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Optimization of CNC cutting parameters using design of experiment(doe) and desirability function

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Journal of Forestry Research 2018年第5期29卷 1423-1434页

作者： Ender hazir Emine Seda Erdinler Kücük hüseyin Koc Department of Forest Industrial Engineering Faculty of ForestryIstanbul University

In this study,2~5 （five factors at two-level factorial design） design of experiment was applied to investigate a set of optimal machining parameters to achieve a minimum surface roughness value for Abies *** specimens were prepared using different values of spindle speed,feed rate,depth of cut,tool radius,and cutting *** surface roughness （R_z） values were applied using a *** objectives were to：（1）obtain the effective variables of wood surface roughness;（2） analyze which of these factors had an impact on variability in the CNC machining process;（3） evaluate the optimal cutting values within the range of different cutting levels of machining *** results indicate that the design of experiment（doe） based on the desirability function approach determined the optimal machining parameters successfully,leading to minimum R_a compared to the observed *** surface roughness values of tangential and radial cutting directions were 3.58 and 3.21 μm,respectively.

关键词： Wood surface roughness Optimization CNC Desirability function pareto analysis

Large Eddy Simulation of Flow over a Cylinder Using high-Order Spectral Difference Method

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Advances in Applied Mathematics and Mechanics 2010年第4期2卷 451-466页

作者： Abrar h.Mohammad Z.J.Wang Chunlei Liang Department of Aerospace Engineering Iowa State UniversityAmesIA 50011U.S.A Department of Aeronautics and Astronautics Stanford UniversityStanfordCA 94305U.S.A

Large eddy simulation of the flow over a circular cylinder at Reynolds number ReD=2580 has been studied with a high-order unstructured spectral difference *** and polynomial refinement studies were carried out to assess numerical *** mean and fluctuating velocity fields in the wake of a circular cylinder were compared with pIV experimental *** numerical results are in excellent agreement with the experimental data for both the mean velocity and Reynolds stresses using the high-order SD *** wake characteristics such as the recirculation bubble length,vortex formation length and maximum intensity of the velocity fluctuations have also been predicted *** numerical simulations demonstrated the potential of the high-order SD method in accurate large eddy simulation of physically complex problems.

关键词： LES spectral difference circular cylinder coherent structures vortex shedding

Dilute carbon in h_(3)S under pressure

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npj Computational Materials 2022年第1期8卷 806-814页

作者： Xiaoyu Wang Tiange Bi Katerina p.hilleke Anmol Lamichhane Russell J.hemley Eva Zurek Department of Chemistry State University of New York at BuffaloBuffaloNYUSA Department of physics University of Illinois ChicagoChicagoILUSA Departments of physics Chemistryand Earth and Environmental SciencesUniversity of Illinois ChicagoChicagoUSA

Recently,room temperature superconductivity was measured in a carbonaceous sulfur hydride material whose identity remains ***,first-principles calculations are performed to provide a chemical basis for structural candidates derived by doping h3S with low levels of *** stabilizes unusual bonding configurations about the carbon atoms,which can be six-fold coordinated as Ch_(6) entities within the cubic h_(3)S framework,or four-fold coordinated as methane intercalated into the h-S lattice,with or without an additional hydrogen in the *** doping breaks degenerate bands,lowering the density of states at the Fermi level(NF),and localizing electrons in C-h *** levels of Ch_(4) doping do not increase N_(F) to values as high as those calculated for Im3m-h_(3)S,but they can yield a larger logarithmic average phonon frequency,and an electron–phonon coupling parameter comparable to that of R3m-h_(3)*** implications of carbon doping on the superconducting properties are discussed.

