In this paper,we develop an active set identification technique.By means of the active set technique,we present an active set adaptive monotone projected Barzilai-Borwein method(ASAMPBB)for solving nonnegative matrix ...In this paper,we develop an active set identification technique.By means of the active set technique,we present an active set adaptive monotone projected Barzilai-Borwein method(ASAMPBB)for solving nonnegative matrix factorization(NMF)based on the alternating nonnegative least squares framework,in which the Barzilai-Borwein(BB)step sizes can be adaptively picked to get meaningful convergence rate improvements.To get optimal step size,we take into account of the curvature information.In addition,the larger step size technique is exploited to accelerate convergence of the proposed method.The global convergence of the proposed method is analysed under mild assumption.Finally,the results of the numerical experiments on both synthetic and real-world datasets show that the proposed method is effective.展开更多
The room temperature phosphorescences（RTP）are of growing interest owing to their promising applications in material science and bioimaging.To date,the lumiogens showing persistent RTP effect mainly contain the noble...The room temperature phosphorescences（RTP）are of growing interest owing to their promising applications in material science and bioimaging.To date,the lumiogens showing persistent RTP effect mainly contain the noble metals which have the shortcomings such as high cost,potential toxicity.The exploration of metal free luminogens,i.e.,purely organic RTP luminogens,is thus of great importance for the community.展开更多
The present paper investigates the problem of incentive compatibility of voting mechanism and shows that the mechanism of approval voting is incentive-compatible,i.e. its mechanism gives voters incentive for voting si...The present paper investigates the problem of incentive compatibility of voting mechanism and shows that the mechanism of approval voting is incentive-compatible,i.e. its mechanism gives voters incentive for voting sincerely.展开更多
The most important agenda of this year’s session of the National People Congress (NPC), China’s top legislature, held March 5-14, was deliberation and approval of the draft blueprint of China’s economic and social ...The most important agenda of this year’s session of the National People Congress (NPC), China’s top legislature, held March 5-14, was deliberation and approval of the draft blueprint of China’s economic and social development for the next five years, the 12th Five-Year Plan (2011-15). When delivering the government work report at the Fourth Session of the 11th NPC on March 5, Premier Wen Jiabao also summarized the main targets and tasks for the 12th Five-Year Plan period. Excerpts follow:展开更多
基金the support from the National Natural Science Foundation of China(Nos.12171384,12201492,61976176)the National Science Foundation of Shaanxi(No.2021JM-323).
文摘In this paper,we develop an active set identification technique.By means of the active set technique,we present an active set adaptive monotone projected Barzilai-Borwein method(ASAMPBB)for solving nonnegative matrix factorization(NMF)based on the alternating nonnegative least squares framework,in which the Barzilai-Borwein(BB)step sizes can be adaptively picked to get meaningful convergence rate improvements.To get optimal step size,we take into account of the curvature information.In addition,the larger step size technique is exploited to accelerate convergence of the proposed method.The global convergence of the proposed method is analysed under mild assumption.Finally,the results of the numerical experiments on both synthetic and real-world datasets show that the proposed method is effective.
文摘The room temperature phosphorescences（RTP）are of growing interest owing to their promising applications in material science and bioimaging.To date,the lumiogens showing persistent RTP effect mainly contain the noble metals which have the shortcomings such as high cost,potential toxicity.The exploration of metal free luminogens,i.e.,purely organic RTP luminogens,is thus of great importance for the community.
文摘The present paper investigates the problem of incentive compatibility of voting mechanism and shows that the mechanism of approval voting is incentive-compatible,i.e. its mechanism gives voters incentive for voting sincerely.
文摘The most important agenda of this year’s session of the National People Congress (NPC), China’s top legislature, held March 5-14, was deliberation and approval of the draft blueprint of China’s economic and social development for the next five years, the 12th Five-Year Plan (2011-15). When delivering the government work report at the Fourth Session of the 11th NPC on March 5, Premier Wen Jiabao also summarized the main targets and tasks for the 12th Five-Year Plan period. Excerpts follow:
