17 results about "Particle array" patented technology

The invention discloses a method and a system for identifying an anti-counterfeit label. The method comprises the following steps: acquiring spectral response characteristics of the anti-counterfeit label to be identified through a multiband optical sensor; extracting a dynamic coding area and a base material characteristic area in the spectral response characteristics, wherein the dynamic coding area comprises topological distribution information of a programmable encryption particle array; processing the topological distribution information of the dynamic coding region through a feature compression algorithm to generate a first verification factor, and extracting a spatial frequency feature of the base material feature region as a second verification factor; and uploading the first verification factor and the second verification factor to a cloud verification platform through a secure communication protocol, wherein the cloud verification platform is internally provided with a dynamic spectral feature library and a physical feature association model. According to the invention, through a double-engine architecture of programmable dynamic target and environment adaptive verification, the problems of static replicability and environment vulnerability of physical anti-counterfeiting are solved, and collaborative rise of anti-counterfeiting strength and use reliability is realized.

The invention relates to the technical field of electric digital data processing security, and discloses a solid state disk data encryption method and a solid state disk. According to the method, a national cryptographic algorithm hardware encryption and decryption co-processing module is serially arranged on a data bus between a main control chip and a flash memory particle array, so that transparent encryption of write-in data and transparent decryption of read-out data are realized; the module performs encryption and decryption based on an SM4 algorithm and an XTS advanced encryption standard mode in combination with a logic address as an adjustment value, and securely injects a root key through an out-of-band interface to derive a data key. The system comprises a main control chip, a flash memory array and the co-processing module, wherein the co-processing module is integrated with a hardware encryption and decryption engine, a key management unit and data flow control logic. On the premise that a general main control chip is not changed, high-performance, high-compatibility and high-security national cryptographic hardware-level full-disk encryption is realized.

The invention discloses a high-chromium polyhedral grinding medium and a preparation method thereof, and belongs to the technical field of material processing. A strengthening area is limited in a spherical crown body with the vertex as the center and the radius not larger than 0.5 mm, a WC-Co particle array gradient strengthening structure is constructed in the area, and the concentration of the WC-Co particle array gradient strengthening structure is in exponential attenuation distribution C (x) = C0.e-0. 2x from the vertex center to the edge direction. The diameter of the WC-Co particles is controlled within the range of 0.05-0.1 mm, and the surfaces of the WC-Co particles are wrapped with transition interface layers which are composed of Cr3C2 particles and have the thickness of 0.02-0.05 mm. The problem of fracture caused by vertex stress concentration is effectively solved, the wear resistance and the service life of the grinding medium are remarkably improved, meanwhile, interface stripping failure caused by a strengthening structure is avoided, the method is compatible with an existing high-chromium iron process, the industrialization implementation cost is increased limitedly, and the method is suitable for industrial production. And a more reliable and efficient grinding medium solution is provided for an industrial ball milling system.

The invention is suitable for the technical field of anisotropic conductive film manufacturing, and provides an anisotropic conductive film based on ink-jet printing and a preparation method thereof, and the method comprises the following steps: S1, preparing conductive ink which comprises conductive particles, a binder and a solvent; s2, printing the conductive ink to the surface of a base material through ink-jet printing equipment according to a preset pattern and a preset interval to form a conductive particle array; s3, carrying out curing treatment on the conductive particle array; and S4, laminating and covering a bonding layer on the cured conductive particle array to obtain the anisotropic conductive film, according to the invention, a conductive film manufacturing process with low cost, digitization and strong controllability can be realized, the electrical property stability and the connection repeatability of a product are improved, and the requirements of micro-spacing electronic packaging, high-definition display devices and the like on high-precision particle arrangement are met.

The invention relates to the technical field of simulation, in particular to an elastic-plastic smooth particle state updating method and device. Initializing the particle swarm variable array according to the simulation parameters; performing neighborhood search on the initialized variable array according to a preset particle support domain radius to obtain adjacent particle list data; determining a GPU parallel computing state according to the adjacent particle list data, and generating the GPU parallel computing state according to the adjacent particle list data; performing thread distribution on each particle in the initialized variable array; calculating the initialized variable array according to a thread distribution result to obtain a state parameter; performing state updating on all particles in the initialized variable array according to the state parameters; according to the scheme, simulation parameters are read, a particle swarm is initialized, a particle support domain radius neighborhood search is combined with a GPU state, a one-particle-thread parallel architecture is used, a particle array is updated, multi-time-step simulation is achieved, universality and expansion are considered, and multi-field engineering simulation is supported.

The application discloses a target detection method and system and a storage medium, and the method comprises the following steps: preprocessing millimeter wave radar point cloud data to obtain pedestrian target point cloud data; setting initial values of a particle filtering algorithm; initializing a Dirac particle array in the particle filtering algorithm by using radar precision, tracking frame number and number; predicting the pedestrian target and outputting a prediction value; performing target matching by using particle filtering, updating particle weights and normalizing; and updating a target pool to output a target. The application solves the problem of visual target jumping in insufficient light and the problem of misidentification or missed identification caused by excessive clutter in a relatively closed space of the millimeter wave radar, and can obviously improve the identification accuracy of the pedestrian target, thereby improving the safety of driving.

