Note: Maintenance includes keeping a functional unit in a specified state by performing activities such as tests, measurements, replacements, adjustments and repairs.

注：维修是指通过一些活动，诸如测试、测量、更换、调整以及修复等，使功能部件维持在规定状态。

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Summarize how to design quantum state tomography, and analyze how to optimize The Times of different measurements.

对量子状态层析的实验设计进行总结，并着重分析了测量次数最优化问题。

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Maintenance includes keeping a functional unit in a specified state by performing activities such as tests, measurements, replacements, adjustments and repairs.

维修是指通过一些活动，诸如测试、测量、更换、调整以及修复等，使功能部件维持在规定状态。

youdao

The results were reached via global positioning satellite measurements taken before and after the February 27 quake by teams from The Ohio State University, the University of Hawaii, the University of Memphis and the California Institute of Technology, as well as agencies across South America.

CNN: Chile quake moves city more than 10 feet

It delivers high-resolution information on the state of the atmosphere that supplements the broader imagery coming from the geostationary Meteosats and the point measurements we get from balloons (radiosondes), and the like.

BBC: Weather satellites and the gathering storm