排序方式: 共有17条查询结果,搜索用时 15 毫秒
1.
用超高真空程序升温反应谱和瞬时应答方法研究了乙二醇在电解银表面的氧化,实验表明,室温下乙二醇吸附在电解银表面,并在343K分解给出一组产物群,预吸附氧与乙二醇反应时,在343K,433K和612K处给出三组产物群,它们分别对应于不同的表面反应,并给出了电解银催化乙二醇制乙二醛的活性结果。 相似文献
2.
The Riccati type equation, the Biicklund transformation and the Lax pair of the Liouville equation are obtained by using the prolongation theory. It is shown that the prolongation structures generate the SL(2,R) Lie algebra. 相似文献
3.
The GUT scale is determed in supersymmetric grand unified models.It is obtained naturally that there is only one heavy scale.So we can construct a class of no scale SUSY GUTS in which the gravitino mass,m3/2=O(mw) and mw is determined by radiative corrections. 相似文献
4.
5.
图G(V,E)的一个正常k-全染色σ称为G(V,E)的一个k-点强全染色,当且仅当v∈V(G),N[v]中的元素着不同颜色,其中N[v]={u vu∈V(G)}∪{v};并且χvTs(G)=m in{k存在G的一个k-点强全染色}称为G的点强全色数.本文确定了完全图Kn的广义图K(n,m)和乘积图Lm×Kn的点强全色数. 相似文献
6.
Using the three-chain diagram based on the dual partonic scheme, combining with the FF quark fragmentation mechanism, the charged particle multiplicity, the productions of Л and K mesons, the single-particle inclusive distribution and the central plateau particle density of soft high energy pp annihilation are calculated and compared with pp experiments on CERN SPS. 相似文献
7.
8.
Polymer chain ends play an important role in the glassy dynamics of polymeric materials.In this study,a combination of single molecule defocus fluorescence microscopy and well-controlled atom transfer radical polymerization was used to investigate site-dependent segmental mobility of poly(n-butyl methacrylate).As the temperature increased,the rotation of fluorophores,which were selectively labelled in chain end and chain middle,was gradually activated.The power spectra of rotation trajectories,the distribution of angular displacement as well as the population of rotating fluorophores demonstrated that the local dynamics was more activated at the chain ends than the middles,showing the unique contribution of the chain end to the dynamics of the system. 相似文献
9.
10.
荧光关联光谱(fluorescence correlation spectroscopy,FCS)是一项用于研究体系动力学性质的统计光谱技术,随着它被引入材料与化学研究领域,近年来取得了大量全新的研究成果.该技术在高分子科学研究中也逐渐发挥出越来越大的作用,特别是在聚合物结构和动力学方面,这表明它在高分子领域的巨大潜力.本文将从FCS的基本原理、实验技巧以及在一些具有挑战性体系中的应用等方面展开,着重介绍它在高分子溶液,如聚电解质溶液、高分子混致不溶现象,以及不同的表界面体系中取得的新成果,展示FCS区别于其他传统技术的特点和优势. 相似文献