排序方式: 共有95条查询结果,搜索用时 31 毫秒
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任柏林 《湖北汽车工业学院学报》1994,(2):49-53
本文介绍了AutoCAD系统在汽车行业实际应用中作二次开发所涉及的范围,开发的重点、难点及实现方法。 相似文献
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内河航道船舶定线制条件下的航标配布探讨 总被引:3,自引:0,他引:3
通过分析长江干线船舶定线制的特点,研究船舶定线制的一般形式与要求,总结已实施的航路改革航标配套工程实践,在<内河助航标志>标准体系下,提出了内河航道船舶定线制条件下的航标配布特点和注意的地方,为内河船舶定线制的实施提供了参考. 相似文献
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数控肋骨冷弯机自动控制检测方法的改进 总被引:3,自引:0,他引:3
分析了传统的数控肋骨冷弯机控制方法与机构,阐述了统线测量控制法的基本原理。据此建立了新的控制检测方法和数学模型,提出了基于弦线测量控制法的新的控制检测方法。 相似文献
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不良驾驶行为(车速过高,车速变化过快等)影响危险货物及车辆的稳定性,是导致危险货物运输事故频发且后果严重的重要原因. 基于对营运车辆联网联控系统海量数据的分析处理,根据其属性提取8 个驾驶行为量化指标,采用因子分析和模糊C均值聚类相结合的方法,实现对危险货物运输车辆驾驶员风险驾驶行为的科学聚类. 结果表明,危险货物运输车辆驾驶行为特征可有效聚为急加减速、超速驾驶和变速驾驶3 种行为,且在每种驾驶行为下实现对驾驶员安全等级的分类. 由此可以识别风险较高的驾驶员,这对危险货物运输企业和行业管理部门有重要参考意义. 相似文献
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换电企业在城市内建立换电柜,满足不断增长的电动自行车换电需求,涉及到换电柜的选址,电池的投放和换电需求的预测.本文分析了国内某大型换电企业的换电订单数据,发现换电柜存在使用严重不均衡问题,为提高使用率,降低换电成本,提出按区域对换电需求量进行聚类并预测的方法.首先,对换电柜位置进行K-means聚类,据此优化换电柜的投... 相似文献
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Autonomous mobility is one of the rapidly evolving aspects of smart transportation which carries the potential of reshaping both demand and supply sides of transportation systems. While understanding public opinions about autonomous vehicles (AVs) is a compelling step towards their successful implementation, still little is known about to which extent people will embrace this new technology and how the vehicle features will affect their adoption decision. This study presents a new approach for modeling the adoption behavior of fully AVs using the profile-case best-worst scaling model. In this approach, an AV profile which is characterized in terms of the main vehicle attributes and their associated levels is presented to the decision maker and he/she is asked to select the most and the least attractive attributes. Further, a binary adoption question at the end of the choice task inquires if the respondent is willing to purchase the described AV. Utilizing this method, we can recognize the difference between the intrinsic impacts of the vehicle attributes and the impact of the attribute levels on the adoption decision. Results of the analysis indicate that people are much more sensitive to the purchase price and incentive policies such as taking liability away from the “driver” in case of accidents and provision of exclusive lanes for AVs compared to other factors such as fuel efficiency, safety, or environmental friendliness. Further, it is found that millennials with higher income, those who live in the downtown area, and the majority of people who have experienced an accident in the past have greater interests in adopting this technology. 相似文献
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荣彦 《筑路机械与施工机械化》2007,24(12):77-80
为了加快筑路机械电器故障诊断的进程,提出了隔离试功能概念及使用隔离试功能法的注意事项,阐明了实现隔离试功能常用的几种方法,并对电子部件的隔离试功能法也进行了探讨,给出了制作多功能信号模拟检测仪的思路。实践表明:这些方法简单实用,使用这些方法,可大大加快筑路机械电器故障诊断的进程。 相似文献
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分析了"跨越—2009"跨区基地实兵系列军事演习在跨区机动中存在着通信指挥手段少、伪装防护办法少,铁路、公路间转运速度慢的问题;提出了在复杂电磁环境下,灵活运用多种通信指挥手段、实施全程动态伪装防护、开展多部门参与的转运联合训练等应对措施,这些措施对我军快速、安全进行远程机动具有一定的参考价值。 相似文献