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Optimization Model for Selecting Temporary Hospital Locations During COVID-19 Pandemic

Computers, Materials & Continua 2022年第1期70卷 397-412页

作者： Chia-Nan Wang Chien-Chang Chou Hsien-Pin Hsu Van Thanh nguyen viet Tinh nguyen Department of Industrial Engineering and Management National Kaohsiung University of Science and TechnologyKaohsiung80778Taiwan Department of Shipping Technology National Kaohsiung University of Science and TechnologyKaohsiung80778Taiwan Department of Supply Chain Management National Kaohsiung University of Science and TechnologyKaohsiung80778Taiwan Faculty of Commerce Van Lang UniversityHo Chi Minh City70000Vietnam

The two main approaches that countries are using to ease the strain on healthcare infrastructure is building temporary hospitals that are specialized in treating COVID-19 patients and promoting preventive *** such,the selection of the optimal location for a temporary hospital and the calculation of the prioritization of preventive measures are two of the most critical decisions during the pandemic,especially in densely populated areas where the risk of transmission of the virus is *** the location selection process or the prioritization of measures is poor,healthcare workers and patients can be harmed,and unnecessary costs may come into *** this study,a decision support framework using a fuzzy analytic hierarchy process(FAHP)and a weighted aggregated sum product assessment model are proposed for selecting the location of a temporary hospital,and a FAHP model is proposed for calculating the prioritization of preventive measures against COVID-19.A case study is performed for Ho Chi Minh City using the proposed decision-making *** contribution of this work is to propose a multiple criteria decision-making model in a fuzzy environment for ranking potential locations for building temporary hospitals during the COVID-19 *** results of the study can be used to assist decisionmakers,such as government authorities and infectious disease experts,in dealing with the current pandemic as well as other diseases in the *** the entire world facing the global pandemic of COVID-19,many scientists have applied research achievements in practice to help decision-makers make accurate decisions to prevent the *** the number of cases increases exponentially,it is crucial that government authorities and infectious disease experts make optimal decisions while considering multiple quantitative and qualitative *** such,the proposed approach can also be applied to support complex decision-making processes in a fuzzy environment in di

关键词： COVID-19 WHO MCDM preventive measures fuzzy theory FAHP WASPAS

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How to"pick up"colorectal serrated lesions and polyps in daily histopathology practice:From terminologies to diagnostic pitfalls

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World Journal of Clinical Oncology 2024年第9期15卷 1157-1167页

作者： Thai H Tran Vinh H nguyen Diem TN Vo Department of Pathology Da Nang HospitalDa Nang 50000Viet Nam Department of Pathology University Medical Center Ho Chi Minh CityHo Chi Minh 70000Viet Nam Department of Histology-Embryology and Pathology University of Medicine and Pharmacy at Ho Chi Minh CityHo Chi Minh 70000Viet Nam

Over the last decade,our knowledge of colorectal serrated polyps and lesions has significantly improved due to numerous studies on this group of precursor *** lesions were misleading as benign before 2010,but they are currently reclassified as precancerous lesions that contribute to 30%of colorectal cancer through the serrated neoplasia *** World Health Organization updated the classification for serrated lesions and polyps of the colon and rectum in 2019,which is more concise and applicable in daily *** responsible authors prescribe that“colorectal serrated lesions and polyps are characterized by a serrated(sawtooth or stellate)architecture of the epithelium.”From a clinical standpoint,sessile serrated lesion(SSL)and SSL with dysplasia(SSLD)are the two most significant *** these advancements,the precise diagnosis of SSL and SSLD based mainly on histopathology remains challenging due to various *** review describes the nomenclature and the terminology of colorectal serrated polyps and lesions and highlights the diagnostic criteria and obstacles encountered in the histopathological diagnosis of SSL and SSLD.

