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Stability constants of Sb^5+with Cl−and thermodynamics of Sb−S−Cl−H2O system involving complex behavior of Sb with Cl

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Transactions of Nonferrous Metals Society of China 2020年第12期30卷 3379-3389页

作者： Gang LI Yun-tao XIN Xiao-dong Lü Qing-hua TIAN Kang YAN Long-gang YE College of Materials Science and Engineering Chongqing UniversityChongqing 400044China School of Metallurgy and Environment Central South UniversityChangsha 410083China School of Metallurgical Engineering Jiangxi University of Science and TechnologyGanzhou 341000China College of Metallurgy and Material Engineering Hunan University of TechnologyZhuzhou 412007China

The stability constants of Sb^5+with Cl−as well as thermodynamics of the Sb−S−Cl−H2O system were *** stability constants of Sb5+with Cl−were obtained by theoretical calculations of the absorbance of a Sb5+-containing solution at different Cl^−concentrations,which was detected by spectrophotometric analysis at certain wavelengths of light(380 nm).The logarithmic values versus 10 of stability constants of Sb^5+with Cl−were 1.795,3.150,4.191,4.955,5.427 and 5.511,respectively,and partly filled the data gaps in the hydrometallurgy of *** presence and distribution of pentavalent antimony compounds under different conditions were analyzed based on equilibrium *** equilibrium calculations were performed for Sb−S−Cl−H2O system,which included the complex behavior of Sb with Cl,and the equilibrium equations of related reactions in this system were integrated into the potential−pH diagram.

关键词： complex behavior stability constant thermodynamics Sb−S−Cl−H2O system

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complex behaviors of a Simple Traffic Model

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Communications in Theoretical Physics 2006年第5X期46卷 952-960页

作者： GAO Xing-Ru Department of Physics and Institute of Theoretical Physics Beijing Normal University Beijing 100875 China Fundamental Teaching Department Beijing Union University Beijing 100101 China

In this paper, we propose a modified traffic model in which a single car moves through a sequence of traffic lights controlled by a step function instead of a sine function. In contrast to the previous work [Phys. Rev. E 70 （2004） 016107], we have investigated in detail the dependence of the behavior on four parameters, ω,α,η and α1, and given three kinds of bifurcation diagrams, which show three kinds of complex behaviors. We have found that in this model there are chaotic and complex periodic motions, as well as special singularities. We have also analyzed the characteristic of the complex period motion and the essential feature of the singularity.

关键词： traffic model complex behavior chaos bifurcation diagram singularity

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Analysis and Predictability of Dry Spell Lengths Observed in Synoptic Stations of Benin Republic (West Africa)

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American Journal of Climate Change 2021年第4期10卷 597-618页

作者： Médard Noukpo Agbazo Joseph Adébiyi Adéchinan Gabin Koto N'gobi Joseph Bessou International Chair in Mathematical Physics and Applications (ICMPA-UNESCO Chair) Université d’Abomey-Calavi Abomey-Calavi Bénin Laboratoire de Physique du Rayonnement (LPR) Université d’Abomey-Calavi Abomey-Calavi Bénin Département de Physique Faculté des Sciences et Techniques Université Nationale des Sciences Technologies Ingénierie et Mathématiques (UNSTIM) Abomey Bénin Agence Nationale de la Météorologie du Bénin (METEO BENIN) Cotonou Bénin

The complex behavior and predictability of the Dry Spell Lengths (DSL) series obtained in Benin synoptic stations, from 1951 to 2010 are analyzed in this paper using a fractal approach. The synoptic stations are located in Cotonou, Bohicon, Save (subequatorial climate), and Parakou, Natitingou, Kandi (Sudanian climate). The DSLs are computed by considering four thresholds level, R0 = {1.0, 1.5, 2.0 and 5.0} mm/day. The fractal trace is estimated for dry spell density by the mean of the “Dry Spell Spell” (DSS) n-index. The rescaled range method is used to determine the predictability of DSL. By analyzing the DSS, results show that low DSS n-index values (n-index 0.4) occur preferentially in the southern part. Therefore, during 1951-2010, the Sudanian region presents frequent wet spells, alternated with short dry spells than in the subequatorial one. However, a high degree of long dry spell persistence, followed by short dry events is observed in the subequatorial region than in the Sudanian one. The longest DSL is observed in the subequatorial region, especially in Cotonou. Except for the Kandi station, the DSLs series obtained at synoptic stations are characterized by persistence. Therefore, autoregressive processes could be applied to the DSL series. Generally, the physical process governing dry spells observed at Save, Natitingou, and Bohicon are consistently predictable than the process governing the stations of the Cotonou and Parakou. However, at Kandi station, the DSL process approximates the usual Brownian motion, and it is, therefore, unpredictable or difficult to predict.

关键词： Hurst Exponent N-Index DSL Predictability complex behavior Benin

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