The technique of derivative constant energy synchronous fluorimetry was intro-duced in this article. For mixture of fluorene, acenaphthene, anthracene and perylene, thedetection limit is 2. 4, 17.1, 0.27, 0.043 ng/mL,...The technique of derivative constant energy synchronous fluorimetry was intro-duced in this article. For mixture of fluorene, acenaphthene, anthracene and perylene, thedetection limit is 2. 4, 17.1, 0.27, 0.043 ng/mL, respectively, when first-derivative con-stant energy synchronous fluorimetry is employed. The detectlon limit is 1. 5, 15. 0, 0.13,0. 022 ng/mL, respectively, when second-derivative constant energy synchronous fluorlme-try is employed. In the method, four compounds can be simultaneously determined withoutany mutual interference.展开更多
A derivative patch interpolating recovery technique is analyzed for the finite element interpolation operator of projection type and the two-point boundary value problems. It is shown that the convergence rate of the ...A derivative patch interpolating recovery technique is analyzed for the finite element interpolation operator of projection type and the two-point boundary value problems. It is shown that the convergence rate of the recovered derivative admits superconvergence on the recovered subdomain, and is two order higher than the optimal global convergence rate at each internal nodal point when even order finite element spaces and local uniform meshes are used.展开更多
文摘The technique of derivative constant energy synchronous fluorimetry was intro-duced in this article. For mixture of fluorene, acenaphthene, anthracene and perylene, thedetection limit is 2. 4, 17.1, 0.27, 0.043 ng/mL, respectively, when first-derivative con-stant energy synchronous fluorimetry is employed. The detectlon limit is 1. 5, 15. 0, 0.13,0. 022 ng/mL, respectively, when second-derivative constant energy synchronous fluorlme-try is employed. In the method, four compounds can be simultaneously determined withoutany mutual interference.
文摘A derivative patch interpolating recovery technique is analyzed for the finite element interpolation operator of projection type and the two-point boundary value problems. It is shown that the convergence rate of the recovered derivative admits superconvergence on the recovered subdomain, and is two order higher than the optimal global convergence rate at each internal nodal point when even order finite element spaces and local uniform meshes are used.