ArchiveVolume 8, Issue 2, April 2020
Li Yang, Kong Linghong
Pages: 32-37     Published Online: Nov. 12, 2019
DOI: 10.11648/j.si.20200802.13        Views 377      Downloads 16
Shenxin Ye, Yaxuan Chen
Pages: 38-42     Published Online: May 19, 2020
DOI: 10.11648/j.si.20200802.14        Views 113      Downloads 24
Zhu Xiaoning, Tang Yuwei
Pages: 43-47     Published Online: May 19, 2020
DOI: 10.11648/j.si.20200802.15        Views 123      Downloads 31
Yu Rui, Yin Kuiying
Pages: 48-53     Published Online: May 19, 2020
DOI: 10.11648/j.si.20200802.16        Views 118      Downloads 38
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