简介：TherapidpopulationgrowthhasbeenamajorproblemofBeijing.Itaffectedontransportation,schoolingandhousing.On26thSeptember2011,BeijingPopulationandFamilyPlanningCommissionannouncedthattheywoulddraftpopulationassessmentprovisions.Governmentpolicieswouldbeissuedaccordingtopopulationplansforassessingtheireffectsonpopulationcontrol.

简介：在这份报纸，我们学习可矫正的水流由subgradient(subdifferential)带了的整数复合一个n维的凸的领域上的半凸的功能的图，和表演关于为如此的水流的pointwise集中的一条弱连续性定理。作为应用，为半凸的功能的Lagrangian水流的结构定理被给，k麻袋布措施以水流由一个不同方法是计算的。

简介：Dustemissionsfromsmelters,asamajorcontributortoheavymetalcontaminationinsoils,couldseverelyinfluencesoilquality.Downwindsurfacesoilswithin1.5kmofazincsmelter,whichwasactivefor10yearsbutceasedin2000,inMaguTown,GuizhouProvince,ChinawereselectedtoexaminePb,Zn,andCdconcentrationsandtheirfractionationalongadistancegradientfromazincsmelter,andtostudythepossiblee?ectsofPb,Zn,andCdaccumulationonsoilmicroorganismsbycomparingwithareferencesoillocatedatadownwinddistanceof10kmfromthezincsmelter.Soilswithin1.5kmofthezincsmelteraccumulatedhighlevelsofheavymetalsZn(508mgkg-1),Pb(95.6mgkg-1),andCd(5.98mgkg-1)withlowratiosofZn/Cd(59.1-115)andPb/Cd(12.4-23.4).Compositepollutionindices(CPIs)ofsurfacesoils(2.52-15.2)were3to13timeshigherthanthereferencesoils.Inmetalaccumulatedsoils,exchangeablepluscarbonate-boundfractionsaccountedformorethan10%ofthetotalZn,Pb,andCd.Thesaturationdegreeofmetals(SDM)insoilswithin1.5kmofthesmelter(averaging1.25)wassixtimeshigherthanthatofthereferencesoils(0.209).Asmallersoilmicrobialbiomasswasfoundmorefrequentlyinmetalaccumulatedsoils(85.1-438μgCg-1)thaninreferencesoils(497μgCg-1),andanegativecorrelation(P<0.01)ofsoilmicrobialbiomasscarbontoorganiccarbonratio(Cmic/Corg)withSDMwasobserved.Microbialconsumptionofcarbonsourceswasmorerapidincontaminatedsoilsthaninreferencesoils,andashiftinthesubstrateutilizationpatternwasapparentandwasnegativelycorrelatedwithSDM(R=-0.773,P<0.01).Consequently,dustdepositedPb,Zn,andCdinsoilsfromzincsmeltingwerereadilymobilized,andweredetrimentaltosoilqualitymainlyinrespectofmicrobialbiomass.

简介：Apioneeringself-optimizingteachingmethodinstudent-centricseminarswasintroducedinthispaper,inwhicheachstudentwillestablishpreferredengineeringdrawingprocessdirectedbyeducatorsandnecessaryprinciples.Wepresentedtheworking-memorycenteredmechanisminmentalaspecttoexplainthephenomena.Thetheoreticalmechanismisbasedonthetypicaltranslationbetweenorthographicprojectionimageandperspectiveimage.Thefirstisbondingobjectintoawholesolid.Thesecondissplicingtheselectedsurfacesofobjectsandtailoredthemtogether.Twostudygroupsweredetermined:anexperimentalgroup,whoweredirectedtocombinetheobject-basedandsurface-basedconstructionmethodsinthepresentations,andacontrolgroup,wholearnedthroughregularpresentationsmadebyanexperiencedteacherduringthesameperiod.Theresultsshowedthatasignificantenhancementinaveragescoreshasbeenachievedinthetestamongtheexperimentalgroupincomparisonwiththecontrolgroup.Thevarianceofthescoresisobviouslyreducedthroughtheself-optimizinglearningstrategy,indicatingasignificantadvantageonfillinguptheabilitygapsamongstudents.Infact,theresultsalsoindicatedthattheeducatordidkeepthelessoninhighquality.Butitisworthyofmoreattentionthatthedifferenceofmentalmanipulationhabitsbetweensomestudentsandeducatormayleadtoapolarizationinscoredistribution.Sotheseminarisapromisingmethodtohelpthestudentstocombinetheobject-basedandsurface-basedconstructionmethods.