Assuming that the composites are homogeneous and continuous on macrostructure, a representative volume element (RVU) including a stitch repeat and resin was taken to setup analysis model.

在假定该材料宏观上是均匀与连续的条件下，选取了织物的一个完全组织及所包含的树脂作为一个代表性体元来建立分析模型。

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Hospitals are beholden to the RVU system only because that is how they get paid by the government.

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But even by this suboptimal RVU-based measure, there are a number of well-done studies that all show that productivity declines, sometimes substantially.

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Most hospitals, including public companies like HCA Holdings, Inc (NYSE:HCA) track productivity by borrowing from the RVU system that Medicare uses to set reimbursement rates.

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