电源谐波分析及治理

随着非线性负载的逐渐增加,供电电源的谐波越来越严重,对电网、供电设备和用电设备危害也越来越大。引起了供电部门和用户对谐波的抑制和治理的重视,对UPS电源及其他系统谐波治理应选择合理方案才能取得良好的效果。     

二阶非线性脉冲微分方程的振动性

利用R iccati变换、函数平均法和辅助函数,讨论了一类带脉冲二阶非线性时脉冲微分方程解的振动性,并得到了这类方程所有解振动的一组充分条件.     

Nonlinear Analysis of Shape Memory Alloy Component in Rotor System

The active control of rotor vibration was studied while shape memory alloy (SMA) spring component was chosen as bearing of rotor system. The vibration of rotor system was controlled by the phase transformation of SMA with electric heating method. The SMA spring component has nonlinear coupling problem of thermal stress and thermal elasticity, because thermal constants α,β and elasticity constants γ, G vary with temperature when temperature changes sharply. Because δ,ε were both small parameters, their square items could be ignored and approximate results were obtained by perturbation. The characters of α,β, γ, G changing with temperature were analyzed. Results show that the character of thermal diffusivity ot changes with temperature, which cannot influence U,Ψ,So the nonlinearity of ot can be ignored; the character of,β changes with temperature,which cannot influence U, but influences Ψ at high temperature; the character of γ, G change with temperature, which cannot influence Ψ, but influences U with U^(01) ε. The more γ ,G, the more their influence on U;the nonlinearity of βT/pcvεkk influences U and Ψ, which must be calculated.     

离散非线性最优迭代学习控制近似算法

对于离散非线性系统迭代学习控制，在最优迭代因果学习律的存在性条件算法收敛性条件基础上，针对实际应用，提出了一种近似迭代算法，证明了近似迭代控制收敛于最优控制。     

求解非线性微分方程精确行波解的代数法

给出了求解非线性微分方程精确行波解的代教法,利用此方法获得了非线性微分方程若干形式的精确行波解,并在计算机代数系统REDUCE上得以实现．     

一类非线性系统的自适应模糊滑模控制

针对一类不确定非线性系统提出了一种自适应模糊控制方法。该方法用模糊逻辑系统(FLS)逼近理想控制器；用滑模补偿控制器(SMCC)全局补偿逼近误差和系统的不确定性并消除外部干扰的影响，能够保证闭环系统全局渐近稳定，跟踪误差收敛到原点的邻域内。在闭环系统的稳定性分析中取消了文[1-4]中要求的逼近误差平方可积的条件。     

金属有机化合物在光电磁材料中的应用

本文综述了金属有机化合物在光电磁材料中的应用.     

一类非线性双曲型方程的初边值问题

讨论了方程uu=uxxt σ（ux）x的混合初边值问题第二边值问题，用Galerkin方法和紧性方法得到问题的整体广义解和整体古典解的存在性与唯一性。     

一类二阶非线性摄动微分不等式振动性的新结果

研究了一类二阶非线性摄动微分不等式解的振动性,建立了两个新的振动性定理,推广和改进了已有的结果.     

光学教学改革的探索与实践

以在基础理论教学中穿插光纤通信的密集波分复用技术为例，论述了将现代光学前沿课题与基础理论相结合，促进光学教学改革的想法和做法。