% besselfilter. Function to implement a bandpass Bessel Filter. % Inputs: % order: Number of poles in the filter. Scalar numeric value. % low: Lower frequency bound (Hz). Scalar numeric value. % high: Uppe

在分光光度法分析高浓度锌溶液中痕量钴离子浓度的过程中，由于基底离子Zn(II)与待测离子Co(II)化学性质相近，且基底离子浓度过高，导致Co(II)的光谱信号与Zn(II)的光谱信号重叠，溶液的吸光度与浓度在部分波长段呈现很强的非线性和不佳的加和性，因此无法通过全波段信息实现痕量Co(II)浓度的检测。本文提出了间隔-相关系数法对溶液的紫外可见光光谱进行波长点的筛选(In the process of spectrophotometric analysis of trace cobalt io

计算二维传热问题的有限元程序包，非常难得，对传热感兴趣的人会有帮助。(Finite element matlab code for 2D heat transfer calculation. It deserve to obtain. It will be helpful for the man interested in heat transfer.)

将VASP生成的CHGCAR格式文件合并后转变成Tecplot格式文件(Convert the combined chgcar format file generated by VASP to Tecplot format file)