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某型飞机起落架主减震系统吸收功量的计算与分析
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作者 付长安 张显余 魏秀玲 《飞机设计》 2012年第3期29-31,共3页
飞机减震系统在各种状况下吸收功量的情况是设计、使用、维修等部门始终关注的重要问题之一。由于我国长期沿用前苏联强度规范,在某型飞机起落架使用与维修中存在着一些需要探讨和澄清的问题。本文通过对某型飞机主减震系统吸收功量的... 飞机减震系统在各种状况下吸收功量的情况是设计、使用、维修等部门始终关注的重要问题之一。由于我国长期沿用前苏联强度规范,在某型飞机起落架使用与维修中存在着一些需要探讨和澄清的问题。本文通过对某型飞机主减震系统吸收功量的计算与分析认为,该机减震系统不存在长期以来一直认为的偏软问题,而是偏硬。在紧急情况下,认为飞机可以超载着陆,不必放油减重,减震系统吸收功量没有问题。 展开更多
关键词 着陆质 下沉速度 使用功量
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Impact of Mechanization on Lowland Rice Production in Nigeria
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作者 Faleye Tope David James +2 位作者 Olulani Temitope Dada-Joel Yinka Segun Ademiluyi Toshiyuki Wakatsuki 《Journal of Agricultural Science and Technology(B)》 2012年第1期114-120,共7页
The study examined the impact of using power tiller as a means of mechanizing lowland rice production in Nigeria. The study was carried out in Bida area, Niger State, where the sawah rice production was disseminated b... The study examined the impact of using power tiller as a means of mechanizing lowland rice production in Nigeria. The study was carried out in Bida area, Niger State, where the sawah rice production was disseminated by Watershed Initiative in Nigeria (WIN). And in Ajase Ipo of Kwara State, some of the parameters assessed during the study included average speed of operation, average wheel slip/travel reduction, average draught of implement, and fuel consumption. The cost of operation and yield over five years of usage at Niger State and two years in Kwara State was determined and it was therefore concluded that the power tiller is the most appropriate field machinery for tillage operations such as puddling, leveling on lowland rice production in Nigeria. 展开更多
关键词 MECHANIZATION rice production power tiller.
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