Abstract: A vacuum cleaner includes a dust collection barrel and a head assembly detachably assembled to the dust collection barrel. The head assembly includes a filter and a fan having an axis of rotation. An airflow path is defined between an inlet of the vacuum cleaner and an outlet of the vacuum cleaner during operation, the airflow path including a first path portion extending from the filter to the fan. The filter is located on a radial side of the fan relative to the axis of rotation. The fan and the filter are arranged along a straight-line segment, the straight-line segment defining a maximum dimension of the head assembly in a radial direction. The first path portion includes an axial path segment extending in a direction substantially parallel to the axis of rotation of the fan. The axial path segment does not intersect the straight-line segment. Accordingly, the head assembly can have a compact size.

Abstract: A harmonic reducer includes a power shaft, a wave generator mounted on the power shaft, a circular spline including internal teeth, a flex spline including external teeth and configured to receive the wave generator to cause the external teeth to mesh with the internal teeth progressively as the wave generator rotates. The harmonic reducer further includes a bearing system configured to support the power shaft, and the bearing system includes at least one first bearing and a second bearing located at a first side of the wave generator.

Abstract: A method includes obtaining a first set of coordinates of the at least three points in a robot coordinate system and a second set of coordinates of the at least three points in a touch screen coordinate system; causing the conveyor to move from the first position to a second position different from the first position; obtaining a third set of coordinates of the at least further three points in the robot coordinate system and a fourth set of coordinates of the at least three further points in the touch screen coordinate system; and determining a conveyor coordinate of the conveyor in the robot coordinate system based on the first set of coordinates, the second set of coordinates, the third set of coordinates and the fourth set of coordinates.

Abstract: A content recommendation method is provided. A first feature representation of a first user and a second feature representation of a second user are obtained. A cluster center corresponding to the first user is determined. An extra-domain feature representation and intra-domain feature representation of the first user are obtained. The intra-domain feature representation is based on mapping the extra-domain feature representation with the mapping relationship function. A target feature representation of the first user is determined based on the intra-domain feature representation and the first feature representation. Target content that matches the target feature representation of the first user is determined. The target content is pushed to the first user.

Abstract: The present discloses provides the use of tributyrin as an additive for embryonic development culture medium in vitro, in the present disclosure, the tributyrin is applied as an additive to the development culture medium of mouse embryos in vitro for the first time, the tributyrin can significantly increase the rate of blastocyst, and reduce the ROS content in the embryos, improve the mitochondrial membrane potential in the embryos, increase the ATP level and the expression of antioxidant genes in the embryos, improve the DNA methylation and histone modification level in the embryos, promote the embryos development in vitro; In addition, tributyrin, as natural antioxidant and apparent drug, which is safe, non-toxic and side effects; the tributyrin provides strong support for the efficient embryos development of human assisted reproductive technology, mammalian fertilization embryos, parthenogenetic embryos and somatic cell cloned embryos and other embryo engineering technologies in vitro.

Abstract: Disclosed are an organic proton-type ionic liquid, a film with a two-dimensional perovskite pure-phase quantum well structure, a preparation method and use thereof. The organic proton-type ionic liquid has a chemical formula of RNH3+·CH3COO? or RNH3+·RCOO?, where R represents an alkyl group of C4-8 or a phenyl group, preferably, the chemical formula thereof is CH3(CH2)3NH3+·CH3COO?. The organic proton-type ionic liquid can be used to prepare perovskite material, the perovskite film prepared thereby can form a pure-phase single quantum well, with a crystal grain size therein reaching a level of micrometers or even millimeters.

Abstract: An ultrasound image processing method, comprising: acquiring an ultrasound image in a real-time ultrasound scanning process, the ultrasound image being generated by processing an ultrasonic echo signal of a currently scanned site acquired by a probe; automatically determining the currently scanned site in the real-time ultrasound scanning process; automatically selecting, from a plurality of image processing tools, an image processing tool corresponding to the currently scanned site, wherein the plurality of image processing tools correspond to a plurality of scanned sites of a scanned subject, respectively; and processing the ultrasound image using the automatically selected image processing tool.

Abstract: Embodiments of the present disclosure provide a robot. The robot arm link includes a first arm link; a hollow shaft extending along a first axis thereof and coupled to the first arm link; a first stage reduction assembly coupled to a power source of the robot; and a second stage reduction assembly comprising: an input coupled to an output of the first stage reduction assembly and adapted to rotate about a second axis offset from the first axis; and an output coaxially arranged on a periphery of the hollow shaft and adapted to engage with the input to cause a rotation of the first arm link via the hollow shaft.

Abstract: An electric appliance includes a memory storing instructions and a processor configured to call and execute the instructions to control a first device to acquire a user instruction for a second device, generate an operation instruction for the second device based on the user instruction, and send the operation instruction to the second device to control the second device to perform a corresponding target operation. The first device is one of a clothes treatment device and a floor cleaning device, and the second device is another one of the clothes treatment device and the floor cleaning device.

Abstract: Embodiments of the present disclosure relate to a gearbox housing. The gearbox housing has a housing body and an annular gear. The housing body comprises an annular support and a lateral portion provided at a side face of the annular support. The lateral portion has a hole formed thereon for an input shaft to pass through. The annular gear is provided inside of the housing body along a radial direction and adapted to couple to the annular support, wherein a plurality of teeth are circumferentially provided at an inner side of the annular gear. A gear wheel with an output shaft is adapted to couple to the plurality of teeth.

