排序方式: 共有11条查询结果,搜索用时 15 毫秒
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靶场瞎弹处理车的液压系统设计 总被引:1,自引:0,他引:1
目前,国内靶场瞎弹的处理问题尚未得到妥善的解决。根据靶场瞎弹处理车的工作特点,该文对其液压系统进行了设计,并分析了液压系统的特点。 相似文献
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为了降低密贴检查器维护和检修中的高运营成本,提高安全保障能力,提出了一种改进YoloX-s的密贴检查器故障检测方法。通过改进YoloX-s中的PANet路径融合网络,进一步地增加了与浅层特征层的融合;此外,增加了CA(Coordinate Attention)注意力机制,将注意力集中在目标区域内,以获取细节信息;选用CIoU损失函数以聚焦目标框与检测框之间的重叠面积、中心点距离和长宽比,提高模型的定位精度。实验结果表明,相较于YoloX-s模型,所提模型有着更好的综合表现,动接点环平均精度为97.73%,静接点片平均精度为98.83%,平均精度均值为98.28%。 相似文献
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Bicycle-sharing system is considered as a green option to provide a better connection between scenic spots and nearby metro/bus stations. Allocating and optimizing the layout of bicycle-sharing system inside the scenic spot and around its influencing area are focused on. It is found that the terrain, land use, nearby transport network and scenery point distribution have significant impact on the allocation of bicycle-sharing system. While the candidate bicycle-sharing stations installed at the inner scenic points, entrances/exits and metro stations are fixed, the ones installed at bus-stations and other passenger concentration buildings are adjustable. Aiming at minimizing the total cycling distance and overlapping rate, an optimization model is proposed and solved based on the idea of cluster concept and greedy heuristic. A revealed preference/stated preference (RP/SP) combined survey was conducted at Xuanwu Lake in Nanjing, China, to get an insight into the touring trip characteristics and bicycle-sharing tendency. The results reveal that 39.81% visitors accept a cycling distance of 1-3 km and 62.50% respondents think that the bicycle-sharing system should charge an appropriate fee. The sttrvey indicates that there is high possibility to carry out a bicycle-sharing system at Xuanwu Lake. Optimizing the allocation problem cluster by cluster rather than using an exhaustive search method significantly reduces the computing amount from O(2^43) to O(43 2). The 500 m-radius-coverage rate for the alternative optimized by 500 m-radius-cluster and 800 m-radius-cluster is 89.2% and 68.5%, respectively. The final layout scheme will provide decision makers engineering guidelines and theoretical support. 相似文献
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步行轮式气垫车是一种有效的两栖交通工具。但其功率消耗巨大。本文根据文献的理论推导,试验验证了步行轮式气垫车的最小功率原理。 相似文献
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针对规划地块的机械式停车设备适应性问题,利用多目标决策方法和系统分析思想,从工程经济性、技术可行性、环境适应性和用地适应性4方面建立指标体系并构建了基于灰色关联分析法的机械式停车设备适应性分析模型,为各类机械式停车设备的选型提供理论依据。该模型使用简单、指标确定灵活,采用定量分析方法,有效克服了成本分析法和加权因素分析法考虑因素单一、主观性强的缺点。 相似文献
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介绍了非线性电路完备状态方程式的几个相关定义,并对方程式的存在条件进行了讨论,最后介绍了方程式的两种编写方法。 相似文献
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