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Articles by Bo Liu
Total Records ( 4 ) for Bo Liu
  Bo Liu , Zheng Qin , Rui Wang , You-Bing Gao and Li-Ping Shao
  The aim of this study is to solve the target assignment of coordinated distributed multi-agent systems. Earlier methods (e.g., neural network, genetic algorithm, ant colony algorithm, particle swarm optimization and auction algorithm) used to address this problem have proved to be either too slow or not stable as far as converging to the global optimum is concerned. To address this problem, a new algorithm is proposed which combines heuristic ant colony system and decentralized cooperative auction. Based on ant colony system, the decentralized cooperative auction is used to construct ants` original solutions which can reduce the numbers of blind search and then the original solutions are improved by heuristic approach to increase the system stability. The performance of the new algorithm is studied on air combat scenarios. Simulation experiment results show present method can converge to the global optimum more stably and faster by comparing the original methods.
  Zhijun Jian , Zhihui Wang , Ning Zhang , Siqing Fu , Bo Liu and Xin Hu
  In the voltage-fed Inductively Coupled Power Transfer (ICPT) system, input current increased when load become lighter especially no-load which led to system unstable. A method of frequency adjustment without adding additional links was presented which could realize the control of input power. The mathematical relationship between the input power and system operating frequency, load resistance, input voltage in the voltage-fed ICPT system was built based on mutual inductance theory. In order to improve the rapidity and accuracy of the control method, the neural network control strategy which included control network with three layers was added in the proposed method. Practical experiment illustrated that the method could make the system with good robustness when load changes in large scale. In instance, as the load resistance varied from 20-50 Ω, the input current returned to the reference value within a short time which verified that the proposed control approach was effective for ICPT system.
  Shu-Yun Shi , Yan Chen , Bo Liu , Yu-Kun Lu , Jia-Ning Xu , Xiao-Bing Cui and Ji-Qing Xu
  Two supramolecular compounds [Fe(2,2'-bipy)3]2[ V7vV9IvO38(Cl)] · 4.67H2O (1) and [Ni(enMe)3]2[ H4V5vV10IvO36(Cl)] · 2H2O (2) have been prepared under hydrothermal conditions and characterized by elemental analyses, IR, TGA, ESR, magnetic properties, and single crystal X-ray diffraction analyses. Crystal data for 1: tetragonal, I-42d, a = 13.6043(19), b = 13.6043(19), c = 50.544(10) Å, V = 9354(3) Å3; for 2: hexagonal, P6(3)/m, a = 12.6046(12), b = 12.6046(12), c = 22.563(5)Å, V = 3104.4(7) Å3. Compound 1 is constructed from cations [Fe(2,2'-bipy)3]3+, polyoxovanadates [ V7vV9IvO38(Cl)]6-, and water molecules. Compound 2 is composed of cations [Ni(enMe)3]2+, clusters [ H4 V5vV10IvO36(Cl)]8-, and water molecules. There are hydrogen-bonding interactions between polyoxovanadates, organic moieties, and/or water molecules in 1 and 2, forming different 2-D layered networks.
  Chase T. Archer , Lyle Burdine , Bo Liu , Anwarul Ferdous , Stephen Albert Johnston and Thomas Kodadek
  Destabilization of activator-DNA complexes by the proteasomal ATPases can inhibit transcription by limiting activator interaction with DNA. Modification of the activator by monoubiquitylation protects the activator from this destabilization activity. In this study, we probe the mechanism of this protective effect of monoubiquitylation. Using novel label transfer and chemical cross-linking techniques, we show that ubiquitin contacts the ATPase complex directly, apparently via Rpn1 and Rpt1. This interaction results in the dissociation of the activation domain-ATPase complex via an allosteric process. A model is proposed in which activator monoubiquitylation serves to limit the lifetime of the activator-ATPase complex interaction and thus the ability of the ATPases to unfold the activator and dissociate the protein-DNA complex.
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