In response to the Covid-19 pandemic, the Chinese government has utilized and pragmatically adjusted existing welfare institutions to ensure social and economic stability. This report describes the Chinese social policy responses in 2020 to mitigate the effects of the coronavirus crisis and...

This paper provides a comprehensive analysis of machine learning methods applied in short-term exchange rate forecast and portfolio evaluation. The models we used include: random forest, gradient boosting decision tree (GBDT) and extreme gradient boosting (XGBoost). We provide evidence that...

Low temperature and low air pressure in the upper atmosphere would cause low fuel inlet temperature and air flowrate in aero-engine combustion chamber. A system including a burner normally used in actual aero engines was established to study swirl-stabilized kerosene spray combustion at...

A global modeling method is developed to describe the relationship between multi-type parameters and fuel cell performance, which significantly contributes to efficient performance prediction of fuel cell system. The multi-type parameters include operating parameters, geometric parameters of the...

Accurate crop growth and radiation use efficiency (RUE) measurements under optimal growth conditions are required to predict grain yield near the genetic growth potential and estimate climate change effects on crop production. Research was conducted to quantify RUE of maize during the whole...