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Consensus model of social network group decision-making based on trust relationship among experts and expert reliability

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Journal of Systems Engineering and Electronics 2023年第6期34卷 1576-1588页

作者： WANG Ya cai mei JIAN Xinglian School of Management Science and Engineering Nanjing University of Information Science and TechnologyNanjing 210044China

Due to people’s increasing dependence on social networks,it is essential to develop a consensus model considering not only their own factors but also the interaction between *** external trust relationship among experts and the internal reliability of experts are important factors in *** paper focuses on improving the scientificity and effectiveness of decision-making and presents a consensus model combining trust relationship among experts and expert reliability in social network group decision-making(SN-GDM).A concept named matching degree is proposed to measure expert ***,linguistic information is applied to manage the imprecise and vague *** degree is expressed by a 2-tuple linguistic model,and experts’preferences are measured by a probabilistic linguistic term set(PLTS).Subsequently,a hybrid weight is explored to weigh experts’importance in a *** a consensus measure is introduced and a feedback mechanism is developed to produce some personalized recommendations with higher group ***,a comparative example is provided to prove the scientificity and effectiveness of the proposed consensus model.

关键词： social network group decision-making(SN-GDM) trust relationship expert reliability consensus model probabilistic linguistic term set(PLTS).

Efect of light response on the photocatalytic activity of BiOClxBr1-x in the removal of Rhodamine B from water

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International Journal of Minerals,Metallurgy and Materials 2013年第11期20卷 1089-1096页

作者： Xiao-ming Mao cai-mei Fan College of Chemistry and Chemical Engineering Taiyuan University of Technology

BiOClxBr1-x catalysts were synthesized through an alcoholysis method and characterized by X-ray diffraction （XRD）, transmission electron microscopy （TEM）, high-resolution transmission electron microscopy （HRTEM）, and diffuse reflectance spectroscopy （DRS）. The as-prepared photocatalysts were found to be tetragonal crystal structure and lamellar plate morphology. Their band gaps were between 3.44 and 2.83 eV. The effect of light response on the photocatalytic activity of BiOClxBrl-x was investigated by degradation of Rhodamine B （RhB）. Complete removal of RhB from water was realized under simulated sunlight irradiation for 50 min with BiOC10.5Br0.5. Mechanism studies showed that photo- generated holes and superoxide anion radicals played important roles in RhB photodegradation. The results of chemical oxygen demand （COD） confirmed RhB mineralization. The effect of light response on the activity of BiOClxBr1-x was further investigated under monochromatic light irradiation, and BiOCl0.5Br0.5 catalyst exhibited the highest activity. Furthermore, BiOC10.5Br0.5 exhibited high stability, suggesting its practical application for the removal of RhB pollutant from water.

关键词： photocatalysts photocatalytic activity light response degradation organic pollutants

Factors influencing the pumpability of unclassified tailings slurry and its interval division

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International Journal of Minerals,Metallurgy and Materials 2019年第4期26卷 417-429页

作者： Peng Li Yun-bing Hou mei-feng cai School of Civil and Resource Engineering University of Science and Technology Beijing Key Laboratory of High-Efficient Mining and Safety of Metal Mines (Ministry of Education of China) University of Science and Technology Beijing Beijing Key Laboratory of Urban Underground Space Engineering University of Science and Technology Beijing School of Resource and Safety Engineering China University of Mining and Technology (Beijing)

Tailings consolidation and discharging technology is currently a popular means for disposing tailings in China. In this study, we describe a laboratory investigation of the unclassified tailings slurry from an iron mine and analyze the influence of the concentration,amount of consolidation agent, and types of consolidation agent on the pumpability in terms of the slump, slump flow, and bleeding rate of the slurry. The results indicate that an increase in concentration leads to a pronounced decrease in the magnitude of the slump, slump flow,and the bleeding rate. Compared with the consolidation agents P.O42.5 and P.S.A32.5, the new consolidation agent offers substantial advantages in promoting the pumping performance of the slurry. The concentration more strongly affects the slump, slump flow, and the bleeding rate of the slurry than does the amount of the consolidation agent. We also constructed the pumpability interval of the slurry on the basis of the slump and bleeding rate and accordingly determined the proportioning parameters of the slurry with a concentration of 75 wt% to79 wt% and with a consolidation agent concentration of 2 wt%. In addition, we discussed the pumpability mechanism of the slurry.

