电动汽车整车控制器BootLoader功能开发

传统的电动汽车整车控制器开发中,对程序的烧写是通过BDM调试接口实现的,该方法不仅在控制器应用程序开发阶段会影响开发效率,而且会给后期整车控制器升级维护造成极大的不便.通过嵌入式系统引导加载程序(即BootLoader)对解决上述问题具有较强的实际意义.本文提出了整车控制器开发中BootLoader功能实现的整套设计与解决方案,并将该方案应用到实车运行中.最后,通过实际应用的测试与分析,结果表明该功能具有极高的可行性与有效性.     

嵌入式网关在远程视频监控中的应用研究

设计并实现了一个基于ARM微处理器的CAN/Ethernet嵌入式网关,并将其应用于远程视频监控系统中.监控前端控制摄像头采集视频数据,压缩之后通过CAN/以太网嵌入式网关实现视频数据和控制信息的远程交互.其硬件系统由集成了CAN控制器的ARM微处理器LPC2294、网卡芯片RTL8019AS以及CAN收发器组成.软件...     

基于CAN总线的中低速磁浮列车悬浮控制调试监控系统

为了便于监控悬浮控制器状态和现场调试,构建了基于CAN总线的悬浮控制调试监控系统,设计了CAN接口硬件电路、CAN通讯协议与CAN通信控制程序,并在上位机与悬浮控制器之间予以实现。     

水泥路面共振式破碎车的控制系统设计与分析

采用EPEC控制器实现水泥路面共振式破碎车电气系统,完成了基于CAN总线技术的控制系统结构设计.介绍CAN open总线协议在EPEC控制器和人机界面中数据收发的编程方法,给出破碎机构的控制流程以及车载监控操作界面的设计.调试结果表明,该系统运行稳定可靠,满足了水泥路面共振式破碎车的操作和施工精度要求,CAN open总线技术的应用符合系统的通讯要求,取得了令人满意的工程应用效果.     

基于ARM7＆uCLinux的BootLoader设计

本文介绍了一种基于嵌入式微内核UC／OS—II的BootLoader的设计方法,利用UC／OS—II的微内核及其支持多任务的特性实现了以PC机超级终端作为目标机用户界面,通过NET在线高速下载UCLinux内核和文件系统,便于UCLinux内核在线下载与基于UCLinux应用程序的调试,且实现了将内核与根文件系统从Flash中加载到ARM中这一BootLoader引导操作系统的基本功能。     

基于WINCE的CAN总线设备驱动研究

为解决嵌入式WINCE操作系统下管理与操作CAN现场总线设备的应用难题,采用WINCE设备驱动程序实现对CAN控制器访问并操作,并通过应用程序访问设备驱动程序来实现操作系统核心对CAN控制器操作并管理.实现中首先搭建以ARM9s3c2440为硬件核心的处理平台,在处理平台上扩展连接CAN总线设备,通过在核心处理器上移植WINCE操作系统,完成WINCE下CAN设备的流接口驱动程序,然后编写应用程序访问CAN设备的驱动程序.实现结果表明在WINCE操作系统下能有效地操作CAN总线设备.     

嵌入式电梯群控系统中关键技术的研究

为解决嵌入式电梯群控系统中管理与操作CAN现场总线设备的应用难题,采用WINCE设备驱动程序来实现对CAN控制器访问并操作,然后通过应用程序访问设备驱动程序来实现操作系统核心对CAN控制器操作并管理.实现过程中首先搭建以ARM9S3C2440为硬件核心的处理平台,在处理平台上扩展连接CAN总线设备,通过在核心处理器上移植WINCE操作系统,完成WINCE下CAN设备的流接口驱动程序,然后编写应用程序来访问CAN设备的驱动程序.实现的结果是WINCE操作系统下能有效地操作CAN总线设备.     

电能管理系统中智能数据网关的设计与实现

文章提出一种基于ARM微处理器和CS8900A以太网控制器的智能数据网关的设计方法与实现过程,以ARM(LPC2292)和CS8900A为硬件核心,以前后台系统和TCP/IP协议为软件核心,进行电能计量管理系统中智能数据网关的设计,该网关实现对电气量的采集、缓存、格式转化和上传等功能;论述了网关的硬件设计、TCP/IP协议的裁剪与实现和软件设计,系统经调试后运行表明,符合与上位机通讯的协议要求。     

基于ARM S3C2410的嵌入式ZigBee网关设计

为实现ZigBee无线传感器网络与Internet之间的数据交换,设计实现了一个基于ARM S3C2410处理器的嵌入式ZigBee网关.系统以ARM9处理器芯片S3C2410与ZigBee CC2530芯片为核心,外部扩展多个功能模块组成硬件平台.在移植嵌入式操作系统WinCE6.0的基础上,开发设计了相应应用程序来构建ZigBee嵌入式网关系统.测试结果表明:该网关系统实现了Internet与ZigBee无线传感器网络之间数据的交换;具有成本低、稳定性强、易于推广等特点.     

基于uClinux的测井仪器调试台架前端机软件设计

介绍一种基于uClinux系统平台的调试台架前端机软件设计方案,软件由驱动程序和应用程序两部分构成。为满足仪器测试中实时高速大数据通讯要求,实时控制局域网总线(CAN)和井下仪器总线(DTB)通讯功能由驱动程序完成。应用程序实现人机交互、与上位机网络通讯等实时性要求不高的功能。驱动程序与应用程序之间的信息交换由异步通知信号实现。所提方案已成功应用到微电阻率扫描、阵列感应、多极阵列声波等系列化成像测井仪器调试台架之中,并且加快了这些仪器的研制及维护效率。     

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.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

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.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

Jane Eyre——A Feminist In The 19th Century

In the 19th century the society was controlled by men, and women were just appendants of them, they had not any rights and freedom. But Jane was an exception, she showed some characteristics of early feminist. Jane showed her characteristics of feminism in three aspects: rebellion, equality, and independence. These characteristics were helpful to her success, and feminism is the only way out for women of that time.     

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-