In this paper, the thermal error calibration principle of precision machines is presented, and the accuracy index of active calibration thermal deformation is proposed.

研究精密机械热误差校正的机理，提出主动热校正控制变形误差的精度指标。

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This paper explains the functions and varieties of inertial guidance measuring equipment, and gives information about its typical structures and the concept of basic accuracy index.

阐述了惯导测试设备的作用、种类，介绍了其典型结构及基本精度指标的概念。

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Specifically, the hit area circular error probability (ACEP) is defined as an accuracy index for the area target and further a Monte Carlo integral method is designed for calculating ACEP.

建立了一种针对导弹武器射击面目标的精度评定方法，定义了命中面目标的精度指标命中区域圆概率偏差，设计了基于蒙特。

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Dr. Bollen and his colleagues, for example, found that the millions of Twitter messages sent via mobile phones and computers every day captured swings in national mood that presaged changes in the Dow Jones index up to six days in advance with 87.6% accuracy.

WSJ: The Really Smart Phone