Abstract: The present disclosure provides a vertical compact flotation unit with air stripping enhanced shallow sedimentation effect of spiral fins, and relates to the technical field of complicated treatment of oily waste water such as oil field polymer flooding produced water so as to give consideration to bubble utilization rate, operation energy consumption, structure compactness and installation and maintenance cost. The equipment includes a tank, an oil receiving structure, a swirling inner cylinder, a swirl breaking structure, sedimentation separation components and a center cylinder. An exhaust port is formed in the top of the tank, a slag discharge port is formed in the bottom of the tank, the side surface of the tank is provided with an oil spill port, a water outlet pipe and a water inlet pipe, and the water inlet pipe is tangentially connected with the swirling inner cylinder.

Abstract: The present disclosure provides a concentric sloping plate enhanced vertical compact flotation unit, relates to the technical field of oily waste water treatment, and is mainly used for efficient treatment of oily waste water such as oilfield produced water, refining and chemical waste water and tanker ballast water. The compact flotation unit includes a tank, an oil receiving structure, a swirling inner cylinder, a swirl breaking structure, a flow equalizing structure, sloping plate sedimentation components and a center cylinder. An exhaust port is formed in the top of the tank, a slag discharge port is formed in the bottom of the tank, and the side surface of the tank is provided with an oil spill port, a water outlet pipe and a water inlet pipe.

Abstract: Provided is a high contrast grating polarizer with adjustable polarization characteristics, relating to the technical field of photoelectric devices. The high contrast grating polarizer includes a transparent substrate; and a plasma metal antenna structure layer, a refractive index electrically-tunable switching layer, a first electrode layer, and a second electrode layer located on the transparent substrate, where the plasma metal antenna structure layer includes a high contrast grating and a plasma metal antenna structure interleaved with the high contrast grating, the high contrast grating includes a semiconductor grating or a dielectric grating, the high contrast grating is used for transmitting light in a first polarization direction, the plasma metal antenna structure is used for reflecting light in a second polarization direction, and the first polarization direction is opposite to the second polarization direction.

Abstract: The present disclosure provides a vertical cavity surface emitting laser, relating to the technical field of photoelectric devices. The vertical cavity surface emitting laser includes a substrate layer, a buffer layer, a first reflector layer, a light emitting layer, a polarization selective hybrid layer and an electrode layer that are stacked. The polarization selective hybrid layer includes a second reflector layer and a near wavelength grating layer integrated above the second reflector layer, where a period of a near wavelength grating is smaller than a wavelength of light in a propagating medium and larger than a wavelength of light in a semiconductor material of the vertical cavity surface emitting laser. The vertical cavity surface emitting laser can emit highly stable and highly polarized laser light, and is simple in structure and convenient to fabricate. The second reflector layer is thinner, which reduces the production cost.

Abstract: Provided is a high contrast grating polarizer, which relates to the technical field of photoelectric devices. The polarizer includes a substrate, a high contrast grating on the substrate and a plasmonic metal antenna structure interleaved with the high contrast grating, where the high contrast grating includes a semiconductor grating or a dielectric grating; and the high contrast grating is configured to transmit light of a first polarization direction, the plasmonic metal antenna structure is configured to reflect light of a second polarization direction, and the first polarization direction is opposite to the second polarization direction.

Abstract: A method for controlling an artificial intelligence (AI) device can include obtaining, via a processor in the AI device, a knowledge base including a plurality of nodes, and flattening, via the processor, the knowledge base by transforming the knowledge base into a first plurality of documents to form a first index, each of the first plurality of documents identifying a node within the knowledge base. Also, the method can further include receiving, via the processor, a user query, retrieving, via the processor, a subset of documents based on the first plurality of documents and the user query, and performing, via the processor, a task related to knowledge base question answering (KBQA) based on the subset of documents.

Abstract: A method for controlling an artificial intelligence (AI) device can include obtaining, via a processor in the AI device, a knowledge base including a plurality of nodes, and flattening, via the processor, the knowledge base by transforming the knowledge base into a first plurality of documents, each of the first plurality of documents identifying a node within the knowledge base. Also, the method can further include receiving, via the processor, a user query, performing, via the processor, matching based on the user query and the first plurality of documents to generate a ranked results list, reducing, via the processor, the ranked results list based on a reducing operation to generate a reduced list, and outputting, via the processor, linked entities based on the reduced list.

Abstract: A programmable structured light generator, a photoelectric device having same, and a manufacturing method. The structured light generator includes: a laser module, wherein the laser module includes a programmable controller and an individually addressable vertical cavity surface emitting laser array (VCSEL), and the programmable controller is used for controlling light spot position coding of the VCSEL array; a collimation module, disposed at a light source emitter of the VCSEL array, wherein the collimation module is used for collimating emergent light of the VCSEL array; and a metasurface module, disposed on an emitted light focal plane path, wherein the metasurface module is used for projecting a programmable structured light speckle dot matrix pattern in a far field.