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Multi-Criteria Decision Making Based on Correlation coefficient of Triangular Intuitionistic Fuzzy Numbers

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Journal of Shanghai Jiaotong university(Science) 2019年第4期24卷 480-484页

作者：吴迪闫相斌彭锐马晓洋 School of Management Xi'an Jiaotong UniversityXi'an710049China Donlinks School of Economics andManagement University of Science and Technology BeijingBeijing100083China School of Economics andManagement Beijing University of TechnologyBeijing100124China

We study a multi-criteria fuzzy decision-making method based on weighted triangular intuitionistic fuzzy number correlation coefficients. Under the scenario that criteria weights for alternatives are completely unknown, triangular intuitionistic fuzzy method can not only supplement the insufficiency of the method based on the distance but also endow more information to the estimation and reduce the loss of evaluation information.Among the triangular numbers, two boundary numbers are the maximum and minimum values of the interval respectively, and the medium number is the most possible value under subjective estimation. Using this method,we propose a new way to obtain the criteria weights with more information quantity. By ranking the relative closeness of the weighted correlation coefficients between each alternative, and the critical and ideal alternatives,we show the method to figure out the most suitable alternative based on the expected criteria. An illustrative example is also taken into account to prove the effectiveness of the model.

关键词： multi-criteria decision making correlation coefficient triangular intuitionistic fuzzy numbers relative closeness

A Double Varying-coefficient Modeling Approach for Analyzing Longitudinal Observations

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Acta Mathematicae Applicatae Sinica 2019年第3期35卷 671-688页

作者： Qun-fang XU Rui LI School of Business Ningbo UniversityNingbo 315211China School of Statistics and Information Shanghai University of International Business and EconomicsShanghai 201620China Key Laboratory of Advanced Theory and Application in Statistics and Data Science East China Normal UniversityMinistry of EducationShanghai 200062China

The identification of within-subject dependence is important for constructing efficient estimation in longitudinal data models.In this paper,we proposed a flexible way to study this dependence by using nonparametric regression models.Specifically,we considered the estimation of varying coefficient longitudinal data model with non-stationary varying coefficient autoregressive error process over observational time quantum.Based on spline approximation and local polynomial techniques,we proposed a two-stage nonparametric estimation for unknown functional coefficients and didn’t not drop any observations in a hybrid least square loss framework.Moreover,we showed that the estimated coefficient functions are asymptotically normal and derived the asymptotic biases and variances accordingly.Monte Carlo studies and two real applications were conducted for illustrating the performance of our proposed methods.

关键词： autoregressive process double varying coefficient irregular time quantum locally linear

Water inflow forecasting for tunnel considering nonlinear variation of permeability coefficient

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Journal of Central South University 2017年第7期24卷 1612-1618页

作者：程盼赵炼恒张少伟李亮申志强宁鹏飞张泽海 Department of Civil Engineering College of Basic EducationNational University of Defense Technology School of Civil Engineering Central South University

To assess the water inflow which is more suitable to the actual conditions of tunnel,an empirical correlation about the permeability coefficient changing with depth is introduced.Supposing that the surrounding rock is heterogeneous isotropy,the formula for calculating water inflow of tunnel with the nonlinear variation of permeability coefficient is deduced.By the contrast analysis with the existing formulas,the presented method has the similar value to them;moreover,the presented method has more simple form and easy to use.Due to parameter analysis,the water inflow decreases after considering the nonlinear variation of permeability coefficient.When the attenuation coefficient a>0,the water inflow increases first till reaches the maximum at a certain depth,then decreases and is close to 0 finally if deep enough.Thus,it is better to keep away from the certain depth where it is with the maximum water inflow for safe operation and economical construction,and reduce the water damage.Based on the analysis,the radius of tunnel has less impact on the amount of water inflow,and the water inflow just increases by 6.7% when the radius of tunnel increases by 1 m.