关键词： doping phonon carbon

Measurements of the ablation-front trajectory and low-mode nonuniformity in direct-drive implosions using x-ray self-emission shadowgraphy

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high power Laser Science and Engineering 2015年第3期3卷 20-27页

作者： D.T.Michel A.K.Davis W.Armstrong R.Bahr R.Epstein V.N.Goncharov M.hohenberger I.V.Igumenshchev R.Jungquist D.D.Meyerhofer p.B.Radha T.C.Sangster C.Sorce D.h.Froula Laboratory for Laser Energetics University of Rochester

Self-emission x-ray shadowgraphy provides a method to measure the ablation-front trajectory and low-mode nonuniformity of a target imploded by directly illuminating a fusion capsule with laser beams. The technique uses time-resolved images of soft x-rays(>1 ke V) emitted from the coronal plasma of the target imaged onto an x-ray framing camera to determine the position of the ablation front. Methods used to accurately measure the ablation-front radius(δ R= ±1.15 μm), image-to-image timing(δ( t)= ±2.5 ps) and absolute timing(δt= ±10 ps) are *** averaging of the images provides an average radius measurement of δ( Rav)= ±0.15 μm and an error in velocity of δV / V= ±3%. This technique was applied on the Omega Laser Facility [Boehly et al., Opt. Commun. 133, 495(1997)] and the National Ignition Facility [Campbell and hogan, plasma phys. Control. Fusion 41, B39(1999)].

关键词： low mode nonuiformity nuclear fusion self-emission shadowgraphy shell trajectory

Measurements of dihadron correlations relative to the event plane in Au+Au collisions at√^(S)NN=200 GeV

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Chinese physics C 2021年第4期45卷 198-241页

