Urban flooding has impacted siginficantly on people＇s living： economic development, environmental pollution, etc.. It has been the serious problem of many cities in file world, especially in urban areas in developin...Urban flooding has impacted siginficantly on people＇s living： economic development, environmental pollution, etc.. It has been the serious problem of many cities in file world, especially in urban areas in developing countries because urbanization is too fast but lack of adaptive management planning and infrastructure. In Vietnam, the big cities, such as HCM （Ho Chi Minh） City, Hanoi, etc. have also been influenced severely by floods. By early 2017, HCM City has 171 flooded sites assigned by the district level; 40 submergence points assigned by Steering Center of Flooding Control Program, and 9 tidal flooded points. The paper will establish a suitable method for assessing flood vulnerability in HCM City from natural, social and environmental aspects. The results of a case study in District 6 show that there are four wards with high vulnerability and 10 wards with average vulnerability.展开更多
In this study,the authors introduce a new bogus data assimilation method based on the dimension-reduced projection 4-DVar,which can resolve the cost function directly in low-dimensional space.The authors also try a ne...In this study,the authors introduce a new bogus data assimilation method based on the dimension-reduced projection 4-DVar,which can resolve the cost function directly in low-dimensional space.The authors also try a new method to improve the quality of samples,which are the base of dimension-reduced space projection bogus data assimilation (DRP-BDA).By running a number of numerical weather models with different model parameterization combinations on the typhoon Sinlaku,the authors obtained two groups of samples with different spreads and similarities.After DRP-BDA,the results show that,compared with the control runs,the simulated typhoon center pressure can be deepened by more than 20 hPa to 30 hPa and that the intensity can last as long as 60 hours.The mean track error is improved after DRP-BDA,and the structure of the typhoon is also improved.The wind near the typhoon center is enhanced dramatically,while the warm core is moderate.展开更多
This paper tries to apply a new and more comprehensive method to urban tourism research in an expanded field instead of only partially, unilaterally and separately focusing on the city itself. Taking the urban tourism...This paper tries to apply a new and more comprehensive method to urban tourism research in an expanded field instead of only partially, unilaterally and separately focusing on the city itself. Taking the urban tourism of Guangdong, Hong Kong and Macao as an example, it aims at presenting a new spatial system of urban tourism research and pointing out the new orientation of urban tourism research in combination of macro level and micro level, from description to explanation. The meanings of the spatial framework construction for urban tourism study are to make clear how urban tourism studies vary with the changes of dimensions of time and space. This is a meaningful discussion because it will bring great changes to the using of literatures, the opening of research perspectives on urban tourism and the upgrading of theories, so as to create a new stage for urban tourism study.展开更多
The distribution of the final surface subsidence basin induced by longwall operations in inclined coal seam could be significantly different from that in flat coal seam and demands special prediction methods. Though m...The distribution of the final surface subsidence basin induced by longwall operations in inclined coal seam could be significantly different from that in flat coal seam and demands special prediction methods. Though many empirical prediction methods have been developed, these methods are inflexible for varying geological and mining conditions. An influence function method has been developed to take the advantage of its fundamentally sound nature and flexibility. In developing this method, significant modifications have been made to the original Knothe function to produce an asymmetrical influence function. The empirical equations for final subsidence parameters derived from US subsidence data and Chinese empirical values have been incorpo- rated into the mathematical models to improve the prediction accuracy. A corresponding computer program is developed. A number of subsidence cases for longwall mining operations in coal seams with varying inclination angles have been used to demonstrate the applicability of the developed subsidence prediction model.展开更多
We find ourselves at the end of a national election season, one cycling through a particularly depressed economic situation, but Americans, a generally hopeful, forward looking lot have become accustomed to growing in...We find ourselves at the end of a national election season, one cycling through a particularly depressed economic situation, but Americans, a generally hopeful, forward looking lot have become accustomed to growing incivility and resentment in their politics. This resentment stems from what Albert Borgmann defines as the character of our late modern age--we are both sullen and hyper in our daily lives. This situation comes at the intersection of long developing modern elements stemming from the control of nature via a universal scientific method at the behest of our own aggressive pursuit of individuality. The nature of our lives are in turn reinforced and reproduced by our frenetic militarized mobilization to recapture political and economic leadership at an international level. This goal, spurred on by an elite oligarchical vanguard, is reinforced by a ＂wealth defense industry,＂ developed in the late 20th century, designed to protect the wealth of our own elite class. This industry has stripped traditional cultural and academic sites of their ability or interest in interrogating the present status quo, and has rendered them fiat, uninspiring, and indolent in the face of growing income inequities and injustice. American political science has essentially become, in the vein of Marita Sturken＇s work, kitschified--facile, glib, and easily reproduced so as to act as a balm to our bruised, sullen egos, longing for an age of innocence-a smooth and glassy yet opaque history that eases our consciences and forgives the growing antidemocratic practices of our civil oligarchy.展开更多
文摘Urban flooding has impacted siginficantly on people＇s living： economic development, environmental pollution, etc.. It has been the serious problem of many cities in file world, especially in urban areas in developing countries because urbanization is too fast but lack of adaptive management planning and infrastructure. In Vietnam, the big cities, such as HCM （Ho Chi Minh） City, Hanoi, etc. have also been influenced severely by floods. By early 2017, HCM City has 171 flooded sites assigned by the district level; 40 submergence points assigned by Steering Center of Flooding Control Program, and 9 tidal flooded points. The paper will establish a suitable method for assessing flood vulnerability in HCM City from natural, social and environmental aspects. The results of a case study in District 6 show that there are four wards with high vulnerability and 10 wards with average vulnerability.
