The impact of hydrogen refueling station subsidy strategy on China's hydrogen fuel cell vehicle market diffusion

Lack of hydrogen refueling stations (HRSs) has hindered the diffusion of hydrogen fuel cell vehicles (HFCVs) in the Chinese transport market. By combining the agent-based model (ABM) and the experience weighted attraction (EWA) learning algorithm, this paper explores the impact of government subsidy strategy for HRSs on the market diffusion of HFCVs. The actions of the parties (government, HRS planning department and consumers) and their interactions are taken into account. The new model suggests dynamic subsidy mode based on EWA algorithm yields better results than static subsidy mode: HFCV purchases, HRS construction effort, total number of HRSs and expected HRS planning department profits all outperform static data by around 27%. In addition, choosing an appropriate initial subsidy strategy can increase the sales of HFCVs by nearly 40%. Early investment from government to establish initial HRSs can also increase market diffusion efficiency by more than 76.7%.     

Development of strategic hydrogen refueling station deployment plan for Korea

The Republic of Korea government has set yearly targets of hydrogen cars and buses and plans to install hydrogen refueling stations nationwide. This paper proposes a methodology for developing a strategic deployment plan with three mathematical models. For a given target, future refueling demand locations and amount from general road and expressway are systematically estimated. First, the required number of refueling stations to satisfy the target covering ratio of the total demand set by the government is determined by the Station number determination model. Next, the locations of the capacitated stations and the allocation of demand to the stations are determined by the second Max cover and the third p-median models. Since the max covering is more important than minimizing the travel time, the two models are used sequentially. The nationwide hydrogen station deployment plan for the years 2022–2040 obtained by the proposed methodology is reported.     

Understanding attitudes of hydrogen fuel-cell vehicle adopters in Japan

As of January 2021, Japan had the world's largest hydrogen station network with merely 4600 hydrogen fuel-cell vehicles (HFCVs) on roads, as compared to the 9000 HFCVs in the US, with only one-third of the hydrogen refueling stations in Japan. To understand behavioral differences among Japanese adopters, we administered a survey, in cooperation with public and private sector stakeholders, involving 89 private HFCV adopters in the Aichi Prefectural region, which hosts the largest number of HFCVs and refueling stations in Japan. Results suggest that HFCV adopters have a higher socioeconomic status than non-adopters, are mostly male in their 50s and above, and have a higher interest in new vehicle fuel technology. HFCV adopters who leased and bought vehicles were similar in terms of socioeconomic status, with differences in attitudes toward governmental incentives. The lack of refueling stations and station business hours restrict HFCV adopters from continuing with this fuel technology.     

浅析小型水电站厂用电节约的优化措施

水电站厂用电指标使用综合厂用率,反映电站厂用电消耗的实际情况,可通过厂用电率合理性分析电站厂用耗电情况以及节能降耗挖潜的空间,促进厂用电的合理管理,提高电站效益。文章结合华能甘肃水电开发有限公司管控的6座小型水电站厂用电管理实践,分析了影响水电厂用电损耗的相关因素,提出了厂用电节能降耗的应对措施。     

高山寒冷矿区通风系统的改进

酒钢镜铁山铁矿地和山寒冷山区，通风条件复杂，原设计的整体压入式大主扇通风系统没有正常运转。根据矿山具体条件，在新中段采用多级机站通风系统。本文着重介绍新系统的特点、多级机站的布置，并分析了矿山通风中存在的几个问题。     

凤凰山铜矿通风系统的演变和发展

介绍了凤凰山铜矿通风系统由地表大主扇系统逐步演变为多级机站的过程，既满足了井下的通风需求，又取得了良好的经济与社会效益。同时提出生产矿山加强回风道维护的重要性，以及在设计和布置通风井时应注意的问题。     

射速对顶置武器站连发精度的影响

为获得射速对某型顶置武器站连续射击精度的影响规律,分析射速对武器站连续射击炮口扰动的影响规律。运用虚拟样机技术,借助三维建模软件SolidWorks以及动力学分析软件RecurDyn,建立了路、车、炮一体化动力学模型,并对车载顶置武器站在不同射速的条件下分别进行了停止间和行进间连续射击的动力学仿真。仿真结果表明:通过分析武器站炮口振动特性的曲线,得到了不同射速下炮口振动特性规律,可为国内顶置武器站的研制设计和改进升级提供理论借鉴和技术参考。     

青岛市集中供热和采暖方式的实证分析

通过对青岛市供热现状的调查分析，借鉴世界先进国家的经验和发展方向，对青岛市集中供热和采暖方式的选择与取向进行了探讨，提出以大型集中锅炉房为主要选择、逐步向大型热电站发展的思路和建议．     

真空-堆载联合预压技术在滨海相吹填路基中的应用

介绍了真空-堆载联合预压技术原理及其在青岛市滨海公路工程软基处理中的应用。说明了真空-堆载联合预压技术在滨海相吹填地基的应用是适用的、成功的，可以推广应用。     

联合防护加固技术在路堑高边坡工程中的应用

本文通过对某路堑高边坡治理工程设计、施工方法的介绍和分析,肯定了联合防护加固技术的可行性,为今后同类工程设计、施工提供了有价值的参考。