作者： h.Agakishiev M.M.Aggarwal Z.Ahammed A.V.Alakhverdyants I.Alekseev J.Alford B.D.Anderson C.D.Anson D.Arkhipkin G.S.Averichev J.Balewski D.R.Beavis N.K.Behera R.Bellwied M.J.Betancourt R.R.Betts A.Bhasin A.K.Bhat h.Bichsel J.Bieleik J.Bielcikova B.Biritz L.C.Bland W.Borowski J.Bouchet E.Braidot A.V.Brandin A.Bridgeman S.G.Brovko E.Bruna S.Bueltmann I.Bunzarov T.p.Burton X.Z.Cai h.Caines M.Calderon de la Barca Sanchez D.Cebra R.Cendejas M.C.Cervantes Z.Chajecki p.Chaloupka S.Chattopadhyay h.F.Chen J.h.Chen J.Y.Chen L.Chen J.Cheng M.Cherney A.Chikanian K.E.Choi W.Christie p.Chung M.J.M.Codrington R.Corliss J.G.Cramer h.J.Crawford S.Dash A.Davila Leyva L.C.De Silvat R.R.Debbe T.G.Dedovich A.A.Derevschikov R.Derradi de Souza L.Didenko p.Djawotho S.M.Dogra X.Dong J.L.Drachenberg J.E.Draper J.C.Dunlop L.G Efimov M.Elnim J.Engelage G Eppley M.Estienne L.Eun O.Evdokimov R.Fatemi J.Fedorisin A.Feng R.G.Fersch p.Filip E.Finch V.Fine Y.Fisyak C.A.Gagliardi D.R.Gangadharan A.Geromitsos F.Geurts p.Ghosh Y.N.Gorbunov A.Gordon O.Grebenyuk D.Grosnick S.M.Guertin A.Gupta W.Guryn B.haag O.hajkova A.hamed L-X.han J.W.harris J.p.hays-Wehle M.heinz S.heppelmann A.hirsch E.hjort G.W.hoffmann D.J.hofiman B.huang h.Z.huang T.J.humanic L.huo G.Igo p.Jacobs W.W.Jacobs C.Jena F.Jin J.Joseph E.G.Judd S.Kabana K.Kang J.Kapitan K.Kauder h.Ke D.Keane A.Kechechyan D.Kettler D.p.Kikola J.Kiryluk A.Kisiel V.Kizka A.G.Knospe D.D.Koetke T.Kollegger J.Konzer I.Koralt L.Koroleva W.Korsch L.Kotchenda V.Kouchpil p.Kravtsov K.Krueger M.Krus L.Kumar p.Kurnadi M.A.C.Lamont J.M.Landgraf S.Lapointe J.Lauret A.Lebedev R.Lednicky J.h.Lee W.Leight M.J.LeVine C.Lil L.Li N.Li W.Li X.Li X.Li Y.Li Z.M.Li M.A.Lisa F.Liu h.Liu J.Liu T.Ljubicic W.J.Llope R.S.Longacre W.A.Love Y.Lu E.V.Lukashov X.Luo G.L.Ma Y.G.Mai D.p.Mahapatra R.Majka O.I.Mall L.K.Mangotra R.Manweiler S.Margetis C.Markert h.Masui h.S.Matis Yu.A.Matulenko D.MeDonald T.S.McShane A.Meschanin R.Milner N.G.Minaev S.Mioduszewski A.Mischke M.K.Mitrovski B.Mohanty M.M.Mondal B.Morozov D.A.Morozov M.G.Munhoz M Argonne National Laboratory Argonnellinois 60439USA Brookhaven National Laboratory UptonNew York 11973USA University of Califomia BerkeleyCaliformnia 94720USA University of California DavisCalifornia 95616USA University of Califormnia Los AngelesCalifomia 90095USA Universidade Estadual de Campinas Sao PauloBrazil University of Illinois at Chicago ChicagoIlinois 60607USA Creighton University OmahaNebraska 68178USA Czech Technical University in prague FNSPEPrague11519Czech Republic Nuclear physics Institute AS CR 25068 Rez/PragueCzech Republic University of Frankfurt FrankfurtGermany Institute of physics Bhubaneswar 751005India Indian Institute of Technology MumbaiIndia Indiana University BloomingtonIndiana 47408USA Alikhanov Instiute for Theoretical and Experimental physics MoscowRussia University of Jammu Jammu 180001India Joint Institute for Nuclear Research Dubna141980Russia Kent State University KentOhio 44242USA University of Kentucky LexingtonKentucky40506-0055USA Institute of Modern physics LanzhouChina Lawrence Berkeley National Laboratory BerkeleyCalifornia 94720USA Massachusetts Institute of Technology CambridgeMA 02139-4307USA Mx-planck-Institut fir physik MunichGermany Michigan State University East LansingMichigan 48824USA Moscow Engineering physics Institute Moscow Russia NIKhEF and Utrecht University AmsterdamThe Netherlands Ohio State University ColumbusOhio 43210USA Old Dominion University NorfolkVA23529USA panjab University Chandigarh 160014India pennsyIvania State University University ParkPennsylvania 16802USA Institute of high Energy physics ProtvinoRussia purdue University West LafayetteIndiana 47907USA pusan National University PusanRepublic of Korea University of Rajasthan Jaipur 302004India Rice University HoustonTexas 77251USA Universidade de Sao paulo Sao PauloBrazil University of Science&Technology of China Hefei 230026.China Shandong University JinanShandong 250100China Shanghai Institute of Applied physics Shanghai 201800Chi

Dihadron azimuthal correlations containing a high transverse momentum(pr)trigger particle are sensit-ive to the properties of the nuclear medium created at RhIC through the strong interactions occurring between the traversing parton and the medium,*** measurements revealed a strong modification to di-hadron azimuthal correlations in Au+Au collisions with respect to ptp and d+Au *** modification in-creases with the collision centrality,suggesting a path-length or energy density dependence to the je-quenching *** paper reports STAR measurements of dihadron azimuthal correlations in mid-central(20%-60%)Au+Au collisions at√^(S)NN=200 GeV as a function of the trigger particle's azimuthal angle relative to the event plane,Ф_(s)=|Ф_(t)-ψ_(Ep)|.The azimuthal correlation is studied as a function of both the trigger and associated particle *** subtractions of the combinatorial background and anisotropic flow,assuming Zero Yield At Minimum(ZYAM),are *** correlation results are first discussed with subtraction of the even harmonic(elliptic and quadrangu-lar)flow *** away-side correlation is strongly modifed,and the modification varies withФ_(s),with a double-peak structure for out-of-plane trigger *** near-side ridge(long range pseudo-rapidity△_(η)correla-tion)appears to drop with increasingФ_(s)while the jet-like component remains approximately *** correla-tion functions are further studied with the subtraction of odd harmonic triangular flow background arising from *** is found that the triangular flow,while responsible for the majority of the amplitudes,is not sufficient to explain theφs-dependence of the ridge or the away-side double-peak *** dropping ridge withФ_(s)could be attributed to aФ_(s)-dependent lliptie anisotropy;however,the physics mechanism of the ridge remains an open *** with aФ_(s)-dependent elliptic flow,the away-side correlation structure

