简介：自我介绍和X1一样基于前驱平台打造的SUV,车体略小,却更具有轿跑气质奔驰的入门级SUV产品,基于MFA前驱平台打造,早已由北京奔驰负责国产尺码长4379毫米,宽1824毫米,高1560毫米,轴距为2670毫米长4449毫米,宽1804毫米,高1535毫米,轴距为2699毫米动力引入国内的车型入门款采用前轮驱动,搭载1.5T直列3缸涡轮增压汽油机,最大功率为140马力,峰值扭矩为220牛·米,匹配7挡双离合变速箱;2.0T发动机最大功率为192马力,峰值扭矩为280牛·米,前驱车型上和7挡双离合变速箱匹配,四驱车型上和8挡自动变速箱匹配

简介：摘要：辣椒的产量及品质的高低除受本身的遗传和生理特性影响外，还受栽培地区气候、土壤和栽培条件的影响，其中肥料的影响很大。通过辣椒“2+X”肥效试验，摸清其需肥规律和施肥方法。试验结果初步表明：辣椒栽培中，在土质、品种、种植密度、田间管理、病虫草害防治等基本一致状况下，不同的施肥量和不同的施肥方法，对辣椒农艺经济性状和产量具有较大的影响。

简介：与更大的秒顺序非线性发现材料，有GeS_2的各种各样的比率的Ge-P-Schalcogenide眼镜:P_2S_5被melt-准备--熄灭方法。这些眼镜的微观结构和光学性质被XRD描绘，拉曼，Vis-NIR光谱学并且。制造者穗技术。第二泛音代(SHG)在被归功于到热应力坡度，and/或微各向异性的缺点的同样准备的锕系元素硫族元素化合物眼镜里被观察(例如孤独对轨道或原子价选择对)比较喜欢--同样准备的眼镜的取向。

简介：Thepotentialenergycurves(PECs)ofBOmolecule,includingΣ+andΠsymmetrieswithdoubletspinmultiplicities,areobtainedemployingmulti-referenceconfigurationinteraction(MRCI)methodandDunning'scorrelationconsistentbasissets.Theanalyticalpotentialenergyfunctions(APEFs)arefittedusingtheMurrell-Sorbie(MS)functionandtheleastsquaremethod.BasedonthePECs,thespectroscopicconstantsofthestateshavebeendeterminedandcomparedwiththetheoreticalandexperimentalresultsavailabletoaffirmtheaccuracyandliabilityofthecalculations.Theroot-mean-square(RMS)errorsbetweenthefittedresultsandtheabinitiovaluesaretoolittleincomparisonwiththechemicalaccuracy(349.755cm-1).ItisshownthatthepresentAPEFsareaccurateandcandisplaytheinteractionbetweentheatomswell.ThepresentAPEFscanbeusedtoconstructmorecomplicatedAPEFordosomedynamicinvestigations.

简介：摘要D2D通信技术是一种终端直通技术种类，在实际应用中能够提高频谱利用效率，降低蜂窝网络运行压力，但是D2D通信技术在实际应用上还存在一定局限性，造成并不能够广泛在蜂窝网络通信中应用。基于中继和多天线技术的D2D通信系统就能有有效解决传统D2D通信技术所存在的局限性问题，本文就对于基于中继和多天线技术的D2D通信性能应用进行分析。

简介：Methetraxate(MTX),aclassicaldihydrofolatereductaseinhibitor,wasasuccessfulclinicalantitumoragent,havingpotentinhibitoryactivitiestoseveralkindsoftumors.Unfortunately,thecancercellkswereeasiertoproduceresistancetoMTXwhichendedinthefailureofchemotherapy.Inordertoovercometheresistanceoftumorcells,anewkindofdihydrofolatereductaseinhibitorscallednonclassicalantifolateincludingtriazines,pyrimidinesandquinazolinesweredesignedandsynthesized.Becauseofthedifferentantitumormechanismsbetweenthetwokindsofcompunds,thecancercellsresistanttoMTXmaystillbesensitivetothenonclassicalantifolate.Accordingtothistheory,somenonclassicalantifolate2,4-diamino-5-methyl-6-(substitutedbenzylamino)quinazolineswiththegeneralstructureshowninFIg.1weresynthesizedandtheirantitumoractivitiesweredeterminedinthisthesis.

