75results about How to "Increase information capacity" patented technology

The invention discloses a multi-channel vector holographic polarization multiplexing method based on a birefringent medium metasurface, and belongs to the technical field of micro-nano optics and holographic multiplexing application. The method comprises the following steps that: the metasurface for achieving the holographic polarization multiplexing is composed of nano column arrays with rectangular cross sections and different geometric dimensions and different azimuth angles; by changing the geometric size and azimuth angles of the nano column unit, the phase and polarization state of the emergent light beam are randomly regulated and controlled by the metasurface; holograms corresponding to different mutually independent original images are obtained by using a GS algorithm; according to the obtained holograms, the geometric size and azimuth angles of the nano column unit are determined by coding so as to generate a processing file of a corresponding medium metasurface structure; the metasurface of the transmission-type medium is processed by adopting a micro-nano processing process of electron beam etching; through the selection of the polarization states of the incident lightbeam and emergent light beam, the combination and multiplexing of seven different polarization images of twelve different polarization channels are achieved.

Disclosed is an authentication method of a dynamic two-dimension code instruction. A dynamic two-dimension code token comprises a collection module, a display module, an authentication module, an instruction module, a management module, a two-dimension code module and a control module. The control module, the management module, the authentication module, the instruction module and the two-dimension code module are integrated in the same microprocessor. The collection module is connected with the control module and the two-dimension code module. The display module is connected with the control module and the two-dimension code module. An authentication system of the dynamic two-dimension code instruction is the integration of service programs for carrying out the functions of authentication of the dynamic two-dimension code instruction, token synchronization, and management and configuration of relevant states of the token. The dynamic two-dimension code instruction has the characteristics of preventing exposure, being high in intensity, unpredictable, resistant to replay and disavowal, free of memory, accurate and efficient, and having physical isolation and bidirectional authentication, and safety of identity authentication is improved remarkably.

The invention discloses a berry phase metasurface-based multi-plane holographic multiplexing method, and belongs to the field of micronano optical and holographic multiplexing application. The berry phase metasurface-based multi-plane holographic multiplexing method comprises the steps of achieving phase recovery by a 3D-Fienup algorithm, taking different numerical values of reproduction positions of different images, and acquiring a computer generation holographic diagram containing all information; selecting a metal coupling polaron as a berry phase metasurface structure unit, achieving phase modulation based on a berry phase modulation principle, and enabling a polarization state to become a multiplexing path by coding a holographic phase profile conjugated with an original phase to achieve a holographic multiplexing passage selected by circular polarization; making a metasurface phase sheet for recording the computer generation holographic diagram, selecting an emergent circular polarization light orthogonal to chirality of the polarization stat, and optically reproducing a three-dimensional object or a wave surface which is recorded. The holographic multiplexing method with sub-wavelength pixel of visible light and near-infrared bands, ultrathinness, large visual angle and large capacity is provided by the invention; and moreover, the crosstalk can be effectively reduced, and the holographic multiplexing of circular polarization selectivity is achieved.

The invention discloses an entity input method and an entity input device and relates to the field of input methods. The method comprises the steps of receiving an input sequence which is input; obtaining at least one initial candidate item corresponding to the input sequence; performing semantic analysis to the initial candidate item based on a knowledge base, and querying a target object from the knowledge base according to the semantic analysis result; packaging the knowledge content corresponding to the target object to be an entity candidate item, and loading to each candidate item corresponding to the input sequence; displaying the entity candidate item in a candidate frame according to the position of the initial candidate item. According to the entity input method, the entity candidate item which more accords with a current input scene can be selected to be loaded into each candidate item, and thus the target object can be directly displayed to users in an entity object form, the information capacity and accuracy of the input method are improved, the input fluency of the complex information is enhanced, and the input efficiency is improved.

