Beijing Institute of Mathematical Sciences and Applications

How Are Green Financial Markets Linked to Green Cryptocurrency Return States? Evidence from a Cross-Quantilogram Approach

This paper examines directional quantile dependence from green bonds, clean energy markets, and carbon markets to the return states of five literature-classified green cryptocurrencies. Using daily returns from 25 September 2019 to 23 May 2025, we estimate static cross-quantilogr...

A new receptivity mechanism for the second-mode instability in hypersonic boundary layers

Direct numerical simulations of the flow over a compound delta-wing model reveal a novel receptivity mechanism for the second-mode instability in hypersonic boundary layers. This mechanism involves disturbances that propagate obliquely upward from the wall, interact with the shoc...

Enterotype signatures of multi-stressor exposure inform conservation strategies for mountain bumblebees of the subgenus Pyrobombus

Bees often exhibit gut microbiome-defined enterotypes impacting their health and pollination services. Bumblebees, keystone pollinators in montane and agriculture ecosystems, face significant population declines might linked to gut parasites, pathogens, and antibiotic exposure; h...