Abstract: An inversion method of river course depth based on a mathematical model and remote sensing of water depth-water surface area includes the following steps: constructing the first mathematical model; calculating the relation function between the water flowing cross-section area, the triangle area at two sides and the water depth as well as the flow path, and substituting the relation functions into the first mathematical model to obtain the second mathematical model; transforming the second mathematical model into the mathematical model of water level-water surface area; solving the unknowns in the mathematical model, and substituting the unknowns into the second mathematical model to obtain the third mathematical model; and substituting the water surface area extracted by the remote sensing into the third mathematical model to obtain the water depth of the river course.

Abstract: A medical device includes an actuator, a connecting mechanism, and a control mechanism connected to the actuator by the connecting mechanism. The control mechanism includes a firing assembly, a limiting assembly connected to the firing assembly, and a reset mechanism connected to the limiting assembly. The firing assembly can move in a first direction after being fired to realize an action of the actuator. The limiting assembly can limit the firing assembly not to move in a second direction after the firing assembly moves in the first direction. After movement of the firing assembly is limited, the reset mechanism can adjust position of the limiting assembly to release the limit on the firing assembly and allow the firing assembly to move in the second direction. An operator can easily hold the medical device (e.g., a stapler) with one hand while completing a reset action of a firing rack.

Abstract: A cyclonic separation device and a vacuum cleaner including the cyclonic separation device are disclosed. The cyclonic separation device includes a housing and a cyclonic separation device. The cyclonic separation device is provided in the housing to allow dirt in a dust-containing airflow to be separated. The cyclonic separation device includes a first-stage cyclone separator and second-stage cyclone separators located downstream of the first-stage cyclone separator in a flow direction of the airflow. The second-stage cyclone separators surround the first-stage cyclone separator. The first-stage cyclone separator includes an air guide channel and a first-stage cyclone channel surrounding a part of the air guide channel. The dust-containing airflow enters, from the air guide channel, the first-stage cyclone channel for cyclonic separation and then enters the second-stage cyclone separators again through the air guide channel.

Abstract: A medical device includes an actuator, a connecting mechanism, and a control mechanism connected to the actuator by the connecting mechanism. The control mechanism includes a firing assembly, a limiting assembly connected to the firing assembly, and a reset mechanism connected to the limiting assembly. The firing assembly can move in a first direction after being fired to realize an action of the actuator. The limiting assembly can limit the firing assembly not to move in a second direction after the firing assembly moves in the first direction. After movement of the firing assembly is limited, the reset mechanism can adjust position of the limiting assembly to release the limit on the firing assembly and allow the firing assembly to move in the second direction. An operator can easily hold the medical device (e.g., a stapler) with one hand while completing a reset action of a firing rack.

Abstract: A cyclonic separation device and a vacuum cleaner including the cyclonic separation device are disclosed. The cyclonic separation device includes a housing and a cyclonic separation device. The cyclonic separation device is provided in the housing to allow dirt in a dust-containing airflow to be separated. The cyclonic separation device includes a first-stage cyclone separator and second-stage cyclone separators located downstream of the first-stage cyclone separator in a flow direction of the airflow. The second-stage cyclone separators surround the first-stage cyclone separator. The first-stage cyclone separator includes an air guide channel and a first-stage cyclone channel surrounding a part of the air guide channel. The dust-containing airflow enters, from the air guide channel, the first-stage cyclone channel for cyclonic separation and then enters the second-stage cyclone separators again through the air guide channel.

Abstract: A hand held electronic game having sensors requiring the user to perform functions similar to those required during the activity simulated by the game. In a hand held electronic bowling game, both finger-movement sensors and game-moving sensors require the user to grip and swing the game housing much like swinging a bowling ball while finger-receiving sensors measure movement in the fingers and game housing-movement sensors measure the forcefulness and speed of the user's swing with the ball. The sensors include printed circuit boards and the game-moving sensor can utilize a LED and a photodiode along with a periodically transparent extension, which moves between the LED and the photodiode to determine the force of the swing by centrifugal force.