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云南省年均降雨量空间插值模拟方法比较 被引量:14
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作者 彭晓芬 黄甫则 周汝良 《西南林学院学报》 2010年第5期25-28,共4页
用反距离权重法、普通克里金法、基于样条函数法和回归模型计算法对云南省内134个气象站1993—2007年年均降雨量进行空间插值,将插值预测结果与检测点数据作对比分析,结果表明:4种插值法均能反映云南省内年均降雨量的空间分布特征,反距... 用反距离权重法、普通克里金法、基于样条函数法和回归模型计算法对云南省内134个气象站1993—2007年年均降雨量进行空间插值,将插值预测结果与检测点数据作对比分析,结果表明:4种插值法均能反映云南省内年均降雨量的空间分布特征,反距离权重法插值误差最小,精度最高,回归模型模拟插值误差较大,但能直观地反映年均降雨量随地理位置及海拔高度立体变化而变化的特征。 展开更多
关键词 空间插值 反距离权重法 回归模型计算 降雨
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New empirical model to evaluate groundwater flow into circular tunnel using multiple regression analysis 被引量:6
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作者 Farhadian Hadi Katibeh Homayoon 《International Journal of Mining Science and Technology》 SCIE EI CSCD 2017年第3期415-421,共7页
There are various analytical, empirical and numerical methods to calculate groundwater inflow into tun- nels excavated in rocky media. Analytical methods have been widely applied in prediction of groundwa- ter inflow ... There are various analytical, empirical and numerical methods to calculate groundwater inflow into tun- nels excavated in rocky media. Analytical methods have been widely applied in prediction of groundwa- ter inflow to tunnels due to their simplicity and practical base theory. Investigations show that the real amount of water infiltrating into jointed tunnels is much less than calculated amount using analytical methods and obtained results are very dependent on tunnel's geometry and environmental situations. In this study, using multiple regression analysis, a new empirical model for estimation of groundwater seepage into circular tunnels was introduced. Our data was acquired from field surveys and laboratory analysis of core samples. New regression variables were defined after perusing single and two variables relationship between groundwater seepage and other variables. Finally, an appropriate model for estima- tion of leakage was obtained using the stepwise algorithm. Statistics like R, R2, R2e and the histogram of residual values in the model represent a good reputation and fitness for this model to estimate the groundwater seepage into tunnels. The new experimental model was used for the test data and results were satisfactory. Therefore, multiple regression analysis is an effective and efficient way to estimate the groundwater seeoage into tunnels. 展开更多
关键词 Groundwater inflow Analytical equation Multiple regression analysis Stepwise algorithm Tunnel
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