EnergyRN: Transportation (Sub-Topic)最新文献

Improving Aircraft Fuel Efficiency by Using the Adaptive Wing and Winglets 利用自适应机翼和小翼提高飞机燃油效率

EnergyRN: Transportation (Sub-Topic) Pub Date : 2020-04-27 DOI: 10.15587/1729-4061.2020.200664

V. Popov, V. Loginov, Volodymyr Shmyrov, Yevgen Ukrainets, Petro Steshenko, Pavlo A. Hlushchenko

{"title":"Improving Aircraft Fuel Efficiency by Using the Adaptive Wing and Winglets","authors":"V. Popov, V. Loginov, Volodymyr Shmyrov, Yevgen Ukrainets, Petro Steshenko, Pavlo A. Hlushchenko","doi":"10.15587/1729-4061.2020.200664","DOIUrl":"https://doi.org/10.15587/1729-4061.2020.200664","url":null,"abstract":"Improving the aircraft’s fuel efficiency is one of the main requirements for prospective and modernized aircraft. This paper reports the assessment of change in aerodynamic quality resulting in the improved fuel efficiency of a long-range aircraft when using promising means to enhance aerodynamic quality. These means include the abandonment of the mechanization of wing edges and conventional controls through the use of an adaptive wing, the artificial laminarization of the flow around the elements of a glider, the application of winglets. The abandonment of conventional wing controls and wing mechanization is predetermined by the need to ensure a seamless surface of the glider elements to prevent the premature turbulization of the flow that consequently leads to a decrease in the profile drag of an aircraft. The use of winglets is aimed at reducing inductive drag. Determining a change in the aircraft’s fuel efficiency would make it possible to estimate a change in the operating costs during its life cycle. The study employed the known modular software complex «Integration 2.1». The engineering and navigational calculation was performed for a typical flight profile of a long-range aircraft. The possibility of reducing fuel consumption by up to 20 % has been shown. The largest impact on the decrease in fuel consumption is exerted by the flow laminarization on the surface of the glider elements; the reduction in fuel consumption was 17.1 %. The abandonment of mechanization and ailerons decreases fuel consumption by 3.9 %, while the abandonment of ailerons, slats, and flaps reduces fuel consumption by 0.4, 1.5, and 0.4 %, respectively. The use of spiroid winglets made it possible to reduce fuel consumption by 1.95 %","PeriodicalId":210650,"journal":{"name":"EnergyRN: Transportation (Sub-Topic)","volume":"334 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116906930","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Market Expanding or Market Stealing? Competition with Network Effects in Bikesharing 扩大市场还是窃取市场?共享单车中的竞争与网络效应

EnergyRN: Transportation (Sub-Topic) Pub Date : 2018-08-01 DOI: 10.3386/W24938

Guangyu Cao, G. Jin, Li-an Zhou

引用次数: 11

Better Lucky Than Rich? Welfare Analysis of Automobile License Allocations in Beijing and Shanghai 幸运比富有好?北京和上海汽车牌照分配的福利分析

EnergyRN: Transportation (Sub-Topic) Pub Date : 2016-10-01 DOI: 10.2139/ssrn.2349865

Shanjun Li

{"title":"Better Lucky Than Rich? Welfare Analysis of Automobile License Allocations in Beijing and Shanghai","authors":"Shanjun Li","doi":"10.2139/ssrn.2349865","DOIUrl":"https://doi.org/10.2139/ssrn.2349865","url":null,"abstract":"Economists often favour market-based mechanisms over non-market based mechanisms to allocate scarce public resources on grounds of economic efficiency and revenue generation. When the usage of the resources in question generates type-dependent negative externalities, the welfare comparison can become ambiguous. Both types of allocation mechanisms are being implemented in China's major cities to distribute limited vehicle licences as a measure to combat worsening traffic congestion and air pollution. While Beijing employs non-transferable lotteries, Shanghai uses an auction system. This article empirically quantifies the welfare consequences of the two mechanisms by taking into account both allocation efficiency and automobile externalities post-allocation. Our analysis shows that different allocation mechanisms lead to dramatic differences in social welfare. Although Beijing's lottery system has a large advantage in reducing automobile externalities over auction, the advantage is offset by the significant allocative cost from misallocation. The lottery system in Beijing resulted in a social welfare loss of 30 billion Yuan (nearly $5 billion) in 2012 alone. A uniform-price auction would have generated nearly 20 billion Yuan to Beijing municipal government, more than covering all its subsidies to the local public transit system.","PeriodicalId":210650,"journal":{"name":"EnergyRN: Transportation (Sub-Topic)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125351891","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 95

