Bertrand's Problem in Making a Face Mask-MedSci.cn

Bertrand's Problem in Making a Face Mask

Qin, XN; Chen, MY

Qin, XN (通讯作者)，Zhejiang Sci Tech Univ, Natl Engn Lab Text Fiber Mat & Proc Technol, Hangzhou 310018, Peoples R China.;Qin, XN (通讯作者)，Zhejiang Sci Tech Univ, Key Lab Intelligent Text & Flexible Interconnect, Hangzhou 310018, Peoples R China.