简介：ＳｔｕｄｉｅｓｏｎｔｈｅＳｙｎｔｈｅｓｉｓ，ｔｈｅ２Ｄａｎｄ３ＤＱＳＡＲＡｂｏｕｔＬｉｐｏｐｈｉｌｉｃＡｎｔｉｆｏｌａｔｅ２，４Ｄｉａｍｉｎｏ５ｍｅｔｈｙｌ６（ＳｕｂｓｔｉｔｕｔｅｄＢｅｎｚｙｌａｍｉｎｏ）ＱｕｉｎａｚｏｌｉｎｅＣｏｍｐ...

简介：QuantumdynamicscalculationsforthetitlereactionH(2S)+S2(X3-Σg)→SH(X2Π)+S(3P)areperformedbyusingagloballyaccuratedoublemany-bodyexpansionpotentialenergysurface[J.Phys.Chem.A1155274(2011)].TheChebyshevrealwavepacketpropagationmethodisemployedtoobtainthedynamicalinformation,suchasreactionprobability,initialstate-specifiedintegralcrosssection,andthermalrateconstant.Itisfoundnotonlythatthereisareactionthresholdnear0.7eVinbothreactionprobabilitiesandintegralcrosssectioncurves,butalsothatboththeprobabilityandcrosssectionincreasefirstlyandthendecreaseasthecollisionenergyincreases.Theexistenceoftheresonancestructureinboththeprobabilityandcrosssectioncurvesisascribedtothedeeppotentialwell.Thecalculationoftherateconstantrevealsthatthereactionoccurringonthepotentialenergysurfaceoftheground-stateHS2isslowtotakeplace.

简介：

简介：ThespinelLiMn2O4-x(SO4)xcompoundcathodematerialsweresynthesizedbysolid-statereactionofthecalculatedamountsofLiOH·H2O,MnO2andMnSO4.Theresultsoftheelectrochemicaltestdemonstratedthatthesematerialsexhbitedexcellentelectrochemicalproperties.Thehighestreversiblecapacityoftheseseriesofcathodematerialswas-120mAh/g,andafter50cycles,thisreversiblecapacitywasstillaround116mAh/gwithnearly100%reversibleefficiency,whichrevealedthatdopedsulfateioncouldimprovethestructuralstabilityofspinel.

简介：在尤拉等式integralfromn=0to1(dx/(1-x~4)~1/2·integralfromn=0to1(x~2dx/(1-x~4)~1/2=π/4中,我们只要细心观察,就会发现这个等式的左端是两个瑕积分之积,它们仅在被积函数的分子上有细微的一点差别,这就引起我探讨形如integralfromn=0to1(x~2dx/(1-x~4)~1/2的瑕积分的浓厚兴趣。

简介：Poriacocos(Schw.)Wolf,animportantmedicinalandfoodfungus,iswellknowninEastAsia.Duetogrowingmarketdemand,longcultivationperiod,andconsumptionofpinetrunkduringcultivation,developingalternativemethodsforproducingP.cocosand/oritsactivecomponentsisofinterest.Inthepresentstudy,theeffectsofdifferentculturemethodsonbiomassandaccumulationoffourtriterpenoidswereinvestigated.Theethanolextractoffermentedmycelium(EFM)wasorallyadministeredtorats.Urineoutputandconcentrationsofelectrolytes(Na~+,K~+,andCl~-)weremeasured.Ourresultsshowedthatmyceliagrewbetterundercontinuousshakingculturecondition(7.5gDW·L~(-1)),andhighertriterpenoidlevelswereaccumulatedintwo-stageculture(112mg·L-1,2.03%).Theoptimalstartingtimeofstaticculturefortriterpenoidyieldwas4~(th)daftershakingculture.SingleadministrationofmiddleandhighdoseofEFMsignificantlyincreasedurineoutput,Na~+andCl~-excretion,andNa~+/K~+ratio.Theseresultssuggestedthatethanolextractofculturedmyceliashowedsignificantdiureticactivityinratsandtwo-stagecultureofP.cocoscouldbeanalternativewaytoproducemyceliaandtriterpenoids.

