338results about How to "Fix security issues" patented technology

The invention provides a distributed power data asset management privacy protection encryption architecture design method, which comprises the steps of generating a watermark with robustness and imperceptibility by adopting a content-based digital watermarking algorithm according to statistical characteristics of power data assets, and storing a watermark embedding process and an extraction result through a blockchain; a graph-based data model is adopted, the electric power data assets carrying the watermarks serve as nodes, the data flow relation serves as edges, and an electric power data asset consanguinity graph is constructed; for distributed storage of the blood relationship map, a P2P network topology is constructed by adopting a block chain and a distributed hash table, and blood relationship map data is stored in each node of an alliance chain in a distributed manner; and verifying the digital watermark information embedded in all circulation path nodes through which the power data assets pass in the blood relationship map, calculating the similarity between the extracted watermark and the original watermark, calculating the distortion rate, and judging whether the power data assets are tampered or not.

The invention discloses a network security active defense method and system for detecting abnormal network behaviors. The method comprises the following steps: S1, constructing a virtualized isolation network environment through a software defined network technology; s2, deploying intelligent dynamic camouflage nodes in the virtualized isolation environment; s3, acquiring a disguised node attack behavior, and identifying a network abnormal behavior through a deep learning technology; s4, extracting network abnormal behavior features, and identifying potential threats through a deep learning technology; s5, a defense mechanism is automatically triggered, a honeynet is started, and abnormal behaviors and potential threats are isolated; and S6, tracing an attack path, and carrying out source positioning. The network security active defense system comprises a network construction module, a deployment module, an identification module, a honeynet, an isolation module and a tracing module. The disguised nodes are deployed through the deployment module to detect abnormal network behaviors, active defense of network security is realized through the honeynet, the isolation module and the tracing module, and the network security is improved.

The invention relates to the technical field of network security, and discloses a network information security encryption method, which comprises the following steps: step 1, a sender generates a pair of post-quantum asymmetric keys including a public key and a private key, the public key is used for encrypting a symmetric key, and the private key is used for decrypting the encrypted symmetric key; the sender sends the public key to the receiver through the secure channel, and verifies the authenticity of the public key of the receiver; and step 2, the sender generates a dynamic symmetric key based on a device identifier and a current timestamp, and the device identifier is used for uniquely identifying the device generating the key. A unique and unpredictable dynamic symmetric key is generated by combining a device identifier and a timestamp, the security problem that a traditional static key is easy to crack and abuse in long-term use is solved, in addition, a dynamic update triggering mechanism based on a time interval and a data volume is supported, key management has high flexibility and security, and the security of the key management is improved. And the encryption requirements in different network environments are met.

The invention belongs to the technical field of positioning and navigation, and particularly relates to a line inspection method and system for unmanned aerial vehicle airborne power grid X-ray detection equipment. According to the method, a positioning unmanned aerial vehicle is used for determining a hovering point of a transportation unmanned aerial vehicle on a power transmission line, after the hovering point is sent to a positioning navigation unit, the positioning navigation unit carries out coordinate system unification and flight path planning, and the transportation unmanned aerial vehicle receives a flight instruction sent by the positioning navigation unit; carrying the power grid X-ray detection equipment to fly to a hovering point according to the path planning of the positioning navigation unit; and releasing the power grid X-ray detection equipment, analyzing the acquired X-ray image by the power grid X-ray detection equipment, and transporting the unmanned aerial vehicle recovery equipment after the acquisition task is completed. According to the invention, the difficulty in releasing and recovering the power grid X-ray detection equipment can be reduced, and the detection efficiency is improved.

