Abstract: The present disclosure relates to a method and a device of a 425 nm wavelength reference construction based on fluorescence-induced effect. The method comprises: a continuously tunable laser, an atomic furnace, a chromium atomic beam, an optical frequency comb, a frequency doubling optical path, a bias-preserving fiber beam splitter, a bias-preserving fiber beam combiner, a beat-frequency detection optical path, an optoelectronic receiver, and a frequency counter atomic furnace.

Abstract: The present disclosure relates to a method and a device of a 425 nm wavelength reference construction based on fluorescence-induced effect. The method comprises: a continuously tunable laser, an atomic furnace, a chromium atomic beam, an optical frequency comb, a frequency doubling optical path, a bias-preserving fiber beam splitter, a bias-preserving fiber beam combiner, a beat-frequency detection optical path, an optoelectronic receiver, and a frequency counter atomic furnace.

Abstract: Methods, systems, and apparatus for making and using a lens antenna fed by a phased array. In some implementations, a communication device includes an antenna system includes a lens antenna and a feed antenna. The lens antenna can be a gradient index lens having a substantially ellipsoidal shape, and having a plurality of layers that respectively have different dielectric constants. The feed antenna can include an array of antenna elements and can be spaced apart from the lens antenna. The communication device can include one or more processors configured to control excitation patterns for the antenna elements of the feed antenna to form beams directed at any of a range of spatial locations. The one or more processors can be configured to cause excitation patterns that concurrently excite multiple antenna elements of the feed antenna with different magnitudes and phase characteristics.

Abstract: Various arrangements of transmit and receive shared-aperture array antenna systems are presented herein. The arrangements can include an antenna that includes: a planar substrate; a first row of a first plurality of transmit patches arranged on the planar substrate; a second row of a plurality of receive patches arranged on the planar substrate; and a third row of a second plurality of transmit patches arranged on the planar substrate.

Abstract: Various arrangements of transmit and receive shared-aperture array antenna systems are presented herein. The arrangements can include an antenna that includes: a planar substrate; a first row of a first plurality of transmit patches arranged on the planar substrate; a second row of a plurality of receive patches arranged on the planar substrate; and a third row of a second plurality of transmit patches arranged on the planar substrate. The first row, second row, and third row can be parallel and the second row can be between the first row and the third row.

Abstract: A method of processing a text, an electronic device, and a storage medium, which relates to a field of an image processing technology, in particular to a field of computer vision technology. The method includes: determining similarities between a plurality of fields contained in a text image to be processed and a plurality of predetermined field names; determining, from the plurality of fields, a field having a similarity greater than a similarity threshold as a target field name; determining a target field value corresponding to the target field name from M remaining field among the plurality of fields other than the target field name, where M?1; and outputting a correspondence between the target field name and the target field value.

Abstract: An integral waveguide device herein includes a polarizer component comprising a waveguide and a dielectric slab, the dielectric slab configured to change a polarization of a signal passing through the waveguide. The integral waveguide device also includes a feed horn for conveying signals between the waveguide and a parabolic antenna. The waveguide of the polarizer and the feed horn are manufactured as an integral component with the feed horn disposed at a first end of the waveguide.

Abstract: Various arrangements of transmit and receive shared-aperture array antenna systems are presented herein. The arrangements can include an antenna that includes: a planar substrate; a first row of a first plurality of transmit patches arranged on the planar substrate; a second row of a plurality of receive patches arranged on the planar substrate; and a third row of a second plurality of transmit patches arranged on the planar substrate. The first row, second row, and third row can be parallel and the second row can be between the first row and the third row.

Abstract: An integral waveguide device herein includes a polarizer component comprising a waveguide and a dielectric slab, the dielectric slab configured to change a polarization of a signal passing through the waveguide. The integral waveguide device also includes a feed horn for conveying signals between the waveguide and a parabolic antenna. The waveguide of the polarizer and the feed horn are manufactured as an integral component with the feed horn disposed at a first end of the waveguide.