Abstract: Provided are a method and a system for treating a mature landfill leachate.

Abstract: A polymer three-dimensional (3D) printing methodology is disclosed for freeform fabrication of polymeric structures under ambient conditions without the use of printed support structures. The build material can be dissolved in a suitable solvent for 3D printing. The polymer solution can be printed in (e.g., continuously printed using a moving dispensing nozzle) a yield-stress support bath to form an intermediate article. The intermediate article may be liquid or only partially coagulated after being printed into the yield-stress support bath. The yield-stress support bath may be at least partially disposed within a container, and the container may be immersed in a post-treatment coagulation solution to remove some or all of the solvent, causing the build material to fully solidify to form a finished article from the intermediate article.

Abstract: A fastening device can fix a first plate on a second plate, the first plate is defined a positioning hole. The fastening device includes a fixing member, a pressing member, a guiding member, and an elastic member. The guiding member is partially disposed in a receiving cavity of the fixing member and protruding from the fixing member to connect to the pressing member. The guiding member can extend through the positioning hole to cause the second plate to be disposed between the fixing member and the pressing member. The elastic member is disposed in the receiving cavity and resisting against the receiving cavity and the guiding member. The elastic member can drive the guiding member and the pressing member toward the first plate when the second plate moves between the pressing member and the fixing member. The present disclosure further provides a fixing assembly including the fastening device.

Abstract: The present application provides a power supply system for supplying power to network device, comprising power supply module, housing, and stereoscopic accommodating space therebetween. The power supply module without a fan comprises: a primary circuit comprising at least one primary switch and configured to receive AC input voltage and convert the AC input voltage into a first voltage; a transformer comprising primary and secondary windings and configured to convert the first voltage into a second voltage, the primary winding is coupled to the primary circuit; and a secondary circuit comprising at least one secondary switch and configured to convert the second voltage into a DC output voltage for the network device, the secondary circuit is coupled to the secondary winding, the secondary switch adopts SMT package, and power density of the power supply module is 60 W/inch3 or more. The stereoscopic accommodating space is filled with liquid coolant for cooling.

Abstract: Disclosed are a cleaning system and method for a solar cell. The cleaning system includes a cleaning device including a soaking tank configured to accommodate cleaner; and a filtering device configured to filter a first substance being a mixture of the cleaner and mask residue in the soaking tank. The filtering device including: a sucking apparatus including an sucking port for sucking the first substance; a spraying apparatus, including a spraying port oriented a region that the sucking port is capable of sucking in a bottom of the soaking tank, and the spraying port being configured to spry liquid or gas to flush the bottom of the soaking tank; and a filtering apparatus, connected to the sucking apparatus to receive and filter the first substance sucked by the sucking port.

Abstract: A Bluetooth Low Energy (BLE) mesh-based provisioning control method and system, and an electronic device. The method includes: the provisioner completes, within one interval scheduling cycle based on a preset ratio of effective transmission time to interval, interactive transmission of at least three data packets sent by the server; during provisioning between the provisioner and the to-be-connected device, the provisioner obtains current wireless access point information; the provisioner determines a target hopping channel value based on the current wireless access point information; after the to-be-connected device receives a connection request sent by the provisioner and sets the target hopping channel value as a to-be-connected device hopping value, the provisioner controls the to-be-connected device to hop at a frequency corresponding to the to-be-connected device hopping value to complete interaction of provisioning data packets.

Abstract: The present disclosure provides a connecting assembly and a power supply unit, which relates to the technical field of battery. The connecting assembly comprises: a first connecting member; a second connecting member; a screw; and a plurality of supporting members, each of which has a first end and a second end. The first end of each supporting member is fixed to the first connecting member, and the second end of each supporting member is provided with an engagement groove and a threaded hole. Each of some supporting members is connected to the second connecting member through the engagement groove, each of the other supporting members is connected to the second connecting member through fit between the threaded hole and the screw. This reduces the number of the screw to be used, saving the cost, and reducing the operation time.

Abstract: Disclosed in the present application is a buckling device and a chassis. The buckling device includes a first main body, a snap member, and a sliding member. The first main body is configured to be fixed within a box. The snap member is configured to be connected to a functional component. The sliding member is slidably connected to the first main body. The snap member is rotationally connected to the first main body and held against the sliding member, and the snap member is configured to drive the sliding member to slide during rotation, and the snap member is buckled and connected to the first main body when the sliding member is located at a first preset position protruding outside the box. When an area near a functional component needs to be avoided, rotate the snap member and drive the functional component to rotate to expose the avoidance space.

Abstract: An operation control method suitable for a fire extinguishing system of an extra-high voltage converter station is provided. The method includes: after an upper computer control system receives a sound-light alarm signal, an alarm position signal, and a switch position dividing signal, starting a spray range prediction analysis subsystem for a fixed fire monitor; determining, by the spray range prediction analysis subsystem for the fixed fire monitor based on an external wind direction and an external wind speed, whether a range of a fire monitor effectively covers an entire area of a converter transformer; and if yes, automatically presetting a first fire monitor to which a first compressed air foam generation subsystem belongs and a second fire monitor to which a second compressed air foam generation subsystem belongs; or if no, replacing a fire monitor with a mobile fire-fighting robot to extinguish a fire.

