煤炭开采和洗选业年平均从业人数预测研究——基于灰色系统GM(1,1)模型

Prediction and Study on Annual Average Employee Number of Coal Mining and Coal Preparation Industry – base on Gray System GM (1.1) Model

把煤炭开采和洗选业年平均从业人数视为一个灰色系统。建立灰色GM(1,1)模型,对模型进行相对误差检验、灰色关联度检验、后验差检验、小误差概率检验、级比偏差检验,通过检验得到所建模型预测精度为一级。用此模型对"十二五"期间的年平均从业人数进行预测。

Taking the annual average employee number of the coal mining and coal preparation as a gray system, a gray GM （1.1） model was established. A relative error test, gray relevance test, post test error test, small error probability test and grade error test were conducted to the model. With the tests, the accuracy of the model established was one grade. The model was applied to the prediction of the annual average employee number during the ＂12th Five Year＂ period.