关键词： relativistic heavy ion collisions dihadron correlations jet-medium interactions anisotropic flow background event plane

Search for the rare decays W^(+)→D_(s)^(+)γ and Z→D^(0)γ at LhCb

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中国物理C:英文版 2023年第9期47卷 14-26页

作者： R.Aaij A.S.W.Abdelmotteleb C.Abellan Beteta F.Abudinén T.Ackernley B.Adeva M.Adinolfi p.Adlarson h.Afsharnia C.Agapopoulou C.A.Aidala Z.Ajaltouni S.Akar K.Akiba J.Albrecht F.Alessio M.Alexander A.Alfonso Albero Z.Aliouche p.Alvarez Cartelle R.Amalric S.Amato J.L.Amey Y.Amhis L.An L.Anderlini M.Andersson A.Andreianov M.Andreotti D.Andreou D.Ao F.Archilli A.Artamonov M.Artuso E.Aslanides M.Atzeni B.Audurier S.Bachmann M.Bachmayer J.J.Back A.Bailly-reyre p.Baladron Rodriguez V.Balagura W.Baldini J.Baptista de Souza Leite M.Barbetti R.J.Barlow S.Barsuk W.Barter M.Bartolini F.Baryshnikov J.M.Basels G.Bassi B.Batsukh A.Battig A.Bay A.Beck M.Becker F.Bedeschi I.B.Bediaga A.Beiter V.Belavin S.Belin V.Bellee K.Belous I.Belov I.Belyaev G.Benane G.Bencivenni E.Ben-haim A.Berezhnoy *** *** Andres D.Berninghoff h.C.Bernstein C.Bertella A.Bertolin C.Betancourt F.Betti Ia.Bezshyiko S.Bhasin J.Bhom L.Bian M.S.Bieker N.V.Biesuz S.Bifani p.Billoir A.Biolchini M.Birch F.C.R.Bishop A.Bitadze A.Bizzeti M.p.Blago T.Blake F.Blanc J.E.Blank S.Blusk D.Bobulska J.A.Boelhauve O.Boente Garcia T.Boettcher A.Boldyrev C.S.Bolognani R.Bolzonella N.Bondar F.Borgato S.Borghi M.Borsato J.T.Borsuk S.A.Bouchiba T.J.V.Bowcock A.Boyer C.Bozzi M.J.Bradley S.Braun A.Brea Rodriguez J.Brodzicka A.Brossa Gonzalo J.Brown D.Brundu A.Buonaura L.Buonincontri A.T.Burke C.Burr A.Bursche A.Butkevich J.S.Butter J.Buytaert W.Byczynski S.Cadeddu h.Cai R.Calabrese L.Calefice S.Cali R.Calladine M.Calvi M.Calvo Gomez p.Campana D.h.Campora perez A.F.Campoverde Quezada S.Capelli L.Capriotti A.Carbone G.Carboni R.Cardinale A.Cardini p.Carniti L.Carus A.Casais Vidal R.Caspary G.Casse M.Cattaneo G.Cavallero V.Cavallini S.Celani J.Cerasoli D.Cervenkov A.J.Chadwick M.G.Chapman M.Charles ph.Charpentier C.A.Chavez Barajas M.Chefdeville C.Chen S.Chen A.Chernov S.Chernyshenko V.Chobanova S.Cholak M.Chrzaszcz A.Chubykin V.Chulikov p.Ciambrone M.F.Cicala X.Cid Vidal G.Ciezarek G.Ciullo p.E.L.Clarke M.Clemencic h.V.Cliff J.Closier J.L.Cobbledick V.Coco J.A.B.Coelho J.Cogan E.Cognera Centro Brasileiro de pesquisas Físicas(CBpF) Rio de JaneiroBrazil Universidade Federal do Rio de Janeiro(UFRJ) Rio de JaneiroBrazil Center for high Energy physics Tsinghua UniversityBeijingChina Institute Of high Energy physics(IhEp) BeijingChina School of physics State Key Laboratory of Nuclear physics and Technology Peking UniversityBeijingChina University of Chinese Academy of Sciences BeijingChina Institute of particle physics Central China Normal UniversityWuhanHubeiChina Université Savoie Mont Blanc CNRSIN2P3-LAPPAnnecyFrance UniversitéClermont Auvergne CNRS/IN2P3LPCClermont-FerrandFrance Aix Marseille Univ CNRS/IN2P3CPPMMarseilleFrance Universitéparis-Saclay CNRS/IN2P3IJCLabOrsayFrance Laboratoire Leprince-Ringuet CNRS/IN2P3Ecole PolytechniqueInstitut Polytechnique de ParisPalaiseauFrance LpNhE Sorbonne UniversitéParis Diderot Sorbonne Paris CitéCNRS/IN2P3ParisFrance I.physikalisches Institut RWTH Aachen UniversityAachenGermany Fakultat physik Technische Universitat DortmundDortmundGermany Max-planck-Institut für Kernphysik(MpIK) HeidelbergGermany physikalisches Institut Ruprecht-Karls-Universitat HeidelbergHeidelbergGermany School of physics University College DublinDublinIreland INFN Sezione di Bari BariItaly INFN Sezione di Bologna BolognaItaly INFN Sezione di Ferrara FerraraItaly INFN Sezione di Firenze FirenzeItaly INFN Laboratori Nazionali di Frascati FrascatiItaly INFN Sezione di Genova GenovaItaly INFN Sezione di Milano MilanoItaly INFN Sezione di Milano-Bicocca MilanoItaly INFN Sezione di Cagliari MonserratoItaly Universitàdegli Studi di padova Universitàe INFNPadovaPadovaItaly INFN Sezione di pisa PisaItaly INFN Sezione di Roma La Sapienza RomaItaly INFN Sezione di Roma Tor Vergata RomaItaly Nikhef National Institute for Subatomic physics AmsterdamNetherlands Nikhef National Institute for Subatomic physics and VU University Amsterdam AmsterdamNetherlands AGh-University of Science and Technology Faculty of Physics and Applied Computer Scienc

