非线性优化

Oscillator ; Model ; Nonlinear analysis ; Optimization ; Varactor

振荡器；模型；非线性分析；优化；变容二极管

Nonlinear rescaling methods,based on a class of nonlinear Lagrangians,are important in constrained optimization.

非线性重新尺度化方法是求解约束优化问题的一类重要的算法。

A general no nlinear programming model and a genetic algorithm optimization procedure fo r electrical design of airborne radomes are presented in this paper.

汪文秉 ，万伟，万国宾将雷达罩的各种电性能的优化问题统一表示为非线性规划的形式，并应用遗传算法进行求解。

In this paper,a nonlinear planning method, quasi Newton multiplier method ,is introduced for the optimization of the bracing stiffness in braced frame structures with symmetric bracings.

本文针对设置有对称斜腹杆的钢筋混凝土框架－桁架结构，运用非线性规划方法拟牛顿乘子法，对框架－桁架结构体系中斜撑的刚度进行优化。

Limits to the minimum spot size, imposed by space-charge effect, emittance and spherical and chromatic aberrations of the lens, are investigated by means of a five-order radial trajectory equation, the K~V envelope equation and an analytical method.

理论上，利用推导的非线性轨迹方程、K-V包络方程及解析方法研究了空间电荷效应、发射度、透镜球面像差和色散像差对最小焦斑直径的限制并对聚焦实验布局和参数进行了优化选择。

The pulverized systems optimized operation in power station is a multi-variable, non-linear and time-variant issue which is restricted by many conditions, such as combustion stability, mill safety and furnace slagging problem, in addition, the controlling parameters and restricted conditions are coupling each others.

电站制粉运行优化是一类多变量非线性时变系统，同时受到燃烧稳定性、磨的安全性、炉膛结焦等因素约束，且控制参数和约束条件之间相互耦合制约。

Based on the inverse kinematics, forward kinematics of six-bar parallel mechanism in beamline is obtained by trust region method for nonlinear optimization. The corresponding program with MATLAB language is also designed.

以六杆并联机构的逆运动学为基础，采用信赖域法对非线性超越方程组进行优化，编制相应的MATLAB程序，求解机构的正运动学，得到了动平台中心的运动轨迹和基本规律。

Problems such as charge injection and clock feedthrough caused by turning off swithes are analyzed and solved in this design. The optimal switch sequence helps eliminate the nonlinearity caused by the charge injection; the addition of dummy switches to sensitive nodes caused by the clock feedthrough can greatly reduce the coupled charge; and the use of high PSRR folded cascode differential input stage can restrain the interference from the power supply. The circuit performance, therefore, has been greatly improved.

设计中分析并解决了因时钟信号引起的制约开关性能的因素：优化的开关时序消除了电荷注入引起的非线性；时钟馈通敏感节点增加虚拟开关抵消了耦合电荷；高PSRR共源共栅折叠式差分输入结构，有效地抑制了来自电源的干扰，改善了电路的性能。

In the traditional neural networks based on gradient decline, nonlinear object functions with multiple extrema are easy to get stuck in the problem of local optimization solution. Therefore, a new method of chaos optimization neural network with weight learning is introduced in this paper.

针对传统的基于梯度下降法BP神经网络中存在非线性多极值目标函数易陷于局部最优解的问题，提出了一种权值学习混沌优化的神经网络方法。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。