The invention discloses a wind power master control system based on a safe and credible software and hardware platform, which belongs to the technical field of wind power generation and comprises a data acquisition module, a data analysis module, a monitoring result judgment module, an abnormal unit optimization control module and a data backup module. According to the invention, the data acquisition module acquires the operation monitoring parameters of the wind turbine generator in real time, and the operation monitoring parameters are processed by the data analysis module to obtain the operation monitoring evaluation value, so that the operation state of the wind turbine generator is accurately judged, and accurate monitoring and timely early warning of the wind turbine generator are realized; the problem that in the prior art, a wind power master control system is insufficient in safety performance and reliability is effectively solved, and the safe operation level and the fault handling capacity of a wind power plant are improved.

The invention relates to the technical field of information security, in particular to a database tamper-proofing method and system based on a trusted computing environment, and the method comprises the steps: S1, receiving data transmitted into the database by adopting a security protocol communication TLS, carrying out the preliminary verification and cleaning of the data, generating a verification key through a trusted computing module TPM, and storing the verification key in a secure storage area of the trusted computing module; s2, loading the verified data into a feasible computing environment TEE to generate an encryption key, and storing the encryption key in an internal storage area of the feasible computing environment TEE; s3, performing integrity verification on the encrypted data in the feasible computing environment TEE; and S4, leaving the checked data from the feasible computing environment TEE through the security protocol communication TLS, and transmitting the checked data to a tamper-proof database for storage. The data processing and storage operation is executed in the trusted computing environment, the integrity and non-tampering property of the operation record are ensured by using the tampering-proof database, and the credibility and safety of the whole data processing and storage system are improved in a combined mode.

The invention provides a turnable helicopter air inlet channel structure, and belongs to the technical field of helicopter structural design, the structure comprises a front support frame, a rear support frame, a left fixed cover, a right fixed cover, a movable cover, a lower air inlet channel, an air inlet channel support assembly and an air inlet net assembly, the air inlet channel is divided into an upper part and a lower part, wherein the upper air inlet channel is integrated on the movable cover, the upper section and the lower section are pressed and sealed through the P-type sealing ring, the air inlet net assembly is connected to the movable cover in a screwed mode, and the left side of the movable cover is connected with the left fixed cover; the right side of the movable cover is connected with the right fixed cover through a front hinge assembly and a rear hinge assembly. The front and the back of the movable cover are connected with the front support frame and the back support frame; the interior of the front side of the movable cover is connected with the front supporting frame; the air inlet channel supporting assembly, the lower air inlet channel, the front supporting frame, the rear supporting frame, the left fixing cover and the right fixing cover are riveted to form a stable frame structure. The device is simple in structure, convenient to mount and maintain, reasonable in stress form, safe, reliable and capable of solving the problems of maintainability and safety of the rear cabin engine of the power cabin.

The invention discloses a multi-core system on chip and a control method thereof. The method relates to the technical field of chip design, and comprises the following steps: determining a first CPU core for executing a current task from a plurality of CPU cores of a multi-core system on chip; and controlling the first CPU core to execute a current task, and controlling other CPU cores except the first CPU core in the plurality of CPU cores to be in a dormant state. The technical problem that the multi-core system on chip is poor in safety or large in power consumption due to the fact that the multi-core system on chip only supports all the CPU cores to execute the same task or all the CPU cores execute different tasks respectively in the prior art is solved.

A smart screen movement control method, a mobile smart screen, a medium and a product relate to the technical field of mobile smart screen control, and the method comprises the steps of determining a target position for moving and a movement path for moving to the target position based on a target setting instruction of a user terminal; moving according to the moving path, and determining the residual electric quantity; when it is determined that the standby point position with the residual electric quantity lower than the preset safe electric quantity exists, the equipment position of the standby smart screen is obtained; determining a target point location for handover between the mobile smart screen and the standby smart screen, and sending a handover instruction to the standby smart screen; a task transfer instruction is sent to the standby smart screen, so that the standby smart screen displays screen display information of the mobile smart screen and goes to the target position based on the moving path; and moving to an equipment position for charging. By implementing the method, the endurance of the mobile smart screen can be optimized, work interruption is avoided, and the user experience is optimized.

