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31results about How to "Improve programming accuracy" patented technology

Projectile nutation angle extraction method based on radar Doppler data

The invention relates to a projectile nutation angle extraction method based on radar Doppler data. The method is characterized by comprising the following specific steps of arranging a radar tail chasing distributed station at the side rear part of an artillery or a rocket artillery, carrying out tracking measurement on a flying artillery shell or a rocket artillery shell, and estimating the radial velocity of a centroid; calculating micro motion speeds; extracting a precession period; resolving a velocity vector; calculating the nutation angle of a projectile. According to the method, the difficult problem in nutation angle measurement of the flying projectile under the conditions of long distance is solved effectively, and the motion of the rotating projectile in the air includes micro motions relative to the centroid, such as precession and nutation, besides centroid motion; radar signals are subjected to periodic modulation, namely micro-Doppler effect, by the micro motions. Internal data of the radial velocity obtained through radar measurement contain information on the micro motions, such as nutation, a nutation angle curve of the projectile can be obtained through processing the internal data, and the nutation angle of the projectile is obtained through an established micro-motion velocity equation.
Owner:冷雪冰

Multivalue memristor self-adaption programming circuit for nano cross rod structure and method

The invention discloses a multivalue memristor self-adaption programming circuit for a nano cross rod structure and a method, and aims to solve a problem of precision of memristor multivalue programming and improve the efficiency of programming. The programming circuit is composed of a nano cross rod and N feedback control units; the nano cross rod comprises M horizontal nanowires, N vertical nanowires and M*N memristors; and each feedback control unit is connected with a longitudinal nanowire of the nano cross rod. The programming method comprises steps of: first conducting an erase operation on a row of memristors to be programmed; initializing resistance of the row of memristors to a high value; conducting a programming operation on the row of memristors to be programmed; each feedback control unit receiving a reference voltage signal through a reference voltage input terminal and programming the resistance values of the row of memristors to be programmed to a respective target resistance value. The resistance value of the multivalue memristor provided by the invention can be programmed and modified in a range of variation according to requirements, and the programming circuit has high precision and high efficiency of programming.
Owner:NAT UNIV OF DEFENSE TECH

Programming method for multi-bit nonvolatile memory cell and multi-bit nonvolatile memory unit array

InactiveCN103165188AEliminate repeated verification processImprove programming speedRead-only memoriesPulse parameterPulse voltage
The invention provides a programming method for a multi-bit nonvolatile memory cell. The programming method comprises the steps of applying identical positive bias voltages on a substrate and a source terminal of a p-channel non-volatile memory cell, with a drain terminal grounded, applying a programming pulse voltage on a grid electrode; and programming the multi-bit nonvolatile memory cell in a setting state after a plurality of programming cycles comprising an electronic FN tunneling process and a channel hot electron injection process. Accordingly, the invention provides a programming method for a multi-bit nonvolatile memory unit array. A process for forming a memory cell threshold voltage steady state of the programming method provided by the invention is a self-convergence process and a repeated inspection process of a conventional programming method is omitted, so that programming speed of the multi-bit nonvolatile memory is effectively increased. By setting pulse parameters for the FN tunneling process and the channel hot electron injection process, the memory cell can be directly programmed to a designated state, so that programming accuracy of the multi-bit non-volatile memory cell is increased, and programming speed and accuracy can be taken into account at the same time.
Owner:INST OF MICROELECTRONICS CHINESE ACAD OF SCI

Extraction method of projectile nutation angle based on radar Doppler data

The invention relates to a projectile nutation angle extraction method based on radar Doppler data. The method is characterized by comprising the following specific steps of arranging a radar tail chasing distributed station at the side rear part of an artillery or a rocket artillery, carrying out tracking measurement on a flying artillery shell or a rocket artillery shell, and estimating the radial velocity of a centroid; calculating micro motion speeds; extracting a precession period; resolving a velocity vector; calculating the nutation angle of a projectile. According to the method, the difficult problem in nutation angle measurement of the flying projectile under the conditions of long distance is solved effectively, and the motion of the rotating projectile in the air includes micro motions relative to the centroid, such as precession and nutation, besides centroid motion; radar signals are subjected to periodic modulation, namely micro-Doppler effect, by the micro motions. Internal data of the radial velocity obtained through radar measurement contain information on the micro motions, such as nutation, a nutation angle curve of the projectile can be obtained through processing the internal data, and the nutation angle of the projectile is obtained through an established micro-motion velocity equation.
Owner:冷雪冰

Burning device for chip processing

The invention discloses a burning device for chip processing, and belongs to the field of chip burning. The burning device for chip processing comprises a box body, a partition plate is arranged in the box body, a driving part is arranged at the top of the partition plate, a screw rod is connected to the output end of the driving part, burning assemblies are arranged below the partition plate, threaded sleeves are fixedly connected to the tops of the burning assemblies, and the threaded sleeves are in threaded connection with the screw rod; burning needles are arranged at the output ends of the burning assemblies, the burning needles are connected with the bottom wall of the box body in a sliding mode, and the multiple sets of burning assemblies are distributed in the box body at equal intervals; wherein the burning needles are connected with a pressing mechanism used for fixing a chip, the pressing mechanism comprises a fixing plate, a connecting rod and a cylinder body, the fixing plate is fixedly connected to the burning needles, the connecting rod is fixedly connected to the fixing plate, the positions of the connecting rod and the cylinder body can be changed, and an ash removal structure is arranged in the cylinder body; according to the invention, the groups of burning needles can be stretched out and drawn back, a chip is fixed when the burning needles are in contact with chip contacts, and a chip can be cleaned at the same time.
Owner:佛山普瑞威尔科技有限公司
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