关键词： Sessile serrated lesions Sessile serrated lesions with dysplasia Serrated polyps Sessile serrated adenoma Benign hyperplastic polyps Serrated lesions/polyps

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Cr/nanodiamond composite plating with cobalt cation additive

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中国有色金属学会会刊：英文版 2009年第4期19卷 975-978页

作者： viet-Hue nguyen Thi-Nam HOANG Ngoc-Phong nguyen Sik-Chol KWON Man KIM Joo-Yul LEE Institute of Materials Science Korea Institute of Materials Science

The effect of cationic additive on Cr/nanodiamond plating was *** plating was performed in Sargent *** of deposit was observed by scanning electron microscope(SEM);microhardness by hardness tester;wear rate by tribometer;amount of diamond in deposit by combustion method and passivity by potentiodynamic *** results show that in the presence of cobalt cation,the amount of nanodiamond particle in the deposit is *** increasing diamond particle amount,the metallurgical,mechanical and electrochemical properties of Cr/nanodiamond deposit are ***,this improvement seems to be *** the presence of 10 g/L of nanodiamond powder and 2.5 g/L of cobalt cation in the bath,the amount of diamond particle in deposit is increased by 4 times;and wear rate of Cr-Co/nanodiamond deposit is decreased by 2-3 times as compared with pure Cr/*** passive current of Cr-Co/nanodiamond composite deposit is decreased from 18 to 8 μ*** morphology of Cr/nanodiamond is smooth remarkably in the presence of cobalt cation.

关键词：纳米金刚石粉复合镀层钴离子镀铬添加剂金刚石颗粒扫描电子显微镜形态观察

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Optimization Model in Manufacturing Scheduling for the Garment Industry

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Computers, Materials & Continua 2022年第6期71卷 5875-5889页

作者： Chia-Nan Wang Yu-Chen Wei Po-Yuk So viet Tinh nguyen Phan nguyen Ky Phuc Department of Industrial Engineering and Management National Kaohsiung University of Science and TechnologyKaohsiung80778Taiwan Department of Money and Banking National Kaohsiung University of Science and TechnologyKaohsiung80778Taiwan Ph.D.Program in Finance and Banking National Kaohsiung University of Science and TechnologyKaohsiung80778Taiwan Faculty of Commerce Van Lang UniversityHo Chi Minh CityVietnam Faculty of Industrial Engineering and Management International UniversityHo Chi Minh City70000Vietnam

The garment industry in vietnam is one of the country’s strongest industries in the ***,the production process still encounters problems regarding scheduling that does not equate to an optimal *** paper introduces a production scheduling solution that resolves the potential delays and lateness that hinders the production process using integer programming and order allocation with a make-to-order manufacturing viewpoint.A number of constraints were considered in the model and is applied to a real case study of a factory in order to viewhowthe tardiness and latenesswould be affected which resulted in optimizing the scheduling time ***,the constraints considered were order assignments,production time,and tardiness with an objective function which is to minimize the total cost of *** results of the study precisely the overall cost of delay of the orders given to the plant and successfully propose a suitable production schedule that utilizes the most of the plant *** study has shown promising results that would assist plant and production managers in determining an algorithm that they can apply for their production process.

关键词： Production scheduling problem order allocation integer programming make-to-order manufacturing apparel industry

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A combination of damage locating vector method （DLV） and differential evolution algorithm （DE） for structural damage assessment

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Frontiers of Structural and Civil Engineering 2018年第1期12卷 92-108页

作者： T. nguyen-THOI A. TRAN-viet N. nguyen-MINH T. VO-DUY V. HO-HUU Division of Computational Mathematics and Engineering Institute for Computational Science Ton Duc Thang University Hochiminh City Vietnam Division of Construction Computation Institute for Computational Science Ton Duc Thang University Hochiminh City Vietnam Faculty of Civil Engineering Ton Duc Thang University Hochiminh City Vietnam

In this study, a two-stage method is presented for identifying multiple damage scenarios. In the first stage, the damage locating vector （DLV） method using normalized cumulative energy （nce） is employed for damage localization in structures. In the second stage, the differential evolution algorithm （DE） is used for damage severity of the structures. In addition, in the second stage, a modification of an available objective function is made for handing the issue of symmetric structures. To verify the effectiveness of the present technique, numerical examples of a 72-bar space truss and a one-span steel portal frame are considered. In addition, the effect of noise on the performance of the identification results is also investigated. The numerical results show that the proposed combination gives good assessment of damage location and extent for multiple structural damage cases.

