简介:9,10-Phenanthrenequinone(PQ)andbenzilareimportantα-diketones.ThismanuscriptexplainsthefirstcomparisonofPQandbenzilmolecularproperties.Wehaveused1HNMR,13CNMR,1H-1HCOSY,HMBC,HMQC,UV-Visabsorptionandemission,CVandTGAexperimentstostudyPQandbenzilthatprovidedthefollowingnovelresults.(1)The1HNMR(CDCl3)ofPQshowδ8.19(H1),8.02(H4),7.72(H3),7.47(H2)insteadofanearlierreportedδ8.25(H4),8.08(H1),7.80(H2),7.55(H3);(2)inthe13CNMR(CDCl3),theC9/C10(C=O)signalofPQappearsupfield(δ180.3)comparedtoC9/C10(C=O)signalofbenzil(δ194.5),whichshowshigherelectrophiliccharacter(moreattractivefornucleophiles)ofC9/C10(C=O)ofbenzil;(3)thefirstλmaxfortheUV-VisabsorptionandemissionofPQareblue-shiftedcomparedtobenzildespiteincreasedconjugationattributedtothedifferentsymmetries(C2vforPQandC2hforBenzil)ofthetwomolecules;(4)theemissionspectrumofbenzilisbroadercomparedtothatofPQduetoslowerrelaxationoftheexcitedstate;(5)TheCVstudyshowsthatPQandbenzilaregoodelectronacceptorsandPQshowsabetterreductionprocessthanbenzilduetoanextraringthatprovidesstabilityforthereducedspecies(monoordiradicalanions);(6)TGAshowsthehigherthermalstabilityofPQthanbenzilattributedtothepresenceofphenanthreneunitinPQ.
简介:WejoinedtheSEASTAR(ShellEvolutionAndSearchfor2+energiesAtRIBF)collaborationatRIKENandareanalyzingthedataofn-richVandMnisotopeswithN40.Three-raysineachof63;65;67Mnareidentified.The??coincidencerelationshipsarebeinganalyzedforestablishingtheirlevelschemes.TheprogressinthedataanalysisispresentedinRef.[1].
简介:针对多目标0-1规划问题,首先基于元胞自动机原理和人工狼群智能算法,提出一种元胞狼群优化算法,该算法将元胞机的演化规则与嚎叫信息素更新规则、人工狼群更新规则进行组合,采用元胞及其邻居来增强搜索过程的多样性和分布性,使人工头狼在元胞空间搜索的过程中,增强了人工狼群算法的全局搜索能力,并获得更多的全局非劣解;其次结合多目标0-1规划模型对元胞狼群算法进行了详细的数学描述,定义了人工狼群搜索空间、移动算子、元胞演化规则和非劣解集更新规则,并给出了元胞狼群算法的具体实现步骤;最后通过MATLAB软件对3个典型的多目标0—1规划问题算例进行解算,并将解算结果与其它人工智能算法的结果进行比较,结果表明:元胞狼群算法在多目标0-1规划问题求解方面可获得更多的非劣解集和更优的非劣解,并具有较快的收敛速度和较好的全局寻优能力。
简介:Tomeettherequirementoflong-timeacquisitionwithoutinterruptionsfortheplannednucleardecayexperimentsatCSRe,anewdataacquisitionsystemhasbeensuccessfullydevelopedin2016.DuringthebeamtimeinDec.2016,ournewsystemhasbeenrunningstablywithoutanyproblemsandcontinuouslyacquiringhundredsofdatawithoutanybreaks.Thewholesystemisbasedonaspectrumanalyzer(R&SFSVR7)andanIQrecorder(R&SIQR100).BothofthemareconnectedtoaserverviaEthernet.Thespectrumanalyzeracquiresthetime-domaininformationinthefrequencyrangeofinterestfromtheSchottkyresonator.TheIQrecordercollectstheinformationfromtheanalyzerandpacksitintodata.Oncethedatahavebeenentirelytransferredtotheserver,itwillimmediatelyberemovedfromIQrecorder.Thehigh-volumesolid-statedrive(1TB)ofIQrecorderallowsforavirtuallyunlimitedsizeofacquiredlestobestoredinpractice.Besides,inordertobypasstheunreliabletriggersystemofIQrecorder,webuiltanindependenttriggersystemwithamicrocontroller(ArduinoYun)totranslatetheTTLsignaltonetworkcommands.
简介:研究'右行左超车'规则在高速公路不同交通负荷下对通行能力及安全性的影响。引入超车欲望值及状态改变率的概念,基于交通流元胞自动机模型,建立了'右行左超车'规则下的单向双车道和三车道换道规则及相应的超车规则。选取5个评价参数,针对两车道模型,将'右行左超车'规则与无规则下的换道超车对交通效率与安全表现的影响进行对照试验。试验结果表明:在安全表现方面,低负荷状态下'右行左超车'规则较无规则情形要差,而在高负荷状态下,该规则较无规则情形好;在通行能力方面二者差别不大;试验结果还表明,无论是有规则还是无规则,提高车道的最大与最小限速不仅可以提升道路的通行能力,而且可以提升安全性。最后分析了模型的优缺点,并指出了改进的方向。
简介:6,9,11-Trihydroxy-6a,12a-dehydrorotenoid1(coccineoneB)wassynthesizedfrom2-hydroxybenzaldehyde2andphloroglucinol.
简介:Thestudyofnucleonresonanceisanimportanttopicinhadronphysics.Themostimportantwaytostudythenucleonresonancesisthecollisionofthephotonandnucleon.Uptonow,theknowledgeaboutthenucleonresonancesaround2GeVisstillscarce.Recently,theCLASCollaborationatJeffersonNationalAcceleratorFacilityreleasedtheirexclusivephotoproductioncrosssectionsfortheΛ(1520),Σ0(1385)andΛ(1405)forenergiesfromnearthresholduptoacenterofmassenergyWof2.85GeVwithlargerangeoftheKproductionangle[1].SincethethresholdforthephotoproductionofΛ(1520)isabout2.01GeV,thenewexperimentaldatawithhighprecisionreleasedbytheCLASCollaborationprovideanopportunitytostudythenucleonresonancesabove2GeV.
简介:PhasescanapplicationisveryimportantsoftwareforADSLinacbeamtuning.Thescan/measuretoolsinOpenXALwasusedpreviously.Inordertoimprovethescanningefficiency,anewphasescanapplicationwasdeveloped.ThePythonwasselectedastheprogramminglanguagetomakethedevelopmenteasier.