ICP－AES中无机酸效应与OH带强度相关性研究

本文用干扰因子法对ＩＣＰ－ＡＥＳ中无机酸的非光谱干扰进行了讨论，特别是对元素干扰因子与ＯＨ带干扰因子之间的相关性作了较深入探讨。由此建立了元素干扰因子与ＯＨ带干扰因子之间的线性回归方程，并以ＯＨ带作为通用内参比线来校正无机酸效应引起的干扰。为了验证此种校正方法是否可行，我们对不同酸浓度的人工合成样品进行校正，校正后的回收率在８０％—１２０％之间，基本符合痕量分析要求，证明此种校正方法是可行的。     

Porous phytic acid-doped sodium alginate aerogels as the electrode material for the electrosorption of uranium from acidic solution

Journal of Radioanalytical and Nuclear Chemistry - A novel phytic acid-doped sodium alginate aerogel (Alg-PA) was prepared via a simple doping and freeze-drying method and was used as a...     

Preparation and characterization of Pd/PPy-SDS/foam-Ni and Pd/PPy-CTAB/foam-Ni electrodes with high electroactive surface area

Surfactant-doped electrodes, palladium/polymeric pyrrole-sodium dodecyl sulfate/foam-nickel (Pd/PPy-SDS/foam-Ni) electrode and palladium/polymeric pyrrole-cetyl trimethyl ammonium bromide/foam-nickel (Pd/PPy-CTAB/foam-Ni) electrode, were prepared by electrochemical deposition method. The characteristics of the prepared electrodes were investigated. Based on the results of scanning electron microscope, X-ray diffraction, inductively coupled plasma-atomic emission spectrometry, and cyclic voltammetry tests, both of the two surfactants could improve the electrodes' electrocatalytic activity. Results also indicate that Pd/PPy-SDS/foam-Ni electrode has higher catalytic potential capability than Pd/PPy-CTAB/foam-Ni electrode.     

豫西芦店滑动构造区瓦斯抽放技术研究

针对河南省"三软"煤屡岩性结构的特殊性以及翠见的顶板瓦斯突出现象,通过地质调查、室内岩样测试和现场压裂试验,系统地探讨了软岩顶板的变形特征、泥化性能、压裂性能以及瓦斯抽采技术.研究表明,在传统的注水压裂技术难以奏效的情况下,应根据项板不同的岩性结构而采用不同的瓦斯抽放方法,即单层坚硬顶板宜采用钻孔抽放法,而复杂破碎顶板宜采用巷遭抽放法.     

聚氯乙烯树脂层对球罐爆炸碎片连锁破坏概率的影响

依据塑性理论分析聚氯乙烯树脂保护层存在条件下的碎片抛射与破坏目标的过程,提出碎片穿透保护层的厚度与动能消耗的计算模型,并根据碎片抛射方程确定碎片碰撞及引发目标连锁破坏的概率。以球罐为例,应用Monte-Carlo法模拟了保护层对爆炸碎片连锁破坏效应的影响规律。结果表明:保护层可占有较大的破坏概率,显著减少目标破坏的可能性,目标连锁破坏概率由于目标穿透破坏概率的下降而平均降低了约4个数量级。偏差分析显示,保护层对连锁破坏概率的降低程度超过了99%。碎片连锁破坏概率随保护层厚度的变化呈现指数递减关系。研究结果可为球罐防护措施的合理选材与设计提供理论依据,为降低多米诺效应出现的频率,应最大限度地避免罐体本身与碎片的接触。     

An efficient approach to optimize the vibration mode of bar-type ultrasonic motors

The electromechanical coupled dynamic model of the stator of the bar-type ultrasonic motor is derived based on the finite element method. The dynamical behavior of the stator is analyzed via this model and the theoretical result agrees with the experimental result of the stator of the prototype motor very well. Both the structural design principles and the approaches to meet the requirements for the mode of the stator are discussed. Based on the pattern search algorithm, an optimal model to meet the design requirements is established. The numerical simulation results show that this optimal model is effective for the structural design of the stator.     

我国北方农牧交错带人类活动与环境的关系

初步分析了我国北方农牧交错带自新石器时代以来人类活动的基本特征和全新世以来环境演变的基本规律；指出该区人类活动及其文献进程具有深刻的环境演化背景，人类活动与环境演化具有显著的相关关系。认为人地关系的研究重点应放在工业革命以来的２００￣３００ａ内。     

锂膨润土的稳定性及在陶瓷涂料中的应用

探讨了锂基膨润土泥浆的悬浮特性和机理及其在陶瓷涂料中的应用效果，试验表明了锂基膨润土是一种性能优良的耐高温悬浮剂，并讨论了应用时应注意的问题。     

LA型陶瓷涂料的研制

讨论了ＬＡ型陶瓷涂料的制备，表明ＬＡ型陶瓷涂料性能好，成本低，值得推广。     

［Cu_4（S_5）_2（4－MePy）_4］·（4－MePy）簇合物的合成及表征

采用铜粉、硫粉、硫化钾及４－ＭｅＰｙ在常温密闭下直接合成标题化合物．它是不溶于水及常规有机溶剂的玫瑰红色的晶体．经元素分析、红外光谱、紫外光谱以及循环伏安等表征．