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肯尼亚农户风险处理策略 被引量:1
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作者 王怀豫 丁世军 《世界农业》 北大核心 2003年第9期33-36,共4页
关键词 肯尼亚 农户 类别 特点 风险处理策略 农业生产策略 农产品交易策略 家庭经营活动策略 短工策略 乞讨策略 借贷策略 固定工作策略
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Study on Control Strategy of Sulfur Dioxide Concentration in the Urban Area of Shijiazhuang
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作者 李光军 于立军 +2 位作者 范丽 王宇新 赵根喜 《Transactions of Tianjin University》 EI CAS 2003年第3期247-251,共5页
Two Gaussian air quality dispersion models, the industrial source complex short-term model (ISCST3) with and without modification have been used to simulate the pollutant concentration distribution in urban areas base... Two Gaussian air quality dispersion models, the industrial source complex short-term model (ISCST3) with and without modification have been used to simulate the pollutant concentration distribution in urban areas based on the meteorological data and the emissions distribution of sulfur dioxide. The verified data show that the modified model is more accurate in the urban area of Shijiazhuang. Using the modified model predictions, the control strategies of sulfur dioxide in the urban area have been studied, and the result show that the second long-term (to 2010) strategy can mitigate air pollution significantly and maintain pollution levels within permissible limits. 展开更多
关键词 air quality industrial source complex short-term model (ISCST3) sulfur dioxide control strategy
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