关键词： tailings consolidation and discharging technology unclassified tailings new consolidation agent pumpability interval pumpability mechanism

Prediction of Grain Size for Blade Precision Forging Process under Thermo-Mechanical Coupling

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Journal of Materials Science & Technology 2003年第z1期19卷 156-158页

作者： He YANG Yuli LIU Wang cai mei ZHAN College of Materials Science and Engineering Northwestern Polytechnical University Xi′an 710072 China College of Materials Science and Engineering Northwestern Polytechnical University Xi′an 710072 China College of Materials Science and Engineering Northwestern Polytechnical University Xi′an 710072 China College of Materials Science and Engineering Northwestern Polytechnical University Xi′an 710072 China

Blade precision forging is a high temperature and large plastic deformation process. Interaction of deformation andheat conduction results in producing large temperature unevenness inside the billet. The unevenness has a greateffect on the mechanical property and microstructure of the forged blade. However, internal quality of the blade isdecided by its microstructure, it is necessary to conduct a research on the microstructure of the blade forging *** a blade with a tenon as an object, its precision forging process is simulated and analyzed using a 3D coupledthermo-mechanical FEM code. And based on the prediction model of Ti-6Al-4V presented by the predecessor, astudy of the evolution of grain size in the forging process is made. The distribution characteristics of grain size intypical sections are obtained under various deformation degrees. This study may provide a base for designing theblade forging process and working out its parameters.

关键词： Blade, Precision forging, Grain size, Prediction

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International Journal of Minerals,Metallurgy and Materials 2009年第2期16卷 135-142页

作者： Zhuo-ying Tan Si-jing Wang mei-feng cai State Key Laboratory of High-Efficient Mining and Safety of Metal Mines Ministry of Education of China Beijing 100083 China School of Civil and Environmental Engineering University of Science and Technology Beijing Beijing 100083 China Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China School of Civil Engineering Tsinghua University Beijing 100084 China

An instrumented drilling system can be applied for the acquisition of drilling process parameters. The system can provide continuous and huge data for geotechnical engineering. However, due to the complexity of ground strata, the variation in the drilling parameters with stratigraphical characteristics is great and the correlation between likely comparable parameters is not high, which limits the use of conventional correlation approaches in this field. How to use the data for engineering and how to get a reasonable interpretation for the relationships among the drilling parameters, as well as between a drilling parameter and formational characteristics, become a technical choke point for the development and application of the instrumented drilling system. Based on similarity criteria, the extraction of sample data and characteristics, the pretreatment of data and feature matching algorithms have been analyzed and an approach of slope coefficient searching identification has been established. A case study was carried out for the similarity between the rotational speed of the drill bit, flushing pressure, and effective thrust force graphics in general weathered granite. The result shows that the similarity coefficients between the rotational speed of the drill bit, flushing pressure, and effective thrust force are 0.72 and 0.83, respectively. Although there are differences between the distances of the graphics, the curves of both rotational speed and flushing pressure agree with the effective thrust curve in shape, which provides a possible method for the identification of various formations by use of the similarity between feature drilling parameters.

关键词： rock drilling process parameters similarity identification slope coefficient

Electrocatalysis of Oxygen Evolution Reaction on Ti/SnO_2+RuO_2+MnO_2/MnO_2 Electrode in Sulfuric Acid Solution

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Chemical Research in Chinese Universities 2001年第3期17卷 287-292页

作者： LIANG Zhen-hai FAN cai-mei SUN Yan-ping Laboratory of Electrochemical Engineering Research College of Chemical EngineeringTaiyuan University of TechnologyTaiyuan 030024P.R.China

The Ti-Supported MnO_2 electrode was modified by introducing SnO_2+RuO_2+MnO_2 as an intermediate layer into the Ti/MnO_2 interface. The anodic polarization curves were measured at various temperatures ranging from 30 to 80℃ and the activation energy for the oxygen evolution reaction was evaluated. The experimental activation energy increased linearly with increasing the overpotential. The activation energy at the equilibrium potential was linearly correlated with the difference between the crystal field stabilization energies of Mn^(4+) at initial state and Mn^(4+) at transition state. The electrocatalysis characteristics of the anode were discussed by means of the mechanism of the substitution reaction of the ligand(S_N1 and S_N2) and molecular orbital theory. The results show that the anode has better electrocatalystic characteristics.

