简介：

简介：根据实际应用需求,设计了一种X波段宽带圆波导耦合器。通过理论计算与数值模拟优化,实现频率9.3GHz时,耦合度约为一71.2dB;频率范围为9～10GHz时,耦合曲线平坦度小于0.3dB,可显著降低微波功率测量不确定度。为了提高耦合器的功率容量,对结构进行了改进,在耦合孔处进行了倒圆角处理。倒圆角半径为1mm时,耦合孔最高场强降低了52%,功率容量得到提高。

简介：我们在超流体3He-B经历Zitterbewegung，，自由相对论的迪拉克的电子。期望价值quasiparticle放，以及旋转被获得并且与迪拉克的电子的相比。特别地，Bogoliubov的quasiparticle的Zitterbewegung有约105比一个电子的降低的频率，显示更有希望的试验性的观察。

简介：Inthispaper,weshowthatnewmodifieddoublecosinetrigonometricsumsintroducedin[1]areinappropriate,theclassofdoublesequencesJdintroducedthereisunusableforsuchsumsandconsequentlytheresultsobtainedinitarecompletelyincorrect.WehereintroduceappropriatemodifieddoublecosinetrigonometricsumsmakingtheclassJdusableconsideringaparticulardoublecosinetrigonometricseries.

简介：Inthispaper,weestablishtheLp(Rn+1)boundednessforthecommutatorsofsingularintegralsassociatedtosurfacesofrevolution,{(t,φ(|t|)):t∈Rn},withroughkernels?∈L(logL)2(Sn-1),ifφ(|t|)=|t|.

简介：Inthispaper,thecycle’sstructureofembeddedgraphsinsurfacesarestudied.Accordingtothemethodoffundamentalcycles,thesetC(Ccontainsallshortest)isfound.AundirectedgraphGwithnverticeshasatmostO(n5)manyshortestcycles;IftheshortestcycleofGisoddcycle,thenGhasatmostO(n3)manyshortestcycles;IfGhasbeenembeddedinasurfaceSg(Ng,gisaconstant),thenithasatmostO(n3)shortestcycles,moreover,iftheshortestcycleofGisoddcycle,then,GhasatmostO(n2)manyshortestcycles.WecanfindacyclebaseofG,thenumberofoddcyclesofG,thenumberofevencyclesofG,thenumberofcontractiblecyclesofG,thenumberofnon-contractiblecyclesofG,arealldecided.IftheΠ-embeddedgraphGhasΠ-twosidedcycles,then,CcontainsashortestΠ-twosidedcycleofG,thereisapolynomiallyboundedalgorithmthatfindsashortestΠ-twosidedcycleofaΠ-embeddedgraphG,thenewandsimplesolutionsabouttheopenproblemofBojanMoharandCarstenThomassenareobtained.

简介：我们为Davey-Stewartson系统学习发作答案(D-S系统，为短)在L<潜水艇class=“a-plus-plus”>x<啜class=“a-plus-plus”>2(<啜class=“a-plus-plus”>2)。首先，我们给D-S系统的解决方案的非线性的侧面分解。然后，我们证明最小的集体发作答案的存在。由使用最小的集体发作答案的特征，最后，我们获得限制侧面和L的精确集体的集中<啜class=“a-plus-plus”>D-S系统的2个发作解决方案。

简介：在偏序度量空间中,获得了一些耦合随机不动点定理,引入F-g-不变集新定义,减弱了F的混合g-单调性,所得结果也是近期文献相关结果的推广.

