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11.
氢燃料电池汽车是汽车未来发展结构更迭的趋势之一,目前在氢燃料电池汽车业的产业培育期,产业之间的利益协调问题并未得到有效分析,未来成熟期的产业发展趋势也尚不明朗。文章在燃料电池汽车产业培育期基于纳什均衡原理,分析各利益主体之间的利益协调问题;在产业成熟期时,运用演化博弈论的理论讨论产业各企业与政府之间的产业强化机理与空间扩散机理;最后,通过对产业培育期与产业成熟期的两种模型的讨论分析,提出了利于政府、科研院所与企业各方之间需要相互协调共同促进发展的合理化建议。 相似文献
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深基坑双排桩结构受力变形机理及其计算模型研究 总被引：1，自引：1，他引：0
薛光桥 《铁道标准设计通讯》2016,60(7):116-120
近年来,为了适应国内城市地下工程建设蓬勃发展带来的地下工程密集化、复杂化等方面的需要,深基坑开挖时双排桩围护结构因具有侧向刚度大、控制变形能力强、施工快速等特点在各种大型深基坑工程中得到了较为广泛的推广和应用。但实际设计过程中,由于该结构的变形机理与计算模型尚未有统一的理论,其设计方法比较杂乱,存在一定程度的保守设计。依托南京梅子洲青奥城地下空间工程及其现场监测数据,采用有限元计算模型对近年来在地下工程中逐渐得到推广使用的双排桩围护结构的变形机理、土压力分布规律等进行探讨和研究;在此基础上,结合与目前广为应用的理正双排桩模型和新规范双排桩模型的对比分析,研究并提出更吻合实际的、精确反映结构变形和力学特性的双排桩围护结构的修正设计计算模型,该模型架构清晰,准确性高,贴近实际工程设计,可以大力推广应用于双排桩结构的计算分析。 相似文献
13.
新能源汽车动力电池退役问题备受关注,处置不当会造成环境污染和资源浪费,因此,做好动力电池的再次利用刻不容缓。文章以在新能源汽车动力电池回收系统中,是否利用技术创新问题为出发点,通过构建电池生产商和回收商演化博弈模型,得出在动力电池梯次利用阶段,政府部门应给予第三方回收企业技术创新补贴,将有助于形成稳定的动力电池闭环回收市场。 相似文献
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Today’s air traffic operations follow the paradigm of ‘flow follows structure’, which already limits the operational efficiency and punctuality of current air traffic movements. Therefore, we introduce the dynamic airspace sectorisation and consequently change this paradigm to the more appropriate approach of ‘structure follows flow’. The dynamic airspace sectorisation allows an efficient allocation of scarce resources considering operational, economic and ecological constraints in both nominal and variable air traffic conditions. Our approach clusters traffic patterns and uses evolutionary algorithms for optimisation of the airspace, focusing on high capacity utilisation through flexible use of airspace, appropriate distribution of task load for air traffic controllers and fast adaptation to changed operational constraints. We thereby offer a solution for handling non-convex airspace boundaries and provide a proof of concept using current operational airspace structures and enabling a flight-centric air traffic management. We are confident that our developed dynamic airspace sectorisation significantly contributes to the challenges of future airspace by providing appropriate structures for future 4D aircraft trajectories taking into account various operational aspects of air traffic such as temporally restricted areas, limited capacities, zones of convective weather or urban air mobility. Dynamic sectorisation is a key enabling technology in the achievement of the ambitious goals of Single European Sky and Flightpath 2050 through a reduction in coordination efforts, efficient resource allocation, reduced aircraft emissions, fewer detours, and minimisation of air traffic delays. 相似文献
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Aircraft boarding is a process mainly impacted by the boarding sequence, individual passenger behavior and the amount of hand luggage. Whereas these aspects are widely addressed in scientific research and considered in operational improvements, the influence of infrastructural changes is only focused upon in the context of future aircraft design. The paper provides a comprehensive analysis of the innovative approach of a Side-Slip Seat, which allows passengers to pass each other during boarding. The seat holds the potential to reduce the boarding time by approx. 20%, even considering operational constraints, such as passenger conformance to the proposed boarding strategy. A validated stochastic boarding model is extended to analyze the impact of the Side-Slip Seat. The implementation of such fundamental change inside the aircraft cabin demands for adapted boarding strategies, in order to cover all the benefits that accompany this new dynamic seating approach. To reasonably identify efficient strategies, an evolutionary algorithm is used to systematically optimize boarding sequences. As a result, the evolutionary algorithm depicts that operationally relevant boarding strategies implementing the Side-Slip Seat should differentiate between the left and the right side of the aisle, instead of the current operationally preferred boarding from the back to the front. 相似文献
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对采用减荷措施的高填方涵洞进行有限元计算,分析其在此条件下的垂直土压力、侧向土压力及基底土压力,以此证明采取减荷措施进行涵洞设计的意义与经济价值。 相似文献
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大型自动化立体仓库是物流重要环节,其货物存取效率至关重要,而货位优化配置是提升其效率的有效方法.比较分析了几种常见的货位优化方法后,选择周期性病毒遗传算法（CVEGA）进行优化仿真,并根据实际优化条件设计了列数优先的病毒编码规则.结果表明：和传统遗传算法相比,计算效率有了明显提升,更能满足现场实际需求. 相似文献
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粒子群优化算法是一种随机的全局优化搜索方法。本文系统的介绍了粒子群优化算法和"Stretching"技术并提出了基于"stretching"技术的粒子群算法,然后用标准测试函数对新算法进行了实验。实验结果表明新算法在解的收敛性和稳定性等方面优于基本的粒子群优化算法。 相似文献
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This paper introduces the fleet size and mix pollution-routing problem which extends the pollution-routing problem by considering a heterogeneous vehicle fleet. The main objective is to minimize the sum of vehicle fixed costs and routing cost, where the latter can be defined with respect to the cost of fuel and CO2 emissions, and driver cost. Solving this problem poses several methodological challenges. To this end, we have developed a powerful metaheuristic which was successfully applied to a large pool of realistic benchmark instances. Several analyses were conducted to shed light on the trade-offs between various performance indicators, including capacity utilization, fuel and emissions and costs pertaining to vehicle acquisition, fuel consumption and drivers. The analyses also quantify the benefits of using a heterogeneous fleet over a homogeneous one. 相似文献
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汽车共享能够显著缓解交通拥堵、降低城市交通污染.由于汽车共享能够部分代替私家车出行,汽车共享方式的引入对居民出行行为选择具有重要意义.基于演化博弈论,分析了汽车共享引入后与私家车的博弈过程.以城市居民出行选择行为为出发点,分析汽车共享和私家车出行方式的特点,考虑汽车共享服务水平随服务人数变化因素、政府参与管理因素,建立汽车共享和私家车的演化博弈模型.根据动力学相关知识,分析模型参数,得出各个平衡点稳定的条件.通过分析系统演化稳定状态,为汽车共享出行方式的推广和政府相关政策制定提供理论支撑. 相似文献