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Automotive Service Quality Investigation Using a Grey-DEMATEL Model

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Computers, Materials & Continua 2022年第12期73卷 4779-4800页

作者： Phi-hung Nguyen Faculty of Business FPT UniversityHanoi100000Vietnam

In today’s fast-challenging business environment,automobile manufacturers are required to supply customers with high-quality vehicles at competitive ***,existing research on factors influencing service quality lacks a detailed and systematic understanding,and there is no consensus study on causal relationship and measuring the weights of service quality factors in the automotive manufacturing *** study provides an integrated technique for evaluating the automotive service quality in the context of VinFast-the Vietnamese leading ***,the Grey Theory System(GTS)is utilized to estimate the subjective views of the decision maker(DM)and overcome incomplete and vague decision ***,a Decision-Making Trial and Evaluation Laboratory approach integrated with GTS(Grey-DEMATEL)is proposed not only to define the cause-effect factors but also to quantify the causal relationship of proposed criteria,which is based on comprehensive analyses of the current service quality literature and experts’opinions,as well as to capture the criteria *** results show that the weights of main criteria can be sorted as follow:Tangibility>Reliability>Assurance>Pricing>Empathy>*** the proposed sub-criteria,Pricing is the top concern compared to other dimensions,making it a prerequisite for *** causal relationships of VinFast’s service quality are discovered by the Grey-DEMATEL *** findings also indicated a rising need for VinFast to focus on ***,the proposed model might be used as a decision support tool to contribute to the literature on service quality,provide recommendations for future study,and assist managers in improving service qualitymore efficiently.

关键词： MCDM grey theory DEMATEL SERVQUAL automobile industry

Two-Stage PLS-SEM and Fuzzy AHP Approach to Investigate Vietnamese SMEs’Export Competitiveness

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Computers, Materials & Continua 2022年第8期72卷 4107-4123页

作者： Phi-hung Nguyen Department of Business Management National Taipei University of TechnologyTaipei10608Taiwan Faculty of Business FPT UniversityHanoi100000Vietnam

Vietnam is paying great to the seafood exporting sector,offering various significant production advantages,concluding that it is critical to understand the competitiveness of the target market and implement effective ***,due to COVID 19,the value of Vietnamese pangasius exports resulted in low and unpredictable profits for pangasius *** is obvious to recognize competitiveness as Multi-Criteria Decision Making(MCDM)problem in the uncertain business ***,this study is the first to propose a two-staged Partial Least Squares-Structural Equation Modeling(PLS-SEM)and Fuzzy Analytic Hierarchy Process(FAHP)analysis to identify potential criteria and comprehensively investigate the competitiveness of Vietnamese pangasius export Small and Medium-sized Enterprises(SMEs)in the context of china ***,a dataset of 186 valid respondents from seafood export SMEs was collected through an online survey from June to December *** PLS-SEM approach was applied to ascertain the positive impact of the proposed criteria contributing to the competitiveness of Vietnamese pangasius against china *** PLS-SEM results showed that all criteria strongly correlated with the pangasius exporting ***,the FAHP method is employed to rank the subjective weights of mentioned criteria based on 12 experts’*** infrastructure(C3)has the highest rank of competitiveness criteria with the highest weight,followed by Product(C4).In contrast,Prices(C6)was indicated as the lowest rank at 0.107 regarding FAHP ***,this study provides insights into stakeholders seeking to improve competitiveness performance.

关键词： PLS-SEM FAHP competitiveness pangasius SMEs MCDM

A NOTE ON SINGULAR INTEGRALS WITH DOMINATING MIXED SMOOTHNESS IN TRIEBEL-LIZORKIN SPACES

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Acta Mathematica Scientia 2014年第4期34卷 1331-1344页

作者： hung Viet LE Faculty of Science and Technology Hoa Sen UniversityQuang Trung Software ParkSection 10Ward Tan Chanh HiepDistrict 12Ho Chi Minh CityViet Nam

Let h, be a measurable function defined on R^＋ ×R^＋. Let Ω ∈ L（log L^＋）^υq （S^n1-1 × S^n2-1）（1≤ υq ≤ 2） be homogeneous of degree zero and satisfy certain cancellation conditions. We show that the singular integral Tf（x1,x2）=p.v.∫∫R^n1＋n2 Ω（y′1,y′2）h（｜y1｜,｜y2｜）/｜y1｜^n1｜y2｜^n2 f（x1-y1,x2-y2）dy1dy2maps from Sp,q^α1,α2F（R^n1×R^n2）boundedly to itself for 1 〈 p, q 〈 ∞, α1, α2 ∈R.

