高速安全控车探析

在执行特殊任务中,武警、公安需要高速驾驶车辆,那么高速下如何做到安全控车是摆在面前的难题。本文主要从弯道、直道避障碍物高速驾驶安全控车,以及在高速失控下补救措施等方面进行探析,希望这些方法能够对执行特殊任务的人员有所帮助。     

External costs of electric vehicles

Electric vehicles (EV) are often considered a promising technology to decrease external costs of road transport. Therefore, main external cost components are estimated for EV and internal combustion engine vehicles (ICEV). These include costs of accidents, air pollution, climate change, noise, and congestion. All components are estimated over the product lifetime and, where appropriate, differentiated according to fuel type, vehicle size as well as emission location and time. The advantage of this differentiation is, however, compensated by high uncertainties of most cost estimates. Overall, the external costs of EV and ICEV do not differ significantly. Only for climate change, local air pollutants in congested inner-cities, and noise some advantageous effects can be observed for EV. The advantages depend strongly on the national electricity power plant portfolio and potentially also on the charging strategy. Controlled charging might allow for higher emission reductions than uncontrolled charging of EV.     

Social and spatial effects of transforming the private vehicle fleet in Brisbane,Australia

Transformation of the motor vehicle fleet has been an important feature of the world’s peak car phenomenon. Very few urban transport studies have explored such important changes in large urban cities. Using an innovative green vehicle datasets constructed for 2009 and 2014, this paper investigates the ongoing change in urban private vehicle fleet efficiency (VFE) in Brisbane. The spatial patterns of VFE change were examined with social-spatial characteristics of the urban area. The results showed that the social and spatial effect of VFE changes remain uneven over urban space. The inner urban areas have experienced higher level of VFE change, whilst people in the outer and oil vulnerable areas showed a low tendency in shifting to more efficient vehicles. The implication of VFE change for future household vehicle adoption was also evaluated based on a cost-benefit analysis of new vehicle technology costs and expected fuel savings for households that choose a fuel efficient vehicle. The results show that imposing a stronger national fuel economy target in the long term would accelerate evolution of vehicle fleets and oil vulnerability reduction in Brisbane.     

俄罗斯铁路新一代货车

介绍了近年来俄罗斯铁路对新一代货车、转向架的技术要求。通过采用可靠性参数指标、提高轴重、加大车体尺寸等一系列措施，可明显提高运行安全和运输效率。     

无人驾驶汽车行车环境下鲁棒性声学特征提取算法（双语出版）

无人驾驶汽车在行车过程中，需要通过视觉感知和听觉感知来构建当前周围环境模型，声学事件检测是听觉感知系统构建模型的核心所在。行车环境下声学事件检测系统面临着复杂而强烈的噪声挑战，尤其是行车过程中的风噪。声学事件检测中，常用的声学特征梅尔频率倒谱系数（MFCC）对噪声干扰十分敏感，为了解决这一问题，提出一种谐波梅尔频率倒谱系数（HMFCC）的鲁棒性声学特征提取算法，用于声学事件的目标分类。该算法通过声学信号的谐波模型与MFCC算法相结合，提取目标声学信号中的共振峰频率，改进传统Mel滤波器组，从而增强HMFCC中目标声学信号的中高频分量。研究结果表明：在不同的风噪环境下，基于HMFCC声学特征的检测结果具有较高的精准率和召回率，且在低噪和强噪环境下HMFCC和MFCC之间分类效果差异明显；低噪环境下，几种声学事件的HMFCC特征分类的平均精准率和召回率分别达到82.66%、84.15%，而基于MFCC特征分类检测的平均精准率和召回率只有73.93%、74.61%；随着风噪增强，MFCC特征分类精度严重下降，平均精准率和召回率仅为54.15%、44.95%，HMFCC特征在强噪环境下的平均精准率和召回率为72.16%、69.87%。行车环境下，HMFCC特征不仅可以提高分类的准确率，而且表现出对噪声不敏感的特性。     

布良斯克机器制造厂及其货车产品介绍

介绍布良斯克机器制造厂的概况及该厂生产的主要货车产品.     

汽车的电量平衡计算

随着汽车上用电器的增多,在汽车电气系统的设计中,整车电气系统的电量平衡必须进行计算。一些文献对电器电量平衡计算进行了论述,但大多使用一些前人的"经验参数"进行计算,而没有给出令人信服的、基于严密推理的计算方法。本文翔实、系统地给出了整车电气系统的电量平衡具体的计算公式和方法,并结合实例阐述了这些方法的应用。     

宝来轿车柴油发动机电控泵喷嘴电磁阀的检测方法

泵喷嘴电磁阀是宝来轿车柴油发动机电控泵喷嘴系统的重要执行器,在发动机故障诊断时,根据各缸显示区的泵喷嘴状态值,利用万用表按照电路图检测泵喷嘴电磁阀电阻及连接电路,以提高故障诊断效率。     

出口马达加斯加米轨漏斗车的研制

介绍了出口马达加斯加米轨漏斗车的技术特点、技术参数、主要结构、卸货操作过程及计算试验结果。     

广州地铁三号线车辆门角焊接裂纹的防止

以广州地铁三号线车辆为例,主要从生产环境、工艺、规范参数等方面介绍了地铁车辆铝合金车体门角焊接裂纹的防止措施,以及铝合金门角焊接工艺特点。