Boxuan Li — Page 2 | Searcharxiv

arXiv2020

Stable Community Structures and Social Exclusion

In this paper we study social exclusion in social (information) networks using a game-theoretic approach, and study the stability of a certain class community structures that are a Nash equilibrium. The main result of our analysis shows that all stable community structures (Nash equilibria) in this class are community structures under which some agents are socially excluded, and do not belong to any of the communities. This result is quite striking as it suggests that social exclusion might be the "norm" (an expected outcome) in social networks, rather than an anomaly.

math.OC↗

arXiv2017

Probing Laser-induced Microenvironment Changes in Room Temperature Ionic Liquids

Modulating heterogeneous microstructure in room temperature ionic liquids (RTILs) by external stimuli is an important approach for understanding and designing the external field induced chemical reactions in natural and applicable systems. Here, we report for the first time the redistribution of oxygen molecules in RTILs due to laser-induced microstructure changes probed by triplet excited state dynamics of porphyrin and rotational dynamics of coumarin 153. A remarkably long-lived triplet excited state of porphyrin is observed in air-saturated ionic liquid with the changes of microstructure after irradiation, suggesting that more charge-shifted O2 induced by external laser field move into the polar domains of ionic liquid [C8mim][PF6] from nonpolar domains through electrostatic interactions. The results presented here suggest that the heterogeneous systems of ionic liquids upon external stimuli can be designed for those oxygen-related chemical reactions with extensive inspirations for potential applications in lithium-air batteries, gaseous sensing, photoelectrical catalysis and so on.

physics.chem-ph↗