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469results about How to "Increase margin" patented technology

Two bit non-volatile electrically erasable and programmable semiconductor memory cell utilizing asymmetrical charge trapping

A non-volatile electrically erasable programmable read only memory (EEPROM) capable of storing two bit of information having a nonconducting charge trapping dielectric, such as silicon nitride, sandwiched between two silicon dioxide layers acting as electrical insulators is disclosed. The invention includes a method of programming, reading and erasing the two bit EEPROM device. The nonconducting dielectric layer functions as an electrical charge trapping medium. A conducting gate layer is placed over the upper silicon dioxide layer. A left and a right bit are stored in physically different areas of the charge trapping layer, near left and right regions of the memory cell, respectively. Each bit of the memory device is programmed in the conventional manner, using hot electron programming, by applying programming voltages to the gate and to either the left or the right region while the other region is grounded. Hot electrons are accelerated sufficiently to be injected into the region of the trapping dielectric layer near where the programming voltages were applied to. The device, however, is read in the opposite direction from which it was written, meaning voltages are applied to the gate and to either the right or the left region while the other region is grounded. Two bits are able to be programmed and read due to a combination of relatively low gate voltages with reading in the reverse direction. This greatly reduces the potential across the trapped charge region. This permits much shorter programming times by amplifying the effect of the charge trapped in the localized trapping region associated with each of the bits. In addition, both bits of the memory cell can be individually erased by applying suitable erase voltages to the gate and either left or right regions so as to cause electrons to be removed from the corresponding charge trapping region of the nitride layer.
Owner:SAIFUN SEMICON

Mortar shell bullet mechanical trigger fuse with penetration time self-adaptive function

ActiveCN111879191AHas a fail-safe featureWith redundant firingImpact fuzesMuzzleInternal ballistics
The invention discloses a mortar shell bullet mechanical trigger fuse with a penetration time self-adaptive function. The mortar shell bullet mechanical trigger fuse comprises a body, a pneumatic insurance mechanism/trigger ignition mechanism, an inertia ignition mechanism, an explosive-proof mechanism, a recoil insurance mechanism, an anti-recovery mechanism of the recoil insurance mechanism, a delay arming mechanism, a setting mechanism, a detonating tube, a booster tube and a bottom screw. Two insurances of the fuse respectively depend on an inner ballistic environment and an outer ballistic environment during launching to be released, and the two insurances of an explosive-proof piece are both in an insurance state at a filling stage and before getting out of a gun muzzle, so that thesafety is good. A fault insurance characteristic is possessed, in case that the recoil insurance mechanism is accidentally relieved, the fuse can be automatically switched into a fault insurance state, and safety in a credible service processing environment is guaranteed; a booster tube adopts an energy-gathered charging structure, so that the detonating capacity is high; the fuse has the characteristics of redundant ignition and redundant fire insulation, is high in reliability, and can ensure the treatment safety of unexploded ammunition explosives; and the fuse is simple in structure, is easy to process and low in cost.
Owner:NANJING UNIV OF SCI & TECH

X-ray radiographic digital imaging detection method for power grid GIS (Geographic Information System) equipment

The invention relates to a power grid equipment detecting technology, in particular to an X-ray radiographic digital imaging detection method for power grid GIS (Geographic Information System) equipment. The detection method comprises the following steps of: (1) fixing a part needing to be shot; (2) erecting an X-ray apparatus and placing an X-ray sensitization imaging plate; (3) connecting a cable between the X-ray apparatus and a console; (4) connecting a CR (Conditioned Reflex) digital image scanner and a computer by a special data line; (5) setting a shooting parameter of the X-ray apparatus according to the field condition; (6) starting a high-voltage emitting button of the console and carrying out radiographic shooting; (7) reading data to obtain a digital image picture; and (8) processing a shooting result by the computer. An X-ray radiographic digital imaging system of the GIS equipment directly reads data of an IP (Internet Protocol) imaging plate by adopting an advanced CR digital image scanning technology and converts the sensitizing image information on the IP imaging plate into a digital image signal; and compared with the traditional ray film needing a darkroom and the step of developing, the working efficiency is greatly improved.
Owner:ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID QINGHAI ELECTRIC POWER COMPANY

