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51.
Maurie J. Cohen 《Research Policy》2010,39(4):459-470
A growing volume of scholarship and policy practice focuses on developing societal capacity to guide transitions of socio-technical systems toward more sustainable alternatives. Because several prominent modes of transportation are widely regarded as systemically problematic, the notion of sustainable mobility has received considerable attention from the standpoint of system innovation. Sustainability though constitutes only one of many contemporary political objectives and public commitment to goals consistent with such a future is highly equivocal. A related challenge arises from the ambivalence that sustainability champions often harbor on an individual level. It is probable that efforts to facilitate sustainable mobility will need to be reconciled with rival societal aspirations such as the pursuit of faster and more convenient forms of travel. Drawing on insights from the multi-level perspective, this article contrasts the relatively static automobility system with its more dynamic aeromobility counterpart and explores why evidence of an incipient transition is more apparent within the realm of aviation. In particular, the diffusion of “personal aeromobility” involving the use of small airplanes for on-demand, point-to-point air travel raises perplexing questions for the governance of sustainable mobility. 相似文献
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根据投入产出分析方法,构建相应的投入产出模型,同时利用RAS法对投入产出表进行必要的调整,对飞机制造业的经济影响进行了实证研究。实证结果表明:飞机制造业的发展将拉动相关第二产业的迅猛发展,同时极大地推动第三产业的前进,有效促进产业结构优化升级。最后根据分析结果提出了相应的政策建议。 相似文献
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翻译民机项目采购研制合同,译者需要考虑航空、经贸、法律的综合语境,通过经常性的翻译实践积累专业术语表达,根据词性、逻辑关系、用法和搭配来灵活确定多义词的含义,注意把握合同的文体特征,在古体词和并列近义词的处理上力求保持法言法语的特点,翻译长句时既要通过断句厘清层次、也要在表达方式上符合汉语习惯。该文通过具体实例展示了以上各种翻译策略的应用技巧,以期对民机项目采购研制合同翻译提供一些有益的指导。 相似文献
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研究了民用飞机中FPGA的设计,主要包括FPGA设计的研制生命周期、设计与验证过程,以及在关键系统中FPGA设计的单粒子翻转效应及可测试性考虑。 相似文献
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本文阐述了民机货舱通风系统通风量、热载荷等设计输入的确定,介绍了常用的通风与加热构型及优缺点比较,并阐述了民机货舱设计中相关适航条款的验证思路。 相似文献
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文章在现有金属飞机钢索变形理论的基础上,对复材飞机操纵钢索的设计和应用进行了详细的论述。总结性地提出了软式钢索操纵的设计步骤,在已有钢索变形量计算理论的基础上,考虑热、结构、座舱增压等因素的影响,计算钢索变形量并确定了钢索初始张力的予加原则,并给出钢索张力示例曲线,为钢索张力维护和调节提供理论依据。 相似文献
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This paper focuses on automatic climbing control methods for large civil aircraft. The key technique is how to design automatic flight control laws that meet the requirements of flight performance indexes and have good characteristics of restraining various disturbances. The classical engineering methods are used to solve the above problem. Based on the aerodynamic data of Boeing707, a nonlinear model of large civil aircraft is established. Linear models which are divided into longitudinal and lateral equations are obtained by trim and linearization. The design of longitudinal control laws uses C? criterion, three climbing schemes including pitch control mode, vertical velocity control mode and altitude control mode are designed and mutually compared. For lateral control problem, by the feedback angle of sideslip, the bank attitude control with good effect is achieved. The simulation results indicate the designed control laws can meet the requirements of performance indexes, and have satisfied characteristics of anti-gust disturbance. 相似文献
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梁智生 《南昌教育学院学报》2012,(2):105-106
高职飞机机电维修专业是民航维修类专业的骨干专业,为满足民航发展需求,推进该专业的持续发展,我们分析了近几年该专业毕业生的就业岗位群情况,对于该专业毕业生可预期增长的就业方向也做了初步研究,为进一步改进该专业建设提供依据。 相似文献
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刘宏 《扬州教育学院学报》2003,21(4):47-51
台湾处于西太平洋第一岛链的枢纽位置,是美国控制太平洋,遏制中国、威慑日本和俄罗斯的"不沉的航空母舰";台湾是中国前出太平洋的门户,维护海洋权益的基地,屏障大陆和完整海防的海上堡垒;日本是未来解决台湾问题的潜在威胁。 相似文献