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A Problem about the Weak Hilbert Property

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Acta Mathematica Sinica,English Series 1998年第4期14卷 481-486页

作者： Zeng Guangxing, Departement of Mathematics and Systems Science, nanchang university, nanchang 330047, China Department of Mathematics and Systems Science Nanchang University Nanchang China

In this paper, we prove the main result: Let both (K, S) and (K*, S*) be preordered fields, and let (K*, S*) be a finitely generated extension of (K, S). If K* is transcendental over K, then (K*, S*) has the weak Hilbert property. This result answers negatively an open problem posed by the author in reference[1]. Moreover, some results on the weak Hilbert property are established. In this paper, we prove the main result: Let both (K, S) and (K*, S*) be preordered fields, and let (K*, S*) be a finitely generated extension of (K, S). If K* is transcendental over K, then (K*, S*) has the weak Hilbert property. This result answers negatively an open problem posed by the author in reference [1]. Moreover, some results on the weak Hilbert property are established.

关键词： Ordered field Preordered field The weak Hilbert property Positive definite polynomial

Quantum chemical study on the thermal rearrangements of HNCRCR'CO

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Chinese Journal of Chemistry 1996年第2期14卷 105-108页

作者： LI,Yong-Hong HONG,San-GuoDepartment of Chemistry,Jiangxi Normal university,nanchang,Jiangxi 330017,China Department of Chemistry Jiangxi Normal University Nanchang Jiangxi 330027 China

MINDO/3 molecular orbital theory has been used to study the thermal rearrangements of HNCRCR'*** results obtained show that the activation energy of this rearrangement depends on the migrating group R and the group R'.

关键词： Thermal rearrangement MINDO/3 MO method transition state intrinsic reaction coordinate (IRC)

Cerium-tannic acid passivation treatment on galvanized steel

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Rare Metals 2009年第3期28卷 284-288页

作者： LIU Guangming YU Fei YANG Liu TIAN Jihong DU Nan Key Laboratory of Nondestructive Testing （nanchang Hangkong university） Ministry of Education of China Nanchang 330063 China School of Aeronautic and Mechanical Engineering Nanchang Hangkong University Nanchang 330063 China

A novel cerium-tannic acid passivation treatment was performed on galvanized steel. The corrosion resistance of cerium-tannic passivated samples was tested by dropping test with 0.5 wt.% CuSO4 aqueous solution. The mass loss per unit area of passivated samples was measured after the corrosion in 0.5 mol/L NaCl ＋ 0.005 mol/L H2SO4 at room temperature for 96 h. The electrochemical behaviors of cerium, tannic acid, and cerium-tannic acid passivated samples on galvanized steel in 0.5 mol/L NaCl solution were investigated by polarization curves and electrochemical impendence spectra. The corrosion equivalent circuit was established according to the impedance characteristics. The results show that cerium-tannic acid treated samples exhibit better corrosion resistance than the sole cerium or tannic acid treated samples under the same condition. The mechanism of synergistic effect for cerium-tannic acid passivation on galvanized steel was discussed.

关键词： passivation cerium tannic acid galvanized steel corrosion

Preparation of Nano-Sized TiO2 Particles by Microemulsion Method

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稀有金属材料与工程 2006年第S3期 575-577页

作者： Shaohua Zhang~1 Bing Xie~2 Fengyi Li~3 Peng Xu~2 (1.School of Material Science and Engineering,nanchang Univeristy,nanchang 330047,China) (2.Analysis and Test Center,nanchang university,nanchang 330047,China) (3.School of Science,nanchang university,nanchang 330047,China)

Nano-sized titania powders have been prepared by hydrolysis of tetrabutyl titanate in the droplet of water/OP-7/pentanol/cyclohexane microemulsion *** effects of ingredient change on the water drop size and particle size were *** prepared TiO2was in the form of anatase after ***2was characterized by TG-TGA, FTIR,XRD to measure the transformation temperature,surface adsorption and average size.

关键词： TiO2 microemulsion nano

Stabilization for discrete-time fuzzy systems with Takagi-Sugeno's models:reduce the complexity

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Science China(Information Sciences) 2010年第12期53卷 2506-2513页

作者： WANG LiKui 1 & LIU XiaoDong 2 1 School of Mathematics and Information Science,nanchang Hangkong university,nanchang 330063,China 2 Research Center of Information and Control,Dalian university of Technology,Dalian 116024,China School of Mathematics and Information Science Nanchang Hangkong University Nanchang China Research Center of Information and Control Dalian University of Technology Dalian China

The problem of sate feedback control for discrete-time fuzzy systems with Takagi-Sugeno's models is investigated to reduce the computational burden.A stabilization condition is obtained by applying a new Lyapunov *** is shown that our new theorem is equivalent to an existing result in guaranteeing the stability of the fuzzy system but consumes less computational time than the *** effectiveness and the superiority of the proposed design approach are demonstrated by an example borrowed from the literature.

