简介：Editor'sNote:EversincethefoundingofNewChinaandespeciallysinceChinaimplementedthepolicyofreformand

简介：Chinaismarchingontowardsthe21stcenturywithfullconfidence,andisforgingaheadtowardsthegoalofsocialistmodernization.Neartheturnofthecentury,apieceofsensationalnewswastransmittedfromabroad:"WhowillsupportChinabytheyear2030?"ThisproblemwasputforwardbyMr.Brown,directoroftheAmericanResearchInstituteofWorldObservation,HesaidthatChina’sPopulationisincreasing,itscultivatedlandisdecreasing,sownareasarebeingreducedandwillcontinuetobereduced.Theperunitareayieldisapproachingitsultimate,sothattotaloutputwillcontinuetofall.Bytheyear2030,grainoutputproducedbyChinaitselfwillbereducedto263milliontons,andwillnotmeetthegrainneedsof479milliontonsor568milliontonsor641milliontonsforapopulationof1.6billion(consumptionpercapitaiscountedintermsof300kg,350kg

简介：ThispaperfocusesonstudyingthePoissontheoryandtheintegrationmethodofdynamicsofrelativemotion.Equationsofadynamicalsystemofrelativemotioninphasespacearegiven.Poissontheoryofthesystemisestablished.TheJacobilastmultiplierofthesystemisdefined,andtherelationbetweentheJacobilastmultiplierandthefirstintegralsofthesystemisstudied.Ourresearchshowsthatforadynamicalsystemofrelativemotion,whoseconfigurationisdeterminedbyngeneralizedcoordinates,thesolutionofthesystemcanbefoundbyusingtheJacobilastmultiplierif(2n1)firstintegralsofthesystemareknown.Attheendofthepaper,anexampleisgiventoillustratetheapplicationoftheresults.

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简介：Adatawarehouseoftenaccommodatesenormoussummaryinformationinvariousgranularitiesandismainlyusedtosupporton-lineanalyticalprocessing.Ideallyalldetaileddatashouldbeaccessiblebyresidinginsomelegacysystemsoron-linetransactionprocessingsystems.Inmanycases,however,datasourcesincomputersarealsokindsofsummarydataduetotechnologicalproblemsorbudgetlimitsandalsobecausedifferentaggregationhierarchiesmayneedtobeusedamongvarioustransactionsystems.Insuchcircumstances,itisnecessarytoinvestigatehowtodesigndimensions,whichplayamajorroleindimensionalmodelforadatawarehouse,andhowtoestimatesummaryinformation,whichisnotstoredinthedatawarehouse.Inthispaper,theroughsettheoryisappliedtosupportthedimensiondesignandinformationestimation.

简介：Inhisarticleentitled'BigTroubleBrewingintheHood'publishedatonlineSydneyMorningHeraldonAugust3,2010,ProfessorJohnMearsheimerattheUniversityofChicagoclaimedthat'thebalanceofpowerinAsiaisexpectedtochange

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简介：WefeelagreathonorandaheavyresponsibilityupontheHumanRightsResearchCenteratShandongUniversitybeingnamedoneofChina’snationalhumanrightseducationandtrainingbases.Inourview,nationalhumanrightseducationandtrainingbasesshouldkeepupwiththetimes,bringintofullplaytheiradvantagesofuniquenessandopenness,complementeachother,makeconcertedeffortstoachieveinnovation

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简介：在象滑动泥土，红泥土，和广泛的泥土那样的特殊泥土粒子的水电影的厚度的变化是在生产地质的灾难和地质的环境损坏的一个重要因素。为了减少水的厚度，拍摄，离子的土壤stabilizer(ISS)被用来对待滑动泥土，红泥土，和广泛的泥土。直接砍滑动泥土和收缩的测试，免费胀大红泥土和广泛的泥土的率，希腊语的第六个字母潜力，和阳离子交换能力被执行。结果证明作为特殊黏土减少的塑料索引，滑动泥土的shear力量增加，收缩并且免费胀大红泥土的率和广泛的泥土减少，和水电影的厚度与离子的土壤stabilizer在处理以后变瘦。因此，地质的工程灾难在特殊泥土的水电影的厚度由变化引起了能有效地被禁止。

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简介：Inthispaper,theauthorsconstructaφ-groupfornsubmodules,whichgeneralizestheclassicalK-theoryandgivesmoreinformationthantheclassicalones.Thistheoryisrelatedtotheclassificationtheoryforindecomposablesystemsofnsubspaces.

简介：Althoughnurseryrhymesandothertextsforchildrenofteninvolveimplausibleorevenfantasticcombinationsofelements,childrenseemtohavenotroublefollowingthem.Thepapertriestoaccountforthephenomenoninperspectiveofmentalspacetheory,suggestingthatchildrenareadeptatthesortofmentalprocesscalledasconceptualintegration.

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简介：Theimpactofmutualcouplingontheperformanceofmultiple-inputmultiple-output(MIMO)systemswithcompactantennaarraysisanalyzed.ThisarticleaimstousetheS-parametermodelingapproachtoexaminetheimpactofmutualcouplingonthreesystem-relatedperformancemeasures:antennacorrelation,efficiencyandbandwidth.Itisshownthatimplementingagoodmatchingnetworkcandrasticallyimprovethesystemperformanceinthepresenceofstrongmutualcoupling.Experimentresultsindicatethesuperiorityofcross-shapedantennatodipoleantenna.