777results about How to "Solve protection problems" patented technology

A ground fault circuit interrupter against RCE suitable for various electrical instruments, equipments and systems fed by electrical power supply is characterized in that an erroneous reverse connection mechanism is included in its load end and the reset button comprises a reverse trip mechanism. When electric power is mistakenly connected to the load ends, the reset button will be always in trip situation and the socket on its upper lid will be kept free of electricity even the reset is attempted unless the error connection is corrected. As compared to prior art, the circuit interrupter of this invention has a simple mechanical trip structure which can effectively prevent equipment damage and personal hazard caused by reverse connection. Of course, it had successfully passed the 6 KV/3 KA electric surge test and is highly anti-moist and anticorrosive.

Embodiments of the present invention provide a method for protecting a service path, a controller, a device and a system. The method comprises: an end node of a protection path receives a routing instruction transmitted by an SDN controller, the routing instruction including activation types of the service path and the protection path, forward relationships of the service path in the end node, and forward relationships of the protection path in the end node; the end node of the protection path activates at least one forward relationship in the forward relationships of the service path in the end node and the forward relationships of the protection path in the end node according to the activation types of the service path and the protection path; the end node of the protection path updates at one forward relationship in the forward relationships of the service path in the end node and the forward relationships of the protection path in the end node if it is determined that a fault occurs in the service path. The embodiments of the present invention solve the problem that in the SDN technology, the service path cannot be protected by the protection path when a fault occurs in the service path. The embodiments of the present invention relate to the technical field of communication.

The invention provides a method for multimedia information sharing and belongs to the technical field of mobile communications. The method for the multimedia information sharing comprises the steps that a user' instruction for sharing multimedia information is received; private data in the multimedia information is detected; a shielding operation interface of the private data is displayed when the private data is detected, and the private data is shielded according to the user's operation on the shielding operation interface; and the multimedia information of which the private data is shielded can be shared. The invention also discloses a relevant mobile terminal. The method for the multimedia information sharing provided by the invention solves the problems in the prior art that efficiency of the multimedia information sharing is low, and the private data in the multimedia information cannot be protected comprehensively. Through automatic detection of the private data and provision of the rapid shielding interface, the efficiency for the multimedia information sharing is increased; and the method and the mobile terminal are applicable to different types of multimedia information and can comprehensively protect the private data in the multimedia information.

The invention discloses an Internet of vehicles malicious node detection system and method for an integrated block chain consensus mechanism. Messages sent by a vehicle sending node Vi and identity information of a vehicle sending node Vi are packaged into a request authentication data packet to be sent to RSU via any vehicle receiving node Vj; after receiving the data packet, the RSU performs mutual identity authentication with the Vj; if the mutual identity authentication is passed, the RSU forwards the received data packet sent by the Vj to a TA; according to the traceability of a databaserecorded by a block chain, digital signature and information authentication are performed by using a RSA algorithm; the consensus mechanism is used for detecting whether the vehicle node is a malicious node through combining with the current state of the vehicle node. According to the method, the characteristic that the data recorded by the block chain is not easy to tamper is used, the maliciousvehicle in the Internet of vehicles can be efficiently and accurately detected, meanwhile, the problems of decentralized management and privacy protection of the Internet of vehicles also can be solved, and thus the problem that in the Internet of vehicles, the detection accuracy of the malicious node is low is solved, and the network overhead is effectively reduced.

The invention provides an infrared metal reflecting film with high adhesive force and a manufacturing method thereof, wherein the infrared metal reflecting film with high adhesive force is plated on substrates of optical components such as glass, metal and silicon crystals. The infrared metal reflecting film with high adhesive force comprises a substrate, and is characterized in that a first transition layer, a holding-on bonding layer, a metal layer, a stress matching layer, a dielectric enhancement protecting layer and a hard wear-resistant layer are sequentially arranged on the substrate in an evaporation mode. The infrared metal reflecting film has the advantages of being good in film adhesive force, high in reflectivity, resistant to wear and high in environmental suitability, has a high laser damage resistance threshold value level, and can be widely applied to military and civilian photoelectron technical fields such as infrared lasers, refraction-reflection type optical systems and laser/infrared universal photoelectric equipment.

