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Yichang, China

China Three Gorges University is located in Yichang City, Hubei province, China. The university is located at the mouth of the Xiling Gorge, one of the Three Gorges. The campus occupies 200 hectares, and the total building area comprises 830,000 m2 . The libraries consist of 2,000,000 volumes. Wikipedia.


Yu H.,China Three Gorges University | Yu H.,University of Pretoria | Xia X.,University of Pretoria
Automatica | Year: 2012

In this paper, the consensus problem of multi-agent following a leader is studied. An adaptive design method is presented for multi-agent systems with non-identical unknown nonlinear dynamics, and for a leader to be followed that is also nonlinear and unknown. By parameterizations of unknown nonlinear dynamics of all agents, a decentralized adaptive consensus algorithm is proposed in networks with jointly connected topologies by incorporating local consensus errors in addition to relative position feedback. Analysis of stability and parameter convergence of the proposed algorithm are conducted based on algebraic graph theory and Lyapunov theory. Finally, examples are provided to validate the theoretical results. © 2012 Elsevier Ltd. All rights reserved. Source


Huang W.,China Three Gorges University
Neoplasma | Year: 2012

Tupistra chinensis Baker has been used as a folk remedy in China, and it has been shown to exhibit anti-inflammation, expectorant and anti-bacterial effects. In this study, we report the cytotoxic activity of the total saponins of Tupistra chinensis Baker (TST) against several carcinoma cell lines, including A549, MCF-7 and HeLa cells with the IC50 values of 4.11 μg/ml, 6.47 μg/ml and 7.78 μg/ml respectively. Treatment of A549 cells with TST resulted in growth inhibition and induction of apoptosis in a time-dependent manners determined by cell viability, chromatin condensation, DNA fragmentation and flow cytometry analysis. The activities of caspase-3, 9 were significantly increased following TST treatment. Real-time PCR analysis showed that the mRNA expression levels of pro-apoptosis related genes including Bax, P21, P27 and P53 were markedly increased in the cells treated with TST but anti-apoptosis related gene Bcl-2 was slightly decreased. TST also leads to a loss of mitochondrial membrane potential in a time-dependent manner the release of cytochrome C from mitochondria into the cytosol. Thus, these results suggest that TST may play an important role in tumor growth suppression by inducing apoptosis in human A549 cells via mitochondria-dependent apoptotic pathways and the TST would be promising to treat human lung adenocarcinoma. Source


Xiao M.,China Three Gorges University
International Journal of Automation and Computing | Year: 2013

The mathematical model of a high-speed underwater vehicle getting catastrophe in the out-of-water course and a nonlinear sliding mode control with the adaptive backstepping approach for the catastrophic course are proposed. The speed change is large at the moment that the high-speed underwater vehicle launches out of the water to attack an air target. It causes motion parameter uncertainties and affects the precision attack ability. The trajectory angle dynamic characteristic is based on the description of the transformed state-coordinates, the nonlinear sliding mode control is designed to track a linear reference model. Furthermore, the adaptive backstepping control approach is utilized to improve the robustness against the unknown parameter uncertainties. With the proposed control of attitude tracking, the controlled navigational control system possesses the advantages of good transient performance and robustness to parametric uncertainties. These can be predicted and regulated through the design of a linear reference model that has the desired dynamic behavior for the trajectory of the high-speed underwater vehicle to attack its target. Finally, some digital simulation results show that the control system can be applied to a catastrophic course, and that it illustrates great robustness against system parameter uncertainties and external disturbances. © 2013 Institute of Automation, Chinese Academy of Sciences and Springer-Verlag Berlin Heidelberg. Source


