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A New Job Shop Heurist.c Algorit.m for Machine Scheduling Problems

Journal of Applied Mat.emat.cs and Physics 2017年第11期5卷 2172-2182页

作者： Maryam Ehsaei Duc t. nguyen Civil and Environment.l Engineering Depart.ent Old Dominion University Norfolk VA USA Civil and Environment.l Engineering (CEE) and Modeling Simulation and Visualization Engineering (MSVE) Departments Old Dominion University Norfolk VA USA

t.e purpose of t.is research is t. present.a st.aight.orward and relat.vely efficient.met.od for solving scheduling problems. A new heurist.c algorit.m, wit. t.e object.ve of minimizing t.e makespan, is developed and present.d in t.is paper for job shop scheduling problems (JSP). t.is met.od det.rmines jobs’ orders for each machine. t.e assessment.is based on t.e combinat.on of dispat.hing rules e.g. t.e “Short.st.Processing t.me” of each operat.on, t.e “Earliest.Due Dat.” of each job, t.e “Least.t.rdiness” of t.e operat.ons in each sequence and t.e “First.come First.Serve” idea. Also, unlike most.of t.e heurist.c algorit.ms, due dat. for each job, prescribed by t.e user, is considered in finding t.e opt.mum schedule. A mult.t.de of JSP problems wit. different.feat.res are scheduled based on t.is proposed algorit.m. t.e models are also solved wit. Shift.ng Bot.leneck algorit.m, known as one of t.e most.common and reliable heurist.c met.ods. t.e result.of comparison bet.een t.e out.omes shows t.at.when t.e number of jobs are less t.an or equal t. t.e number of machines, t.e proposed algorit.m concludes smaller, and bet.er, makespan in a significant.y lower comput.t.onal t.me, which shows t.e superiorit. of t.e suggest.d algorit.m. In addit.on, for a cat.gory when t.e number of jobs are great.r t.an t.e number of machines, t.e suggest.d algorit.m generat.s more efficient.result. when t.e rat.o of t.e number of jobs t. t.e number of machines is less t.an 2.1. However, in t.is cat.gory for t.e ment.oned rat.o t. be higher t.an 2.1, t.e smaller makespan could be generat.d by eit.er of t.e met.ods, and t.e result. do not.follow any part.cular t.end, hence, no general conclusions can be made for t.is case.

关键词： Heurist.c Algorit.m Job Shop Scheduling Shift.ng Bot.leneck Makespan

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A new formula for screening met.bolic syndrome in Asians:skin fold t.ickness at.A8 point.on Erdheim diagram and waist.circumference

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Journal of Geriat.ic Cardiology 2007年第1期4卷 32-41页

作者： t.an C nguyen t.ai Q Ngo Khoa t. Pham Son V nguyen Hieu t.Luong Cong D nguyen Viet.am Milit.ry Medical Universit. Ha Dong Town Ha Tay Province Vietnam Depart.ent.of Cardiology Hospital 103 Vietnam

Background and object.ves Recent.st.dies have shown t.at.abdominal obesit. is an import.nt.component.for t.e diagnosis of met.bolic syndrome (MS) and MS is a high risk fact.r for cardiovascular disease and diabet.s mellit.s. t.e aim of t.is st.dy was t. develop a new formula for screening and diagnosis of MS using t.e waist.circumference (WC) and skin fold t.ickness at.t.e point.A8 (SFA8) on t.e Erdheim diagram. Met.ods A t.t.l of 358 essent.al hypert.nsive pat.ent. (189 male and 169 female) wit. a mean age of 59.0±9.7 years were included; 151 healt.y people (79 male, 72 female) wit. a mean age of 57.3±12.1 years (similar t. hypert.nsive pat.ent.) who were non-hypert.nsive and non-diabet.c served as a cont.ol group. All subject. had no evidence of hepat.c, renal, or endocrine disease as det.rmined by hist.ry, physical examinat.on and screening blood t.st.. Height. weight. WC, SFA8, blood pressure (BP), fast.ng plasma glucose, HDL-cholest.rol and t.iglyceride levels were measured in all subject.. Abdominal obesit. measured by WC using t.e Asia-Pacific crit.ria (IDFA) was applied for meet.ng t.e MS definit.on. t.e normal value of SFA8 was measured in t.e non- MS group. Relat.onships bet.een SFA8 and syst.lic BP, diast.lic BP, fast.ng plasma glucose, HDL-cholest.rol and t.iglyceride levels were calculat.d in t.e cont.ol group. A new formula was developed according t. high SFA8 and high WC. Result. t.e normal value of SFA8 in non-MS group was 23.6±7.2 mm in male and 26.5±4.6 mm in female, respect.vely. t.e value of SFA8 in MS group was 36.7± 7.4 mm in male and 38.9 ± 8.1 mm in female, respect.vely. t.e value of WC in MS group and non-MS group were 92.5±3.0 cm and 79.4±6. 1 cm in male and 86.3±6.4 cm and 74.7±5.4 cm in female, respect.vely. t.ere was a correlat.on bet.een SFA8 and syst.lic BP, diast.lic BP, fast.ng plasma glucose, HDL-cholest.rol and t.iglyceride in cont.ol group (t.e correlat.on coefficient. were 0.29, 0.23, 0.25, -0.31 and 0.46, respect.vely, P < 0.01)

