Abstract: A heat exchanger disclosed in the present disclosure includes a first collecting pipe, a second collecting pipe, a number of heat exchange tubes, at least one fin and a hygroscopic colloid. The heat exchange tube has a pipe wall and a refrigerant flow channel for a refrigerant to circulate. The heat exchange tube has a first end and a second end. The refrigerant flow channel extends from the first end to the second end along an extension direction of the heat exchange tube and extends through the heat exchange tube. The hygroscopic colloid is adhered to at least part of an outer surface of the heat exchange tube and/or the fin. The present disclosure also discloses a heat exchange system having the heat exchanger and a method for making the heat exchanger. The hygroscopic colloidal material of the present disclosure is friendly to metal surfaces.

Abstract: The present application provides a light-assisted sleep and wake-up alarm clock and a wake-up method thereof, and relates to the field of human biological sleep. The light sleep aid and wake-up alarm clock comprises an alarm clock and a sleep monitoring device, a light-emitting unit is arranged on the front of the alarm clock, a timer is arranged in the middle of the alarm clock, and a control module is arranged inside the alarm clock and a control mainboard is electrically connected with the light-emitting unit and the timer, a wireless receiving module is also arranged on the control mainboard, a wireless sending module is arranged inside the sleep monitoring device, and the wireless sending module is wirelessly connected with the wireless receiving module, and a sleep aid module and a sleep detection module are also arranged inside the sleep monitoring device.

Abstract: A mounting bracket includes a bracket body, a locking assembly and support foot. The bracket body is configured for component installation. The locking assembly is arranged on the bracket body, and the support foot is arranged on the bracket body. The support foot is slide along the up and down direction of the bracket body, and the locking assembly is configured to lock the support foot at a preset position. Through the above structure, the support foot is installed on the ground and used to support the bracket body, and the locking assembly locks the support foot at a preset position to correspondingly adjust the height of the bracket body from the ground, so as to adjust the suspension height of the components installed on the bracket body.

Abstract: A regulating device for regulating water consumption of a concealed water tank includes a water tank, a hinged base is fixedly arranged on the inner wall of the water tank, a water separator is hinged on the hinged base. A regulating mechanism is arranged between the hinged base and the water separator, and the regulating mechanism can drive the water separator to rotate and fix to divide the accommodation space of the water tank. Compared with the prior art, the regulating device realizes the variable volume of the water tank by regulating the rotation of the water separator through the regulating mechanism. The structure is simple and convenient for the later repair and maintenance of the water tank.

Abstract: An antenna structure includes a first signal connector and a second signal connector. The antenna structure further includes a cavity antenna defined by a set of planar walls. The cavity antenna is coupled to the first signal connector and configured to emit a field polarized linearly in a first direction when driven by a signal at the first signal connector. The antenna structure further includes a dipole antenna defined by a pair of arms that are integrated with a wall of the cavity antenna. The dipole antenna is coupled to the second signal connector and configured to a field polarized linearly in a second direction offset from the first direction when driven by a signal at the second signal connector.

Abstract: Disclosed a method for predicting permeability of a multi-mineral phase digital core based on deep learning. In the present disclosure, a three-dimensional digital core is constructed and a pore structure is randomly generated; after a plurality of multi-mineral digital core images is acquired by performing image segmentation on the three-dimensional digital core, permeability corresponding to each of the multi-mineral digital core images is acquired by simulation using multi-physics field simulation software and a multi-mineral digital core data set is constructed based on the plurality of multi-mineral digital core images and the permeability corresponding to each of the multi-mineral digital core images; an SE-ResNet18 convolutional neural network is constructed and trained with the multi-mineral digital core data set; and an image of a multi-mineral core to be predicted is input into the trained SE-ResNet18 convolutional neural network to determine the permeability of the multi-mineral core.

Abstract: An optical imaging lens includes a first lens element to a fourth lens element, and each lens element has an object-side surface and an image-side surface. The first lens element has negative refracting power, an optical axis region of the object-side surface of the first lens element is convex, the third lens element has negative refracting power, and an optical axis region of the image-side surface of the fourth lens element is convex. Lens elements included by the optical imaging lens are only the four lens elements described above, and the optical imaging lens satisfies the relationship of Tmax+Tmin?700.000 ?m, Tmax is a maximum thickness of the four lens elements from the first lens element to the fourth lens element along the optical axis, Tmin is a minimum thickness of the four lens elements from the first lens element to the fourth lens element along the optical axis.

Abstract: A warning device (100, 212, 301, 302, 510) for use in a luminaire (201, 410, 501), comprising a housing (110, 210, 310) accommodating a drive module (115, 215, 401, 402, 520) arranged to be coupled to a luminaire and to a mains voltage (260, 560). The drive module comprises a light source (120, 420) coupled to a switch (180, 380, 491, 492) and an electrical interface (140, 240) configured to electrically connect the drive module and the mains voltage to a light element (530) of the luminaire. The housing comprises a lid (130, 230, 330) operably coupled to the switch of the drive module and configured to activate the switch upon an opening of the lid for switching on the light source upon a current of the mains voltage passing in the electrical interface and deactivate the switch module upon a closing of the lid for switching off the light source.

Abstract: A conversion device includes a primary side circuit, a secondary side circuit, a transformer, and a control circuit. The primary side circuit includes a primary side switch and is configured to receive an input voltage. The secondary side circuit outputs an output voltage to a load. The transformer comprises a primary winding and a secondary winding, the primary winding is electrically coupled to the primary side circuit and the secondary winding electrically coupled to the secondary side circuit. The control circuit is configured to control a peak value of the current of the primary side switch, to be limited in a band range.

