左联合谱的一个刻划及其应用

In this paper we characterize the left joint spectrum of an n-tuple T =(T1,... ,Tn) of dominant bounded linear operators on a complex Hilbert space H and the unital C^*-algebra C^*(T) generated by T1,… , Tn and I; moreover, we give an application of this characterization.     

Interferometric monitoring of single-mode operation of a tunable injection laser

We propose a technique for rapid monitoring of single-mode operation of a tunable injection laser, based on analysis of the fine structure of the power-current characteristic obtained with self-heterodyning, using a Michelson interferometer. The technique makes it possible to determine the range for single-mode lasing and mode tuning as well as the presence of spurious optical feedback, and to estimate the coherence length. __________ Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 73, No. 1, pp. 119–123, January–February, 2006.     

原子间的偶极相互作用对其在腔场中辐射谱的影响

研究了两个通过偶极-偶极力关联的两能级原子在单模腔场中的辐射谱,发现原子间偶极-偶极力的贡献;使辐射谱偏离关于中心频率的对称性.对真空场和强场情况作了细致的讨论.     

完全找到整系数不可约多项式的一种新方法

本利用一种独特的映射方法将整系数多项式映射为正有理数，运用谊映射方法和数论理论，可以找到任意多个整系数不可约多项式，因此，为扩频通信与信道密码利用不可约多项式提供了一种可行且实用的技术。     

Typical Changes in Spectral Properties under Perturbations by a Rank-One Operator

We show that under perturbations by a rank-one typical operator, a fixed eigenvalue loses one Jordan block of maximal order, while the orders of the other Jordan blocks remain unchanged. We construct the first-order perturbation theory for the new eigenvalues and the zero-order approximations to the corresponding eigenvectors.     

Raman spectroscopy studies of structural changes in hydrated titanium and tin dioxide gels under drying

Raman spectroscopy is used in this work to reveal an increase in the size of anatase crystallites in the process of drying of hydrated titanium dioxide gel and ordering of the structure of primary particles of hydrated tin dioxide gel under drying. Raman spectra are interpreted with account of dimensional effects. It is found that mechanical stresses that arise in the materials under drying have a great effect on the structural changes found there. TERMOXIDE Research and Production Company, 624051 Zarechnyi, Sverdlovsk Region, P/O Box 94, Russia. Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 64, No. 2, pp. 266–268, March–April, 1997.     

煤气管道沉积物的分析

以苯－乙醇为溶剂，在对煤气管道沉积物提取，分离后，采用２５ｍ＊０．２４ｍｍＩ．Ｄ．的石英毛细管ＯＶ－１０１柱进行了ＧＣ，ＧＣ－ＭＳ分析，鉴定出１９种有机成分，并用归一法作了定量分析，并用采用ＩＲ、点滴试验等方法对其无机物作了定性鉴定。     

膨胀石墨的Raman光谱研究

以波长为514.5nm的激光对550-920℃制备的膨胀石墨进行了Raman光谱研究,结果表明:膨胀石墨的Raman光谱与高取向热解石墨基本相同,分别在~1350、~1580、~2445、~2725、~3248和~4300cm-1处出现了相应的Raman位移;其中位于~1350、~2445和~4300cm-1的Raman峰位随着制备温度的不同会发生较大的移动,而不同温度制备的膨胀石墨位于~1580、~2725、~3248cm-1处的三个Ra-man峰位基本接近;~2725 cm-1处的二阶模包含两个分别位于2707和2730cm-1处的Raman峰。膨胀石墨的D模与G模强度比ID/IG随着温度升高下降,而D线的二阶模D*峰强ID*与IG的比值ID*/IG的大体变化趋势是随着温度升高而增大。     

Nanosecond-time-resolved infrared spectroscopic study of fast relaxation kinetics of protein folding by means of laser-induced temperature-jump

Elucidating the initial kinetics of folding pathways is critical to the understanding of the protein folding mechanism. Transient infrared spectroscopy has proved a powerful tool to probe the folding kinetics. Herein we report the construction of a nanosecond laser-induced temperature-jump （T-jump） technique coupled to a nanosecond timeresolved transient mid-infrared （mid-IR） spectrometer system capable of investigating the protein folding kinetics with a temporal resolution of 50 ns after deconvolution of the instrumental response function. The mid-IR source is a liquid N2 cooled CO laser covering a spectral range of 5.0μm （2000 cm^-1）-6.5μm （1540 cm^-1）. The heating pulse was generated by a high pressure H2 Raman shifter at wavelength of 1.9μm. The maximum temperature-jump could reach as high as 26±1℃. The fast folding/unfolding dynamics of cytochrome C was investigated by the constructed system, providing an example.     

Almost periodic Schrödinger operators along interval exchange transformations

It is shown that Schrödinger operators, with potentials along the shift embedding of irreducible interval exchange transformations in a dense set, have pure singular continuous spectrum for Lebesgue almost all points of the interval. Such potentials are natural generalizations of the Sturmian case.