简介:Breakthroughsinnuclearnon-proliferation.Afterhardbargaininglastingovertwoandahalfyears,thelong-awaitedComprehensiveTestBanTreaty(CTBT)waseventuallyadoptedbyanover-whelmingmajorityatthe50thUNAssemblyinearlySeptember1996withthusfar130signatorynationstoit.Inspiteofsomeimperfections,theTreatyrepre-
简介:RemarkableAchievementsinPovertyAlleviationinNorthwestChina¥//Theextentofpovertyinthe"SanXiAreas"hasbeengreatlyalleviatedinthe...
简介:现在的纸处理包括的球状地对称的变丑--矩阵问题,它由一个无限的各向同性的矩阵和球状地一致的各向异性的压电的包括组成。在二个阶段之间的接口应当是完美的,系统在无穷受到一致装载。准确答案为稳固的球形的压电的包括和各向同性的矩阵被获得。当系统受到遥远的拖拉时,分析结果证明显著自然在球形的包括存在。一个无限的压力出现在包括的中心,这被表明。而且,当系统受到一致紧张时,成穴可以发生在包括的中心,当当应用拖拉是一致压力时,一个黑洞可以在包括的中心被形成时。不同显著自然的外观仅仅取决于一个非维的材料参数和遥远的拖拉的类型,当时独立于拖拉的大小。
简介:Seventyyearsago,ChinaandtheworldAnti-FascistAllieswonthegreatvictoryoftheAnti-FascistWar.Asthemainbattlefieldontheeasternfront,theChinesePeople’sWarofResistanceagainstJapaneseAggressionmadeindeliblecontributionstothefinalvictoryoftheWorldAnti-FascistWar.TheChinesepeoplethrewthemselvesintheWarofResistanceforfourteenyears.Chinasufferedover35millioncasualties,butitspeoplemadegreatcontributions.Inthepost-warera,astheworld’smostpopulousdevelopingcountry,Chinaattachesgreatimportancetotheprotectionofhumanrightsbyruleoflaw,followsthepathofpeacefuldevelopment,remainsastaunchforceinmaintainingworldpeace,andmakesoutstandingcontributionsinachievingworldpeaceandhumanrightsprotection.
简介:Apolymer(poly(9,10-anthracenevinylene-alt-4,4’-(9,9-bis(4-(4’-(1,2,2’-triphenylvinyl)phenoxy)butyl)-9Hfluorene-2,7-diyl)dibenzaldehyde),P1)wassuccessfullysynthesizedthroughtheWittig-Hornerreactionbyemployingfluoreneand9,10-distyrylanthracenemoietiesasbuildingblocksforbackboneandtetraphenylethenesaspendantgroups.Photophysicalandthermalpropertiesoftheresultingpolymericemitterwerefullycharacterizedbyultraviolet-visible(UVVis)absorptionandphotoluminescence(PL)spectra,thermogravimetricanalysis(TGA)anddifferentialscanningcalorimetry(DSC).WhileP1emitsanorange-lightcenteredat567nmindilutetetrahydrofuran(THF)solution,thesolidpowderofthepolymerexhibitsstrongyellowemissionpeakedat541nm.Itisalsofoundthattheas-synthesizedpolymershowsuniquepropertyofaggregation-enhancedemission(AEE).Inaddition,P1possesseshighthermalstabilitywithadecompositiontemperature(Td,5%)of430°Candhighmorphologicalstabilitywithaglasstransitiontemperature(Tg)of171°C.Underthestimulusofmechanicalforce,theemissionofP1canbechangedfromyellowtored(Δλmax=61nm),showingaremarkablemechanochromism.TheresultsfromXRDanalysissuggestthatsuchmechanochromicphenomenonofP1isprobablycausedbythedestructionofcrystallinestructure,whichleadstotheconformationalplanarizationofthedistyrylanthracenemoietiesformingbythepolymerizationandtheincreaseofmolecularconjugationofthebackbone.
简介:Weidentifythattheprojecteduncertaintyofthepan-Arcticsea-iceconcentration(SIC)isstronglycoupledwiththeEurasiancirculationintheborealwinter(December-March;DJFM),basedonasingularvaluedecomposition(SVD)analysisoftheforcedresponseof11CMIP5models.Inthemodelsshowingastrongersea-icedecline,thePolarcellbecomesweakerandthereisananomalousincreaseinthesealevelpressure(SLP)along60°N,includingtheUrals-SiberiaregionandtheIcelandlowregion.ThereisanaccompanyingweakeningofboththemidlatitudewesterlywindsandtheFerrellcell,wheretheSVDsignalsarealsorelatedtoanomalousseasurfacetemperaturewarminginthemidlatitudeNorthAtlantic.IntheMediterraneanregion,theanomalouscirculationresponseshowsadecreasingSLPandincreasingprecipitation.TheanomalousSLPresponsesovertheEuro-AtlanticregionprojectontothenegativeNorthAtlanticOscillation-likepattern.Altogether,pan-ArcticSICdeclinecouldstronglyimpactthewinterEurasianclimate,butweshouldbecautiousaboutthecausalityoftheirlinkage.
简介:Throughournewly-developed'chemicalvapordepositionintegratedprocess(CVD-IP)'usingcarbondioxide(CO2)astherawmaterialandonlycarbonsourceintroduced,CO2couldbecatalyticallyactivatedandconvertedtoanewsolid-formproduct,i.e.,carbonnanotubes(CO2-derived)ataquitehighyield(thesingle-passcarbonyieldinthesolid-formcarbon-productproducedfromCO2catalyticcaptureandconversionwasmorethan30%atasingle-passcarbon-base).Forcomparison,whenonlypurecarbondioxidewasintroducedusingtheconventionalCVDmethodwithoutintegratedprocess,nosolid-formcarbon-materialproductcouldbeformed.IntheadditionofsaturatedsteamatroomtemperatureinthefeedforCVD,thereweremuchmoreend-openingcarbonnano-tubesproduced,ataslightlyhighercarbonyield.Theseinspiringworksopenedaremarkableandalternativenewapproachforcarbondioxidecatalyticcapturetosolid-formproduct,comparingwiththatofCO2sequestration(CCS)orCO2mineralization(solidification),etc.Asaresult,therewasmuchlessbodyvolumeandalmostnogreenhouseeffectforthissolid-formcarbon-materialthanthoseofprimitivecarbondioxide.