查询词典 objective function

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。

This thesis builds optimal model which takes the four-cylinder double-acting Stirling engine model as objective function and takes actual conditions as constraints, and use quasi-Newton method and penalty function method to slove this problem.

论文以建立的模型为目标函数、以具体实际情况为约束条件建立了发动机参数最优化模型，应用拟牛顿法和惩罚函数法实现了对最优化模型的求解。

Objective: To discuss the relationship of renal electrical activity and the change of Cardiovascular function, with electrophysiological technology to investigate the effects of rabbit's renal efferent nerve discharge by the altering of Cardiovascular function.

目的 ：应用电生理技术研究心血管活动改变对家兔传出肾神经放电的影响，以探讨肾脏电活动与心血管活动之间的联系。方法：分别给家兔静脉注射肾上腺素、去甲肾上腺素和乙酰胆碱，同步观察心率、动脉血压和肾传出神经放电的变化。

One position control system is introduced as the objective controlled by FOC. Based on Mittag-Leffler function, the fractional order control system with full memory length is adopted as evaluation criterion, and an approximation performance function of discretization methods is proposed. Analyzing the time domain error and approximation performance, the investigation to various discretization methods is carried out comparatively in detail.

引入一个位置控制系统作为分数阶控制对象，将Mittag-Leffler函数的全记忆长度分数阶控制系统作为评估基准，提出了一种离散算法的近似性能函数，通过时域误差分析以及近似性能分析，对比研究了分数阶微积分算子的数字实现方法。

Secondly, a rule of the choice of step-length is presented for a non-quadratic objective function of n variables, according to the rule we prove that the Gradient Method has local n-step quadratic convergence rate for a non-quadratic function under certain conditions.

其次，对于n个变量的非二次目标函数也提出了一个步长选取的准则，并在此准则下证明了当目标函数满足一定的条件时，梯度法具有局部n-步二阶收敛速度。

In this paper, the authors transform the problem of undirected graph drawing to the problem of function optimization, then use genetic algorithms to find approximate optimal solutions of the objective function, and thus obtain a general structure of undirected graph drawing algorithms.

将一般无向图的画图问题转化为函数优化问题，用遗传算法求目标函数的最优解的近似值，从而得到无向图自动画图算法的一个一般框架。

Based on a specific analysis on the strategy and operation of Hedge Fund, this text try to give a just and objective analysis of it from the perspective of micro market function and macro market function, and try to put forward reasonable suggestions of its future development on the basis of analysis on the necessity and possibility of development.

本文试图在详细分析对冲基金策略及运行的基础上，从微观和宏观市场功能的角度对于作为投资手段的对冲基金给出公正、客观和尽量不带感情色彩的阐释与评价，然后分析对冲基金在我国发展的必要性和可能性，并期望提出我国发展利用对冲基金的合理建议，以应对资本市场逐步放开条件下对冲基金的可能出现。

The mathematic model of optimization allocation of tolerance values is established. In the model, the objective function of the optimization is production cost-tolerance function, and the constraints of the optimization are equation and inequation in the fifth chapter.

以加工成本—公差函数为目标函数，以第五章的等式和不等式约束为约束条件，建立了公差大小最优分配的数学模型；基于遗传算法研究了形位公差大小的最优分配方法。

In this paper, by using some characteristic quantities such as value function, trust region radius, etc. in trust region method, we present a global error bound for the distance between a feasible solution and the optimal solution under the condition that the gradient vector of the objective function is strongly monotone.

本文利用信赖域方法中的几个特征量（由预测下降量给出的价值函数与信赖域半径等），在目标函数的梯度向量是强单调的条件下，为约束最优化问题的可行解与最优解之间的距离提供了一个全局误差界。

The objective of this paper is to analyze medical expenses records of a group in a year. The Kernel Density Estimation, a nonparametric method, is used to estimate the density function of natural logarithm of medical expenses amount. Then the estimated density function is used to estimate the means and variances of medical expenses amount spent by the inpatients per time.

本文研究了某团体一年的住院医疗费用记录，运用非参数模型中的核密度估计方法，对每次住院费用对数的分布密度进行了估计，并用它进一步估计了每次住院费用的均值和方差，取得了较好的效果。

Pachomius manual labour was organized as an essential part of the monastic life; and since it is a principle of the monks as distinguished from the mendicants, that the body shall be self-supporting, external work of one sort or another has been an inevitable part of the life ever since.

根据圣pachomius体力劳动组织作为一个重要组成部分寺院生活；以来，这是一个原则的和尚，作为有别于乞丐，该机构应自支撑，对外工作的这种或那种已一个必然的一部分，生活至今。

In order to study the effects of parametrical rolling on the ship movement and tilts, in allusion to ship's navigating in regular following waves, the equation of ship rolling motion is transformed into normal Mathieu equation by proper variable replacement when strong parametrical excitation in restoring moment varied according to sine or cosine wave.

为研究参数横摇对船舶运动和倾覆的影响，通过对船在规则波上随浪航行时，恢复力矩中出现的1个以正余弦规律变化的强参数激励项进行适当的变量置换，将船舶的横摇运动方程转换成标准形式的Mathieu方程。