Abstract: A micro- and nano-hot embossing method for an optical glass lens array, including: preparing a mold with a micro-hole array by micro EDM, where the micro-hole array matches an optical glass lens array and the mold is made of a hard metal material which is conductive and meets strength and temperature requirements; preparing a nano nitride-based graded composite coating on a surface of the mold by magnetron sputtering; and pre-fabricating a glass preform and then placing the glass preform on the surface of the mold; heating the glass preform and hot embossing by a glass molding machine in vacuum; cooling in nitrogen atmosphere; and demolding to produce the optical glass lens array. The micro- and nano-hot embossing method of the present invention improves the surface quality of the optical glass lens array and reduces the cost and difficulty for manufacturing.

Abstract: Disclosed is a cross-view image optimizing method and apparatus, and a computer equipment and a readable storage medium.

Abstract: Disclosed is a coating made of an organic material on a mold for glass molding. The coating comprises CrxWyN(1-x-y), where 0.15<x<0.4, and 0.2?y?0.45. The coating has excellent high temperature resistance and anti-adhesion properties, thus being a promising coating material for molds.

Abstract: The present application discloses a human-computer interaction method and an interaction system based on capacitive buttons. The method comprises the following steps: acquiring a capacitive charging signal generated by a user finger-touching a capacitive button; processing the capacitive charging signal to extract Mel-frequency cepstrum coefficient characteristics; and inputting the Mel-frequency cepstrum coefficient characteristics into a trained hidden Markov model, identifying a finger type of the user touching the capacitive button, and further implementing human-computer interaction according to an identification result.

Abstract: Provided is a physical layer blind authentication method for a time-varying fading channel based on a smoothing technique. The method includes that: a transmitter transmits a carrier signal to a wireless channel, the carrier signal includes an authentication signal, a pilot signal and an information signal, and the wireless channel is the time-varying fading channel; a receiver receives the carrier signal, and performs BKIC processing and differential signal processing on the carrier signal to obtain a target authentication signal, performs the differential signal processing on the reference signal to obtain a reference authentication signal, and calculates a correlation between the target authentication signal and the reference authentication signal to obtain a test statistic; and compares the test statistic with a prescribed threshold to determine whether the carrier signal is capable of passing authentication.

Abstract: Disclosed is a blind authentication method for a frequency selective fading channel based on a smoothing technique.

Abstract: Provided is a physical layer blind authentication method for a time-varying fading channel based on belief propagation. The method includes that: a transmitter transmits a carrier signal to a wireless channel, the carrier signal includes an authentication signal, a pilot signal and an information signal, and the wireless channel is the time-varying fading channel; a receiver receives the carrier signal, and performs BKIC processing and differential signal processing on the carrier signal to obtain a target authentication signal, the receiver obtains a reference signal based on a key and the pilot signal, performs the differential signal processing on the reference signal to obtain a reference authentication signal, and calculates a correlation between the target authentication signal and the reference authentication signal to obtain a test statistic; and compares the test statistic with a prescribed threshold to determine whether the carrier signal is capable of passing authentication.

Abstract: Disclosed are coatings made of inorganic materials on molds for glass molding, particularly, a graded coating of element diffusion inhibition and adhesion resistance on molds for glass molding. The graded coating includes a Cr adhesion layer which is bonded with a substrate, a CrN intermediate layer and a CrxWyN(1-x-y) surface layer, where 0.15<x<0.4, and 0.2?y<0.45. The graded coating has excellent crack growth suppression and adhesion resistance.

Abstract: A method of security detection for a physical layer authentication system takes into account the signal-discriminating ability of an active adversary. The distance to the active adversary is estimated by an authorized transmitter based on its broadcast signal and, based on the distance estimate, the signal-to-noise ratio (SNR) of the adversary is also estimated.

Abstract: A micro-structured mold-core of a microfluidic chip and its manufacturing method, which includes the steps of: installing a mold-core on a worktable of a five-axis machining center, and installing a micro-milling cutter and a fine milling-grinding tool on a tool holder of the five-axis machining center; rough-milling a surface of the mold-core using the micro-milling cutter according to a preset first machining track, to form a micro-projection array structure with a specific shape; finishing a surface of the micro-projection array structure formed by rough-milling using the fine milling-grinding tool according to a preset second machining track, to form a desired micro-projection array structure; and installing the mold-core on an injection molding machine, and adding particle material of polymer for micro injection molding to form a microfluidic chip, or installing the mold-core on a hot-embossing machine, and adding block material of polymer for hot embossing to form a microfluidic chip.

Abstract: A method is disclosed. The method includes obtaining an object for prediction and a plurality of candidate scenes by a computer device; inputting the object for prediction and a current candidate scene to a distance measurement model, the distance measurement model calculates a feature vector corresponding to the current candidate scene based on a trained scene feature subnetwork, and outputs a distance from the object for prediction to the current candidate scene based on the object for prediction and the feature vector corresponding to the current candidate scene, model parameters of the distance measurement model including a parameter determined by a trained object feature subnetwork; obtaining distances from the object for prediction to the plurality of candidate scenes based on the distance measurement model; determining a target scene corresponding to the object for prediction based on the distances from the object for prediction to the plurality of candidate scenes.

