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RISS 인기검색어
- 검색키워드
- 저자 : Yuanqing He (검색결과 4 건)
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Asymptotic Stability of Master-slave Systems Using Sampled-data Controller with Time-delay
Shenghuang He,Yuanqing Wu,Yanzhou Li 제어·로봇·시스템학회 2019 International Journal of Control, Automation, and Vol.17 No.6
In this paper, the synchronization of Chaotic Lur’e systems subject to aperiodic sampling is investigated. It is shown that sampling interval is bounded and nonuniform. A modified free-matrix-based (MFMB) time-dependent Lyapunov functional is developed to capture the information on sampling pattern, which is sufficiently used to analyzestability of ChaoticLur’e systems. For a special case that the sampled-data controller suffers constant input delay, a discontinuous Lyapunov functional is presented based on the vector extension of Wirtinger’s inequality. The obtained stability condition leads to a less computational complexity than some of existing works. A longer value on the calculation of sampling interval is achieved. Two illustrative examples demonstrate the effectiveness of designed methods and less conservatism of the obtained results.
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Dynamic analysis and model test on steel-concrete composite beams under moving loads
Zhongming Hou,He Xia,Yuanqing Wang,YanLing Zhang,Tianshen Zhang 국제구조공학회 2015 Steel and Composite Structures, An International J Vol.18 No.3
This paper is concerned with the dynamic analysis of simply-supported steel-concrete composite beams under moving loads. Considering the interface slip between steel girder and concrete slab, the governing motion equations are derived from the direct balanced method. By variable separation approach, the analytical solution of natural frequencies and mode shapes are obtained, as well as the orthogonal conditions. Then the dynamic responses of the composite beam under moving loads are analyzed, and compared with the experimental results. The analysis results show that the governing motion equations become more complicated when interface slip is taken into account, and the dynamic behaviors are significantly influenced by the shear connection stiffness. In the dynamic calculation of composite beams, the global stiffness should not be reduced as the same factor to all orders, but as different ones according to the dynamic stiffness reduction factor (DSRF), to which should be paid more attention in calculation, design and experiment, or else great deviation is inevitable.
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Cao, Jian,He, Yuanqing,Li, Guohui,Chen, Keping,Kong, Jie,Wang, Fenghua,Shi, Jing,Yao, Qin Korean Society of Sericultural Science 2011 International Journal of Industrial Entomology Vol.22 No.2
Protein kinase C (PKC) is involved in many cellular signaling pathways, it participates in many physiological processes, such as cell cycle, growth, proliferation, differentiation and apoptosis. To investigate the effect of PKC on the silkworm midgut tissue infection of Bombyx mori parvo-like virus (BmPLV), a B. mori atypical protein kinase C (BmaPKC) gene was cloned from larval midgut tissue, expressed in E. coli and purified. Additionally, the BmPLV susceptible silkworm strain and resistant silkworm strain were used to test the effect of the B. mori infection on BmPLV. The result showed that BmaPKC encodes a predicted 586 amino acid protein, which contains a C-terminal kinase domain and an N-terminal regulatory domain. The maximum expression amount of the soluble (His)6-tagged fusion protein was detected after 0.8 mmol/L IPTG was added and cultured at $21^{\circ}C$. The (His) 6-tagged fusion protein revealed about 73 kDa molecular weight which confirmed by western blot and mass spectrography. Furthermore BmaPKC protein were detected at 0-72 h post-infection in BmPLVinfected larval midgut tissue, western blot showed that as time went on, the expression of BmaPKC increased gradually in susceptible strain, the expression quantity on 72 h is 5 times of 0 h. However, in resistant strain, the expression quantity is slightly lower than susceptible strain. But no significant change in resistant strain was observed as time went on. The available data suggest that BmaPKC may involve in the regulation of BmPLV proliferation.
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Tingsheng Qiu,Yuanqing He,Xianhui Qiu,Xiuli Yang 한국공업화학회 2017 Journal of Industrial and Engineering Chemistry Vol.45 No.-
Density functional theory calculations,flotation behavior, X-ray photoelectron spectroscopy, and infraredspectra were combined to reveal the Cu2+ activation mechanism on a cyanide (CN )-leached sphaleritesurface. Low CN adsorption enhanced the activation capability of Cu2+ on the sphalerite surface,whereas the hydrophilicity of the sphalerite increased with increasing CN coverage, which hindered Cu2+ adsorption. As the amount of chemically adsorbed Cu2+ on the sphalerite surface increased, Cu2+ beganto desorb CN , leading to the same result, which is consistent with the low CN coverage.
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