A method for changing an inter-particle distance (D) between particles (1) arranged in a particle array (2) is provided, the method comprises creating a primary optical lattice (10), loading the particles (1) into the primary optical lattice (10) such that the particles (1) are trapped in the primary optical lattice (10), changing a primary-lattice spacing (L1) of the primary optical lattice (10) to change the inter-particle distance (D), creating an auxiliary optical lattice (20), ramping up the auxiliary-lattice and ramping down the primary optical lattice until the particles (1) are trapped in the auxiliary optical lattice (20), setting the primary-lattice spacing (L1) to a different primary-lattice spacing value, ramping up the primary-lattice and ramping down the auxiliary lattice (20) until the particles are trapped in the primary optical lattice (10) again.

The application provides a preparation method of an anisotropic conductive adhesive film and the anisotropic conductive adhesive film. Array distributed conductive microspheres are obtained through a preparation route of a microporous template, the obtained array distributed conductive microspheres are transferred to a first layer of a photo-thermal dual-cured resin adhesive film, a second layer of resin adhesive film is laminated on the first layer of resin adhesive film, the first layer of resin adhesive film is subjected to ultraviolet light pre-curing treatment, pre-curing ensures that the array form of the conductive microspheres is preliminarily fixed in the resin adhesive film, and the particle array type anisotropic conductive adhesive film is obtained. Heat curing is used to further ensure that the adhesive film obtains good bonding strength and conductive performance in the bonding process. Compared with the anisotropic conductive adhesive film of a single curing agent system, the obtained particle array type anisotropic conductive adhesive film has better particle array arrangement, conductive performance and bonding strength when applied to a bonded electrode assembly.

The application relates to the technical field of electric digital data processing security, and discloses a solid state disk data encryption method and a solid state disk. The method realizes transparent encryption of written data and transparent decryption of read-out data by serially arranging a national secret algorithm hardware encryption and decryption coprocessing module on a data bus between a main control chip and a flash memory particle array; the module is based on an SM4 algorithm and an XTS advanced encryption standard mode, combines a logical address as an adjustment value to perform encryption and decryption, and injects a root key through an out-of-band interface to derive a data key. The system comprises a main control chip, a flash memory array and the coprocessing module, the latter integrates a hardware encryption and decryption engine, a key management unit and data flow control logic. The application realizes high-performance, high-compatibility, high-security national secret hardware-level full-disk encryption without changing a general main control chip.

The invention discloses a scattering enhanced optical fiber and a preparation method and application thereof, the scattering enhanced optical fiber comprises a fiber core made of a transparent matrix material, a plurality of particle arrays distributed in the length direction are embedded in the fiber core, and each particle array is composed of a plurality of nano-structure particles; the fiber core is coated with a cladding, and the cladding is coated with a protective layer with an isolation function; the adopted nano-structure particles are metal nano-particles or silicon dioxide nano-particles; the size range of a single nano-structure particle is 10 nm-200 nm, and the distance between adjacent nano-structure particles in a single particle array is 50 nm-500 nm; the particle array is arranged in the fiber core in a distributed mode, structured embedding of nano-structure particles is achieved, the existing thought of uniform doping is broken through, directional enhancement of a scattering cross section is achieved, guaranteed and improved while transmission loss is controllable and low transmission loss is kept, the technology is simplified, the technology controllability is effectively improved, and the application range is wide. The large-scale production is greatly facilitated.

The invention relates to a large-area colloidal nanoparticle array and a preparation method thereof, and the preparation method comprises the following steps: modifying the surface of a substrate with a chemical substance having opposite electrical properties to target adsorption nanoparticles, and preparing a thermoplastic polymer film on the substrate to obtain a thermoplastic polymer film substrate; contacting the thermoplastic polymer film substrate with a PDMS (Polydimethylsiloxane) seal, heating to enable the thermoplastic polymer to enter patterns of the PDMS seal, and forming a thermoplastic polymer array on the substrate; performing plasma etching and dissolution on the thermoplastic polymer array to obtain a surface chemical pattern dot matrix; the substrate with the surface chemical pattern dot matrix is soaked in a nanoparticle solution, nanoparticles are adsorbed, and a nanoparticle array is obtained; the nanoparticle array is transferred using a viscous substance. Compared with the prior art, the method provided by the invention can realize parallel multi-time copy transfer printing, and has the characteristics of simplicity and convenience in operation, low cost, good repeatability and capability of preparing a nano-scale resolution array structure in a large area.

