丁基罗丹明B-AuI4-缔合纳米粒子体系的极谱猝灭效应研究

在0．1mol／LH2SO4介质中，丁基罗丹明B(RBB)在-0．59伏产生1个单扫描极谱峰。当有AuI^-4存在时，AuI^-4与RBB^ 主要通过静电引力形成疏水性的AuI4—2RBB缔合物分子。AuI4—2RBB存在较强的分子间作用力和疏水作用力而生成紫红色的(AuI4—RBB)n纳米微粒，在470nm处产生1个瑞利散射峰，在610nm处产生1个共振瑞利散射峰；而在-0．59伏处的极谱峰降低。这是由于该紫红色复合纳米微粒形成所致。当纳米微粒体系加入乙醇后，体系的瑞利散射峰和共振瑞利散射峰消失，极谱峰、同步荧光峰和颜色恢复，由于乙醇而致使紫红色的(AuI4-RBB)n纳米微粒分解为红色AuI4—RBB分子。研究结果表明，紫红色(AuI4-RBB)。纳米粒子的形成是其极谱猝灭和共振瑞利散射效应的根本原因。     

柴油机活塞环耐磨性探讨

通过分析活塞环的基体组织、径向弹力与气缸套的匹配以及对其施行表面处理，以提高活塞环的耐磨性。对活塞环进行调质或渗氮处理，可显著提高其使用寿命。     

现代化中厚板热处理机组及其使用效果

介绍了引进的辐射加热无氧化辊式热处理炉及连续辊式淬火机，有效地解决了钢板的表面质量问题，取得了满意的效果．     

2－芳基苯并噁唑的荧光猝灭和光诱导电子转移研究

本工作对两种不同的２－芳基苯并　唑化合物溶液荧光被四氯化碳所猝灭的机理进行了详细研究，通过多种途径研究表明该猝灭过程具有光诱导电子转移性质，工作还利用此电子转移所形成的活泼自由基来引发烯类单体的聚合，得到了有一定聚合度的聚甲基丙烯酸甲酯。     

Local orders,lattice distortions,and electronic structure dominated mechanical properties of (ZrHfTaM1M2)C (M = Nb,Ti, V)

High-entropy carbides (HECs) are regarded as potential candidate structural materials with attractive mechanical properties due to their ultra-high hardness. It is essential to reveal the atomic and electronic basis for strengthening mechanism in order to develop the advanced HECs. In the present work, C (M = Nb, Ti, V) are selected as case studies. The effects of transition metals (M) on the lattice parameters, bulk modulus, enthalpy of formation, electron work function (EWF), and bonding morphology/strength of HECs are comprehensively studied by first-principles calculations. It is found that the lattice parameters, equilibrium volumes, and bulk modulus of HECs are improved with the increase of M atomic volumes. The atomic-size differences among various groups of elements not only result in the lattice mismatch/distortion but also contribute to the formation of weak spots. In the view of bonding charge density, the electron redistributions caused by the coupling effect of the lattice distortion and valance electron differences can be revealed obviously, which identify the different bonding strength. Moreover, in terms of EWF, the proposed power-law-scaled hardness of HECs is validated and matches well with those reported theoretical and experimental results, providing a strategy to design advanced HECs with excellent mechanical properties.     

Synthesis and electrochemical characterization of a new Se-doped spinel material for lithium secondary batteries

A new Se-doped spinel material, LiAl_0.18Se_0.02Mn_1.8O₄ powder with a phase-pure polycrystalline was synthesized by a sol–gel method. The material in the 3 V region (2.4 3.5 V) and both the 3 and 4 V region (2.4 4.4 V) initially deliver a discharge capacity of 81 and 178 mA h g^–1 which increase with cycling to reach 110 and 204 after 50 cycles, respectively. The material shows excellent cycleability in the 4 V region (3.0 4.4 V) with almost no capacity loss. The structural integrity of the Se-doped spinel was characterized by charge–discharge cycling tests and X-;ray diffraction.     

固溶体补强增韧的机理

本文主要对无机非金属材料晶体因固溶外来离子而对晶体强度和韧性的贡献进行阐述。本文从固溶类型、点阵畸变、畸变应力着手进行讨论。     

气化炉锥底砖、激冷环与下降筒的损毁与解决对策

针对国产化大氮肥水煤浆气化炉中锥底砖、激冷环和下降筒使用过程中出现的问题,分析了损毁原因,分别从技术改进、工艺操作和设备管理等方面提出了相应的解决对策,可以不同程度地延长锥底砖、激冷环、下降筒的寿命。     

Anisotropy of X-ray structural parameters of the three phase model in cellulose I

Anisotropy of X-ray structural parameters of the three phase model proposed by Mitra and Mukherjee (ref.2), has been investigated in the case of cellulose fibres of ramie, hemp and jute. The structural parameters have been determined separately from each of the observable equatorial reflections. It has been found that the parameter degree of crystallinity as defined in the model is in fact anisotropic at least in the samples studied. The parameter degree of paracrystallinity introduced by Mitra and Mukherjee was also found to be anisotropic. Several important correlations between the structural parameters have been drawn. It has been observed, in agreement with the recent findings of Hosemann and Balta Calleja (ref.10) that the greater the paracrystalline distortion, the smaller the ‘paracrystallite size’.     

自动化翻拍图像空间失真复原研究

在自动化翻拍的图像采集过程中,图像中各像素间的空间相互关系会随着采集发生变化,通过对空间失真复原算法的深入研究,利用几何极坐标、中值滤波等方法,提出自动化翻拍图像复原算法。实验结果表明,使用该算法能够消除由图像采集引起的空间畸变失真,提高图像的可识别性,是一种有效的方法。