Abstract: A method for predicting a day-ahead wind power of wind farms, comprising: constructing a raw data set based on a correlation between the to-be-predicted daily wind power, the numerical weather forecast meteorological feature and a historical daily wind power; obtaining a clustered data set and performing k-means clustering, obtaining a raw data set with cluster labels, and generating massive labeled scenes based on robust auxiliary classifier generative adversarial networks; determining the cluster label category of the to-be-predicted day based on the known historical daily wind power and numerical weather forecast meteorological feature, and screening out multiple scenes with high similarity to the to-be-predicted daily wind power based on the cluster label category; and obtaining the prediction results of the to-be-predicted daily wind power at a plurality of set times based on an average value, an upper limit value and a lower limit value of the to-be-predicted daily wind power.

Abstract: A boxing speedball includes a fixed base detachably connected to a solid object, a ball body, a rebound device arranged at the upper part of the ball body, and a connector configured to connect the rebound device to the fixed base. The fixed base and the connector are adjustable and fastened through a fastener. A frictional resistance device is further provided between the fixed base and the connector, and is configured to increase the frictional force area between the fixed base and the connector. The boxing speedball increases the frictional force area at the connection, increases the friction force itself, improves the security of the connection, and is less likely to be twisted and damaged.

Abstract: The present invention provides a boom system, comprising a plurality of joint arms sequentially hinged through a horizontal hinge shaft, and further comprising: mounting two length sensors on each joint arm, wherein one length sensor measures the length of a corresponding joint arm after deformation, and the other length sensor measures the length between it and the distal end of the corresponding joint arm, and there is a preset distance between the two length sensors; mounting a dip angle sensor on each joint arm, and obtaining the angle between the connection line between the two length sensors and a reference plane; a processor which obtains boom system distal end position parameters according to the detection results of the dip angle sensor and the length sensors.

Abstract: A method for treating and maintaining floors cleans the floor and restores an optimum coefficient of friction. The method involves a restoring phase and a cleaning phase, in which the cleaning phase is performed using the same solution as in the restoring phase, but in a diluted form. The method is applicable to cleaning solid hard floors such as those made of unglazed quarry tiles, glazed ceramic tiles and cement.

Abstract: A mop head comprising a plurality of absorbent strands and an abrasive pad located close to a first ends of the strands may be used in a conventional manner to perform abrasive point load mopping. In a method of abrasive point load mopping, the abrasive pad mechanically breaks up surface contaminants that have accumulated on a kitchen floor without substrate surface deterioration. No special skills, special cleaning solutions or special equipment are required in order to effectively improve the floor's coefficient of friction and thereby reduce the risk of injuries from slips and falls. In one preferred embodiment, the mop head also includes a second abrasive pad located at the mop handle attachment, intermediate the first abrasive pad and the handle.