This paper adopts GARCH model with GED distribution to estimate the conditional VaR in both upside and downside directions at the confidence level of 90% and 95%,and then utilizes the Granger causality in risk to uncover the extreme risk spillover effect between WTI and Daqing oil markets,the daily data of oil price in two markets ranging from May 2000 to May 2005.

This article studies the outburst risk when uncovering coal in crosscut one of the third coal layer in mine No.

Discussion on emergency mechanism of dike built with mattress of sand-filled long tubular sacks;

Analysis on probability of dyke damage and endangerment in Lower Yellow River;