LS-SVM model based nonlinear predictive control for MCFC system     

CHEN Yue-hua CAO Guang-yi ZHU Xin-jian 《浙江大学学报(A卷英文版)》2007,8(5):748-754

This paper describes a nonlinear model predictive controller for regulating a molten carbonate fuel cell (MCFC). In order to improve MCFC’s generating performance, prolong its life and guarantee safety, it must be controlled efficiently. First, the output voltage of an MCFC stack is identified by a least squares support vector machine (LS-SVM) method with radial basis function (RBF) kernel so as to implement nonlinear predictive control. And then, the optimal control sequences are obtained by applying genetic algorithm (GA). The model and controller have been realized in the MATLAB environment. Simulation results indicated that the proposed controller exhibits satisfying control effect.  相似文献   

哈密顿原理的两个简单应用     

肖忠模 《宜春学院学报》2007,29(4):45-45,66

本文将哈密顿原理应用到经典牛顿力学中的两个简单的运动学问题,比较直观、简洁地阐述了哈密顿原理的内涵.  相似文献   

不对称品牌联盟对弱势品牌稀释研究:"攀龙附凤"还是"引火烧身"?     

郭锐  严良  苏晨汀  周南 《中国软科学》2010,(2)

本研究借助最小均方联结模型来解释和分析不对称品牌联盟对弱势品牌的稀释作用.同时,利用实验证明了该种稀释作用的存在,而且可以利用业务多元化和品牌互补性来调节或减缓该负面作用.该研究对中国日益盛行的国内和国际品牌联盟提出警示即中国品牌与国际品牌的联合可能由"攀龙附凤"的惊喜落到"引火烧身"的恶果.  相似文献   

基于GRA-TOOPSO-LSSVM的港口吞吐量预测     

张华春  黄有方  胡坚堃 《上海海事大学学报》2017,38(1):43-46

为对港口吞吐量进行科学预测,在最小二乘支持向量机(Least Squares Support Vector Machine,LSSVM)基础上,引入灰色关联分析(Grey Relational Analysis,GRA)和二阶振荡粒子群优化(Two-Order Oscillating Particle Swarm Optimization,TOOPSO),提出一种新的GRA-TOOPSO-LSSVM算法预测港口吞吐量.采用GRA法筛选出对上海港吞吐量有重大影响的因素,并将其作为LSSVM的输入变量;采用TOOPSO法对LSSVM的参数进行寻优;运用LSSVM非线性映射的优势对上海港吞吐量进行预测.在上海港吞吐量实证研究的过程中,GRA-TOOPSO-LSSVM算法与TOOPSOLSSVM和基于交叉验证的LSSVM算法进行对比分析.研究结果表明,GRA-TOOPSO-LSSVM算法具有更好的预测精度和收敛速度,为港口吞吐量预测的研究提供了一种新的方法.  相似文献   

两个图的冠的秩     

何梅芝 《湖南科技学院学报》2006,27(11):60-62

设G_1和G_2分别是n阶与m阶顶点互不相邻的简单图,G_1G_2称为G_1与G_2的冠,是通过将G_2复制n个后,把G_1的第i-个顶点与G2的第i-复制的每一个顶点相连而得到的图。本文讨论了一些特殊图类的冠的邻接矩阵的秩,主要是当G2为完全图,完全二部图,Petersens图和CP(k)时两个图的冠。  相似文献   

标准曲线拟合方法的改进     

杨萃娜  李伟 《黑龙江科技信息》2011,(6):12-12

以丁二酮肟分光光度法测定水中镍的标准曲线为例,运用最小二乘法对标准曲线进行拟合,得出,。因x即吸光度趋于零时,镍含量y可能为负数,不符合客观实际,所以对其标准曲线的拟合进行了改进,对如何改进进行了探讨。  相似文献   

对称矩阵逆特征值问题的向后误差     

邱建军 《乐山师范学院学报》2013,(12):16-18

给出了对称矩阵逆特征值问题的一个更一般的向后误差计算公式,推广了孙继广的结论,并给出一个简单的证明。  相似文献   

An analysis of legal issues relating to the least restrictive environment standards     

Turki Abdullah Alquraini 《Journal of Research in Special Educational Needs》2013,13(2):152-158

The lack of clear language in the Individuals with Disabilities Education Act (IDEA), which is the federal law that governs the provision of special education and related services to children with disabilities in the USA, has led to inconsistencies in school districts' decisions regarding the least restrictive environment (LRE). This uncertainty in determining an appropriate LRE has become a significant obstacle to educating students with disabilities. Therefore, this paper examines a number of court cases that have challenged school districts to provide the LRE for students with disabilities and have handed down decisions that define specific standards that are useful for school teams to implement the mandate of the LRE. Through the synthesis of these cases, the author provides criteria for determining the LRE for students with disabilities that could enhance inclusive education for these students. Finally, the author suggests that legislators should reconsider the language of LRE, make it more specific regarding the determination of LRE, and apply the standards defined in these cases and others to state a clear formula for developing LRE that could be utilised in school districts throughout the country.  相似文献   

多元线性回归在海洋环境分析中的应用   总被引：1，自引：0，他引：1  

王飞梅  梁家海  李尚平 《钦州学院学报》2012,27(3):16-18,107

海洋生态系统是一个复杂的随机系统,根据钦州港采集的数据样本,分析了表层海水pH值与磷酸盐、亚硝酸盐、铵盐、叶绿素a之间的关系,并应用基于最小二乘法的多元线性回归分析确定pH与磷酸盐、亚硝酸盐、铵盐、叶绿素a的回归方程,有效地反映了磷酸盐、亚硝酸盐、铵盐、叶绿素a的酸碱性,表明多元线性回归在海洋环境分析中有很强的实用性。  相似文献   

特征值问题双线性元的误差展开计算     

苑静  黄林静 《河北软件职业技术学院学报》2003,5(1):41-42

本文对Poisson方程的特征值采用双线性元进行展开,得出了特征值的上界,并给出算例。  相似文献