School of Mechanical;
Electrical&Information Engineering;
Shandong University;
Weihai 264209;
People's Republic of China;
Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment;
Institute of Space Sciences;
Shandong University;
Weihai 264209;
People's Republic of China;
laser-induced breakdown spectroscopy; convolutional neural network; activation function; optimization method; quantitative analysis;