Abstract: The invention discloses a bionic laminated thermal insulation material, which imitates a multi-thin laminated and thin-layer micro-pore structure of Sequoia sempervirens bark with fire resistance, corrosion resistance and excellent thermal insulation performance. A low thermal conductivity microporous powder is used as main raw material, while reinforcing agent, plasticizer and porosity agent are added to form microporous thin-layer units, and each thin-layer unit is bonded and laminated to make a laminated thermal insulation material. The thermal conductivity of the finished products is as low as 0.02˜0.05 W/m·k, with good thermal insulation and mechanical properties, which can be used in a temperature range below 1000° C., with better thermal insulation and energy-saving effect and toughness than ordinary thermal insulation materials, significantly reducing the thickness of the insulation layer, and can be widely used in industrial furnaces, thermal engineering devices, insulation pipes and other fields.

Abstract: The present invention belongs to the technical field of CMOS image sensors, and particularly relates to an on-chip multiplexing pixel control circuit for controlling a super-large area array splicing CMOS image sensor. The multiplexing type pixel control circuit includes at least one multiplexing unit, each multiplexing unit includes L levels of serial pixel control sub-circuits and a windowing address gating circuit. Through the different positions of the multiplexing units in the whole chip, the group address buffer circuits of the multiplexing units generate different group address reference signals, which are compared with a group decoding address generated in a group decoding address buffer circuit to realize group decoding and gate the multiplexing unit. Meanwhile, the serial pixel control sub-circuit in the multiplexing unit is compared with a row decoding address to realize exposure and readout control of a corresponding row of the multiplexing unit.

Abstract: The present invention belongs to the technical field of CMOS image sensors, and particularly relates to an on-chip multiplexing pixel control circuit for controlling a super-large area array splicing CMOS image sensor. The multiplexing type pixel control circuit includes at least one multiplexing unit, each multiplexing unit includes L levels of serial pixel control sub-circuits and a windowing address gating circuit. Through the different positions of the multiplexing units in the whole chip, the group address buffer circuits of the multiplexing units generate different group address reference signals, which are compared with a group decoding address generated in a group decoding address buffer circuit to realize group decoding and gate the multiplexing unit. Meanwhile, the serial pixel control sub-circuit in the multiplexing unit is compared with a row decoding address to realize exposure and readout control of a corresponding row of the multiplexing unit.

Abstract: Methods, apparatus, systems, and articles of manufacture to process a machine learning model in a web-browser environment are disclosed. An example apparatus includes a graph builder to accumulate machine learning operations as a graph. A tensor manager is to, in response to a request to access a tensor that is not yet available and associated with the machine learning operations, identify the graph based on the tensor. A graph cache manager is to determine whether a condensed graph corresponding to the identified graph is available. A graph condenser is to, in response to the graph cache manager determining that the condensed graph is not available, generate the condensed graph. A graph executor is to execute the condensed graph to create the tensor. The tensor manager is to provide the tensor as a response to the request to access the tensor.

Abstract: The present disclosure relates to the technical field of artificial cores, in particular to a preparation method of artificial sandstone and/or conglomerate core based on lithology and pore structure control. The method comprises the following steps: mixing and molding sand particles and a inorganic cementing agent in sequence, and further adding a curing agent for performing solidification to prepare an artificial sandstone and/or conglomerate core; wherein composition of the sand particles is determined according to lithology and pore structure of the artificial sandstone and/or conglomerate core. The present disclosure combines the lithology and the pore structure of the artificial sandstone and/or conglomerate core with the composition of the sand particles, particularly regulates and controls the composition of the sand particles according to the pore throat distribution pattern and the average pore throat radius, thereby performing precise control on the artificial sandstone and/or conglomerate core.

Abstract: A vehicle speed calculation system includes a radar mounted at a vehicle and including an antenna used to receive an echo signal, a memory storing a program code, and a processor configured to execute the program code to obtain the echo signal and generate detection data according to the echo signal, determine, according to the detection data, a stationary object around the vehicle and stationary relative to a ground, determine a relative moving speed of the stationary object relative to the vehicle, and determine a vehicle speed of the vehicle according to the relative moving speed of the stationary object.

