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带水平吹气管L阀的特性及公式 被引量:4
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作者 房倚天 吴晋沪 +1 位作者 王鸿瑜 王洋 《化学反应工程与工艺》 CAS CSCD 北大核心 1999年第4期424-427,442,共5页
针对带水平吹气管L阀吹气量、水平管吹气管的伸入深度、管径以及不同高度吹气口对循环流化床(CFB)固体颗粒循环速率的影响进行了研究。根据实验数据得出适合于带有水平吹气管L阀的经验关联式:GsA = 0.0156CD 2ρ... 针对带水平吹气管L阀吹气量、水平管吹气管的伸入深度、管径以及不同高度吹气口对循环流化床(CFB)固体颗粒循环速率的影响进行了研究。根据实验数据得出适合于带有水平吹气管L阀的经验关联式:GsA = 0.0156CD 2ρs(1- εm f)ΔPLV(1- XL)0.353 ULUt0. 展开更多
关键词 L阀 颗粒循环速率 关联式 水平吹气管 流化主档
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Sport, Democracy, and the Americanization of Italian Americans
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《History Research》 2012年第5期349-354,共6页
More than 4,000,000 immigrants traveled from Italy to the United States between 1880 and 1924. Most were peasants, largely illiterate, and with no sense of an Italian identity as their ancestral home had only been lib... More than 4,000,000 immigrants traveled from Italy to the United States between 1880 and 1924. Most were peasants, largely illiterate, and with no sense of an Italian identity as their ancestral home had only been liberated from centuries of foreign rule in 1861. This study utilizes primary and secondary documents, as well as archival sources and interviews to determine the role of sport in the transition to an Italian identity, and then an American identity within the assimilation process. Second generation youth adopted American sport forms, and some became national heroes in contrast to the stereotype of Italian gangsters. By the 1950s Italians had become icons of popular culture, yet negative stereotypes persisted and assimilation remained fragmented. 展开更多
关键词 SPORT ETHNICITY Italian Americans AMERICANIZATION ASSIMILATION
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