This paper is concerned with the problem of a non-fragile H2 controller design for linear discrete-time systems in the presence of controller gain variations. The controller gain to be designed is assumed to have mult...
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This paper is concerned with the problem of a non- fragile H 2 controller design for linear discrete-time systems in the presence of controller gain variations. The controller gain to be designed is assumed to have m...
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This paper is concerned with the problem of a non- fragile H 2 controller design for linear discrete-time systems in the presence of controller gain variations. The controller gain to be designed is assumed to have multiplicative gain variations. The purpose of this work is to design a dynamic output feedback controller such that, for all admissible multiplicative controller gain variations, the closed-loop systems are asymptotically stable and have an H 2 performance criterion via matrix inequalities. The sequentially linear programming method (SLPMM) is applied to solve the matrix inequalities. Numerical example is given to illustrate the design procedure and its effectiveness.
Light-induced autofluorescence spectra of nasopharyngeal carcinoma and normal tissue in vitro were compared to that of known endogenous fluorophores to explore the possible causes of tissue autofluorescence and to fur...
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ISBN:
(纸本)081946080X
Light-induced autofluorescence spectra of nasopharyngeal carcinoma and normal tissue in vitro were compared to that of known endogenous fluorophores to explore the possible causes of tissue autofluorescence and to further determine the optimal excitation wavelengths for optical biopsy in vivo. Nasopharyngeal carcinoma and normal tissues were obtained from the suspected patients during pathological biopsy. A FL/FS920 combined TCSPC spectrofluorimeter and a lifetime spectrometer system was used for autofluorescence spectra measurement. Fluorescence excitation wavelengths varying from 260 to 480 nm were used to induce tissue autofluorescence, and the corresponding fluorescence emission spectra were recorded from a range starting 20 nm above the excitation wavelength and extending to 700 run. The autofluorescence excitation-emission pairs of nasopharyngeal carcinoma and normal tissues occur at 300-330, 340-460 and 450-520 nm, and the optimal diagnostic excitation wavelengths for detection of nasopharyngeal carcinoma were 340 and 450 run. The results abtained in this study could be treated as a reference for the development of optical biopsy system for nasopharyngeal carcinoma.
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