巨菌草茎秆力学特性曲线拟合研究  

Study of Curve Fitting of Mechanical Properties of the Stalk of Pennisetum sinese Roxb

作　　者：陈文滔[1] 方兵[1] 梁晓[1] 叶大鹏[1] CHEN Wen-tao FANG Bing LIANG Xiao YE Da-peng(College of Mechanieal and Eiectrical Engineering, Fujian Agriculture and Forestry University, Fuzhou 350002, Fujian,Chin)

机构地区：[1]福建农林大学机电工程学院,福建福州350002

出　　处：《湖北农业科学》2017年第3期561-564,569,共5页Hubei Agricultural Sciences

基　　金：国家菌草工程技术研究中心开放基金项目(JCJJ14002);校高水平建设重点项目(612014017)

摘　　要：为了精确地描述巨菌草(Pennisetum sinese Roxb)茎秆力学性能茎秆抗拉、抗压、抗弯弹性模量,对巨菌草茎秆力学特性曲线进行曲线拟合。通过分析插值函数的构造方法及性质,合理地选取基函数和权函数,并对最小二乘法以及移动最小二乘法的拟合曲线进行了对比。结果表明,移动最小二乘法在巨菌草茎秆力学特性试验曲线拟合中具有更高的精度。In order to accurately describe the mechanical properties of the stalk of Pennisetum sinese Roxb on tensile,compression and bending modulus of elasticity,the curve of mechanical properties of Pennisetum sinese Roxb stalk were fitted.The construction method of interpolation function was detailedly studied and the basis function and weight function were reasonably choose,then compared the least square method and moving least square method in curve fitting.The results showed that the precision of the moving least square method in the curve fitting of mechanical properties of Pennisetum sinese Roxb stalk was higher.

关 键 词：巨菌草(Pennisetum sinese Roxb) 茎秆 移动最小二乘法 力学性能 曲线拟合 

分 类 号：S519[农业科学—作物学]