The invention discloses an AC-DC LED drive circuit with a high power factor, which comprises an AC input voltage circuit, a rectifying circuit, a switch converting circuit, a current sampling resistance circuit, an output adjusting switch pipe circuit, a power factor correcting controller circuit, a current control circuit I, a current control circuit II, and the like. The AC-DC LED drive circuitwith a high power factor is characterized by leading the AC-DC high-power factor correcting circuit to be capable of providing constant current and rapid current-limiting protection in a dynamic state (starting, input overvoltage, input mutation, LED load output overcurrent, LED load output short circuit, load mutation, and the like) needed by steady normal operation of an LED and can realize theinput soft starting and reduce the input impact current. The invention has the advantages that: 1. the problem of rapid control of output load current is solved when the high-power factor control is realized; 2. the overvoltage and short circuit protection of a boosting circuit can be realized; 3. the soft starting of a driver is convenient to realize, and the input impact current is inhibited.

The invention relates to an electronic document security ensuring system and an electronic document security ensuring method. The electronic document security ensuring system is based on a client server system, and performs user permission management by coordination of a client and a server, wherein the server comprises a document server module, a certificate management service module, a document log service module, a document distribution service module, and a user role and permission management service module; and the client comprises an electronic document editor module and a client configuration interface module. The electronic document security ensuring method comprises the following steps: 1) providing a unified security verification mode for different document formats of the client; 2) acquiring user operating information by operating information interception technology, and shielding corresponding unauthorized operation according to user permission; and 3) separating functions of document storage, role management, permission control and log management, and constructing an electronic document server end based on Web. The system and the method can prevent the information leakage in the form of electronic document and provide high security guarantee for electronic office.

The invention relates to a main transformer differential protection CT polarity check method of a pumped storage power station. In the invention, an applied power method is adopted to solve the problem that the main transformer differential, bus differential and high-voltage cable differential protection CT polarity cannot be checked during the inversed electrification of a main transformer before the machine set of the power station is started, thereby the safety and reliability of the system and the inversed electrification of the main transformer are ensured. The method has the advantages that the operation and the using condition are simple, the used test instrument equipment can be used repeatedly, the water debugging straight-line period of the machine set is not occupied, the temporary high-voltage cable investment is saved, and the commissioning cost is reduced; therefore, the method has favorable popularization and application prospect.

The invention discloses a double-feed wind power generator stator short circuit current calculating method under the condition of asymmetric faults. The method comprises the following steps: establishing a voltage equation and a flux linkage equation of a double-feed wind power generator, in the form of space vectors under a stator shaft system; establishing stator and rotor current expressions, and establishing a stator positive sequence flux linkage expression after the faults; establishing a rotor positive sequence flux linkage expression after the faults; establishing a stator positive sequence current expression of the double-feed wind power generator under the condition of an asymmetric fall of voltage at a machine end; establishing a stator negative sequence flux linkage expression after the asymmetric fall of the voltage at the machine end; establishing a rotor negative sequence flux linkage expression after the asymmetric fall of the voltage at the machine end; establishing a stator negative sequence current expression after the asymmetric fall of the voltage at the machine end; and finally obtaining a stator current expression after the asymmetric fall of the voltage at the machine end. According to the invention, the problems of affected relay protection and control accessed to a wind power field, affected safe and stable operation of a wind power generator set and the like, caused by lack of research on a simple and effective stator short-circuit current calculation method under the condition of the asymmetric faults in the prior art are solved.

