作业帮要一篇关与电子科技的英语作文随便写哈拉,明天要交了虽然我看不懂你写的，但感觉不是，麻烦大体翻译哈一看就不是我能写出来地
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要一篇关与电子科技的英语作文随便写哈拉,明天要交了虽然我看不懂你写的，但感觉不是，麻烦大体翻译哈一看就不是我能写出来地
要一篇关与电子科技的英语作文
随便写哈拉,明天要交了
虽然我看不懂你写的，但感觉不是，麻烦大体翻译哈
一看就不是我能写出来地
要一篇关与电子科技的英语作文随便写哈拉,明天要交了虽然我看不懂你写的，但感觉不是，麻烦大体翻译哈一看就不是我能写出来地
http://www.tankockkyi.blogchina.com/1302413.html
英语科技论文写作(技巧+范文)
http://www.swufe.com/Soft/ShowSoft.asp?SoftID=47
Early Electronic Computers
The first real progress toward electronic digital computer came in the late 1930s when Howard Aiken of Harvard University and George Slibits of Bell Telephone Laborato...
全部展开
Early Electronic Computers
The first real progress toward electronic digital computer came in the late 1930s when Howard Aiken of Harvard University and George Slibits of Bell Telephone Laboratories developed an automatic calculator using relay networks;the relay is an electromagnetically controlled switch.Other relay machines were developed during World War II for artillery ballistic calculations.Although these machines were relatively slow and comparatively large. they demonstrated the versatility of the electronic computer. Then,in the early 1940s, John Mauchly and J.Presper Eckert,Jr.,of the University of Pennsylavania designed and built a vacuum tube computer,which they called the electronic numerical inegrator and calculator(ENIAC);it was completed in 1945 and installedat Aberdeen Proving Ground,Maryland. ENIAC used 18000 electron tubes,which required tremendous amounts of power;its failure rate wa high and it was difficult to program because a plugboard was required.
Three very important discoveries were then made,which began the rapid evolution toward today's digital computer. First,John von Neumann proposed that the program reside in the computer's memory where it could be changed at will,solving the pogranmming difficulties of ENIAC;second,in 1947 the transistor was invented by John Bradeen,Waltr H.Brattain, and William Shockley,which drastically reduced the size and power requirements by replaceing the electron vacuum tube;and.third, J.W.Forrester and his associates at the Massachusetts Institute of Technology developed the magnetic,core memory,which made large amount of storage feasible.
Reference book:
Digital Logic Circuit Analysis and Design
(Authors:Victor P.Nelson
H.Troy Nagle
J.David Irwin)
收起
Early Electronic Computers
The first real progress toward electronic digital computer came in the late 1930s when Howard Aiken of Harvard University and George Slibits of Bell Telephone Laborato...
全部展开
Early Electronic Computers
The first real progress toward electronic digital computer came in the late 1930s when Howard Aiken of Harvard University and George Slibits of Bell Telephone Laboratories developed an automatic calculator using relay networks;the relay is an electromagnetically controlled switch.Other relay machines were developed during World War II for artillery ballistic calculations.Although these machines were relatively slow and comparatively large. they demonstrated the versatility of the electronic computer. Then,in the early 1940s, John Mauchly and J.Presper Eckert,Jr.,of the University of Pennsylavania designed and built a vacuum tube computer,which they called the electronic numerical inegrator and calculator(ENIAC);it was completed in 1945 and installedat Aberdeen Proving Ground,Maryland. ENIAC used 18000 electron tubes,which required tremendous amounts of power;its failure rate wa high and it was difficult to program because a plugboard was required.
Three very important discoveries were then made,which began the rapid evolution toward today's digital computer. First,John von Neumann proposed that the program reside in the computer's memory where it could be changed at will,solving the pogranmming difficulties of ENIAC;second,in 1947 the transistor was invented by John Bradeen,Waltr H.Brattain, and William Shockley,which drastically reduced the size and power requirements by replaceing the electron vacuum tube;and.third, J.W.Forrester and his associates at the Massachusetts Institute of Technology developed the magnetic,core memory,which made large amount of storage feasible.
Reference book:
Digital Logic Circuit Analysis and Design
(Authors:Victor P.Nelson
H.Troy Nagle
J.David Irwin)
收起