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8 results on '"Tong, Jiewei"'

4. Impacting Factors of Changes in Dynamic Viscosity and Interfacial Tension of Wood Xylem Sap.

Author

Wen, Liang, Wang, Xuan, Xu, Qin, Tong, Jiewei, Zhao, Wanwan, Zhang, Yaoli, Lv, Jianxiong, Cai, Liping, and Xia, Changlei

Subjects
DYNAMIC viscosity, INTERFACIAL tension, PLANT transpiration, XYLEM, ATOMIC absorption spectroscopy, GAS chromatography/Mass spectrometry (GC-MS), TREE growth
Abstract

The growth of trees is inseparable from the water transpiration in the xylem. To explore the mechanism of sap rising in the xylem, the monthly variation of the dynamic viscosity and interfacial tension of the xylem sap of different tree species and their impacting factors were analyzed. In this experiment, the dynamic viscosity and interfacial tension of the xylem sap of poplar and metasequoia were measured within one year, as well as the sap velocity of poplar. Gas chromatography–mass spectrometry and atomic absorption spectroscopy were used to detect the organic components and inorganic cations of the xylem sap of poplar and metasequoia. By analyzing the influence of organic components and the inorganic cation concentration of xylem sap on the dynamic viscosity and interfacial tension of xylem sap, this study revealed that the dynamic viscosity and the interfacial tension of poplar and metasequoia samples in different months changed in basically the same manner. However, the dynamic viscosity and the interfacial tension of the metasequoia samples were generally higher than those of the poplar samples. The dynamic viscosity of the xylem sap had an obvious exponential relationship with temperature, while the interfacial tension of the xylem sap had an inconspicuous linear relationship with temperature. In addition, disparate xylem structures of the broad-leaved tree poplar and the coniferous tree metasequoia led to different concentrations of organic components and inorganic cations in their xylem sap, which made a difference in the dynamic viscosity and interfacial tension between poplar and metasequoia samples. [ABSTRACT FROM AUTHOR]

Published
2023
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7. A hybrid ant colony optimization based on cloud model for OoS multicast routing problem

Author

Tong Jiewei, Li Guoxuan, Zhang Xiaoxia, and Sun Xuanyao

Subjects
Engineering, Mathematical optimization, Multicast, business.industry, Ant colony optimization algorithms, Quality of service, 020206 networking & telecommunications, Cloud computing, 02 engineering and technology, ComputingMethodologies_ARTIFICIALINTELLIGENCE, 0202 electrical engineering, electronic engineering, information engineering, Entropy (information theory), 020201 artificial intelligence & image processing, Algorithm design, business
Abstract

This paper presents a novel hybrid ant colony optimization approach (ACO&CM) to solve quality of service (QoS) multicast routing problem. The main feature of this hybrid algorithm is to hybridize the solution construction mechanism of the ACO with cloud model (CM). Moreover, the hybrid algorithm considers both solution diversification and solution quality, and it adopts cloud model to avoid excessive use of nodes and making algorithm fall into local optimal solution by changing pheromone trail. The method has both the advantages of ant colony optimization, the ability to find the higher performance solutions, and that of cloud model, the ability to explore different parts of the solution space and to find better solutions. Finally, the experimental results have shown that the ACO&CM algorithm is to be very efficient and competitive in terms of solution quality.

Published
2017
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