关键词： waist circumference skin fold t.ickness met.bolic syndrome

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Mat.emat.cal modeling and numerical comput.t.on of t.e effect.ve int.rfacial condit.ons for St.kes flow on an arbit.arily rough solid surface

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Applied Mat.emat.cs and Mechanics(English Edit.on) 2021年第5期42卷 721-746页

作者： A.t.t.AN H.LE QUANG Q.C.HE D.H.nguyen Research and Applicat.on Cent.r for t.chnology in Civil Engineering University of Transport and CommunicationsHanoi 10000Vietnam Laborat.ire Modelisat.on et.Simulat.on Mult.-Echelle Unite Mixte de Recherche 8208Centre National de la Recherche ScientifiqueUniversite Gustave EiffelMarne-la-Vallee F-77454France School of Mechanical Engineering Southwest Jiaotong UniversityChengdu 610031China

t.e present.work is concerned wit. a t.o-dimensional(2D)St.kes flow t.rough a channel bounded by t.o parallel solid *** dist.nce bet.een t.e walls may be arbit.ary,and t.e surface of one of t.e walls can be arbit.arily *** main object.ve of t.is work consist. in homogenizing t.e het.rogeneous int.rface bet.een t.e rough wall and fluid so as t. obt.in an equivalent.smoot. slippery fluid/solid int.rface charact.rized by an effect.ve slip *** solve t.e corresponding problem,t.o efficient.numerical approaches are elaborat.d on t.e basis of t.e met.od of fundament.l solut.on(MFS)and t.e boundary element.met.ods(BEMs).t.ey are applied t. different.cases where t.e fluid/solid int.rface is periodically or randomly *** result. obt.ined by t.e proposed t.o met.ods are compared wit. t.ose given by t.e finit. element.met.od and some relevant.ones report.d in t.e *** comparison shows t.at.t.e t.o proposed met.ods are part.cularly efficient.and accurat..

关键词： effect.ve slip lengt. met.od of fundament.l solut.on(MFS) boundary element.met.od(BEM) St.keslet micro-channel fluid/solid int.rface

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Skin fold t.ickness at.abdomen:a simple ant.ropomet.ic measurement.may compliment.met.bolic syndrome definit.on in pat.ent. wit. normal waist.circumference

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Journal of Geriat.ic Cardiology 2006年第2期3卷 85-92页

作者： t.an C nguyen t.ai Q Ngo Son V nguyen Hieu t.Luong Khoa t. Pham Cong D nguyen Viet.am Milit.ry Medical Universit. Ha ToyVietnam

Backgroud and Object.ves Previous st.dies have report.d t.at.skin fold t.ickness (SF) st.ongly correlat.d wit. insulin resist.nce in t.e met.bolic syndrome (Met.). In t.is st.dy, we developed a Met. definit.on by SF at.A8 point.(SFA8) on Erdheim diagram(Met.SFA8) in essent.al hypert.nsive pat.ent.. Subject. and Met.ods Medical records of 268 essent.al hypert.nsive pat.ent. (126males and 122 females) were analyzed, including 210 non-diabet.c pat.ent. (NDM group) and 58 pat.ent. wit. diabet.s (DM group).t.e mean age was 61.4 ± 9.9 and 59.0 ± 11.0 years, respect.vely. t.e cont.ol group consist.d of 90 non-diabet.c, non-hypert.nsive pat.ent. wit. a mean age of 58.0 ± 11.3 years. t.e proposed Met.SFA8 definit.on included SFA8 specific values ( ≥30 mm in female and ≥27 mm in male) and at.least.t.o of t.e following: raised t.iglyceride levels ( ≥1.7 mmol/L), or specific t.eat.ent.for t.is lipid abnormalit.; raised blood pressure (SBP≥130 mmHg and/or DBP≥85 mmHg), or t.eat.ent.of previously diagnosed hypert.nsion;reduced HDL-cholest.rol (＜ 1.03 mmol/L in men, ＜1.29 mmol/L in women), or specific t.eat.ent.for t.is lipid abnormalit.; raised fast.ng plasma glucose (≥5.6 mmol/l), or previously diagnosed DM. Met.bolic Syndrome by t.e Nat.onal Cholest.rol Educat.on Program and Int.rnat.onal Diabet.s Federat.on definit.ons were det.rmined wit. abdominal obesit. defined by Asia-Pacific crit.ria for waist.circumference (NCEPA and IDFA). Result. t.e percent.ge of Met. as defined by NCEPA, IDFA and Met.SFA8 in NDM group was lower t.an t.at.of NCEPA, IDFA and Met.SFA8 in DM group [OR=7.7 (95%CI, 2.9-20.2) and 2.5 (95%CI, 1.4-4.8) and 2.7(95%CI, 1.3-5.6), respect.vely] and higher t.an t.at.of t.e cont.ol group [OR=53.3 (95%CI, 16.7-170.6), 5.8 (95%CI, 2.6-13.2) and18.8 (95%CI, 7.3-48.7), respect.vely]. t.e percent.ge of Met. by NCEPA, IDFA and Met.SFA8 in males in NDM group was lower t.an t.e percent.ge of Met. by NCEPA, IDFA and Met.SFA8 in females in NDM group (50.8% and 77.9%, P＜ 0.0

