某些钕和铒的甲苯酸类配合物的超灵敏跃迁吸收光谱研究

研究了Ｎｄ＾３＋和Ｅｒ＾３＋与苯甲酸、水杨酸、对羟基苯甲酸、邻氨基苯甲酸、对氯苯甲酸和邻菲罗啉配体所组成的配合物在９５％乙醇中的ｆ－ｆ超灵敏跃迁吸收光谱。计算了超灵敏跃迁峰的振子强度Ｐ、电子云伸展比β、共价参数δ、共价参数δ和键合参数ｂ＾１／２。探讨了配合物的共价性。     

钕或铒的氨基酸-邻菲罗啉体系中超灵敏吸收光谱研究

本文研究了Ｎｄ＾３＋、Ｅｒ＾３＋与某些α－氨基酸及ｐｈｅｎ的二元和三元配合物在９５％乙醇体系中ｆ－ｆ超灵敏跃迁吸收光谱,计算了超灵敏跃迁峰的振子强度及β、δ、ｂ＾１／２参数。     

某些钕和铒的苯甲酸类配合物的超灵敏跃迁吸收光谱研究

研究了Ｎｄ~（３＋）和Ｅｒ~（３＋）与苯甲酸、水杨酸、对羟基苯甲酸、邻氨基苯甲酸、对氯苯甲酸和邻菲罗啉配体所组成的配合物在９５％乙醇中的ｆ－ｆ超灵敏跃迁吸收光谱。计算了超灵敏跃迁峰的振子强度Ｐ、电子云伸展比β、共价参数δ和键合多数ｂ~（１／２）。探讨了配合物的共价性。     

三价铕离子配合物的激光光谱研究

利用高灵敏度的时间辨激光光谱技术研究了在配位场作用下Ｅｕ＾３＾＋的直接激发与发特性。Ｅｕ＾３＾＋的直接激发光谱（特别是７Ｆ０－５Ｄ０的超灵敏跃迁）及其发射光谱随不同的配合物的变化，同时观测到与配位对称性及配位强度有联系的７Ｆ１－５Ｄ０磁偶极跃 迁的分裂。在对７Ｆ０－５Ｄ０跃迁共振与非共振的１０ｐｓ激光脉冲的激励下，都可以立即观察到５Ｄ０－７ＦＪ（Ｊ＝２，３，４）的发射，说明Ｅｕ＾３＾＋的５Ｄ０能态     

钐（Ⅲ）,铽（Ⅲ）与色氨酸和苯丙氨酸配合物的光声光谱研究

合成了Ｌｎ（Ｔｒｐ（３Ｃｌ３．Ｈ２Ｏ和Ｌｎ（Ｐｈｅ）Ｃｌ３．５Ｈ２Ｏ（Ｌｎ＾３＋为Ｓｍ＾３＋，Ｔｂ＾３＋）固体配合物微晶，在３００－７００ｎｍ测定并解释了配合物的光声光谱。从无辐射跃迁角度研究芳香氨基酸固体配合物的能级状况和分子内能量传递过程。结合荧光光谱研究了芳香氨基酸固体配合物的发光特性，并建立了激发驰豫模型。     

均苯四甲酸-三苯基氧化膦-铽-钇配合物的高效发光

合成了ＰＭＡ－Ｔｂ＾３＋,ＰＭ－ＡＴＰＰＯ（Ｐｈｅｎ）－Ｔｂ＾３＋及其掺杂Ｙ＾３＋,Ｇｄ６３＋的系列配合物,常温下研究了它们的固体粉末荧光光谱,发现在二元配合物中掺杂Ｙ＾３＋比掺杂Ｇｄ＾３＋发光强,在三元配合物中以三苯基氧化膦作第二配体比以邻菲罗林作第二配体的配合物发光强,得到了鲜艳绿色的高效荧光材料ＰＭＡ－ＴＰＰＯ－Ｔｂ＾３＋,Ｙ＾３＋。     

