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| 引用本文： | 刘志平,何秀凤.??????????????????????α?????е????[J].大地测量与地球动力学,2008,28(1):41-44. |
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| 作者姓名： | 刘志平 何秀凤 |
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| 作者单位： | 河海大学卫星及空间信息应用研究所,南京,210098 |
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| 基金项目： | 国家自然科学基金(50579013)，国家自然科学基金重点项目(50539110)，江苏省研究生创新计划(CX07B_137z) |
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| 摘 要： | ???????????к???????????е????GM(1,M)?????????????????????????????????????????????????????????????????????????????????????????,????С??????????1??????????GM(1,M)???????????????????GM(1,1)?????GM(1,M)??
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| 关 键 词： | ?????? ?????? ??????? ????? ?α???? |
| 文章编号： | 1671-5942（2008）01-0041-04 |
| 收稿时间： | 2007-07-30 |
| 修稿时间： | 2007年7月30日 |
UNBIASED ESTIMATION OF EXTENDED GREY MODEL AND ITS APPLICATION TO FORECAST OF DEFORMATION OF STEEP SLOPES |
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| Liu Zhiping,He Xiufeng.UNBIASED ESTIMATION OF EXTENDED GREY MODEL AND ITS APPLICATION TO FORECAST OF DEFORMATION OF STEEP SLOPES[J].Journal of Geodesy and Geodynamics,2008,28(1):41-44. |
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| Authors: | Liu Zhiping He Xiufeng |
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| Institution: | Hohai University, Institute of Satellite Navigation &; Spatial Information System, Nanjing 210098 |
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| Abstract: | An unbiased estimation method based on original series and accumulated series for extended grey model (E-GM) is developed, and the formula is proposed for calculating maximum predictable time scale of grey model. Unbiased extended GM (UE-GM) has the characteristics of numerical stability, modeling objectivity and unbiased property. The steep slope engineering of Xiaowan Hydropower Station is studied as a case. The results show that the UE-GM (1, M) model is better than the U-GM (1, 1) and the E-GM (1, M) models in precision and reliability. |
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| Keywords: | grey model(GM) unbiased extended accumulated generating operation steep slope deformation prediction |
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