Abstract: A method of model training includes obtaining a data set for training an interest alignment model of cross domain recommendation, the data set includes first domain data and second domain data. The method also includes performing a first feature extraction on the first domain data according to the interest alignment model to obtain a first domain feature representation and performing a second feature extraction on the second domain data according to the interest alignment model to obtain a second domain feature representation. Further, the method includes performing an interest alignment between the first domain and the second domain according to the interest alignment model based on the first domain feature representation and the second domain feature representation; and training the interest alignment model in a direction that reduces at least one of a first loss and a second loss, to obtain a trained interest alignment model.

Abstract: A content recommendation method is provided. A first feature representation of a first user and a second feature representation of a second user are obtained. A cluster center corresponding to the first user is determined. An extra-domain feature representation and intra-domain feature representation of the first user are obtained. The intra-domain feature representation is based on mapping the extra-domain feature representation with the mapping relationship function. A target feature representation of the first user is determined based on the intra-domain feature representation and the first feature representation. Target content that matches the target feature representation of the first user is determined. The target content is pushed to the first user.

Abstract: A fixing apparatus for use with an industrial robot and a method of measuring a backlash of a gear. The industrial robot includes a first arm and a second arm connected to the first arm. The fixing apparatus includes a first securing component configured to couple to the first arm and a second securing component configured to couple to the second arm. When the first securing component is coupled to the first arm and the second securing component is coupled to the second arm, at least one of the first arm and the second arm is remained at a non-gravity position.

Abstract: Robot arm link (100) comprises a body made of non-metallic material, a transmission cable (102) made of conducive material and embedded within the body (101), and at least one connector (103) arranged on the body (101) and coupled to the transmission cable (102), each connector (103) adapted to be electrically connected to a connector (1031) of a further robot arm link (1001) of a same specification, a sensor (301), or a power source (302) of the robot (200). By embedding the transmission cable (102) within the non-metallic material to form the robot arm link (100), there is no need to consider how to route the cable (102) and thus the difficulty of cable routing design can be significantly reduced. Furthermore, the efficiency of robot assembly and maintenance can be increased accordingly. In addition, the cables (102) arranged in the robot arm links (101) are not easily damaged, thereby increasing the service life of the robot.

Abstract: A method and an electronic device for calibrating a robot. The method includes obtaining at least two sets of positional data of a first reference point in a base coordinate system of the robot, the first reference point fixedly arranged on the external axis, the at least two sets of positional data corresponding to at least two positions of the first reference point during movement of the external axis. The method includes determining a transformation relationship between the base coordinate system and an user coordinate system of the external axis according to the at least two sets of positional data, determining the calibrated user coordinate system based on the base coordinate system and the transformation relationship, and controlling the robot to process an object arranged on the external axis under the calibrated user coordinate system.

Abstract: Structural members and methods for manufacturing a plastic-based, bulk, antimicrobial structural member of a robot. Such bulk antimicrobial plastic solution can meet the hygienic requirement and the mechanical performance requirement of a structural member of a robot simultaneously. Meanwhile, it may reduce the overall weight of the robot.

Abstract: The present invention relates to a process for moulding a polymeric object, the process comprising the steps of: (a) providing a substantially flat horizontally positioned layer of a material, the layer being a film or sheet; (b) providing a layer of a thermoplastic powder onto the layer provided under (a); (c) subjecting a pre-defined part of the thermoplastic powder to irradiation to heat the pre-defined part of the thermoplastic powder to a temperature at which the thermoplastic fuses or sinters onto at least a part of the flat layer of material; (d) terminating the exposure to irradiation; (e) providing a further layer of the thermoplastic powder onto the layer provided under (b); (f) subjecting a pre-defined part of the thermoplastic powder of the layer provided under (e) to irradiation to heat the pre-defined part of the thermoplastic powder to a temperature at which the thermoplastic fuses or sinters onto at least a part of the flat layer of the material fused under (c); (g) terminating the exposure to

Abstract: A plastic robot arm link for a robot includes a body made of plastic material, a connection arranged on the body and adapted to be coupled to a further plastic robot arm link or a transmission part of the robot, and an insertion made of material with a higher strength or stiffness than the plastic material and embedded in the body and/or the connection. By embedding the material with higher strength or stiffness within the body of the robot arm link made of plastic material, the stiffness and strength of the robot arm link can be enhanced. In addition, due to the presence of highly rigid materials, the creep effect of the plastic arm is also significantly reduced, improving the accuracy of the robot.

Abstract: A housing for a plastic gearbox and associated plastic gearbox and a robot. The housing includes a body including an inner engaging portion circumferentially arranged on an inner surface of the body, the inner engaging portion adapted to be engaged with a transmission assembly of the plastic gearbox; and an adjusting mechanism arranged around the body and operable to squeeze the body inwardly to reduce an inner diameter of the body. By using the adjusting mechanism to squeeze the body of the housing inwardly, the fit error between the inner engaging portion and the transmission assembly can be compensated in an efficient way. Furthermore, the adjusting mechanism is a part of the housing and thus the body of the housing which is made of plastic does not need to be too thick, which makes injection molding easier and manufacturing precision improved.