关键词： singular integrals Marcinkiewicz integrals mixed smoothness Triebel-Lizorkin spaces

A Hybrid Grey DEMATEL and PLS-SEM Model to Investigate COVID-19 Vaccination Intention

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Computers, Materials & Continua 2022年第9期72卷 5059-5078页

作者： Phi-hung Nguyen Department of Business Management National Taipei University of TechnologyTaipei10608Taiwan Faculty of Business FPT UniversityHanoi100000Vietnam

The main objective of this study is to comprehensively investigate individuals’vaccination intention against COVID-19 during the second wave of COVID-19 spread in Vietnam using a novel hybrid ***,the Decision-Making Trial and Evaluation Laboratory based on Grey Theory(DEMATEL-G)was employed to explore the critical factors of vaccination intention among ***,Partial Least Squares-Structural Equation Modeling(PLS-SEM)was applied to test the hypotheses of individual behavioral intention to get the vaccine to prevent the outbreak of COVID-19.A panel of 661 valid respondents was collected from June 2021 to July 2021,and confidentiality was maintained for all data *** results identified that perception of COVID-19 vaccination and trust in vaccination strategy directly associated with individuals’COVID-19 ***,the perceived severity of COVID-19 has an indirect impact on COVID-19 vaccination intentions via the perception of the COVID-19 *** findings indicated that the government’s information about vaccines is necessary for the new phase of vaccination intervention strategies in ***,the study suggests that the government needs to give complete information about the role of vaccines prioritizes transparency in official information about COVID-19 vaccines to allay concerns about side effects,allowing for the most appropriate policy formulation and implementation to encourage public *** studies can apply PLS-SEM and other MCDM models with the fuzzy,hesitant numbers to re-evaluate the feasibility,validity and reliability of this research’s proposed model.

关键词： COVID-19 vaccination immunization intervention PLS-SEM DEMATEL grey theory vietnam

Analysis of streamwise conduction in forced convection of microchannels using fin approach

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2011年第9期12卷 655-664页

作者： Suhandran MUNIANDY Yew Mun hung Faculty of Engineering and Technology Multimedia University Infineon Technologies Sdn Bhd Batu Berendam School of Engineering Monash University

The effects induced by streamwise conduction on the thermal characteristics of forced convection for single-phase liquid flow in rectangular microchannel heat sinks under imposed constant wall temperature have been studied. By employing the fin approach in the first law of analysis, models with and without streamwise conduction term in the energy equation were developed for hydrodynamically and thermally fully-developed flow under local thermal non-equilibrium for the solid and fluid phases. These two models were solved to obtain closed form analytical solutions for the fluid and solid temperature distributions and the analysis emphasized details of the variations induced by the streamwise conduction on the fluid temperature distributions. The effects of the Peclet number, aspect ratio, and thermal conductivity ratio on the thermal characteristics of forced convection in microchannel heat sinks were analyzed and discussed. This study reveals the conditions under which the effect of streamwise conduction is significant and should not be neglected in the forced convective heat transfer analysis of microchannel heat sinks.

关键词： Streamwise conduction Fin approach Microchannel heat sink

Exacerbated VEGF up-regulation accompanies diabetes-aggravated hemorrhage in mice after experimental cerebral ischemia and delayed reperfusion

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Neural Regeneration Research 2022年第7期17卷 1566-1575页

作者： Angela Ka Wai Lai Tsz Chung Ng Victor Ka Lok hung Ka cheung Tam chi Wai cheung Sookja Kim Chung Amy cheuk Yin Lo Department of Ophthalmology Li Ka Shing Faculty of MedicineThe University of Hong KongHong Kong Special Administration RegionChina Department of Anesthesiology Laboratory and Clinical Research Institute for PainThe University of Hong KongHong Kong Special Administration RegionChina Macao University of Science and Technology TaipaMacao Special Administration RegionChinaSchool of Biomedical SciencesThe State Key Laboratory of Pharmaceutical BiotechnologyThe University of Hong KongHong Kong Special Administration RegionChina

Reperfusion therapy is the preferred treatment for ischemic stroke,but is hindered by its short treatment window,especially in patients with diabetes whose reperfusion after prolonged ischemia is often accompanied by exacerbated *** mechanisms underlying exacerbated hemorrhage are not fully *** study aimed to identify this mechanism by inducing prolonged 2-hour transient intraluminal middle cerebral artery occlusion in diabetic Ins2Akita/+mice to mimic patients with diabetes undergoing delayed mechanical *** results showed that at as early as 2 hours after reperfusion,Ins2Akita/+mice exhibited rapid development of neurological deficits,increased infarct and hemorrhagic transformation,together with exacerbated down-regulation of tight-junction protein ZO-1 and upregulation of blood-brain barrier-disrupting matrix metallopeptidase 2 and matrix metallopeptidase 9 when compared with normoglycemic Ins2+/+*** indicated that diabetes led to the rapid compromise of vessel integrity immediately after reperfusion,and consequently earlier death and further aggravation of hemorrhagic transformation 22 hours after *** observation was associated with earlier and stronger up-regulation of pro-angiogenic vascular endothelial growth factor(VEGF)and its downstream phospho-Erk1/2 at 2 hours after reperfusion,which was suggestive of premature angiogenesis induced by early VEGF up-regulation,resulting in rapid vessel disintegration in diabetic *** reticulum stress-related pro-apoptotic C/EBP homologous protein was overexpressed in challenged Ins2Akita/+mice,which suggests that the exacerbated VEGF up-regulation may be caused by overwhelming endoplasmic reticulum stress under diabetic *** conclusion,the results mimicked complications in patients with diabetes undergoing delayed mechanical thrombectomy,and diabetes-induced accelerated VEGF up-regulation is likely to underlie exacerbated hemorrhagic transformat