The invention discloses a particle array structure with spiral dichroism and a regulation and control method, and belongs to the field of chiral optics. The particle array structure comprises a plurality of precious metal nanoparticles; the precious metal nanoparticles are distributed in a spiral array, the distances from all the precious metal nanoparticles to a set axis are the same, and the precious metal nanoparticles can be conveniently processed on the side face of the optical fiber. Structural parameters of the spiral array are optimized on the basis of the surface lattice resonance effect, so that the whole structure can excite a strong resonance effect only under irradiation of vortex beams with selected topological charges and does not respond to other vortex beams. Different from the assumption that the spiral dichroism is enhanced by the monomer resonance effect of other single particle structures, the spiral dichroism is enhanced by utilizing the integral resonance effect of a multi-particle structure to generate different responses to vortex light with different topological charges, so that the spiral dichroism is enhanced, and the precise detection and regulation of chiral optical response are met.

The application relates to the field of simulation technology, in particular to an elastic-plastic smooth particle state updating method and device; a particle swarm variable array is initialized according to simulation parameters; neighborhood searching is performed on the initialized variable array according to a preset particle support domain radius to obtain adjacent particle list data; a GPU parallel computing state is determined according to the adjacent particle list data; the GPU parallel computing state is generated according to the adjacent particle list data; thread allocation is performed on each particle in the initialized variable array; the initialized variable array is calculated according to the thread allocation result to obtain state parameters; and state updating is performed on all particles in the initialized variable array according to the state parameters; the scheme reads simulation parameters, initializes a particle swarm, performs neighborhood searching on the particle support domain radius, combines a GPU state, uses a 'one particle one thread' parallel architecture, updates a particle array, realizes multi-time step simulation, considers generalization and expansion, and supports multi-field engineering simulation.

The invention relates to an optical fiber type quantum dot temperature detection probe and a manufacturing method thereof, the optical fiber type quantum dot temperature detection probe comprises an optical fiber end face, an end face hydrophilic layer is arranged on the optical fiber end face, a quantum dot close-packed single-layer array is prepared on the end face hydrophilic layer, and a dielectric nano spherical particle single-layer array is prepared on the quantum dot close-packed single-layer array. A polymer packaging layer is arranged on the outer side of the quantum dot dense-arrangement single-layer array and the outer side of the dielectric nano spherical particle single-layer array, the quantum dot dense-arrangement single-layer array is a fluorescence signal generation layer, and the dielectric nano spherical particle single-layer array is a scattering enhancement layer; the optical fiber type quantum dot temperature detection probe is respectively connected with a laser and a spectrograph through branched optical fibers, and the spectrograph is connected with a computer to form a temperature detection device; a fluorescence spectrum emitted after the quantum dots are excited is scattered and enhanced by the dielectric nano spherical particle array and then is transmitted to a spectrograph, and a spectral signal is processed by a computer to obtain the local temperature of the end face of the optical fiber; the fluorescence signal intensity and consistency of the quantum dots are improved, and high-sensitivity detection of the environment temperature is achieved.

The application belongs to the technical field of functional materials, and particularly relates to a carbon-based microwave absorption material with a yolk-eggshell structure as well as a preparation method and application thereof. The carbon-based microwave absorption material is a carbon layer-coated cobalt-nickel alloy hexadecahedron array nanocage composite material assembled by a magnetic particle array, that is, the inner core layer is cobalt-nickel alloy particles, and the outer shell layer is a carbon layer. The carbon nanocage composite material exhibits excellent electromagnetic wave loss capacity in a frequency range of 2.0-18.0 GHz. The application uses glycolate as a template, coats polydopamine on the surface of the template, and releases magnetic particles in the interior. By changing the calcination temperature, the carbon-based material with a yolk-eggshell structure and a hexadecahedron nanocage structure and with magnetic and electric adjustable properties can be prepared. The application has a simple synthesis process, excellent material performance, and a wide application prospect in the fields of microwave absorption and catalysis.

This invention relates to the field of biochemical detection elements, and discloses a biochemical detection chip and its fabrication method. The biochemical detection chip includes a substrate layer and a particle array disposed on the substrate layer. The particle array is composed of multiple metal nanoparticles arranged according to a preset arrangement rule. The multiple metal nanoparticles have the same shape, and the diameter and height of each metal nanoparticle are both preset lengths and preset heights. Thus, the obtained biochemical detection chip has the advantages of high detection sensitivity, small size, and easy integration.

The invention provides a stretchable strain sensor and a preparation method and application thereof. The stretchable strain sensor comprises a stretchable substrate, micron particles embedded in the stretchable substrate and a conductive functional layer covering the surfaces of the micron particles and the stretchable substrate. Electrodes are arranged at two opposite ends of the conductive functional layer; and the micron particles are distributed in an array mode. Compared with a conventional sensor capable of randomly generating cracks, the stretchable strain sensor provided by the invention has the advantages that the periodic micron particle array is constructed on the surface of the stretchable substrate, and when the sensor is stretched, the regional strain between adjacent micron particles is amplified, so that a conductive layer near the particles is induced to generate controllable micro cracks, and the tensile strain sensor is used for detecting the micro cracks. The controllable microcrack structure can significantly improve the sensitivity and stability of the sensor; meanwhile, the preparation method combines the technologies of laser engraving, template transferring, spraying and the like, and is clear in technological process, high in controllability, simple in preparation and suitable for industrial production.