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Invariant Lighting Hand Posture Classification

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Invariant Lighting Hand Posture Classification

Fuzzy MCDM Model for Selection of Infectious Waste Management Contractors

The 2010 IEEE International Conference on Progress in Informatics and Computing

作者： Thi-thanh-Hai Tran Thi-thanh-Mai Nguyen MICA International Research Center Hanoi University of Science and Technology VietNam

ISBN: (纸本)9781424467860

＜正＞Hand posture classification is a key problem for many human computer interaction ***,this is not a simple *** this paper,we propose to decompose the hand posture classification problem into 2 *** the first step,we detect skin regions using a very fast algorithm of color segmentation based on thresholding *** segmentation is robust to lighting condition thank to a step of color normalization using neural *** the second step, each skin region will be classified into one of hand posture class using Cascaded Adaboost *** contributions of this paper are:（i） By applying a step of color normalization,the posture classification rate is significantly improved under varying lighting condition;（ii） The cascaded Adaboost technique has been studied for the problem of face detection（2 classes）.In this paper, it will be studied and evaluated in more detail in a problem of classification of hand postures（multi-classes）.

关键词： Hand posture classification Cascaced Adaboost Color normalization Neural network Lighting invariance

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Computers, Materials & Continua 2022年第8期72卷 2191-2202页

作者： Nguyen Van thanh Nguyen Hoang Hai Nguyen Thi Kim Lan Faculty of Commerce Van Lang UniversityHo Chi Minh CityVietnam International Education Institute Van Lang UniversityHo Chi Minh CityVietnam

Healthcare supply chains are under pressure to drive down costs because of digital business,shifting customer needs and new *** waste generated from medical facilities includes medical activities and daily-life activities of patients and their family *** to statistics of the Department of Health EnvironmentalManagement,Vietnam currently has more than 13,500 medical facilities,including hospitals from central to provincial and district levels and private hospitals and medical *** medicine generates about 590 tons of medical waste/day and is estimated to be about 800 tons/*** waste includes ordinary medical waste and hazardous medical waste;in which ordinary medical waste accounts for about 80%–90%,only about 10%–20%is hazardous medical waste including infectious waste and non-infectious hazardous *** is an environmental and occupational health issue that needs attention in developing countries like *** large amounts of medical waste to ensure environmental and personal hygiene,doing so inefficiently creates potential hazards to the environment and increases operating ***,hospitals lack objective criteria and methods to evaluate and select the most optimal infectious medical waste,relying instead on their own subjective assessment and prior ***,the author proposed a fuzzy multicriteria decision making(MCDM)model including Fuzzy Analytic hierarchy process(FAHP)and the Weighted Aggregated Sum-Product Assessment(WASPAS)for infectious medical waste contractors’selection in this *** proposed Fuzzy MCDM method is in-tended to provide a more efficient,accurate method in the selection of infectious medical waste contractors than subjective assessment methods,thus reduce potential risks to *** results of this study can be applied to evaluate and select contractors in other industries.

关键词： MCDM model fuzzy theory fuzzy AHP WASPAS medical waste contractors

Fuzzy Multi-Criteria Decision Making for Solar Power Plant Location Selection

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Computers, Materials & Continua 2022年第9期72卷 4853-4865页

作者： Thai Hoang Tuyet Nhi Chia-Nan Wang Nguyen Van thanh Department of Industrial Engineering National Kaohsiung University of Science and Technology80778Taiwan Faculty of Commerce Van Lang UniversityHo Chi Minh CityVietnam

Vietnam is one of Southeast Asian countries with a rapid GDP growth rate,ranging from 6.5%to 7%annually,leading to an average increase in energy demand of 11%per *** demand creates many new opportunities in the energy industry,especially renewable energy,to ensure sustainable development in the future for the country with applications of solar energy growing at the present,and other opportunities to expand in the *** Vietnam,thanks to favorable weather,climate,terrain characteristics and many preferential support policies,there are many great opportunities in the field of solar energy exploitation and *** selection is an important problem in all renewable energy ***,the author proposed a fuzzy Multi-criteria Decision-Making Model(MCDM)model for solar power plant location selection in this study,and as a result,location 5 is the optimal *** contribution of this study is to propose a MCDM for solar power plant location selection in Vietnam under fuzzy environmental conditions.

