Abstract: Disclosed is a non-blind-area multi-view panoramic stereo imaging device. The device comprises a front lens assembly or a plane mirror, an aspheric mirror, a middle lens assembly, a panoramic block, a rear lens assembly and an image surface which are longitudinally arranged along an optical axis. The aspheric mirror comprises a central hole and an annular reflecting surface. The panoramic block comprises a front central circular transmission surface, a front reflecting surface, a front transmission surface, a rear reflecting surface and a rear transmission surface. The front reflecting surface, the front transmission surface and the rear reflecting surface are all annular surfaces. The inner edge of the front reflecting surface is connected with the edge of the front central circular transmission surface.

Abstract: A display method for a display panel, and an electronic device. The electronic device stores at least two compensation gray level relationships, a first compensation gray level relationship matches a first gray level range, a second compensation gray level relationship matches a second gray level range, the first compensation gray level relationship is fitted and generated based on an N-nomial algorithm, and the second compensation gray level relationship is obtained in a linear interpolation manner. A gray level value within the first gray level range is greater than a gray level value within the second gray level range. The method includes: obtaining a gray level value of each pixel of an input image; performing gray level compensation on the input image based on the gray level value of each pixel and the at least two compensation gray level relationships; and displaying a compensated image.

Abstract: A circuit board and a manufacturing method thereof, and a terminal device, and relates to the technical field of terminals, to resolve the problem of low reliability of connection between a radio frequency front-end circuit and a radio frequency back-end circuit in a circuit board of a terminal device in a related technology. The circuit board includes a substrate and a liquid metal body, where the substrate is provided with a radio frequency front-end circuit, a radio frequency back-end circuit, and a pad group, where the pad group includes a first pad electrically connected to the radio frequency front-end circuit and a second pad electrically connected to the radio frequency back-end circuit, and the second pad is spaced apart from the first pad; and the liquid metal body is arranged at a position of the pad group and connects the first pad to the second pad.

Abstract: A radar system that can block false echoes includes: a local oscillator configured to generate a chirp signal comprising a plurality of chirps, each having a corresponding envelope; a transmitter configured to transmit a signal corresponding to the chirp signal; and a modulation circuit configured to modulate the transmitted signal by regulating a magnitude of one or more portions of the chirp envelopes in a predetermined pattern such that the radar system can discern false echoes which do not match the pattern.

Abstract: The present disclosure provides a greenhouse gas emission reduction method for a heavy metal contaminated soil, falling within the technical field of emission reduction of greenhouse gas nitrous oxide. Specifically, hydroxyapatite (HAP) is added to a soil to effectively reduce the emission of nitrous oxide in the soil, and at the same time, the treatment of heavy metal contamination is realized, which is very suitable for the promotion and use of nitrous oxide emission reduction in the contaminated soil.

Abstract: A cancer detection model and a construction method therefor, and a reagent kit, relating to the technical field of cancer detection. The method comprises: performing whole genome sequencing on plasma free DNA to mine nucleosome distribution features, terminal sequence features, and fragment size distribution features that can be applied to cancer detection; constructing classification models of the three indicators to obtain prediction scores of each indicator for a sample; then integrating these scores using a logistic regression model, and adding copy number variation feature information to obtain an ultimate classification and prediction model.

Abstract: This application provides a multi-screen data processing method, an electronic device, and readable storage medium, and belongs to the field of electronic device technologies. The electronic device includes: a control chip including a first display serial interface DSI and a second display serial interface DSI, where the first DSI and the second DSI are connected with input ports of a display chip respectively and are configured to provide a first data signal to the display chip; an output port of the display chip is connected with a first display of a plurality of displays, the control chip is configured to control the display chip to output the first data signal or a second data signal to the first display; and/or the control chip is configured to control the output port of the display chip to output first data or second data to a second display other than the first display.

