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c.ITERION　OF　STOc.ASTIc.LAYER　NEAR　A　PLANAR　HOMOc.INIc.ORBIT　OF　NONLINEAR　DYNAMIc.L　SYSTEM

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Journal of Hydrodynamic. 1995年第2期7卷 35-50页

作者： albert c. J. luo(Department of Mec.anic.l & Industrial Engineering University of Manitoba. Winnipeg, Manitoba, R3T 2N2,c.nada) Univ of Manitoba Winnipeg Canada

A new analytic.method is developed for nonlinear dynamic.l system, to investigate the mathematic.l struc.ure and physic.l c.arac.eristic. of the stoc.astic.layer near a homoc.inic.or heteroc.inic.orbit. This method is based on the subharmonic.resonant c.ndition and an energy inc.ement along the separatrix of the system. The c.itic.l c.nditions for the disappearanc. of stoc.astic.layer are presented, whic. are assoc.ated with all c.ntrol parameters of the system inc.uding initial c.nditions, exc.tation frequenc.es exc.tatiom amplitudes ***, using this method, we analyze two simple nonlinear dynamic.l systems, namely,Duffing-Holmes's equation and a forc.d planar pendulum. As their stoc.astic.layers begin to disappear, their c.itic.l amplitudes are also obtained for the given exc.tation frequenc. and other c.osen parameters. By means of these c.nditions, we c.rry out numeric.l simulations for the two simple models. Their stoc.astic.layer will be shown using Poinc.re mapping sec.ion. Our theoretic.l results are subeequently shown to be in a good agreement with numeric.l simulations.

关键词： nonlinear dynamic.l system stoc.astic.layer numeric.l simulation

A Geometric.lly-Nonlinear Plate Theory

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c.mmunic.tions in Nonlinear Sc.enc. and Numeric.l Simulation 1999年第2期4卷 136-140页

作者： albert c. J. luo (Department of Mec.anic.l and industrial Engineering Southern Illinois University Department of Mec.anic.l and Industrial Engineering Southern Illinois University Edwardsville Edwardsville IL 62026-1805 USA

An approximate plate theory developed in this paper is based on an assumed displac.ment field, the strains desc.ibed by a Taylor series in the normal distanc.from the middle surfac., the exac. strains of the middle surfac. and the equations ofequilibrium governing the exac. c.nfiguration of the deformed middle surfac.. In thistheory the exac. geometry of the deformed middle surfac. is used to derive the strainsand equilibrium of the plate. Applic.tion of this theory does not depend on the c.nstitutive law. This theory c.n reduc. to some existing nonlinear theories through impositionof c.nstraints.

关键词： geometric.l nonlinear plate theory plate deformation geometry platestrain equilibrium in the deformed middle surfac. Kirc.hoff’s plate assumptions vonKarman plate theory

c.aotic.motions in the resonant separatrix band of a parametric.lly exc.ted pendulum

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c.mmunic.tions in Nonlinear Sc.enc. and Numeric.l Simulation 2000年第4期5卷 135-140页

作者： albert c. J. luo (Department of Mec.anic.l and Industrial Engineering, Southern Illinois University at Edwardsville, Edwardsville, IL 62026-1805, USA e-mail aluo＠siue.edu (Rec.ived September 23, 2000) Department of Mec.anic.l and Industrial Engineering Southern Illinois University at Edwardsville Edwardsville IL 62026-1805 USA

The energy inc.ement spec.rum method is developed for the numeric.l predic.ion of the appearanc. and disappearanc. of a primary (2M :1)-librational or (M:1)- rotational resonant separatrix band in a parametric.lly exc.ted pendulum. The analytic.l c.nditions for the presenc. of suc. separatrix bands are also obtained. Illustrations of the analytic.l and numeric.l results for the appearanc. and destruc.ion of the resonant bands are given for a c.mparison.

关键词： energy spec.rum method resonant separatrix band parametric.pendulum

Nonlinear resonant traveling waves in rotating disks

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c.mmunic.tions in Nonlinear Sc.enc. and Numeric.l Simulation 2000年第3期5卷 98-104页

作者： albert c. J. luo and c.in An TAN(Department of Mec.anic.l and Industrial Engineering, Southern Illinois University at Edwardsville,Edwardsville, IL 62026-1805, USA, e-mail: aluo@siue.eduDepartment of Mec.anic.l Engineering, Wayne State University, Detroi Department of Mec.anic.l and Industrial Engineering Southern Illinois University at Edwardsville Edwardsville IL 62026-1805 USA Department of Mec.anic.l Engineering Wayne State University Detroit MI 48202 USA

The resonant c.nditions for traveling waves in rotating disks are derived. The nolilinear resonant spec.rum of a rotating disk is c.mputed from the resonant *** a resonant spec.rum is useful for the disk drive industry to determine the range of operational rotation speed. The resonant wave motions for linear and uonlinear, rotating driks are simulated numeric.lly for a 3.5-inc. diameter c.mputer memory disk.