Vehicle-mounted positioning method based on multi-source information fusion

The invention discloses a vehicle-mounted positioning method based on multi-source information fusion, and the method comprises the following steps: 1, respectively obtaining the navigation information from each system; 2, carrying out the time-space registration of the navigation information from different systems; 3, carrying out the local filtering; 4, carrying out the information fusion; 5, outputting positioning information after information fusion, carrying out the reconfiguration of a main filter and a subfilter through an information distribution principle, and then returning to step 1. The invention innovatively provides the vehicle-mounted positioning method based on multi-source information fusion, and the method achieves the fusion of the position information provided by different positioning systems, improves the system redundancy, enables the positioning systems to complement each other's advantages, improves the dynamic adaptability of the systems, enables the total system to obtain the precision which is better than the precision of the local systems, improves the vehicle-mounted positioning capability, and enables a land-based weapon launching system to have the long-time and large-range maneuvering capability.
Owner:BEIJING INST OF SPACE LAUNCH TECH +1

Shape memory alloy (SMA) group rolling rod type large load releasing mechanism

The invention provides a shape memory alloy (SMA) group rolling rod type large load releasing mechanism. A segmented nut of the mechanism is firmly hooped by a hooping cylinder through rolling rods, simultaneously the upper end face and the lower end face of the segmented nut are respectively matched with an end cover and a separating ejector block, so that the segmented nut is a total nut and cannot move vertically. Groove are arranged on the segmented nut, so that when separation is needed, and the hooping cylinder moves downwards to drive the rolling rods to roll downwards and properly enter the grooves of the segmented nut when moving to a certain position, so that the segmented nut can obtain radial displacement. When releasing is finished, the hooping cylinder moves upwards under the effect of an SMA reset spring and simultaneously push the rolling rods out from the grooves, and the segmented nut draws close toward the inside to form an integral thread, so that repeated using function of the mechanism can be achieved, the segmented nut is fit with the separating ejector block through a conical surface, and the separating ejector block is matched with the hooping cylinder through two end faces. The shape memory alloy (SMA) group rolling rod type large load releasing mechanism is strong in shock resistance, releases large load and has the redundancy design and high reliability.
Owner:BEIHANG UNIV +1

Industrial control system communication network anomaly classification method based on statistical learning and deep learning

The invention discloses an industrial control system (ICS) communication network anomaly classification method based on statistical learning and deep learning. According to the invention, the method comprises the steps: designing LSTM deep learning structure parameters on the basis of the flow of a large-data-volume industrial control system communication network during normal operation, and performing modeling analysis; designing a correlation algorithm to analyze a numerical relationship between background traffic and real-time traffic by analyzing a real-time communication traffic data threshold generated based on a SARIMA online statistical learning model in the early stage; and carrying out specific classification on the ICS communication network anomaly according to an ICS network anomaly event classification algorithm. According to the invention, experimental analysis is carried out by using a target range test board combining industrial control safety virtuality and reality inZhejiang Province; meanwhile, a physical simulation platform is built in a laboratory environment to carry out a verification experiment, and detailed examples are given to verify the reliability andaccuracy of the algorithm.
Owner:ZHEJIANG UNIV

Non-fire-worker-driven two-stage compressing releasing mechanism

The invention provides a non-fire-worker-driven two-stage compressing releasing mechanism. Pretightening force applied to the mechanism can be accurately measured by means of strain gages; in the compressing state, a separating cap is limited by upper balls; a releasing pin is clamped by lower balls; the positions of the upper balls are determined by the separating cap, an upper retainer and the releasing pin; the positions of the lower balls are determined by the releasing pin, a sliding block and a lower retainer; and the sliding block is compressed by an anti-impact spring. During releasing, a non-fire-worker-driven element is powered on to start working to drive the sliding block to upwards move, after the sliding block upwards moves by a certain distance, the lower balls enter a groove of the sliding block, the releasing pin is unclamped and moves downwards under the effect of a driving spring, then the upper balls are unrestrained and fall into a groove of the releasing pin, theseparating cap is separated, and thus releasing is completed. In this mechanism, a plurality of spherical pairs are adopted, the influence of moment transferring on the part cooperation relationship and the releasing reliability is avoided, and meanwhile the mounting accuracy requirement is reduced; and control is convenient, vibration resistance is high, the borne load is large, and reliability is high.
Owner:北京深空动力科技有限公司
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