Abstract: A large-angle sloping roof steel structure connected to a main body structure, including: an intermediate platform, inclined main supporting steel columns circumferentially connected at four corners of the intermediate platform, constructing steel columns and wind-proof surrounding beam connected between top ends of the inclined main supporting steel columns, where roof purlin are connected between the adjacent inclined main supporting steel columns at intervals. The invention provides a top-down inverted construction method for a large-angle sloping roof with a steel structure as the main structural form. By using the method, the operation safety of an inclined main stressed vertical member during the installation process can be ensured, and the investment of supporting measures is reduced by preferentially installing the intermediate platform, thus effectively ensuring the installation progress, quality and safety of the sloping roof steel structure.

Abstract: The present disclosure provides an agricultural plant protection machine. The machine includes a frame, a liquid storage tank for storing liquid, a pipeline connected to the liquid storage tank, a nozzle, and a pump for pumping the liquid in the liquid storage tank to the nozzle. The pump includes a pump body including a liquid inlet, a liquid outlet, and a pressure relief port; a pressure relief device disposed at the pressure relief port, the pressure relief device including a valve and an elastic reset member, the valve being disposed corresponding to the pressure relief port for sealing the valve. In response to a hydraulic pressure in the pump body exceeding a preset pressure threshold, the valve is separated from the pressure relief port under the force of the liquid and the liquid flows out of the pressure relief port.

Abstract: A diaphragm pump includes a pump body mechanism, a one-way valve mechanism, a diaphragm mechanism, and an eccentric mechanism, wherein the one-way valve mechanism, the diaphragm mechanism and the eccentric mechanism are mounted at the pump body mechanism. The one-way valve mechanism includes a valve cover and a one-way valve mounted at the pump body mechanism via the valve cover. The diaphragm mechanism includes a pump cover and a diaphragm connected to the pump cover. The pump cover is mounted at the pump body mechanism and covers the diaphragm and the valve cover. The diaphragm is detachably connected to the eccentric mechanism. The pump cover and the diaphragm jointly form a diaphragm cavity, and an inner side of the pump cover is provided with a flow channel communicating with the diaphragm cavity and configured to allow liquid to flow into or out of the diaphragm cavity through the flow channel.

Abstract: A diaphragm pump includes a pump body mechanism, a diaphragm mechanism, a motor mechanism, and an eccentric mechanism. The diaphragm mechanism includes a diaphragm. The eccentric mechanism including a bracket assembly and an auxiliary member. The motor mechanism includes a motor. The bracket assembly includes a bracket connected to the diaphragm and a driving member mounted at a motor shaft of the motor. The auxiliary member is mounted at the bracket, arranged corresponding to the driving member, and configured to contact the driving member. The diaphragm mechanism, the motor mechanism, and the eccentric mechanism are mounted at the pump body mechanism. The motor shaft is configured to drive the driving member to reciprocally abut against the auxiliary member to cause the bracket to move together with the auxiliary member to drive the diaphragm to reciprocate.

Abstract: The present disclosure relates to a valve body assembly. The valve body assembly may include a valve body and a valve base. The valve body may include a housing, a valve core, and a first fluid channel. The valve base may include a driving portion and a second fluid channel. A bottom of the housing may include an opening. The valve core may be configured to move relative to the housing to seal the opening in a separated state or open the opening in a docked state.

Abstract: The specification describes methods and systems for processing information. An exemplary method includes reading, by a computing device through a near field communication (NFC) interface, an electronic tag to obtain product information stored in the electronic tag; storing, by the computing device, the product information in the computing device; generating, by the computing device, an order based on the stored product information; receiving, by the computing device, a settlement file after the order is paid, wherein the settlement file comprises a user identification (ID) and a user credit score corresponding to the user ID; and transmitting, by the computing device, the settlement file to a server for verification based on the user credit score.

Abstract: An agricultural unmanned aerial vehicle (UAV) includes a fuselage, a flight power apparatus, a plurality of spray nozzles, a plurality of water pumps, and a controller. The flight power apparatus is mounted at the fuselage. The plurality of spray nozzles are installed below the flight power apparatus. The plurality of water pumps are connected to the plurality of spray nozzles and configured to deliver liquid to the spray nozzles. The controller is electrically coupled to the plurality of water pumps, and configured to selectively control one or more of the plurality of water pumps to pump the liquid to one or more of the spray nozzles connected to the one or more of the water pumps.

Abstract: The present specification discloses a smart broadcast device, including: a device body, wherein the device body comprises a first surface that comprises a payment graphic code; a transceiver, installed inside the device body and configured to communicate with a payment service provider through maintaining a persistent wireless and/or wired network connection with the payment service provider; a processor, installed inside the device body and electrically connected to the transceiver; and a speaker, installed inside the device body and electrically connected to the processor, wherein the processor submits a payment result audio signal to the speaker upon receiving an external trigger signal from the payment service provider by using the transceiver, wherein the external trigger signal includes data defining at least a portion of a payment result, and wherein the payment result audio signal drives the speaker to output payment result audio.