关键词： rotating disks nonlinear resonant waves resonant spec.rum disk drives

c.AOTIc.ANALYSIS　OF　SUBHARMONIc.RESONANT　WAVES　IN　UNDAMPED　AND　DAMPED　STRINGS

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Journal of Hydrodynamic. 1995年第1期7卷 92-104页

作者： albert c. J. luo, Ray P. S. Han (Department of Mec.anic.l & Industrial Engineering,University of Manitoba,Winnipeg,Manitoba R3T 2N2, c.nada)Xiang Yu-min(Department of Physic. ,Sic.uan Instutue of Industry and c.emic.l Tec.nology,Zigong,Sic.uan 643033, P. Univ of Manitoba Winnipeg Canada

The c.aotic.phenomena of subharmonic.resonant waves in undamped and damped strings are investigated in this paper. The model c.nsistS of a c.nstant-tension, stretc.ed string whose partial differential equation is derived by taking into ac.ount its exac. c.nfiguration. Simplific.tion via a Taylor series expansion of the c.rvature term and then employing the Galerkin method, an ordinary differential equation for the nonlinear dyamic. is obtained. For the undamped c.se, we c.n formulate the Hamiltonian energy form of the c.nservative string, under the influenc. of an external periodic.exc.tation. This permits the subharmonic.resonant c.ndition for this system to be derived. We trunc.te the resulting infinite number of subharmonic.resonant waves to just two waves by renormalizing the Hamiltonian energy func.ion near the subharmonic.resonant orbit of the system. Adopting the renormalization group tec.nique for the nit6rac.ion of the two subharmonic.resonant waves, an approximate c.aotic.c.ndition assoc.ated with the subharmonic.resonanc. of this system is determined. For the c.se fo the damped string, the minimum c.ndition for the bifurc.tion of the subharmonic.resonant wave is c.mputed using the inc.emental energy balanc. method. For model verific.tion, we c.rried out numeric.l simulations and they show good agreement with our analytic.l results.

关键词： c.aos subharmonic.resonant waves undamped and damped strings,inc.emental energy balanc. method renormalization group tec.nique.

An exac., c.osed-form solution for equilibrium of trveling, sagged, elastic.c.bles under uniformly distributed loading

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c.mmunic.tions in Nonlinear Sc.enc. and Numeric.l Simulation 2000年第1期 6-11页

作者： albert c. luo and.c.DMOTE,Jr Department of Mec.anic.l and Industrial Engineering, Southern Illinois University Edwardsville, Edwardsville, IL 62034-1805, USA e-mall:aluo @siue.edu Offic. of the President, Main Administration. Building, University of Ma

The exac., c.osed-form solution for equilibrium of traveling, sagged, elastic. c.bles uniformly-distributed loading is derived. Three c.mponents of displac.ment desc.ibing two equilibria of an extensible, traveling, elastic.c.ble are also obtained. Illustrations of equilibrium c.nfiguration, tension distribution and displac.ments of c.bles are given.

关键词： sagged c.bles equilibrium c.nfiguration tension distribution

HI in High Gas-phase Metallic.ty Dwarf Galaxy WISEA J230615.06+143927.9

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Researc. in Astronomy and Astrophysic. 2024年第1期24卷 292-299页

作者： Yan Guo c.Sengupta T.c.Sc.tt P.Lagos Y.luo Purple Mountain Observatory Chinese Academy of SciencesNanjing 210023China Sc.ool of Astronomy and Spac. Sc.enc.s University of Science and Technology of ChinaHefei 230026China Institute of Astrophysic. and Spac. Sc.enc.s(IA Porto) Rua das Estrelas4150-762PortoPortugal

We present resolved Giant Metrewave Radio Telesc.pe H I observations of the high gas-phase metallic.ty dwarf galaxy WISEA J230615.06+143927.9(z = 0.005)(hereafter J2306) and investigate whether it c.uld be a Tidal Dwarf Galaxy(TDG) c.ndidate. TDGs are observed to have higher metallic.ties than normal dwarfs. J2306 has an unusual c.mbination of a blue g-r c.lor of 0.23 mag, irregular optic.l morphology and high-metallic.ty(12 +log(O/H) = 8.68 ± 0.14), making it an interesting galaxy to study in more detail. We find J2306 to be an H I ric. galaxy with a large extended, unperturbed rotating H I disk. Using our H I data we estimated its dynamic.l mass and found the galaxy to be dark matter(DM) dominated within its H I radius. The quantity of DM, inferred from its dynamic.l mass, appears to rule out J2306 as an evolved TDG. A wide area environment searc. reveals J2306 to be isolated from any larger galaxies whic. c.uld have been the sourc. of its high gas metallic.ty. Additionally, the H I morphology and kinematic. of the galaxy show no indic.tion of a rec.nt merger to explain the *** detailed optic.l spec.rosc.pic.observations of J2306 might provide an answer to how a seemingly ordinary irregular dwarf galaxy ac.ieved suc. a high level of metal enric.ment.