关键词： blood-brain barrier brain injury diabetes mellitus hemorrhagic transformation infarct ischemia/reperfusion injury middle cerebral artery occlusion mouse model stroke vascular endothelial growth factor

Pathogenesis of pandemic H1N1 2009 influenza virusinfection and the implication on management

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Frontiers of Medicine 2010年第2期4卷 147-156页

作者： Kelvin Kai-Wang TO Iris Wai-Sum LI Ivan Fan-Ngai hung Vincent chi-Chung cheNG Kwok-Yung YUEN Carol Yu Center for Infection Department of MicrobiologyThe University of Hong KongHong Kong SARChina

The pandemic H1N12009 inﬂuenza virus has caused theﬁrst inﬂuenza pandemic of the 21st century,leading to disproportionate fatalities in the low-risk population despite the generally mild nature of the *** in science and technology have allowed very detailed study on the pathogenesis of this novel virus,and many have already been published in less than a year after the start of the *** generated from cell lines,animal models,and clinical data analysis has provided us with greater understanding of the behavior of this virus and the associated host *** new knowledge will allow us to formulate scientiﬁcally sound and evidence-based management plans.

关键词： inﬂuenza A virus,H1N1 subtype pandemic pathogenesis virulence factors immunity management,antiviral

Comparison of Layer-stacking and Dempster-Shafer Theory-based Methods Using Sentinel-1 and Sentinel-2 Data Fusion in Urban Land Cover Mapping

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Geo-Spatial Information Science 2022年第3期25卷 425-438页

作者： Dang hung Bui LászlóMucsi Department of Geoinformatics Physical and Environmental GeographyUniversity of SzegedSzegedHungary Institute for Environmental Science Engineering and ManagementIndustrial University of Ho Chi Minh CityHo Chi Minh CityVietnam

Data fusion has shown potential to improve the accuracy of land cover mapping,and selection of the optimal fusion technique remains a *** study investigated the performance of fusing Sentinel-1(S-1)and Sentinel-2(S-2)data,using layer-stacking method at the pixel level and Dempster-Shafer(D-S)theory-based approach at the decision level,for mapping six land cover classes in Thu Dau Mot City,*** the pixel level,S-1 and S-2 bands and their extracted textures and indices were stacked into the different single-sensor and multi-sensor datasets(*** datasets).The datasets were categorized into two *** group included the datasets containing only spectral and backscattering bands,and the other group included the datasets consisting of these bands and their extracted *** random forest(RF)classifier was then applied to the datasets within each *** the decision level,the RF classification outputs of the single-sensor datasets within each group were fused together based on D-S ***,the accuracy of the mapping results at both levels within each group was *** results showed that fusion at the decision level provided the best mapping accuracy compared to the results from other products within each *** highest overall accuracy(OA)and Kappa coefficient of the map using D-S theory were 92.67%and 0.91,*** decision-level fusion helped increase the OA of the map by 0.75%to 2.07%compared to that of corresponding S-2 products in the ***,the data fusion at the pixel level delivered the mapping results,which yielded an OA of 4.88%to 6.58%lower than that of corresponding S-2 products in the groups.

关键词： Land cover mapping data fusion random forest Dempster-Shafer theory optical data radar data pixel level decision level

Performance-Oriented Layout Synthesis for Quantum Computing

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Computer Systems Science & Engineering 2024年第6期48卷 1581-1594页

作者： chi-Chou Kao hung-Yi Lin Department of Computer Science and Information Engineering National University of TainanTainan700301TaiwanChina Department of Electrical Engineering National University of KaohsiungKaohsiung811TaiwanChina

Layout synthesis in quantum computing is crucial due to the physical constraints of quantum devices where quantum bits(qubits)can only interact effectively with their nearest *** constraint severely impacts the design and efficiency of quantum algorithms,as arranging qubits optimally can significantly reduce circuit depth and improve computational *** tackle the layout synthesis challenge,we propose an algorithm based on integer linear programming(ILP).ILP is well-suited for this problem as it can formulate the optimization objective of minimizing circuit depth while adhering to the nearest neighbor interaction *** algorithm aims to generate layouts that maximize qubit connectivity within the given physical constraints of the quantum *** experimental validation,we outline a clear and feasible setup using real quantum *** includes specifying the type and configuration of the quantum hardware used,such as the number of qubits,connectivity constraints,and any technological *** proposed algorithm is implemented on these devices to demonstrate its effectiveness in producing depth-optimal quantum circuit *** integrating these elements,our research aims to provide practical solutions to enhance the efficiency and scalability of quantum computing systems,paving the way for advancements in quantum algorithm design and implementation.

关键词： Quantum computing layout placement and routing scheduling allocation optimality