Ba1—x—yEuxGdyMgF4＋y复合氟化物中Eu^2＋离子的f—f跃迁线谱发射

报道了Ｇｄ＾３＋与Ｅｕ＾２＋共掺杂的钡镁复合氟化物在室温下的发射光谱中，不仅存在Ｅｕ＾２＋的带状发射，而且还出现了Ｅｕ＾２＋的４ｆ（＾６Ｐ７／２）－４ｆ（＾８Ｓ７／２）线谱发射，在该体系中，由于Ｇｄ＾３＋掺入后，诱导出一另一种Ｅｕ＾２＋的线谱发射中心，两种Ｅｕ＾２＋发射中心的激发光谱明显不同，ｆ－ｆ跃迁线谱发射的强度与Ｇｄ＾３＋及Ｅｕ＾２＋的浓度密切相关。     

腩（Ⅲ）多核配合物的形成及其荧光增强效应

利用荧光增强盗中成了铕（Ⅲ）异多核固体物，通过元素分析等离子体发射光谱、红外光谱、荧光光谱等测试手段研究事物的组成、结构和发光性质。结果表明增强离子Ｇｄ＾３＋、Ｌａ＾３＋和Ｙ＾３＋离子的加入能显著的提高配合物中ＥＵ＾３＋中心的发光强 种荧光效应能减少较为贵的铕在配合物中的用量，从而降侈产品的成本。     

二元羧酸-联吡啶稀土双核配合物中镧、铽对铕发光的增强作用

合成了以邻苯二甲酸、２,２’－联吡啶为配体,分别以Ｅｕ＾３＋－Ｔｂ＾３＋ｙ离子和Ｅｕ＾３＋－Ｌａ＾３＋离子为中心体的双核稀土配合物;在３２３ｎｍ紫外光激发与的的荧光光谱。结果表明,在该两系列双核稀土配合物中,无 发光的Ｔｂ＾３＋离子还是不发光的Ｌａ＾３＋离子,都对Ｅｕ＾３＋离子的发光有增强作用。     

CexY3—xAl5O12中Ce^3＋的4f多重态耦合对其磁矩和磁光性能的影响

计算了ＣｅｘＹ３－ｘＡｌ５Ｏ２晶体中Ｃｅ＾３＋由晶场导致的４ｆ欧重态之间的耦合对Ｃｅ＾３＋离子基态磁矩和磁光Ｆａｒａｄａｙ旋转的影响及其温度特性。结果表明，Ｃｅ＾３＋４ｆ＾２Ｆ７／２和＾２Ｆ５／２多重态的耦合，使Ｃｅ＾３＋的基态磁和左在温度３００Ｋ和２０Ｋ时分别     

白光和红绿蓝光LED可调光源研制

为了提高LED光源色温和亮度的调节精度和准确度,结合色温由低向高变化时光色所呈现的渐变特点,提出了一种低色温白光LED灯珠、高色温白光LED灯珠加红绿蓝光LED灯珠补偿式调光的方法.将色温分成三个部分进行调节,每个部分选用不同的LED灯珠组合来进行调光.实验结果表明:不同组合情况下的LED光源的初始输出色温相对于目标值的偏差范围在1％以内;亮度可以在保证色温不变的情况下独立进行调节,初始输出值与目标值的偏差范围在1％以内;经过微调之后可以达到目标值;达到了色温和亮度独立调节的要求;光源发光稳定,不会因为长时间工作而影响调节精度.     

Visualization and interferometry for cylindrical and spherical sample tomography and profilometry

A technique combining image processing and laser interferometry for visualizing and detecting the deformation of transparent cylindrical and spherical sample is proposed. This deformation includes geometric deformation such as volume transition in profilometry and physical deformation such as refractive index change in tomography. Phase contour lines are used for quantitative analysis and graphical representation of the deformation. This method allows us to visually detect the spatial variation of the deformation field and to evaluate the test quality such as misalignment of optical system. A theoretical analysis using phase contour map to characterize the deformation field is described in detail. A method using phase contour map to qualify the interferometric test is proposed. Analysis of test examples is carried out. Suggestions on using phase contour line method to ameliorate test system design are finally discussed.     