The invention discloses a vehicle voice interaction method and system and a storage medium, and the method comprises the steps: obtaining a voice instruction sent by a user, extracting voiceprint information and semantics according to the voice instruction, and obtaining a current user position based on the voice instruction; the user permission level is recognized according to the voiceprint information, the semantics and the user position, the voiceprint information is used for verifying the voiceprint permission, the semantics is used for verifying the wake-up permission, the user position is used for verifying the priority permission, and when the voiceprint information passes the verification of the voiceprint permission, verification of the wake-up permission is executed. After the semantics pass the verification of the wake-up permission, executing priority permission verification, and outputting the user permission level; and generating a control instruction based on the user permission level, wherein the control instruction is used for controlling the vehicle machine to execute an operation corresponding to the user permission level.

The invention discloses a multi-mode redundant model-free longitudinal control method for an automatic driving vehicle. The method comprises the following steps: collecting a longitudinal control signal source; establishing an off-line driving torque database and an off-line braking pressure database; designing a model-free vehicle speed control strategy, and calculating a vehicle speed expected driving torque and a vehicle speed expected braking pressure; designing a model-free acceleration control strategy, and calculating an expected acceleration driving torque; a model-free deceleration control strategy is designed, and deceleration expected brake pressure is calculated; and according to the vehicle speed expected driving torque, the vehicle speed expected braking pressure, the acceleration expected driving torque and the deceleration expected braking pressure, a model-free longitudinal control mode arbitration strategy is designed, the request driving torque and the request braking pressure are output, and longitudinal operation is achieved. According to the method, the stability problem of longitudinal control of the automatic driving vehicle can be solved under the condition that vehicle model parameters are missing or the model parameters are uncertain, and unexpected driving or braking caused by interference of factors such as program abnormity and communication congestion is prevented.

The invention discloses an airborne multi-source integrity monitoring method and device for an aviation navigation operation network, and belongs to the field of satellite navigation, and the method comprises the steps: constructing an overall design architecture of an airborne multi-source high-performance navigation receiver; an ionosphere gradient monitoring algorithm based on carrier phase difference is provided, IGM detection statistical error characteristics of the carrier phase are researched, an ionosphere gradient monitoring threshold is established, and a switching mechanism from an airborne DFree mode to an IFree mode is realized; an aviation navigation multipath mitigation suppression algorithm is researched, multivariate feature extraction of observation data is combined, an observation data feature matrix is established, a parallel time convolutional neural network architecture is designed, and the weight is updated through a stochastic gradient descent method. According to the airborne multi-source integrity monitoring method and device for the aviation navigation operation network provided by the invention, accurate monitoring of the ionosphere gradient is realized, a switching mechanism between a DFree mode and an IFree mode is optimized, and the integrity monitoring capability and the system availability of the aviation navigation operation network are improved.

The invention discloses a frequency safety scheduling method considering standby mutual aid of an interconnected power grid, which comprises the following steps of: firstly, realizing coordination mutual aid of flexible standby resources and secondary frequency modulation standby resources among regions by delimiting a power imbalance risk operation boundary of the interconnected power grid and dividing an adjusting space of a connecting line; and establishing an active frequency safety day-ahead scheduling model of the interconnected power grid by taking the safe and economic operation cost of the interconnected power grid as a target, and realizing power balance and frequency safety cooperative scheduling of the interconnected power grid. The method can solve the problems of space-time mutual aid of peak and frequency modulation resources of the interconnected power grid and low frequency safety level, can give consideration to the safety and economical efficiency of system operation, effectively resists the risk of power imbalance of the power grid, has important significance and reference value for frequency safety scheduling research of the interconnected power grid, and has engineering application value.