Abstract: A method for image classification includes acquiring a to-be-classified image and inputting the to-be-classified image to a trained image classification model, the trained image classification model includes a localization segmentation sub-network, an alignment sub-network, and a classification sub-network, the alignment sub-network is formulized as a valve linkage function, the image classification model is obtained, and in a forward-propagation phase, an output of the valve linkage function is an aligned image; in a backward-propagation phase, the output of the valve linkage function is a function; subjecting the to-be-classified image through the localization segmentation sub-network for locating and segmenting a target object of the to-be-classified image to obtain a segmented image; subjecting the segmented image through the alignment sub-network, the alignment sub-network aligning the target object to obtain an aligned image; and subjecting the aligned image through the classification sub-network for fi

Abstract: The present disclosure provides a conductive paste for preparing flexible porous piezoresistive sensor, a method for making the same, and application thereof. The conductive paste includes a conductive carbon material, a sacrificial template and a high molecular polymer matrix. The high molecular polymer matrix includes a high molecular polymer and an organic solvent, and the mass ratio of the high molecular polymer to the organic solvent is 1:2 to 1:3; and based on the total mass of the conductive carbon material, the sacrificial template and the high molecular polymer, the mass percentage of the conductive carbon material is 2%-5%, the mass percentage of the sacrificial template is 75%-85%, and the mass percentage of the high molecular polymer is 10%-23%. This disclosure uses a sacrificial template with adjustable particle size to prepare conductive paste, greatly increasing number of nanopores or micropores after conductive paste is formed into a film.

Abstract: A method and a device of acquiring an appearance model, a computer device and a storage medium. The method includes acquiring a set of target point clouds, the set of target point clouds including at least two point clouds, each of the point clouds being obtained by sampling a local area of a target object; then performing a registration and a completion for the at least two point clouds to obtain a processed point cloud, wherein the registration is to transform different point clouds into a same coordinate system, and the completion is to add points in other areas of the object according to existing points in a point cloud to be completed; and finally acquiring the appearance model of the target object according to the processed point cloud. The method can improve applicability of the appearance model of the target object acquired only by registration technique.

Abstract: The present disclosure relates to a broadband optical parametric chirped pulse amplifier insensitive to temperature comprises the first pulsed laser, the second pulsed laser, a pulse stretcher and a periodically poled nonlinear crystal. Via the proper arrangement of the non-collinear angles between the transmission directions of the signal light, the pump light and the idler light, to simultaneously satisfy the angular relationship required for constructing the non-collinear phase-matching configuration insensitive to wavelength and that required for constructing the non-collinear phase-matching configuration insensitive to temperature, the optical parametric chirped pulse amplifier not only can realize a broadband parametric amplification of the signal light (insensitive to wavelength), but also can effectively alleviate the phase mismatch in nonlinear crystal resulted from the excessively high local temperature (insensitive to temperature).

Abstract: Provided by the present invention is a cathode material for a sodium-ion battery with a coating structure and a preparation method therefor. In the present invention, an Na3V2(PO4)3/C cathode material is prepared by means of a sol-gel method. Synthesized zwitterionic polymers may be used as chelating agents and as a carbon source; the process is simple, can quickly form a gel, and the reaction time is shortened contains a zwitterionic structure which may be well dissolved with the precursor of sodium vanadium phosphate to form a stable carbon coating layer. Compared to the prior art, the cathode material for a sodium-ion battery of the present invention enhances the electrical conductivity and cycle performance of the cathode material by means of the doping of nitrogen and sulfur on carbon. At the same time, the prepared cathode material for a sodium-ion battery has sodium vacancies and maintains a stable structure during the process of sodium-ion intercalation/deintercalation.

Abstract: A metal-insulator-metal (MIM) high-sensitivity plasmon polariton (SPP) terahertz wave detector includes a rectangular cavity, an absorption cavity, a silver block, two waveguides, three metal films, a terahertz probe light, a signal light, and an opto-electric detector; the terahertz probe light is located at an upper end of the rectangular cavity; the rectangular cavity is located at an input end of the terahertz probe wave; and the absorption cavity is connected with a first waveguide; the silver block is disposed within the first waveguide, and is movable; and the first waveguide is connected with a second waveguide.

Abstract: A wireless communication method and device include: a transmitting device dividing a to-be-transmitted signal into a plurality of packets by using a pre-agreed key; acquiring a preset equivocation threshold; according to the equivocation threshold, determining a power parameter adjustment factor for each of the packets; for each of the packets, performing power adjustment on a signal of the packet according to a power parameter adjustment factor of the packet; and transmitting the to-be-transmitted signal after power adjustment. After receiving the signal, the receiving device groups the signals according to the pre-agreed key, and calculates the power of each packet; determines a test statistic according to the power of each packet, and determines the test statistic whether the quantity is greater than or equal to a preset statistic threshold. If so, it determines that the signal is a tag signal, and if not, that it is a regular signal.

Abstract: For wireless communication method, a to-be-transmitting signal is divided into (n+1) packets using a key pre-agreed to by a transmitter and a receiver, where n is a positive integer. The to-be-transmitted signal comprising a regular signal and a tag signal, said tag signal forming an authentication signal. When the difference between received amplitude values of the regular signal and tag signal fail to meet a first pre-determined requirement, a first power parameter adjustment factor is determined for the n packets preceding an (n+1)th packet and a second power parameter adjustment factor is determined for the (n+1)th packet, as well as an energy-limited condition of the to-be-transmitted signal power. The transmitted power of the respective (n+1) packets is then adjusted according to the corresponding power parameter adjustment factor before the to-be-transmitted signal is transmitted.

Abstract: Provided is a physical layer blind authentication method for a time-varying fading channel based on a smoothing technique.