置换算法最近最不经常使用（NRU）算法通过对页面、页表、地址转换和页面置换过程的模拟，加深对请求调页系统的原理和实现过程的理解。-Replacement algorithm is the least frequently used recently (NRU) algorithm through the pages, page tables, address translation and page replacement process simulation, to deepen the re