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Jian-qin Wang,Zao-jian Zou,Tao Wang 대한조선학회 2019 International Journal of Naval Architecture and Oc Vol.11 No.1
The path following problem of a ship sailing in restricted waters under wind effect is investigated based on Robust H∞ Guaranteed Cost Control (RHGCC). To design the controller, the ship maneuvering motion is modeled as a linear uncertain system with norm-bounded time-varying parametric uncertainty. To counteract the bank and wind effects, the integral of path error is augmented to the original system. Based on the extended linear uncertain system, sufficient conditions for existence of the RHGCC are given. To obtain an optimal robust H∞ guaranteed cost control law, a convex optimization problem with Linear Matrix Inequality (LMI) constraints is formulated, which minimizes the guaranteed cost of the close-loop system and mitigates the effect of external disturbance on the performance output. Numerical simulations have confirmed the effectiveness and robustness of the proposed control strategy for the path following goal of a ship sailing in restricted waters under wind effect.
Wang, Jian-qin,Zou, Zao-jian,Wang, Tao The Society of Naval Architects of Korea 2019 International Journal of Naval Architecture and Oc Vol.11 No.1
The path following problem of a ship sailing in restricted waters under wind effect is investigated based on Robust $H_{\infty}$ Guaranteed Cost Control (RHGCC). To design the controller, the ship maneuvering motion is modeled as a linear uncertain system with norm-bounded time-varying parametric uncertainty. To counteract the bank and wind effects, the integral of path error is augmented to the original system. Based on the extended linear uncertain system, sufficient conditions for existence of the RHGCC are given. To obtain an optimal robust $H_{\infty}$ guaranteed cost control law, a convex optimization problem with Linear Matrix Inequality (LMI) constraints is formulated, which minimizes the guaranteed cost of the close-loop system and mitigates the effect of external disturbance on the performance output. Numerical simulations have confirmed the effectiveness and robustness of the proposed control strategy for the path following goal of a ship sailing in restricted waters under wind effect.
KBTBD7, a novel human BTB-kelch protein, activates transcriptional activities of SRE and AP-1
( Jun Jian Hu ),( Wu Zhou Yuan ),( Ming Tang ),( Yue Qun Wang ),( Xiong Wei Fan ),( Xiao Yang Mo ),( Yong Qing Li ),( Zao Chu Ying ),( Yong Qi Wan ),( Karen Ocorr ),( Rolf Bodmer ),( Yun Deng ),( Xiu 생화학분자생물학회 2010 BMB Reports Vol.43 No.1
Ke Zhou,Jian Yang,Zao-Xia Wang,Ji-Rui Wang 한국유전학회 2017 Genes & Genomics Vol.39 No.2
Pre-harvest sprouting (PHS) is the germination of grains in the spike under wet conditions before harvest, which causes a severe reduction in crop yield and flour quality. The phytohormone abscisic acid plays a key role in regulating seed dormancy, which inhibits pre-harvest spouting or vivipary for many important crops. TaABI5, belonging to a family of basic leucine zipper transcription factors could regulate a subset of late embryogenesis abundant genes during seed development, was isolated and characterized. Phylogenetic analysis revealed that TaABI5 homologous gene belonged to the ABI5 subgroup of the ABF/AREB/ABI5 subfamily. TaABI5 consist of four conserved domains and one bZip domain. The expression pattern of TaABI5 indicated that it was seed-specific and accumulated at late stages of seed development. Accumulation of TaABI5 in synthetic hexaploid wheat SHW-L1 (PHS resistance) was 8.93-fold higher than that in wheat cultivar Chuanmai 32 (PHS susceptible) at 25 days post anthesis. Four expression quantitative trait loci (eQTL) of TaABI5 on chromosome 2DS, 4DS, 6DS, and 7DL were characterized from SHW-L1/Chuanmai 32 derived recombinant inbred line population.
Wei-Wei Ding,Zao-jian Zou,Jing-Ping Wu,Bai-Gang Huang 대한조선학회 2019 International Journal of Naval Architecture and Oc Vol.11 No.2
Bragg reflection of water waves by three kinds of surface-piercing fixed structures with rectangular, cosinoidal and triangular shapes is studied. Boundary element method is used to analyze the wave scattering by these structures based on the linear wave theory. Results of reflection and transmission coefficients are validated by comparing with those available in literature. These structures with proper configurations are proved to be effective in attenuating waves by using Bragg reflection, and the triangular structures are found to be the best choices among the structures with same width and same area. Systematic calculations are then carried out for the triangular structures by varying the number, the draft, the width, the gap and the combination of width and gap of the structures to analyze their influences on the characteristics of Bragg reflection. The results are of reference values for design of the structures to attenuate waves based on the Bragg reflection.
Ding, Wei-Wei,Zou, Zao-Jian,Wu, Jing-Ping,Huang, Bai-Gang The Society of Naval Architects of Korea 2019 International Journal of Naval Architecture and Oc Vol.11 No.2
Bragg reflection of water waves by three kinds of surface-piercing fixed structures with rectangular, cosinoidal and triangular shapes is studied. Boundary element method is used to analyze the wave scattering by these structures based on the linear wave theory. Results of reflection and transmission coefficients are validated by comparing with those available in literature. These structures with proper configurations are proved to be effective in attenuating waves by using Bragg reflection, and the triangular structures are found to be the best choices among the structures with same width and same area. Systematic calculations are then carried out for the triangular structures by varying the number, the draft, the width, the gap and the combination of width and gap of the structures to analyze their influences on the characteristics of Bragg reflection. The results are of reference values for design of the structures to attenuate waves based on the Bragg reflection.