The invention relates to a magnetic suspension device capable of automatically rotating, which comprises a bracket, an electromagnet, a suspension component, a displacement sensor, a rotating action coil, and a control circuit, wherein the electromagnet is arranged in the bracket; a suspension permanent magnet and a rotating permanent magnet are arranged in the suspension component; the suspension component can be magnetically suspended under the electromagnet and can automatically rotate along two directions; the displacement sensor is arranged in the bracket; the rotating action coil is arranged in the bracket and is used for detecting the rotation of the suspension component and driving the suspension component to rotate; the control circuit is arranged in the bracket; and the electromagnet, the displacement sensor and the rotating action coil are all connected to the control circuit. The suspension component of the device can stably suspend in air and can automatically rotate along two directions, the suspension component is under the power-off protection, and the control structure is simple. The device has the advantages of low power consumption, less emitted heat, and longerservice life. The device provided by the invention can be used as handiwork, showing stand, and the like.

The invention provides a method for restoring a slash type degraded wetland. The degraded wetland is restored by adopting one or more of a hydrological connection method, a microrelief transformation method, a matrix recovery method, a vegetation recovery method and a riparian zone slope protection method. According to the specific circumstance of the degraded wetland, the method can comprehensively utilize the whole technical system, and also can separately utilize certain technology. The method improves the landform, a water system, a wetland matrix and the riparian zone environment of the degraded wetland through ecological engineering measures so as to reasonably arrange wetland vegetation from land to open water, construct an optimal wetland vegetation community structure, and effectively improve the stability and the self-maintenance of the degraded wetland.

The invention discloses an under-forest original ecology gastrodia elata planting method. The method includes the steps that a field of which one half backs to the sun and the other half faces the sun and a piece of shady mountainous forest land are selected for planting, wherein the altitude of the field and the altitude of land range from 1000m to 2000m; fungus-growing materials are prepared, specifically, tree sticks are cut in November to February and are then cut into short wood sections with the lengths ranging from 18cm to 20cm, the prepared tree sticks are placed along slopes, every 6-8 tree sticks is subject to a bottle of halimasch with the volume of 750ml, and homozygous zero-generation seeds and homozygous one-generation seeds are sown for planting, wherein the homozygous zero-generation seeds and the homozygous one-generation seeds are cultivated by carrying out artificial pollination on wild gastrodia. According to the method, the natural environment can be fully used, natural shading is achieved, and accordingly produced commodities can reach the quality standard of purely natural, pollution-free, environment-friendly, organic and authentic traditional Chinese medicinal materials due to abundant compost soil, leaves, sloped places and beneficial bacteria under a forest.

The present invention discloses an image watermark embedding method, an image watermark extraction method, a digital media copyright protection method and a digital media copyright tracing method. The image watermark embedding method comprises: converting a watermark into a watermark binary sequence as required; carrying out a key-based spread spectrum operation on the watermark binary sequence, so as to determine a spread spectrum watermark vector; carrying out adaptive segmentation on a to-be-watermarked image; based on the adaptive segmentation, carrying out multistage discrete cosine transform on the to-be-watermarked image, so as to determine a first transform coefficient matrix; based on the first transform coefficient matrix, constructing a feature vector, and embedding the spread spectrum watermark vector into the feature vector; and carrying out coefficient reset, inverse discrete cosine transform of the coefficient matrix, and the like on the feature vector embedded with the spread spectrum watermark vector, so as to determine the watermarked image. According to the methods disclosed by the embodiments of the present invention, invisibility, robustness and security of the watermark are improved, and risk that the watermark is recognized and erased maliciously is weakened.

The invention relates to a timing control circuit of a pulse power supply. The timing control circuit comprises a DC/DC (Direct Current) converter 1, a DC/DC converter 2, a power-on detection circuit, a delay circuit, a power-down detection circuit, switching current and a drive circuit. The power-on timing problems of GaAs devices and the like are solved by fewer components. The power-down timing circuit solves the damage problems of the GaAs devices and the like caused by timing abnormity due to output power-down. The power-down timing circuit is combined with the delay circuit, so that the output overcurrent or short-circuit protection problems of positive voltage are simultaneously solved. The timing control circuit provided by the invention can be widely applied to electronic circuits which need to meet positive and negative power supply timing in the fields of communications, radar, aviation, electronic countermeasure and the like.