The invention provides a high-speed changing chaotic photoelectric oscillator and a chaotic signal generation method thereof, and belongs to the technical field of microwave photonics. The chaotic photoelectric oscillator includes a frequency sweeping laser, a phase modulator, a circulator, a linearly chirped fiber Bragg grating, a photoelectric detector, an electrical amplifier and a beam splitter, the frequency sweeping laser, the phase modulator, the circulator and the photoelectric detector are mutually connected to form a straight line, the linearly chirped fiber Bragg grating is connected to the circulator, and the photoelectric detector, the electrical amplifier, the beam splitter and the phase modulator are mutually connected to form a loop. By controlling the power, the polarization state and other conditions of signals in a circuit, the circuit can enter into a chaotic state and output a chaotic signal, and combined with periodically varying optical signals output by the frequency sweeping laser, the chaotic photoelectric oscillator can output the high-speed changing chaotic signal.

The invention relates to an all-medium metasurface color printing and holographic encryption co-modulation method, which belongs to the technical field of micro-nano optics. The method uses an amorphous silicon-coupled polar antenna and an amorphous silicon nanorod antenna with different spectral responses to spatially arrange a color-printed target pattern on the metasurface, the in-plane azimuthis used at the same time to take a pixel as a unit to code the spatial phase distribution of a metasurface hologram corresponding to a different wavelength, the metasurface color printing technologyand a wavelength-multiplexed metasurface hologram set are integrated in a single-layer all-medium metasurface. The all-medium metasurface is rendered as a micro-color image under the illumination of white light. Different holographic reconstruction images are reconstructed in a far field under irradiation of coherent monochromatic lasers with specific wavelengths, and the information capacity is extremely high. The invention also provides a method of hiding secret information, which has great potential in many fields such as data storage, holographic display, information encryption, and forgery prevention.

The invention relates to the technical field of information, in particular to a two-dimensional code generation method. The method comprises the following steps that: obtaining target information which needs to be borne by a two-dimensional code; dividing the target information into a plurality of coding units; according to a mapping relationship between different coding units and vector geometricfigures, determining the vector geometric figures independently corresponding to the plurality of divided coding units, wherein different vector geometric figures have different figure shapes and/ orcolor distribution; and combining vector geometric figures independently corresponding to the plurality of divided coding units to generate a figure two-dimensional code. The invention also providesa two-dimensional code generation device and electronic equipment.

The invention provides a sub-wavelength structure for realizing structural color and holographic double anti-counterfeiting effect. The sub-wavelength structure comprises a metal substrate, a metal sub-wavelength structure and a medium protecting layer from bottom to top, wherein the medium protecting layer is only required when the selected metal material is easy to oxidize. The sub-wavelength structure is characterized in that under the function of transmission surface plasma resonance and local surface plasma resonance excited by the metal sub-wavelength structure, the super-narrow band circular polarization conversion is realized, and the high-purity color display is realized; by rotating an anisotropy structure, the geometric phases can be introduced without change of the structural color, the holographic codes are calculated by intersection and combination, and the completely different holographic images can be obtained in a far field; by changing the cycle and size of the sub-wavelength structure, the fork circular polarization spectrum line peak wavelength can cover the whole light wave band, so as to realize the full-color display; the anti-counterfeiting technique based on the sub-wavelength structure can be used for gradually troubleshooting, the structural color is suitable for initial inspection, and the holography is suitable for final inspection. The sub-wavelength structure has the advantages that the security class is high, the imitating threshold of a main template is high, the imitating cannot be reached within shorter time, and the structure is simple.

The invention provides a phase change memory, and especially provides the phase change memory with a film having threshold voltage switch (OTS) characteristics as a gating switch. The film having the OTS characteristics as the gating switch of the phase change memory can prevent an unintentional operation of an unselected phase change memory unit, and plays same roles as other gating switches, such as field effect transistors, diodes and the like. Utilization of the film having the OTS characteristics as the gating switch of the phase change memory can effectively reduce preparation process steps of the gating switch, and reduces the size of the gating switch. Therefore, the utilization of the film having the OTS characteristics as the gating switch of the phase change memory has greater superiorities in reducing the cost and improving the memory density.

