Spontaneous combustion is one of the greatest disasters in coal mines. Early recognition is important because it may be a potential inducement for other coalmine accidents. However, early recognition is difficult beca...Spontaneous combustion is one of the greatest disasters in coal mines. Early recognition is important because it may be a potential inducement for other coalmine accidents. However, early recognition is difficult because of the complexity of different coal mines. Fuzzy clustering has been proposed to incorporate the uncertainty of spontaneous combustion in coal mines and it can give a clear degree of classification of combustion. Because FCM clustering tends to become trapped in local minima, a new approach of fuzzy c-means clustering based on a genetic algorithm is there- fore proposed. Genetic algorithm is capable of locating optimal or near optimal solutions to difficult problems. It can be applied in many fields without first obtaining detailed knowledge about correlation. It is helpful in improving the effec- tiveness of fuzzy clustering in detecting spontaneous combustion. The effectiveness of the method is demonstrated by means of an experiment.展开更多
Over the last 30 years, environmental philosophers and ecological researchers have turned their attention to the possibilities of narratives： the stories people tell about their lives in conjunction with the human an...Over the last 30 years, environmental philosophers and ecological researchers have turned their attention to the possibilities of narratives： the stories people tell about their lives in conjunction with the human and non-human agents they live with. An interest in narrative environmental ethics reflects a re-evaluation of canonical ecophilosophical texts. Works such as Paul W. Taylor＇s Respect for Nature suggest an essentialist view of environmental ethics in which predetermined principles are imposed on places and situations. On the other hand, Aldo Leopold＇s A Sand County Almanac combines first-person prose with science-based explanations of the ＂biotic pyramid＂ towards the development of a land ethic. Examples, such as Leopold＇s, of narrative ethics are thought to offer relational, place-based, non-authoritative, and non-anthropocentric models. This article examines three critical components of environmental narratives： self, context, and tradition. In order for environmental narratives to advance ecological ethics, they must be accompanied by the tradition of natural science （geology, ecology, and evolution） to provide the ＂sponsoring ground＂ for ethical concern and action. The role of natural science as a tradition--and indeed one of many--in narrative ethics provides the basis for ecological selfhood in the context of place. These assertions will be supported by an analysis of the environmental narratives of Karen Warren and Jim Cheney. However, in the temporally expansive and ecologically conscious poetic narratives of John Kinsella we find an environmental ethics deeply rooted in the material realities of place.展开更多
基金Project 20050290010 supported by the Doctoral Foundation of Chinese Education Ministry
文摘Spontaneous combustion is one of the greatest disasters in coal mines. Early recognition is important because it may be a potential inducement for other coalmine accidents. However, early recognition is difficult because of the complexity of different coal mines. Fuzzy clustering has been proposed to incorporate the uncertainty of spontaneous combustion in coal mines and it can give a clear degree of classification of combustion. Because FCM clustering tends to become trapped in local minima, a new approach of fuzzy c-means clustering based on a genetic algorithm is there- fore proposed. Genetic algorithm is capable of locating optimal or near optimal solutions to difficult problems. It can be applied in many fields without first obtaining detailed knowledge about correlation. It is helpful in improving the effec- tiveness of fuzzy clustering in detecting spontaneous combustion. The effectiveness of the method is demonstrated by means of an experiment.
文摘Over the last 30 years, environmental philosophers and ecological researchers have turned their attention to the possibilities of narratives： the stories people tell about their lives in conjunction with the human and non-human agents they live with. An interest in narrative environmental ethics reflects a re-evaluation of canonical ecophilosophical texts. Works such as Paul W. Taylor＇s Respect for Nature suggest an essentialist view of environmental ethics in which predetermined principles are imposed on places and situations. On the other hand, Aldo Leopold＇s A Sand County Almanac combines first-person prose with science-based explanations of the ＂biotic pyramid＂ towards the development of a land ethic. Examples, such as Leopold＇s, of narrative ethics are thought to offer relational, place-based, non-authoritative, and non-anthropocentric models. This article examines three critical components of environmental narratives： self, context, and tradition. In order for environmental narratives to advance ecological ethics, they must be accompanied by the tradition of natural science （geology, ecology, and evolution） to provide the ＂sponsoring ground＂ for ethical concern and action. The role of natural science as a tradition--and indeed one of many--in narrative ethics provides the basis for ecological selfhood in the context of place. These assertions will be supported by an analysis of the environmental narratives of Karen Warren and Jim Cheney. However, in the temporally expansive and ecologically conscious poetic narratives of John Kinsella we find an environmental ethics deeply rooted in the material realities of place.
