In this paper, we propose and analyze Adaptive Projected Gradient Thresholding (APGT) methods for finding sparse solutions of the underdetermined linear system with equality and box constrains. The general convergence will be demonstrated, and in addition the bound of the number of iterations is...

After China's accession to WTO in 2001, it has substantially reduced its own import tariffs, and since then the participation of China’s various industries in global value chains have all deepened steadily(GVC afterward). The traditional wisdom about import tariff is that proper levels of...