Efforts to use the tech to customize lessons to students' individual interest demonstrate its potential—and the shortcomings.

Abstract: The sparsity-regularized linear inverse problem has been widely used in many fields, such as remote sensing imaging, image processing and analysis, seismic deconvolution, compressed sensing, ...

for(int l=min(a.size(),b.size());l;l--) if(a.substr(a.size()-l)==b.substr(0,l)) ...