The invention relates to the field of remote sensing image processing, and discloses a high-resolution remote sensing image semantic segmentation passive domain self-adaption method and device, and the method employs a prototype guiding consistency learning module of teacher and student knowledge distillation, optimizes pseudo label generation and quality through knowledge transmission, data enhancement and a prototype guiding mechanism, and improves the semantic segmentation precision of a high-resolution remote sensing image. Feature alignment of a source domain and a target domain is improved, and particularly, the segmentation effect is remarkably improved in small ground feature recognition; through a cross-domain feature enhancement module, the feature extraction capability of complex boundaries and small ground features is enhanced by using channel adaptive weight distribution, so that the segmentation precision of a target domain is improved; a passive domain adaptive strategy is adopted, under the condition that source domain data cannot be accessed, a target domain is optimized based on a pre-trained source domain model, the data privacy and safety problems are solved, and the generalization performance of cross-domain semantic segmentation is improved. According to the method, the condition that source domain data are unavailable is effectively handled, and the segmentation precision of the cross-domain difficult-to-classify region in the remote sensing image is remarkably improved.

The invention relates to unified data backup and disaster recovery equipment, in particular to the field of data security, and specifically comprises a data backup module, a disaster recovery module and a recovery verification module, the data backup module is used for carrying out data fragmentation on data needing to be backed up, then carrying out Hash processing on each data block by utilizing a Hash function, distributing each data fragment to a plurality of backup nodes, registering a Hash value of the data fragment on a block chain by the backup nodes, and storing the Hash value on the corresponding backup node; in the storage process, a smart contract is utilized to manage data backup operation according to a preset rule, and by utilizing the characteristics of decentralization and non-tampering provided by a block chain technology, security guarantee of data backup can be realized in backup and disaster recovery, the problems of security and consistency of traditional centralized backup are solved, and data backup efficiency is improved. And through a block chain technology, distributed storage of the data can be realized, and it is ensured that the data is not tampered in a backup process.

The invention discloses an automobile cabin software control method and system based on multi-mode interaction, and relates to the field of multi-mode data, and the method comprises the steps: S1, multi-source signal synchronous collection and timestamp calibration; a user voice instruction, a gesture track and eye fixation point information are collected in real time through a distributed sensor array; according to sensor data, a three-level synchronization architecture is combined with a PTP precise time protocol to achieve microsecond-level clock synchronization, a unified time service timestamp is embedded in a data packet header, and the timestamp error is controlled within + / -0.5 ms; s2, dynamic environment interference compensation; the method comprises the following steps: constructing an environmental noise perception model; the construction of the environmental noise perception model comprises the following steps: starting a regional strong light suppression algorithm for a strong light scene with the illumination intensity greater than 10,000 lux; activating a motion compensation module for a bumpy scene with a vertical acceleration greater than 0.3 g, and outputting an environment compensation multi-modal data stream; s3, analyzing time-space association semantics; and S4, confidence decision and instruction execution.

The invention discloses a charging control system and method for an electric vehicle. The system comprises a vehicle control unit, a PDU, a charging socket, a first pre-charging relay, a first charging positive relay and a first charging negative relay. The first charging positive relay is connected in series between the positive output end of the PDU and the positive terminal of the charging socket, the first charging negative relay is connected in series between the negative output end of the PDU and the negative terminal of the charging socket, and the first pre-charging relay and the first charging positive relay are arranged in parallel. When a charging socket and a charging plug are plugged for charging, after a power battery charging and discharging loop is connected, a vehicle control unit firstly controls a first pre-charging relay and a first charging negative relay to be closed so as to perform pre-charging through a PDU pre-charging loop; and when the voltage difference between the two ends of the first charging positive relay is smaller than a set value, the first charging positive relay is controlled to be closed, the first pre-charging relay is controlled to be disconnected, and a PDU main charging loop is formed. According to the invention, the compatibility and safety with the charging pile can be improved.

