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Time-Free Solution to 3-Coloring Problem Using Tissue P Systems

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Chinese Journal of Electronics 2016年第3期25卷 407-412页

作者： NIU yunyun xiao jianhua jiaNG yun School of Information Engineering China University of Geosciences in Beijing The Research Center of Logistics Nankai University School of Computer Science and Information Engineering Chongqing Technology and Business University

In most of traditional P systems, each rule has the same execution time. That way of using the rules is not quite realistic from a biological point of view, because external conditions always change in an unpredicted manner such that different reaction may take different time to execute. In this work, we investigate the computation efficiency of tissue P systems by removing the restriction that each rule should complete in one time unit. The timed tissue P system is constructed by adding a time mapping to the rules to specify the execution time for each rule.A uniform and time-free solution to 3-coloring problem is proposed, where the execution time of the computational processes involved can vary arbitrarily and the output produced is always the same.

关键词： Membrane computing Tissue P system Time-free solution 3-Coloring problem

Numerical simulation of pollution process due to resuspension of bed materials adsorbing pollutants in alluvial rivers

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Science China(Technological Sciences) 2015年第7期58卷 1280-1288页

作者： DING yun xiao Yang ZHONG DeYu State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Hohai University College of Water Conservancy and Hydropower Engineering Hohai University State Key Laboratory of Hydroscience and Engineering Tsinghua University

Resuspension of bed materials absorbing pollutants potentially poses unpredictable challenges to water management in alluvial rivers and its mechanism of transport has not been widely *** this study,a transport equation that defines the movement of pollutants adsorbed on the bed materials in the active bed layer is established,on the basis of mass conservation law and continuum *** transport equation is coupled into the 1-D mathematical model to numerically investigate water pollution process due to the scour of the bed sediment adsorbing *** with the situation in which the dynamics of the active bed layer is not considered indicate that the periodical evolution of the bed layer plays an innegligible role in the pollution process due to sediment ***,comparisons of the results with available experimental observations are presented,and fairly good agreement is obtained.

关键词： resuspension pollutants alluvial rivers active bed layer

Science Letters:Evaluation of a kinetic uricase method for serum uric acid assay by predicting background absorbance of uricase reaction solution with an integrated method

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2006年第6期7卷 497-502页

作者： LIAO Fei ZHAO yun-sheng ZHAO Li-na TAO jia ZHU xiao-yun LIU Lan Laboratory of Bioinformatics and Molecular Engineering Chongqing University of Medical Sciences Chongqing 400016 China Department of Biochemistry and Molecular Biology Chongqing University of Medical Sciences Chongqing 400016 China Affiliated Children＇s Hospital Chongqing University of Medical Sciences Chongqing 400016 China

A patented kinetic uricase method was evaluated for serum uric acid assay. Initial absorbance of the reaction mixture before uricase action （A0） was obtained by correcting the absorbance at 293 nm measured before the addition of uricase solution, and background absorbance （Ab） was predicted by an integrated method. Uric acid concentration in reaction solution was calculated from AA, the difference between A0 and Ab, using the absorptivity preset for uric acid. This kinetic uricase method exhibited CV〈4.3% and recovery of 100%. Lipids, bilirubin, hemoglobin, ascorbic acid, reduced glutathione and xanthine 〈0.32 mmol/L in serum had no significant effects. △A linearly responded to 1.2 to 37.5 μmol/L uric acid in reaction solution containing 15 μl serum. The slope of linear response was consistent with the absorptivity preset for uric acid while the intercept was consistent with that for serum alone. Uric acid concentrations in clinic sera by different uricase methods positively correlated to each other. By Bland-Altman analysis, this kinetic uricase method accorded with that by quantifying the total change of UV absorbance on the completion of uricase reaction. These results demonstrated that this kinetic uricase method is reliable for serum uric acid assay with enhanced resistance to both xanthine and other common errors, wider range of linear response and much lower cost.

