简介:摘要:机械结构类申请的改进点一般在常规的机械结构之间的配合,从技术手段的角度出发难以扩展关键词。本文根据实际检索经验,提出从技术效果的角度出发进行检索,并给出了effect字段在技术效果检索中的应用,实现机械结构类申请的快速检索。
简介:PbSnanoparticlesmodifiedbyapolymer(P-PbS)wasprepared,andthetransientnonlinearopticalpropertiesstudiedbyfemtosecondopticalKerreffect(OKE)spectroscopyforthefirsttime.Averylargenonlinearopticaleffect(X^(3)-5.6×10^-12esu)withresponsetimecomparabletothelaserpulse(-165fs)wasobserved.ComparingwithPbSnonoparticlesstabilizedwithPVAandcoatedwithsodiumdodecylebenzenesulphonate(DBS).theopticalnonlinearityofthePbSnanoparticlesmodifiedbythepolymerismuchlargerthanthoseofthem.Thereafter.thecorrespondingnonlinearitymechanismwasinterpreted.