Abstract: The disclosure discloses a door opening and closing device and an electrical apparatus, and belongs to the field of electrical apparatus. The door opening and closing device includes: a door ejection mechanism and a door rotation mechanism which are driven by a same drive mechanism. The drive mechanism includes: a driver, a first transmission assembly, a second transmission assembly connected to the driver and simultaneously separably connected to the first transmission assembly, and a clutch-ejection-push assembly, including an ejection-push sleeve which is sleeved on the second transmission assembly and a push rod for pushing the ejection-push sleeve, and the ejection-push sleeve is ejected and pushed by the push rod to push the second transmission assembly to separate from or connect to the first transmission assembly; and a linkage gear connected to the first transmission assembly and simultaneously connected to the door ejection mechanism and the door rotation mechanism.

Abstract: Computing systems of a multi-tenant trusted domain collect metadata describing data stored in data sources of a set of tenant trusted domains. The computing systems of the multi-tenant trusted domain use the metadata to process natural language questions based on data stored in data sources of a tenant trusted domain. The computing systems of the multi-tenant trusted domain identify a set of data sources of the tenant trusted domain that are relevant for processing the natural language question and generate an execution plan for answering the natural language question. The computing systems of the multi-tenant trusted domain send the execution plan to one or more computing systems of the tenant trusted domain. The computing systems of the tenant trusted domain execute the execution plan and send the result of executing the execution plan to a client device that sent the natural language question.

Abstract: Disclosed is a silicon carbide copper-plated gold-tin-preset heat sink structure, including a silicon carbide substrate, a first copper plate, a second copper plate and a preset gold-tin layer, wherein the first copper plate is provided on a side of the silicon carbide substrate, the second copper plate is provided on an other side of the silicon carbide substrate, a thickness of the silicon carbide substrate is larger than thicknesses of the first copper plate and the second copper plate, a width of the silicon carbide substrate is larger than widths of the first copper plate and the second copper plate, the thickness of the first copper plate is the same as the thickness of the second copper plate, the width of the first copper plate is smaller than the width of the second copper plate, and the preset gold-tin layer is provided outside the second copper plate.

Abstract: The disclosure discloses a door opening and closing device and an electrical apparatus, and belongs to a field of electrical apparatus. The door opening and closing device includes a door ejection mechanism and a door rotation mechanism driven by a same drive mechanism; the door rotation mechanism includes a drive member and a door rotation member; a first end of the door rotation member is rotatably disposed on a door body; a second end of the door rotation member is rotatably connected to a first end of the drive member; a second end of the drive member is rotatably disposed on a base; the drive mechanism includes a linkage gear; the linkage gear can drive the drive member to rotate to drive the door rotation member to rotate the door body, and drive the door ejection mechanism to eject and push the door body.

Abstract: A monolithic gas chromatograph is presented. The monolithic gas chromatograph includes a separation column and a gas detector. The separation column has an inlet to receive a gas sample therein. The separation column resides in a first layer of an integrated chip. The gas detector has an ionization chamber and an ionization source. The ionization chamber has an inlet in fluid communication with an outlet of the separation column to receive a gas sample from the separation column. The ionization source is configured to ionize molecules of the gas sample residing in the ionization chamber. The gas detector resides in a second layer of the integrated chip. The monolithic gas chromatograph further includes a third layer disposed between the first layer and the second layer. The third layer is configured to electrically isolate the first layer from the second layer. The gas detector is fluidly coupled to the separation column.

Abstract: The present invention provides bromine-based additives for overcharge protection in aqueous zinc-ion batteries. These additives undergo oxidation before electrolyte decomposition during overcharging, effectively preventing overcharge. As a result, the batteries demonstrate significantly extended lifespans and maintain stable electrolyte environments. The overcharge protection is effective for more than 650 hours in Zn?MnO2 batteries and 500 hours in Zn?MnVO batteries.

Abstract: A communication device includes a plurality of dies, a composite substrate and at least one antenna. The composite substrate includes a PCB, a redistribution layer and a connecting layer. The connecting layer is configured to electrically connect the redistribution layer and the PCB. Each die is electrically connected to the redistribution layer. The distribution layer corresponding to each die is formed integrally. The PCB is disposed between the antenna and the redistribution layer. The antenna is electrically connected to the dies through the composite substrate. A manufacturing method of the composite substrate is also provided.

Abstract: An antenna device includes a transparent substrate and a plurality of antenna units disposed on the transparent substrate. The transparent substrate has a first surface and a second surface opposite to the first surface. A light-transmitting area is provided between adjacent antenna units. Each antenna unit includes an antenna electrode, a ground electrode, a redistribution structure, and a chip. The antenna electrode is disposed on the first surface of the transparent substrate. The ground electrode is disposed on the second surface of the transparent substrate. A width of the ground electrode in a first direction is greater than a width of the antenna electrode in a first direction. The redistribution structure is coupled to the antenna electrode. The ground electrode is located between the redistribution structure and the transparent substrate. The chip is bonded to the redistribution structure.

