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VOA慢速英语(翻译+字幕+讲解):天河2号名列超级计算机500强之首

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From VOA Learning English, this is the Technology Report.

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China's Tianhe-2 supercomputer has just been rated No. 1 on the top 500 -- a respected list of the world's most powerful computers. Experts measured the supercomputer's performance at 33.86 petaflop or quadrillion of operations per second.

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China's National University of Defense Technology developed the supercomputer, which runs twice as fast as the No. 2 rated Titan super computer. It belongs to the United States Government's Oak Ridge National Laboratory in Tennessee. Both Tianhe-2 and Titan are part of an ongoing race to make supercomputers faster and more powerful.

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So what is a supercomputer? A basic personal computer has one microchip at the center of its operations. This Central Processing Unit, or CPU, executes a set of commands contained in a predesigned program.

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The first supercomputers had a few more CPUs. That number grew as microprocessors became cheaper and faster. Andrew Grimshaw, a computer science professor at the University of Virginia explains:

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"Today, supercomputers are all what we call parallel machines. Instead of one CPU - central processing unit - they have thousands and thousands. And in the case of the Chinese machine, depending on how you count, millions of the central processing units."

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These parallel machines are made up of many individual computers called nodes. They are all positioned in one block. They used a lot of power, create a lot of heat, and require huge cooling systems. They also use programs different from those used by ordinary computers.

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Professor Grimshaw says anyone with enough resources can build a super computer to solve problems that require millions of mathematical calculations.

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But that's not always necessary. A virtual supercomputer can be created by networking individual computers within a university campus or company. These machines then process data during down time, when no one is using them.

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"Those are very easy to run on virtual supercomputers because each problem is independent of all the others and I can scatter these jobs out all around the place. We run these all the time at UVA."

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Professor Grimshaw says that entire ten years ago, engineers worked on making computers faster. Since then, he says, they have worked to create more powerful parallel machines.

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"It's transforming science and engineering, and it's going to continue to transform it in ways I think most people don't fully grasp - how well we can model and simulate the world now."

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Professor Grimshaw says the increasing computing ability of supercomputers makes the future of research very bright.

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And that is the Technology Report from Learning English.

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译文属可可原创,仅供学习交流使用,未经许可请勿转载

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current ['kʌrənt]

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n. (水、气、电)流,趋势
adj. 流通的

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independent [indi'pendənt]

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adj. 独立的,自主的,有主见的
n. 独立

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hydrogen ['haidridʒən]

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n. 氢

 
code [kəud]

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n. 码,密码,法规,准则
vt. 把 ...

 
defense [di'fens]

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n. 防卫,防卫物,辩护
vt. 防守

 
myth [miθ]

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n. 神话

 
measured ['meʒəd]

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adj. 量过的,慎重的,基于标准的,有韵律的 动词me

 
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v. 解决,解答

 
simulate ['simjuleit]

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vt. 假装,模仿

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