Abstract: Disclosed herein is a waterborne polyurethane-epoxy resin-based primer composition and its preparation method. Further disclosed herein is a primer layer obtained from curing the waterborne polyurethane-epoxy resin-based primer composition on substrates as well as a method of curing the primer composition on substrates.

Abstract: An Internet of Things device includes an anomaly monitoring switch such that the Internet of Things device performs anomaly monitoring when the anomaly monitoring switch is enabled. An anomaly rule is stored in the Internet of Things device. According to the anomaly rule, the Internet of Things device determines whether a request sent by the Internet of Things device is an anomaly request and whether a control instruction received from an Internet of Things cloud platform is an anomaly control instruction. When the anomaly request or anomaly control instruction is received, the Internet of Things device discards the anomaly request or the anomaly control instruction.

Abstract: A method for preventing data misdeletion includes: each of an Internet of Things (IoT) terminal and a user terminal is provided with a misdeletion prevention switch; and when a user opens the misdeletion prevention switch of the user terminal, the misdeletion prevention switch of the IoT terminal is synchronously opened, and when a server obtains a deletion request generated by the server, the server does not respond to the deletion request.

Abstract: The invention discloses a charging state analysis method of a electric vehicle based on electrical characteristic sequence analysis. The method includes following steps: step S1, obtaining voltage sampling data and current sampling data of the electric vehicle during charging; step S2, setting a time interval, so as to divide the voltage sample data and the current sampling data obtained in step S1 into multiple data sets; step S3, calculating an electrical characteristic vector of each time interval; step S4. adding the calculation results of Step S3 to a temperature sensing value T, and generate an electrical characteristic sequence of whole charging cycle; step S5, inputting the electrical characteristic sequence of the electric vehicle into a trained Time Recurrent Neural Network (TRNN) in sequence to obtain corresponding results; if the result is 1, it means normal; if the result is 0, it means abnormal.

Abstract: A rhizome-growth monitoring device of a clonal plate is provided, including a supporting frame. A first adjustment rack is fixed above a side of the supporting frame, a side end of which is movably connected to a second adjustment rack. A connection sleeve is movably connected to a bottom end of the second adjustment rack. A lifting cylinder is fixed in the connection sleeve. A camera group is fixed to the lifting cylinder through a connection plate. A rhizome growth monitoring sleeve is fixed at a bottom end of the connection plate, and includes an outer sleeve, an inner sleeve, and a radar monitoring head. The outer sleeve is fixed onto the bottom end of the connection plate. The inner sleeve is screwed to an inner side of the outer sleeve. The radar monitoring head is installed in the inner sleeve and close to a bottom surface thereof.

Abstract: A rhizome-growth monitoring device of a clonal plate is provided, including a supporting frame. A first adjustment rack is fixed above a side of the supporting frame, a side end of which is movably connected to a second adjustment rack. A connection sleeve is movably connected to a bottom end of the second adjustment rack. A lifting cylinder is fixed in the connection sleeve. A camera group is fixed to the lifting cylinder through a connection plate. A rhizome growth monitoring sleeve is fixed at a bottom end of the connection plate, and includes an outer sleeve, an inner sleeve, and a radar monitoring head. The outer sleeve is fixed onto the bottom end of the connection plate. The inner sleeve is screwed to an inner side of the outer sleeve. The radar monitoring head is installed in the inner sleeve and close to a bottom surface thereof.

Abstract: This application is applicable to the field of communications technologies, and provides a method and a device for preventing data misdeletion, a storage medium, and a program product. The method includes: Each of an IoT terminal and a user terminal is provided with a misdeletion prevention switch; and when a user opens the misdeletion prevention switch of the user terminal, the misdeletion prevention switch of the IoT terminal is synchronously opened, and when a server obtains a deletion request generated by the server, the server does not respond to the deletion request. In this way, the misdeletion prevention switch of the IoT terminal is in an opened state, data of the IoT terminal stored in the server is not deleted, and data of the IoT terminal stored in the IoT terminal is also not deleted, so that related data of the IoT terminal can be prevented from being mistakenly deleted, to prevent the IoT terminal from being mistakenly deleted from an Internet of Things that the IoT terminal has accessed.

Abstract: A single feed antenna design is conducted on a radiator of a specific shape (for example, a strip radiator or a slot radiator) to excite a plurality of antenna modes. For example, performing a feed design on a strip radiator may excite a CM wire antenna mode and a DM wire antenna mode. For another example, performing a feed design on a slot radiator may feed a CM slot antenna mode and a DM slot antenna mode. The antenna design may be used to cover a plurality of frequency bands when an antenna is miniaturized.

Abstract: A non-intrusive load identification method based on the Power Fingerprint characteristics of the load is provided. The method includes: S1, collecting Power Fingerprint characteristic data of several loads of the same type; S2, after preprocessing Power Fingerprint characteristic data of load, establishing convolution neural network based on attention mechanism to learn load characteristics; S3, using sliding time window algorithm to realize load switching event detection, In order to extract the change of electrical data of user bus before and after the switching event, the non-intrusive load identification problem is converted into the single load identification problem; S4, the load identification is realized, and the extracted electrical information features of single load are identified using the trained model.

Abstract: The present invention relates to a method for enhancing fragrance or perfume longevity of a composition by adding to the composition (a) a quaternary ammonium compound; (b) a cationic polysaccharide; (c) a nonionic polysaccharide; and (d) a fragrance material or perfume. In particular, the quaternary ammonium compound is a biodegradable quaternary ammonium compound. The composition has improved perfume longevity.