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Practical stabilization of receding-horizon control

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Journal of central south university of Technology 2001年第4期8卷 268-271页

作者： LIU Bi yu,GUI Wei hua,MU Min (College of Information Science and Engineering, central south university, changsha 410083. china) 1. College of Information Science and Engineering Central South University 410083 Changsha China

The purpose of this work is to propose a scheme to stabilize the predictive control systems in the practical stability sense. In the paper, the authors dealt with a general discrete predictive control system x j+1|t =f(x j|t , u j|t ) by using the Lyapunov direct method combining with receding horizon control technique, and presented a new condition to guarantee the practical stabilization of the systems. With the proposed results, one can design the optimal controllers easily to practically stabilize the predictive control systems.

关键词： receding-horizon control practical stability Lyapunov function nonlinear system optimization

Inhibitory effects of cariporide on LPC-induced expression of ICAM-1 and adhesion of monocytes to smooth muscle cells in vitro

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Acta Pharmacologica Sinica 2006年第10期27卷 1326-1332页

作者： Zhi LI Tao SONG Gui-zhen LIU Li-ying LIU~2 Department of pharmacology,Pharmaceutical College,central south university,changsha 410078,{3. Department of pharmacology Pharmaceutical College Central South University Changsha 410078 China

Aim:To explore the effects of cariporide on the expression of intercellular adhe-sion molecule-1(ICAM-1)and the adhesion of monocytes to vascular smoothmuscle cells(SMC)in ***:Monocytes were isolated from humanperipheral blood by the Ficoll-Hypaque *** expression of ICAM-1 inSMC was detected by *** adhesion of monocytes to SMC was stimu-lated by lysophosphatidylcholine(LPC).The adhesion ratio of monocytes wasassayed by measuring protein *** intracellular pH([pH]i)of SMC wasmeasured with 2’,7’-bis(2-carboxyethyl)-5,6-carboxyfluorescein(BCECF).Results:Preincubation of SMC with LPC alone(5 μg/mL)for 4 h markedly enhanced theexpression of ICAM-1 in SMC and the rate of the adhesion of monocytes to SMCin a concentration-dependent and time-related *** simultaneously alsoinduced an increase of[pH]ivalue in *** concentration-dependentlyreduced the adhesion ratio of monocytes to SMC and the expression of ICAM-1in SMC induced by *** inhibitory effects of cariporide on the expression ofICAM-1 in SMC and the adhesion of monocytes to SMC also were associatedwith blocking LPC-induced elevation of the[pH]ivalue in ***:LPC-induced monocyte-SMC adhesion may be mediated via activation of theNa~+/H~+(NHE)*** action mechanism of cariporide may be related withinhibition of activation of the Na~+/H~+ exchanger of plasma membranes and ICAM-1expression on the surface of SMC induced by LPC.

关键词： Na~+/H~+ exchanger cariporide lysophosphatidylcholine intercellular adhesion molecule-l monocyte smooth muscle cells

Electronic Structures and Properties of V, Nb and Ta Metals

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Journal of central south university 2000年第1期12卷 7-11页

作者： HE Yu,XIE You qing (Department of Materials Science and Engineering, central south university of Technology, changsha 410083. china) 1. Department of Materials Science and Engineering Central South University of Technology 410083 Changsha China

The electronic structures of pure V, Nb and Ta metals with bcc structure were determined by one atom (OA) theory. According to the electronic structures of these metals, their potential curves, cohesive energies, lattice parameters, elasticity and the dependence of linear thermal expansion coefficients on temperature were calculated. The electronic structures and characteristic properties of these metals with fcc and hcp structures and liquid states were studied.

关键词： electronic structure potential curve cohesive energy lattice parameter elasticity linear thermal expansion efficient V Nb Ta

A NEW METHOD FOR CLASSIFICATION OF ROCK DRILLABILITY

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中国有色金属学会会刊：英文版 1993年第3期3卷 76-80页

作者： Lu, Fan central-south university of Technology, {3. 410083. china

A New method of rock drillability classification for impregnated diamond drilling is recommended. The essence of the method is comparing the area of the slots cut respectively on a standard synthetic rock sample and the rock sample being classified by one diamond saw to determine the rock drillability in diamond core drilling. This method has the advantages of good in simulation and stable in comparison standard.

