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China's Tianhe-2 supercomputer - 英语听力
From VOA learning english
This is the technology report
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 point
86 petaflop or quadrillion of operations per second
China's national university of defense technology
Developed the supercomputer
Which runs twice
As fast as the no
2 rated titan supercomputer
It belongs to the United States government's
Oak dge national laboratory in tennessee
Both tianhe-2 and titan are part of an ongoing race
To make supercomputers faster and more powerful
So what is a supercomputer
A basic personal computer has one microchip
At the center of it's operations
This central processing unit
Or CPU
Executes a set of commands contained in a predesigned program
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 univesity of Vergania
Explences
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
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
Professor Grimshaw says anyone with enough resources
Can build a supercomputer to solve problems
That require millions of mathematical calculations
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
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
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
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
Professor Grimshaw says
The increasing computing ability of supercomputers
Makes the future of research very bright
And that's the technology report from VOA learning english