关键词： damage assessment damage locating vector method (DLV) differential evolution (DE) multiple damagelocation assurance criterion (MDLAC) mode shape error function

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Intelligent Tunicate Swarm-Optimization-Algorithm-Based Lightweight Security Mechanism in Internet of Health Things

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Computers, Materials & Continua 2021年第1期66卷 551-562页

作者： Gia Nhu nguyen Nin Ho Le viet Gyanendra Prasad Joshi Bhanu Shrestha Faculty of Information Technology Duy Tan UniversityDa Nang550000Vietnam Graduate School Duy Tan UniversityDa Nang550000Vietnam Department of Computer Science and Engineering Sejong UniversitySeoul05006South Korea Department of Electronic Engineering Kwangwoon UniversitySeoul01897South Korea

Fog computing in the Internet of Health Things(IoHT)is promising owing to the increasing need for energy-and latency-optimized health sector ***,clinical data(particularly,medical image data)are a delicate,highly protected resource that should be utilized in an effective and responsible manner to fulfil consumer ***,we propose an energy-efficient fog-based IoHT with a tunicate swarm-optimization-(TSO)-based lightweight Simon cipher to enhance the energy efficiency at the fog layer and the security of data stored at the cloud *** proposed Simon cipher uses the TSO algorithm to select the optimal keys that will minimize the deterioration of quality between the original and reconstructed(decrypted)*** this study,the decrypted image quality is preserved by the peak signal-to-noise ratio(PSNR)such that consumers can generate precise medical reports from IoHT devices at the application ***,a lightweight encryption step is implemented in the fog to improve energy efficiency and reduce additional computations at the cloud *** results indicate that the TSO-Simon model achieved a high PSNR of 61.37 dB and a pixel change rate of 95.31.

关键词： Internet of Health Things healthcare Simon cipher tunicate swarm optimization

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On Huppert＇s Conjecture for Alternating Groups of Low Degrees

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Algebra Colloquium 2015年第2期22卷 293-308页

作者： Hung Ngoc nguyen Hung P. Tong-viet Thomas P. Wakefield Department of Mathematics The University of Akron Akron Ohio 44325 USA School of Mathematical Sciences. North-West University (Mafikeng Campus) Mmabatho 2735 South Africa Department of Mathematics and Statistics Youngstown State University One University Plaza Youngstown Ohio 44555 USA

Bertram Huppert conjectured in the late 1990s that the nonabelian simple groups are determined up to an abelian direct factor by the set of their character degrees. Although the conjecture has been established for various simple groups of Lie type and simple sporadic groups, it is expected to be difficult for alternating groups. In [5], Hup- pert verified the conjecture for the simple alternating groups AN of degree up to 11. In this paper, we continue his work and verify the conjecture for the alternating groups of degrees 12 and 13.

关键词： alternating groups character degrees

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Scale and scope economies in small household rice farming in vietnam

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Journal of Integrative Agriculture 2021年第12期20卷 3339-3351页

作者： viet-Ngu HOANG Trung Thanh nguyen Clevo WILSON Thong Quoc HO Uttam KHANAL School of Economics and Finance Queensland University of TechnologyBrisbaneQLD 4000Australia Institute for Environmental Economics and World Trade Leibniz University HannoverHannover 30167Germany University of Economics Ho Chi Minh City Ho Chi Minh City 72516Vietnam Agriculture Victoria Department of JobsPrecincts and RegionsHorshamVIC 3400Australia

The vietnamese agricultural sector has experienced a dramatic structural change based on increased specialization in rice ***,small-scale rice-farmers have continued to grow multiple crops,especially in less developed *** the literature advocates crop diversification for reasons of both economic and ecological sustainability,there lacks empirical evidence as to whether crop diversification brings efficiency and productivity gains to small *** present study is the first applications of the input-oriented stochastic distance function approach in estimating scale and scope economies using data of multi-crop farming households in *** find strong evidence of product-specific economies of *** economies are also present for rice,vegetable,and other annual crop *** suggests that crop diversification enhances efficiency and ***,there still exists significant technical inefficiency in crop production,indicating opportunities to expand farm output at the existing level of inputs and *** specifically,our empirical results indicate that it is desirable to expand vegetable and other annual crop production in mountainous areas while rice cultivation can be further expanded in delta and coastal regions.

