Integral representation of continuous comonotonically additive functionals

In this paper, I first prove an integral representation theorem: Every quasi-integral on a Stone lattice can be represented by a unique upper-continuous capacity. I then apply this representation theorem to study the topological structure of the space of all upper-continuous capacities on a compact space, and to prove the existence of an upper-continuous capacity on the product space of infinitely many compact Hausdorff spaces with a collection of consistent finite marginals.

     

改进的 K/S 算法对近红外光谱模型传递影响的研究

在近红外光谱分析模型传递中,常用Kennard/Stone算法(K/S算法)来选择转换集样品。K/S算法是根据样品间光谱的欧氏距离来计算样品间差异的。为了寻求样品间差异的最佳表达方式,用K/S算法选出更有代表性的样品。文章分别用欧氏距离和马氏距离计算混胺样品的光谱差异,用PDS算法传递混胺中二甲苯胺近红外光谱分析模型,通过传递后的预测标准偏差(SEP)评价两种距离的优劣。用性质差异和光谱差异结合的方式计算样品间的差异,并与单独用光谱差异和性质差异的方式进行比较。结果表明,在PDS算法中,马氏距离选出的样品更具有代表性,性质差异和光谱差异的结合更能代表样品间的差异。     

Microstructural and magnetic characterization of dusts from a stone crushing industry in Birbhum, India

Stone dust sample collected from a stone crushing industry situated at Muhammad Bazar in Birbhum, India, is studied for its physical characterization using various techniques. Morphology and compositional analysis of the stone dust by scanning electron microscopy (SEM) reveal that the dust is an agglomeration of many tiny particles (0.32-2.12 μm), mostly having sharp edges, as well show microstructure heterogeneity. Elements present in the sample are detected by energy dispersive X-ray spectrometry (EDX). The X-ray diffraction (XRD) pattern analysis shows that the sample mainly contains minerals like anorthite, augite, esseneite and albite. An overall antiferromagnetic interaction in this sample has been indicated by the nature of the thermal dependence of magnetization. The remnant magnetization study apparently indicates two magnetic transitions at low temperatures. ⁵⁷Fe Mössbauer spectroscopy has been employed to detect different possible iron sites as well as to estimate the respective site population. In general, Mössbauer spectroscopic results corroborate the observations made through XRD analysis in general.     

电感耦合等离子体原子发射光谱（ICP-AES）法测定石煤钒矿石中钒、铁、钛的含量

研究一种快速准确测定石煤钒矿石中钒、铁、钛含量的方法对石煤钒矿检测行业的发展和石煤钒矿资源的开发利用、综合评价具有重要的意义。本研究试样经过氧化钠在650℃完全熔融后保持1-3min,取出冷却,热水浸提,盐酸酸化,定容稀释,选择V 292.402nm 、Fe 259.940nm 、Ti 334.941nm为分析谱线,利用电感耦合等离子体原子发射光谱法（ ICP-AES ）,建立了石煤钒矿石中同时测定钒、铁、钛含量的方法。试验优化了钒、铁、钛元素的分析谱线和背景校正模式,采用全程序样品空白稀释配置的校准曲线消除盐度钠基影响;研究了坩埚、熔剂种类、直接碱熔与灼烧-碱熔前处理方式、酸度效应的影响。结果表明,方法检出限为0.009%～0.019%,定量限为0.027%～0.057%;铁、钛、钒3元素浓度在0.10～30.0μg/mL时,校准曲线线性回归方程的相关系数均大于0.9999;采用国家一级标准物质（GBW 07876、GBW 07877、GBW 07878）进行验证,相对标准偏差( RSD%,n =12) 为 0.49～0.87,且测定值与标准值吻合。该方法具有快速简便、精密度好、准确度高、同时测定钒、铁、钛等优点,满足石煤钒矿石化学分析检测需求,且可为石煤钒矿化学分析标准方法的建立提供技术支撑。