关键词： rock drillability classification diamond core drilling cutting-comparison method

Number of zero point for a polynomial in real field

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Chinese Science Bulletin 1997年第11期42卷 886-890页

作者： LIN Liang and LIU Yirong1. Guilin Institute of Technology, Guilin 541004, china 2. central south university of Technology, changsha 410083. china Guilin Institute of Technology Guilin 541004 China

IT is well known that for any real coefficient polynomial f(x) of degree n,how to determineits number of real zero points is a very important problem in theory of polynomial,as well as inapplications in mathematics,mechanics,physics and other *** way to solve thisproblem by using Euclidean mutual division as pointed out by Sturm is not simple and conve-nient for us to use the theoretic analyses for the above problem because the relation

关键词： polynomial real zero point coefficients.

Heat Capacity of Sodium Ditungstate Na_2W_2O_7(s)

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Chinese Chemical Letters 1998年第5期9卷 495-496页

作者： Shi Jun LIU Qi Yuan CHEN Ping Min ZHANG(Department of Chemistry, central south university of Technology, changsha 4l0083. Cent S Univ Technol Dept Chem Changsha 410083 Peoples R China

The heat capacity of Na2W2O7(s) has been measured using the dropcalorimetry method with a high temperature calorimeter HT1000 in the temperaturerange of 273.974K. The resultS can be represented by the equation C,o/J K... 详细信息

关键词： heat capacity sodium ditungstate,calorimetry

THE CYP2A13.ARG257CYS POLYMORPHISM IN CHINESE POPULATION

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THE CYP2A13 ARG257CYS POLYMORPHISM IN CHINESE POPULATION

Prediction of Superconductivity for Oxides Based on Structural Parameters and Artificial Neural Network Method

2004 National Meeting on pharmacology of Young Pharmacologists

作者： Xin-Yuan CHENG Hong-Hao ZHOU Institute of clinical pharmacology, central south university, {3., china

＜正＞ Human cytochrome P450 2A13.（CYP2A13. is involved in the activation of numeroustoxicants and carcinogens, especially in the metabolic activation of4-（methyl-nitrosamino）-1-（3.pyridyl）-1-butanone （NNK）, a major tobacco-specificcarcinogen. A functionally significant single nucleotide polymorphism （C3.75T） in exon 5 ofCYP2A13. which results in an amino acid substitution of Arg 257 to Cys, has been recentlyreported to exist in White, Black, Hispanic, and Asian population, with the variant 3.57Tallele frequencies being 1.9%, 14.4%, 5.8% and 7.7%, respectively. Since genetic backgrounddiffers between ethnic groups, our present study aims to characterize the CYP2A13.rg257Cys polymorphism in Chinese. 258 healthy Chinese Han volunteers were involved inthis study. Polymerase Chain reaction-restriction fragment length polymorphism （PCR-RFLP）assay was employed to genotype for the Arg257Cys polymorphism. Of all the 258 subjects,27 （10.5%） heterozygotes and 1（0.4%） homozygote for the 3.75T allele were detected. Thefrequency of the variant 3.75T allele in this Chinese population was 5.6% （95%CI:4.2%～7.0%）. The CYP2A13.Arg257Cys variant represents a common polymorphism inChinese, with the 3.75T allele frequency being similar to the Hispanic and Asian groups, butsignificantly lower than the Black.

关键词： CYP2A13 polymorphism frequency

来源： cnki会议评论

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Journal of Materials Science & Technology 2000年第4期16卷 435-438页

作者： Xueye WANG and Huang SONG (Department of Chemistry, Xiangtan university, Xiangtan 411105, china) Guanzhou QIU and Dianzuo WANG (Department of Mineral Engineering, central south university of Technology, {3. 410083. china) Department of Chemistry Xiangtan University Xiangtan 411105 China Department of Mineral Engineering Central South University of Technology Changsha 410083 China

Superconductive properties for oxides were predicted by artificial neural network (ANN) method with structural and chemical parameters as inputs. The predicted properties include superconductivity for oxides, distributed ranges of the superconductive transition temperature (Tc) for complex oxides, and Tc values for cuprate superconductors. The calculated results indicated that the adjusted ANN can be used to predict superconductive properties for unknown oxides.

关键词： Prediction of Superconductivity for Oxides Based on Structural Parameters and Artificial Neural Network Method

Empirical Criteria of Superconductivity for Some Oxides

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Journal of Materials Science & Technology 2000年第3期16卷 327-331页

The properties of superconductivity of some oxides were investigated by structural parametric diagrams or pattern recognition with structural chemical parameters. The essential criteria of superconductivity for some oxides have been obtained by using 109 oxides as the training set and seven parameters as features; the results illustrated that the electronegativity difference is the most important factor among seven parameters. Moreover, the regularity of superconductive transition temperature Tc for complex oxides is discussed by partial least squares (PLS) method.

关键词： Empirical Criteria of Superconductivity for Some Oxides