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时间单位与存储单位换算
阅读量:5074 次
发布时间:2019-06-12

本文共 2062 字,大约阅读时间需要 6 分钟。

 

 

秒以下的时间单位有:秒(s)、毫秒(ms)、微秒(μs)、纳秒(ns)、皮秒(ps)、飞秒(fs)、阿秒(as)、渺秒(ds)
时间单位换算
1 s
= 10^3  ms(毫秒)
= 10^6  us(微秒)
= 10^9  ns(纳秒)
= 10^12 ps(皮秒)
= 10^15 fs(飞秒)
= 10^18 as(阿秒)
= 10^18 ds(渺秒)
= 10^43 Planck Constant(普朗克常数)
时间单位实际长度
1                                                 s
=1 000                                        ms
=1 000 000                                  us
=1 000 000 000                            ns
=1 000 000 000 000                     ps
=1 000 000 000 000 000               fs
=1 000 000 000 000 000 000             as
=1 000 000 000 000 000 000 000    ds
=1 000 000 000 000 000 000 000 000 000 000 000 000 000 000 0  Planck Constant
      
毫秒                                                                                                                                                                                                                                                                                                                                                                                                                      
  毫秒是一种较为微小的时间单位,是一秒的千分之一。典型照相机的最短曝光时间为一毫秒。一只家蝇每三毫秒扇一次翅膀;蚊子二十毫秒振翅一次;蜜蜂则每五毫秒扇一次。由于月亮绕地球的轨道逐渐变宽,它绕一圈所需的时间每年长两毫秒。在计算机科学中,10毫秒的间隔称为一个jiffy。                                                                                                                                                   
微秒                                                                                                                                                                                                                                                                                                                                                                                                                      
  即百万分之一秒,光在这个时间里可以传播300米,大约是3个足球场的长度,但是海平面上的声波只能传播1/3毫米。高速的商业频闪仪闪烁一次大约持续1微秒。一筒炸药在它的引信烧完之后大约24微秒开始爆炸。                                                                                                                                                                                                                                          
纳秒                                                                                                                                                                                                                                                                                                                                                                                                                      
  一秒的10亿分之一,即等于10的负9次方秒。常用作内存读写速度的单位。光在真空中一纳秒仅传播30厘米(不足一个步长)。个人电脑的微处理器执行一道指令(如将两数相加)约需2至4纳秒。另一种罕见的亚原子粒子K介子的存在时间为12纳秒。                                                                                                                                                                                            
皮秒                                                                                                                                                                                                                                                                                                                                                                                                                      
  即十亿分之一秒的千分之一,最快晶体管的运行以皮秒计。一种高能加速器产生的罕见亚原子粒子b夸克在衰变之前可存在1皮秒。室温下水分子间氢键的平均存在时间是3皮秒。                                                                                                                                                                                                                                                                                     
飞秒                                                                                                                                                                                                                                                                                                                                                                                                                      
  飞秒(femtosecond)也叫毫微微秒,简称fs,是标衡时间长短的一种计量单位。1飞秒只有1秒的一千万亿分之一,即1e?15秒或0.001皮秒(1皮秒是,1e?12秒)。即使是每秒飞行30万千米的光速,在一飞秒内,也只能走0.3微米,不到一根头发丝的百分之一。可见光的振荡周期为1.30到2.57飞秒。一个分子里的一个原子完成一次典型振动需要10到100飞秒。完成快速化学反应通常需要数百飞秒。光与视网膜上色素的相互作用(产生视觉的过程)约需200飞秒。
阿秒                                                                                                                                                                                                                                                                                                                                                                                                                      
  阿秒英文名是attosecond,相当于10的负18次秒 ,是非常小的时间单位。如果宇宙的年龄几百亿年,那么10的负18次 相当于其中的1秒。                                                                                                                                                                                                                                                                                             
渺秒                                                                                                                                                                                                                                                                                                                                                                                                                      
  渺秒,百亿亿分之一秒,最短暂的时间。中性π介子的寿命。科学家是用渺秒来对瞬时事件进行计时的。 研究人员已经用稳定的高速激光产生了仅持续250渺秒的光脉冲。                                                                                                                                                                                                                                                                                                                      
普朗克常数
        可能持续的最短时间 ,尽管渺秒这一时间间隔短得无法想像,但是和普朗克常数相比还是很长的。普朗克常数大约为10^43分之一秒,被认为是可能持续的最短时间。
        
        
计算机存储单位有:B、KB、MB、GB、TB、PB、EB、ZB、YB、BB
存储单位换算  
1 B = 8     bit
1KB = 10^3  byte
1MB = 10^6  byte
1GB = 10^9  byte
1TB = 10^12 byte
1PB = 10^15 byte
1EB = 10^18 byte
1ZB = 10^21 byte
1YB = 10^24 byte
1BB = 10^27 byte
1NB = 10^30 byte
1DB = 10^33 byte     
存储单位实际长度
 b
1 B = 8 bit
1kB = 1 000                                        
1MB = 1 000 000                                    
1GB = 1 000 000 000                                
1TB = 1 000 000 000 000                            
1PB = 1 000 000 000 000 000                        
1EB = 1 000 000 000 000 000 000                    
1ZB = 1 000 000 000 000 000 000 000                
1YB = 1 000 000 000 000 000 000 000 000            
1BB = 1 000 000 000 000 000 000 000 000 000        
1NB = 1 000 000 000 000 000 000 000 000 000 000    
1DB = 1 000 000 000 000 000 000 000 000 000 000 000

转载于:https://www.cnblogs.com/janas/archive/2012/02/15/2352927.html

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