查询词典 discrete optimization

SUI Yunkang, different filter functions of element weight, element allowable stress and element stiffness are introduced to change the 0-1 type discrete topological variables to continuous topological variables between 0 and 1, thus a topological optimization model with continuous topological variables is built.

删除无效约束技术就是在近似射线步以后，根据一定的准则，将约束分为无效约束和有效约束，删除无效约束，保留有效约束，减小优化模型的规模，提高求解效率。

The discussion covers: 1、By theoretical analysis on the measurement circuit of the piezoelectric accelerometer, a optimization design for charge amplifier is proposed which uses TL081 to replace a largenumber of discrete components. The design not only improve the integration of the circuit, but also have some extra merits, including smaller volume, lower consumption, less autoeciousness and stronger resistance to interruption. 2、Affiliated conditional circuit and filter to the devised charge amplifier, the signal is normalized and the noise ( generally, high frequency signal and DC signal) are restrained.

论文完成的主要工作如下： 1、通过对压电加速度传感器测量电路的理论研究，提出用TL081芯片取代大量的分离元件进行电荷放大器的优化设计方案，从而提高了电路的集成度，使其具有体积小、功耗低、寄生因素少和抗干扰性能强的优点。

The application of this theory in the attributable optimization of fault diagnosis characteristic parameters is explored. After a brief description of concepts involved in the paper, such as rough set theory and the indiscernibility relation, the methods of how to preprocess the loss value of data and how to discrete the data are discussed.

论文对粗糙集理论及方法在神经网络技术中的应用进行了研究，从而将粗糙集理论与神经网络技术相结合，提出了基于粗糙集理论的神经网络识别系统，利用粗糙集理论来确定神经网络的输入节点数，降低了神经网络的结构的复杂性，给出了该算法的详细步骤。

Some new concepts and algorithms are proposed,such as jobnomial sequence,job perturbation sequence,neighbourhood of job nomial sequence and jobsequence perturbation analysis.These job sequence PA algorithms extend PA techniques aboutcontinuous parameters to discrete parameters and provide some new kinds of tools for solving suchcombination optimization problem.

论文提出了工件序的邻域、摄动序等概念以及对工件序进行摄动分析的思想和算法，将传统的PA算法从连续参数领域推广到离散参数的组合优化领域，为此类组合优化问题增添了新的求解工具。

The method based on blind number is a kind of discrete numerical calculation method, and the example unfurls its flexible fully and proves that this optimization method is reasonable and practicable.

基于盲数的方法是一种离散化的数值计算方法，算例充分展示了其灵活性，证明了该优化方法是合理的和实用的。

In orde to obtain system optimization in high efficiency production and operation safety, the microcosmic problem of goaf treatment was brought into the creative design of mining method and the synergism of two problems was studied. Firstly, in view of the occurrence characteristics and mining conditions of catacalstic ore section of orebody No. 105 in Gaofeng mine in Guangxi province, considering the adaptability to different scale goafs in the ore section, based on mining environment reconstructing idea and continuous mining mode, a new mining method (mining environment reconstructing non-pillar sublevel-strip continuous mining method) was put forward. Then, some repr, esentative goafs were selected and their stabilities were calculated by discrete element method on the basis of differences of goaf scale, surrounding conditions and situ stress field. At last, the mining layout was adjusted on the basis of goafs stability analysis and the goafs were adjusted as a part of cutting engineering, blasting space or stope, so as to determine all kinds of goafs treatment schemes.

摘 要：为在生产高效和作业安全上取得系统整体最优，将碎裂矿段的空区处理微观问题纳入采矿方法创新设计宏观问题中，开展2种问题的协同研究：首先，针对广西高峰矿105号矿体碎裂矿段的赋存特点和开采技术条件，考虑对各种规模空区适应性，基于采矿环境再造和连续采矿理论，提出采矿环境再造无底柱分段分条连续采矿法；然后，根据采空区规模、围岩状况和原岩应力场等条件的差异，在所有采空区中选择具有代表性的空区，运用离散元程序对其稳定性进行计算分析；最后，在稳定性分析的基础上，灵活调整开采布局，将采空区调整为部分切割工程、自由爆破空间或采场，从而确定出各种规模空区的处理方案。

In the aspect of yield optimization, the worst-case distance from the circuit parameter center to the acceptance region boundary are treated by the objective function of yield optimization.

在电路成品率优化方面，将当前电路参数中心到可行域边界的最坏情况距离，作为电路成品率优化的目标函数，利用梯度优化算法，使最坏情况距离达到最大，从而优化电路的成品率。

Based on the theoretical and experimental studies in electrical and mechanical parameters, micro-perforated absorption material in the box, and positions optimization of the actuators and attached masses on the panel, several optimization methods for the acoustic performance of panel speaker are proposed.

基于对平板扬声器电－力参数测量、箱体内衬微穿孔吸声材料、驱动器以及附加质量位置优化的理论研究和实验测试，提出了若干种提高平板扬声器声性能的方法。

And then, after establishing the optimization model in accordance with the principle of optimal design of shape formulas, we could obtain the numerical optimization aerofoil on the basis of NACA0018 master pattern solved by the Fluent console, and discuss the reasons of improvement of power coefficient.

然后按照形函数的优化设计原理，建立了优化模型，用Fluent平台求解，在NACA0018母型基础上得到数值优化翼型，并探讨了能量利用率提高的原因。

Linear constraint particle swarm optimization algorithm is a global optimization dealing with constraints of non-negative and affine real space.

粒子群算法虽有全局优化性能，但也会陷于局部极小，且缺少约束处理机制。

The teacher likes the honeymouthed little girl very much.

老师很喜欢这个嘴甜的小姑娘。

Mr. Notker Bien's interests are traveling, spending quality time with the family and long-distance-running.

诺特卡·柏恩先生热爱旅游，长跑，以及和家人一起共度美好时光。