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2018-01-20 19:12:30

373全讯网373全讯网水之美拆分盘,实力国际大盘,373全讯网目前加入先机中先机373全讯网,侵权人应当承担相应民事责任。本案中被告在其微信公,止挑战,享受五折优惠。但是,与韩某同行的朋友们纷纷

Bank of China announces .93 billion profit in first half of 2016

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与此同时,日照市本年度凭借其良好的表现,增幅最大,排名上升12席,跃居第五。

电信大数据产业联盟成立恰逢其时,不仅为贵州大数据产373全讯网

业内人士指出,这相当于继电票贴现不再审核合同、发票等资料后纸票贴现也无需提供合同、发票。美国政府将在吸引外资上被迫与私营部门竞争,从而导致经济中生产性资金的流失。

Once the new guideline is put into use, administrative procedures required for registration will be reduced by 95 percent.BEIJING - The cylinder-shaped black object bears no resemblance to any ordinary clock, but it is one of the most advanced timepieces ever.

It was sent to space with the Space Laboratory of China's Tiangong-2 on Thursday, becoming the first ever cold atom clock working in space.

"This clock is so accurate that it should not lose one second in 30 to 300 million years in space," says Liu Liang, professor and director of the Key Laboratory of Quantum Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences.

Unlike ordinary clocks, the timekeeping device is based on atomic physics.

And unlike the most atomic clocks, this clock uses more advanced "cold atom" technology, ensuring its ultra precision.

A mechanical watch loses almost one second a day; a quartz watch loses about one second every 10 days; the hydrogen atomic clock loses about one second over millions of years; the cold atom clock exceeds all in accuracy, Liu says.

Scientists attribute its accuracy to the microgravity environment in space as well as the coldness of the atoms the clock uses.

Under microgravity conditions, the cold atoms, pushed by lasers, perform a uniform motion in a straight line. By observing their performance, scientists get more precise atomic clock signal than under the gravity conditions on Earth.

Moreover, the laser cooling technology helps to eliminate the influence of atomic thermal motion on the clock's performance.

"Though molecules and atoms can't be seen in a room, they are actually moving at high-speed, and the speed is equivalent to temperature," Liu explains.

"We use laser cooling technology to slow down the atoms to a temperature that a refrigerator could never reach, so they nearly stay still," Liu says. "By observing the almost static atoms we make our measurements more precise."

Scientists believe that putting such a clock in space will help set a time standard to synchronize other atomic clocks in space more precisely.

"A more accurate clock system in space will benefit us on Earth," Liu says, citing possible substantial improvements in navigation and positioning accuracy.

Scientists say the development of cold atom technology could also make many experiments possible, such as deep space navigation and positioning, dark matter probes, and even gravitational wave exploration.

"A lot of research is based on our measurement of time and space. If we could detect subtle changes in time and space, we could make discoveries beyond the range of existing technology," Liu says.

"In the future, there will be more accurate clocks than this cold atom clock and our ultimate goal is to make a clock that will never be a second fast or slow over the life of the universe."

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373全讯网At 5 am, the eye of the typhoon was above the South China Sea some 275 km to the southeast of Hong Kong, the National Meteorological Center (NMC) said in a statement.

The local authorities are building a major logistics center in the city because of its position in western China.

(责任编辑: HN666)奥迪A7最高优惠17.96万 提供试乘试驾 第1页:A7优惠17.96万元

该组织将北极熊列为了在野生环境中灭绝风险高的脆弱物种。1个月前,贾跃亭一封题为《乐视的海水与火焰:是被巨浪吞没还是把海洋煮沸?》的内部信将乐视“欠款门”推向高潮,而后在乐视掌门人贾跃亭长江的一群“同学”帮忙下,宣布获得6亿美元投资,让资金链趋紧的风波告一段落。他认为,人民币扩大汇率浮动幅度以来,中国汇率改革正处在起步阶段,涨跌均属正常。