The problem of robust L 1 filtering with pole constraint in a disk for linear continuous polytopic uncertain systems is discussed. The attention is focused on design a linear asymptotically stable filter such that th...The problem of robust L 1 filtering with pole constraint in a disk for linear continuous polytopic uncertain systems is discussed. The attention is focused on design a linear asymptotically stable filter such that the filtering error system remains robustly stable, and has a L 1 performance constraint and pole constraint in a disk. The new robust L 1 performance criteria and regional pole placement condition are obtained via parameter-dependent Lyapunov functions method. Upon the proposed multiobjective performance criteria and by means of LMI technique, both full-order and reduced-order robust L 1 filter with suitable dynamic behavior can be obtained from the solution of convex optimization problems. Compared with earlier result in the quadratic framework, this approach turns out to be less conservative. The efficiency of the proposed technique is demonstrated by a numerical example.展开更多
Carbon nanotubes (CNT) were modified bynitric acid oxidation. Infrared spectroscopy (IR) demon-strated that hydroxyl (—OH) and carbonyl (—C== O) func-tional groups were introduced to the surface of modifiedCNT. Micr...Carbon nanotubes (CNT) were modified bynitric acid oxidation. Infrared spectroscopy (IR) demon-strated that hydroxyl (—OH) and carbonyl (—C== O) func-tional groups were introduced to the surface of modifiedCNT. Micrometrics ASAP 2000 measurement showed that the surface area of modified CNT was slightly increased.Furthermore, the Pb2+ adsorption behavior on the surface of modified CNT has been investigated. The results indicate that the modified CNT has an exceptional adsorption capa-bility for Pb2+ removal. The adsorption isotherms are well described by the Langmuir equation under test temperatures and the kinetics level is three.展开更多
文摘The problem of robust L 1 filtering with pole constraint in a disk for linear continuous polytopic uncertain systems is discussed. The attention is focused on design a linear asymptotically stable filter such that the filtering error system remains robustly stable, and has a L 1 performance constraint and pole constraint in a disk. The new robust L 1 performance criteria and regional pole placement condition are obtained via parameter-dependent Lyapunov functions method. Upon the proposed multiobjective performance criteria and by means of LMI technique, both full-order and reduced-order robust L 1 filter with suitable dynamic behavior can be obtained from the solution of convex optimization problems. Compared with earlier result in the quadratic framework, this approach turns out to be less conservative. The efficiency of the proposed technique is demonstrated by a numerical example.
基金the National Natural Science Foundation of China (Grant No.50178067)
文摘Carbon nanotubes (CNT) were modified bynitric acid oxidation. Infrared spectroscopy (IR) demon-strated that hydroxyl (—OH) and carbonyl (—C== O) func-tional groups were introduced to the surface of modifiedCNT. Micrometrics ASAP 2000 measurement showed that the surface area of modified CNT was slightly increased.Furthermore, the Pb2+ adsorption behavior on the surface of modified CNT has been investigated. The results indicate that the modified CNT has an exceptional adsorption capa-bility for Pb2+ removal. The adsorption isotherms are well described by the Langmuir equation under test temperatures and the kinetics level is three.