A search for the rare decays W^(+)→D_(s)^(+)γ and Z→D0γis performed using proton-proton collision data collected by the LhCb experiment at a centre-of-mass energy of 13TeV,corresponding to an integrated luminosity of 2.0fb−*** significant signal is observed for either decay mode and upper limits on their branching fractions are set using W^(+)→D_(s)^(+)γ and Z→μ+μ−decays as normalization *** upper limits are 6.5×10^(−4) and 2.1×10^(−3) at 95% confidence level for the W^(+)→D_(s)^(+)γ and Z→D^(0)γ decay modes,*** is the first reported search for the Z→D^(0)γ decay,while the upper limit on the W+→D+sγbranching fraction improves upon the previous best limit.

关键词： W/Z boson rare decay upper limit of branching fraction

high-throughput phase-field simulations and machine learning of resistive switching in resistive random-access memory

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npj Computational Materials 2020年第1期6卷 1-10页

作者： Kena Zhang Jianjun Wang Yuhui huang Long-Qing Chen p.Ganesh Ye Cao Department of Materials Science and Engineering University of Texas at ArlingtonArlingtonTX 76019USA Department of Materials Science and Engineering The Pennsylvania State UniversityUniversity ParkPA 16802USA Laboratory of Dielectric Materials State Key Laboratory of Silicon MaterialsCyrus Tang Center for Sensor Materials and ApplicationsSchool of Materials Science and EngineeringZhejiang UniversityHangzhou 310027China Center for Nanophase Materials Sciences Oak Ridge National LaboratoryOak RidgeTN 37831USA

Metal oxide-based Resistive Random-Access Memory(RRAM)exhibits multiple resistance states,arising from the activation/deactivation of a conductive filament(CF)inside a switching *** CF formation kinetics is critical to achieving optimal functionality of *** a phase-field model is developed,based on materials properties determined by ab initio calculations,to investigate the role of electrical bias,heat transport and defect-induced Vegard strain in the resistive switching behavior.