The invention relates to the field of machine position supporting systems of tower building machines, and discloses a machine position supporting system of a tower building machine for tower building, a plurality of fixing grooves for fixing supporting reinforcements are formed in the circumferential surface of a tower, one end of each supporting reinforcement is connected with a reinforcing layer, and the other end of each supporting reinforcement is fixed with a preformed insertion stress plate arranged on the surface of the corresponding fixing groove; during installation, the installation position of the supporting reinforcing piece is firstly determined, and then the supporting reinforcing piece is placed into the corresponding embedding part of the preformed insertion stress plate. And then, a bolt penetrates through the interior of the control tower and sequentially penetrates through the preformed insertion stress plate and the supporting reinforcing piece, the bolt is tightened through a tool, and fixing is completed. According to the invention, through cooperative use of the preformed insertion stress plate and the bolt, stable fixation of the support reinforcer is realized, and the support reinforcer can be kept stable even if bearing a huge load.

The utility model discloses an automatic winding type primary filter, and belongs to the technical field of filters. Comprising a supporting frame, an upper filter material box arranged at the upper end of the supporting frame, a lower filter material box arranged at the lower end of the supporting frame and a fixing plate arranged between the upper filter material box and the lower filter material box. A box door is arranged at the bottom of the upper filter material box, a driven filter material winding roller is arranged in the upper filter material box, a driving filter material winding roller and a cleaning mechanism are arranged in the lower filter material box, a control box and a motor are arranged above the lower filter material box, an output shaft of the motor is connected with the driving filter material winding roller through a belt, and a plurality of carrier roller mechanisms are arranged at the upper end of the fixing plate. A differential pressure sensor is arranged on one side wall of the supporting frame. According to the automatic winding type primary filter adopting the structure, the safety problem brought to workers due to climbing operation when a new filter material winding roller is mounted is avoided, dirty filter materials can be cleaned, the working intensity of the workers is reduced, and the cleaning efficiency is improved.

The invention belongs to the technical field of power transmission line maintenance, and discloses an unmanned aerial vehicle electricity testing auxiliary ground wire hanging and dismounting device which comprises an unmanned aerial vehicle body and a first hook installed on the unmanned aerial vehicle body and further comprises a non-contact electroscope and a communication module which are both installed on the unmanned aerial vehicle body. According to the scheme, the unmanned aerial vehicle body is operated by an operator to drive the first hook to lift the whole mounting frame assembly, the frame body is firstly kept static under the gravity of the frame body, a power transmission cable is clamped between the frame body and the pressing block through resetting of the pressing block, and then the rope is driven by the operation motor to be paid off; meanwhile, the end of the connecting fastener moves downwards to fasten the grounding wire with the connecting fastener, and then an operator lifts the connecting fastener and the grounding wire by pulling the other end of the rope and makes contact with the end part of the guide rod, so that the problems that the grounding wire is hung on the power transmission line in a manual climbing manner, which is relatively tedious and low in safety are solved.

The invention discloses a data security management system and method based on report generation, and relates to the related technical field of data processing, and the method comprises the steps: obtaining a plurality of report data sets corresponding to a plurality of users; and performing security encryption processing on the plurality of report data sets through the plurality of encryption blocks, and outputting a plurality of encrypted report data sets. And carrying out correlation analysis on the plurality of report data sets, and outputting correlation indexes. Based on the relevance index, a temporary security token is generated, and the temporary security token is used for authorizing the current user to access the report data set with the relevance index larger than a preset relevance index. And obtaining a shared report template, and when the plurality of report data sets are input into the shared report template, performing association decryption access management on the shared report template by the current user according to the temporary security token. The technical problem that in the prior art, a security management system is difficult to carry out efficient encryption and security management on report data in a multi-user environment is solved.

The invention belongs to the technical field of power electronics, and provides a doubly-fed converter with a slow shutdown function, a wind power generation system and a shutdown method. A direct-current side energy storage circuit is arranged between a grid-side alternating-current circuit and a machine-side alternating-current circuit; when the power grid load is lost, controlling the grid side alternating current circuit to enter a grid construction voltage source mode, and controlling the machine side alternating current circuit to enter a grid following current source mode; the inertia and the maximum safety speed of the rotor are used as boundaries, the maximum energy capable of being absorbed by the rotor is given, and while the slip power of the rotor is increased, the whole machine power is distributed to a machine side converter; and the direct current side energy storage circuit is controlled to dynamically distribute the residual capacity and store or consume the energy, so that slow shutdown can be realized after the fan system loses the load, the torque and power impact caused by sudden load loss due to a fault and sudden off-grid of the fan system is reduced, a transmission chain system is protected, and the fan load is reduced.