Quantum and Classical Disparity and Accord

Discrepancies and accords between quantum (QM) and classical mechanics (CM) related to expectation values and periods are generally found for both the harmonic oscillator (SHO) and a free particle in a box (FPB), which may apply generally. These indicate non-locality is expected throughout QM. The FPB energy states violate the Correspondence Principle. Previously unexpected accords are found and proven that 〈x ²〉 _CM =〈x ²〉 _QM and τ _CM =τ _QMb (beat period i.e. beats between the phases for adjoining energy states) for the SHO for all quantum numbers, n. However, for the FPB the beat periods differ at small n. It is shown that a particle’s velocity in an infinite square well varies, no matter how wide the box, nor how far the particle is from the walls. The quantum free particle variances share an indirect commonality with the Aharonov-Bohm and Aharonov-Casher effects in that there is a quantum action in the absence of a force. The concept of an “Expectation Value over a Partial Well Width” is introduced. This paper raises the question as to whether these inconsistencies are undetectable, or can be empirically ascertained. These inherent variances may need to be fixed, or nature is manifestly more non-classical than expected.     

国外超导材料技术研究政策和方向

超导材料技术是21世纪具有战略意义的高新技术,极具发展潜力和市场前景。世界各发达国家纷纷制定研发计划,给予高度重视和大力支持,加快超导材料技术的基础研究和产业化发展。主要从美国、日本、欧洲国家、韩国等国家的相关研发计划、政策以及主要科研机构的研发概况出发,阐明目前国外超导材料技术的研究政策和方向。     

黑克、布劳、及伯曼-温采尔代数的诱导及分导系数和量子经典李代数的耦合与重新耦合系数

本文总结了计算黑克、布劳、及伯曼 温采尔代数在各种工数链下诱导及分导系数的线性方程方法(LEM)。特别强调了关于A,B,C,D型李代数及其量子情形与其中心代数之间的舒尔 魏尔 布劳双关性关系。这一关系使我们能够利用相应中心代数的诱导及分导系数计算出经典李代数及其量子情形的耦合与重新耦合系数。讨论了从该方法得到B,C,D型李代数不可约表示克罗内克积分解的应用。基于LEM还得到了处理对应于置换群CG系列问题的黑克代数张量积的方法。     

Divergence- and Curl-Preserving Prolongation and Restriction Formulas

We present new second-order prolongation and restriction formulas which preserve the divergence and, in some cases, the curl of a discretized vector field. The formulas are suitable for adaptive and hierarchical mesh algorithms with a factor-of-2 linear resolution change. We examine both staggered and collocated discretizations for the vector field on two- and three-dimensional Cartesian grids. The new formulas can be used in combination with numerical schemes that require a divergence-free solution in some discrete sense, such as the constrained transport schemes of computational magnetohydrodynamics. We also obtain divergence-preserving interpolation functions which may be used for streamline or field line tracing.     

Nano and micro-scale fluid and plasma dynamics: present and future applications

In this letter, we illustrate the importance of fluid dynamics research by considering two particular areas of study: nano- and micro-scale fluid and plasma dynamics. We show how improved scientific knowledge of nano- and micro-fluid dynamics can significantly enhance our future. Application is also discussed regarding environmental aspects.     

Maximum-Entropy and Stability in Statistics and Thermodynamics

The object of the present paper is first to study the role of maximum-entropy principle based on Shannon's entropy in generating stable distribution in statistics and characterizing stable thermal equilibrium state in thermodynamics. The second is to show the nonuniqueness of Shannon's entropy in the study of the stable distribution in statistics and stable equilibrium state in thermodynamics.     

Non-stoichiometric oxide and metal interfaces and reactions

We have employed a combination of experimental surface science techniques and density functional calculations to study the reduction of TiO₂(110) surfaces through the doping with submonolayer transition metals. We concentrate on the role of Ti adatoms in self doping of rutile and contrast the behaviour to that of Cr. DFT+U calculations enable identification of probable adsorption structures and their spectroscopic characteristics. Adsorption of both metals leads to a broken symmetry and an asymmetric charge transfer localised around the defect site of a mixed localised/delocalised character. Charge transfer creates defect states with Ti 3d character in the band gap at ∼1-eV binding energy. Cr adsorption, however, leads to a very large shift in the valence-band edge to higher binding energy and the creation of Cr 3d states at 2.8-eV binding energy. Low-temperature oxidation lifts the Ti-derived band-gap states and modifies the intensity of the Cr features, indicative of a change of oxidation state from Cr³⁺ to Cr⁴⁺. Higher temperature processing leads to a loss of Cr from the surface region, indicative of its substitution into the bulk.