关键词： Ti/SnO2+RuO2+MnO2/MnO2 anode Electroeatalysis Activation energy Crystal field theory Molecular Orbital theory

Bifurcations and Chaos in Duffng Equation with Damping and External Excitations

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Acta Mathematicae Applicatae Sinica 2014年第2期30卷 483-504页

作者： mei-xiang cai Jian-ping YANG Jin DENG Institute of Mathematics and Physics Central South University of Forestry and Technology College of Science China Agriculture University Department of Mathematics and Physics Hunan Institute of Engineering

Duffing equation with damping and external excitations is investigated. By using Melnikov method and bifurcation theory, the criterions of existence of chaos under periodic perturbations are obtained. By using second-order averaging method, the criterions of existence of chaos in averaged system under quasi-periodic perturbations for Ω = nω ＋ εσ, n = 2,4,6 （where σ is not rational to ω） are investigated. However, the criterions of existence of chaos for n = 1, 3, 5, 7 - 20 can not be given. The numerical simulations verify the theoretical analysis, show the occurrence of chaos in the averaged system and original system under quasi- periodic perturbation for n = 1, 2, 3, 5, and expose some new complex dynamical behaviors which can not be given by theoretical analysis. In particular, the dynamical behaviors under quasi-periodic perturbations are different from that under periodic perturbations, and the period-doubling bifurcations to chaos has not been found under quasi-periodic perturbations.

关键词： Duffing equation Melnikov method second-order averaging method chaos

Pore size effects of nanoporous carbons with ultra-high surface area on high-pressure hydrogen storage

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Journal of Energy Chemistry 2015年第1期24卷 1-8页

作者： Zhen Geng Cunman Zhang Dabin Wang Xiangyang Zhou mei cai Clean Energy Automotive Engineering Center Tongji University School of Materials Science and Technology Tongji University School of Automotive Studies Tongji University Research & Development Center General Motors

In this work, the morphologies and pore structures of a series of corncob-derived activated carbons and zeolite templated carbon with ultrahigh surface area were carefully investigated by SEM, HRTEM and N2-sorption characterization technologies. The high-pressure hydrogen uptake performance was analyzed using standard Pressure-Composition-Temperature apparatus in order to study the pore size effects on hydrogen uptake. These as-obtained porous carbons showed different characteristics of pore size distribution as well as specific surface area. The results indicate that the most effective pores for adsorbing hydrogen depended on the storage pressure. These ultramicropores （0.65-0.85 nm） could be the most effective pores on excess H2 uptake at 1 bar, however, micropores （0.85-2 nm） would play a more important role in excess H2 uptake at higher pressure at 77 K. At room temperature, pore size effects on H2 uptake capacity were very weak. Both specific surface area and total pore volume play more important roles than pore size for H2 uptake at room temperature, which was clearly different from that at 77 K. For applications in future, the corncob-derived activated carbons can be more available than zeolite templated carbons at 77 K. Element doping enhanced hydrogen uptake could be main research direction for improving H2 uptake capacity at room temperature.

关键词： corncob activated carbon zeolite templated carbon hydrogen storage pore size effect

Transient receptor potential-related risk model predicts prognosis of hepatocellular carcinoma patients

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World Journal of Gastrointestinal Oncology 2023年第12期15卷 2064-2076页

作者： Xiao-cai mei Qian Chen Shi Zuo Department of Hepatobiliary Surgery Affiliated Hospital of Guizhou Medical UniversityGuiyang 550000Guizhou ProvinceChina Department of Organ Transplantation Affiliated Hospital of Guizhou Medical UniversityGuiyang 550000Guizhou ProvinceChina

BACKGROUND Members of the transient receptor potential(TRP)protein family shape oncogenic development,but the specific relevance of TRP-related genes in hepatocellular carcinoma(HCC)has yet to be *** To investigate the role of TRP genes in HCC,their association with HCC development and treatment was *** HCC patient gene expression and clinical data were downloaded from The Cancer Genome Atlas database,and univariate and least absolute shrinkage and selection operator Cox regression models were employed to explore the TRP-related risk *** on these analyses,clinically relevant TRP family genes were selected,and the association between the key TRP canonical type 1(TRPC1)gene and HCC patient prognosis was *** In total,28 TRP family genes were screened for clinical relevance,with multivariate analyses ultimately revealing three of these genes(TRPC1,TRP cation channel subfamily M member 2,and TRP cation channel subfamily M member 6)to be significantly associated with HCC patient prognosis(P<0.05).These genes were utilized to establish a TRP-related risk *** were separated into low-and high-risk groups based on the expression of these genes,and high-risk patients exhibited a significantly poorer prognosis(P=0.001).Functional analyses highlighted pronounced differences in the immune status of patients in these two groups and associated enriched immune ***1 was identified as a candidate gene in this family worthy of further study,with HCC patients expressing higher TRPC1 levels exhibiting poorer survival ***,quantitative,immunohistochemistry,and western blot analyses revealed increased TRPC1 expression in *** These three TRP genes help determine HCC patient prognosis,providing insight into tumor immune status and immunological *** findings will help design combination therapies including immunotherapeutic and anti-TRP agents.

关键词： Transient receptor potential family genes Hepatocellular carcinoma Transient receptor potential canonical type 1 Novel oncogene