侧面柱碰撞的研究

交通事故表明，车辆与柱状物发生侧面碰撞而导致乘员重度伤害的比例较高，因而对侧面柱碰撞的研究是必要的。基于力学理论对这种特殊的侧面碰撞形态进行分析，同时以乘员伤害和车身变形作为指标。对三种不同形式国产轿车的试验结果进行比较。可找出侧面柱碰撞与一般侧面碰撞间的差别，进而为车身侧面结构的改进提供参考依据。     

一种适用于沪杭磁悬浮工程的坐标系

为更好地满足沪杭磁悬浮工程全线施工定线的需要，提出了引用一种新型大地坐标系的设想,该坐标系仍以经纬线构成椭球面上的坐标格网，但点位则用长度量表示．由此不仅可统一全线用于施工定线的坐标系，而且能杜绝投影变形，方便而精确地求解长度和角度，这已由计算结果所证实.     

馈能式电动悬架的原理与试验研究

提出了一种新型的馈能式电动悬架,并对原理样机进行了试验研究.首先,对馈能式电动悬架的工作原理及结构方案进行描述;其次,根据某具体车型的后悬架系统参数,设计电机作动器样机并进行特性试验;最后,通过整车台架试验检验所设计的悬架系统在随动状态下的馈能特性和悬架特性.试验表明,低频大振幅工况时,随动状态下的电动悬架可在基本保证车辆性能的同时回馈部分电能.     

燃料电池混合动力瞬时优化能量管理策略研究

以提高燃料经济性为目标,采用基于瞬时优化的方法开展能量分配策略研究,并引入了蓄电池等价燃料消耗理论,将蓄电池电能消耗或者电能补充,等效为燃料电池发动机的燃料消耗量,并由此建立系统瞬时燃料消耗量函数.为保证蓄电池工作在最优的范围内,引入蓄电池的充电保持策略.仿真结果表明,按照等价燃料消耗量瞬时优化理论得出的优化结果,能提高燃料经济性,同时蓄电池SOC保持在合理范围内,对今后实车的研制具有一定指导意义.     

国内外汽车—油品—排放项目研究概述

为了减少汽车排放,满足日益严格的排放标准,20世纪后期以来国内外对燃油成分、性能影响排放的规律进行了大量研究,对美国AQIRP、欧洲EPEFE、日本JCAP和国内相关研究项目进行了总结,提出在日益严格的排放法规的基础上根据国内的炼油结构、燃油水平和当代及未来汽车先进技术进行燃油指标对排放的影响研究的必要性。     

Artificial anal sphincter with sensor feedback powered by transcutaneous energy transmission

This artificial anal sphincter (AAS) is used to help patients who are in severe incontinence. It consists of two parts. The first part is taken outside with patients. The second is implanted in the bodies to provide independent evacuation for patients. It is powered through transcutaneous energy transmission by the first part. There are two sensors in the second part. One sensor measures the pressure in the cuff-clamp around the recta. The other measures the pressure of the recta. As soon as the pressure measured by the later reaches the threshold, a signal is sent out to patients through wireless communication to alarm patients preparing defecation. Patients can give a start signal to begin defecating after they are ready. And they can also give a signal to stop defecating like a healthy person. With the aids of the novel medical device, patients can defecate as a healthy person. The first generation of this AAS is presented.     

Reflections on energy issues in China

Energy, which has a bearing on both economic and national security, is of importance and a major constraining factor to the economic and social development of China. The article analyses the current worldenergy status and development trend from the perspectives of resources, production and consumption and in thecontext of its implications on the environment and economic and social development, and explores opportunitiesand challenges for China's energy development. With a focus on the strategy of energy development in China,the author proposes a new energy development approach with Chinese characteristics whose main elementsare: energy-saving, high-efficiency, diversified development, environment protection, technology guidance andinternational cooperation. In other words, China is striving to build a reliable energy production, circulationand consumption system that is efficient, technologically advanced, low polluting and ecologically friendly. Along-term development strategy with priority on energy conservation, efficient utilization of primary energyand advanced electricity system is expounded in the paper. The author also describes the prospect of energytechnology development and stresses the implementation of energy strategy by further improving energy policyand related mechanisms, strengthening macro-management and the essential role of the market in resourceallocation so as to ensure the economic and social development of China through reliable energy supply.     

Deriving macroscopic fundamental diagrams from probe data: Issues and proposed solutions

Well-defined relationships between flow and density averaged spatially across urban traffic networks, more commonly known as Macroscopic Fundamental Diagrams (MFDs), have been recently verified to exist in reality. Researchers have proposed using MFDs to monitor the status of urban traffic networks and to inform the design of network-wide traffic control strategies. However, it is also well known that empirical MFDs are not easy to estimate in practice due to difficulties in obtaining the requisite data needed to construct them. Recent works have devised ways to estimate a network’s MFD using limited trajectory data that can be obtained from GPS-equipped mobile probe vehicles. These methods assume that the market penetration level of mobile probe vehicles is uniform across the entire set of OD pairs in the network; however, in reality the probe vehicle market penetration rate varies regionally within a network. When this variation is combined with the imbalance of probe trip lengths and travel times, the compound effects will further complicate the estimation of the MFD.To overcome this deficit, we propose a method to estimate a network’s MFD using mobile probe data when the market penetration rates are not necessarily the same across an entire network. This method relies on the determination of appropriate average probe penetration rates, which are weighted harmonic means using individual probe vehicle travel times and distances as the weights. The accuracy of this method is tested using synthetic data generated in the INTEGRATION micro-simulation environment by comparing the estimated MFDs to the ground truth MFD obtained using a 100% market penetration of probe vehicles. The results show that the weighted harmonic mean probe penetration rates outperform simple (arithmetic) average probe penetration rates, as expected. This especially holds true as the imbalance of demand and penetration level increases. Furthermore, as the probe penetration rates are generally not known, an algorithm to estimate the probe penetration rates of regional OD pairs is proposed. This algorithm links count data from sporadic fixed detectors in the network to information from probe vehicles that pass the detectors. The simulation results indicate that the proposed algorithm is very effective. Since the data needed to apply this algorithm are readily available and easy to collect, the proposed algorithm is practically feasible and offers a better approach for the estimation of the MFD using mobile probe data, which are becoming increasingly available in urban environments.     

基于AMESim的插电式并联混合动力汽车能量管理策略仿真分析

为了缩短混合动力汽车开发时间,减少开发成本,本文以插电式并联混合动力汽车为研究对象,针对设计指标进行动力系统参数匹配以及使用AMESim软件搭建了整车模型,然后设计了基于门限值的能量管理策略并使用AMESim软件中的Signal,Control库进行搭建。之后对已搭建完成的车辆进行动力性经济性仿真分析,其中经济性分析是在NEDC工况下进行的,验证了本文所搭建策略和整车模型的正确性和可行性。     

广东新型平板显示产业的促进政策探究

采用SWOT分析法,对广东省新型平板显示产业的现状与竞争态势进行了深入分析,提出了广东省新型平板显示产业发展的政策设计方向,并尝试设计了为更好更快地发展广东省平板显示产业的一系列促进政策与鼓励建设政策.