Abstract In response to the frequent occurrence of high-energy microseismic events in coal mines in China, a back propagation neural network (BPNN) prediction model based on surface subsidence data has been proposed to provide a basis for safely and efficiently predicting coal mine disasters.Theoretical research on the relationship between surface

Abstract Many pollinators, including bumble bees, are in decline.Such declines are known to be driven by a number of interacting factors.Decreases in bee cowboys ps5 controller populations may also negatively impact the key ecosystem service, pollination, that they provide.Pesticides and parasites are often cited as two of the drivers of bee declin

Miniature hydraulic actuators are especially suitable for narrow-space and harsh environment arrangement.However, when using thin and long hoses to connect components, the volume expansion caused by pressurized oil inside can have significant adverse effects on the performance of the miniature system.Moreover, the volumetric variation relates to ma

3-nitro-1,2,4-tri-azol-5-one (NTO) is a high energy insensitive explosive.To study the shock initiation process of NTO-based polymer bonded explosive JEOL-1 gassflaske (32%octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine (HMX), 32% NTO, 28% Al and 8% binder system), the cylinder test, the gap experiments and numerical simulation were carried out.Fi

Observations of a comprehensive suite of inorganic and organic trace gases, including non-methane hydrocarbons (NMHCs), halogenated organics and oxygenated volatile organic compounds (OVOCs), obtained from the NASA DC-8 over copyright during the ARCTAS aircraft campaign in July 2008 illustrate that convection is important for redistributing both lo