一种基于比幅比相测角解模糊方法

比幅比相测角是宽带被动雷达测向系统中的一种重要方法，由于比幅比相测角系统存在相位多值模糊，因此采用长短基线和幅度信息，提出了划分幅度差门限设置滑动粗相位的方法．并通过实验证实了其有效性，实现了比幅比相测角的解多值模糊，在实际工程应用上具有一定的实用价值和参考价值．     

多DSP处理器系统在超分辨测向处理器中的应用

介绍了4片ADSP21160组成的高速超分辨测向处理器，该处理器提高了系统的处理速度，实现了对目标测向的MUSIC算法研究了高速并行处理技术，该方法推动了MUSIC算法的工程应用．最后，将ADSP21160与TMS320C6201分别组成的处理系统进行了比较，实验结果证明ADSP21160更适合用在超分辨测向处理器中．     

基于AN2131Q实现TMS320C6711与PC机的USB通信

提出一种基于TMS320C6711的具有USB(通用串行总线)接口的高速数据传输的设计方案,对TMS320C6711和USB处理器AN2131Q的软硬件设计作了详细介绍.该设计方案很好地实现了TMS320C6711与PC机之间的USB高速数据传输.     

基于TL16C550C实现TMS320C6711的异步串行通信

为解决TMS320C6711在通信接口控制能力方面存在的缺陷,提出了一种基于TL16C550C实现TMS320C6711的异步串行通信的新方案。该方案采用一片可编程的自动流量控制专用车行异步接口芯片(TL16C550C)来扩展TMS320C6711的串行异步接口,结合简单的寄存器配置程序来实现TMS320C6711的高速异步串行通信。同时,给出应用电路实例及进一步改进的方法。     

基于DSP＋FPGA结构的图像跟踪系统的设计

介绍了一种基于DSP＋FPGA结构的小波图像处理系统设计方案,以高性能数字信号处理器TMS320C6711BFPGA作为核心,结合现场可编程门阵列,实现了实时数字图像处理．     

双H型比相测向天线的测向精度研究

本文简述了通信对抗中用来精确、快速测定无线电电台方位的测向天线的原理，建立了双Ｈ型比相测向天线的相位方向性函数和幅度方向性函数，用数值计算分析了天线之间的互耦与测向精度的关系；理论结果为实验数据提供了理论依据，同时也找到了提高测向精度的途径，在研制此类天线中有其参考价值．     

基线倾角对相位干涉仪测向的影响

在相位干涉仪测向系统中，通常都认为基线倾角对相位的影响是可以通过几何投影的方法得到等效基线来消除的．针对基线倾角的存在，从相位干涉仪测向原理出发给出了定性的分析，指出了基线倾角给相位干涉仪测向系统带来的测角错误，并通过实验的方法证实了其分析的正确性，在实际工程应用上具有一定的指导意义．     

基于DSP的虹膜图像采集系统

提出了一种基于红外光源的、以浮点DSP芯片TMS320VC6711为核心的虹膜图像采集系统，介绍了其工作原理、软硬件设计与实现．通过测试验证，此系统具有很高的稳定性和可靠性，为虹膜识别算法的研究提供了高质量的虹膜图像．     

TMS320C6711与I2C总线接口的实现

简单介绍了I2C总线,讨论了在TMS320C6711上扩展I2C总线的方案,并比较采用多通道缓冲串口(McBSP)和采用可编程逻辑器件这两种实现I2C总线接口协议的方法.从硬件连接和软件编程的方便性考虑,利用多通道缓冲串口(McBSP),用软件编程来模拟I2C总线协议,从而实现I2C总线接口的方法更简单,硬件设计更容易.并以TMS320C6711初始化视频解码芯片(SAA7111)为例,给出了相应的硬件电路以及模拟I2C总线协议的软件实现.     

基于TMS320C6711 DSK的实时视频图像处理系统设计

介绍了以TMS320C6711 DSK为处理平台的实时视频图像处理系统的设计，研究分析了系统的硬件结构及其各部分的功能、所选用的主要器件的特点以及工作方式，并阐述了该系统的软件设计和系统特点。     

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