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简介：LargescaleQCDMonteCarlocalculationshavetypicallybeenperformedoneithercommercialsupercomputersorspeciallybuiltmassivelyparallelcomputerssuchasFermilab'sACPMAPS.Commodityclustersequippedwithhighperformancenetworkingequipmentpresentanattractivealternative,achievingsuperiorperformancetopriceratiosandofferingclearupgradepaths.WedescribetheconstructionandresultstodateofFermilab'sprototypeproductioncluster,whichconsistsof80dualPentiumⅢsystemsinterconnectedwithMyrinetnetworkinghardware.Wedescribesoftwaretoolsandtechniqueswehavedevelopedforoperatingsysteminstallationandadministration.WediscusssoftwareoptimizationsusingthePentium'sbuilt-inparallelcomputationfacilities(SSE),Finally,wepresentshortandlongtermplansfortheconstructionoflargerfacilities.

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简介：TheCQCisanindependentandimpartialqualitycertificateorganizationwiththirdpartystatusestablishedbytheStateImportandExportCommodityInspectionAdministration(SCIA)inaccordancewiththeLawofCommodityInspectionandgranteditsdutiesandobligationsbytheStateCouncil.Themainaspectsofitsdutiesandobligationsinclude:implementingthecertificationofimportcommoditysafetyandquality;thecertificationofthequalitycontrolsystemandtheenvironmental

简介：Researchsituationofeco-designisanalyzed,andthenthoughtsandmethodsofeco-designarediscused.Theeco-designincludespackagingmodularization,dematerialization,energy-savingandbio-simulation.

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简介：ThisarticleanalyzesthefactorsshapingcommercialtimberprofitdistributioninChina’sSouthernCollectiveForestRegion(hereinafterSCFR).Thearticlefirstdescribesthesettinganddistributionofanationalharvestquotaandanalyzesitsequityimpactsonfarmerhouseholds.Basedonaccessmappingofthecommercialtimbercommoditychain,profitdistributionandmechanismsforcontrollingandmaintainingaccesstoprofitareanalyzedfordifferentactorsalongthechain.Thedatashowthatfarmersdonotbenefittoagreatextentfromthecommerce,eveniftheyareendowedwithrightstomanageandharvestforestsandfreelysellcommercialtimberintheregion.Thereareanumberofinstitutionalandnon-institutionalfactorsthatdeterminetheextentofbenefitsfarmersandotheractorsalongthetimbercommoditychaincanseek.Undercurrentarrangements,thedevolutionofforestpropertyintheSCFRdoesnotensurethatfarmerhouseholdsbenefitfromcommercialtimbermarketing.Inordertostimulatefarmers’enthusiasmforforestrehabilitationandmanagement,beyondthedevolutionofforestproperty,itisfirstlynecessarytotakeeffectivemeasurestoimprovefarmeraccesstocommercialtimberprofits.

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