人民长江
人民長江
인민장강
YANGTZE RIVER
2015年
8期
61-63,70
,共4页
多元线性回归%Bernstein 多项式%RLS 算法%大坝安全监测
多元線性迴歸%Bernstein 多項式%RLS 算法%大壩安全鑑測
다원선성회귀%Bernstein 다항식%RLS 산법%대패안전감측
multiple linear regression%Bernstein polynomial%RLS algorithm%dam safety monitoring
多元线性回归模型(MLR)在大坝安全监测中应用广泛,但该模型的残差序列中存在着混沌现象,且在计算中没有对残差进行分析,因而影响了预测效果。采用基于 Bernstein 多项式的 RLS(递推最小二乘法)自适应预测算法,提出了 MLR-Bernstein 多项式模型,即利用 MLR 模型分离出各影响分量,再采用 RLS 自适应预测算法处理残差时间序列。结合泗南江水电站坝顶水平位移观测资料对模型进行检验,证明模型具有较高的预测精度,且能较好地反映实测值的波动。
多元線性迴歸模型(MLR)在大壩安全鑑測中應用廣汎,但該模型的殘差序列中存在著混沌現象,且在計算中沒有對殘差進行分析,因而影響瞭預測效果。採用基于 Bernstein 多項式的 RLS(遞推最小二乘法)自適應預測算法,提齣瞭 MLR-Bernstein 多項式模型,即利用 MLR 模型分離齣各影響分量,再採用 RLS 自適應預測算法處理殘差時間序列。結閤泗南江水電站壩頂水平位移觀測資料對模型進行檢驗,證明模型具有較高的預測精度,且能較好地反映實測值的波動。
다원선성회귀모형(MLR)재대패안전감측중응용엄범,단해모형적잔차서렬중존재착혼돈현상,차재계산중몰유대잔차진행분석,인이영향료예측효과。채용기우 Bernstein 다항식적 RLS(체추최소이승법)자괄응예측산법,제출료 MLR-Bernstein 다항식모형,즉이용 MLR 모형분리출각영향분량,재채용 RLS 자괄응예측산법처리잔차시간서렬。결합사남강수전참패정수평위이관측자료대모형진행검험,증명모형구유교고적예측정도,차능교호지반영실측치적파동。
The conventional Multiple Linear Regression model( MLR)is widely used in dam safety monitoring,but there is chaotic phenomena in residual series in this model,and the residual analysis is not implemented,which will affect the prediction accuracy. In this paper,a new MLR model combined with Bernstein polynomial was put forward by using RLS adaptive prediction algorithm that is based on Bernstein polynomial theory,namely it separates different influential components by MLR model,then uses RLS adaptive prediction algorithm to deal with the residual time series. Moreover,the model was validated by the observa-tion data of horizontal displacement of dam crest of Siˊnanjiang Hydropower Station. The validation results show that this model has higher prediction accuracy and can well reflect the actual value fluctuation.