Abstract: A cleaning system and method can include a cleaning device including a soaking tank configured to accommodate cleaner; and a filtering device configured to filter a first substance being a mixture of the cleaner and mask residue in the soaking tank. The filtering device includes a sucking apparatus including an sucking port for sucking the first substance; a spraying apparatus, including a spraying port oriented a region that the sucking port is capable of sucking in a bottom of the soaking tank, the spraying port being configured to spray liquid or gas to flush the bottom of the soaking tank; and a filtering apparatus connected to the sucking apparatus to receive and filter the first substance sucked by the sucking port.

Abstract: A device is provided, which includes one or more antennas and a circuit. The circuit is configured to receive a packet from a transmitter device through the antennas, and obtain channel-state information from the received packet. The circuit includes one or more filters to filter out or recognize the received packet that complies with one or more preset conditions. The circuit uses the channel-state information of the received packet, which complies with the one or more preset conditions, to estimate a status of a channel between the transmitter device and the device.

Abstract: A wireless signal extending method is disclosed. A link between an electronic device and a first network node access point (AP) is generated. The electronic device connects to the first network node AP according to backhaul information. It is determined whether a location where the quality of connection signals with the first network node AP meets a preset value is discovered. If a first location where the quality of connection signals with the first network node AP meets the preset value is discovered, a second network node AP is placed at the first location. The second network node AP is enabled to enter in a pairing mode. A push button configuration (PBC) function of the first network node AP is remotely triggered to automatically pair the first network node AP and the second network node AP.

Abstract: Disclosed in the present disclosure is a locking bracket and a chassis. The locking bracket includes a locking base and a locking block. The locking base is fixedly connected to the chassis, and the locking block is movably connected to the locking base along a preset path to switch the locking block to the locked state when installing the functional module into the chassis. The clamping groove can clamp the limiting portion of the installing bracket that covers and fixes the functional module to fix its position, thereby improving the problem of component detachment caused by vibration, shaking, or impact during transportation of the chassis. When it is necessary to remove the functional module from the chassis, the locking block is moved along the preset path to switch from the locked state to the unlocked state.

Abstract: A wireless signal extending method is disclosed. A link between an electronic device and a first network node access point (AP) is generated. The electronic device connects to the first network node AP according to backhaul information. It is determined whether a location where the quality of connection signals with the first network node AP meets a preset value is discovered. If a first location where the quality of connection signals with the first network node AP meets the preset value is discovered, a second network node AP is placed at the first location. The second network node AP is enabled to enter in a pairing mode. A push button configuration (PBC) function of the first network node AP is remotely triggered to automatically pair the first network node AP and the second network node AP.

Abstract: An operation control method suitable for a fire extinguishing system of an extra-high voltage converter station is provided. The method includes: after an upper computer control system receives a sound-light alarm signal, an alarm position signal, and a switch position dividing signal, starting a spray range prediction analysis subsystem for a fixed fire monitor; determining, by the spray range prediction analysis subsystem for the fixed fire monitor based on an external wind direction and an external wind speed, whether a range of a fire monitor effectively covers an entire area of a converter transformer; and if yes, automatically presetting a first fire monitor to which a first compressed air foam generation subsystem belongs and a second fire monitor to which a second compressed air foam generation subsystem belongs; or if no, replacing a fire monitor with a mobile fire-fighting robot to extinguish a fire.

Abstract: The application provides a floating structure for mooring a vessel in a water body, comprising a hull having a plurality of dampers disposed on lateral sides or corners of the hull, a plurality of piles erected in the water body around a periphery of the hull, wherein each of the piles comprises a guiding plate having one or more guiding surfaces for coupling to at least one damper, one or more auxiliary piles connected to the pile by truss structure and partially embedded in the water body, the hull is vertically slidably coupled to a plurality of piles by slidably coupling the dampers to corresponding guiding surfaces of the guiding plate on the piles. The application also provides a plurality of floating structures linked to form a water-based hub serving as a novel nearshore logistics anchorage hub.

Abstract: Disclosed is a municipal sewage nitrogen removal treatment device, comprising a reaction pool. A water inlet pipeline, a water outlet pipeline and a reflux pipeline are connected to the reaction pool, and the reflux pipeline communicates with the water inlet pipeline by using a reflux element. A surface aerator is arranged in the reaction pool. The reaction pool comprises a reaction zone and a settling zone, the settling zone is located at the bottom of the reaction zone, and the reaction zone is provided with a flow deflector. The flow deflector is provided with a plurality of flow deflecting channels, the sidewall of the flow deflecting channel is a rough surface, and microorganisms in the reaction pool are able to attach to the sidewall of the flow deflecting channel. The present disclosure further provides a treatment method using the municipal sewage nitrogen removal treatment device above.

Abstract: A device is provided, which includes one or more antennas and a circuit. The circuit is configured to receive a packet from a transmitter device through the antennas, and obtain channel-state information from the received packet. The circuit includes one or more filters to filter out or recognize the received packet that complies with one or more preset conditions. The circuit uses the channel-state information of the received packet, which complies with the one or more preset conditions, to estimate a status of a channel between the transmitter device and the device.

Abstract: A cleaning system and method can include a cleaning device including a soaking tank configured to accommodate cleaner; and a filtering device configured to filter a first substance being a mixture of the cleaner and mask residue in the soaking tank. The filtering device includes a sucking apparatus including an sucking port for sucking the first substance; a spraying apparatus, including a spraying port oriented a region that the sucking port is capable of sucking in a bottom of the soaking tank, the spraying port being configured to spray liquid or gas to flush the bottom of the soaking tank; and a filtering apparatus connected to the sucking apparatus to receive and filter the first substance sucked by the sucking port.