关键词： Solar power multi-decision topsis fanp fuzzy theory

An IoT-Cloud Based Intelligent Computer-Aided Diagnosis of Diabetic Retinopathy Stage Classification Using Deep learning Approach

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Computers, Materials & Continua 2021年第2期66卷 1665-1680页

作者： K.Shankar Eswaran Perumal Mohamed Elhoseny Phong thanh Nguyen Department of Computer Applications Alagappa UniversityKaraikudi630001India Faculty of Computers and Information Mansoura UniversityMansoura35516Egypt Department of Project Management Ho Chi Minh City Open UniversityHo Chi Minh City7000000Vietnam

Diabetic retinopathy(DR)is a disease with an increasing prevalence and the major reason for blindness among working-age *** possibility of severe vision loss can be extensively reduced by timely diagnosis and *** automated screening for DR has been identified as an effective method for early DR detection,which can decrease the workload associated to manual grading as well as save diagnosis costs and *** studies have been carried out to develop automated detection and classification models for *** paper presents a new IoT and cloud-based deep learning for healthcare diagnosis of Diabetic Retinopathy(DR).The proposed model incorporates different processes namely data collection,preprocessing,segmentation,feature extraction and *** first,the IoT-based data collection process takes place where the patient wears a head mounted camera to capture the retinal fundus image and send to cloud ***,the contrast level of the input DR image gets increased in the preprocessing stage using Contrast Limited Adaptive Histogram Equalization(CLAHE)***,the preprocessed image is segmented using Adaptive Spatial Kernel distance measure-based Fuzzy C-Means clustering(ASKFCM)***,deep Convolution Neural Network(CNN)based Inception v4 model is applied as a feature extractor and the resulting feature vectors undergo classification in line with the Gaussian Naive Bayes(GNB)*** proposed model was tested using a benchmark DR MESSIDOR image dataset and the obtained results showcased superior performance of the proposed model over other such models compared in the study.

关键词： Deep learning classification GaussianNaive Bayes feature extraction diabetic retinopathy

Hidden attractors in a new fractional-order discrete system: Chaos, complexity, entropy, and control

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Chinese Physics B 2020年第5期29卷 174-181页

作者： Adel Ouannas Amina Aicha Khennaoui Shaher Momani Viet-thanh Pham Reyad El-Khazali Laboratory of Mathematics Informatics and Systems(LAMIS)University of Laarbi TebessiTebessa12002Algeria College of Humanities and Sciences Ajman UniversityAjmanUAE Laboratory of Dynamical Systems and Control University of Larbi Ben M’hidiOum El BouaghiAlgeria Department of Mathematics Faculty of ScienceUniversity of JordanAmman 11942Jordan Nonlinear Systems and Applications Faculty of Electrical and Electronics EngineeringTon Duc Thang UniversityHo Chi Minh CityVietnam ECCE Department Khalifa UniversityAbu-Dhabi 127788United Arab Emirates

This paper studies the dynamics of a new fractional-order discrete system based on the Caputo-like difference *** is the first study to explore a three-dimensional fractional-order discrete chaotic system without *** phase portrait,bifurcation diagrams,and largest Lyapunov exponents,it is shown that the proposed fractional-order discrete system exhibits a range of different dynamical ***,different tests are used to confirm the existence of chaos,such as 0-1 test and C0 *** addition,the quantification of the level of chaos in the new fractional-order discrete system is measured by the approximate entropy ***,based on the fractional linearization method,a one-dimensional controller to stabilize the new system is *** results are presented to validate the findings of the paper.

关键词： discrete chaos discrete fractional calculus hidden attractor

Supplier Selection Fuzzy Model in Supply Chain Management:Vietnamese Cafe Industry Case

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Computers, Materials & Continua 2022年第8期72卷 2291-2304页

作者： Chia-Nan Wang Hoang Tuyet Nhi Thai Nguyen Van thanh Department of Industrial Engineering and Management National Kaohsiung University of Science and Technology80778Taiwan Faculty of Commerce Van Lang UniversityHo Chi Minh CityVietnam

Supplier selection is a vital part of the supply chain and is also a current issue that concerns businesses today as supplier quality directly affects the operations of the *** the right supplier can help businesses increase productivity,competitiveness in the market,and profits without having to lower the quality of the ***,choosing a supplier is not a simple matter,it requires businesses to consider many aspects about their ***,the goal of this study is to propose an integrated model consisting of two models:Fuzzy Analytics Network Process(Fuzzy-ANP)model and Weighted Aggregated Sum Product Assessment(WASPAS)to solve the problem *** Fuzzy-ANP model was developed to evaluate the weightings of the supplier selection criteria,and the WASPAS Model was used to rank the *** example of supplier selection in the coffee industry in Vietnam was studied to validate the model,namely 5 main criteria,with 16 sub-criteria,and 7 *** model test results show that the Fuzzy ANP and WASPAS integration model was *** future,these developing models can apply to other industries or integrate with other models.