关键词： input distance function stochastic frontier economies of scope economies of scale product-specific

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Sustainable Supplier Selection Model in Supply Chains During the COVID-19 Pandemic

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Computers, Materials & Continua 2022年第2期70卷 3005-3019页

作者： Chia-Nan Wang Chao-Fen Pan viet Tinh nguyen Syed Tam Husain Department of Industrial Engineering and Management National Kaohsiung University of Science and TechnologyKaohsiung80778Taiwan Faculty of Commerce Van Lang UniversityHo Chi Minh City70000Vietnam

As global supply chains become more developed and complicated,supplier quality has become increasingly influential on the competitiveness of businesses during the Covid-19 ***,supplier selection is an increasingly important process for any business around the *** a supplier is a complex decision that can result in lower procurement costs and increased profits without increasing the cost or lowering the quality of the ***,these decision-making problems can be complicated in caseswithmultiple potential ***’s textile and garment industry,for example,has made rapid progress in recent years but is still facing great difficulties as the supply of raw materials and machinery depends heavily on foreign ***,it is extremely important for textile and garment manufacturing companies in vietnam to implement an effective supplier evaluation and selection *** multicriteria decision-making models are frequently employed to assist with supplier evaluation and selection problems,few of these models consider the problem under the condition of a fuzzy decision-making *** aim of this paper is to create a hybrid MCDM model using the Fuzzy Analytical Hierarchy Process(FAHP)model and the Technique for Order of Preference by Similarity to Ideal Solution(TOPSIS)to assist the supplier selection process in the garment industry in a fuzzy decision-making *** this study,the FAHP method is used to evaluate the performance and the weight of each *** is then used to rank all potential *** proposed model is then applied to a real-world case study to demonstrate both the process of calculation as well as its real-world *** results from the case study provide empirical evidence that the model is *** proposed approach can also be used in combination with other MCDM models to better support decision makers and can be modified to be applied in similar suppl

关键词： MCDM model FAHP fuzzy theory TOPSIS garment industry covid-19

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A Model for Selecting a Biomass Furnace Supplier Based on Qualitative and Quantitative Factors

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Computers, Materials & Continua 2021年第11期69卷 2339-2353页

作者： Chia-Nan Wang Hsin-Pin Fu Hsien-Pin Hsu Van Thanh nguyen viet Tinh nguyen Ansari Saleh Ahmar Department of Industrial Engineering and Management National Kaohsiung University of Science and TechnologyKaohsiung80778Taiwan Department of Marketing and Distribution Management National Kaohsiung University of Science and TechnologyKaohsiung80778Taiwan Department of Supply Chain Management National Kaohsiung University of Science and TechnologyKaohsiung80778Taiwan Faculty of Commerce Van Lang UniversityHo Chi Minh City70000Vietnam Faculty Department of Statistics Faculty of Mathematics and Natural SciencesUniversitas Negeri MakassarMakassar90223Indonesia

In developing countries,solar energy is the largest source of energy,accounting for 35%–45%of the total energy *** energy resource plays a vital role in meeting the energy needs of the world,especially in *** has favorable natural conditions for this energy *** it is hot and humid,and it has much rainfall and fertile soil,biomass develops very ***,byproducts from agriculture and forestry are abundant and continuously ***,byproducts that are considered natural waste have become the cause of environmental pollution;these include burning forests,straw,and sawdust in the North;and rice husks dumped into rivers and canals in the Mekong Delta *** energy is provided in a short cycle,is environmentally safe to use and is encouraged by organizations that support sustainable *** advantage of this energy source provides energy for economic development and ensures environmental *** to the abovementioned favorable conditions,many biomass energy plants are being built in *** other renewable energy investment projects,the selection of the construction contractor,the selection of equipment for the installation of the power plant,and the choice of construction site are complex multi-criteria *** this case,decisionmakers must evaluate many qualitative and quantitative *** factors interact with each other and it is difficult to use personal experience to choose the optimal solution for such complex decision-making problems,especially in a fuzzy decision-making ***,in this study,the authors use a Multi-Criteria Decision-Making(MCDM)model that uses a Fuzzy Analytic Hierarchy Process(FAHP)model and the Combined Compromise Solution(CoCoSo)algorithm to select biomass furnace suppliers utilizing both qualitative and quantitative ***,the results of this work will provide the first look at a hybrid CoCoSo/FAHP method that decision-m

关键词： Biomass energy supplier selection biomass furnace MCDM optimization CoCoSo algorithm fuzzy theory FAHP model industry 4.0

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