动态驱动LCD视频控制芯片的设计

介绍了一种功能较完备的动态驱动LCD视频控制芯片的设计．通过借鉴已有的同类显示控制器的设计经验,完成了系统的功能定义和系统结构设计．根据“自顶向下”的设计思想,将系统进行层次化功能划分,并用Verilog硬件描述语言对各模块进行了RTL实现．对电路的逻辑功能和时序关系用Modelsim软件进行了仿真验证,结果表明该动态驱动LCD视频控制芯片实现了预定的设计指标．     

LCD定标器中输入格式测量的设计实现

从LCD(液晶显示器)显示系统中定标器的输入视频信号和定标器工作参数入手,分析和确定需要测量的输入控制信号极性、输入信号周期特性和输入信号有效区域特性等参数．提出用计数器标定各输入信号间时序关系的测量构思和原理,实现输入格式测量的目的．在实现测量的过程中,设置寄存器保存各标定时刻点计数器的值,根据各时刻点的对应关系得到测量结果．该设计可以快速准确地测量输入信号格式,满足定标器稳定工作的需要．     

一种LCD显示控制器的设计与实现

从LCD显示控制器芯片的设计方案,介绍了LCD控制器的特性,重点描述了该LCD控制器中主要模块的设计.用Verilog硬件描述语言对所设计的系统进行了功能描述和仿真、验证,并给出了RTL级的仿真波形.该LCD显示控制器具有较好的可移植性,稍作改动就可以应用于不同类型的LCD显示控制.     

平板显示器中定标器的时序约束条件

在分析平板显示器中的定标器系统结构的基础上,提出了三个时序约束条件：定标器输出的显示帧速率必须和输入的帧速率一致;异步FIFO不能上溢和下溢;Line Buffer不上溢和下溢,并推导了相应的公式．当满足这三个约束条件时,定标器中的FIFO和行缓冲区不会上溢或下溢,显示帧与输入帧同步,解决了定标器的时序问题．用硬件描述语言对定标器芯片进行了仿真,结果显示,每一行的数据输入结束时间早于数据读出结束时间,同时这两者的时差小于输入数据时间,输入行数与输出行数始终相差5行左右,小于行缓冲区的行数,很好地验证了提出的理论．     

嵌入式系统外围接口电路的复杂可编程逻辑器件实现

为简化PCB布板。增强系统功能，提高系统的速度、抗干扰性、可靠性．提出一种用Altera公司CPLD芯片EPM7128S实现MCU外围接口电路的方法．在环境监测仪的MCU外围接口电路中．根据其功能结构与宏单元特点。利用VerilogHDL硬件描述语言和MAXplus-Ⅱ设计工具软件．在单片CPLD上设计了MCU与A／D转换芯片、FlashMemory、LCD及键盘4个模块的接口电路．对各个模块进行了编译、综合和仿真．实验表明．在一片CPLD芯片EPM7128S上。可实现多种接口功能．简化接口硬件连接．提高译码速度，编程方便灵活．     

基于VMM的LTE小区搜索模块验证

随着芯片设计规模和复杂度的增加,功能验证变得越来越复杂,验证面临着诸多挑战。有统计数据显示,验证工作占整个设计开发工作60%～80%的时间。在长期演进系统(long term evolution,LTE)中,小区搜索是一个非常关键的过程,是移动终端开机后首先要做的步骤。小区搜索的性能好坏直接影响LTE系统后续过程的进行,对LTE系统的性能有很大的影响。以LTE系统小区搜索模块为例,简要介绍了VMM(verifacation methodology man-ual)验证方法学,并基于VMM验证方法学搭建了小区搜索模块验证平台,对小区搜索模块进行了全面的功能验证。验证结果表明,本模块能够完成预期的目标,采用VMM验证方法学可以极大地提高验证效率,缩短验证周期。     

基于SOPC的液晶图形显示系统设计

为了克服传统液晶图形显示系统成本高、可移植性差等缺点,设计了基于SOPC（system on programmable chip）的液晶图形显示系统.介绍了该系统的总体结构和各功能模块,利用Avalon总线将Nios Ⅱ、数据缓存区以及LCD控制器联系起来.在对LP064V1真彩液晶屏工作时序分析的基础上,详细介绍了LCD时序产生器的VHDL设计,实现为LCD提供扫描时序信号和图形数据的功能,并给出在Nios Ⅱ IDE中,控制系统进行图形显示的C语言编程思路.该方案接口灵活,操作简便,移植性好,便于扩展,可很好地降低系统成本.     

一种基于DRFM的数字PARC设计

传统的定标器已不能满足对多极化SAR雷达的标定需求,迫切需要采用一种新型的标定方法对多极化SAR雷达的极化特性及精度进行标定。该文首先对极化定标器进行了系统级的概述,并对现有极化定标器的局限与不足进行了定性分析。在此基础上,提出了一种基于DRFM的数字化极化有源定标器(Polarimetric Active Radar calibrator,PARC)的设计,对设备组成、功能与原理进行了详细论述,为未来PARC的设计提供了一种新的思路。     

基于RTL8019AS以太网通信接口的研究

介绍了一种以STC89C52RC为主控芯片的嵌入式系统设备接入Internet的技术,阐述了网络接口芯片RTL8019AS的内部结构及特性原理,并且根据RTL8019AS的特性和原理设计了以太网通信的硬件电路和相应的软件编程,实现了网络协议栈的内嵌和网络接口卡驱动等功能.经实验验证,该系统能够通过网络接口与远程机进行数据传输,并取得预期的效果.     

数字解码器的千兆网传输控制设计与实现

海量音视频信号的网络传输对系统通信的可靠性和稳定性提出更高的要求．针对该问题,提出FPGA配置千兆以太网控制芯片AX88180的硬件实现方案．通过VerilogHDL语言分模块实现网络传输系统的各个功能．设计了初始化模块,令AX88180与88E1111建立RGMII通信模式;然后设计了数据接收和发送模块,对UDP、ARP、ICMP和IGMP协议进行解封装和封装,为数据链路层和应用层提供中间连接．通过网络抓包工具Ethereal监测实时数据,验证系统良好的网络连接状况;使用数字解码器的软件功能统计传输速率和丢包率,验证此系统的通信速率符合MEPG-2标准,丢包率满足流媒体通信标准．     

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     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

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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