Extraction of metals from automotive shredder residue:Preliminary results of different leaching systems

The study is focused on the extraction of valuable metals from automotive shredder residue (ASR) by different leaching solutions. First, ASR samples were roasted at 600 °C to simulate a thermal treatme...     

OBD车载诊断系统综述

介绍了车载自诊断系统（OBD）的工作原理和组成,OBD的发展状况以及OBD在中国的应用状况;概述了OBD目前在重型车上的应用状况,阐述了OBD的局限性,并简要给出解决方案,最后对OBD系统的应用进行了简要的总结和展望。通过系统的介绍,使读者对OBD系统有较全面的认识。     

高速公路计重收费改造的施工组织管理

通过对浙江杭长高速公路的计重收费改造工程的特点分析,提出了切实可行的项目管理措施、质量控制方案和应急预案。该项目在多方的紧密配合与支持下按照既定方案展开工作,经过一个多月的紧张实施,最终顺利通过了检定工作。     

电动汽车用贮氢电池进展

本文论述了电动汽车用贮氢电池的现状,同其他汽车电池的比较、研究进展、性能目标、发展趋势和前景。     

应用于智慧物流服务的无人驾驶车产品设计

目的 探讨在人工智能、大数据、万物互联网络等技术支撑条件之下的,应用于智慧物流场景的无人驾驶车产品设计方法.方法 在智慧物流技术架构的基础上构建以无人驾驶车驱动的智慧物流服务技术架构,分析无人驾驶车作为服务媒介和服务参与者构建的物流服务场景以及无人驾驶车的行为和目的,在此基础上进行无人驾驶车产品设计.结果 无人驾驶车产品设计的主要任务是功能设计和表征设计.通过视图模型构建无人驾驶车的功能、内容和通道逻辑关系模型,使用参数化产品设计方法进行无人驾驶车表征设计.结论 本研究为在其他服务场景中的无人驾驶车产品设计提供了设计理论和方法参考,启发以无人驾驶车为媒介的智能产品服务系统设计理论与实践研究.     

Resource Load Prediction of Internet of Vehicles Mobile Cloud Computing

Load-time series data in mobile cloud computing of Internet of Vehicles (IoV) usually have linear and nonlinear composite characteristics. In order to accurately describe the dynamic change trend of such loads, this study designs a load prediction method by using the resource scheduling model for mobile cloud computing of IoV. Firstly, a chaotic analysis algorithm is implemented to process the load-time series, while some learning samples of load prediction are constructed. Secondly, a support vector machine (SVM) is used to establish a load prediction model, and an improved artificial bee colony (IABC) function is designed to enhance the learning ability of the SVM. Finally, a CloudSim simulation platform is created to select the per-minute CPU load history data in the mobile cloud computing system, which is composed of 50 vehicles as the data set; and a comparison experiment is conducted by using a grey model, a back propagation neural network, a radial basis function (RBF) neural network and a RBF kernel function of SVM. As shown in the experimental results, the prediction accuracy of the method proposed in this study is significantly higher than other models, with a significantly reduced real-time prediction error for resource loading in mobile cloud environments. Compared with single-prediction models, the prediction method proposed can build up multidimensional time series in capturing complex load time series, fit and describe the load change trends, approximate the load time variability more precisely, and deliver strong generalization ability to load prediction models for mobile cloud computing resources.     

The independent contribution of driver,crash, and vehicle characteristics to driver fatalities

Several driver, crash, and vehicle characteristics may affect the fatality risk of drivers involved in crashes. To determine the independent contribution of these variables to drivers’ fatality risk, we used data from single-vehicle crashes with fixed objects contained in the US Fatal Accident Reporting System. A multivariate logistic regression revealed that the odds ratio (OR) of a fatal injury increased with age, reaching 4.98 (99% confidence interval (CI)=2.01–12.37) for drivers aged 80+ compared with drivers aged 40–49 years. Female gender (OR=1.54, 99% CI=1.35–1.76) and blood alcohol concentration greater than 0.30 (OR=3.16, 99% CI=1.96–5.09) were also associated with higher fatality odds. In comparison with front impacts, driver-side impacts doubled the odds of a fatality (OR=2.26, 99% CI=1.92–2.65), and speeds in excess of 111 kilometers per hour (kph; 69 mph) prior to or at impact were related to higher fatality odds (OR=2.64, 99% CI=1.82–3.83) compared with speeds of less than 56 kph (35 mph). Three-point seatbelts were protective against fatal injuries (OR=0.46, 99% CI=0.39–0.53 compared with no belt). These data suggest that increasing seatbelt use, reducing speed, and reducing the number and severity of driver-side impacts may prevent fatalities. The importance of age and gender suggests that the specific safety needs of older drivers and female drivers may need to be addressed separately from those of men and younger drivers.     

计算机路桥网络收费系统的研究

介绍了计算机路桥停车收费系统与不停车收费系统的设计方法,指出了两种收费系统实施的关键技术难点及相应的解决方案.     

Validation of a Source–Receiver Model for Road Traffic-Induced Vibrations in Buildings. II: Receiver Model

The objective of part II of this paper is to couple the validated source model for free-field traffic-induced vibrations, which has been presented in part I of the paper, to a receiver model that incorporates the structure and accounts for dynamic soil–structure interaction. The incident wave field is applied to the structure and the response is calculated using a subdomain formulation for dynamic soil–structure interaction. A finite element method is applied to the structure, while the unbounded soil domain is calculated with a boundary element method using the Green’s functions of a homogeneous or a layered half-space. The results of elaborate in situ experiments in and around a single family dwelling during the passage of a truck on joints in a concrete pavement and on a plywood unevenness, are used for the validation of the numerical prediction model. The predicted structural response during the passage of a truck at a speed v = 50?km/h is compared with the experimental results. The agreement between the numerical and the experimental results is very good for the passage on the plywood unevenness and satisfactory for the passage on the joints between the concrete plates.     

Design and implementation of a leader-follower cooperative control system for unmanned helicopters

In this paper, we present a full scheme for the cooperative control of multiple unmanned aerial vehicle (UAV) helicopters. We adopt the leader-follower pattern to maintain a fixed geometrical formation while navigating the UAVs following certain trajectories. More specifically, the leader is commanded to fly on some predefined trajectories, and each follower is controlled to maintain its position in formation using the measurement of its inertial position and the information of the leader position and velocity, obtained through a wireless modem. More specifications are made for multiple UAV formation flight. In order to avoid possible collisions of UAV helicopters in the actual formation flight test, a collision avoidance scheme based on some predefined alert zones and protected zones is employed. Simulations and experimental results are presented to verify our design.