Soil erosion, which is motivated by multiple external factors, decreases soil fertility and threatens the world’s agriculture production and terrestrial ecosystems. In southwest of China, arid-hot valleys of the Jinsha River are highly susceptible to soil erosion owing to the fragile ecosystem...

Blended coal combustion technology is being applied in many power plants as a clean coal combustion technology. In order to investigate the effects of different factors on the pore structure and fractal properties of the blended coal coke, a low-temperature nitrogen adsorption method and...

In the present study, a novel type of titanium matrix composite with a quasi-network structure was successfully fabricated by hot-press sintering Ti6Al4V powder and Ti2AlC precursor at 1200 ℃ and 25 MPa. To explore the effect of Ti2AlC content on the microstructure and properties of...

We study the problem of dynamically trading multiple futures contracts on different underlying assets subject to portfolio constraints. The spreads between futures and spot prices are modeled by a multidimensional scaled Brownian bridge to account for their convergence at maturity. Under this...

Measuring timely high-resolution socioeconomic outcomes is critical for policy making and evaluation, but hard to reliably obtain. With the help of machine learning and cheaply available data such as social media and nightlight, it is now possible to predict such indices in fine granularity....