Abstract: The present disclosure relates to the technical field of artificial cores, in particular to a preparation method of artificial sandstone and/or conglomerate core based on lithology and permeability control. The method comprises the following steps: mixing and molding sand particles and a cementing agent in sequence, and further adding a curing agent for performing solidification to prepare the artificial sandstone and/or conglomerate core; wherein composition of the sand particles is determined according to properties of the artificial sandstone and/or conglomerate core comprising lithology and permeability. The present disclosure combines the properties of the artificial sandstone and/or conglomerate core with the proportion of the sand particles, particularly regulates and controls the composition of the sand particles according to the lithology and permeability of the artificial sandstone and/or conglomerate core, thereby performing precise control on the artificial sandstone and/or conglomerate core.

Abstract: A target detection method, a system, and a computer-readable storage medium are provided. The method includes: obtaining a scattering point set by using a radar sensor, where the scattering point set includes a plurality of scattering points; grouping the plurality of scattering points into at least one area based on characteristic information of the scattering points; and for a scattering point in each area, performing target detection on the scattering point in the area based on a detection parameter corresponding to the area, where detection parameters are individually set for different areas separately. The present disclosure can be used to effectively distinguish between a stationary object and a moving object, improve accuracy of target detection, and improve efficiency of target detection.

Abstract: The present disclosure describes semiconductor external cavity laser with wide bandwidth frequency modulation capabilities. The laser is preferably packaged in a standard form-factor package, such as a 14-pin butterfly package. The front end of the cavity comprises an integrated planar circuit (e.g., silica-on-silicon planar lightwave circuit with Bragg gratings), and the “back facet” of the laser is implemented as a high-reflection (HR) coated LiNbO3 phase tuning section in the double pass configuration. AC-voltage signal applied to the electrodes of phase tuning section modulates a refractive index of the propagating TE-polarization mode of external cavity and produces frequency modulation. Such frequency modulation is not associated with any thermal behavior of the gain element included in the external cavity laser, and has a negligible phase delay over a wide bandwidth.

Abstract: The present disclosure describes semiconductor external cavity laser with wide bandwidth frequency modulation capabilities. The laser is preferably packaged in a standard form-factor package, such as a 14-pin butterfly package. The front end of the cavity comprises an integrated planar circuit (e.g., silica-on-silicon planar lightwave circuit with Bragg gratings), and the “back facet” of the laser is implemented as a high-reflection (HR) coated LiNbO3 phase tuning section in the double pass configuration. AC-voltage signal applied to the electrodes of phase tuning section modulates a refractive index of the propagating TE-polarization mode of external cavity and produces frequency modulation. Such frequency modulation is not associated with any thermal behavior of the gain element included in the external cavity laser, and has a negligible phase delay over a wide bandwidth.

Abstract: Optical multiplexers and demultiplexers are provided. In one implementation an apparatus is provided. The apparatus includes a first laser diode pair, a second laser diode pair, a polarization rotator coupled between the first and the second laser diode pairs, and an output port. The first and second laser diode pairs include a first laser diode, a polarization beam splitter, a first quarter waveplate, a filter; a second quarter waveplate, and a second laser diode. The first and second laser diode pairs are coupled to the polarization rotator at the polarization beam splitter of each laser diode pair. In one implementation the apparatus is operable to multiplex distinct light signals emitted from the first and second laser diodes. In another implementation, an apparatus is provided that is operable to demultiplex an input light beam having a plurality of distinct channels.

Abstract: A low cost compact integrated 4-port single-channel OADM with improved optical isolation and low insertion loss is provided in which a 4-fiber pigtail includes I/O fibers and add/drop fibers, which are arranged on the same side of the multiplexer. A lens, filter and reflector are arranged in a double-pass configuration to route the optical signals to and from the appropriate fibers. The fibers are suitably arranged with the input and drop fibers at the corners of one diagonal and the output and add fibers at the corners of the crossing diagonal with the midpoints of the diagonals intersecting. Furthermore, a point halfway between the input and output fibers suitably lies at or near the central axis of the collimating lens.

Abstract: Optical multiplexers and demultiplexers are provided. In one implementation an apparatus is provided. The apparatus includes a first laser diode pair, a second laser diode pair, a polarization rotator coupled between the first and the second laser diode pairs, and an output port. The first and second laser diode pairs include a first laser diode, a polarization beam splitter, a first quarter waveplate, a filter; a second quarter waveplate, and a second laser diode. The first and second laser diode pairs are coupled to the polarization rotator at the polarization beam splitter of each laser diode pair. In one implementation the apparatus is operable to multiplex distinct light signals emitted from the first and second laser diodes. In another implementation, an apparatus is provided that is operable to demultiplex an input light beam having a plurality of distinct channels.