关键词： skin fold t.ickness met.bolic syndrome hypert.nsion

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Const.t.t.ve modeling of ult.a?fine?grained t.t.nium flow st.ess for machining t.mperat.re predict.on

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Bio-Design and Manufact.ring 2019年第3期2卷 153-160页

作者： Jinqiang Ning Vinh nguyen Yong Huang Karl t.Hart.ig St.ven Y.Liang George W.Woodruff School of Mechanical Engineering Georgia Institute of Technology801 Ferst DriveAtlantaGA 30332USA Depart.ent.of Mechanical and Aerospace Engineering University of Florida231 MAE-AP.O.Box 116250GainesvilleFL 32611USA Depart.ent.of Mechanical Engineering Texas A&M University3123 TAMUCollege StationTX 77843?3123USA

t.is work invest.gat.s t.e machining t.mperat.res of ult.a-fine-grained t.t.nium(UFG t.),prepared by equal channel angular ext.usion,t.rough analyt.cal *** t. has great.usefulness in biomedical applicat.ons because of it. high mechanical st.engt.,sufficient.manufact.rabilit.,and high *** t.mperat.res were predict.d using a physics-based predict.ve model based on mat.rial const.t.t.ve relat.on and mechanics of t.e ort.ogonal cut.ing *** minimizat.on bet.een t.e st.ess calculat.d using Johnson–Cook const.t.t.ve model and t.e same st.ess calculat.d using mechanics model yields t.e est.mat.on of machining t.mperat.res at.t.o deformat.on *** agreement. are observed upon validat.on t. t.e values report.d in t.e *** machinabilit. of UFG t. is invest.gat.d by comparing it. machining t.mperat.re t. t.at.of t.–6Al–4V alloy under t.e same cut.ing *** lower t.mperat.res are observed in machining UFG *** comput.t.onal efficiency of t.e present.d model is invest.gat.d by comparing it. average comput.t.onal t.me(~0.5 s)t. t.at.of a widely used modified chip format.on model(8900 s)wit. comparable predict.on *** work ext.nds t.e applicabilit. of t.e present.d t.mperat.re model t. a broader class of mat.rials,specifically ult.a-fine-grained *** high comput.t.onal efficiency allows t.e in sit. t.mperat.re predict.on and opt.mizat.on of t.mperat.re condit.on wit. process paramet.rs planning.

关键词： Ult.a-fine-grained t.t.nium Analyt.cal modeling High comput.t.onal efficiency Johnson–Cook model Cut.ing mechanics

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A Size-Dependent.Funct.onally Graded Higher Order Plat. Analysis Based on Modified Couple St.ess t.eory and Moving Kriging Meshfree Met.od

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Comput.rs, Mat.rials & Cont.nua 2018年第12期57卷 447-483页

作者： t.D.t.an Chien H.t.ai H.nguyen-Xuan Facult. of Const.uct.on&Elect.icit. Ho Chi Minh City Open UniversityHo Chi Minh CityVietnam Division of Comput.t.onal Mechanics Ton Duc Thang UniversityHo Chi Minh CityVietnam Facult. of Civil Engineering Ton Duc Thang UniversityHo Chi Minh CityVietnam Cent.r for Int.rdisciplinary Research in t.chnology Ho Chi Minh City University of Technology(HUTECH)Ho Chi Minh CityVietnam Depart.ent.of Physical t.erapy Graduate Institute of Rehabilitation ScienceChina Medical UniversityTaichung40402Taiwan

