基于STC89C54RD+单片机的点阵LED显示屏的设计

以单片机系统组成的点阵LED显示屏开发过程.系统采用上-下位机的结构构建,上位机PC可通过串行通信接口实现对下位机LED显示系统显示参数的设定.下位机以LED屏的显示电路和单片机控制电路为核心,实现点阵LED屏以多样化的方式显示各种信息的功能,同时可实现本地温度采集、显示和本地时间实时显示的功能.     

点阵结构技术在航天飞行器的应用分析

未来航天飞行器向着隐身化、多功能化、智能化等方向发展,对飞行器结构系统提出了轻质、结构功能一体化等需求.点阵结构是先进轻质超强韧材料之一,是实现轻质结构功能一体化的有效载体.介绍点阵结构技术的发展与应用,对点阵结构技术在未来航天飞行器的应用前景进行了初步探讨,并指出点阵结构在航天飞行器的应用方向主要包括点阵夹层圆柱壳结...     

耦合反应扩散体系中的超点阵斑图

采用双层耦合的布鲁塞尔(Brusselator)模型研究了超点阵斑图的形成机制.理论分析和数值模拟结果表明,只有在具有较短波长图灵模的系统中才能产生超点阵斑图.将不同类型的斑图进行耦合,得到了超六边形斑图和黑眼斑图等超点阵斑图.本工作还在反应扩散系统中首次得到了长方形斑图.     

RMX环境下高性能数控系统中的汉字显示

论述了在INTEL RMX实时操作系统环境下,显示不同大小汉字的方法,包括:从CCDOS汉字点阵得到常现大小(24×24)的RMX系统的点阵字模;将RMX系统下常规大小的点阵字模进行放大变换;由常规字模生成矢量汉字,以获取小号汉字.该技术已成功用于32位高性能数控车床系统.     

基于FPGA控制的LED点阵汉字滚动显示器的设计

主要研究基于VHDL语言和FPGA的LED点阵汉字滚动显示器的设计。在介绍16×16LED点阵块工作原理的基础上,给出了基于FPGA的系统硬件电路,以及LED点阵实现汉字滚动的设计方法,并在QuartusⅡ软件集成开发环境下对整个系统的软件进行了仿真测试,实验仿真及硬件测试结果表明设计完全满足要求。该设计具有较为重要的应用价值。     

超高亮LED点阵信息显示系统的设计与实现

介绍一种超高亮LED点阵信息显示系统：选用超高亮LED构成点阵屏,采用静态显示方式,用锁存器驱动LED发光,提高显示亮度,在室外阳光下也有很好的显示效果．给出系统的电路图,介绍系统的工作原理、获取汉字点阵数据的方法以及PC机与点阵屏通信的方法．     

基于Matlab的彩色图形界面点阵生成技术

为了解决嵌入式系统彩色界面开发遇到的彩色图形点阵生成的问题,利用Matlab的图像处理函数和强大的矩阵运算功能设计一个可行的算法.并针对传统方法操作复杂,转换失真、数据溢出、图片混合和与C语言匹配等问题,对该算法进行优化.使用以DSP30F6010A为核心处理器和LMT057DNAFWU为彩色显示器的实验系统,验证该方法.结果显示,该方法转换后的图片失真小,而且兼容性好,可用于大部分的图片格式转换,图形点阵适用于嵌入式系统的彩色界面开发.     

简单的方法完成16×16点阵屏的设计

LED点阵显示屏越来越多的应用在车站、广场、商店。为了说明LED点阵显示的原理,本文介绍了一种由单片机控制的16＊16的点阵显示屏,该系统利用低成本的单片机来控制LED显示屏的显示,简化外围接口电路构成一种成本低廉的汉字显示系统。该电路通过仿真和实物测试,获得良好的显示效果,而且具有体积小,硬件电路结构简单和容易实现等特点。     

基于PC机的LCD实时显示控制系统设计

给出了一种基于单片机89C51和PC机的液晶LCD实时显示控制系统设计方法.显示信息以BMP格式存储,在PC机中转化成可以在LCD显示的点阵格式,并经串口送单片机处理后送LCD显示.该系统可以实时接收显示数据,由于采用了非易失性RAM作为存储单元,系统可以脱机运行.PC机发送程序采用VB6.0设计,并利用MSComm控件完成串口通信功能.     

矢量数据与位映象数据之间的转换技术研究

以内存缓冲区为虚拟设备,提供了一种与设备无关的矢量数据与位映像数据之间的转换方法.该方法特别适合于嵌入式系统汉字点阵及图形点阵显示以及非标准打印设备的输出等方面的应用.     

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.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

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