Neural Network Inverse Adaptive Controller Based on Davidon Least Square

1.IWTaoDUCTIONInrecedeyears,therisingofneuralnetworkcolltrolsuppliesanovelandeffectivemeansforthecontrollingoftheplatwhichhasstrongnonlinearproperty.Thereillto,theneuralnetworkinversecoDtrollersucceededincolltrollingofrobotisasakindofAnportatcolltrolstructure.Battheinversecolltrolschemecannotbeusedincolltrollingofnon-~mumphasesystemduetothenon-stabilityofinversemodelofit.Inaddition,attheaspectofneuralnetworktrainalgorithm,thetraditionalbed-propagationalgoritlunconvergesveryslow.Thesefacto…     

多宗量稳态热传导反问题测点信息研究

针对稳态热传导反问题,从多宗量的角度出发,对测点信息的选取作了探讨.借助有限元空间离散技术,建立了正演分析模型,利用误差信息构造最小二乘函数,建立反演模型,分别探讨了单一和多宗量组合参数识别时测点信息的选取,给出了相关数值算例,总结了一般性规律.     

近似邻域的完备探讨

重新定义了6种点近似邻域和9种集合近似邻域,证明了它们的完备互斥性,并研究了近似邻域的基本性质和与其它邻域、近似算子等的关系,丰富和发展了已有的结果.     

布鲁塞尔方程极限环的近似解

本文给出布鲁塞尔方程的极限环以有理函数表示的近似解，通过算例表明它与数值解的结果基本一致。     

论力学系统在定态无简并情况下的多级微扰作用的近似修正

从量子力学微扰理论出发，导出力学系统在定态无简并情况下，多级微扰作用修正的递推关系·并讨论了该情况下，系统能量的三级近似修正．     

关于确定一类双曲型方程低次项系数的反问题

本文对一类双曲型方程u_u(x,t)-u_ss(x,t)+p(x)u_s(x,t)+q(x)u(x,t)=F(x,t)的柯西问题讨论了如何确定低次项系数q(x)的反问题,文中给出了反问题局部解的存在性与唯一性。     

基于同态变换的图像去噪压缩算法研究

本文首先对噪声污染的信号作乘性转换为加性的同态变换,实现信噪分离,然后应用线性滤波方法进行处理,最后作同态变换的逆变换,达到去噪和压缩的效果。     

柔性路面结构轮间路表弯沉逼近式的研究

本文以现行《公路柔性路面设计规范》为依据,推导出三届弹性体系轮间路表弯觉系数的逼近式,使三层弹性体系弯沉表达式中的无穷积分隐函式显示化,以利于计算式的求解并节省计算机求解的时间。本文还应用多元线性回归理论,推导并验证了四层,五层体系结构层轮间路表弯沉系数的逼近式,以适应当前铺筑多层次的高等级路面的需要。     

From centripetal forces to conic orbits: a path through the early sections of Newton’s Principia

In this study, we test the security of a crucial plank in the Principia’s mathematical foundation, namely Newton’s path leading to his solution of the famous Inverse Kepler Problem: a body attracted toward an immovable center by a centripetal force inversely proportional to the square of the distance from the center must move on a conic having a focus in that center. This path begins with his definitions of centripetal and motive force, moves through the second law of motion, then traverses Propositions I, II, and VI, before coming to an end with Propositions XI, XII, XIII and this trio’s first corollary. To test the security of this path, we answer the following questions. How far is Newton’s path from being truly rigorous? What would it take to clarify his ambiguous definitions and laws, supply missing details, and close logical gaps? In short, what would it take to make Newton’s route to the Inverse Kepler Problem completely convincing? The answer is very surprising: it takes far less than one might have expected, given that Newton carved this path in 1687.     

核平凡逆半群的分类

本文讨论逆半群中的一类,这种逆半群上的同余的核或者是E或者是S,文中给出这类半群的分类并讨论它的D类的构造,最后讨论核平凡同余Clifford半群的结构.