科学家开展光钟网络协调比对实验
科学家完成迄今最全面的光学原子钟协调比对实验，跨越6个国家同步运行多台光钟，实现38组频率比对。实验首次采用多种链路技术进行多台光钟同时比对，为重新定义国际单位制中的“秒”提供重要依据。光钟精度远超铯钟，未来有望推动GPS、电网调度和金融交易等现代技术发展及更多科学探索。
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科学家开展光钟网络协调比对实验 中国科技网/科学网
精确定义“秒”的研究工作更进一步，科学家开展光钟网络协调比对实验 央视新闻
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The messaging service and social-media platform owes creditors roughly $700 million by the end of April, according to people briefed on the company’s plans and loan documents viewed by The Wall Street Journal. At the same time, Telegram Group Inc. must cover rising equipment and bandwidth expenses because of its rapid growth, despite going years without attempting to generate revenue.
That growth environment will include rising inflation and interest rates. Those upward shifts naturally accompany healthy growth periods as the demand for resources, products and services rise. Importantly, the Federal Reserve has laid out the rationale for not interfering with that natural growth transition.It's not exactly a fad, but there is a widespread willingness to pay up for a growth story. Classic fundamental analysis takes a back seat. Even negative earnings are ignored. In fact, positive earnings seem to be a limiting measure, producing the question, "Is that all you've got?" The preference is a vision of untold riches when the exciting story plays out as expected.
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