简介：

简介：Theequilibriumgeometries,relativestabilities,andelectronicpropertiesofMnAgm(M=Na,Li;n+m≤7)aswellaspureAgn,Nan,Lin(n≤7)clustersaresystematicallyinvestigatedbymeansofthedensityfunctionaltheory.Theoptimizedgeometriesrevealthatfor2≤n≤7,therearesignificantsimilaritiesingeometryamongpureAgn,Nan,andLinclusters,andthetransitionsfromplanartothree-dimensionalconfigurationsoccuratn=7,7,and6,respectively.Incontrast,thefirstthree-dimensional(3D)structuresareobservedatn+m=5forbothNanAgmandLinAgmclusters.Whenn+m≥5,astrikingfeatureisthatthetrigonalbipyramidbecomesthemainsubunitofLinAgm.Furthermore,dramaticodd-evenalternativebehavioursareobtainedinthefragmentationenergies,secondorderdifferenceenergies,highestoccupiedandlowestunoccupiedmolecularorbitalenergygaps,andchemicalhardnessforbothpureanddopedclusters.Theanalyticresultsexhibitthatclusterswithanevenelectronicconfiguration(2,4,6)possesstheweakestchemicalreactivityandmoreenhancedstability.

简介：用构造法研究了路和圈的Mycielski图的点可区别均匀边染色，得到了路和圈的Mycielski图的点可区别均匀边色数，验证了它们满足点可区别均匀边染色猜想（VDEECC）．

简介：为在的盒子象差错为高级放射性的原子废物在一个仓库的近的域里在包围岩石团以内存在一样的大地质的结构，浸透不饱和的无所不在关节的岩石质量的双孔的媒介的一个种联合thermo-hydro-mechanical-migratory模型被建立。在现在的模型，渗出物域和集中域是双的，但是压力域和温度域是集合的单身者，和影响，空格，角度，连续性比率，媒介的组成的关系上的破裂的僵硬能被考虑。同时，有限元素方法的一个二维的节目被开发。拿在是不饱和的一个岩石团定位的一个假想原子浪费仓库是的双孔的媒介一个计算例子，为联合的thermo-hydro-mechanical-migratory的女性的分析在有或没有一个差错，和温度为盒子漏的放射性的核种的条件下面被执行，毛孔压力，流动速度，在岩石团中的核种集中和主要压力被调查。在差错的破裂水流动的结果表演是基本上沿着差错方向，和它的流动速度比在岩石质量中的破裂水的高几乎三个数量级；没有差错，在差错的核种集中也比那高得多，并且核种更快沿着差错移动；而且，差错在岩石团中在毛孔压力和主要压力上有明显的影响。

简介：通过利用K泛函及光滑模、不等式等技巧，在Orlicz空间中讨论了Miintz有理逼近问题，得到了有理逼近的三种估计．

简介：At-hyperwheel(t≥3)oflengthl(orW(t)lforbrevity)isat-uniformhypergraph(V,E),whereE={e1,e2,...,el}andv1,v2,...,vlaredistinctverticesofV=∪eii=1lsuchthatfori=1,...,l,vi,vi+1∈eiandei∩ej=P,j∈/{i1,i,i+1},wheretheoperationonthesubscriptsismodulolandPisavertexofVwhichisdifferentfromvi,1≤i≤l.Inthispaper,theminimumcoveringproblemofMCλ(3,W(3)4,v)isinvestigated.DirectandrecursiveconstructionsonMCλ(3,W(3)4,v)arepresented.Thecoveringnumbercλ(3,W(3)4,v)isfinallydeterminedforanypositiveintegersv≥5andλ.

简介：ConstantineM.Dafermoshasdoneextensiveresearchattheinterfaceofpartialdifferentialequationsandcontinuumphysics.Heisaworldleaderinnonlinearhyperbolicconservationlaws,whereheintroducedseveralfundamentalmethodsinthesubjectincludingthemethodsofrelativeentropy,generalizedcharacteristics,andwave-fronttracking,aswellastheentropyratecriterionfortheselectionofadmissiblewavefans.Hehasalsomadefundamentalcontributionsonthemathematicaltheoryoftheequationsofthermomechanicsasitpertainsinmodelingandanalysisofmaterialswithmemory,thermoelasticity,andthermoviscoelasticity.Hisworkisdistinctlycharacterizedbyanunderstandingofthefundamentalissuesofcontinuumphysicsandtheirroleindevelopingnewtechniquesofmathematicalanalysis.

简介：我们定义m复杂物是矩阵Kn

简介：在这份报纸，当错误形成一个严格地静止的混合序列时，为在一个线性模型的回归参数的M评估者的中等偏差被获得。结果被使用学习象Hubers评估者，Lp回归评估者，最少的广场评估者和最不绝对的偏差评估者那样的M评估者的许多不同类型。

简介：Thefatiguebehaviorofahighstrengthsteel300Minthegigacycleregimewasinvestigated.Fullyreversedtension-compressionfatiguetestsatambienttemperaturewereperformedusinganultrasonicfatiguesystemoperatingat20kHz.Thestaircasetestmethodwasemployedtoobtainaccuratevaluesofthemeanfatiguestrengthcorrespondingtofixednumbersofcyclesupto10~9.Theseresultswerecomparedtothecurvewhichisestimatedbythedatatestedinthemid-longliferegimeonconventionalservohydraulictestmachineat20Hz.Resultsindicatethatthefatiguestrengthdeterminedfromultrasonicfatiguetestingislightlyhigherthanconventionaltestingintherangeof10~6-10~7cycles.Itisobviousthatnucleationsoffracturestendtooccurbelowthesurface,iffractureshappenaftermorethan10~7cycles.AllthefracturedspecimensfailsfrominternalSiO_2inclusionsorsmallercarbidesandcarbideclusters.