Abstract: A 4K high-resolution panoramic annular optical system includes a panoramic annular lens head unit, a subsequent lens group, and a 4K sensor (SE) that is coaxially installed. The panoramic annular lens head unit includes a first lens (PALIPAL1) and a second lens (PAL2). The subsequent lens group includes a third lens (RL1), a fourth lens (RL2), a fifth lens (RL3), a sixth lens (RL4), a seventh lens (RL5), an eighth lens (RL6), and a ninth lens (RL7) that are arranged in order from an object plane to an image plane. The first lens (PAL1) and the fifth lens (RL3) are meniscus glass lenses with positive refractive power. The six lens (RL4) and the ninth lens (RL7) are meniscus glass lenses with negative refractive power, and the second lens (PAL2), the fourth lens (RL2), the seventh lens (RL5), and the eighth lens (RL6) are biconvex lenses with positive refractive power.

Abstract: The present disclosure provides a greenhouse gas emission reduction method for a heavy metal contaminated soil, falling within the technical field of emission reduction of greenhouse gas nitrous oxide. Specifically, hydroxyapatite (HAP) is added to a soil to effectively reduce the emission of nitrous oxide in the soil, and at the same time, the treatment of heavy metal contamination is realized, which is very suitable for the promotion and use of nitrous oxide emission reduction in the contaminated soil.

Abstract: This application discloses a circuit board and a manufacturing method thereof, and a terminal device, and relates to the technical field of terminals, to resolve the problem of low reliability of connection between a radio frequency front-end circuit and a radio frequency back-end circuit in a circuit board of a terminal device in a related technology. The circuit board includes a substrate and a liquid metal body, where the substrate is provided with a radio frequency front-end circuit, a radio frequency back-end circuit, and a pad group, where the pad group includes a first pad electrically connected to the radio frequency front-end circuit and a second pad electrically connected to the radio frequency back-end circuit, and the second pad is spaced apart from the first pad; and the liquid metal body is arranged at a position of the pad group and connects the first pad to the second pad, so as to electrically connect the radio frequency front-end circuit to the radio frequency back-end circuit.

Abstract: A data processing method for acoustic event includes: establishing a simulated acoustic frequency event module, a data capturing module, and a sound application decision module in a software manner, setting a simulated hardware parameter to the simulated acoustic frequency event module, inputting a sound signal to a frequency filtering module of the simulated acoustic frequency event module, and obtaining metadata from a frequency event quantizer of the simulated acoustic frequency event module, dividing each of the metadata into multiple frames according to a time interval by the data capturing module, accumulating an event number of each frame by the data capturing module, setting a label of each frame according to the event number, storing these frames, the event number and the label in a database, and training a decision model by the sound application decision module according to the database and a sound application.

Abstract: Disclosed is a non-blind-area multi-view panoramic stereo imaging device. The device comprises a front lens assembly or a plane mirror, an aspheric mirror, a middle lens assembly, a panoramic block, a rear lens assembly and an image surface which are longitudinally arranged along an optical axis. The aspheric mirror comprises a central hole and an annular reflecting surface. The panoramic block comprises a front central circular transmission surface, a front reflecting surface, a front transmission surface, a rear reflecting surface and a rear transmission surface. The front reflecting surface, the front transmission surface and the rear reflecting surface are all annular surfaces. The inner edge of the front reflecting surface is connected with the edge of the front central circular transmission surface.

Abstract: This application discloses a circuit board and a manufacturing method thereof, and a terminal device, and relates to the technical field of terminals, to resolve the problem of low reliability of connection between a radio frequency front-end circuit and a radio frequency back-end circuit in a circuit board of a terminal device in a related technology. The circuit board includes a substrate and a liquid metal body, where the substrate is provided with a radio frequency front-end circuit, a radio frequency back-end circuit, and a pad group, where the pad group includes a first pad electrically connected to the radio frequency front-end circuit and a second pad electrically connected to the radio frequency back-end circuit, and the second pad is spaced apart from the first pad; and the liquid metal body is arranged at a position of the pad group and connects the first pad to the second pad, so as to electrically connect the radio frequency front-end circuit to the radio frequency back-end circuit.