简介：Thedipole-length,velocityandaecelerationabsorptionoscillatorstrengthsforthe1s^22p-ls^2nd(3_2=11to20arecalculatedusingtheenergiesandthemulticonfiguratloninteractionwavefunctionsobtainedfromafullcorepluscorrelationmethod.Theagreementbetweenthef-valuescalculatedfromthelength,velocityandaccelerationformulaeisexcellent.Ourresultsagreecloselywiththeexperimentaldataavailableintheliterature.Combiningthesediscreteoscillatorstrengthswiththesingle-channelquantumdefecttheory,thediscreteoscillatorstrengthsforthetransitionsfrom1s^22pstatetohighlyexcitedstates(n_>10)andtheoscillatorstrengthdensitiescorrespondingtothebound-freetransitionsareobtained.

简介：摘要目前，机柜、机架式产品正逐渐成为新的发展趋势，适合机架式产品的开关也就应运而生。与此同时，随着现代商务移动性能的增加，车载、舰载等需要固定设备的系统也迫切需要机架式开关。为此本公司针对用户的上述需求推出了全系列机架式CH-28-D1X2-U开关。

简介：文章首先界定了“N1＋A＋D＋N2”格式的讨论范围，提出了A的语义指向类别，并用“指示代词或数量词插入法”从形式上验证A语义指向的规律性。其次，根据N1与N2的语义关系及其句法结构差异，对格式的类别进行了细致的描写和说明，在语义前指上提出了属体关系、构体关系、喻体关系、逻辑关系四类；在语义后指上提出了领事限定、处所限定和时间限定三类；在语义歧指上提出了同位交叉关系。最后对A的语义前指和后指从双向凸显和双层限制两个角度给予了认知解释。

简介：PhaseShiftingAndLogicalMoire(PSALM)isakindofcomputerimageprocessingmethodwhichcanbeusedinphasemeasurementandtoobtaintheshape,deformationandstraindistributionofanobject.Thispaperpresentsthestructureandworkingprocedureofa2DphasemeasurementPSALM2Dprogramanditsapplication.Whenanalyzingmoireinterferometricfringes,wecanobtain2Ddistributionofdisplacementandstrain.Whenitisusedinreflectionmoirewecanmeasuretheslopeofaspecimen.SatisfactoryvisualizationandquantitativeresultsaregivenbyPSALM2D.

简介：摘要消退素是近年来新发现的内源性促炎症消退介质，消退素D2通过与其受体G蛋白偶联受体18结合产生抗炎及镇痛作用，已在炎症疾病、疼痛疾病、神经系统疾病等领域受到越来越多的重视，且在呼吸系统、消化系统、心血管系统疾病及肿瘤疾病等其他领域显示出良好的应用前景，有望为临床新型药物研制提供一种新的方案。

简介：摘要维生素D作为糖尿病的影响因子已成为近年来研究的新领域和热点。大量的观察性及干预性研究已逐步阐明维生素D与糖尿病之间的关系,并对其作用机制进行了较深入的研究,但仍有很多尚待证明或解决的问题。

简介：Superconvergenceofthemixedfiniteelementmethodsfor2-dMaxwellequationsisstudiedinthispaper.Twoorderofsuperconvergentfactorcanbeobtainedforthek-thNedelecelementsontherectangularmeshes.

简介：DistributionofmetalsonPd-SnO2/D3520catalystsandstateofthecatalystswrerstudiedwithSEM,XRD.TheinteractionbetweenmetalsandsupportorbetweenPdandSnorPbwerestudiedbyIR,XPS.Inaddition,therelationshipoftheactivityforcatalytichydrogenationoftheolefinsandouterlayervalenceelectrondensityofPdwasdiscussed.Theresultsshowedthatthesecatalystshadsuitablesurfacestate,themetalswereuniformlydispersedonthesurfacelayerofthesupport.Therewerenotobviousinteractionbetweenthemetalsandthesupport.TherewasstronginteractionbetweenPdandSn(orPb)inthecatalysts.ThecatalyticactivityforhydrogenationwasrelatedtoouterlayervalenceelectrondensityofPd.