Rietveld全谱拟合表征掺杂ZnO陶瓷

通过Rietveld全谱拟合对掺杂多物相ZnO陶瓷的物相定量组成,所含尖晶石相的化学配比、晶粒大小和残余应力等结构参数同时进行了表征,既快又准。研究结果表明,掺杂ZnO陶瓷以保持原晶格常数和没有其它元素掺杂的较大颗粒的ZnO相为主体,高分散的Bi₂O₃相与尖晶石相晶粒分散于ZnO晶粒间。尖晶石相的元素组成随原料的掺杂组分配比不同而不同,利用全谱拟合精修确定了它们的元素组成。     

多相聚合物体系熔体动态过程中相形成与发展——PS/PcBR非相容体系的扫描电子显微镜图样分析

以连续共混过程间歇出料法研究了PS/PcBR非相容体系共混过程中的扫描电子显微镜图样演化过程 ,从平均粒径、特征长度Λ和平均特征长度Λm 多个方面讨论了非相容体系的共混过程 ,并以标度函数P(Λ/Λm)证明非相容体系共混过程在一定时间和空间范围内具有自相似性 ,且分形维数D可以作为一个参数描述熔体动态过程     

计算机模式识别法对关节变形强直性脊柱炎微量元素谱的研究

测定了关节变形强直性脊柱炎患者及健康人头发样本中的十五种微量元素含量,运用计算机模式识别技术研究两类样本的微量元素谱差异,选择Ca、Pb、Zn、Ti、Ni、Mg和Sr元素为特征参量,用马氏距离法对两类样本进行回判和预报,其准确率均高于92%,高维空间分类成功,表明两类人的微量元素谱确实存在明显差异。     

Phase States of Europium Selenites in Aqueous Medium and in Thermal Analysis

The solubility isotherm of the system Eu₂O₃-SeO₂-H₂O was studied at 100°C. Certain amounts of the obtained selenites (normal and acid) were subjected to thermal analysis. The intermediate phases were isolated and chemical and X-ray phase analysis was made. The scheme of thermal decomposition was determined. This revised version was published online in August 2006 with corrections to the Cover Date.     

Effect of magnetic field on melt flow and crystal growth of oxide crystals

The flow in an oxide melt such as LiNbO, and TiO₂ in a high magnetic field was observed by using magnetic-field-applied Czochralski equipment for oxide crystals. It was found that the flows in oxides melts were very much different from these in a semiconductor melt. The single crystals of TiO₂ were grown in a magnetic field by using this equipment.     

橡胶磨损花纹裂纹角的分形计算法

在考察橡胶磨损花纹裂纹角与橡胶磨损表面分形维数关系的基础上,提出了用分形计算橡胶磨粒磨损的磨损花纹裂纹角的新方法,发现丁苯橡胶和丁腈橡胶磨损花纹的裂纹角在不稳定磨损阶段基本保持不变,而在稳定磨损阶段则随法向载荷的增大而减小．     

Rotation invariant Target Detection Using a Hybrid Optical Circular Harmonic Joint Transform Correlator with DC Bias

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Interference Pattern in Resonance Fluorescence from Two Atom System

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Multitarget Detection Using a Hybrid Optical Joint Transform Correlator with Power Spectrum Subtraction

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化学计量学的基础算法与应用研究

本文综合讨论了化学计量学的一些基础问题,包括分析信息理论、实验设计与优化、采样理论、分析检测理论、校正理论、分析信号处理、化学模式识别和计算机数字模拟等,并介绍了作者实验室的部分近期工作。