关键词： water inflow forecasting heterogeneous isotropy of surrounding rock permeability coefficient tunnel

Influence of 235U enrichment on the moderator temperature coefficient of reactivity in a graphite-moderated molten salt reactor

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Nuclear Science and Techniques 2019年第11期30卷 149-159页

作者： Xiao-Xiao Li De-Yang Cui Yu-Wen Ma Xiang-Zhou Cai Jin-Gen Chen Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China CAS Innovative Academies in TMSR Energy System Chinese Academy of SciencesShanghai 201800China University of Chinese Academy of Sciences Beijing 100049China

To optimize the temperature coefficient of reactivity(TCR)for a graphite-moderated and liquid-fueled molten salt reactor,the effects of fuel salt composition on the fuel salt temperature coefficient of reactivity(FSTC)were investigated in our earlier work.In this study,we aim to provide a more comprehensive analysis of the TCR by considering the effects of the graphite-moderator temperature coefficient of reactivity(MTC).The effects of^235U enrichment and heavy metal(HM)proportion in the salt mixture on the MTC are investigated from the perspective of the six-factor formula based on a full-core model.For the MTC(labeled“αTM”),the temperature coefficient of the fast fission factors(αTM(ε))is positive,while those of the resonance escape probability(αTM(p)),the thermal reproduction factor(αTM(η)),the thermal utilization factor(αTM(f)),and the total non-leakage probability(αTM(A))are negative.The results reveal that the magnitudes ofαTM(ε)andαTM(p)for the MTC are similar.Thus,variations in the MTC with^235U enrichment for different HM proportions are mainly dependent onαTM(η),αTM(A),andαTM(f),but especially on the former two.To obtain a more negative MTC,a lower HM proportion and/or a lower 235U enrichment is recommended.Together with our previous studies on the FSTC,a relatively soft neutron spectrum could strengthen the TCR with a sufficiently negative MTC.

关键词： Molten salt reactor(MSR) Moderator temperature coefficient of reactivity(MTC) Six-factor formula

Relation between stabilization energy, crystal field coefficient and the magnetic exchange interaction for Tb^(3+) ion

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Rare Metals 2006年第z1期25卷 602-604页

作者： ZHANG Xiangmu MA Wenjuan CUI Shuwen WANG Lihua Physics Department Cangzhou Normal College Cangzhou 061001 China Physics Department Cangzhou Normal College Cangzhou 061001 China Institute of Mechanics Chinese Academy of Sciences Beijing 100080 China Physics Department Cangzhou Normal College Cangzhou 061001 China

Based on a single ion model, Hamiltonian of the simplest form about magnetocrystalline anisotropy for Tb3+ ion was solved by using the numerical method. The relation between the stabilization energy, crystal field coefficient B20 and the magnetic exchange interaction was studied as temperature approaches to 0 K. The results show that the stabilization energy contributed by Tb3+ is linear with crystal field coefficient B20 approximately, but it is insensitive to the change of magnetic exchange interaction for the strong magnetic substances such as TbCo5, Tb2Co17 and Tb2Fe14B compounds.

关键词： single ion model magnetic exchange interaction crystal field coefficient stabilization energy

The Value of Apparent Diffusion coefficient in Differential Diagnosis of Ovarian Cystic Adenoid Tumors

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Proceedings of Anticancer Research 2019年第2期3卷 1-6页

作者： Lin Sun Ruirui Xu Wei Yan Meng Zhao Fei Chen Department of Radiology Binzhou People’s HospitalBinzhouShandong256600China Department of Nephrology Binzhou People’s HospitalBinzhouShandong256600China Department of Pathology Binzhou People’s HospitalBinzhouShandong256600China

Objective:To quantitatively analyze apparent diffusion coefficient(ADC)value of cystic composition and solid composition in ovarian cystadenocarcinoma,borderline cystadenoma and cystadenoma by 3.0T magnetic resonance imaging(MRI),and to investigate its diagnostic and differential diagnostic values in ovarian cystic adenoid tumors.Methods:Retrospective analysis was carried out on 28 patients with ovarian cystic adenoid tumor as confirmed by surgical and pathological examinations.Examination was performed by Siemens 3.0T MRI scanner.Tumor size,margin,composition(cystic or solid),signal characteristic and presence of ascites were observed.Combined with localization using T2WI and diffusion weighted imaging(DWI),ADC value was calculated from ADC mapping using region of interest ROI(the largest surface area of cystic and solid compositions in tumor).Statistical analysis was performed.Results:Among the 28 ovarian tumors,there were 13 cases of cystadenomas(5 serous cystadenomas and 9 mucinous cystadenomas),4 borderline mucinous cystadenomas and 11 cystadenocarcinoma(9 serous cystadenocarcinoma and 2 mucinous cystadenocarcinoma).There was no significant intragroup difference in ADC values of cystic composition and solid composition in ovarian cystadenoma and cystadenocarcinoma respectively(P>0.05).The ADC value of solid composition between benign cystadenoma and borderline cystadenoma(P0.05).Conclusion:Quantitative analysis of ADC value of solid composition using 3.0T MRI has great value in differential diagnosis of benign and malignant ovarian cystic adenoid tumors.Its combination with conventional MRI method can improve the accuracy of diagnosis of ovarian cystic adenoid tumors.

