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Your search keyword '"Wan, Tian-Tian"' showing total 14 results
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14 results on '"Wan, Tian-Tian"'

10. Infectious Diseases

Author

Guo, Shu-Bin, primary, Wang, Jun-Yu, additional, Zhu, Xiao-Mei, additional, Zhu, Di, additional, Li, Rui-Qi, additional, and Wan, Tian-Tian, additional

Published
2020
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13. Reliability Evaluation Optimal Selection Model of Component-Based System

Author

Wan Tian Tian, Guo Yong, Ma Pei Jun, and Su Xiao Hong

Subjects
Engineering, Single model, business.industry, Component (UML), Software system, Growth model, business, Reliability (statistics), Reliability model, Selection (genetic algorithm), Reliability engineering
Abstract

If the components in a component-based software system come from different sources, the characteristics of the components may be different. Therefore, evaluating the reliability of a component-based system with a fixed model for all components will not be reasonable. To solve this problem, this paper combines a single reliability growth model with an architecture-based reliability model, and proposes an optimal selecting approach. First, the most appropriate model of each component is selected according to the historical reliability data of the component, so that the evaluation deviation is the smallest. Then, system reliability is evaluated according to both the relationships among components and the using frequency of each component. As the approach takes into account the historical data and the using frequency of each component, the evaluation and prediction results are more accurate than those of using a single model.

Published
2011

14. [Effects of Organic Carbon Content on the Residue and Migration of Polycyclic Aromatic Hydrocarbons in Soil Profiles].

Author

Fei JJ, Zhang ZH, Wan TT, and He FP

Abstract

The effects of total organic carbon content (TOC) on the migration of polycyclic aromatic hydrocarbons (PAHs) in the soil were investigated. This study analyzed the vertical properties of the concentrations and distributions of PAHs and TOC at various soil profiles from functionally different environmental regions including nature reserves, ploughs, orchards, farmlands, metropolitan areas, and industrial parks. The vertical migration properties of PAHs in soils were examined by conducting leaching experiments in soil columns. The concentrations of PAHs varied from region to region and showed strong, positive correlations with TOC in the same region. Furthermore, based on the leaching experiments, the transport abilities of PAHs were significantly influenced by TOC, although they could all be transported to the deep layers by TOC in soil columns. The downward migration of PAHs decreased with the increase in TOC and vice versa. The properties of the composition and structure of PAHs also had an obvious influence on their residues and migration in soil profiles at the same TOC conditions. In addition, the transport of PAHs was related to the amount of leaching water, the leaching time, and the additional PAHs.

Published
2017
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