简介：DrugsSPD-304(6,7-dimethyl-3-{[methyl-(2-{methyl-[1-(3-trifluoromethyl-phenyl)-1H-indol-3-ylmethyl]-amino}-ethyl)-amino]-methyl}-chromen-4-one)andzafirlukastcontainacommonstructuralelementof3-substitutedindolemoietywhichcloselyrelatestoadehydrogenatedreactioncatalyzedbycytochromeP450s(CYPs).ItwasreportedthatthedehydrogenationcanproduceareactiveelectrophilicintermediatewhichcausetoxicitiesandinactivateCYPs.DrugL-745,870(3-{[4-(4-chlorophenyl)piperazin-1-yl]-methyl}-1H-pyrrolo2,3-β-pyridine)mighthavesimilareffectsinceitcontainsthesamestructuralelement.Weusedmoleculardockingapproachcombinedwithmoleculardynamics(MD)simulationtomodelthree-dimensional(3D)complexstructuresofSPD-304,zafirlukastandL-745,870intoCYP3A4,respectively.Theresultsshowthatthesethreedrugscanstablybindintotheactivesiteandthe3-methylenecarbonsofthedrugskeepareasonablereactivedistancefromthehemeiron.ThecomplexstructureofSPD-304-CYP3A4isinagreementwithexperimentaldata.Forzafirlukast,thecalculationresultsindicatethat3-methylenecarbonmightbethedehydrogenationreactionsite.DockingmodelofL-745,870-CYP3A4showsapotentialpossibilityofL-745,870dehydrogenatedbyCYP3A4at3-methylenecarbonwhichisinagreementwithexperimentinvivo.Inaddition,residuesinthephenylalanineclusteraswellasS119andR212playacriticalroleintheligandsbindingbasedonourcalculations.ThedockingmodelscouldprovidesomecluestounderstandthemetabolicmechanismofthedrugsbyCYP3A4.

简介：以化学沉淀法制备单相的铕离子掺杂硼铝酸盐红色荧光粉YAl3（BO3）4：Eu3＋，考察了焙烧温度、掺铕量等因素对材料性能的影响，用X射线衍射、扫描电镜、激发光谱和发射光谱对荧光粉的结构、形貌和发光性能进行了表征．以尿素为沉淀剂，900℃焙烧沉淀前驱体可得到单相荧光粉YAl3（BO3）4：Eu3＋，反应温度比传统高温固相法降低了300℃；沉淀法制备的荧光粉粒径分布范围小，无团聚现象，粒径约300nm．掺铕量为10％（物质的量比）时发光强度最大．在260nIn的紫外光激发下，Eu3＋的5D0→F72的电偶极跃迁最强，发射光为618nm的红光．

简介：

简介：旗传递t-设计的分类是代数组合学的一个重要课题．本文主要讨论了旗传递5-（v，k，3）设计．由P．J．Cameron和C．E．Praeger的结论可知，此时设计的自同构群是3-齐次群．本文利用3-齐次群的分类，证明了设计的自同构群不能是仿射型群．

简介：

简介：应用数域上（m，l）幂等矩阵与m幂等矩阵的关系，得到了数域上（m，l）幂等矩阵的l次方幂的代数等价、相似和特征多项式相等是互为确定的结论，由此推广改进了数域上m幂等矩阵的代数等价与正交性的相应结果．

简介：

简介：

简介：Theperovskite-typeAgTaO3crystalswerepreparedbymildhydrothermalmethodanddeterminedbypowderX-raydiffraction.RietveldrefinementindicatesthatAgTaO3crystallizedinanorthorhombicsystemwiththespacegroupPcmn.Thelatticeparametersarea=5.5822(1)nm,b=7.8522(2)nmandc=5.5347(1)nm,withα=β=γ=90.0o.Thecompoundwascharacterizedbyscanningelectronmicroscopy(SEM),X-rayphotoelectronspectroscopy(XPS),highresolutiontransmissionelectronmicroscopy(HR-TEM)andUV-Visdiffusereflectancespectrometry(UV-VisDRS).ThephotocatalyticactivityofAgTaO3powderwasevaluatedbythedegradationofCongoredunderUV-lightirradiation.Theresultshowsthatthetitledcompoundhasahighphotocatalyticactivityatroomtemperatureandpotentialapplicationinphotocatalysis.

简介：(N-isopropylacrylamide)(PNIPAM)Poly，microgels广泛地在药交货被使用由于他们对温度的快反应。以便得到更好的biocompatibility，PNIPAMmicrogels与biocompatible材料的层典型地是涂的，与核心壳导致合成microgels结构。例如，在最近准备的合成microgel，PNIPAM胶化的microsphere被phospholipid膜围住，并且合成microgel响应温度变化展出实质的音量转变。这里，我们开发一个理论模型描述这合成microgel的热应答的行为。特别地，我们把phospholipid膜当作象橡皮状的弹性体一样表现的有弹性的层并且为nematic胶化采用免费精力的功能的形式(它指其行为强烈地被学习了的热敏感的胶化的花药种类)作为那为PNIPAM胶化。我们证明合成microgel的热应答的行为能被膜显著地影响。由在接口上调查应力的状态，我们进一步预言当涂层膜生硬、薄时，皱纹被期望在卷转变以后发生在合成microgel的外部表面上。