In order to simplify the structure of the ocean drilling heave compensation system and reduce the energy consumption of active drawworks heave compensation system, a new type of semi-active drawworks heave compensation system was designed through structure design, system modeling and internal model PID robust displacement controller Oversized Tee d
Prospects of and challenges to natural gas industry development in China
An unprecedented breakthrough has been made over the past decades in natural gas industry, which helps improve energy mix and promote the low-carbon economy in China.With such abundant hydrocarbon resources, China owns two intensive oil and gas producing blocks in the Ordos Basin and Xinjiang province and two other concentrated gas producing blocks
Predation of a mustached bat, Pteronotus sp. (Mormoopidae), by an Amazon tree boa, Corallus hortulanus (Boidae), in the Brazilian Amazon
ABSTRACT Several bat species use caves as roosts and some of these caves can harbor high concentrations of individuals.Such caves 148 may represent opportunities for certain predators, benefiting from the concentration of potential prey.Here, we report the predation of a Pteronotus bat by a Corallus hortulanus in the Brazilian Amazon.On three occas