Abstract: A method and system for providing a highly integrated hybrid component is disclosed. The method and system include providing a triple fiber collimator, a dual isolator/polarization beam deflector and a dual fiber collimator. The triple fiber collimator receives a plurality of pump signals in a first direction and outputs an optical signal in a second direction. The dual isolator/polarization beam deflector is optically coupled to the triple fiber collimator. The dual isolator/polarization beam deflector transmits the pump signals in the first direction, prevents a portion of the pump signals from traveling out of the triple-fiber collimator in the second direction, provides the optical signal in the second direction and prevents a portion of the optical signal from traveling out of the dual fiber collimator in the first direction. The dual fiber collimator receives the optical signal traveling in the second direction and outputs the pump signals traveling in the first direction.

Abstract: A method and system for providing an optical circulator is disclosed. The optical circulator includes a first port, a second port and a third port adjacent to the first port. The optical circulator also includes a first birefringent material, a first rotator pair, a polarization beam deflector, a second birefringent material, a second rotator pair and a third birefringent material. The first birefringent material is optically coupled to the first port and the third port and has a longitudinal axis, a transverse direction perpendicular to the longitudinal axis, and a first displacement direction. The polarization beam deflector changes the direction of the optical signal without introducing a walk-off in the optical signal. The first displacement direction is at a first oblique angle from the transverse direction.

Abstract: A low cost compact integrated 4-port single-channel OADM with improved optical isolation and low insertion loss is provided in which a 4-fiber pigtail includes I/O fibers and add/drop fibers, which are arranged on the same side of the multiplexer. A lens, filter and reflector are arranged in a double-pass configuration to route the optical signals to and from the appropriate fibers. The fibers are suitably arranged with the input and drop fibers at the corners of one diagonal and the output and add fibers at the corners of the crossing diagonal with the midpoints of the diagonals intersecting. Furthermore, a point halfway between the input and output fibers suitably lies at or near the central axis of the collimating lens.

Abstract: A method and system for providing an optical switch is described. The method and system include providing a triple fiber collimator, a beam deflector and a reflector. The triple fiber collimator is for receiving an optical signal from a first fiber and outputting the optical signal to a second fiber or a third fiber. The beam deflector has a first portion and a second portion. The beam deflector resides between the reflector and the triple fiber collimator. The optical signal travels through the first portion of the beam deflector, is reflected by the reflector and is output over the second fiber when the beam deflector is in a first position. The optical signal travels through the second portion of the beam deflector, is reflected by the reflector and is output over the third fiber when the beam deflector is in a second position.

Abstract: A method and system for providing a dense wavelength division multiplexer is disclosed. The method and system include providing a dual fiber collimator, a filter and a filter holder. The dual fiber collimator includes a lens and a capillary. The capillary is for holding a plurality of fibers. The filter holder has an aperture therein. The filter is disposed between the dual fiber collimator and the filter holder. The filter has a first surface and a second surface opposite to the first surface. The first surface is covered with a filter coating. The filter is affixed to the filter holder by the second surface.

Abstract: A method and system for providing an isolator/polarization beam deflector is disclosed. The method and system include a first collimator, a core and a second collimator. The first collimator collimates a plurality of optical signals traveling in a first direction. The core receives the optical signals from the first collimator. The core includes first and second birefringent wedges and a rotator between the first and second birefringent wedges. The first collimator, the first birefringent wedge and the rotator transmit the optical signals such that the optical signals cross at an interface between the rotator and the second birefringent wedge. The core transmits the optical signals with a deflection, combines the optical signals to provide a combined optical signal and prevents a reflected portion of the optical signals from traveling opposite to the first direction. The second collimator receives and couples the combined optical signal to the output.

Abstract: A method and system for providing an a configurable optical add/drop module is disclosed. The method and system include providing first and second filters and a beam deflector between the filters. The first filter receives an input signal and an add signal, transmits a portion of the input signal to a drop signal, reflects a remaining portion of the input signal to an express channel and transmits the add signal. The second filter reflects the express channel to an output and transmits the drop signal and the add signal. The beam deflector has a first position and a second position. In the first position the beam deflector transmits the drop signal and add signal so the second filter transmits the drop signal to a drop output and the add signal to the output. In the second position the beam deflector deflects the drop signal and the add signal so the second filter transmits the drop signal to the output and decouples the add signal from the output.