简介：Animprovedconstrained(IC)steeringlawforsinglegimbalcontrolmomentgyros(SGCMGs)withdeformedpyramidconfiguration(DPC)isproposed.Firstofall,theoriginalsystemwithfivepyramidconfiguration(FPC)whosetwoadjacentgyrosareinfailurestateisreconfiguredasadegradedsystemwithDPC.Then,thesingularangularmomentumhypersurfacesoftheoriginalandthedegradedsystemsareplottedviathesingularangularmomentumequationofSGCMGs.Basedonsingularsurfaces,thedifferencesbetweenFPCandDPCinsingularityandmomentumenvelopeareobtaineddirectly,whichprovideanimportantreferenceforsteeringlawdesignofDPC.Finally,anICsteeringlawisdesignedandappliedtoDPC.ThesimulationresultsdemonstratethattheICsteeringlawhasadvantagesinsimplicityofcalculation,avoidanceofsingularityandexactnessofoutputtorque,whichendowthedegradedsystemwithfinecontrollabilityinarestrictedworkspace.
简介：［1］BASFUSP4479906［2］BASFBP1443541［3］BASFDE3618265［4］WangL.,WuZ.,ChinaLeather,26(8),11,(1997)［5］YuanL.,DinY.,ChineseChemistryBulletin,(2),19(1988)［6］KurokiH.,ChemistryofDyeingTheory(ChineseTranslation),TextileIndustryPress,Beijing,89(1982)［7］WangS.,LiP.,WuZ.DyestuffIndustry(Chinese),34(4),1,(1997)［8］Tian,Y.,Wu,Z.,Wang,G.,Zhang,S.J.ChineseChem.Eng.,46,156(1995)［9］Tian,Y.,Wang,G.,Wu,Z.,J.ChineseChem.Eng.,47,75(1996)［10］Lycka,A.,DyesandPigment,32,11(1996)［11］Griffith,J.,ColourandConstitutionofOrganicMolecules,AcademicPress,London,191(1976)
简介：Dibromobiphenylreactedwithcynomethylanioninammoniaunderirradiationtoformnucleophilicbis-substitutedproductinhighyieldwithoutsubstantialmonosubstitutedproduct.Quantumyieldsfortheformationsofbis-andmonosubstitutedproductswerefoundtobe85.6and2.3×10-6respectively,whilethecorrespondingpseudo-first-orderrateswere6.9×10-3and5.2×10-10mol.L-1.S-1.Blockupthepossibleelectrontransferof4-brome-4’-cyanomethylbiphenylylradicalanionto4-cyanometbyl-biphenylylradicalandbromineion.
简介：Weexperimentallydemonstratea4×4nonblockingsiliconthermo-optic(TO)switchfabricconsistingofthreestagesoftunablegeneralizedMach–Zehnderinterferometers.All24routingstatesfornonblockingswitchingarecharacterized.Thedevice’sfootprintis4.6mm×1.0mm.Measurementsshowthattheworstcrosstalkofallswitchingstatesis-7.2dB.Theon-chipinsertionlossisintherangeof3.7–13.1dB.TheaverageTOswitchingpowerconsumptionis104.8mW.
简介：Thesynthesisofopen-fiameworkmetalphosphateshasbeenasubjectofintenseresearchowingtotheirinterestingstructuralchemistryandpotentialapplicationsasionexchangers,catalystsandadsorbents.Alargenumberofthesematerialsaresynthesizedinthepresenceoforganicaminesasstructure-directingagents.Recently,manyresearchactivitieshavefocusedonthesynthesisofinorganic-organichybridframeworks.Ascomparedwithinorganicligands,theadvantageofusingorganicmultidentateligandsistheefficacyofrationaldesignofcrystallinesolidsthroughtheircoordinatingpropensitiesandgeometries.
简介：Thesynthesisandphasebehaviorofaseriesof4’-alkyloxy-4-hydroxybiphenylswerediscribed.Theeffectsofreactionconditionsontheyieldsofproductswereinvestigated.Thecharacterizationsofthermotropicliquidcrystallineproductsforthetypeandthermalpropertiesarediscussedthroughtheuseofdifferentialscanningcalorimetry,polarizingmicroscopy.
简介：Reactionsofthe6-hydroxy-thiopyrano[3,4-c]pyridine-5-carbonitrilederivative1withα-halo-carbonylcompoundsgavetheortho-substitutedintermediates2a-cwhichwereconvertedintofuro[2,3-b]thiopyrano[4,3-d]pyridines3a-cbyfusionofafuranmoietyunderbasicconditions.Furthercyclizationof3a-cledtoafusionofapyrimidinering,yieldingthetetracyclicproducts6,7and8.Inaddition,condensationof6withvariousaromaticaldehydesaffordedthecorrespondingimines9a,b.Mannichreactionof7gaveproducts10a,b.
简介：Thestructureofpolyimidefrom1,4-bis(3’,4’-dicarboxyphenoxy)benzeneand4,4’-oxydianilinefilmspecimensbeforeandafterhotstretchinghasbeeninvestigatedbyWAXD,DSCandFTIR.AsevidencedbyboththeWAXDandDSCresults,itcouldbebelievedthatstraininducedcrystallizationdidtakeplaceafterhotstretching.Meanwhile,shiftingpositionandsplittingofsomebandpeaksexistedontheFTIRspectrogramswereexplainedintermsoftheclosepackingofchainsandthechangesofinter-molecularcharge-transferinteractionbetweenimidegroupsandaromaticgroupsuponcrystallization.
