Aiming at the influence effects of roof stratum on rock burst, the research methods of physical simulation experiment in laboratory, UDEC 4.
针对顶板岩层对煤体冲击的影响作用机理，采用实验室物理模拟试验、UDEC 4。
It is necessary to establish VSCF doubly-fed wind power physical simulation system in the laboratory, as the actual wind experiment research is expensive and time-consuming.
由于实际风电场的实验研究费时费力、实验费用昂贵，因此有必要在实验室条件下建立变速恒频双馈风力发电物理模拟系统。
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