若向量组$alpha_{1},alpha_{2},alpha_{3},alpha_{4}$线性无关，则向量组$alpha_{1}-alpha_{2},alpha_{2}-alpha_{3},alpha_{3}-alpha_{4},alpha_{4}-alpha_{1}$也线性无关.
因为$(alpha_{1}-alpha_{2})+(alpha_{2}-alpha_{3})+(alpha_{3}-alpha_{4})+(alpha_{4}-alpha_{1})=0$,所以$alpha_{1}-alpha_{2},alp...
函数$begin{eqnarray}f(x,y)=begin{cases}frac{x^2y^2}{x^4+y^4},&(x,y)eq(0,0)cr0,&(x,y)=(0,0)end{cases}end{eqnarray}$在点$(0,0)$处
物理页帧数量为5，虚拟页访问序列为4,3,0,2,2,3,1,2,4,2,4,0,3，请问采用工作集置换算法（工作集窗口T=4）的缺页次数为（）
5
物理页帧数量为5，虚拟页访问序列为4,3,0,2,2,3,1,2,4,2,4,0,3，请问采用缺页率置换算法（窗口T=2）的缺页次数为（）
5