简介：Ｏｎ △Ｉ＝４ Ｂｉｆｕｒｃａｔｉｏｎ ＰｈｅｎｏｍｅｎａＯｎ△Ｉ＝４ＢｉｆｕｒｃａｔｉｏｎＰｈｅｎｏｍｅｎａ￥ＺｈａｎｇＪｉｎｇｙｅ；ＹａｎｇＳｕｎａｎｄＭｉｋｅＧｕｉｄｒｙＴｈｅｅｘｐｅｒｉｍｅｎｔｓ－ｂｙｔｈｅｎｅｗ７－－ｒａｙｄｅｔｅｃｔｏｒ...
简介：Emissionquenchingof[Ru(bpy)2(4,4’-dcbpy)](PF6)2(1)bybenzenamine,4-[2-[5-[4-[4-dimethylamino]phenyl]-4,5-di-hydro-1-phenyl-1H-pyrazol-3-yl]-ethenyl]-N,N-dimetyl(2)or1,5-diphenyl-3-(2-phenothiazine)-2-pyrazoline(3)wasobserved.Measurementsoftheemissiondecayof1beforeandafteradditionof2or3bysinglephotoncountingtechniquecon-finnedtheobservations.Theemissionquenchingof1by2or3wassubmittedtoStern-Volmerequation.Itwascalculatedthatthequenchingrateconstants(kq)are5.5×109(mol/L)-1s-1for2and4.0×109(mol/L)-1s-1for3,respectively.Theseresultsindicatedacharacterofdynamicquenchingprocess.Thesinglet-stateof2or3wasalsoquenchedby1.ThequenchingbehaviorsdidnotconformtotheStern-Volmerequationandinvolvedbothstaticanddynamicquenchingprocesses.Theapparentquenchingrateconstant(kapp)wascalculatedtobe3×109(mol/L)-1fortheinteractionofexcited2with1,and1.2×109(mol/L)-1forthatofexcited3wit
简介：Therearemoreandmorecountriestoakeanefforttothestudiesofvanadiumalloyforfusionapplication.NIFSinJapanhasrecentlydevelopedan80kgheatV4Cr4Tialloy(NIFS-heat2)aftertheproductionofa500kgscaleV4Cr4TiinU.S.severalyearsago.PropertyevaluationofthealloyhasbeenputintoaninternationalcollaborationprogramunderthecoordinationofIEA(InternationalEnergyAgency).SWIPhasjoinedthecollabrationonthehydrogenembrittlementresistanceevaluationofthealloyt.
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4-alkoxy-2,3,5,6-tetrafluorophenyl)ethynyl]benzoates" title="The synthesis and phase transition of 4’-methylphenyl 4"-[(4-alkoxy-2,3,5,6-tetrafluorophenyl)ethynyl]benzoates">
![Synthesis and Properties of Functionalized Schiff Bases of 5α,10α-Di（<b style='color:red'>4</b>-hydroxylphenyl）calix[<b style='color:red'>4</b>]pyrrole and 5α,15β-Di（<b style='color:red'>4</b>-hydroxylphenyl）calix｜<b style='color:red'>4</b>] pyrrole](/image/thesis7 "Synthesis and Properties of Functionalized Schiff Bases of 5α,10α-Di（<b style='color:red'>4</b>-hydroxylphenyl）calix[<b style='color:red'>4</b>]pyrrole and 5α,15β-Di（<b style='color:red'>4</b>-hydroxylphenyl）calix｜<b style='color:red'>4</b>] pyrrole")
![Synthesis of thiopyrano[<b style='color:red'>4</b>',3':<b style='color:red'>4</b>',5']pyrido[3',2':<b style='color:red'>4</b>, 5]furo[3,2-d]pyrimidines](/image/thesis11 "Synthesis of thiopyrano[<b style='color:red'>4</b>',3':<b style='color:red'>4</b>',5']pyrido[3',2':<b style='color:red'>4</b>, 5]furo[3,2-d]pyrimidines")
![Efficient Synthesis of 3,5,6,8-Tetrahydro-<b style='color:red'>4</b>H-thiopyrano[<b style='color:red'>4</b>＇,3＇：<b style='color:red'>4</b>,5]. thieno｜2,3-d]pyrimidin-<b style='color:red'>4</b>-ones via an Iminophosphorane](/image/thesis13 "Efficient Synthesis of 3,5,6,8-Tetrahydro-<b style='color:red'>4</b>H-thiopyrano[<b style='color:red'>4</b>＇,3＇：<b style='color:red'>4</b>,5]. thieno｜2,3-d]pyrimidin-<b style='color:red'>4</b>-ones via an Iminophosphorane")
![Photoinduced electron transfer of [ Ru （bpy）2 （<b style='color:red'>4</b>, <b style='color:red'>4</b>’-dcbpy）]2+ with electron donors](/image/thesis17 "Photoinduced electron transfer of [ Ru （bpy）2 （<b style='color:red'>4</b>, <b style='color:red'>4</b>’-dcbpy）]2+ with electron donors")
