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D. Živković N. Štrbac M. Sokić V. Andrić I. Jovanović M. Jovičić B. Andjelić S. Radosavljević 《Journal of Thermal Analysis and Calorimetry》2014,118(2):1369-1373
Preliminary results of physicochemical investigation of some archaeometallurgical findings from Kmpije locality in vicinity of Bor (Serbia) are presented in this paper. Ancient samples of prehistoric origin were investigated using different instrumental analytic methods—chemical, differential thermal, X-ray diffraction, and energy dispersive X-ray fluorescence analysis. Obtained results indicate to the presence of ancient metallurgical activities, so locality Kmpije may be considered as an archaeometallurgical site, which should be investigated more in future for more precise details. 相似文献
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Đ. Petrović A. Đukić K. Kumrić B. Babić M. Momčilović N. Ivanović Lj. Matović 《Journal of Radioanalytical and Nuclear Chemistry》2014,302(1):217-224
Ordered mesoporous carbon (OMC) was used as an adsorbent for the removal of pertechnetate (TcO4 ?) anion. The maximum uptake (93 %) of TcO4 ? was obtained after 60 min of contact. The adsorption of TcO4 ? is almost pH-independent in very wide pH region (from 4.0 to 10.0). Maximum K d of 6.6 × 103 cm3 g?1 was found at pH 2.0. TcO4 ? interacts with carboxylic functional groups present at the surface of the OMC by displacing the OH? ions with TcO4 ? via ion exchange mechanism. 相似文献
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Žarko P. Barbarić Stojadin M. Manojlović Boban P. Bondžulić Milenko S. Andrić Srđan T. Mitrović 《Optik》2014
New relationship of displacement signal using opposite sectors on a quadrant photodiode is derived. Standard and new displacement signals are analyzed in details. Through MATLAB® laser tracking simulation models, based on common and suggested approaches, detailed analysis is performed, and it is shown that better results for the new relationship signal processing are obtained. Within new relationship of displacement signal, the sensitivity of the system to the displacement of the spot increases and, hence, provides better accuracy in positioning up to 30%. 相似文献
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Ljiljana Petrović 《Stochastics An International Journal of Probability and Stochastic Processes》2018,90(2):200-213
The paper considers a statistical concept of causality in continuous time in the filtered probability spaces which is based on the Granger’s definition of causality. The given causality concept is then applied to the solution of the martingale problem (associated with the stochastic differential equation driven with semimartingales). More precisely, we show that the given causality concept is closely connected to the concept of extremality of measures for the solutions of the martingale problem, for the stopped martingale problem and for the local martingale problem. We also show the equivalence between some models of causality and local uniqueness (for the solutions of the martingale problem). 相似文献
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