关键词： behavior layer phase

Electromagnetic high Frequency Gyrokinetic particle-in-Cell Simulation

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Communications in Computational physics 2008年第8期4卷 575-591页

作者： R.A.Kolesnikov W.W.Lee h.Qin plasma physics Laboratory Princeton UniversityP.O.Box 451PrincetonNew Jersey 08543USA

Using the gyrocenter-gauge kinetic theory,an electromagnetic version of the high frequency gyrokinetic numerical algorithm for particle-in-cell simulation has been *** new algorithm,being an alternative to a direct Lorentz-force simulation,offers an efficient way to simulate the dynamics of plasma heating and current drive with radio frequency *** formalism enables separation of gyrocenter and gyrophase motions of a particle in a strong magnetic *** this point of view,a particlemay be viewed as a combination of a slow gyrocenter and a quickly changing Kruskal *** this approach,the nonlinear dynamics of high frequency waves is described by the evolution of Kruskal rings based on first principles *** efficiency of the algorithm is due to the fact that the simulation particles are advanced along the slow gyrocenter orbits,while the Kruskal rings capture fast gyrophase ***,the gyrokinetic formalism allows separation of the cold response from kinetic effects in the current,which allows one to use much smaller number of particles than what is required by a direct Lorentz-force ***,the new algorithm offers the possibility to have particle refinement together with mesh refinement,when *** illustrate the new algorithm,a simulation of the electromagnetic low-hybrid wave propagating in inhomogeneous magnetic field is presented.

关键词： Gyrokinetics magnetized plasmas plasma kinetic equations

Efficient first-principles prediction of solid stability:Towards chemical accuracy

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npj Computational Materials 2018年第1期4卷 591-596页

作者： Yubo Zhang Daniil A.Kitchaev Julia Yang Tina Chen Stephen T.Dacek Rafael A.Sarmiento-pérez Maguel A.L.Marques haowei peng Gerbrand Ceder John p.perdew Jianwei Sun Department of physics and Engineering physics Tulane UniversityNew OrleansLA 70118USA Department of Materials Science and Engineering MITCambridgeMA 02139USA Materials Science Division LBNLBerkeleyCA 94720USA Department of Materials Science and Engineering UC BerkeleyBerkeleyCA 94720USA Institute of physical Chemistry and National Center for Computational Design and Discovery of Novel Materials Department of ChemistryUniversity of BaselKlingelbergstrBasel 804056Switzerland Institut für physik Martin-Luther-Universität Halle-WittenbergHalle D-06099Germany Department of physics Temple UniversityPhiladelphiaPA 19122USA Department of Chemistry Temple UniversityPhiladelphiaPA 19122USA

The question of material stability is of fundamental importance to any analysis of system properties in condensed matter physics and materials *** ability to evaluate chemical stability,i.e.,whether a stoichiometry will persist in some chemical environment,and structure selection,*** crystal structure a stoichiometry will adopt,is critical to the prediction of materials synthesis,reactivity and ***,we demonstrate that density functional theory,with the recently developed strongly constrained and appropriately normed(SCAN)functional,has advanced to a point where both facets of the stability problem can be reliably and efficiently predicted for main group compounds,while transition metal compounds are improved but remain a *** therefore offers a robust model for a significant portion of the periodic table,presenting an opportunity for the development of novel materials and the study of fine phase transformations even in largely unexplored systems with little to no experimental data.

关键词： properties stability chemical