基于DSP+MCU的小型捷联惯性导航计算机系统

结合现代导航技术发展的特点,设计了一种基于DSP的捷联惯性导航计算机.该导航计算机采用DSP 单片机的双CPU体系结构,DSP主要负责数据计算,而单片机主要负责数据采集与系统级的控制,同时CPLD完成译码和控制.通过DSP的HPI口来实现单片机与DSP的数据交换.给出了系统的硬件结构框图和程序设计流程图,利用本方案,对于实现军事和工程领域中导航系统微小型化、降低系统成本和体积具有重要意义.     

基于多级决策的多智能体自动导航车调度系统

提出基于多级决策和协作学习的方法来建立自动导航车 ( AGV)调度系统中每个 AGV所需要的动态分布式调度策略 .系统中的每一个 AGV都由一个具有两级决策能力的智能体控制 :在选择级 ,智能体采用 Markov对策框架下的强化学习方法 ,以根据其他 AGV当前的子任务建立自己的最有反应子任务 ;在行动级 ,智能体通过强化学习建立优化的动作策略来完成由选择级确定的子任务 .AGV调度仿真结果证明 ,该方法能提高系统的产量 ,并在零件到达比变化时保持输出产量的稳定     

基于DSP的开关磁阻电机速度控制器的设计研究

把数字信号处理器DSP应用于开关磁阻电机调速系统SRD中,该系统利用DSP高速采样及高速运算的特点,用脉冲宽度调节PWM技术的控制方法实现了速度闭环控制.主要研究通过位置反馈实现闭环速度控制;采用TMS320LF2407芯片作为控制芯片,组成具有人机交互接口的硬件电路;采用模块化编程的方法编写了控制算法和接口电路的程序,从而实现了开关磁阻电机SRM的全数字化控制.     

一类自主移动小车的停车控制方法

针对港口集装箱运输的自主移动小车(AGV)存在正常工作模式和停车模式的特点,提出了一种新的停车控制方法:从AGV的当前位置到待泊车位间规划出一条最佳行驶路径,然后用模糊逻辑控制(FLC)AGV按规划路径行驶;并用遗传算法对FLC隶属度函数中的参数进行优化.仿真结果表明该方法可行有效.     

无刷直流电机全数字智能伺服控制系统

应用TMS32 0X2 40系列DSP芯片设计了一套无刷同步电机全数字智能伺服系统。该系统充分利用了DSP丰富接口和运算速度快的特点 ,使所设计的系统硬件简单 ,并采用智能控制策略对系统进行控制。实验结果表明 ,该系统具有良好的动态和静态特性     

基于 DSP的光电探测器数据采集

文章介绍了以DSP芯片TMS320F2812为核心开发的光谱仪数据采集和控制硬件系统,在DSP开发环境Code Composer Studio v3.3下编程实现对滨淞公司NMOs线阵探测器的驱动、数据采集和其它辅助控制.由于该型号的DSP芯片具有高效率的硬件和指令集、丰富的外设配置、灵活的中断设置以及良好的稳定性,系统在光谱仪数据获取中具有良好的应用前景.     

基于TMS320VC5410数据采集系统的硬件设计

提出了一个基于DSP TMS320VC5410的数据采集系统的设计,给出了该系统的总体设计方案和具体硬件电路,包括系统手动复位电路的设计、CPLD在DSP数据采集系统中的控制分析、DSP与A/D芯片的连接等.实验表明:该系统结构清晰,电路简洁,易于实现.     

双通道DSP角度信号视频处理系统的设计

设计了一种以2个TI TMS320C6416高性能定点DSP芯片为核心处理单元,Altera Cyclone Ⅱ系列的EP2C50 FPGA芯片为控制单元的双DSP视频处理系统.该设计充分利用TMS320C6416处理速度快,接口资源丰富,定点数据处理能力强及EP2C50灵活可编程性、控制能力强的特点,利用EMIF口将DSP与FPGA互连,具有双通道同时高速处理,并行输出效果好等特点,满足了2路图形同步中心对称显示要求.     

无缓存流水线生产系统中AGV调度问题的研究

针对无缓存流水线生产系统中的AGV(automated guided vehicle)调度问题提出了复合评分的启发式调度算法,降低了系统中AGV执行任务的间隔等候时间.首先,通过建立数学模型,对目前主流的AGV规模估计方法做出了改进.其次,提出了一种新的基于复合评分禁忌搜索的AGV前瞻调度算法.不同于目前主流的以空驶距离为优化目标的调度算法,该算法能够以最小化工件延误时间、最小化AGV空驶距离等多目标来统筹调度AGV.最后,为验证所提算法的有效性,从多个角度与已有算法进行了实验对比.仿真实验结果表明,相较于其他算法,提出的前瞻调度算法能够更有效地解决无缓存流水线生产系统这一新场景的AGV调度问题.实车实验也证明了该算法在实际生产中的有效性.     

DSP永磁同步电机数字交流伺服系统硬件设计的研究

以美国TI公司专门为数字运动和电机控制推出的TMS320F243定点DSP芯片为例,在对DSP性能和结构特点分析的基础上,给出了以DSP为核心组成的高速永磁同步电机数字交流伺服系统功率主回路、控制驱动电路、位置与速度检测电路和电流检测电路的设计和实现方法.结果表明该设计方案容易实现,具有很强的通用性.     

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.     

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     

An affordable accurate evaluation of the binding conformations predicted by molecular docking studies in bio-system

Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of     

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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