灰色数列预测模型是根据过去和现实的信息建模预测将来的情况，提出事物发展变化规律。与其它模型相比较，它具有不受原始数据的约束．实用性强，预测性能好，尤其对近期数预测效果较为满意。l资料来西与方法以张掖某中学1991～1994年间学生近视率为原始资料，建立数学模型，预 Gray sequence forecasting model predicts the future situation based on past and actual information modeling and puts forward the law of the development of things. Compared with other models, it has no constraints from the original data. Practicality, good predictive performance, especially for the recent number of predictions more satisfied. l data to the west and methods Zhangye secondary school students from 1991 to 1994 myopia as the original data, the establishment of mathematical models, pre