关键词： Apparent diffusion coefficient Magnetic resonance imaging Ovarian cystadenoma Cystadenocarcinoma Borderline cystadenoma

Calculation of photon attenuation coefficient and dose rate in concrete with the addition of SiO_2 and MnFe_2O_4 nanoparticles using MCNPX code and comparison with experimental results

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Nuclear Science and Techniques 2018年第11期29卷 152-158页

作者： M.Hassanzadeh S.M.Sadat Kiai Reactor and Nuclear Safety School Nuclear Science and Technology Research Institute (NSTRI) Plasma and Nuclear Fusion Research School Nuclear Science and Technology Research Institute (NSTRI)

One of the most important safety features of nuclear facilities is the shielding material used to protect the operating personnel from radiation exposure. The most common materials used in radiation shielding are concretes. In this study, a Monte Carlo N-Particle eXtended code is used to calculate the gamma-ray attenuation coefficients and dose rates for a new concrete material composed of MnFe_2O_4 nanoparticles, which is then compared with the theoretical and experimental results obtained for a SiO_2 nanoparticle concrete material. According to the results, the average relative differences between the simulations and the theoretical and experimental results for the linear attenuation coefficient(l) in the SiO_2 nanoparticle materials are 6.4% and 5.5%, respectively. By increasing the SiO_2 content up to 1.5% and the temperature of MnFe_2O_4 up to 673 K, l is increased for all energies. In addition, the photon dose rate decreases up to 9.2% and3.7% for MnFe_2O_4 and SiO_2 for gamma-ray energies of0.511 and 1.274 MeV, respectively. Therefore, it was concluded that the addition of SiO_2 and MnFe_2O_4 nanoparticles to concrete improves its nuclear properties and could lead to it being more useful in radiation shielding.

关键词： Shielding Radiation Concrete Attenuation coefficient Photon dose MCNPX code SiO2 and MnFe2O4 nanoparticles

Enzymatic synthesis, antioxidant ability and oil-water distribution coefficient of troxerutin fatty acid esters

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Grain & Oil Science and Technology 2019年第3期2卷 78-84页

作者： Yongmei Xiao Ming Li Pu Mao Liangru Yang Lingbo Qu School of Chemistry and Chemical Engineering Henan University of TechnologyZhengzhou 450001PR China School of Chemistry and Molecular Engineering Zhengzhou UniversityZhengzhou 450001China

Troxerutin fatty acid esters were prepared using troxerutin and fatty acid vinyl esters as substrates in pyridine through enzymatic route. The structures of as-prepared compounds were identified by FT-TR, NMR, and ESI-HRMS. Using alkaline protease(≥30 mg/mL) as enzyme, maximum yields reached 58% at 3:1(vinyl hexanoate to troxerutin) in pyridine(water content ≤1%). The yields gradually declined as chain length of acyl donors rose. The antioxidation abilities of the as-obtained compounds were confirmed by both DPPH free radical scavenging and potassium ferricyanide reduction methods. The antioxidation ability of troxerutin fatty acid esters was found lower than that of troxerutin. However, the logP values of troxerutin fatty acid esters varied from 0.15 to 1.94, suggesting that troxerutin fatty acid esters had better lipophilicity than troxerutin(logP =-2.12) when compared to their oil-water distribution coefficients. Overall, these findings look promising as reference for further development of future troxerutin.

关键词： Troxerutin Enzymatic synthesis Fatty acid esters Antioxidation Oil-water distribution coefficient

Method for determining the sliding-friction coefficient of the aluminum-zincplated post-treatment plate

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Baosteel Technical Research 2020年第3期14卷 44-48页

作者： ZHANG Xiaota FAN Chun Products&Technique Management Department Baoshan Iron&Steel Co.Ltd.Shanghai 201999China

With reference to the testing standard ASTM D1894,the sliding-friction coefficient of the aluminumzinc-plated post-treatment plate was measured.To reduce the detection error in practical applications,a correction factor is proposed.Although the test results showed that the relative standard deviation of the friction coefficient of the aluminum-zinc-plated post-treatment plate was 12.1%indicating that the test results experienced a certain fluctuation,it can nevertheless be used as an internal factory-controlled test method.At the same time,problems were encountered with respect to sample contact,sample edge burr,and sample surface contamination.However,measures can be taken to reduce the impact of these factors.

关键词： sliding-friction coefficient aluminum-zinc plate post-treatment plate

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