关键词： Background absorbance Bland-Altman analysis Kinetic uricase method Reaction curve fitting Serum uric acid assay

DIRECT ITERATIVE METHODS FOR RANK DEFICIENT GENERALIZED LEAST SQUARES PROBLEMS

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Journal of Computational Mathematics 2000年第4期18卷 439-448页

作者： Jin-yun Yuan xiao-qing Jin Departamento de Matematica Universidade Federal do ParanaCuritibaBrazil Faculty of Science and Technology University of MacaoMacaoChina

The generalized least squares (LS) problem ... (Ax - b)[sup TW[sup -1](Ax - b) appears in, many application areas. Here W is an m × m symmetric positive definite matrix and A is an m × n matrix with m ≥ n. Since the problem has many solutions in rank deficient case, some special preconditioned techniques are adapted to obtain the minimum 2-norm solution. A block SOR method and the preconditioned conjugate gradient (PCG) method are proposed here. Convergence and optimal relaxation parameter for the block SOR method are studied. An error bound for the PCG method is given. The comparison of these methods is investigated. Some remarks on the implementation of the methods and the operation cost are given as well. [ABSTRACT FROM AUTHOR]

关键词： rank deficient generalized LS problem block SOR method PCG method convergence optimal parameter

The microstructure of a single crystal superalloy after different aging heat treatments

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Rare Metals 2018年第3期37卷 210-216页

作者： xiao-Dai Yue jia-Rong Li xiao-Guang Wang Science and Technology on Advanced High Temperature Structural Materials Laboratory Beijing Institute of Aeronautical Materials

To study the influence of aging heat treatments on the microstructure of single crystal superalloys with high content of refractory elements and optimal the aging heat treatment regimes, a single crystal superalloy containing 22 wt% refractory elements was *** show that for the experimental alloy, even the homogenization-solution heat treatment for 25 h cannot homogenize the alloying elements completely. During primary aging heat treatment, γ＇ phase grows larger and turns to regular cubes. Higher aging temperature induces larger γ＇ cubes. For specimens with primary aging heat treated at 1120 ℃,γ＇ morphology does not change apparently during secondary aging heat treatment. For specimens with primary aging heat treatment at 1150 ℃,γ＇phase in interdendrite grows obviously comparing with that in dendrites. By analyzing the precipitating kinetics of γ＇phase, it is found that owning to the dendrite segregation and different aging heat treatment temperatures, γ＇ phase at different regions grows under the control of different factors at different aging heat treatment stages. The two controlling factors that are driving forces of phase transformation and element diffusion rate induce obviously different growth rates of γ＇ phase. As a result, the γ＇-precipitating behaviors are variable based on different solute concentrations and aging temperatures. For advanced single crystal superalloys that are supposed to be used at relatively high temperatures, the final γ＇ size after aging heat treatment is suggested to be close to the crossing point of diffusion controlling curve and driving force controlling curve corresponding to the serving temperature. And then,high-temperature properties can be improved.

关键词： Single crystal superalloy Aging heat treatment γ' precipitation Kinetics

SIMULATION OF THE TWO PHASE FLOW OF DROPLET IMPINGEMENT ON LIQUID FILM BY THE LATTICE BOLTZMANN METHOD

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Journal of Hydrodynamics 2012年第2期24卷 292-297页

作者： GUO jia-hong WANG xiao-yong Shanghai Key Laboratory of Mechanics in Energy Engineering Shanghai Institute of Applied Mathematics andMechanicsShanghai UniversityShanghai 200072China

A Lattice Boltzmann Method （LBM） with two-distribution functions is employed for simulating the two-phase flow induced by a liquid droplet impinging onto the film of the same liquid on solid *** model is suitable for solution of twophase flow problem at high density and viscosity ratios of liquid to vapor and phase transition between liquid and its *** roles of the vapor flow,the density ratio of liquid to vapor and the surface tension of the droplet in the splashing formation are *** is concluded that the vapour flow induced by the droplet fall and splash in the whole impinging process may affect remarkably the splash *** the case of large density ratio of liquid to vapor a crown may engender after the droplet collides with the ***,for the case of small density ratio of liquid to vapor a ＂bell＂ like splash may be observed.

