On December 18,the Hainan Free Trade Port(FTP),the world’s largest by area,officially launched its special customs operations.Under these operations,the Hainan FTP will implement a special supervision model:freer acc...On December 18,the Hainan Free Trade Port(FTP),the world’s largest by area,officially launched its special customs operations.Under these operations,the Hainan FTP will implement a special supervision model:freer access at the first line,regulated access at the second line and free flows within the island.The“first line”refers to Hainan’s connection with overseas markets.展开更多
We initiate an approach to simultaneously treat numerators and denominators of Green’s functions arising from quasi-periodic Schrödinger operators,which in particular allows us to study completely resonant phase...We initiate an approach to simultaneously treat numerators and denominators of Green’s functions arising from quasi-periodic Schrödinger operators,which in particular allows us to study completely resonant phases of the almost Mathieu operator.Let(H_(λ,α,θ)u)(n)=u(n+1)+u(n−1)+2λcos 2π(θ+nα)u(n)be the almost Mathieu operator on l^(2)(Z),where λ,α,θ∈R.Let β(α)=lim sup k→∞−ln||kα||R/Z/|k|.We prove that for anyθwith 2θ∈αZ+Z,H_(λ,α,θ) satisfies Anderson localization if|λ|>e2β(α).This confirms a conjecture of Avila and Jitomirskaya(Ann Math(2)170(1):303–342,2009)and a particular case of the second spectral transition line conjecture of Jitomirskaya(XIth International Congress of Mathematical Physics(Paris,1994),Int.Press,Cambridge,pp.373–382,1995).展开更多
Background:China has successfully reduced tuberculosis(TB)incidence rate over the past three decades,however,challenges remain in improving the quality ofTB diagnosis and treatment.I n this paper,we assess the effects...Background:China has successfully reduced tuberculosis(TB)incidence rate over the past three decades,however,challenges remain in improving the quality ofTB diagnosis and treatment.I n this paper,we assess the effects of the implementation of"China National Health Commission(NHC)and Gates Foundation TB Preventi on and Control Pro-jectwon the quality ofTB care in the three provinces.展开更多
文摘On December 18,the Hainan Free Trade Port(FTP),the world’s largest by area,officially launched its special customs operations.Under these operations,the Hainan FTP will implement a special supervision model:freer access at the first line,regulated access at the second line and free flows within the island.The“first line”refers to Hainan’s connection with overseas markets.
基金supported in part by NSF DMS-2000345,DMS-2052572 and DMS-2246031.
文摘We initiate an approach to simultaneously treat numerators and denominators of Green’s functions arising from quasi-periodic Schrödinger operators,which in particular allows us to study completely resonant phases of the almost Mathieu operator.Let(H_(λ,α,θ)u)(n)=u(n+1)+u(n−1)+2λcos 2π(θ+nα)u(n)be the almost Mathieu operator on l^(2)(Z),where λ,α,θ∈R.Let β(α)=lim sup k→∞−ln||kα||R/Z/|k|.We prove that for anyθwith 2θ∈αZ+Z,H_(λ,α,θ) satisfies Anderson localization if|λ|>e2β(α).This confirms a conjecture of Avila and Jitomirskaya(Ann Math(2)170(1):303–342,2009)and a particular case of the second spectral transition line conjecture of Jitomirskaya(XIth International Congress of Mathematical Physics(Paris,1994),Int.Press,Cambridge,pp.373–382,1995).
文摘Background:China has successfully reduced tuberculosis(TB)incidence rate over the past three decades,however,challenges remain in improving the quality ofTB diagnosis and treatment.I n this paper,we assess the effects of the implementation of"China National Health Commission(NHC)and Gates Foundation TB Preventi on and Control Pro-jectwon the quality ofTB care in the three provinces.
