With rapid environmental degeneration and socio-economie development,the human settlement environment (HSE)has experienced dramatic changes and attracted attention from different communities.Consequently,the spatial-t...With rapid environmental degeneration and socio-economie development,the human settlement environment (HSE)has experienced dramatic changes and attracted attention from different communities.Consequently,the spatial-temporal evaluation of natural suitability of the human settlement environment (NSHSE)has become essential for understanding the patterns and dynamics of HSE,and for coordinating sustainable development among regional populations,resources,and environments.This study aims to explore the spatialtemporal evolution of NSHSE patterns in 1997,2005,and 2009 in Fengjie County near the Three Gorges Reservoir Area (TGRA).A spatially weighted NSHSE model was established by integrating multi-source data (e.g.,census data,meteorological data,remote sensing images,DEM data,and GIS data)into one framework,where the Ordinary Least Squares (OLS)linear regression model was applied to calculate the weights of indices in the NSHSE model.Results show that the trend of natural suitability has been first downward and then upward, which is evidenced by the disparity of NSHSE existing in the south,north,and central areas of Fengjie County. Results also reveal clustered NSHSE patterns for all 30 townships.Meanwhile,NSHSE has significant influence on population distribution,and 71.49% of the total population is living in moderate and high suitable districts.展开更多
Since the mathematical model of linear flow in a double-porosity system was proposed by Barenblatt et al. in the early 60s, studies on nonsteady flow of slightly compressible homogeneous liquid in fractured medium mar...Since the mathematical model of linear flow in a double-porosity system was proposed by Barenblatt et al. in the early 60s, studies on nonsteady flow of slightly compressible homogeneous liquid in fractured medium marched mainly along the Barenblatt’s model lines. Undoubtedly, these results have theoretical and practical significance for the exploitation of fractured reservoirs. But, in pace with the展开更多
To infuse water into oil reservoir by a high-pressure pump to let oil residuum issue out of oil wells is a problem of two-phase immiscible flow displacement. J. Douglas and D. W. Peaceman proposed a finite-difference ...To infuse water into oil reservoir by a high-pressure pump to let oil residuum issue out of oil wells is a problem of two-phase immiscible flow displacement. J. Douglas and D. W. Peaceman proposed a finite-difference numerical solution of this problem in 1959. Though the numerical simulation has begun, the complete theoretical analysis is seldom reported. In this paper we propose the展开更多
文摘With rapid environmental degeneration and socio-economie development,the human settlement environment (HSE)has experienced dramatic changes and attracted attention from different communities.Consequently,the spatial-temporal evaluation of natural suitability of the human settlement environment (NSHSE)has become essential for understanding the patterns and dynamics of HSE,and for coordinating sustainable development among regional populations,resources,and environments.This study aims to explore the spatialtemporal evolution of NSHSE patterns in 1997,2005,and 2009 in Fengjie County near the Three Gorges Reservoir Area (TGRA).A spatially weighted NSHSE model was established by integrating multi-source data (e.g.,census data,meteorological data,remote sensing images,DEM data,and GIS data)into one framework,where the Ordinary Least Squares (OLS)linear regression model was applied to calculate the weights of indices in the NSHSE model.Results show that the trend of natural suitability has been first downward and then upward, which is evidenced by the disparity of NSHSE existing in the south,north,and central areas of Fengjie County. Results also reveal clustered NSHSE patterns for all 30 townships.Meanwhile,NSHSE has significant influence on population distribution,and 71.49% of the total population is living in moderate and high suitable districts.
文摘Since the mathematical model of linear flow in a double-porosity system was proposed by Barenblatt et al. in the early 60s, studies on nonsteady flow of slightly compressible homogeneous liquid in fractured medium marched mainly along the Barenblatt’s model lines. Undoubtedly, these results have theoretical and practical significance for the exploitation of fractured reservoirs. But, in pace with the
文摘To infuse water into oil reservoir by a high-pressure pump to let oil residuum issue out of oil wells is a problem of two-phase immiscible flow displacement. J. Douglas and D. W. Peaceman proposed a finite-difference numerical solution of this problem in 1959. Though the numerical simulation has begun, the complete theoretical analysis is seldom reported. In this paper we propose the
