Abstract: A surface water quality monitoring method based on a high spatial resolution satellite includes: step 1. building standard surface water quality pools by mixing natural water bodies with clean water in different proportions to obtain surface water quality data; step 2. obtaining high spatial resolution remote sensing images for processing; step 3. identifying remote sensing bands with higher correlation through correlation analysis by presetting ratio values of remote sensor data bands and the standard surface water quality pools; step 4. building a water quality parameter retrieval model, and comparing and retrieving the remote sensing bands with higher correlation and the surface water quality data to obtain water quality data; and step 5. identifying abnormal points of the water quality based on the water quality data and water quality data threshold of the surface water.

Abstract: An open-ear Bluetooth® earphone includes an earphone body and a support frame. The support frame is configured to be plugged into a cavum concha of a wearer. The earphone body is provided with an audio source, and the support frame is installed on the earphone body and corresponds to the audio source. When in use, the support frame is configured to be firmly plugged into the cavum concha of the wearer to allow the earphone body to be worn on the ear of the wearer. The audio source corresponds to the ear canal of the wearer through the support frame, so that the sound emitted from the audio source is transmitted into the ear canal through the support frame. The audio source is directly opposite of the ear canal through the support frame to shorten the distance between the audio source and the ear canal.

Abstract: An open-ear earphone includes a housing, a chamber is provided inside the housing, a speaker is provided inside the chamber and divides the chamber into a front chamber and a rear chamber. The housing is provided with a first sound hole and a second sound hole. The front chamber is communicated to the outside through the first sound hole, and the rear chamber is communicated to the outside through the second sound hole. The rear chamber includes a first volume down chamber and a second volume down chamber communicated to the first volume down chamber, and the first volume down chamber is located between the speaker and the second volume down chamber. The sound wave in backward motion generated by the speaker is transmitted to the outside from the second sound hole after being reduced by the first volume down chamber and the second volume down chamber.

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.