摘要
构造出两类基函数wi(x)和u i(x)(i=1,2,…,n),利用这两类基函数构造出定义于开区域D=(x1,x2)∪(x2,x3)∪…∪(xn,xn+1)内分段函数的初等表达式和定义于闭区域[x1,xn+1]上的分段函数的初等表达式,并对这两类分段函数的初等性进行了研究,得到了一些重要结论.
Two kinds of elementary function that wi（x） and ui（x） （i = 1,2,…,n） were constructed. By using these two kinds of elementary function,the step function＇s elementary expression both in the open region： D=（x1,x2）∪（x2, x3） ∪… ∪（xn, xn＋1） and in the closed region： [x1, xn＋1 ] were constructed. At the same time,the elementary properties of these two kinds of the step function were studied, and then some significant conclusions were obtained.
出处
《天津科技大学学报》
CAS
2009年第4期76-78,共3页
Journal of Tianjin University of Science & Technology
关键词
分段
初等
函数
表达式
step
elementary
function
expression
