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Using GM(1,1) with sample standard deviation to forecast downtrend rainfall for small sample in Khon Kaen, Thailand |
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| รหัสดีโอไอ | |
| Creator | 1. Mathee Pongkitwitoon 2. Watcharin Klongdee |
| Title | Using GM(1,1) with sample standard deviation to forecast downtrend rainfall for small sample in Khon Kaen, Thailand |
| Publisher | Faculty of Engineering, Khon Kaen University |
| Publication Year | 2559 |
| Journal Title | KKU Engineering Journal |
| Journal Vol. | 43 |
| Journal No. | S1 |
| Page no. | 111-113 |
| Keyword | GM(1,1), Sample standard deviation, Small sample, Rainfall forecasting, Downtrend forecasting |
| ISSN | 0125-8273 |
| Abstract | The objective of this research is to forecast the rainfall, Khon Kaen cumulative annual rainfall data, using GM(1,1) and Markov chain for small sample size based on sample standard deviation. We compare the accuracy of prediction models between this approachsdGM(1,1) and standard GM(1,1) in terms of MSE and PARE. We find that sdGM(1,1) is better than GM(1,1). |