Kusky T.M.,China Three Gorges University
Journal of Earth Science | Year: 2011

The geometry and timing of amalgamation of the North China craton (NCC) have been controversial, with three main models with significantly different interpretations of regional structure, geochronology, and geological relationships. The model of Zhao G C et al. suggests that the eastern and western blocks of the NCC formed separately in the Archean, and an active margin was developed on the eastern block between 2.5 and 1.85 Ga, when the two blocks collided above an east dipping subduction zone. The model of Kusky et al. presumes that the eastern block rifted from an unknown larger continent at circa 2.7 Ga, and experienced a collision with an arc (perhaps attached to the western block) above a west-dipping subduction zone at 2.5 Ga, and the 1.85 Ga metamorphism is related to a collision along the northern margin of the craton when the NCC joined the Columbia supercontinent. The model of Faure et al. suggests two collisions in the central orogenic belt, at 2.1 and 1.88 Ga. Recent seismic results support both the models of Kusky et al. and Faure et al., showing that subduction beneath the central orogenic belt (COB) was west-directed, and that there is a second, west-dipping paleosubduction zone located to the east of the COB dipping beneath the western block (Ordos craton). The boundaries identified through geophysics do not correlate with the boundaries of the Trans-North China orogen suggested in the Zhao et al. model, and the subduction polarity is opposite that predicted by that model. The seismic profiles are consistent with an Archean collision above a west-dipping subduction zone beneath the COB predicted by the models of Kusky et al., and the second west-dipping subduction zone is consistent with the two events suggested in the Faure et al. model. © 2011 China University of Geosciences and Springer-Verlag Berlin Heidelberg. Source


Kusky T.M.,China Three Gorges University
Gondwana Research | Year: 2011

The geometry and timing of amalgamation of the North China Craton have been controversial, with three main models offering significantly different interpretations of regional structure, geochronology, and geological relationships. One model suggests that the Eastern and Western Blocks of the NCC formed separately in the Archean, and an active margin was developed on the Eastern Block between 2.5 and 1.85. Ga, when the two blocks collided above an east-dipping subduction zone. A second presumes the Eastern Block rifted from an unknown larger continent at circa 2.7. Ga, and experienced a collision with an arc (perhaps attached to the western block) above a west-dipping subduction zone at 2.5. Ga, and the 1.85. Ga metamorphism is related to a collision along the northern margin of the craton when the NCC joined the Columbia supercontinent. A third model suggests two collisions in the Central Orogenic Belt, at 2.1 and 1.88. Ga, but recognizes an early undated deformation event. Recent seismic results reveal details of the deep crustal and lithospheric structure that support both the second and third models, showing that subduction beneath the Central Orogenic Belt was west-directed, and that there is a second, west-dipping paleosubduction zone located to the east of the COB dipping beneath the Western Block (Ordos Craton). The boundaries identified through geophysics do not correlate with the boundaries of the Trans-North China Orogen suggested in the first model, and the subduction polarity is opposite that predicted by that model. High-pressure granulite facies metamorphism at 1.85. Ga is not restricted to the "TNCO" as suggested by the first model, but is documented across the NCC, as predicted by the second model, suggesting a major continent-continent collision along the north margin of the craton at 1.85. Ga. Further, it has recently been shown that in the southern "TNCO", there is no record of metamorphism at circa 1.85. Ga, but only at 2.7-2.5. Ga, showing that the "TNCO", as defined as a circa 1.85. Ga orogen, does not exist. This is further confirmed by recent Re-Os isotopic studies which show that the subcontinental lithospheric mantle beneath the southern COB is late Archean in age, and that a province in the northern NCC is circa 1.8. Ga, correlating with the proposed collision belt of the NCC with the Columbia supercontinent across the entire NCC. The COB is an Archean convergent belt, re-worked in the Paleoproterozoic, and the Paleoproterozoic tectonism is widespread across the NCC, as predicted by the model whereby the previously amalgamated Eastern and Western Blocks experienced a continental collision with Columbia at circa 1.85. Ga, but uplift/exhumation rates are slow, necessitating a re-evaluation of the tectonic models of the NCC. © 2011 International Association for Gondwana Research. Source

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