Urbanization has been a worldwide development trend,which regulates river courses,impervious surfaces and drainage systems.Urbanization causes hydrological effects,including increased runoff volumes,peak discharges an...Urbanization has been a worldwide development trend,which regulates river courses,impervious surfaces and drainage systems.Urbanization causes hydrological effects,including increased runoff volumes,peak discharges and flow concentrations.This manuscript selects the Malaysian Sungai Pinang watershed as a case study to illustrate these land use,channel and flooding changes of Asian coastal cities.The Landsat satellite remote sensing images were first used to estimate the land use/land cover changes of the Sungai Pinang watershed by using SVM algorithm,and the results shows the urbanization was very rapid in the past decades,with the urbanization rate reached 46.41%in 2018 based on the build area rate.River channel characteristics also changed significantly,from natural river to concrete channel.Some flood resilience measures for coastal cities experiencing urbanization are also proposed for development and flood mitigation.Moreover,a flood forecasting model of the Sungai Pinang watershed is established herein.The simulation results of the Liuxihe model constructed in this study conforms to hydrological regularities and can provide a technical reference for flood control and disaster reduction.However,it is necessary to pay attention to the uncertainty of the forecast results.展开更多
以槟榔芋为原料,通过单因素试验分别探讨酶添加量、酶解时间、酶解温度和水料比对麦芽糊精葡萄糖值(DE值)的影响,从而确定各因素的适宜水平,进一步利用正交试验优化制备工艺参数。结果表明:槟榔芋麦芽糊精的最佳制备条件为:酶添加量6.33...以槟榔芋为原料,通过单因素试验分别探讨酶添加量、酶解时间、酶解温度和水料比对麦芽糊精葡萄糖值(DE值)的影响,从而确定各因素的适宜水平,进一步利用正交试验优化制备工艺参数。结果表明:槟榔芋麦芽糊精的最佳制备条件为:酶添加量6.33 U/g,酶解时间12 min,酶解温度85℃,水料比3 m L/g,在此条件下,制备的麦芽糊精DE值为19.24。展开更多
George Town is a significant World Heritage Site in the Straits of Malacca.This paper examined the evolution of urban morphology in George Town within geography,politics,economy,and culture in a horizontal dimension a...George Town is a significant World Heritage Site in the Straits of Malacca.This paper examined the evolution of urban morphology in George Town within geography,politics,economy,and culture in a horizontal dimension and layer upon layer in a vertical dimension.In this study,to ensure the objectives are achieved,qualitative methods will be applied including several approaches such as literature review,interpretation of archives chronologically,maps study,census returns,trade directories,photographs and postcards,and urban master plan study.The research is based on the analysis of urban construction,land use,economic development,and municipal policies.First,study the urban morphology in a specific period,and construct the inner layer structure in each period.Second,an analogy is drawn among the evolution of the urban morphology by time-scale,this section focusses on the historical conjunctures and events related to the urban construction.An important contribution can be made to the conservation and management of urban built heritage in George Town,on the one hand,explaining the evolution of urban morphology by examining George Tow nphysical and spatial environment,and in turn,on the other hand,understanding about the physical and spatial environment by examining the urban morphology.展开更多
基金supported by the National Key Research and Development Program of China(funding no.2017YFC1502702)
文摘Urbanization has been a worldwide development trend,which regulates river courses,impervious surfaces and drainage systems.Urbanization causes hydrological effects,including increased runoff volumes,peak discharges and flow concentrations.This manuscript selects the Malaysian Sungai Pinang watershed as a case study to illustrate these land use,channel and flooding changes of Asian coastal cities.The Landsat satellite remote sensing images were first used to estimate the land use/land cover changes of the Sungai Pinang watershed by using SVM algorithm,and the results shows the urbanization was very rapid in the past decades,with the urbanization rate reached 46.41%in 2018 based on the build area rate.River channel characteristics also changed significantly,from natural river to concrete channel.Some flood resilience measures for coastal cities experiencing urbanization are also proposed for development and flood mitigation.Moreover,a flood forecasting model of the Sungai Pinang watershed is established herein.The simulation results of the Liuxihe model constructed in this study conforms to hydrological regularities and can provide a technical reference for flood control and disaster reduction.However,it is necessary to pay attention to the uncertainty of the forecast results.
文摘以槟榔芋为原料,通过单因素试验分别探讨酶添加量、酶解时间、酶解温度和水料比对麦芽糊精葡萄糖值(DE值)的影响,从而确定各因素的适宜水平,进一步利用正交试验优化制备工艺参数。结果表明:槟榔芋麦芽糊精的最佳制备条件为:酶添加量6.33 U/g,酶解时间12 min,酶解温度85℃,水料比3 m L/g,在此条件下,制备的麦芽糊精DE值为19.24。
文摘George Town is a significant World Heritage Site in the Straits of Malacca.This paper examined the evolution of urban morphology in George Town within geography,politics,economy,and culture in a horizontal dimension and layer upon layer in a vertical dimension.In this study,to ensure the objectives are achieved,qualitative methods will be applied including several approaches such as literature review,interpretation of archives chronologically,maps study,census returns,trade directories,photographs and postcards,and urban master plan study.The research is based on the analysis of urban construction,land use,economic development,and municipal policies.First,study the urban morphology in a specific period,and construct the inner layer structure in each period.Second,an analogy is drawn among the evolution of the urban morphology by time-scale,this section focusses on the historical conjunctures and events related to the urban construction.An important contribution can be made to the conservation and management of urban built heritage in George Town,on the one hand,explaining the evolution of urban morphology by examining George Tow nphysical and spatial environment,and in turn,on the other hand,understanding about the physical and spatial environment by examining the urban morphology.