The invention discloses an image processing method of a coded pulse sequence. The image processing method comprises the following steps: performing multi-layer information coding on an image, and coding information of different layers of the image into a pulse sequence according to a time sequence relationship; converting an image into a grayscale image and standardizing the grayscale value of theimage; encoding the shape, the feature points, the color and the texture of the grayscale image into pulses; and arranging the coded pulses according to a set sequence to form a string of pulse sequence. According to the invention, the information of each layer carried by the image is effectively utilized, and meanwhile, the non-key information is reduced. For the spiking neural network, the information completeness of the pulse sequence input by the neural network is improved, and the redundancy of information is reduced, and the information processing efficiency of the spiking neural network can be improved. For signal processing, the information capacity of an information source and the coding efficiency of information are improved.

A multiple-input multiple-output space light communication system comprises an emission terminal and a receiving terminal connected with the emission terminal. The emission terminal includes an information source module, a beam combiner module and an emission antenna module; the receiving module includes an extra-large array receiving module, an array detector module and a signal processing module; the beam combiner module is configured to perform beam combination of n-way signals outputted by the information source module and output one-way signal light; the emission module is configured to emit the signal light outputted by the beam combiner and transmit the signal light to the receiving terminal in the space long-distance transmission mode; the extra-large array receiving module is configured to receive the n-way signal light emitted by the emission terminal, and each optical lens in the extra-large array receiving module collects the signal light to a detector at the back; the array detector module is configured to perform photovoltaic conversion of the received signal light and output electric signals; and the signal processing module is configured to process and output digital signals.

The invention discloses a multifunctional coding metasurface for regulating and controlling electromagnetic wave transmission, relates to the technical field of coding metasurfaces, and aims to solvethe problems of limited working mold and limited function of a traditional coding metasurface. The multifunctional coding metasurface comprises a reflecting layer, a filtering layer and two transmission layers which are sequentially stacked from top to bottom, and every two adjacent layers are connected through a square dielectric layer. The reflecting layer is of a cross-shaped structure, a strip-shaped body is vertically arranged at each of the two ends of a trunk of the cross-shaped structure, and the filtering layer comprises a square ring with diagonal openings and a square patch locatedin the geometric center of the square ring. The transmission layer comprises two G-shaped structures, the two G-shaped structures are arranged in a central symmetry manner, and the geometric center ofthe reflecting layer, the geometric center of the filtering layer, the geometric center of the transmission layer and the geometric centers of all the dielectric layers are coaxially arranged. The multifunctional coding metasurface has important application in the fields of antennas, beam splitting, holograms and the like.

The invention relates to a relay lens structure of a 4K laparoscope. The relay lens structure is composed of two completely symmetrical lens groups which are sequentially glued into a whole in the light direction; and the relay lens structure is characterized in that each lens group comprises a first lens, a second lens, a third lens and a fourth lens, wherein the end face of one side of the firstlens is of an even aspheric surface structure, the end face of the other side of the first lens is a convex face, the end face of one side of the second lens is a concave face, the end face of the other side of the second lens is a plane, the end face of one side of the fourth lens is a plane, the end face of the other side of the fourth lens is of an aspheric surface structure, the convex face of the first lens and the concave face of the second lens are opposite and glued into a whole, the plane of the second lens and the end face of one side of the third lens are opposite and glued into awhole, and the end face of the other side of the third lens and the plane of one side of the fourth lens are opposite and glued into a whole. According to the relay lens structure, in order to realizeperfect aberration elimination under the condition of high numerical aperture, meanwhile, the field curvature is balanced, so that the 4K resolution can be met.

The invention discloses an information capacity expansion method for a chipless RFID electronic tag and relates to an optimization technology for chipless RFID tags. According to the method, information capacity of the chipless RFID electronic tag is expanded, an arc-shaped defected ground structure is innovatively added against the defect that a chipless RFID tag of an original structure has small capacity, the tag realizes hybrid coding by use of frequency characteristics and amplitude characteristics of signals, and therefore the information capacity of the tag is increased.

