基于感性意象的电动扫地车造型设计研究

目的进一步提高城市街道电动扫地车造型与用户主观偏好的匹配程度。方法选取典型扫地车外观造型风格意象词汇进行研究,并选取语义差分法(SD法)对相关感性意象词汇进行视觉化描述和量化表达。结论将电动扫地车造型简化为特征线,采用贝塞尔曲线对其进行量化描述,获得造型特征线和感性意象词汇之间的映射关系,以期对电动扫地车造型设计进行指导,提升设计与感性意象间的匹配度。     

计算机在备煤生产中的应用

本文介绍用可编程序控制器（PLC）控制皮带系统使其实现自动化控制,同时用自己编程的梯形图程序实现了皮带运转时间的记录,对上,下通廓,斗槽皮带卸料小车和堆取料机实现了工作位置,工作时间的显示和记录,使煤种质量管理达到了计算机自动监控,杜绝了质量事故的发生。在旧皮带系统改造过程中,吸取了新系统设计的优点,并增加了皮带手动联锁,使皮带系统自动控制更加完善。     

A Data Download Method from RSUs Using Fog Computing in Connected Vehicles

Communication is important for providing intelligent services in connected vehicles. Vehicles must be able to communicate with different places and exchange information while driving. For service operation, connected vehicles frequently attempt to download large amounts of data. They can request data downloading to a road side unit (RSU), which provides infrastructure for connected vehicles. The RSU is a data bottleneck in a transportation system because data traffic is concentrated on the RSU. Therefore, it is not appropriate for a connected vehicle to always attempt a high speed download from the RSU. If the mobile network between a connected vehicle and an RSU has poor connection quality, the efficiency and speed of the data download from the RSU is decreased. This problem affects the quality of the user experience. Therefore, it is important for a connected vehicle to connect to an RSU with consideration of the network conditions in order to try to maximize download speed. The proposed method maximizes download speed from an RSU using a machine learning algorithm. To collect and learn from network data, fog computing is used. A fog server is integrated with the RSU to perform computing. If the algorithm recognizes that conditions are not good for mass data download, it will not attempt to download at high speed. Thus, the proposed method can improve the efficiency of high speed downloads. This conclusion was validated using extensive computer simulations.     

高速公路中的行车道检测和车辆跟踪

提出了一种有效的高速公路检测和多车辆跟踪视觉系统.该系统主要模块包括道路检测、基于二维模型的车辆跟踪器(近距离车辆的矩形模型和远距离车辆的U形模型)、启发式车辆检测、系统协调器.在系统中,跟踪器的动态产生和终止优化了系统的计算资源.另外,系统利用鲁棒性估计技术提高了道路检测的性能.车辆的跟踪是采用三参数状态空间的多边形拟合技术来实现的.本文采用了PETS2001提供的图像序列测试了系统有效性,在Pentium Ⅲ 450MHz PC 上系统的处理速度为平均每帧12毫秒.     

普通乘用车主要性能综合评价的研究

结合实际从人机工程学的基础出发，以普通乘用车主要性能综合评价作为总评价目标，通过系统分析和目标分解建立评价指标体系，应用BP人工神经网络对普通乘用车主要性能进行综合评价，进行实验设计并获得实验数据，利用BP人工神经网络求解了总评价目标与各性能评价指标之间各层的权值。     

车组偏差系统的分散控制

研究汽车车组速度和距离偏差系统的控制问题。针对具有重叠结构的车组速度与距离偏差的线性随机系统模型 ,利用系统的包含原理 ,给出一种分散、次优的 L QG控制设计方法 ,并给出了利用该方法对车组偏差系统进行控制的仿真结果     

等离子体净化柴油车尾气的能耗研究

分析了低温等离子体净化柴油车尾气技术的类型、工作原理和主要技术路线，指出在该技术的研制过程中，研究者多关注于废气的处理效果而忽视了能量消耗的控制。提出柴油车等离子体技术能量消耗评价指标的限值，即允许的能量密度应低于12J／L，并进行了定量分析，指出该技术理论上虽然可以处理柴油车的主要污染物HC、CO、NOnPM等，但在现有技术务件下，等离子体发生器消耗的能量过高。提出该技术只有与催化转化技术结合，才是现实可行的技术路线，最后分析了为降低能量消耗而须采取的主要技术措施。     

一种车窗防夹光纤传感系统

提出一种车窗防夹的多模光纤传感系统, 该系统安装在车窗框内,并基于斑纹图样的变化来获得信号.斑纹图样的变化被光电传感器阵列测量,其传感信号经过A/D转换器送进计算机内进行处理,然后,驱动车窗马达进行相应的动作.实验结果表明:该系统工作良好.     

Progressive crushing of fiber-reinforced composite structural components of a Formula One racing car

The present paper describes an experimental and numerical investigation on energy absorbers for Formula One side impact and steering column impact. The crash tests are performed measuring the load-shortening diagram and the energy absorbed by the structure. A finite element model is then developed using the non-linear, explicit dynamic code LS-DYNA. To set up the numerical model, tubes crushing testing are conducted to determine the material failure modes and to characterise them with LS-DYNA. The results presented in this study show that the composite structural components of the investigated Formula One racing car possess high value of specific absorbed energy and crash load efficiency around 1.1. The finite element simulations accurately predict the overall shape, magnitude and pulse duration in all the types of impact as well as the deformation and failure of the structures. Comparing the numerical data of the specific absorbed energy to the experimental results, the differences are around 10%.     

空间曲面零件的量具设计

对于批量生产的汽车车身零件的空间曲面和空间孔，需要用专用量具进行测量。文章就测量要素和测量基准的确定；检测方式；加工误差与鉴定基准等量具设计相关问题进行了论述。