The research of controller area network on hybrid electrical vehicle

It is of increasing importance to design and implement vehicle networks for transferring information between electrical control units on Hybrid Electrical Vehicle （HEV）. This paper presents a scheme of using Controller Area Network （CAN） technology to realize communication and datasharing between the electrical units on the HEV. The principle and communication protocol of Electrical Control Units （ECU） CAN node are introduced. By considering different sensitivity of the devices to the latency of data transportation, a new design procedure is proposed for the purpose of simplifying network codes and wiring harness, reducing assembly space and weight, improving assembly efficiency, and enhancing fault-diagnose in auto networks.     

The General Configuration of CEV1 Electric Vehicle's Electrical System and the Design of Its Control Sequence

The general configuration of CEV1 electric vehicle's electrical system and the design scheme of its control sequence are presented, which are modularized by using VMU as master control unit, PMU as power management unit, BMU as battery management unit. It is a rather advanced and practical general design scheme of electric vehicle, because the division of its module function is definite, which is advantage for research, manufacture and maintenance.     

电动车电驱动系统研究的回顾与展望

介绍了国内外电动车研究的基本状况、电动车的主要关键技术以及相关研究展望。     

Partial Discharge Characteristics in the Course of Aging within XLPE Insulation

This paper deals with the experimental study on the correlation between partial discharge （PD） characteristic parameters and corresponding aging degree of insulation in the course of the aging within eros,s-linked polyethylene （XLPE） insulation. The aging tests were performed on a section of 10 kV transmission cable by means of water needle method. The PD macroscopic characteristic parameters were found to be significantly dependent on the corresponding aging degree of insulation in the course of aging of XLPE, and different kind of aging stage has different characteristics. Beside, there are similar regularity but different PD amplitude in the course of aging of XI.PE insulation in different electrolyte, and their insulation life is different. Therefore, according to the chan ging regularity of the PD macroscopic characteristic parame ters within XLPE insulation judging the aging degree of XLPE insulation will be an effective method.     

The Studying of Virtual Token Passing Approach in ControlNet

MAC protocol of ControlNet uses Virtual Token Passing (VTP) to solve the medium access contention, to assure the deterministic and repeatability of message transmission. This paper presents the basic method that VTP uses to transmit real-time I/O message, explicit message and maintenance message in scheduled part, unscheduled part and guardband part respectively. On the basis of analyzing the factors of message transmission delay, the maximum message transmission delay in scheduled part is studied, and the result shows it can be determined, so the deterministic and repeatability of message transmission in ControlNet is validated.     

Drivetrain system of an ultracapacitor electric bus

This paper proposed a design of the drivetmin system of an electric bus with ultraeapacitor （UC） as the only on-board power source. The system includes three main parts, namely, UC bank, motor and the converter, vehicle management unit （VMU）. Analyses results in detail on the funetional design and ex-periments on work bench of each part were also presented, which validated the reliability of the system. Furthermore, driving results in field of the bus verified the feasibility of the design of the drivetrain sys-tem. The bus has very good dynamic performanees and shows a promising applieations prospeet in the short and medium route buses system.     

大起始套位相的幻数表示法和MAGEX87计算程序

本文报导了对大起始套位相幻数表示法的一些改进和晶体结构分析MAGEX计算程序的新版本, 采用了一种新的步骤来选择起始套衍射。对若干个晶体结构进行试算的结果表明, MAGEX87大起始套位相幻数表示法比MULTAN 82需要较少的计算时间, 而且效果比随机起始位相法好。     

THE FRONTIER ORBITAL ENERGV LIVEL AND ELECTRON SPECTRA OF SOME UNSVMMETRICAL BISAZO DERIVATIVES OF CHROMOTROPIC ACID CONTAINING HALOGEN GROUPS

The π electron molecular orbital energy level and electron spectra of some unsymmetrical bisazo derivatives of chromotropic acid containing halogen group were studied by HMO method.Results of calculations show that the wavelength of the maximum absorptive peak differs from experimental value by 8nm and the substituting position of electrophilic group agrees well with experimental value.We also discussed the red shift of electron spectra and the substituting position of e:lectrophilic group from these results.     

An oviraptorid preserved atop an embryo-bearing egg clutch sheds light on the reproductive biology of non-avialan theropod dinosaurs

Recent studies demonstrate that many avialan features evolved incrementally prior to the origin of the group,but the presence of some of these features,such as ...     

基于自适应融合的实时车辆检测

针对传统的车辆检测技术检测速度慢和精度低的问题,提出了一种融合注意力的自适应金字塔网络的交通目标检测算法（fusion attentiont adaptive pyramid network,FAAP-Net）,可以显著降低交通事故的发生率。为了降低计算复杂度,设计了一种轻量级的互补池化结构（CPS）,该结构在宽度和高度上采用了两组不同的池化组合,在保持高精度的同时,显著降低了网络的浮点运算数（GFLOPs）和参数量。为了解决智能交通系统特征图生成过程中的信息损失问题,通过将自适应注意力模块（AAM）和特征增强模块（FEM）引入自适应融合特征金字塔网络（AF-FPN）,以融入车辆检测的形状特征。针对车辆细节特征表征弱的问题,引入了一种按通道维度分组的注意力（SA）机制,以增强主干网络对不同车辆检测细节特征的关注,有效提取车辆细节的显著特征。在BDD100K数据集上的实验结果表明,FAAP-Net算法相比于传统算法,平均精度从30.3%提升到43.7%。