The total efficiency of the runoff model from 1981 to 1990 is 61.3%, and the main reasons of the low modeling precision were analyzed also.

1990年产汇流模拟总体效率为61。 3%，本文同时也分析了模型精度偏低的原因。

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This approach can improve modeling precision and efficiency of producing involute gear, and provide necessary condition for finite element method analysis of involute gear.

该方法可以提高渐开线齿轮造型精度与效率，从而为渐开线齿轮的有限元分析提供了必要条件。

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The methods to enhance the modeling precision for the universal GM(1,1) applied to predicting the development of a mechanical pump based on vibration features were studied.

建立了基于机械系统振动特征量的时间序列趋势预测GM（1，1）并进行了后验差精度检验；

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The high-performance systems that Lockheed Martin develops require a range of technologies, including cloud computing, biometrics, information management, modeling and simulation, precision pointing, energy management and storage, optics and electro-optics, and nanotechnology.

ENGADGET: Lockheed Martin's technology hub brings startups closer to government needs