7results about How to "Avoid security breaches" patented technology

The utility model relates to the technical field of flat coal machine, specifically disclose a kind of flat coal machine hopper positioner, comprising: flat coal machine main body, flat coal machine main body both sides are equipped with pitch frame, pitch frame is fixedly connected with mounting bracket, mounting bracket is fixedly connected with collision detection component, collision detection component detects the safety distance of flat coal machine and carriage, pitch frame other end is equipped with limiting component, limiting component is positioned to the stroke of flat coal machine main body up and down pitch, by setting collision detection component, real-time accurate monitoring hopper and carriage distance, trigger fast evasion collision risk after, by setting limiting component, strictly limit pitch overtravel, completely solve the security loophole of traditional manual operation, substantially reduce the accident rate of equipment collision damage, bottom contact etc., overall mutual cooperation adapts different carriage and coal quantity, and safety, adaptability and economy are considered, the protection performance and practicality of core component are prominent.

The invention discloses a system for short-circuit safety protection of an elevator shaft safety door. The system comprises a main control board, a first detection circuit, a second detection circuit and a protection device. The first detection circuit is electrically connected with the main control board, and the first detection circuit is used for detecting the on-off state of an elevator safety circuit comprising a first well safety door switch; the second detection circuit is electrically connected with the main control board, the second detection circuit is independent of the elevator safety loop, the second detection circuit comprises a second shaft safety door switch, and the second detection circuit is used for detecting the opening or closing state of a shaft safety door; the protection device is electrically connected with the main control board; the main control board is used for controlling the protection device to be started when the first detection circuit detects that the elevator safety circuit is in a connected state and the second detection circuit detects that the well safety door is in an open state. The safety of elevator operation can be remarkably improved, and the life safety of personnel is effectively guaranteed.

The application relates to the technical field of traffic control and discloses an intelligent road recognition system based on deep learning, wherein an image acquisition device acquires a road surface image sequence and inputs the road surface image sequence into a double-branch decoupling neural network of a roadside edge computing node; a structural feature extraction path extracts structural feature vectors of road boundaries and lane markings through a spatial attention mechanism; an abnormal feature extraction path extracts abnormal feature vectors of crack, pit and water accumulation areas through a frequency domain filtering convolution layer; the edge computing node compares the abnormal feature vectors with a preset road damage level mapping table to generate road damage state features; and a roadside traffic control signal machine determines a speed limit threshold according to the state features and generates a speed limit control signal. The application completes recognition and control locally at the roadside, eliminates delay caused by back-and-forth transmission between the roadside and the cloud, realizes instant synchronization of damage recognition and speed limit instructions, and separates structural and defect feature expressions through decoupling processing.

The invention discloses a valve mechanism in-place detection system for an open switch cabinet, and relates to the technical field of switch cabinet valves, the valve mechanism in-place detection system comprises a substrate, the bottom end of the substrate is connected with a mounting track, and the left and right sides of the substrate are both provided with guide rods; a valve mechanism is jointly arranged on the outer side of the upper contact and the outer side of the lower contact, a connecting rod is arranged on the rear side of the base plate, an encoder shaft is movably connected to the outer surface of the connecting rod, an encoder is connected to the other end of the encoder shaft, and a PLC control module is connected to the outer surface of the encoder through an electric wire. Hall sensors are arranged on the outer sides of the two guide rods, and magnetic marks are preset on the outer surfaces of the two guide rods. A series of structures are arranged, multi-sensor redundancy check is utilized, the false alarm rate is reduced, high precision and reliability are improved, the self-adaptive algorithm is compatible with different conditions, manual intervention is reduced, meanwhile, misoperation is effectively prevented through a real-time interlocking mechanism, and electric power safety specifications are met.

The invention discloses an intelligent calculation method and system for available power transmission capacity of a power transmission section in multiple operation modes. The method comprises the steps that S1, multiple sets of power grid operation mode data are selected, and multiple sets of power grid operation basic data are acquired; s2, defining transmission section parameters; s3, setting a section transmission power target value based on the previous transmission section transmission power value and the transmission section parameters; s4, searching a sending-end generator and a receiving-end generator, and adjusting the output of the generators until a section transmission power target value is reached; determining a corresponding power grid operation mode; s5, checking the determined operation mode of the power grid; s6, when the checking result is passed, returning to S3, and resetting the section transmission power target value; s7, when the checking result is not passed, determining the transmission power value of the previous transmission section as the limit transmission power; and S8, executing the steps S3 to S7 on the multiple sets of power grid operation basic data, and taking the transmission power value of the minimum power transmission section as the allowable power transmission capacity of the power transmission section in the multiple operation modes.

This application provides a method, apparatus, and device for managing instant messaging message keys based on RedisHBase hierarchical caching and blocking queues. The server generates message keys and performs hierarchical storage processing based on a remote dictionary service protocol and a distributed database protocol to implement hierarchical key storage including hot and cold layers. The server performs derivation operations based on the recipient's user identifier to generate a user-derived key, and uses the user-derived key to match the message key and performs double-layer encryption transmission processing to obtain a key-type message including the encrypted transmission key, which is then sent to the client. The client parses the transmission key from the received key-type message and performs priority scheduling and session-level blocking determination with the encrypted message to generate an undecrypted message blocking queue.

The invention belongs to the field of memory control, and provides a memory control method and a storage device.The method comprises the steps that in response to a write instruction, security sensitive data in a memory block area and metadata containing a version number and a write count value are updated and replayed; copying the updated data and metadata into version entry data, and writing the version entry data into a backup area; receiving a rollback instruction carrying a target version number and a newly written count value, and querying whether corresponding version entry data exists in the backup area; if yes, judging whether the new write count value is greater than or equal to the write count value in the hit version entry data and the current write count value of the replay protection memory block area; and if the judgment is passed, writing the security sensitive data in the hit version entry data back to the replay protection memory block area, and updating the current write count value into a new write count value. According to the method and the device, the controllable safe rollback of the data version can be realized on the premise of not destroying the security mechanism of the replay protection memory block area.