Financing Regional Public Transit in Ontario: The Case for Strengthening the Wicksellian Connection 安大略省区域公共交通融资:加强维克塞利安连接的案例

EnergyRN: Transportation (Sub-Topic) Pub Date : 2015-08-10 DOI: 10.2139/SSRN.2642438

E. Slack, R. Bird

引用次数: 0

Customer Perceived Values Associated with Automobile and Brand Loyalty 与汽车和品牌忠诚度相关的顾客感知价值

EnergyRN: Transportation (Sub-Topic) Pub Date : 2015-04-20 DOI: 10.24924/IJABM/2015.04/V3.ISS1/92.107

Yousif, Zubair Hassan

{"title":"Customer Perceived Values Associated with Automobile and Brand Loyalty","authors":"Yousif, Zubair Hassan","doi":"10.24924/IJABM/2015.04/V3.ISS1/92.107","DOIUrl":"https://doi.org/10.24924/IJABM/2015.04/V3.ISS1/92.107","url":null,"abstract":"The purpose of this study is identifying the customer perceived value associated with automobile and examining its impact on customer satisfaction and brand loyalty. A sample size of 198 respondents was chosen from various points in Jeddah, Saudi-Arabia using convenient sampling. A multi-factor CPV questionnaire with a Likert-Scale from 1-5 was used to collected the data to determine customer perceived value associated with automobile and its impact on customer satisfaction and brand loyalty. To ensure reliability and validity of the data set, sample size only includes respondents who have been using/driving an automobile for a year. Descriptive statistics shows that the most significant perceived value associated with automobile is functional value followed by emotional value and epistemic value. Social value was the least reason that respondents purchase an automobile. In terms of correlations, this study found that overall customer perceived value associated with automobile is highly correlated with customer satisfaction and brand loyalty. Bivariate multiple regression analysis shows that there is a significant and positive impact of FV and CV on customer satisfaction. We do not find any significant influence of EV, EPV and SV on customer satisfaction. However we found that there is a significant and positive impact of EV, FV and CV on customer brand loyalty. Again we did not find any significant impact of SV and EPV on brand loyalty. The current study contributes to the body of research by investigating the combined impacts of customer perceived value on automobiles using one instrument on cross-sectional setting. This research shows that customer perceived value associated with automobile is crucial in increasing customer satisfaction and brand loyalty. Future research should be undertaken on different context or by increasing the sample size by widening the research context to ensure validity and reliability of the results","PeriodicalId":210650,"journal":{"name":"EnergyRN: Transportation (Sub-Topic)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130394926","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 14

Public Transit Bus Procurement: the Role of Energy Prices, Regulation and Federal Subsidies 公共交通巴士采购:能源价格、监管和联邦补贴的作用

EnergyRN: Transportation (Sub-Topic) Pub Date : 2014-03-01 DOI: 10.2139/ssrn.2393806

Shanjun Li, Matthew E. Kahn, Jerry Nickelsburg

引用次数: 17

Does Learning by Exporting Happen? Evidence from the Automobile Industry in China 通过输出来学习吗?来自中国汽车工业的证据

EnergyRN: Transportation (Sub-Topic) Pub Date : 2013-08-01 DOI: 10.1111/rode.12043

T. Luong

引用次数: 15