重囗另类BBWSeⅹHD,av狼论坛,精品一卡2卡三卡4卡乱码理论,体育生gv老师浪小辉3p警察

Early Electronic Computers

時間:2023-05-04 19:07:58 大學英語寫作 我要投稿
  • 相關推薦

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)

【Early Electronic Computers】相關文章:

Electronic Industries Alliance05-04

On computers英語作文(精選6篇)12-20

ELECTRONIC SUPPORT FOR KNOWLEDGE CREATION IN A RESEARCH INSTITUTE04-29

Early tectonic uplift of the northern Tibetan Plateau05-02

小學英語作文:Electronic product influence communication abilities02-29

Valence electronic structure and cohesive property of a binary noble metal nitride04-27

A New Ornithocheirid from the Early Cretaceous of Liaoning Province, China05-02

Early-Mid Ordovician brachiopod diversification in South China05-02

A New Ctenochasmatid Pterosaur from the Early Cretaceous of Liaoning Province05-02

New Azhdarchid Pterosaur from the Early Cretaceous of Western Liaoning05-02

主站蜘蛛池模板: 玉田县| 武陟县| 留坝县| 泰安市| 卓尼县| 榆中县| 昭苏县| 平泉县| 辽阳市| 临泉县| 遂川县| 济宁市| 合川市| 全州县| 满洲里市| 阜新市| 福建省| 保亭| 疏附县| 郴州市| 和林格尔县| 西盟| 松潘县| 利津县| 镶黄旗| 桑日县| 屏东县| 肇庆市| 高邑县| 成都市| 北票市| 伊川县| 静海县| 同仁县| 苍山县| 安平县| 株洲县| 故城县| 五莲县| 思茅市| 镇赉县|