Newly deposited mercury (Hg) is more readily methylated to methylmercury (MeHg) and accumulates in rice than ambient Hg in soil. However, the geochemical fractionation of newly deposited (“new” Hg) Hg in the soil is still unknown. In this study, enriched stable Hg isotope was employed to...

This paper is to analyze how housing prices affect the consumption of urban households in China based on their asset allocations. We first identify household types based on their liquid and illiquid assets allocations, and in particular, a group unique to China named poor non-hand-to-mouth...

Electronic structure design to optimize the hydrogen adsorption/desorption balance on the catalysts plays a key role in improving the catalytic efficiency of the low-load Pt-based catalyst in the hydrogen evolution reaction (HER). In this study, we modulate the electronic structure of Pt...

The Cr 2 O 3 content of vanadium slag considerably affects its phase composition, micromorphology, elements distribution, and further vanadium extraction by calcification roasting–acid leaching. In this work, remelting and crystallization were used to prepare vanadium slag with different Cr 2...

In the present paper we investigate the precise large deviations for heavy-tailed random sums. First, we obtain a result which improves the relative result in Klüppelberg and Mikosch (J. Appl. Probab. 34 (1997) 293). Then we introduce a more realistic risk model than classical ones, named the...

In this paper, we prove the max-sum equivalence of random variables satisfying two conditional dependence assumptions. Besides, we also discuss the interrelationship between the above two conditional dependence assumptions. The obtained results improve and generalize some existing results.

The thesis analyzes the role of small-and-medium-sized enterprises of county in promoting county economy: the small-and-medium-sized enterprises of county become the material basis of developing production and boosting county economy; the small-and-medium-sized enterprises of county become the...