The invention discloses a method for preparing anion far-infrared short fibers employing waste renewable polyester bottle flakes. The method comprises the following steps: pretreating and drying the recycled waste renewable polyester bottle flakes; carrying out drying treatment on far-infrared masterbatch and anion masterbatch; feeding the dried polyester bottle flakes, the far-infrared masterbatch and the anion masterbatch to a special metering feeder for mixing, so as to obtain a mixture; carrying out melted extrusion on the mixed mixture by a screw to obtain a melt; filtering the melt, metering and spinning, cooling by cross blowing, winding and oiling, feeding by traction, filling fibers and doffing; carrying out bundling treatment on the fibers inside a barrel, and carrying out the procedures such as drafting, oiling, fiber folding, curling, thermoforming, cutting off and the like by oil bath, so as to obtain the anion far-infrared short fibers. The method disclosed by the invention is reasonable in preparation technology, and strong in maneuverability. The product prepared by the method disclosed by the invention is lower in selling price than the product prepared from native polyester. Therefore, the method has good economic benefits and social benefits.

The invention relates to a method for producing catalytic reformed feedstock by taking light and medium gasoline distillates as raw materials and extracting selective solvent to extract and rectify catalytically cracked gasoline in the absence of hydrogen. The method comprises the following steps: 1, fractionation prefabrication of light and medium distillate raw materials of catalytically cracked gasoline; and 2, extraction, rectification, desulfuration and dearomatization of light and medium distillates of catalytically cracked gasoline, wherein light and medium distillates of catalyticallycracked gasoline obtained in step 1 are fed into the middle-lower part of an extraction-rectification tower, while fresh extraction agent or recycled extraction agent is added from the upper part of the extraction-rectification tower; thus, the light and medium distillates contact the extraction agent inside the tower to generate desulfurized and dearomatized light-component raffinate phase (i.e.catalytic reformed feedstock product) rich in olefin hydrocarbon at the top of the tower after extraction, rectification, desulfuration and dearomatization. The method carries out desulfuration and dearomatization of catalytically cracked gasoline at the same time and reclaims solvent, thereby having the advantages of simple process, moderate operation conditions, hydrogen source saving and low production cost.

The invention discloses a magnetic suspension energy storage flywheel charging and discharging control method based on minimum power topology, and is used for finishing the high-efficient magnetic suspension energy storage flywheel charging and discharging control to realize the energy conversion of electric energy-kinetic energy-electric energy. The power topology comprises a DSP (Digital Signal Processor) control unit, a power driving and protecting circuit, a bypass relay, a soft boot resistor, an equalizing resistor, a voltage stabilization capacitor, an IGBT (Insulated Gate Bipolar Translator) switching tube, a Hall current sensor, a permanent magnet synchronous motor, a flywheel and a direct-current load, wherein the IGBT switching tube is under a high-frequency inversion state when direct-current bus voltage Udc is higher than charging voltage, a permanent magnet synchronous motor drives the flywheel to be accelerated, and the flywheel is under a charging mode to finish the conversion of the electric energy to kinetic energy; when the direct-current bus voltage Udc is lower than discharging voltage, the IGBT switching tube is under a PWM (Pulse-Width Modulation) rectification state, the revolving speed of the flywheel is lowered, and the permanent magnet synchronous motor is under a discharging mode to finish the conversion of the kinetic energy to the electric energy. The magnetic suspension energy storage flywheel charging and discharging control method is used for the high-efficient magnetic suspension energy storage flywheel charging and discharging control.

The invention discloses a congestion control method based on a wireless multimedia sensor network, which is a speed regulation mechanism based on dynamic priority level and is mainly used for solving the Qos (Quality of Service) protection problem of different application streams in the case of congestion of the wireless sensor network based on multimedia. Based on priority level, the speed regulation disclosed by the invention effectively avoids the important flow rate with high priority level in the network from being effected by congestion and dynamically changes the protection strength of the important application stream; and by means of considering the characteristics of the multimedia sensor network, the high efficiency of the network can be maintained by important limit on the far-end flow rate of the network in the case of severe congestion. The method utilizes the speed regulation mechanism based on the dynamic priority level to distinguish the importance of different applications, limit the congestion effect within a common application range as much as possible, protect the QoS of applications with high priority levels and realize the high efficiency of the multimedia sensor network.