The invention discloses a method and a device for printing bill information. The method comprises the following steps of: processing the content information of a bill to be printed to form a character string; representing a '1' module of a binary system by using four printing points to obtain a matrix two-dimensional code of the character string, wherein every two of the four printing points are spaced by one printing blank space; and printing the content information and the matrix two-dimensional code on the bill. By the method and the device, the condition that the bill is punched when the multiplicate bill is subjected to two-dimensional code printing by using a needle printer is effectively avoided, so that the device can be used for performing two-dimensional code verification on a large number of bills, the information capacity of unit area is increased, and the problems in the prior art are solved.

The invention discloses a commodity anti-fake method and an anti-fake scanning device and relates to information processing technology. The commodity anti-fake method includes the following steps: 1), encoding product information to form an anti-fake code; 2), arranging an anti-fake graph area on the surface of a commodity packaging material, wherein the anti-fake code acquired in the step 1) is arranged in the anti-fake graph area. The commodity anti-fake method is characterized in that the anti-fake code comprises a color two-dimension code graph portion and a digital code portion, the color two-dimension graph is a two-dimension code graph comprising at least three areas different in core, and color distribution information includes part of the product information. The commodity anti-fake method has the advantages that the commodity anti-fake method combines the advantages of two-dimension code anti-fake and coating anti-fake; due to a measure of encoding anti-fake information to be color distribution information, information capacity of an anti-fake code is improved, counterfeiting difficulty is increased, and the anti-fake scanning device is more attractive in appearance.

The invention discloses a high-capacity information transmission method based on a two-dimensional code, and the method comprises the steps: to-be-transmitted information being coded into a pluralityof information two-dimensional codes in an information transmission process, and two-dimensional code decoding information being coded into a decoding two-dimensional code; combining the decoded two-dimensional code and the information two-dimensional code to form a two-dimensional code unit; encrypting and coding each two-dimensional code unit; in the information receiving process, an informationreceiver firstly acquiring coded information and searching a coded code comparison table to determine a decryption method; and decrypting, sequencing and splicing each piece of two-dimensional code information in the two-dimensional code units according to the decoding information, and splicing the information of each two-dimensional code unit in sequence. According to the invention, informationis encoded into a plurality of information two-dimensional codes, and the two-dimensional codes and the information two-dimensional codes are decoded and combined to form a decodable two-dimensional code unit. And the encoding, transmission and decoding of the information take one two-dimensional code unit as a unit, so that the information capacity and the information security degree of the two-dimensional code are greatly improved.

The invention provides an MPEG-video-compression-domain-based integrity watermark embedding and detection method. The method comprises: step one, generating integrity watermark information; step two, embedding group sequence watermark information and intra-group frame sequence watermark information in the integrity watermark information into Cr chrominance blocks and Cb chrominance blocks of embedded points of I frames of all pictures of an MPEG video and embedding group sequence watermark information and intra-group frame sequence watermark information in the integrity watermark information into a first luminance block and a fourth luminance block of a macro block of embedded points of all pictures of the MPEG video respectively; and step three, carrying out integrity watermark information extraction on the MPEG video with the integrity watermark information and detecting the extracted integrity watermark information. With the method, the watermark detection method has high fault tolerance, so that the watermark robustness can be enhanced; and the information capacity of integrity watermark can be improved and reliability and accuracy of tampering detection can be enhanced.

The invention discloses a multi-channel full duplex Internet of Things gateway based on LoRaWAN, which comprises a main control chip and a power supply and further comprises a network module communicating with a mobile network and an Ethernet, a LoRa module used for processing the sent and received LoRa data, and a duplexer connected with the LoRa module and used for isolating the transmitted andreceived data. According to the scheme, the duplexer is used, so that the gateway is changed into FDD from TDD, meanwhile, the number of downlink channels is increased, the communication capacity of the LoRaWAN gateway is improved, and the equipment operation efficiency, the communication quality and the network capacity are improved. The gateway has the substantial effects that data can be received and sent at the same time, the information capacity is high, the uplink and downlink channel proportion is relatively high, and the gateway has the characteristics of high signal intensity, high communication quality, accurate positioning and high power supply reliability.