How to escape education’s death valley Link: https://www.ted.com/talks/sir_ken_robinson_how_to_escape_education_s_death_valley Speaker: Sir Ken Robinson Date: April 2013 文章目录 How to escape ed
Do schools kill creativity? Link: https://www.ted.com/talks/sir_ken_robinson_do_schools_kill_creativity Speaker: Sir Ken Robinson Date: February 2006 文章目录 Do schools kill creativity?Introduct
STP生成树协议,源自【wakin】Xie Sir谢老师的精品课程 STP生成树协议二层网络设计需求和问题:环路问题: STP:==Spanning Tree Protocol,生成树协议,提供两大功能==:BPDU:==Bridge Protocol Data Unit -桥协议数据单元,STP工作协议==BPDU类型:• ==配置BPDU==:• ==拓扑变更通告BPDU-TCN BP
前言 常见的传染病模型按照具体的传染病的特点可分为 SI、SIS、SIR、SIRS、SEIR 模型。其中“S”“E”“I”“R”的现实含义如下: S (Susceptible),易感者,指缺乏免疫能力健康人,与感染者接触后容易受到感染; E (Exposed),暴露者 ,指接触过感染者但暂无传染性的人,可用于存在潜伏期的传染病; I (Infectious),患病者,指有传染性的病人