人脑与电脑(The Brain and the Computer)[推荐下载]

发布时间：2019-07-22 01:05:14 来源：文档文库

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人脑与电脑(The Brain and the Computer)

Some recent developments in the computer industry make

scientists predict that the gap between human beings and

machines will be closed about the year 20000.

To understand the significance of this prediction let us

compare the human brain with existing computers. The brain

consumes electrical energy at the rate of 25 watts and occupies

a volume of one tenth of a cubic foot. The brain houses between

10 billion and 100 billion items of information. Every brain

cell is directly connected to many other cells. As a result, the

cells in which information is stored can communicate with

thousands of other cells.

However, the computer consumes 1000,000 watts of electrical

power and occupies hundreds of cubic feet of space. Its million

items of immediately accessible information. In contrast, the

computer memory is like a cell of pigeonholes, with no thinking

capacity and no connections elsewhere.

In a word, the electronic brains are hopelessly inadequate in

comparison with the human brains.

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