Abstract: A magnetic response fiber material and a preparation method and an application thereof are provided, which relates to the field of oil-water separation materials. The preparation method includes: mixing a fiber-forming polymer, a primary solvent, a secondary solvent and magnetic nanoparticles to form a uniform spinning solution, where the fiber-forming polymer includes at least one of polyethylene, polypropylene and polymethylpentene; spinning the spinning solution by a spinning process to obtain the magnetic response fiber material. The prepared magnetic response fiber material has the advantages of high oil absorption speed, high oil absorption capacity and high separation efficiency. Magnetic nanoparticles have a high load, which can not only be driven by magnetic force to absorb oil floating on water surface, but also be driven to an underwater oil pollution position to absorb oil, and can be applied to water purification in oil-polluted areas that cannot be reached by manual processing.

Abstract: Embodiments of the present disclosure provide a spraying apparatus including a spraying region, a spraying body, a first processing device, and a second processing device. The spraying region is provided with to-be-sprayed object therein. The spraying body is configured to spray the to-be-sprayed object within the spraying region. The first processing device is in communication with the spraying region. The first processing device is configured to receive waste generated during spraying and perform a primary processing on the waste. The second processing device is disposed downstream the first processing device and configured to perform a re-processing on the waste subjected to the primary processing. With the first processing device and the second processing device, the waste generated during the spraying can be processed twice, which effectively increases processing effectiveness and noticeably reduces pollution of the waste, meeting emission requirements.

Abstract: Computing systems of a multi-tenant trusted domain collect metadata describing data stored in data sources of a set of tenant trusted domains. The computing systems of the multi-tenant trusted domain use the metadata to process natural language questions based on data stored in data sources of a tenant trusted domain. The computing systems of the multi-tenant trusted domain identify a set of data sources of the tenant trusted domain that are relevant for processing the natural language question and generate an execution plan for answering the natural language question. The computing systems of the multi-tenant trusted domain send the execution plan to one or more computing systems of the tenant trusted domain. The computing systems of the tenant trusted domain execute the execution plan and send the result of executing the execution plan to a client device that sent the natural language question.

Abstract: A mode switch controller includes a memory having instructions stored therein; and a processor configured to execute the instructions stored in the memory to cause the mode switch controller to: instruct a hybrid mode controller to output a first mode control signal to cause a system to operate in a first mode; and instruct the hybrid mode controller, based on a detected parameter signal, a first control barrier function, and a second control barrier function, to output a second mode control signal to cause a system to operate in a second mode, wherein the first control barrier function is based on the system operating in the first mode and the system switching from operating in the first mode to operating in the second mode, and wherein the second control barrier function is based on the system operating in the second mode.

Abstract: An antenna is provided and includes a bottom plate for being connected with a mounting body and an antenna body on the bottom plate. The antenna body includes: a substrate fixedly connected to the bottom plate; a plane of the substrate intersects the bottom plate; a radiation element on the substrate; a feeding structure configured to transmit and/or receive radio frequency signals to/from the radiation element and including a signal electrode and a ground electrode on a surface of the substrate. The signal electrode is electrically connected to the radiation element. On a reference plane perpendicular to the bottom plate, an orthographic projection of the ground electrode is spaced apart from that of the radiation element, and is entirely located between the orthographic projection of the radiation element and the bottom plate. The antenna can prevent the ground electrode from reflecting the electromagnetic waves radiated by the radiation element.

Abstract: An antenna is provided, and belongs to the field of communication technology and includes a first dielectric substrate, a first conductive layer, a second dielectric substrate, a second conductive layer, a third dielectric substrate and a conductive third layer which are sequentially stacked. The first conductive layer includes at least one first and second feed lines; the second conductive layer is provided with at least one first and second openings; the third conductive layer includes at least one first radiation part. Orthographic projections of any two of a first opening, a first feed line, a first radiation part corresponding to each on the other first dielectric substrate overlap with other; each an orthographic projection of a first radiation part on the first dielectric substrate intersects with that of each of a corresponding first and second feed lines on the first dielectric substrate.

Abstract: An intelligent air-assisted spraying device for orchards includes a traction mechanism, a spaying system, a collecting system, and a processing-controlling system. The traction mechanism is provided with a spray tank. The spaying system includes a main body connected to the spray tank and multiple spraying tubes, first ends of the spraying tube are communicated with the main body, and second ends of the spraying tubes are capable of rotating. The collecting system is configured to collect a contour and a volume of the canopy, and branch and leaf density of a fruit tree. The processing-controlling system is configured to obtain multiple spraying areas, calculate an air outlet angle of each spraying tube, and control a rotation of the second end of each spraying tube according to the air outlet angle. The device can adjust the spraying direction of each spraying tube, and the quality of pesticide application can be improved.