简介：用氟化钙凸透镜将钬激光器输出激光耦合进大芯径光纤传输，测量了耦合后激光能量、脉冲宽度和重复频率。将该实验用于实际教学，激发学生的实验积极性，深化学生对激光原理及应用的理解，提高学生的动手能力。

简介：.Thesingle2dilationorthogonalwaveletmultipliersinonedimensionalcaseandsingleA-dilation（whereAisanyexpansivematrixwithintegerentriesand｜detA｜=2）waveletmultipliersinhighdimensionalcasewerecompletelycharacterizedbytheWutamConsortium（1998）andZ.Y.Li,etal.（2010）.Butthereexistnomoreresultsonorthogonalmultivariatewaveletmatrixmultiplierscorrespondingintegerexpansivedilationmatrixwiththeabsolutevalueofdeterminantnot2inL2（R2）.Inthispaper,wechoose2I2=（2002）asthedilationmatrixandconsiderthe2I2-dilationorthogonalmultivariatewaveletY={y1,y2,y3},（whichiscalledadyadicbivariatewavelet）multipliers.Wecallthe3×3matrix-valuedfunctionA（s）=[fi,j（s）]3×3,wherefi,jaremeasurablefunctions,adyadicbivariatematrixFourierwaveletmultiplieriftheinverseFouriertransformofA（s）（cy1（s）,cy2（s）,cy3（s））？=（bg1（s）,bg2（s）,bg3（s））？isadyadicbivariatewaveletwhenever（y1,y2,y3）isanydyadicbivariatewavelet.Wegivesomeconditionsfordyadicmatrixbivariatewaveletmultipliers.TheresultsextendedthatofZ.Y.LiandX.L.Shi（2011）.Asanapplication,weconstructsomeusefuldyadicbivariatewaveletsbyusingdyadicFouriermatrixwaveletmultipliersandusethemtoimagedenoising.

简介：SmallRNA(sRNA)-mediatedpost-transcriptionalregulationdiffersfromprotein-mediatedregulation.Throughbasepairing,sRNAcanregulatethetargetmRNAinacatalyticorstoichiometricmanner.Sometheoreticalmodelswerebuiltforcomparisonoftheprotein-mediatedandsRNA-mediatedmodesinthesteady-statebehaviorsandnoiseproperties.ManyexperimentsdemonstratedthatasinglesRNAcanregulateseveralmRNAs,whichcausescrosstalkbetweenthetargets.Here,wefocusonsomemodelsinwhichtwotargetmRNAsaresilencedbythesamesRNAtodiscusstheircrosstalkfeatures.Additionally,thesequence-functionrelationshipofsRNAanditsroleinthekineticprocessofbase-pairinghavebeenhighlightedinmodelbuilding.

简介：Byusingsequentiallylowercompletespaces(see[Zhu,J.,Wei,L.,Zhu,C.C.:Caristitypecoincidencepointtheoremintopologicalspaces.J.AppliedMath.,2013,ID902692(2013)]),wegiveanewversionofvectorialEkeland’svariationalprinciple.Inthenewversion,theobjectivefunctionisdefinedonasequentiallylowercompletespaceandtakingvaluesinaquasi-orderedlocallyconvexspace,andtheperturbationconsistsofaweaklycountablycompactsetandanon-negativefunctionpwhichonlyneedstosatisfyp(x,y)=0iffx=y.Here,thefunctionpneednotsatisfythesubadditivity.FromthenewEkeland’sprinciple,wededuceavectorialCaristi’sfixedpointtheoremandavectorialTakahashi’snon-convexminimizationtheorem.Moreover,weshowthattheabovethreetheoremsareequivalenttoeachother.Byconsideringsomeparticularcases,weobtainanumberofcorollaries,whichincludesomeinterestingversionsoffixedpointtheorem.

简介：Weprovideanalyticalsolutionstotheproblemsofacircularbendingofabeaminplanestrainandthetorsionofanon-circularcross-sectionbeam,thebeamsobeyingasecond-gradientelasticitylawproposedbytheauthor,followingaprevioussuggestionofdell'Isolaetal.(2009).Themotivationwastofindbenchmarkanalyticalsolutionsthatcanservetograspthephysicalfoundationsofsecondgradientelasticitylawsforheterogeneousmaterials.TheanalyticalsolutionofthecircularbeamproblempresentstheadditionaladvantagetoestablishsomenicepropertiesontheunknownsecondgradientelasticmoduliintroducedbyEnakoutsa(2014)modelandtheclassicalelasticityconstantsforbothincompressibleandcompressibleheterogeneouselasticmaterials.Aframeworktofindtheelasticmoduliofthenewmodelisalsoproposed.

