的基础上，选取最低工序成本和最小刀具相对磨损作为优化的目标函数。

The PID parameter tuning of non-linear control system is set as the engineering background. The aim is the optimal design of PID parameter. On the basis of the design and research of the advanced PID parameter tuning, the mathematical model-transfer functionis developed through correlation analysis on statistical method.And with the optimization algorithm under constraint condition, the non-linear, Isqnonlin is set as object function. Then with connection of the non-linear constrain optimization algorithm and simulink technique, a set of adjust parameters which fit the performance index of the control system are found. And optimization design process and steps are provided.

本文以非线性控制系统PID参数整定为工程背景，以PID参数的优化设计为目标，在分析和研究国内外PID参数先进整定方法的基础上，运用相关分析实验统计方法建立对象的数学模型——传递函数，把PID参数设计问题转化为一种非线性优化设计问题，借助于约束条件下的优化算法，以非线性最小平方指标为目标函数，将非线性约束优化算法同Simulink仿真技术相结合，找出符合控制系统品质指标的一组调节参数。

An objective function was proposed to evaluate the minimum zone cylindricity error. The error model was optimized by genetic algorithm.

建立了圆柱度误差最小区域评定的目标函数，并利用遗传算法对目标函数进行寻优。

In this paper, a Multiple Ant Colony based Routing Algorithm is proposed for routing optimization designing, in which the communication messages sent by nodes for searching the optimal route are treated as ants with limited life-span. Through the ants' movement and Populations' cooperation, the main routing path and multiple candidate routing paths can be distributedly obtained.

提出了一种基于多蚁群无线传感器网络路由算法，采用多种群并行搜索，并在种群中采用基于目标函数值得启发式信息素分配策略和根据目标函数自动调整蚂蚁搜索路径，利用蚁群的分布式特点，通过有限寿命蚂蚁的协作在源节点与目的节点之间的运动获取主路径和备选路径，然后根据节点信息适时更新路由表。

On the basis of engine idiocratic mathematical model, using the origin underway accelerate time and the oil consumption at the cycle of multi-working conditions as the objective functions of the power performance and the economy performance respectively, and then transform it to a single objective function by using the linear adding.

在建立发动机特性数学模型的基础上，以原地起步连续换档加速时间和多工况循环使用油耗作为衡量动力性和燃油经济的2个分目标，采用线性加权组合的方法将其转换成单一目标函数，建立了汽车动力传动系优化数学模型，利用惩罚函数法对此模型进行了优化，实例计算表明，应用该方法对汽车动力传动系进行优化匹配分析时，整车综合性能均有显著改善。

There exits several MDO algorithms. But they are in our opinion either nonefficient or complicated. So we devised an algorithm called Subspace Approximation Optimization . In the SAO algorithm, the whole system is decomposed into one system-level optimization and several disciplinary optimizations so that a large and complicated problem can be divided into several easy-solving sub-problems. The coupling relationships and the coordination among disciplines are presented by equality constraints and these equality constraints are assigned to relevant disciplines. The optimums of design variables in system level optimization are transferred to discipline level optimization. The optimums of design variables in discipline level correspond to the point that is the nearest to the optimums of design variables in system level. If the optimums of design variables in system level are out of feasible region of discipline 1eve1, linear constraints can be built in the system level optimization using the design variable optimums obtained by the discipline level optimization. The system level optimization would improve the design of the whole system with these linear constraints.

目前，国内外已经发展出了多种飞机多学科设计优化算法，本文的重点是针对协同优化算法的不足，提出了子空间近似优化算法(Subspace ApproximatingOptimization，SAO)，SAO算法中，整个系统的优化问题被分解成一个系统级优化和若干学科级优化，而各个学科之间的耦合与权衡关系则被当作等式约束，这些等式约束将被分配到各个学科级优化中去，系统级优化的任务是寻找整个系统的最优解，而学科级优化的目标函数是以系统级优化分配下来的设计点为圆心的超球半径的平方，因此，如果系统级优化分配下来的设计点在学科级优化可行域内，则学科级优化目标函数为0，反之，则学科级优化的最优点是系统级优化当前设计点距离可行域最近的点。

The strong and weak points as well as the scope of application of the modeling method based on the target function for the optimization WOB model are summarized.

以综合钻井成本最低为准则，建立了钻井成本目标函数，讨论了影响钻井成本的因素，给出了钻压优化模型的约束条件，在以上基础上建立了钻压优化模型，并给出了钻压优化模型在线实时求解过程中有关参数的确定方法，最后总结了基于目标函数钻压优化模型建模方法优缺点和适用范围。

Referring to regular cuboids, two different performance functions are presented for irregular enclosures in this paper. The optimum voltages applied on PZT patches for active noise control are obtained by minimizing two performance functions.

参考长方体封闭空间的情况，本文在不规则封闭空间的有源消声中提出了两种控制目标函数，通过使控制目标函数最小化得到了有源消声控制电压的最优值。

New factorized quasi-Newton equation not only uses the gradient information of the objection function ,but also uses the function information .

本文利用二次函数近似梯度的方法构造新分解拟牛顿方程，不仅利用到了目标函数的梯度信息，而且用到了目标函数值的信息，比传统的分解拟牛顿方程具有更高的二阶曲率逼近。

Then the combined cycle with the same gas turbine systemfuelled by coke oven gas was simulated by this method, and steam parameters ofdifferent steam cycle modes were optimized by thermodynamic method, pursuingthe target function of the maximization of combined cycle efficiency;based on foreoptimized results, using the thermoeconomic method of matrix pattern, the mode ofsteam system and the pinch point temperature difference under the optimal modewere optimized, pursuing the target function of the minimization of generating cost,and thereby the optimal mode of combined cycle fuelled coke oven gas wasobtained.

将此方法应用于燃气轮机系统设备不变时的燃用焦炉煤气的情况，并以联合循环效率最大为目标函数，对不同蒸汽循环方式时的蒸汽参数进行了热力学优化；在此基础上，利用矩阵模式热经济学法，以联合循环最小发电成本为目标函数，对蒸汽循环方式及最佳蒸汽循环方式下的节点温差进行了优化，从而初步得到了燃用焦炉煤气联合循环的最佳形式。

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。