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A Quantitative Analysis on Grassland Animal Husbandry of Sichuan Tibetan Region after the Liberation
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作者 SU Yong-jie 《Animal Husbandry and Feed Science》 CAS 2011年第2期4-7,41,共5页
[ Objective ] To study economic growth of grassland animal husbandry in Sichuan Tibetan region after the liberation and predict long-term trend and regular features of growth and development of grassland animal husban... [ Objective ] To study economic growth of grassland animal husbandry in Sichuan Tibetan region after the liberation and predict long-term trend and regular features of growth and development of grassland animal husbandry. [ Method] Using econometric models and methods, the gov- ernment statistical data after the liberation on grassland animal husbandry of Sichuan Tibetan region were analyzed, and the factors increasing econ- omy of grassland animal husbandry were determined by analyzing time series data of different periods. [ Result] The grassland animal husbandry of Sichuan Tibetan region had significant characteristics of traditional pastoral economy. Before the reform and opening-up, the increase of animal hus- bandry economy was mainly manifested by increase in amount of livestock and laborers, and the increase in amount of livestock was principal pro- moting factor. After the reform and opening-up, the increase in integrated production factors became the primary cause to push the increase of ani- mal husbandry economy. [ Conclusion] Some new measures must be taken to promote the increase of animal husbandry economy of Sichuan Tibetan region, including transforming traditional production mode of animal husbandry, relying on scientific and technological advances, further improving socio- economic system, cultivating more highly sldlled workforce and effectively guiding rational shift and orderly migration of surplus pasture laborers. 展开更多
关键词 Sichuan Tibetan region Grassland animal husbandry model of growth Quantitative analysis
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纳米金属微粒催化制备的洋葱状富勒烯的结构表征 被引量:18
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作者 王晓敏 许并社 +1 位作者 刘旭光 市野濑英喜 《新型炭材料》 SCIE EI CAS CSCD 2004年第3期209-213,共5页
 采用金属Cu,Al微粒 石墨混合材料,用直流电弧放电方法制备了洋葱状富勒烯。对两种产物进行了XRD、SEM、HRTEM和Raman结构表征。结果表明:两种纳米金属微粒均可催化得到洋葱状富勒烯;所得产物中有单纯洋葱状富勒烯和内包纳米金属微粒...  采用金属Cu,Al微粒 石墨混合材料,用直流电弧放电方法制备了洋葱状富勒烯。对两种产物进行了XRD、SEM、HRTEM和Raman结构表征。结果表明:两种纳米金属微粒均可催化得到洋葱状富勒烯;所得产物中有单纯洋葱状富勒烯和内包纳米金属微粒洋葱状富勒烯,且石墨化程度都很高;纳米金属微粒尺寸大小不同决定洋葱状富勒烯的直径分布不均匀,从而造成其拉曼谱峰相对于石墨特征峰1582cm-1发生了频移;用汽 液 固(VLS)生长模型描述了洋葱状富勒烯生长机理,解释了汽态碳原子通过在液态催化剂中扩散和析出,逐渐长大成形的现象。 展开更多
关键词 催化制 制备 富勒烯 石墨 结构表征 产物 微粒 碳原子 液态 HRTEM
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