Abstract: In a method for invitation behavior prediction, group behavior feature information of a first user of a group is obtained. In addition, group relationship feature information of a second user is obtained. Further, group architecture information of the group, the group behavior feature information of the first user, and the group relationship feature information of the second user are input to an invitation prediction model, to obtain a target member user and a candidate invitation user of the target member user. The invitation prediction model is obtained by training the invitation prediction model based on a plurality of sample groups in a training set, and group relationship feature information of associated users of member users in the plurality of sample groups. Invitation prediction information is sent to the target member user to prompt the target member user to add the candidate invitation user to the group.

Abstract: In a method for invitation behavior prediction, group behavior feature information of a first user of a group is obtained. In addition, group relationship feature information of a second user is obtained. Further, group architecture information of the group, the group behavior feature information of the first user, and the group relationship feature information of the second user are input to an invitation prediction model, to obtain a target member user and a candidate invitation user of the target member user. The invitation prediction model is obtained by training the invitation prediction model based on a plurality of sample groups in a training set, and group relationship feature information of associated users of member users in the plurality of sample groups. Invitation prediction information is sent to the target member user to prompt the target member user to add the candidate invitation user to the group.

Abstract: A galvanized coating layer production line is disclosed. The production line comprises sequentially arranging, according to a workflow, a sand-blasting machine, a fluxing machine, a first air knife, a preheating device, a hot-dip bath, a second air knife, and a cooling chamber. The fluxing machine, the first air knife, the preheating device, the hot-dip bath, and the second air knife are each provided with a moving passageway through which a workpiece may pass; and disposed between the apparatus are rolling conveyors along which workpieces move. Rebar is able to lie flat as it moves one-by-one between the apparatus during the process. This allows for highly efficient production and for the electroplating of long rebar. The production line is easy both to expand and to improve.

Abstract: A galvanising epoxy-coating production line includes a sandblasting machine an assisting plating machine, a first air knife, a first pre-heater, a hot dip tank, a second air knife, a second pre-heater, an epoxy spray chamber, and a cooling chamber, arranged sequentially in order of workflow. The assisting plating machine, the first air knife, the first pre-heater, the hot dip tank, the second air knife, the second pre-heater, and the epoxy spray chamber are provided with moving channels through which workpieces can pass. Between the devices is provided with a rolling conveyer on which the workpieces run. The production efficiency is high. The electroplated rebars are long.

Abstract: A snow and road sweeping vehicle with a brush body turning apparatus includes a vehicle body, a brush bracket, a brush body arranged on the brush bracket, and a drive mechanism. The snow and road sweeping vehicle further includes a rotating shaft assembly, at least two limiting holes, and a limiting assembly. The limiting assembly is selectively inserted into one of the limiting holes to position the brush bracket. The present invention can change the orientations of the brush bracket and the brush body to facilitate the operation and improve the sweeping efficiency.

Abstract: A sweeping car with one-brush includes a car body provided with wheels arranged on the bottom, a drive mechanism arranged on the car body and used for supplying power to the whole sweeping car, a brush arranged at an end of the car body and provided with a bracket and multiple bristles facing the ground and arranged on the bracket, a first transmission mechanism arranged between the drive mechanism and the brush and used for transmitting the power to the brush, a control mechanism provided with a control arm extending out from the other end of the car body. The control arm is provided with a control terminal connected to the drive mechanism.