关键词： droplet impact film two-phase flow Lattice Boltzmann Method (LBM) numerical simulation

Analytical solution for the time-fractional heat conduction equation in spherical coordinate system by the method of variable separation

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Acta Mechanica Sinica 2011年第6期27卷 994-1000页

作者： Ting-Hui Ning xiao-yun jiang School of Mathematics Shandong University 250100 Jinan China

In this paper,using the fractional Fourier law,we obtain the fractional heat conduction equation with a time-fractional derivative in the spherical coordinate *** method of variable separation is used to solve the timefractional heat conduction *** Caputo fractional derivative of the order 0 〈 α≤ 1 is *** solution is presented in terms of the Mittag-Leffler *** results are illustrated graphically for various values of fractional derivative.

关键词： Fractional Fourier law Fractional heat conduction equation - Spherical coordinate system - The separation of variables Mittag-Leffler function

Necessary and sufficient checkpoint selection for temporal verification of high-confidence cloud workflow systems

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Science China(Information Sciences) 2015年第5期58卷 33-48页

作者： WANG FuTian LIU xiao YANG yun School of Computer Science and Technology Anhui University Shanghai Key Laboratory of Trustworthy Computing East China Normal University School of Software and Electrical Engineering Swinburne University of Technology

On-time completion is an important temporal Qo S(Quality of Service) dimension and one of the fundamental requirements for high-confidence workflow systems. In recent years, a workflow temporal verification framework, which generally consists of temporal constraint setting, temporal checkpoint selection, temporal verification, and temporal violation handling, has been the major approach for the high temporal Qo S assurance of workflow systems. Among them, effective temporal checkpoint selection, which aims to timely detect intermediate temporal violations along workflow execution plays a critical role. Therefore, temporal checkpoint selection has been a major topic and has attracted significant efforts. In this paper, we will present an overview of workflow temporal checkpoint selection for temporal verification. Specifically, we will first introduce the throughput based and response-time based temporal consistency models for business and scientific cloud workflow systems,respectively. Then the corresponding benchmarking checkpoint selection strategies that satisfy the property of"necessity and sufficiency" are presented. We also provide experimental results to demonstrate the effectiveness of our checkpoint selection strategies, and finally points out some possible future issues in this research area.

关键词： workflow system workflow temporal verification temporal checkpoint selection business workflow scientific workflow quality of se

Traditional Chinese medicine Euodiae Fructus:botany,traditional use,phytochemistry,pharmacology,toxicity and quality control

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Natural Products and Bioprospecting 2023年第1期13卷 665-707页

作者： Si-jia xiao Xi-Ke Xu Wei Chen jia-yun Xin Wen-Lin Yuan Xian-Peng Zu yun-Heng Shen Department of Natural Medicinal Chemistry School of PharmacyNaval Medical UniversityNo.325 Guohe RoadYangpu DistrictShanghai 200433China School of Pharmacy Shandong University of Traditional Chinese MedicineJinan 250355China

Euodiae Fructus,referred to as“Wuzhuyu”in Chinese,has been used as local and traditional herbal medicines in many regions,especially in China,Japan and Korea,for the treatment of gastrointestinal disorders,headache,emesis,aphtha,dermatophytosis,dysentery,*** investigations into their chemical and pharmacological properties have been ***,interest in this plant has been focused on the different structural types of alkaloids like evodiamine,rutaecarpine,dehydroevodiamine and 1-methyl-2-undecyl-4(1H)-quinolone,which exhibit a wide range of pharmacological activities in preclinical models,such as anticancer,antibacterial,anti-inflammatory,anti-cardiovascular disease,*** review summarizes the up-to-date and comprehensive information concerning the botany,traditional uses,phytochemistry,pharmacology of Euodiae Fructus together with the toxicology and quality control,and discusses the possible direction and scope for future research on this plant.

关键词： Euodiae Fructus Traditional uses Phytochemistry Pharmacology Toxicology