Integration of Grey with Neural Network Model and Its Application in Data Mining

<span style="font-size: 10pt; font-family: "Times New Roman"; mso-fareast-font-family: 宋体; mso-fareast-language: EN-US; mso-ansi-language: EN-US; mso-bidi-language: AR-SA;" lang="EN-US">Because of Boundary types and geologic conditions, which possess random and obscure characteristics, groundwater heads vary with the conditions. The prediction of groundwater level is one of the main work of hydraulic government, which is predicted based on the history data and the relative influence factors. Therefore, prediction precision depends on the accuracy of history data. Data mining has provided a new method for analyzing massive, complex and noisy data. According to the complexity and ambiguity of groundwater system, a new </span><span style="font-size: 10pt; font-family: "Times New Roman"; mso-fareast-font-family: 宋体; mso-fareast-language: ZH-CN; mso-ansi-language: EN-US; mso-bidi-language: AR-SA;" lang="EN-US">integration</span><span style="font-size: 10pt; font-family: "Times New Roman"; mso-fareast-font-family: 宋体; mso-fareast-language: EN-US; mso-ansi-language: EN-US; mso-bidi-language: AR-SA;" lang="EN-US"> </span><span style="font-size: 10pt; font-family: "Times New Roman"; mso-fareast-font-family: 宋体; mso-fareast-language: ZH-CN; mso-ansi-language: EN-US; mso-bidi-language: AR-SA;" lang="EN-US">of </span><span style="font-size: 10pt; font-family: "Times New Roman"; mso-fareast-font-family: 宋体; mso-fareast-language: EN-US; mso-ansi-language: EN-US; mso-bidi-language: AR-SA;" lang="EN-US">grey </span><span style="font-size: 10pt; font-family: "Times New Roman"; mso-fareast-font-family: 宋体; mso-fareast-language: ZH-CN; mso-ansi-language: EN-US; mso-bidi-language: AR-SA;" lang="EN-US">with </span><span style="font-size: 10pt; font-family: "Times New Roman"; mso-fareast-font-family: 宋体; mso-fareast-language: EN-US; mso-ansi-language: EN-US; mso-bidi-language: AR-SA;" lang="EN-US">neural network </span><span style="font-size: 10pt; font-family: "Times New Roman"; mso-fareast-font-family: 宋体; mso-fareast-language: ZH-CN; mso-ansi-language: EN-US; mso-bidi-language: AR-SA;" lang="EN-US">model </span><span style="font-size: 10pt; font-family: "Times New Roman"; mso-fareast-font-family: 宋体; mso-fareast-language: EN-US; mso-ansi-language: EN-US; mso-bidi-language: AR-SA;" lang="EN-US">is </span><span style="font-size: 10pt; font-family: "Times New Roman"; mso-fareast-font-family: 宋体; mso-fareast-language: ZH-CN; mso-ansi-language: EN-US; mso-bidi-language: AR-SA;" lang="EN-US">built to forecast groundwater heads, which were used to judge whether future groundwater heads were extraordinarily over the history range or not. </span><span style="font-size: 10pt; font-family: "Times New Roman"; mso-fareast-font-family: 宋体; mso-fareast-language: EN-US; mso-ansi-language: EN-US; mso-bidi-language: AR-SA;" lang="EN-US"><span style="mso-spacerun: yes;">&nbsp;</span></span><span style="font-size: 10pt; font-family: "Times New Roman"; mso-fareast-font-family: 宋体; mso-fareast-language: ZH-CN; mso-ansi-language: EN-US; mso-bidi-language: AR-SA;" lang="EN-US">This method overcomes the disadvantages which the grey method only predict the linear trend. </span><span style="font-size: 10pt; font-family: "Times New Roman"; mso-fareast-font-family: 宋体; mso-fareast-language: EN-US; mso-ansi-language: EN-US; mso-bidi-language: AR-SA;" lang="EN-US">The </span><span style="font-size: 10pt; font-family: "Times New Roman"; mso-fareast-font-family: 宋体; mso-fareast-language: ZH-CN; mso-ansi-language: EN-US; mso-bidi-language: AR-SA;" lang="EN-US">methods were used to analyze the random characteristics of groundwater heads in anyang city</span><span style="font-size: 10pt; font-family: "Times New Roman"; mso-fareast-font-family: 宋体; mso-fareast-language: EN-US; mso-ansi-language: EN-US; mso-bidi-language: AR-SA;" lang="EN-US">.</span><span style="font-size: 10pt; font-family: "Times New Roman"; mso-fareast-font-family: 宋体; mso-fareast-language: ZH-CN; mso-ansi-language: EN-US; mso-bidi-language: AR-SA;" lang="EN-US"> The results indicate that the method is reliable, and reasonable</span>