Xin-yun Zhu

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For non-Hermitian saddle point problems with the non-Hermitian positive definite (1,1)block, Zhang et al. (2014) presented a relaxed positive-definite and skew-Hermitian splitting (RPSS) preconditioner to accelerate the convergence rates of the Krylov subspace iteration methods such as GMRES. In this paper, the convergence property of the GRPSS iteration(More)
For non-Hermitian saddle point linear systems, Pan, Ng and Bai presented a positive semi-definite and skew-Hermitian splitting (PSS) preconditioner (Pan et al. Appl. Math. Comput. 172, 762–771 2006), to accelerate the convergence rate of the Krylov subspace iteration methods like the GMRES method. In this paper, a relaxed positive semi-definite and(More)
OBJECTIVE To master the changes of schistosomiasis epidemic situation in national surveillance sites of Zhenjiang City, Jiangsu Province. METHODS According to the scheme of the national schistosomiasis surveillance, the Shicheng Village of Yangzhong County and Sanzhou Village of Dantu District were selected as the national schistosomiasis surveillance(More)
OBJECTIVE To explore the method of adjusting the immunosuppressants in serious infection after liver transplantation. METHODS With reference to sepsis-related organ failure assessment (SOFA), 2005.1-2007.12, when the patient's score > or =15, the immunosuppressants were withdrawn, and the patients were given powerful antibiotics and the other treatments(More)
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