Abstract: The present disclosure describes techniques for determining performance of a classifier. A first machine learning model and a second machine learning model may be trained by aggregating updates to the first machine learning model and the second machine learning model received from a plurality of client computing devices. A cumulative distribution function (CDF) associated with a distribution of the positive samples in the user data may be estimated using the trained first machine learning model. A probability density function (PDF) associated with a distribution of the negative samples in the user data may be estimated using the trained second machine learning model. An integration-based computation of an area under the receiver operating characteristic curve (AUC) of the classifier may be performed using the PDF and the CDF.

Abstract: Disclosed are an information interaction method and apparatus, and an electronic device. A specific implementation of the method comprises: acquiring a first near-field communication signal; extracting, from the first near-field communication signal, first pairing information for pairing with a multimedia conference terminal; and sending the first pairing information to a server, so as to instruct the server to determine a target multimedia conference terminal on the basis of the first pairing information and to establish a communication connection between the target multimedia conference terminal and a user terminal device. By means of the implementation, the convenience for a user to control a multimedia conference terminal is improved. In addition, the overall cost of a multimedia conference system can be reduced.

Abstract: The present application discloses a proximity pin for supporting a substrate in a substrate processing apparatus. The proximity pin includes a pin head part and a support pad part. The pin head part is configured to support the substrate in the substrate processing apparatus, and includes a first end and a second end opposite to the first end. The first end is configured to be in contact with the substrate placed on the proximity pin. The support pad part is connected to the pin head part at the second end of the pin head part, and has a diameter larger than a maximum diameter of the pin head part.

Abstract: Related to the field of security protection, a video surveillance method, apparatus, and system, which can implement local magnification of a moving object in a surveillance scene. The method includes obtaining, by a client, an intelligent analysis alarm and moving track information of at least one alarm triggering object, and adjusting a window layout of a user interface according to the intelligent analysis alarm, where the intelligent analysis alarm is triggered by the client, a surveillance platform, or a camera when determining that there is an intrusion object in a surveillance scene according to an intelligent analysis strategy; and performing, by the client, local magnification on the at least one alarm triggering object according to moving track information of the at least one alarm triggering object. The present disclosure is applicable to video surveillance of important places.

Abstract: Related to the field of security protection, a video surveillance method, apparatus, and system, which can implement local magnification of a moving object in a surveillance scene. The method includes obtaining, by a client, an intelligent analysis alarm and moving track information of at least one alarm triggering object, and adjusting a window layout of a user interface according to the intelligent analysis alarm, where the intelligent analysis alarm is triggered by the client, a surveillance platform, or a camera when determining that there is an intrusion object in a surveillance scene according to an intelligent analysis strategy; and performing, by the client, local magnification on the at least one alarm triggering object according to moving track information of the at least one alarm triggering object. The present disclosure is applicable to video surveillance of important places.

Abstract: A thin-wall tube connecting assembly includes a connecting bar, and a tightening nut connected to the connecting bar through threads. The connecting bar is in a hollow tube-shape. One end of the connecting bar includes an expansion cone having an exterior diameter that is larger than that of other parts of the connecting bar. Another end of the connecting bar includes exterior threads. An elastic tube sits between the expansion cone of the connecting bar and a tightening nut. A rigid ring wraps around the exterior of the elastic tube, which shares a same axis with the tightening nut. A tube to be connected has an interior diameter that is equal to or larger than the exterior diameter of the expansion cone of the connecting bar. The rigid ring has an interior diameter that is equal to or larger than an exterior diameter of the tube to be connected.

Abstract: A solar water heater including an outer housing and a heat absorbing water tank fixed onto the interior surface of the outer housing. The heat absorbing water tank may have a water entrance and a water exit. A heat insulating layer may be filled underneath the heat absorbing water tank between the heat absorbing water tank and the outer housing, and a transparent heat insulating board may be placed on top of the heat absorbing water tank. The heat absorbing water tank may have web system formed by tubules, or may be in a rectangular shape with reinforced concaves. The heat absorbing water tank may be manufactured by using plastic materials.

Abstract: A bath apparatus or a shower machine includes a housing and a showerhead mounted therein. The housing includes a door opening where a door body is installed. The housing has an egg-shell shape with the door opening provided at a front side and a back panel provided at a rear side. A slide rail fixedly connected to an inside wall of the housing, extends from a rear end that is fixed to the back panel to a front end at the door opening. The front end of the slide rail includes a locking clip body that matches a locking clip socket fixed on the housing. A sliding block is installed on the slide rail and fixedly connected to a supporting rod. A top end of the supporting rod is hinge jointed to the door body.

Abstract: A thin-wall tube connecting assembly includes a connecting bar, and a tightening nut connected to the connecting bar through threads. The connecting bar is in a hollow tube-shape. One end of the connecting bar includes an expansion cone having an exterior diameter that is larger than that of other parts of the connecting bar. Another end of the connecting bar includes exterior threads. An elastic tube sits between the expansion cone of the connecting bar and a tightening nut. A rigid ring wraps around the exterior of the elastic tube, which shares a same axis with the tightening nut. A tube to be connected has an interior diameter that is equal to or larger than the exterior diameter of the expansion cone of the connecting bar. The rigid ring has an interior diameter that is equal to or larger than an exterior diameter of the tube to be connected.

Abstract: A bath apparatus or a shower machine includes a housing and a showerhead mounted therein. The housing includes a door opening where a door body is installed. The housing has an egg-shell shape with the door opening provided at a front side and a back panel provided at a rear side. A slide rail fixedly connected to an inside wall of the housing, extends from a rear end that is fixed to the back panel to a front end at the door opening. The front end of the slide rail includes a locking clip body that matches a locking clip socket fixed on the housing. A sliding block is installed on the slide rail and fixedly connected to a supporting rod. A top end of the supporting rod is hinge jointed to the door body.