labview实现pdf调用编辑和修改等多个功能，是llb文件，包含多个函数，可自由调用-labview pdf call edit and modify several functions, llb file that contains multiple functions, are free to call

歪度指标是描述信号概率密度函数的重要参数。在对非平稳信号进行时域分析时，利用歪度指标反映了振动信号的非对称性，用来判断轴承是否发生碰磨。本文件中将歪度指标独立制作了子VI，便于labview程序调用。(The skewness index is an important parameter to describe the probability density function of a signal. When the non-stationary signals are analyzed i

调用candll文件来控制CAN盒关闭。。其他函数还在学习中...(Call the candll file to control the CAN box shutdown.. Other functions are still learning...)