网络存储工程 Optimizing server placement in distributed systems in the presence of competitionWord文件下载.docx

网络存储工程 Optimizing server placement in distributed systems in the presence of competitionWord文件下载.docx

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Pre-salesengineer

471articlesfoundfor:

pub-date>

2008andtak（（（Computertheory）or（basicknowledge）or（operatingsystems）orstorageor（Debugnetworkequipment）or（networkfaultanalysis）orjudgmentsorsolving）and（Serverordiskor（arrayproduct）orEMCorHPorIBMorNETAPPor（diskarrayproducts）or"

Pre-sales"

orengineer））

Bifurcationandchaosanalysisofspurgearpairwithandwithoutnonlinearsuspension 

OriginalResearchArticle

NonlinearAnalysis:

RealWorldApplications

Thisstudyperformsasystematicanalysisofthedynamicbehaviorofasingledegree-of-freedomspurgearsystemwithandwithoutnonlinearsuspension.Thedynamicorbitsofthesystemareobservedusingbifurcationdiagramsplottedusingthedimensionlessdampingcoefficientandthedimensionlessrotationalspeedratioascontrolparameters.Theonsetofchaoticmotionisidentifiedfromthephasediagrams,powerspectra,Poincaré

maps,Lyapunovexponentsandfractaldimensionofthegearsystem.Thenumericalresultsrevealthatthesystemexhibitsadiverserangeofperiodic,sub-harmonicandchaoticbehaviors.Theresultspresentedinthisstudyprovideanunderstandingoftheoperatingconditionsunderwhichundesirabledynamicmotiontakesplaceinaspurgearsystemandthereforeserveasausefulsourceofreferenceforengineersindesigningandcontrollingsuchsystems.

ArticleOutline

Nomenclature

1.Introduction

2.Mathematicalmodeling

3.Analyticaltoolsforobservingnonlineardynamicsofspurgearpairsystem

3.1.DynamictrajectoriesandPoincaré

maps

3.2.Powerspectrum

3.3.Bifurcationdiagram

3.4.Lyapunovexponent

3.5.Fractaldimension

4.Numericalresultsanddiscussions

5.Conclusions

AnalysisofthefinitesourceMAP/PH/NretrialG-queueoperatinginarandomenvironment 

AppliedMathematicalModelling

FinitesourceretrialG-queuesaregoodmathematicalmodelsofcommunicationsystemsandnetworks,sotheirinvestigationisimportantfortheoryandapplications.Inthispaper,weanalyzetheMAP/PH/NretrialqueuewithfinitenumberofsourcesandMAParrivalsofnegativecustomersoperatinginafinitestateMarkovianrandomenvironment.Thearrivalofanegativecustomerwithequalprobabilitygoestoanybusyservertoremovethecustomerbeinginservice.Themulti-dimensionalMarkovchaindescribingthebehaviorofthesystemisinvestigated.Thealgorithmsforcalculatingthestationarystateprobabilitiesareelaborated.Mainperformancemeasuresareobtained.Illustrativenumericalexamplesarepresented.

2.Modeldescription

3.Processofthesystemstates

4.Stationarydistribution

5.Performancemeasures

6.Numericalexamples

7.Conclusions

Acknowledgements

References

Molecularthermodynamicsmodelingofequilibriummoistureinfoods 

JournalofFoodEngineering

Moisturecontentinfoodsaffectsmanyaspectsofprocessingandstorage,aswellasqualityandpathologicalactivity.Understandingitsbehaviorisveryimportantinthefoodindustryfordesigningeffectivelong-termfoodmanagementstrategies,inparticulartransportationandstorage.Mostapproachesfoundintheliteraturedealingwithmoistureinfoodsconsistofmeasuringitasafunctionofrelativehumidityandtemperatureandthenfittingthedatatoempiricalorsemi-empiricalmodelsforinterpolationorcorrelationpurposes.Mostsemi-empiricalmodelsaremodificationsofearlygasadsorptionmodelsonhardsurfaces,whichfundamentallyarenotwellsuitedtodescribewaterinsoftermaterialssuchasfoods.Inthiswork,weproposeanduseamoregeneralframeworkbasedonequilibriummolecularthermodynamicstomodelandcorrelateequilibriummoisturecontent（EMC）infoodsthattakesintoaccountothernon-adsorptionphenomenasuchasmixingandswellingofthebiopolymersinfoods.Theframeworkisgeneral,andthecurrentmodelshowsverygoodresultscorrelatingandmodelingEMC.Themodelparametersprovideinsightintothenatureofthewateractivityinfoodproducts,providingpotentiallyusefulinformationforfoodprocessingandmodeling.

1.Introduction

1.1.EMCModelingbackground

2.Methodology

2.1.Helmholtzfreeenergyexpressions

2.2.Chemicalpotentialexpressions

2.3.Equilibriumformulation

3.Resultsanddiscussion

3.1.Riceandpotatoes

3.2.Othersofterfoods

4.Conclusions

Numericalsolutionsforfunctionallygradedsolidsunderthermalandmechanicalloadsusingahigh-ordercontrolvolumefini