关键词： Takagi-Sugeno’s fuzzy model non-quadratic Lyapunov function linear matrix inequality

Investigations into quantum correlation of coupled qubits in a squeezed vacuum reservoir

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Chinese Physics B 2013年第2期22卷 86-91页

作者：嵇英华刘咏梅 Department of Physics Jiangxi Normal University Key Laboratory of Photoelectronics and Telecommunication of Jiangxi Province College of Mathematics and Information Science Jiangxi Normal University

In this paper,we investigate the quantum correlation of coupled qubits which are initially in maximally entangled mixed states in a squeezed vacuum *** compare and analyze the effects of squeezed parameters on quantum discord and quantum *** results show that in a squeezed vacuum reservoir,the quantum discord and quantum concurrence perform with completely opposite behaviors with the change of squeezed *** discord survives longer with the increase of squeezed amplitude parameter,but entanglement death is faster on the *** results also indicate that the classical correlation of the system is smaller than quantum discord in a vacuum reservoir,while it is bigger than quantum discord in a squeezed vacuum *** quantum discord and classical correlation are more robust than quantum concurrence in the two reservoir environments,which indicates that the entanglement actually is easily affected by decoherence and quantum discord has a stronger ability to avoid decoherence in a squeezed vacuum reservoir.

关键词： quantum correlation coupled qubits quantum discord concurrence

QUANTUM CHEMICAL STUDY ON THE THERMOLYSES OF 1，5－CYCLOOCTADIENE AND 4－VINYLCYCLOHEXENE

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Chinese Chemical Letters 1995年第6期6卷 487-490页

作者： San Guo HONG Shen WANG(Department of Chemistry,Jiangxi Normal university.nanchang 830027) Jiangxi Normal Univ Dept Chem Nanchang 330027 Peoples R China

MINDO/3 method *** used to study the thermolyses of 1,5-cyclooctadiene and *** results obtained show that the activation energies of the reta-determining ateps are 197.936and 225.534 ***.

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ROLE OF MoO3 AND La2O3 PROMOTERS IN Ni-CATALYZED METHANATION REACTIONS OF CO

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Journal of Energy Chemistry 1994年第3期 339-347页

作者： LUO Lei-Tao LI Feng-YiDepartment of Chemistry, nanchang university nanchang, Jiangxi 330047WANG Min-WeiDepartment of Chemical Engineeringnanchang university nanchang, Jiangxi 330029

A series of catalysts containing nickel were prepared by *** activity,heat resistance and sulfur resistance of catalysts were inves-tigated using catalytic *** experimental results show that the Ni/γ-AlOcatalysts containing molybdenum or lanthanum possess higher activity,better heat resistance and sulfur resistance than Ni/γ-*** sur-face behaviour of catalysts and the role of molybdenum or lanthanum in Ni-Mo-La/γ-AlOsystem have been studied by XRD,TEM,XPS and *** hasbeen shown that the addition of molybdenum or lanthanum can increase theconcentration of nickel atoms on the surface of catalysts,make the crystallinegranule of nickel smaller,increase the number of active centers of nickel andaffect the electronic structure of *** these avtions will improve thecatalytic activity and surface behaviour of catalllysts.

关键词： Ni MO AI TPR ROLE OF MoO3 AND La2O3 PROMOTERS IN Ni-CATALYZED METHANATION REACTIONS OF CO La

Antitumor Effect of a Novel Adeno-associated Virus Vector Targeting to Telomerase Activity in Tumor Cells

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Acta Biochimica et Biophysica Sinica 2004年第7期36卷 492-500页

作者： Yi-Gang WANG1,2#, Jin-Hui WANG1#, Yan-Hong ZHANG1, Qing GU2*, and Xin-Yuan LIU1* 1Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Graduate School of the Chinese Academy of Sciences, Shanghai 200031, China School of Life Science, nanchang university, nanchang 330047, China Institute of Biochemistry and Cell Biology Shanghai Institutes for Biological Sciences Chinese Academy of Sciences Graduate School of the Chinese Academy of SciencesShanghai 200031 China School of Life Science Nanchang UniversityNanchang 330047 China

Telomerase activity is a wide tumor marker. Human telomerase reverse transcriptase (hTERT), the catalytic subunit of the telomerase, is transcriptionally upregulated exclusively in about 90% of cancer cells. In this study, we constructed a novel adeno-associated virus (AAV) vector containing the human interferon-β (hIFN-β) gene under the control of hTERT promoter (AAV-hTERT-hIFN-β) and investigated its antitumor effect against various human cancer cells in vitro. AAV-hTERT-hIFN-β displayed cancer-specific hIFN-β expression and cytotoxicity. The cytotoxic ratio was positively correlated with the time length of infection. AAV-hTERT-hIFN-β-mediated apoptotic morphology was observed by transmission electron microscopy. Flow cytometry assay also revealed that the cytotoxicity of AAV-hTERT-hIFN-β was mainly an apoptotic process. These data indicate that AAV in combination with hTERT-mediated therapeutic gene expression may open new possibilities for long-lasting and targeting gene therapy of varieties of cancers.

关键词： adeno-associated virus (AAV) telomerase hTERT promoter human interferon-β cancer