Abstract: A method for user recognition and emotion monitoring based on a smart headset is provided. The smart headset includes an earplug part and a main body, wherein the earplug part is provided with a first microphone and a wearing detection sensor, and a housing of the main body is provided with a signal amplification circuit, a communication module, and a microcontroller. The wearing detection sensor is to detect whether a user wears the smart headset, and the first microphone is to obtain a sound signal in an ear canal. The sound signal is amplified, and then is outputted to the microcontroller. The amplified sound signal is transmitted by the microcontroller to a smart terminal paired with the smart headset to extract a heart sound signal characteristic, and legality of—identity of the user is validated and emotional state of the user is inferred according to the heart sound signal characteristic.

Abstract: This disclosure generally relates to power generation methods and systems based on gas turbine engines, and particularly to mobile and adaptive power generation systems and methods based on gas turbine engine for supplying mechanical and/or electrical power for fracturing operations at an oil wellsite. Various systems, platforms, components, devices, and methods are provided for flexibly and adaptively configure one of more gas turbines, hydraulic pumps, and electric generators to support both fracturing and electric demands at a well site. The disclosed implementations enable and facilitate a mobile, adaptive, and reconfigurable power system to provide both mechanical and electric power for hydraulic fracturing operation, which is convenient to set up for operation and for transport.

Abstract: A grasping end of a frog-style forceps relates to the technical field of medical instrument for spinal surgery, and comprises a grasping end tube and a pressing-rod sleeve. The pressing-rod sleeve is sleeved over the grasping end tube. Two opposite strip-shaped openings are axially provided on a side wall of the grasping end tube. Positioning spring sheets are disposed inside the strip-shaped openings. Positioning protrusions are disposed on inner sides of lower end portions of the two positioning spring sheets inside the strip-shaped openings at a lower portion of the grasping end tube. A position limiting protrusion is disposed inside the lower portion of the grasping end tube. The grasping end for a frog-style forceps does not need to align relatively small positioning protrusions with a slot on a screw seat, so that it is convenient and easy to assemble and very easy to dismantle the grasping end.