双语畅销书《艾伦图灵传》第9章:退隐山林(6)
But even apart from the politics of the machine, Alan had come too late to direct its development.
不过,即使不考虑政治方面,图灵仍然来得太晚了。Already the important decision had been taken to adopt, for use as a large, slow, backing store, a rotating magnetic drum such as A.
他们已经决定采用旋转式磁鼓,作为一个大容量、低速存储器。With digits stored on tracks around the drum to be read off by a head, this was equivalent to providing a large number of slow, cheap, delay lines for the storage of data and instructions not immediately in use.
数据可以存储在磁道上,被一个磁头读取,这在效果上等同于大量的低速、低成本延迟线。
Another innovation in the design, a modification originally suggested by Newman, was that of the 'B-tube'.
这项设计中的另一个创新之处,是纽曼提出的"B管",(It was so called because the arithmetic and control tubes were naturally 'A' and 'C' tubes respectively.)
这个名称是因为,算术管和控制管分别叫作"A管"(即Arithmetic,意为算术)和"C管"(即Control,意为控制)。This additional cathode ray tube had the property of modifying the instructions held in the control;
这一新增的射线管,可以在控制过程中改变指令,in particular it could be used when working along a sequence of numbers, in such a way that the idea of the 'next' number did not have to be rendered into laborious programming.
这在操作一组连续的数据时尤其有用,比如"下一个数"这样的想法,在程序中就可以大大简化注。As such it was contrary to the general policy that Alan had pursued on the ACE design, that of using instructions rather than hardware as far as possible.
然而这样的设计,与图灵的想法是完全不同的,图灵认为应该尽可能地把任务交给程序,而不是硬件。-
大学励志英语故事阅读
英语是一种交流的工具,口语交际能力的重要性不言而喻。故事英语教学法是一种创新性教学方法,它能提高学生的口语能力,培养学生用英语思维的能力,在表达、语音、语感等方面也起着突出的作用。本文是大学励志英语故事,希望对大家有帮助!大学励志英语故事:厚积薄发,永不...
-
关于少儿英语故事材料精选
在小学英语教学中,英语故事教学这种方法在提高学生英语水平上效果非常显著。小编精心收集了关于少儿英语故事材料,供大家欣赏学习!关于少儿英语故事材料:SaraWentShoppingSaraSmith,aPasadenaresident,wentshopping.Sheis30,andhaslivedat3037N.FoothillStreetsi...
-
英语趣味小故事欣赏
英语故事中丰富的语言输入培养了学生的语感,故事所创设的情境激发了学生学习的兴趣,故事的结构成了学生语言拓展的支架。本站小编整理了英语趣味小故事,欢迎阅读!英语趣味小故事篇一Lookingveryunhappy,apoormanenteredadoctor’sconsulting-room.Doctor,h...
-
儿童英语教学故事
将英语故事寓于教学中,是实现儿童高效英语教学的一种方法,下面本站小编为大家带来儿童英语教学故事,希望对你有所帮助!儿童英语教学故事1:Twogirlsweretrick-or-treatingonHalloweennightwhenalargegroupofteensattackedthem,leavingbothhighschoolseniorsunconsci...