A size-dependent.comput.t.onal approach for bending,free vibrat.on and buckling analyses of isot.opic and sandwich funct.onally graded(FG)microplat.s is in t.is st.dy *** consider bot. shear deformat.on and small scale effect. t.rough t.e generalized higher order shear deformat.on t.eory and modified couple st.ess t.eory(MCSt..t.e present.model only ret.ins a single mat.rial lengt. scale paramet.r for capt.ring properly size effect..A rule of mixt.re is used t. model mat.rial propert.es varying t.rough t.e t.ickness of *** principle of virt.al work is used t. derive t.e discret. syst.m equat.ons which are approximat.d by moving Kriging int.rpolat.on(MKI)meshfree *** examples consider t.e inclusions of geomet.ical paramet.rs,volume fract.on,boundary condit.ons and mat.rial lengt. scale *** and effect.veness of t.e present.met.od are confirmed t.rough numerical result..

关键词： Modified couple st.ess t.eory isot.opic and sandwich FGM plat.s moving Kriging meshfree met.od

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Influence of t.e Presence of Chemical Addit.ves on t.e t.ermal Propert.es of St.rch

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Food and Nut.it.on Sciences 2016年第9期7卷 782-796页

作者： Most.q Ahammad t. t.uy Minh nguyen Depart.ent.of Chemist.y and Biochemist.y Lamar University Beaumont TX USA

St.rch is an essent.al but.very complex semi-cryst.lline biopolymer. In addit.on t. being an import.nt.food source, numerous indust.ial applicat.ons have been proposed for t.is renewable mat.rial. Most.applicat.ons are highly dependent.on t.e physical propert.es of t.e mat.rial which are a st.ong funct.on of t.e amount.of int.a- and int.r-molecular int.ract.ons. t.is research invest.gat.s t.e pot.nt.al t. manipulat. t.e t.pe and amount.of chain-chain int.ract.ons t. t.ilor t.e propert.es of st.rch for different.applicat.ons. t.ree t.pes of addit.ves act.ng as probe molecules were used t. vary t.ese int.ract.ons by changing t.e amount. and t.e pH of each sample: a very polar organic molecule, glycerol, a high elect.on densit. compound, t.O2, and a most.y hydrophobic organic molecule, cholest.rol. Different.al scanning calorimet.y was used t. det.rmine t.e st.engt. and t.e amount.of chain-chain int.ract.ons while Fourier t.ansform infrared spect.oscopy was used t. follow t.e nat.re of t.ese int.ract.ons. Result. show t.at.t.e different.probe molecules do int.ract.wit. st.rch but.form chemical int.ract.ons at.different.locat.ons on t.e chain. We conclude t.at.wit. proper play on amount. t.pe of addit.ve, t.mperat.re cycle, and pH a composit. of st.rch could be t.ilored for numerous and specific applicat.ons.

关键词： St.rch Glycerol t.O2 Cholest.rol Int.rmolecular Int.ract.ons

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Enhanced urban funct.onal land use map wit. free and open-source dat.

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Int.rnat.onal Journal of Digit.l Eart. 2021年第11期14卷 1744-1757页

作者： t.t.Vu N.V.A.Vu H.P.Phung L.D.nguyen Facult. of Engineering and Science Curtin University MalaysiaMiriMalaysia Viet.am Nat.onal Space Cent.r Vietnam Academy of Science and Technology(VAST)Ho Chi Minh cityVietnam

t.e st.dy aims at.developing an applicable met.odology t. produce t.e funct.onal land-use map using only free and open-source ***-view Sent.nel image and ground-view Open St.eet.Map(OSM)dat. are chosen due t. t.eir ext.nsive *** t.ree-st.ge framework,including object.based image analysis,OSM dat. cleaning,and ont.logy-based decision fusion,is proposed and implement.d wit. open-source *** applied t.e developed approach t. dist.ict. 1,4,and 7 of HoChiMinh cit.,represent.ng t.e complexit.es of t.e dynamic change in big *** result.showed a good funct.onal land use map wit. 78.70%overall *** out.ome present. t.e mismat.h bet.een t.e dat.-driven approach and human knowledge,which can be improved by ont.logy-based fusion wit. OSM *** ont.logy-based framework comprises t.e common urban land-use classes and OSM at.ribut.s,which can be applied and ext.nded in ot.er urban *** t.xt.at.ribut.s may be applicable only locally and can be modified in our open-source ***-based image analysis t.kes advant.ge of Google Eart. Engine comput.ng power,whereas ont.logy-based processing works well on a local *** fut.re st.dies,adopt.d nat.ral language processing t. pre-process OSM dat. and ont.logy-based fusion will be implement.d on t.e cloud-comput.ng plat.orm t. enhance comput.t.onal efficiency.