Abstract: A service processing method includes: receiving RF signals sent by at least one terminal device, the RF signals including at least one device identifier of the at least one terminal device; selecting an RF signal from the received RF signals, and determining a terminal device corresponding to a device identifier included in the RF signal as a target payment device; collecting first biometric feature information of a user using the terminal device; and after obtaining a verification result of a verification on the user's identity based on the first biometric feature information, sending a payment request to a server if the verification is passed, wherein the payment request is configured to request for completing payment based on a payment account corresponding to the target payment device.

Abstract: Implementations of the present specification provide an interaction behavior detection method, apparatus, system, and device. The method includes the following: obtaining a to-be-detected depth image photographed by a depth photographing device, extracting a foreground image used to represent a moving object from the to-be-detected depth image, obtaining spatial coordinate information of the moving object based on the foreground image, comparing the spatial coordinate information of the moving object with spatial coordinate information of a shelf in a rack, and determining an article touched by the moving object based on a comparison result and one or more articles on the shelf.

Abstract: The present specification discloses a smart broadcast device, including: a device body, wherein the device body comprises a first surface that comprises a payment graphic code; a transceiver, installed inside the device body and configured to communicate with a payment service provider through maintaining a persistent wireless and/or wired network connection with the payment service provider; a processor, installed inside the device body and electrically connected to the transceiver; and a speaker, installed inside the device body and electrically connected to the processor, wherein the processor submits a payment result audio signal to the speaker upon receiving an external trigger signal from the payment service provider by using the transceiver, wherein the external trigger signal includes data defining at least a portion of a payment result, and wherein the payment result audio signal drives the speaker to output payment result audio.

Abstract: The present disclosure provides a method and device for in-vehicle payment. A face image of an in-vehicle user and a geographic location of the in-vehicle user are received at a point of a ride route traveled by a vehicle occupied by the in-vehicle user. An image set associated with the geographic location is received from an image database using the geographic location of the in-vehicle user. The image set includes face images of a plurality of users. The face image of the in-vehicle user is compared with face images in the image set to determine an identity of the in-vehicle user. A fare deduction account corresponding to the in-vehicle user is identified using the identity of the in-vehicle user. A fare corresponding to the ride route is deducted from the fare deduction account.

Abstract: Association information received from a number of mobile devices is recorded at a server end, where each mobile device is associated with a user that is pre-registered with the server end. An identification request is received at the server end and from a cashier device, where the identification request includes identity information associated with a particular user. One or more payment candidates corresponding to the cashier device are determined by the server end. A particular user account corresponding to the particular user is determined by the server end by comparing the identity information from the identification request with identity information associated with each of the payment candidates. The particular user account is returned by the server end to the cashier device for making a payment.

Abstract: An agricultural plant protection machine and a diaphragm pump thereof are provided. The diaphragm pump includes a pump body including a containing cavity; a pump cover on the pump body; a diaphragm in the containing cavity, which and the pump cover surround to form a cavity; and a driving mechanism in the containing cavity. The driving mechanism includes a push rod, a coil assembly and an elastic reset member. The push rod is connected to the diaphragm and the elastic reset member. When the coil assembly is powered on and powered off alternately, the push rod makes a reciprocating linear motion to drive the diaphragm to reciprocate relative to the pump cover so as to reduce or enlarge the cavity.

Abstract: An agricultural unmanned aerial vehicle (UAV) is provided. The UAV includes a central frame, a control circuit, a left arm group, a right arm group and a spraying system. The left and right arm groups each includes a front arm assembly including a second rotor assembly, a rear arm assembly including a third rotor assembly, and a middle arm assembly including a first rotor assembly. In an output direction of downwash flow fields of the left and right arm groups, a height of a rotation plane of the first rotor assembly is lower than heights of rotation planes of the second and third rotor assemblies. The spraying system includes nozzle assemblies. The control circuit is configured to control the left and right arm groups to adjust flight attitude of the UAV. The left and right arm groups output the downwash flow fields in a direction towards the nozzle assemblies.

Abstract: A control unit of the article processing terminal controls a radio frequency identification (RFID) reader of the article processing terminal to periodically scan a plurality of short-range articles. In response to a status change of an article of the plurality of short-range articles, the control unit receives an article identifier of the article from the RFID reader. The control unit controls a low-power wide-area network (LPWAN) module of the article processing terminal to send an article change message to a LPWAN gateway, where the article change message includes the article identifier and an address of an application server, and where the LPWAN gateway instructs, based on the article change message and the address, the application server to perform a next processing step on the article identified by the article identifier.

Abstract: The present disclosure provides a method and device for in-vehicle payment. A face image of an in-vehicle user and a geographic location of the in-vehicle user are received at a point of a ride route traveled by a vehicle occupied by the in-vehicle user. An image set associated with the geographic location is received from an image database using the geographic location of the in-vehicle user. The image set includes face images of a plurality of users. The face image of the in-vehicle user is compared with face images in the image set to determine an identity of the in-vehicle user. A fare deduction account corresponding to the in-vehicle user is identified using the identity of the in-vehicle user. A fare corresponding to the ride route is deducted from the fare deduction account.