Abstract: The disclosure relates to a data processing device for driving assisting, a data processing method for driving assisting, and associated storage medium and vehicle. The data processing device for driving assisting includes: a data processing system configured to receive and process a plurality of vehicle data; and a processing control system configured to perform degradation control under the condition that the data processing system is degraded, to receive and process the plurality of vehicle data in a degradation mode. The data processing device for driving assisting, the data processing method for driving assisting, and the associated storage medium and vehicle perform reasonable division of processing task and degradation control on the data processing system and the processing control system, thereby under the condition that modules in the data processing device stop operating, other modules can be allocated to take over the task timely and effectively.

Abstract: The present disclosure provides an apparatus and method for wavefront reconstruction based on rotationally symmetric extended structured light illumination. The apparatus includes a laser device, a neutral density filter, a microscope objective, a pinhole, a collimating lens, a beam splitter prism, a spatial light modulator, a lens to be measured, and an image acquisition device that are sequentially arranged. The method permits modulation of incident parallel light into phase grating-like structured light by using a spatial light modulator. Based on the characteristic of non-infinitely small pixel unit of the spatial light modulator, changing the modulation pattern of the spatial light modulator may result in different forms of structured light. Not only the object to be measured but also the real structured light wavefront can be recovered by acquiring diffraction spots at the focal plane and simultaneously updating the object plane and the structured light plane using an algorithm.

Abstract: An automotive radar system includes multiple radar antennas and a radar front end chip. The front end chip includes a plurality of phase rotators coupled to a local oscillator, wherein each phase rotator of the plurality of phase rotators is coupled to multiple digital phase modulators; a plurality of switches that couple selectable ones of the multiple digital phase modulators to respective amplifiers, each amplifier coupled to a respective antenna output; and a controller which provides digital control signals to the plurality of phase rotators, the multiple digital phase modulators, and the plurality of switches to synthesize transmit signals for each of the multiple radar antennas.

Abstract: An automotive radar system includes multiple radar antennas and a radar front end chip. The front end chip includes a plurality of phase rotators coupled to a local oscillator, wherein each phase rotator of the plurality of phase rotators is coupled to multiple digital phase modulators; a plurality of switches that couple selectable ones of the multiple digital phase modulators to respective amplifiers, each amplifier coupled to a respective antenna output; and a controller which provides digital control signals to the plurality of phase rotators, the multiple digital phase modulators, and the plurality of switches to synthesize transmit signals for each of the multiple radar antennas.

Abstract: The disclosure provides a device for detecting a wavefront error by modal-based optimization phase retrieval using an extended Nijboer-Zernike (ENZ) theory. The detection device includes a point light source (1), a half mirror (2), a lens (3) to be tested, a plane mirror (4) and an image sensor (5). The wavefront error of the component under test is characterized by using a Zernike polynomial, and a Zernike polynomial coefficient is solved based on an ENZ diffraction theory. The present disclosure realizes the one-time full-aperture measurement on the wavefront error of a large-aperture optical component, and can use a partially overexposed image to achieve accurate wavefront error retrieval. Meanwhile, the present disclosure overcomes the contradiction between underexposure and high signal-to-noise ratio (SNR) caused by a limited dynamic range when the image sensor (5) acquires an image. The detection device is simple and does not have high requirements for the experimental environment.

Abstract: A radar system that can block false echoes includes: a local oscillator configured to generate a chirp signal comprising a plurality of chirps, each having a corresponding envelope; a transmitter configured to transmit a signal corresponding to the chirp signal; and a modulation circuit configured to modulate the transmitted signal by regulating a magnitude of one or more portions of the chirp envelopes in a predetermined pattern such that the radar system can discern false echoes which do not match the pattern.

Abstract: The disclosure relates to a Lidar apparatus. The Lidar apparatus includes an area array light source, an emitting lens group, a receiving lens group, and an area array detector, where the area array light source is located in the front focal plane of the emitting lens group, and the area array detector is located in the back focal plane of the receiving lens group; a laser beam emitted from the area array light source is transmitted, through the emitting lens group, to an object to be detected and reflected by the object to be detected, and a reflected laser beam is transmitted to the area array detector through the receiving lens group; and a foveated optical system is used for each of the emitting lens group and the receiving lens group, and the image height of the foveated optical system is directly proportional to a tangent value of a field of view, such that angular resolutions of the Lidar apparatus are approximately distributed evenly. The disclosure further relates to a Lidar device and a vehicle.