The invention provides a cascaded converter and a protection method thereof. A discharge loop and a bypass circuit are added into the converter, and simultaneously, an active voltage equalizing method or an overvoltage protection method is used for monitoring the converter to ensure that the direct-current bus voltage of each transformer in the cascaded converter is in a balanced state, or the overvoltage protection is performed when the voltage is overhigh. In the invention, the active voltage equalizing method obtains a good effect through tests. In the invention, the overvoltage protection method and the active voltage equalizing control method adopt the same circuit, a fast protection method is provided, a good protection effect can be obtained, the failure-free operation time of a system is prolonged, and a foundation is provided for the application of the cascaded converter. The invention has important significance for the application of cascaded converters in the future.

The invention provides a text image watermark embedding method and system, and a text image watermark extraction method and system, and the text image watermark embedding method comprises the steps: carrying out the secondary encryption of an input watermark, and obtaining a watermark to be embedded through error correction coding; performing secondary discrete wavelet transform on the text imageto obtain four first frequency band coefficient matrixes; performing block discrete cosine transform on the first frequency band coefficient matrix to obtain a corresponding first block coefficient matrix; for each first block coefficient matrix, selecting an intermediate frequency coefficient, and embedding a watermark by modifying the coefficient to obtain each first block coefficient matrix embedded with the watermark; and performing inverse discrete cosine transform and inverse discrete wavelet transform on each first block coefficient matrix embedded with the watermark to obtain a text image embedded with the watermark. According to the embodiment of the invention, on the premise that the invisibility of the watermark is ensured, the robustness of the watermark for resisting attacks such as compression, noise and shearing and the algorithm security are improved.

The invention discloses an outsourcing data deduplication cloud storage method supporting privacy and integrity protection. Firstly, client deduplication and security authentication label deduplication of a data file are realized, so that the communication overhead and the storage burden of a cloud server are greatly reduced; and secondly, by adopting the extractor technology, the ciphertext of the outsourcing storage data does not depend on an encipher and an encryption algorithm, but depends on the data, so that ciphertext data deduplication is realized, and the privacy of the data is ensured in the deduplication process and the integrity auditing process. And finally, the RS erasure code technology is adopted to improve the fault-tolerant capability of deduplication cloud storage; a cloud service provider is also supported to spontaneously and regularly delegate a third-party auditor to carry out batch public cloud auditing on the data stored in the cloud server so as to ensure theintegrity of the data; meanwhile, a data owner is also supported to initiate public cloud auditing on the integrity of the file anytime and anywhere, so that the privacy of the data can be always protected in auditing and deduplication processes. The method provided by the invention is effective in the aspect of deduplication and efficient in the aspect of integrity cloud auditing.

The invention belongs to the field of energy storage, and discloses a mixed gas separation, mass storage, pressure rise and energy storage device and a method and a utility system, and a heat exchange pressure equalizer. The separation of mixed gas, the pressure rise, the energy storage, the heat exchange and the conversion of gas and liquid are finished in one device, so that the equipment is simplified, the efficiency is improved, and the heat energy is reduced; the cold energy is lost; the energy storage and the energy release can be separately or synchronously performed, so that the emission of carbon dioxide is reduced; and a nitrogen oxide, a sulfur oxide, heavy metal [pm 2.5] and the like are collected for storage and utilization to change harmful substances to useful substances. The invention discloses a gas (air and smoke) condensation, separation and energy storage power station, a wind-electricity plant air separation and energy storage power station, a photovoltaic power generation plant air separation and energy storage power station, a solar heat power air energy storage power station, a wind-electricity solar heat power complementary air energy storage power station, a nuclear power air separation and energy storage power station, a ire coal combustion biomass power generation plane smoke separation and energy storage power station, a gas power generation smoke separation and energy storage power station and an industrial kiln smoke separation and energy storage power station.