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介绍了电动自行车的发展现状,分析了我国中小城市的基本特征,从多个方面说明在中小城市适合电动自行车的发展。指出在中小城市发展电动自行车,关键是做好管理工作,并提出了具体的管理措施。 相似文献
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设计了一种新型电动式调节阀,介绍了它的工作原理、主要结构和特点。测试结果表明,该型电动式调节阀的调节精度为±1%。 相似文献
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The Remotely Piloted Commercial Passenger Aircraft Attitude Scale (RPCPAAS) was created to measure positive and negative attitudes towards a new and plausible form of air travel. This information was then used, in combination with a latent class logit model built on data generated from a stated choice experiment to gain insight into the choice behaviour between conventionally piloted aircraft (CPA) with a pilot on-board and remotely piloted aircraft (RPA) with a pilot on the ground. The results revealed that individuals, on-average, if presented a choice between a CPA and a RPA of equivalent attributes, would elect for the CPA option. However, there is variability in the passengers’ sensitivity to various flight attributes, and these sensitivities were influenced by individuals’ attitude towards the new technology (i.e., RPA). From an operational perspective, and assuming that one day passengers of commercial airlines are offered the choice between CPA and RPA, the strategies employed by airlines to encourage the use of the new technology need to be different, based on individuals’ attitude towards RPA. 相似文献
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对民营资本在港口投资中的历程及现状进行了分析,论述了民营资本投资港口的主要方式,并引用SWOT模型,对民营资本投资港口业进行了进一步的分析,最后,对港口业民营资本的投资提出了对策和建议。 相似文献