简介:摘要:停车换乘模式(P&R)通过在轨道站点周边设置停车设施,从而鼓励转乘公共交通出行,是现阶段缓解城市拥堵的重要手段。文章创新性的从停车换乘设施的经济可行性的角度分析了制约P&R模式发展的因素,提出适合的设施类型和支持政策。分析了停车场类型、设施利用率、配建比例、收费价格、土地价格、差异化的政策支持这6个因素对停车换乘设施的经济运行指标的影响。研究显示,在没有政策支持下,地下两层停车场的内部收益率高和回收期短。减低土地成本和对单次停车予以补贴的政策能够提高设施的内部收益率和降低回收期。
简介:目的评价P波间期对阵发性房颤射频消融术后复发的影响.方法100例药物治疗无效的症状性阵发性房颤患者,在EnsiteVelocity三维标测系统指导下行环肺静脉前庭线性消融,消融终点为肺静脉电隔离.结果术中肺静脉隔离率100%.术后随访(14.0±5.5)个月,其中72例成功维持窦性心律(窦律维持组),28例复发(复发组).复发组最大P波间期及P波离散度均较窦律维持组明显延长[最大P波间期:(138±16)mm比(126±14)mm,P波离散度:(58±21)mm比(49±15)mm],两组差异有统计学意义.结论阵发性房颤射频消融术前标准体表12导联心电图(ECG)所测的最大P波间期及P波离散度可预测术后复发.
简介:让b=(b_1,···,b_m),b_i∈Λ_(β_i)(R~n),1≤i≤m,0<β_i<β,0<β<1,[b,T]f(x)=∫_(R~n)(K是aCalderon-Zygmund的b_1(x)-b_1(y))···(b_m(x)-b_m(y))K(x-y)f(y)dy,核。在这篇论文,我们显示出那[b,T]从L~p(R~n)toF_p~被围住(β,∞)(R~n),以及[b,从L~p(R~n)的I_α]到F_q~(β,∞)(R~n),在哪儿1/q=1/p-α/n。
简介:ChinaandtheU.S.haveinitiatedaseriesofbilateralandmultilateralactionstodealwiththeNorthKoreannuclearcrisis.Inthelong-term,bilateralcooperationwilldependonPyongyang’sactions,U.S.attitudeonthenuclearissue,NorthKorea’spositioninChina’sgrandstrategyaswellasthebalancebetweenSino-U.S.strategiccompetitionandcooperation.
简介:Inaviewofnaturalconditionsofestablishingnaturereserve,anindexsystemwaspreparedforquantitativeassessmentonstatusofendangeredspecies,andthusdegreeofendangeredspeciesinTibetwasevaluated.Takingasub-ecozoneasbasicunit,top5animalsand1plantwithhighEaswellasthenumberofspeciesineachunitwereenumerated;andthedegreeoflandutilizationwasfiguredout.Afterward,weselected6coefficients,assignedweight,andframedformulatoreckonproportionofnaturereserve,thusanareaofnaturereserveineachsub-ecozonewasobtained.In5schemesofweightassignment,aschemewithmediumareaofnaturereservewasselected.Allsub-ecozoneswereclassifiedinto4gradespriorconservation,1wasingradeA,2ingradeB,2ingradeC,and11ingradeD.Totalplannedareawasapproximately365135km2,about48834km2smallerthantheactualareaof413969km2,ratioofnaturereserveinTibetdiminishesfrom34.4%to30.38%.Basedon3factorsofhumandisturbance,ratioofbuffer-experimentalzoneinproposednaturereservewascalculated.Itwasdemonstratedthatexistingsizeofnaturereservesisexcessiveonthewhole,andtheirdistributionisnotreasonableentirely.Thesizeofnaturereservesin3sub-ecozonesofnorthernChangtangshoulddecrease,anddecrementofareaisapportionedamongother13sub-ecozoneswhichshouldincreasenaturereserve.HeterogeneityofregionaldistributionofrarespeciesinTibetisquiteobvious,soproposedareadistributionofnaturereservesismorescatteredthantheexisting.
简介:Theliberationofwomenisthehistoricalprocessinwhichwomenhavestrivenforgenderequality,freedomfromoppression,confinementanddiscrimination,andarebecomingthemastersofthesocietyandtheirowndestinies.Accordingtothediversityinhistoryandthestate,theprocesscanbedividedintoaserialofcorrelatedphases,witheachphasefocusingondifferentissues.SexismorderinChinahadremainedstableinthetraditionalsocietyforcenturiesthroughasetofinstitutions.Womenhadbelievedinasexualorderandtherulesofpropriety,whichadvocatedthatmenweresuperiortowomen.AfterthePeople’sRepublicofChinawasfoundedin1949,women’srightsinpolitics,economy,society,andevenfamilywererecognizedandsecuredbytheConstitutionandlawsjustasmen’sduringashortperiod.Women’sliberationinChinahasmadeasignificantprogress.
简介:LetL=L0+VbethehigherorderSchrdigertypeoperatorwhereL0isahomogeneousellipticoperatoroforder2mindivergenceformwithboundedcoefficientsandVisarealmeasurablefunctionasmultiplicationoperator(e.g.,including(-?)m+V(m∈N)asspecialexamples).Inthispaper,assumethatVsatisfiesastronglysubcriticalformconditionassociatedwithL0,theauthorsattempttoestablishatheoryofHardyspaceHpL(Rn)(0<p≤1)associatedwiththehigherorderSchrdingertypeoperatorL.Specifically,wefirstdefinethemolecularHardyspaceHpL(Rn)bytheso-called(p,q,ε,M)moleculeassociatedtoLandthenestablishitscharacterizationsbytheareaintegraldefinedbytheheatsemigroupe-tL.