网络常见问题与故障1000例（PDF）我、网络故障基本的都包含了，大家互相学习-Frequently Asked Questions networks with 1000 cases of failure (PDF) Me, the network contains the basic fault, and everyone to learn from each other

一个简单的文本编辑器的实现，代码量在一千多-A simple implementation of a text editor, code volume at more than 1000

when SNR is high , 1st sample estimator provides good estimate of A. it has no ise effect . so we don’t need averaging effect to reduce noise when SNR is high. However variance is still low in sample mean estimator which shows that in reality ,samp