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State Estimation for Discrete-Time Markov Jump Linear Systems Based on Orthogonal Projective Theorem
Wei Liu,Huaguang Zhang,Zhanshan Wang,Qiuye Sun 제어·로봇·시스템학회 2012 International Journal of Control, Automation, and Vol.10 No.5
In this paper, state estimation problem for discrete-time Markov jump linear systems is considered. Based on orthogonal projective theorem, a novel suboptimal algorithm for state estimate of discrete-time Markov jump linear systems in the sense of minimum mean square error estimate is proposed. The proposed suboptimal algorithm is recursive and finite-dimensionally computable. Computer simulations are carried out to evaluate the performance of the proposed suboptimal algorithm.
Study for Improvement of Laser Induced Damage of 1064 nm AR Coatings in Nanosecond Pulse
Hongfei Jiao,Xinbing Cheng,Jiangtao Lu,Ganghua Bao,Jinlong Zhang,Bin Ma,Huasong Liu,Zhanshan Wang 한국광학회 2013 Current Optics and Photonics Vol.17 No.1
For the conventionally polished fused silica substrate, an around 100 nm depth redeposition polishing layer was formed on the top of surface. Polishing compounds, densely embedded in the redeposition polishing layer were the dominant factor that limited the laser induced damage threshold (LIDT) of transmission elements in nanosecond laser systems. Chemical etching, super-precise polishing and ion beam etching were employed in different ways to eliminate these absorbers from the substrate. After that,Antireflection (AR) coatings were deposited on these substrates in the same batch and then tested by 1064nm nano-pulse laser. It was found that among these techniques only the ion beam etching method, which can effectively remove the polishing compound and did not induce extra absorbers during the disposal process, can successfully improve the LIDT of AR coatings.