This study used spatial autoregression(SAR)model and geographically weighted regression(GWR)model to model the spatial patterns of farmland density and its temporal change in Gucheng County,Hubei Province,China in 199...This study used spatial autoregression(SAR)model and geographically weighted regression(GWR)model to model the spatial patterns of farmland density and its temporal change in Gucheng County,Hubei Province,China in 1999 and 2009,and discussed the difference between global and local spatial autocorrelations in terms of spatial heterogeneity and non-stationarity.Results showed that strong spatial positive correlations existed in the spatial distributions of farmland density,its temporal change and the driving factors,and the coefficients of spatial autocorrelations decreased as the spatial lag distance increased.SAR models revealed the global spatial relations between dependent and independent variables,while the GWR model showed the spatially varying fitting degree and local weighting coefficients of driving factors and farmland indices(i.e.,farmland density and temporal change).The GWR model has smooth process when constructing the farmland spatial model.The coefficients of GWR model can show the accurate influence degrees of different driving factors on the farmland at different geographical locations.The performance indices of GWR model showed that GWR model produced more accurate simulation results than other models at different times,and the improvement precision of GWR model was obvious.The global and local farmland models used in this study showed different characteristics in the spatial distributions of farmland indices at different scales,which may provide the theoretical basis for farmland protection from the influence of different driving factors.展开更多
目的分析头孢曲松钠不良反应的特点,为临床安全用药提供参考。方法分析2016年1-12月西安市不良反应中心收集的162例头孢曲松钠的不良反应报告,总结其不良反应的发生规律。结果头孢曲松钠不良反应发生时间<10 min 38例(23.46%),1 h以...目的分析头孢曲松钠不良反应的特点,为临床安全用药提供参考。方法分析2016年1-12月西安市不良反应中心收集的162例头孢曲松钠的不良反应报告,总结其不良反应的发生规律。结果头孢曲松钠不良反应发生时间<10 min 38例(23.46%),1 h以内61例(37.65%),24 h内40例(24.69%),>24 h 18例(11.11%),未写明时间5例(3.09%)。累及系统主要为皮肤及附件124例(76.54%),其次是消化系统10例(6.17%)。结论头孢曲松钠引发的不良反应多在用药后1 h内发生,多见皮肤过敏反应、静脉炎及消化系统症状,用药后1 h应密切观察,鉴别药品不良反应,及时采取相应措施。展开更多
基金Under the auspices of National Natural Science Foundation of China(No.40601073,41101192,41201571)Fundamental Research Funds for the Central Universities(No.2011PY112,2011QC041,2011QC091)Huazhong Agricultural University Scientific&Technological Self-innovation Foundation(No.2011SC21)
文摘This study used spatial autoregression(SAR)model and geographically weighted regression(GWR)model to model the spatial patterns of farmland density and its temporal change in Gucheng County,Hubei Province,China in 1999 and 2009,and discussed the difference between global and local spatial autocorrelations in terms of spatial heterogeneity and non-stationarity.Results showed that strong spatial positive correlations existed in the spatial distributions of farmland density,its temporal change and the driving factors,and the coefficients of spatial autocorrelations decreased as the spatial lag distance increased.SAR models revealed the global spatial relations between dependent and independent variables,while the GWR model showed the spatially varying fitting degree and local weighting coefficients of driving factors and farmland indices(i.e.,farmland density and temporal change).The GWR model has smooth process when constructing the farmland spatial model.The coefficients of GWR model can show the accurate influence degrees of different driving factors on the farmland at different geographical locations.The performance indices of GWR model showed that GWR model produced more accurate simulation results than other models at different times,and the improvement precision of GWR model was obvious.The global and local farmland models used in this study showed different characteristics in the spatial distributions of farmland indices at different scales,which may provide the theoretical basis for farmland protection from the influence of different driving factors.
文摘目的分析头孢曲松钠不良反应的特点,为临床安全用药提供参考。方法分析2016年1-12月西安市不良反应中心收集的162例头孢曲松钠的不良反应报告,总结其不良反应的发生规律。结果头孢曲松钠不良反应发生时间<10 min 38例(23.46%),1 h以内61例(37.65%),24 h内40例(24.69%),>24 h 18例(11.11%),未写明时间5例(3.09%)。累及系统主要为皮肤及附件124例(76.54%),其次是消化系统10例(6.17%)。结论头孢曲松钠引发的不良反应多在用药后1 h内发生,多见皮肤过敏反应、静脉炎及消化系统症状,用药后1 h应密切观察,鉴别药品不良反应,及时采取相应措施。
