基于MATLAB GUI的波动光学仿真平台

利用MATLAB GUI构建了一个波动光学仿真平台,实现了不同条件下波动光学实验的仿真,并设计了人机友好的图形用户界面,最后由mcc编译生成可脱离MATLAB环境运行的可执行文件。该平台具有可移植性、可拓展性强、且具有交互性的优点,能实现传真基本波动光学实验现象的条纹及光强分布等功能,并且能灵活设置实验参数以及实验结果的对比分析。     

The Dynamical System Approach to Multivariate Data Analysis

In this survey a number of problems arising in multivariate data analysis (MDA) are listed and reformulated as matrix fitting (e.g., least-squares, maximum likelihood, etc.) constrained optimization problems (OPs). The goal is to demonstrate that consideration and solution of these diverse MDA problems can be unified by means of the dynamical system approach. The approach transforms the MDA problems into dynamical systems on a manifold defined by the constraints of the original OP.     

MATLAB平台下声卡任意波形发生器的设计

介绍了一种基于MATLAB GUI的虚拟仪器设计方法.系统以手绘波形为信号数据源.通过调用MATLABDAQ工具控制声卡D/A转换器,实现了声卡在音频范围内任意波形信号的输出.     

基于MATLAB与LabVIEW的 Mie散射参数分析系统

针对激光散射法测量0.1 m~10 m微小球形颗粒过程中,Mie散射理论各参数的分析、计算、最优化选取比较复杂和繁琐,通过收敛速度、折射率和尺度参数测量范围、叠加次数的比较,采用球形粒子Mie散射参量的MATLAB改进算法, 结合MATLAB较强的计算能力和LabVIEW良好的图形化界面,进行LabVIEW和MATLAB混合编程。设计了Mie散射理论参数分析系统,系统实现散射系数的计算,并分别对散射系数与颗粒直径关系曲线、散射强度分布曲线、入射光波长与散射光强关系曲线、颗粒直径与散射光强关系曲线、入射光偏振角与散射光强关系曲线进行分析。通过实验结果和结论对比验证系统可行,且散射系数、消光系数和散射光强的计算结果可精确到小数点后17位,从而达到减少大量计算和编程工作的目的。     

MATLAB中大型线性方程组的非定常迭代法

科学研究和大型工程设计中很多问题以非线性数学模型来描述,而这些数学模型求解常常归结为各种大型线性方程组的求解,因而能否有效地求解大型线性方程组,特别是病态的方程组,是非常关键的.本文介绍了MATLAB中求解大型线性方程组常用的非定常迭代法,并以GMRES算法为例介绍了算法的数学描述.     

The DOSY Toolbox: A new tool for processing PFG NMR diffusion data

The DOSY Toolbox is a free programme for processing PFG NMR diffusion data (sometimes loosely referred to as DOSY data), distributed under the GNU General Public License. NMR data from three major manufacturers can be imported and all processing is done in a user-friendly graphical user interface. The Toolbox is completely free-standing in the sense that all necessary basic processing of NMR data (e.g., Fourier transformation and phasing) is catered for within the programme, as well as a number of methods specific to DOSY data (e.g., DOSY and SCORE). The programme is written in MATLAB^® and as such can be run on any platform, but can also run independent of MATLAB^® in a free-standing compiled version for Windows, Mac, and Linux.     

Mathematical analysis of memristor through fractal-fractional differential operators: A numerical study

The newly generalized energy storage component, namely, memristor, which is a fundamental circuit element so called universal charge-controlled mem-element, is proposed for controlling the analysis and coexisting attractors. The governing differential equations of memristor are highly nonlinear for mathematical relationships. The mathematical model of memristor is established in terms of newly defined fractal-fractional differential operators so called Atangana-Baleanu, Caputo-Fabrizio, and Caputo fractal-fractional differential operator. A novel numerical approach is developed for the governing differential equations of memristor on the basis of Atangana-Baleanu, Caputo-Fabrizio, and Caputo fractal-fractional differential operator. We discussed chaotic behavior of memristor under three criteria such as (i) varying fractal order, we fixed fractional order; (ii) varying fractional order, we fixed fractal order; and (ii) varying fractal and fractional orders simultaneously. Our investigated graphical illustrations and simulated results via MATLAB for the chaotic behaviors of memristor suggest that newly presented Atangana-Baleanu, Caputo-Fabrizio, and Caputo fractal-fractional differential operators generate significant results as compared with classical approach.     

平面螺线外的磁场研究

利用MATLAB数值求解了密绕平面螺线外的磁场分布,所得结论对于工程上径向导引磁场的设计具有重要的参考价值．     

尾流光学信号的处理方法

主要利用滤波器、离散傅里叶变换、以及统计信号处理方法等对实验室模拟的尾流信号进行分析和处理、计算.从能量的角度来看,光学信号在有无气泡幕情况下的区别是非常明显的;利用滤波器只能作为尾流光学信号的预处理,从实际应用来看,需要做进一步处理;离散傅里叶变换对不同气压下得到的处理结果存在的区别,必然也为判断不同航速、不同尾龄下的尾流提供了一种线索;以Chirp z变换的形式对尾流光学信号进行处理,使得这种分布具有相当直观的图形,结合适当的图形处理方式,将有可能确定探测尾流光学性质的特征信号.     

计算机辅助质谱解析初级专家系统的设计

文中介绍了质谱解析的基本方法,讨论了利用开放式可扩充体系结构MATLAB语言开发综合性计算机辅助质谱解析初级专家系统的构想和设计思想。