首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
The more time scientists spend designing computers, the more they marvel at the human brain. Tasks that stump the most advanced
The more time scientists spend designing computers, the more they marvel at the human brain. Tasks that stump the most advanced
admin
2010-01-07
48
问题
The more time scientists spend designing computers, the more they marvel at the human brain. Tasks that stump the most advanced supercomputer--recognizing a face, reading a handwritten note--are child’s play for the 3-lb. organ. Most important, unlike any conventional computer, the brain can learn from its mistakes. Researchers have tried for years to program computers to imitate the brain’s abilities, but without success. Now a growing number of designers believe they have the answer: if a computer is to function more like a person and less like an over-grown calculator, it must be built more like a brain, which distributes information across a vast interconnected web of nerve cells, or neurons.
Conventional computers function by following a chainlike sequence of detailed instructions. Although very fast, their processors can perform only one task at a time. This approach works best in solving problems that can be broken down into simpler logical pieces. The processors in a neural-network computer, by contrast, form a grid much like the nerve cells in the brain. Since these artificial neurons are interconnected, they can share information and perform tasks at the same time. This two-dimensional approach works best at recognizing patterns.
Instead of programming a neural-network computer to make decisions, its maker trains it to recognize the patterns in any solution to a problem by repeatedly feeding examples to the machine. This process is like a process that prepares all possible moves in a chess game and try to find a best approach to it. If the examples are not sufficient or complete, the computer will be in for trouble, after all, it can not respond to something it can not recognize as a pattern in its memory.
Neural networks come in all shapes and size. The new networks will make things which were simply impossible completely feasible in the near future. What the users need to do is to wait and see. Developers are experimenting with new equipment and hopefully they will succeed. Until now most existed as software simulations because redesigning computer chips took a lot of time and money. By experimenting with different approaches through software rather than hardware, scientists have been able to avoid costly mistakes.
According to the passage, the expression "this two-dimensional approach" in the last sentence of the second paragraph refers to ______.
选项
A、the conventional computer and the neural computer
B、the lockstep approach and the artificial approach
C、sharing information and performing tasks
D、making decisions and recognizing patterns
答案
C
解析
见第二段第五句。
转载请注明原文地址:https://jikaoti.com/ti/7PBsFFFM
本试题收录于:
公共英语四级笔试题库公共英语(PETS)分类
0
公共英语四级笔试
公共英语(PETS)
相关试题推荐
Whatdoesthespeakersuggestthatthestudentsshoulddoduringtheterm?
RecentsurveysshowthatJapaneseyouthhavebecomea"MeGeneration"thatrejectstraditionalvalues."Around1980manyJa
RecentsurveysshowthatJapaneseyouthhavebecomea"MeGeneration"thatrejectstraditionalvalues."Around1980manyJa
RecentsurveysshowthatJapaneseyouthhavebecomea"MeGeneration"thatrejectstraditionalvalues."Around1980manyJa
RecentsurveysshowthatJapaneseyouthhavebecomea"MeGeneration"thatrejectstraditionalvalues."Around1980manyJa
Therearetwobasicwaystoseegrowth:oneasaproduct,theotherasaprocess.Peoplehavegenerallyviewedpersonalgrowtha
Whowouldbemostinterestedintheadvancesmentionedinthetalk?
Couldthebadolddaysofeconomicdeclinebeabouttoreturn?SinceOPECagreedtosupply-cutsinMarch,thepriceofcrudeoil
AnswerQuestions71to80byreferringtothecommentson4differentcarmodelsinthefollowingmagazinearticle.Answereach
Couldthebadolddaysofeconomicdeclinebeabouttoreturn?SinceOPECagreedtosupply-cutsinMarch,thepriceofcrudeoil
随机试题
患儿男性,2岁。反复发热、尿液浑浊6个月,加重1天。化验尿常规:WBC25/HP,RBC1/HP,尿蛋白(++);血常规:Hb110g/L,WBC16.5×109/L,N85%,L15%。下述检查无需急查的是
血浆白蛋白正常参考值是
ADR监测方法中哪种最常用
患者,男,42岁。既往脾大,HBsAg阳性。今晨排柏油样便约200ml。应首先考虑的是
以扩大的分部分项工程为对象编制的是()。
消防工程应严格按照经__________审核批准的设计图纸进行施工()
做好农民工工作的基本原则是()。
SSL(TLS)协议______。
Whichofthefollowingadjectiveisusedasanoun?
Mostgrowingplantscontainmuchmorewaterthanallothermaterialscombined.C.R.Barneshassuggestedthatitisaspropert
最新回复
(
0
)