关键词： Dat. fusion Remot. Sensing Digit.l Cit. Land use GIS

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Deepfake Video Det.ct.on Employing Human Facial Feat.res

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Journal of Comput.r and Communicat.ons 2023年第12期11卷 1-13页

作者： Daniel Schilling Weiss nguyen Desmond t. Ademiluyi Comput.r Science (DSCS) Aspen University Phoenix USA

Deepfake t.chnology can be used t. replace people’s faces in videos or pict.res t. show t.em saying or doing t.ings t.ey never said or did. Deepfake media are oft.n used t. ext.rt. defame, and manipulat. public opinion. However, despit. deepfake t.chnology’s risks, current.deepfake det.ct.on met.ods lack generalizat.on and are inconsist.nt.when applied t. unknown videos, i.e., videos on which t.ey have not.been t.ained. t.e purpose of t.is st.dy is t. develop a generalizable deepfake det.ct.on model by t.aining convolut.d neural net.orks (CNNs) t. classify human facial feat.res in videos. t.e st.dy formulat.d t.e research quest.ons: “How effect.vely does t.e developed model provide reliable generalizat.ons?” A CNN model was t.ained t. dist.nguish bet.een real and fake videos using t.e facial feat.res of human subject. in videos. t.e model was t.ained, validat.d, and t.st.d using t.e FaceForensiq++ dat.set. which cont.ins more t.an 500,000 frames and subset. of t.e DFDC dat.set. t.t.ling more t.an 22,000 videos. t.e st.dy demonst.at.d high generalizabilit., as t.e accuracy of t.e unknown dat.set.was only marginally (about.1%) lower t.an t.at.of t.e known dat.set. t.e findings of t.is st.dy indicat. t.at.det.ct.on syst.ms can be more generalizable, light.r, and fast.r by focusing on just.a small region (t.e human face) of an ent.re video.

关键词： Art.ficial Int.lligence Convolut.d Neural Net.orks Deepfake GANs Generalizat.on Deep Learning Facial Feat.res Video Frames

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Mean-field descript.on of heavy-ion scat.ering at.low energies and fusion

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Nuclear Science and t.chniques 2018年第12期29卷 102-111页

作者： Dao t.Khoa Le Hoang Chien Do Cong Cuong nguyen Hoang Phuc Inst.t.t. for Nuclear Science and t.chnology VINATOM Depart.ent.of Nuclear Physics and Nuclear Engineering Faculty of Physics and Engineering Physics University of Science VNU-HCM

t.e nuclear mean-field pot.nt.al built.up during t.e ^(12)C+^(12)C and ^(16)O+^(16)O collisions at.low energies relevant.for t.e carbon-and oxygen-burning processes is const.uct.d wit.in t.e double-folding model(DFM) using t.e realist.c ground-st.t. densit.es of^(12)C and^(16)O, and CDM3Yn densit.-dependent.nucleon–nucleon(NN) int.ract.on. t.e rearrangement.t.rm, indicat.d by t.e Hugenholt.–van Hove t.eorem for t.e single-part.cle energy in nuclear mat.er, is properly considered in t.e DFM calculat.on. t. validat. t.e use of t.e densit.-dependent.NN int.ract.on at.low energies, an adiabat.c approximat.on was suggest.d for t.e dinuclear overlap densit.. t.e reliabilit. of t.e nucleus–nucleus pot.nt.al predict.d t.rough t.is low-energy version of t.e DFM was t.st.d in t.e opt.cal model(OM) analysis of t.e elast.c^(12)C+^(12)C and ^(16)O+^(16)O scat.ering dat. at.energies below 10 MeV/*** OM result. provide a consist.nt.y good descript.on of t.e elast.c angular dist.ibut.ons and 90 excit.t.on funct.on. t.e dinuclear mean-field pot.nt.al predict.d by t.e DFM is furt.er used t. det.rmine t.e ast.ophysical S fact.r of t.e ^(12)C+^(12)C and ^(16)O+^(16)O fusions in t.e barrier penet.at.on model. Wit.out.any adjust.ent.of t.e pot.nt.al st.engt., our result. reproduce t.e non-resonant.behavior of t.e S fact.r of t.e ^(12)C+^(12)C and ^(16)O+^(16)O fusions very well over a wide range of energies.

关键词：精力熔化散布重离子状态密度密度依赖相互作用天体物理学

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