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陶瓷摩擦学——基础研究与实际应用工艺水平述评 被引量:3
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作者 peter andersson Jarmo Vihersalo 欧博明 《润滑与密封》 CAS CSCD 北大核心 1992年第3期63-68,共6页
一、引言工程陶瓷作为硬质材料,经常被划入抗磨材料类。然而,最近几十年所出版的有关陶瓷与陶瓷或与金属接触时的摩擦磨损的研究报导表明:其摩擦学性能随材料和操作条件的不同而显著不同。本文主要叙述陶瓷作不同的摩擦学应用尤其是在... 一、引言工程陶瓷作为硬质材料,经常被划入抗磨材料类。然而,最近几十年所出版的有关陶瓷与陶瓷或与金属接触时的摩擦磨损的研究报导表明:其摩擦学性能随材料和操作条件的不同而显著不同。本文主要叙述陶瓷作不同的摩擦学应用尤其是在径向轴承应用的现状。脆性,作为陶瓷家族中所有材料的典型特征。 展开更多
关键词 陶瓷 摩擦学 工艺水平
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Benefits and Costs of Autonomous Trucks and Cars
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作者 peter andersson Pernilla Ivehammar 《Journal of Transportation Technologies》 2019年第2期121-145,共25页
Autonomous vehicles are currently developed, and are expected to be introduced gradually. Society needs a basis for decisions regarding market interventions. This study identifies, quantifies and values the benefits a... Autonomous vehicles are currently developed, and are expected to be introduced gradually. Society needs a basis for decisions regarding market interventions. This study identifies, quantifies and values the benefits and costs of autonomous trucks and cars considering generalized costs, external effects and social marginal cost pricing to consumers with Swedish data. The results show that the greatest benefits are saved driver costs for trucks and decreased travel time costs for car drivers. In the example calculations, capital costs may increase by 22 percent for cars and 36 percent for trucks for benefits to exceed costs in 2025. Subsidies are not needed since the producers and consumers get the major benefits and pay the costs. 展开更多
关键词 AUTONOMOUS VEHICLES SELF-DRIVING VEHICLES BENEFITS Generalized COST Social MARGINAL COST Policy
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