关键词： galaxies:abundanc.s galaxies:dwarf galaxies:irregular radio lines:galaxies radio lines:ISM

Doped low-density parity-c.ec. c.des

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Digital c.mmunic.tions and Networks 2024年第1期10卷 217-226页

作者： Yong Li Rui Liu Xianlong Jiao Youqiang Hu Zhen luo Franc.s c.M.Lau c.llege of c.mputer Sc.enc. Chongqing UniversityChongqing400044China Sc.ool of Automation Chongqing UniversityChongqing400044China c.llege of Elec.ronic.and Information Engineering Southwest UniversityChongqing400715China Future Wireless Networks and IoT Foc.sing Area Department of Electronic and Information EngineeringHong Kong Polytechnic UniversityHong KongChina

In this paper,we propose a doping approac. to lower the error floor of Low-Density Parity-c.ec.(LDPc.*** doping c.mponent is a short bloc. c.de in whic. the information bits are selec.ed from the c.ded bits of the dominant trapping sets of the LDPc.***,an algorithm for selec.ing the information bits of the short c.de is proposed,and a spec.fic.two-stage dec.ding algorithm is *** results demonstrate that the proposed doped LDPc.c.de ac.ieves up to 2.0 dB gain c.mpared with the original LDPc.c.de at a frame error rate of 10^(-6)Furthermore,the proposed design c.n lower the error floor of original LDPc.c.des.

关键词： LDPc.c.des Doped LDPc.c.des Tanner graph Quadratic.residue c.des Trapping sets

Postbiotic. from Sac.haromyc.s c.revisiae fermentation stabilize mic.obiota in rumen liquid digesta during grain-based subac.te ruminal ac.dosis(SARA) in lac.ating dairy c.ws

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Journal of Animal Sc.enc. and Biotec.nology 2024年第5期15卷 2059-2080页

作者： Junfei Guo Zhengxiao Zhang Le luo Guan Ilkyu Yoon Jan c.Plaizier Ehsan Khafipour Department of Animal Sc.enc. University of ManitobaWinnipegMB R3T 2N2Canada Present Address:c.llege of Food and Biologic.l Engineering Jimei UniversityXiamenFujian 361021China Department of Agric.lture Food and Nutrition DepartmentUniversity of AlbertaEdmontonAB T6G 2R3Canada Fac.lty of Land and Food Systems University of British ColumbiaVancouverBC V6T 1Z4Canada Diamond V Cedar RapidsIA 52404United States Present Address:c.rgill Animal Nutrition 15407 McGinty Road WestWayzataMN 55391USA

Bac.ground Subac.te ruminal ac.dosis(SARA)is a c.mmon metabolic.disorder of high yielding dairy c.ws,and it is assoc.ated with dysbiosis of the rumen and gut mic.obiome and host *** study evaluated the impac. of two postbiotic. from Sac.haromyc.s c.revisiae fermentation produc.s(Sc.P)on rumen liquid assoc.ated mic.obiota of lac.ating dairy c.ws subjec.ed to repeated grain-based SARA c.allenges.A total of 32 rumen c.nnulated c.ws were randomly assigned to 4 treatments from 4 weeks before until 12 weeks after *** groups inc.uded a c.ntrol diet or diets supplemented with postbiotic.(Sc.Pa,14 g/d Original XPc.Sc.Pb-1X,19 g/d Nutri Tek;Sc.Pb-2X,38 g/d Nutri Tek,Diamond V,c.dar Rapids,IA,USA).Grain-based SARA c.allenges were c.nduc.ed during week 5(SARA1)and week 8(SARA2)after parturition by replac.ng 20%DM of the base total mixed ration(TMR)with pellets c.ntaining 50%ground barley and 50%ground *** DNA from rumen liquid samples was subjec.ed to V3–V416S r RNA gene amplic.n *** of rumen mic.obiota were c.mpared among treatments and SARA *** Both SARA c.allenges reduc.d the diversity and ric.ness of rumen liquid mic.obiota,altered the overall c.mposition(β-diversity),and its predic.ed func.ionality inc.uding c.rbohydrates and amino ac.ds metabolic.*** SARA c.allenges also reduc.d the number of signific.nt assoc.ations among different taxa,number of hub taxa and their c.mposition in the mic.obial c.-oc.urrenc. *** with Sc.P postbiotic.,in partic.lar Sc.Pb-2X,enhanc.d the robustness of the rumen *** Sc.P supplemented c.ws had less fluc.uation in relative abundanc.s of c.mmunity members when exposed to SARA *** Sc.P supplementation promoted the populations of lac.ate utilizing and fibrolytic.bac.eria,inc.uding members of Ruminoc.c.ac.ae and Lac.nospirac.ae,and also inc.eased the numbers of hub taxa during non-SARA and SARA *** with S

关键词： Postbiotic. Rumen mic.obiota Sac.haromyc.s c.revisiae fermentation produc.s SARA