关键词： Fuzzy-ANP WASPAS multi-decision caféindustry supplier selection supply chain management

Analysis of motorcycle microscopic characteristics at roundabouts under mixed traffic condition:A case study of Vietnam

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Journal of Traffic and Transportation Engineering(English Edition) 2021年第4期8卷 605-619页

作者： Linh thanh Trinh Kazushi Sano Kiichiro Hatoyama Chathura Kovida De Silva Urban Transport Engineering and Planning Laboratory Department of Civil and Environmental EngineeringNagaoka University of TechnologyNiigata 940-2188Japan

Recently,the demand for comprehension of mixed traffic in developing countries,particularly at roundabouts,which are highly interactive road junctions,has ***,we analyzed mixed traffic at roundabouts,considering Vietnam as a case *** two main objectives of this study were to characterize the mixed traffic in Vietnam and to determine the microscopic characteristics of motorcycles at ***,efforts were made to clarify the two constitutions of mixed traffic(the performance rule and the presence of small-sized vehicles),and the term“motorcycle-oriented mixed traffic”was *** when satisfying the two fundamental constitutions,this traffic state has unique features,e.g.,only one type of non-lane-based vehicle(the motorcycle)and the predominance of motorcycles in the traffic composition(91.7%).Second,four microscopic characteristics of motorcycles were obtained from a large dataset:the motorcycles’continuous changes in speed,the relationship between the turning angle rate and the speed,the critical gap,and the following *** relationship between the turning angle rate and the speed was first formulated as a power *** critical gap of motorcycles was estimated as a small value(1.25 s)in the case *** following spaces varied with respect to the speed and had an oval *** smallest lateral and longitudinal dimensions were 1.5 and 1.74 m,*** all the findings are meaningful,they are restricted to the case study(Ho Chi Minh City,Vietnam).

关键词： Mixed traffic Microscopic traffic characteristics Roundabout Turning angle rate Critical gap Following space

Carboxymethyl starch cross-linked by electron beam radiation in presence of acrylic acid sensitizer

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Nuclear Science and Techniques 2013年第B12期24卷 19-22页

作者： Doan Binh Nguyen thanh Duoc Pham Thi Thu Hong R & D Center for Radiation Technology Vietnam Atomic Energy Institute 202A St. 11 Linh Xuan Ward Thu Duc District Ho Chi Minh City Vietnam

Carboxymethyl starch (CMS) can be cross-linked by electron beam radiation to form a biocompatible and environment-friendly hydrogel at a high absorbed dose and a condensed CMS concentration. Acrylic acid (AAc) can be used as a sensitizer in order to reduce the absorbed doses to an acceptable certain level. At an absorbed dose of 3?4 kGy, the gel content of crosslinked CMS can be obtained about 50% with 5% (w/w) AAc concentration used. The compressive strength of CMS samples increased with increasing their cross-linked densities due to raising absorbed doses. The swelling ratio of cross-linked CMS was also attainable at a maximum of 50 times in the distilled water. The enzymatic degradation of cross-linked CMS was carried out in acetate buffer pH 4.6 with 0.1% α-amylase enzymatic solution incubated at 40oC for 6 h. The crosslinked CMS samples were degraded slower than uncrosslinked CMS ones. The results indicated that the highly cross-linked CMS was almost fully degradable when the enzymatic hydrolysis was performed during 6 h. The FT IR spectra of cross-linked CMS in the presence of AAc were examined to observe the carboxyl group of AAc in the structure of cross-linked CMS. The hydrophilic of cross-linked CMS surface was determined by a contact-angle analysis.

关键词：交联密度羧甲基淀粉电子束辐射丙烯酸敏化剂 FT-IR光谱吸收剂量 CMS

An Empirical Exploration of the Capabilities of People with Disabilities in Coping with Disasters

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International Journal of Disaster Risk Science 2020年第5期11卷 602-614页

作者： Khanh That Ton JC Gaillard Carole Adamson Caglar Akgungor Ha thanh Ho School of Environment The University of AucklandAuckland 1010New Zealand Unit for Environmental Sciences and Management North-West UniversityPotchefstroomSouth Africa School of Counselling.Human Services and Social Work The University of AucklandAuckland 1010New Zealand Resilience Advisors Network Dublin 4 D04 ED73Ireland Centre for Climate Change Study in Central Vietnam Hue University of Agriculture and ForestryHue CityVietnam

While the capability approach is increasingly being adopted for evaluating well-being and social justice in the field of human development,this approach in disaster research has remained *** research thus seeks to address the disaster risk that humans face through a lens of capabilities,with a focus on the lives of people with disabilities.A multi-case study approach was adopted and two rural communes in Vietnam were selected as study con *** were collected using focus group discussions and interviews that involved people with disabilities,parents/caregivers of people with intellectual/psychosocial disabilities,and representatives from related *** was found that people with disabilities are affected by disasters due to the lack of capabilities that they value in coping with disasters.A range of capabilities that people with disabilities value was revealed in the study sites,with many being valued not only in times of disasters but also in daily *** findings also highlight that,to actualize their valued capabilities,people with disabilities need access not only to resources but also to the factors that enable them to convert the resources to their valued *** most cases,the limitations to the achievement of capabilities are related to the external environment.

关键词： Capability approach Disasters People with disabilities Vietnam Vulnerability