Results 61 to 70 of about 12,721 (256)
Design of aircraft turbine fan drive gear transmission system [PDF]
The following basic types of gear reduction concepts were studied as being feasible power train systems for a low-bypass-ratio, single-spool, geared turbofan engine for general aircraft use: (1) single-stage external-internal reduction, (2) gears (offset
Dent, E., Hirsch, R. A., Peterson, V. W.
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Kineto-static Analysis of Planetary Gear Train based on Vector Bond Graph Method
Jixie chuandong, 2016 For the problem of kineto- static analysis for planetary gear train,the corresponding vector bond graph procedure is proposed. Based on the kinematic constraint condition of planar compound revolute joint,the procedure for modeling planar compound ...
Wang Zhongshuang, Jing Weike
doaj
International Journal of Urban and Regional Research, EarlyView.Abstract The Beqaa Valley in Lebanon has become increasingly polluted, and residents are attributing illness to improper waste disposal and dumping. This article explores local epistemologies of pollution’s causes and effects in three films, which were researched and produced by local residents of Bar Elias, a small town in the Beqaa, which has rapidly
Hannah Sender +2 more
wiley +1 more source
Calculation Method of Planetary Gear Train Transmission Ratio based on Adjacency Matrix
Jixie chuandong, 2019 There are many types of planetary gear trains， and each one corresponds to a transmission ratio calculation formula， which makes great difficulties in the comprehensive research of planetary gear trains and the development of general design software ...
Zhao Wang, Xinping Wang, Jiexin Zhang
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AGRICULTURE IN A SOCIALIST CITY: Towards an Alter‐Urban Political Ecology
International Journal of Urban and Regional Research, EarlyView.Abstract Urban political ecology has developed as a critique of capitalist urbanization. This article develops the concept of alter‐urban political ecology to define urban environments emerging not from capitalist urbanization but from efforts to transform it. Drawing on archival research and ethnographic fieldwork in five urban farms in socialist Cuba,
Gustav Cederlöf
wiley +1 more source
Annals of Public and Cooperative Economics, EarlyView.Abstract The United Nations defined the Sustainable Development Goals (SDGs) in 2015. As a result, an increasing number of companies have integrated sustainable development practices into their activities with the aim of contributing to the SDGs achievement.
Joan R. Sanchis +2 more
wiley +1 more source
Reliability model for planetary gear [PDF]
A reliability model is presented for planetary gear trains in which the ring gear is fixed, the Sun gear is the input, and the planet arm is the output.
Coy, J. J., Paridon, C. A., Savage, M.
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Jixie chuandong, 2006 The torsional vibration model of the planetary gear train has combined with the virtual prototype technology. The dynamics simulation of the planetary gear train is proceeded with by the model established.
张庆霞 +3 more
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Business Ethics, the Environment &Responsibility, EarlyView.ABSTRACT This study investigates the impact of environmental attention on cryptocurrency market volatility by introducing the Crypto Environmental Attention Index (CEAI), a new metric inspired by Wang et al. (2022) and constructed using daily web search data.
Ines Ghazouani +2 more
wiley +1 more source
NASA helicopter transmission system technology program [PDF]
, 1983 The purpose of the NASA Helicopter Transmission System Technology Program is to improve specific mechanical components and the technology for combining these into advanced drive systems to make helicopters more viable and cost competitive for commerical ...
Zaretsky, E. V.
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