In order to study the dynamic changes in gas concentration, to reduce gas hazards, and to protect and improve mining safety, a new method is proposed to predict gas concentration. The method is based on the opposite degree algorithm. Priori and posteriori values, opposite degree computation,...

The rapid spread of new coronaviruses throughout China and the world in 2019-2020 has had a great impact on China's economic and social development. As the backbone of Chinese society, Chinese universities have made significant contributions to emergency risk management. Such contributions have...

Since the 2008 Financial Crisis, stress tests based on extreme-yet-plausible scenarios have become a preferred method of assessing risk for large financial institutions, yet scenario choice has largely been ad-hoc. We propose a principled methodology to choose scenarios by minimizing the...

The wastewater treatment performance in an inverted A2/O reactor supplemented with fermentation liquid of primary sludge was explored comparing to commercial carbon sources sodium acetate and glucose. Similar COD removal rate was observed with the effluent COD stably reaching the discharge...

Polycyclic aromatic hydrocarbons (PAHs) and their nitrated derivatives (NPAHs) attract continuous attention due to their outstanding carcinogenicity and mutagenicity. To investigate the seasonal and diurnal variations, sources, formation mechanism and health risk assessment of PAHs and NPAHs,...