基金the Ministry of Finance of China and the China Meteorological Administration for the Special Project of Meteorological Sector (Grant No. GYHY(QX)200906009)the National Natural Science Foundation of China for the innovation group project (Grant No.40821092)
文摘In this study,the authors introduce a new bogus data assimilation method based on the dimension-reduced projection 4-DVar,which can resolve the cost function directly in low-dimensional space.The authors also try a new method to improve the quality of samples,which are the base of dimension-reduced space projection bogus data assimilation (DRP-BDA).By running a number of numerical weather models with different model parameterization combinations on the typhoon Sinlaku,the authors obtained two groups of samples with different spreads and similarities.After DRP-BDA,the results show that,compared with the control runs,the simulated typhoon center pressure can be deepened by more than 20 hPa to 30 hPa and that the intensity can last as long as 60 hours.The mean track error is improved after DRP-BDA,and the structure of the typhoon is also improved.The wind near the typhoon center is enhanced dramatically,while the warm core is moderate.
基金Under the auspices of the National Natural Science Foundation of China (No .40201017)
文摘This paper tries to apply a new and more comprehensive method to urban tourism research in an expanded field instead of only partially, unilaterally and separately focusing on the city itself. Taking the urban tourism of Guangdong, Hong Kong and Macao as an example, it aims at presenting a new spatial system of urban tourism research and pointing out the new orientation of urban tourism research in combination of macro level and micro level, from description to explanation. The meanings of the spatial framework construction for urban tourism study are to make clear how urban tourism studies vary with the changes of dimensions of time and space. This is a meaningful discussion because it will bring great changes to the using of literatures, the opening of research perspectives on urban tourism and the upgrading of theories, so as to create a new stage for urban tourism study.
文摘The distribution of the final surface subsidence basin induced by longwall operations in inclined coal seam could be significantly different from that in flat coal seam and demands special prediction methods. Though many empirical prediction methods have been developed, these methods are inflexible for varying geological and mining conditions. An influence function method has been developed to take the advantage of its fundamentally sound nature and flexibility. In developing this method, significant modifications have been made to the original Knothe function to produce an asymmetrical influence function. The empirical equations for final subsidence parameters derived from US subsidence data and Chinese empirical values have been incorpo- rated into the mathematical models to improve the prediction accuracy. A corresponding computer program is developed. A number of subsidence cases for longwall mining operations in coal seams with varying inclination angles have been used to demonstrate the applicability of the developed subsidence prediction model.
文摘We find ourselves at the end of a national election season, one cycling through a particularly depressed economic situation, but Americans, a generally hopeful, forward looking lot have become accustomed to growing incivility and resentment in their politics. This resentment stems from what Albert Borgmann defines as the character of our late modern age--we are both sullen and hyper in our daily lives. This situation comes at the intersection of long developing modern elements stemming from the control of nature via a universal scientific method at the behest of our own aggressive pursuit of individuality. The nature of our lives are in turn reinforced and reproduced by our frenetic militarized mobilization to recapture political and economic leadership at an international level. This goal, spurred on by an elite oligarchical vanguard, is reinforced by a ＂wealth defense industry,＂ developed in the late 20th century, designed to protect the wealth of our own elite class. This industry has stripped traditional cultural and academic sites of their ability or interest in interrogating the present status quo, and has rendered them fiat, uninspiring, and indolent in the face of growing income inequities and injustice. American political science has essentially become, in the vein of Marita Sturken＇s work, kitschified--facile, glib, and easily reproduced so as to act as a balm to our bruised, sullen egos, longing for an age of innocence-a smooth and glassy yet opaque history that eases our consciences and forgives the growing antidemocratic practices of our civil oligarchy.