简介：现在的工作被奉献给在冻结的magnetar赋予以对一个电场直角的一个极端强壮的磁场的外壳中演变的波色子的学习，两个都由周期的功能描述了。我们沿着盎士通过一个维的潜在的障碍讨论量通道过程。KleinGordon方程的答案以Mathieu为可计算出来的粒子的精力范围，正在转弯从的功能被表示对指数地沿着盎士种模式摆动。在JeffreysWentzelKramersBrillouin框架以内，传播系数在不稳定性范围的中间为粒子动量被计算。

简介：

简介：本文研究了不完备偏好序下乘积空间上的序关系,并由此得到了在没有任何连续性条件下混合单调算子的广义耦合不动点存在定理.

简介：Inagasturbineenginecombustor,highlyswirlingcombustionisusuallyadoptedtostabilizeflameandreducepollutantemissions.Swirlcup,asanairblastatomizer,iswidelyusedtoprovideauniformpresentationoffueldropletstothecombustordome.Thispaperinvestigatedtheeffectofsecondaryswirlerontheflowfielddownstreamoftheswirlcupusingparticleimagevelocimetry(PIV).Threeswirlcups’non-reactingflowfieldwerestudied:caseA,BandCwithsecondaryswirlervaneangle53°,60°and68°respectively.Detailedmeanandtransientvelocitiesandvorticityinthecenterplanewereobtained.FromthePIVresults,asharpcontrastflowfieldwasobtainedforcaseAtoothertwocasesduetothelowersecondaryswirlingintensity.TherecirculationzoneiscollapsedindisorderforthecaseA.Ignitiontestsofthethreecupswerecompletedinasinglecupcombustor.Ingeneral,theignitionperformanceincreaseswiththeincreasingofthesecondaryswirlingintensity.ForcaseA,theignitionperformanceisveryunstableandhasmuchrandomnessandthereisnoclearleanignitionboundarycanbegenerated.Thisworkcanfurtherunderstandtheswirlbehaviorandignitionmechanism.

简介：本文在L_p（1≤p〈∞）空间上,研究了种群细胞增生中一类具扰动项的一般边界条件下的L-R模型,给出了这类模型相应的迁移方程解的渐近行为等结果.

简介：样品用盐酸-硝酸-氢氟酸-高氯酸密闭分解,加入硫酸至冒烟,冷却后制备成硝酸介质溶液,使用电感耦合等离子体质谱（ICP-MS）法测定La,Ce,Pr,Nd,Sm;用过氧化钠熔融分解,水提取沉淀分离,沉淀用硝酸溶解,使用ICP-MS法测定Y,Eu,Gd,Tb,Dy,Ho,Er,Tm,Yb,Lu。根据岩石标准物质的分析结果评价方法的准确度和精密度。方法检出限（6σ）为0.002~0.021μg/g,相对标准偏差（n=12）为1.2%~9.6%,方法可用于批量岩石中稀土元素的测定。

简介：Wehavefoundthattheexcitedenergyfromthegroundstatewith1f7=2configurationtothefirstexcitedstatewith2p3=2configurationin37SisobviouslylowercomparedwiththatinnearbyN=21isotones35Si,39Arand41Ca(seeFig.1,Theinsertindicatestherelevantsingle-particleorbitsofprotonandneutron).ThisinterestingphenomenonmayresultfromthecollapseofN=28closure,whichgivesthesufficientvalencespaceforcollectivedeformationwhichcanbeenrevealedfromtheB(E2)value.Therefore,toobtaintheB(E2),weperformtheexperimentsformeasuringthelifetimeofthefirstexcitedstatein37S.