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The gray model based on the gray theory is a model of continuous differential equation. We can make a comprehensive observation and a long-range prediction to the variety and development of the safe accident by using this model. This paper mainly introduced the basic theory of the gray prediction, firstly, a prediction model of the drill stem failure in deep well was set up with this theory, and then...
Methods currently used for predicting the measuring point in tracing and measurement are mostly based on the extrapolation technique, which extends the curve constructed from the measured points and the direction vector of the measuring point. This paper introduces grey prediction into the process of tracing and measurement for a CMM. In this method, both the coordinates and the direction vector can...
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