基于LIN总线的汽车车窗控制系统的设计

传统的汽车车窗多采用机械式的控制方法,存在着不易操作、布线复杂、电磁干扰严重等问题．随着汽车电子化的不断提高,控制节点的不断增多,传统线束的单对单连接方式已经无法满足人们的需要．汽车总线技术因其独特优势,能够很好的解决连线增加所带来的问题,因此采用总线技术成为汽车发展的必然趋势．由于汽车车窗工作频率较低,因此对数据传输的速率要求较低．若采用CAN总线通讯成本较高,而LIN总线作为一种辅助的总线网络,仅使用一根线就能够实现数据的通讯,因此使用LIN总线可大大节省成本．本文设计了一种基于LIN总线的汽车车窗控制系统,实现了对汽车车窗的总线控制,为实际应用提供了一种可行的解决方案．     

M68HC908EY16在汽车LIN总线灯控系统中的应用

结合现有汽车电子技术及汽车网络技术的发展概况,提出了一种基于Freescale8位单片机M68HC908EY16的LIN总线汽车灯光控制系统解决方案.简要介绍了LIN通讯协议,结合本芯片较为详细的介绍了LIN总线技术在灯控模块中的应用.完成了灯控系统协议的制定,并给出了系统硬件原理图以及软件设计流程.     

基于CAN/LIN总线的车载通信网络设计

汽车上的电控系统数量越来越多,为了提高电控单元之间互相通信性能和降低导线成本,提出了一种基于CAN/LIN总线的车载通信网络,将CAN总线网络应用在高速的驱动系统,LIN总线网络应用在低速的车身车灯控制系统,两者通过网关进行数据交换.仿真测试表明,本车载通信网络的设计合理,通信可靠,能够实现CAN/LIN总线网络之间的数据传输.     

采用SAE J1939的CAN/LIN总线汽车内部网设计

以国产汽车为应用对象,设计以CAN总线为主、LIN总线为辅,并以当前应用最广泛的SAE J1939协议为主干协议的汽车内部通信网络,将汽车动力系统和车身控制系统的通信网络分成高速CAN网络、低速CAN网络和LIN网络三部分。选取Philips公司的P87C59等器件,设计了CAN、LIN总线节点、主控制器节点和相应的连接节点。此设计方案具有成本低、可扩展性高等特点,可作为适用于华晨、奇瑞、吉利等国产汽车内部网设计。     

在低速电子通信网络中LIN总线协议的应用分析

LIN是一种串行通讯网络,交换数据的形式有多种,LIN总线总是起辅助的作用,在没有CAN总线的地方,使用LIN总线的成本较低,本文基于LIN技术的定义,对在低速电子通信网络中LIN总线协议的应用进行了初步解析。     

采用SAE J1939的CAN/LIN总线汽车内部网设计

以国产汽车为应用对象，设计以CAN总线为主、LIN总线为辅，并以当前应用最广泛的SAE J1959协议为主干协议的汽车内部通信网络，将汽车动力系统和车身控制系统的通信网络分成高速CAN网络、低速CAN网络和LIN网络三部分。选取Philips公司的P87C591等器件，设计了CAN、LIN总线节点、主控制器节点和相应的连接节点。此设计方案具有成本低、可扩展性高等特点，可作为适用于华晨、奇瑞、吉利等国产汽车内部网设计。     

基于C8051F040的CAN_LIN总线通信接口设计

车载总线是车载电子系统间通信的基础,其中CAN和LIN总线比较常见,CAN与LIN总线为两种不同通信协议下的通信网络。本文研究了一种以C8051F040单片机为核心的CAN总线和LIN总线接口电路,给出了电路的设计方法和相关软件流程。     

基于LIN总线车灯控制系统的研制

于Local Interconnect Network(LIN)汽车总线技术, 在DP-51H单片机数据通信综合仿真实验仪上提供一个实现LIN-bus通讯网络软硬件调试/ 仿真的环境, 综合考虑汽车在特殊环境下的工作性能, 研制了基于LIN协议的汽车车灯控制 系统. 该系统根据LIN协议开发设计了智能化主节点和从节点, 完成了主从节点的硬件选型 和电路设计以及软件分析和程序实现. 在车灯系统的设计中, 节点间的LIN通讯完全符合LIN 1.2规范协议, 该协议基于通用的UART/SCI硬件接口, 采用ISO9141单线传输标准, 采取单 主多从的总线型拓扑结构并提供方便的用户应用编程接口.     

基于LIN总线的车身控制系统设计

文章针对总线式车身系统设计,对CAN/LIN混合网络进行深入研究,给出车身混合网络结构及主控节点的设计与实现。在车身控制系统中,将CAN总线连入高速驱动系统,LIN总线连入低速车身系统中,通过主控节点将二者构建成混合控制网络,使其控制系统兼具可靠性、高性能和低成本优点。在器件选型上采用FREESCALE典型汽车电子芯片和智能触点检测模块,既实现了可靠网络控制功能,同时也可降低车辆电子系统的开发、生产成本,具有较高实用性。     

车载总线自动化测试系统的设计与应用

随着现代汽车技术的迅速发展,当汽车网络上电控单元数量越来越多,总线结构越来越复杂时,测试工作量将成倍增长,传统手动测试已无法满足测试需求。通过对车载网络总线测试的研究,分析了测试方法的优缺点,提出了一种车载网络自动化测试系统。该系统以Vector的工具链为测试平台,通过C#语言开发的上位操作平台对系统进行配置与控制以完成车载网络CAN(controller area network)总线、CANFD(CAN with flexible date-rate)总线、LIN(local interconnect network)总线的测试,解决了以往测试过程中通用性差的缺点,提高了测试效率。     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with     

Journal of Donghua University ( English Edition) Contents of Volume 31

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Brief Introduction to “Journal of Jilin University( Science Edition) ”

<正>"Journal of Jilin University(Science Edition)"is a comprehensive academic journal in the fields of science sponsored by Jilin University and administrated by the Ministry of Education of the Peoples Republic of China.The journal started publication in 1955.The original name at starting publication was"Journal of Natural Science of Northeast People University",which was changed into"Acta Scientiarum Naturalium Universitatis Jilinensis"in 1958 owing to the name change of the university.The present journal name has