A procedure for the preparation of continuous rod consisting of poly(glycidyl methacrylate\|co\|ethylene dimethacrylate) for immobilized metal affinity chromatography (IMAC) is presented. When chelating Cu(Ⅱ), Zn(Ⅱ)...A procedure for the preparation of continuous rod consisting of poly(glycidyl methacrylate\|co\|ethylene dimethacrylate) for immobilized metal affinity chromatography (IMAC) is presented. When chelating Cu(Ⅱ), Zn(Ⅱ) or Ni(Ⅱ) on it, the rod displayed a property of IMAC and the selectivity for protein separation was different from that obtained from the naked rod. An abnormal increase in retention times of proteins was found under the condition of either very high pH or very low pH on the metal chelated rods.展开更多
A robust H∞ directional controller for a sampled-data autonomous airship with polytopic parameter uncertainties was proposed. By input delay approach, the linearized airship model was transformed into a continuous-ti...A robust H∞ directional controller for a sampled-data autonomous airship with polytopic parameter uncertainties was proposed. By input delay approach, the linearized airship model was transformed into a continuous-time system with time-varying delay. Sufficient conditions were then established based on the constructed Lyapunov-Krasovskii functional, which guarantee that the system is mean-square exponentially stable with H∞ performance. The desired controller can be obtained by solving the obtained conditions. Simulation results show that guaranteed minimum H∞ performance γ=1.4037 and fast response of attitude for sampled-data autonomous airship are achieved in spite of the existence of parameter uncertainties.展开更多
文摘A procedure for the preparation of continuous rod consisting of poly(glycidyl methacrylate\|co\|ethylene dimethacrylate) for immobilized metal affinity chromatography (IMAC) is presented. When chelating Cu(Ⅱ), Zn(Ⅱ) or Ni(Ⅱ) on it, the rod displayed a property of IMAC and the selectivity for protein separation was different from that obtained from the naked rod. An abnormal increase in retention times of proteins was found under the condition of either very high pH or very low pH on the metal chelated rods.
基金Projects(51205253,11272205)supported by the National Natural Science Foundation of ChinaProject(2012AA7052005)supported by the National High Technology Research and Development Program of China
文摘A robust H∞ directional controller for a sampled-data autonomous airship with polytopic parameter uncertainties was proposed. By input delay approach, the linearized airship model was transformed into a continuous-time system with time-varying delay. Sufficient conditions were then established based on the constructed Lyapunov-Krasovskii functional, which guarantee that the system is mean-square exponentially stable with H∞ performance. The desired controller can be obtained by solving the obtained conditions. Simulation results show that guaranteed minimum H∞ performance γ=1.4037 and fast response of attitude for sampled-data autonomous airship are achieved in spite of the existence of parameter uncertainties.
