灰色馬爾可夫組合預測模型的改進與應用
[Abstract]:In this paper, the grey Markov prediction model is taken as the research object, combining the grey system theory and Markov chain theory, the idea of metabolism and weight is added to the grey Markov prediction model, and the grey Markov prediction model is improved. The data are analyzed. The grey prediction model takes a small amount of data information as the research object, the principle is simple, the operation is convenient, the model has good prediction precision for the small amount of information modeling. Markov prediction model is suitable for random processes with large data fluctuation, and the objects predicted by the model require Markov property. Firstly, the two models are combined to form the grey Markov prediction model. The grey prediction model is used to reflect the general trend of the development of the data series, and the Markov model is used to predict the data on the basis of the trend processing. It is hoped that the prediction accuracy can be improved by giving full play to their respective advantages, but the prediction results are not satisfactory through examples. Therefore, a weighted method based on genetic algorithm is proposed in this paper. The grey Markov prediction model is improved and the weighted grey Markov prediction model is established on the basis of metabolism. The case study shows that the prediction of precipitation by the improved model and the improved model is related to the state of the original data partition, and the improved model has better prediction effect under the same state partition.
【學位授予單位】:西安建筑科技大學
【學位級別】:碩士
【學位授予年份】:2017
【分類號】:O211.62
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