The invention relates to the technical field of organic synthesis, in particular to a method for continuously synthesizing a pyroxasulfone intermediate, which at least comprises the following steps: mixing polyformaldehyde and a compound I to prepare a solution A, respectively introducing the solution A and sulfonyl chloride into a micro-channel reactor for chloromethylation reaction, and after the reaction is finished, carrying out post-treatment to obtain the pyroxasulfone intermediate. The compound I is 1-methyl-3-trifluoromethyl-5-difluoromethoxy-1-H-pyrazole, and the compound II is a compound III. The pyroxasulfone intermediate is 1-methyl-3-trifluoromethyl-4-chloromethyl-5-difluoromethoxy-1-H-pyrazole, and the structural formula of the pyroxasulfone intermediate is shown in the description. By adopting the microchannel reactor, mass transfer between two-phase fluids can be enhanced, rapid and sufficient mixing of two strands of materials is realized, so that the reaction process is enhanced, the flow rate, the reaction temperature, the reaction time, the pressure and the like are controlled for reaction, and the method has the characteristics of high purity, high yield, simple synthesis process, no pollution and easy treatment of three wastes, and is suitable for industrial production. The industrial application is facilitated.

The invention relates to the technical field of warehouse logistics, and discloses a robot code loss self-recovery method, a robot and a warehousing system. The method comprises the steps of identifying at least one target marker within a first preset range around the robot under the condition that a code losing event occurs in the robot, and obtaining a relative position relationship between each target marker and the robot; based on the relative position relationship between each target marker and the robot, determining first position information of the robot in the global map; determining second position information of the target identification code in a global map based on the first position information; and based on the first position information and the second position information, the robot moves to the target identification code and identifies the target identification code. According to the method, after the robot has the code loss event, the position of the robot can be positioned based on the markers around the robot and the global map, and the identification code is searched again, so that the robot identifies the identification code and returns to a normal working state.

The invention relates to the technical field of absolute ethyl alcohol synthesis, and discloses an absolute ethyl alcohol synthesis production monitoring and control system, which integrates a reaction kettle monitoring module, a synthesis equipment module and an intelligent control module, and realizes comprehensive monitoring and intelligent control of an absolute ethyl alcohol synthesis process. The reaction kettle monitoring module collects data such as temperature, pressure, liquid level and reactant concentration in real time, and a basis is provided for intelligent control. The synthesis equipment module comprises a reaction kettle, a stirrer, a heating / cooling device and a rectifying tower and is responsible for synthesis and purification of absolute ethyl alcohol. The intelligent control module constructs an absolute ethyl alcohol synthesis decision-making model, models a synthesis process into a Markov decision-making process, and automatically adjusts an equipment working mode according to real-time data and preset parameters so as to optimize production. According to the system, the energy utilization efficiency is effectively improved, the production cost is reduced, and safe production is ensured.

The invention discloses combined protein nanoparticles based on porcine circovirus type 2 as well as preparation and application of the combined protein nanoparticles. The combined protein nano-particle is formed by self-assembly of an RBD (Radial Basis Description)-Spatier fusion protein and a PCV2 (Poly Carbonaceous V2)-Spytag nano-particle. The combined protein nano-particle based on the porcine circovirus type 2 can generate a high-level RBD specific antibody earlier, and compared with an RBD monomer, the combined protein nano-particle based on the porcine circovirus type 2 can induce generation of a higher-level RBD specific IgG2a antibody and a same-level and same-RBD specific IgG1 antibody. Meanwhile, the level of the combined protein nanoparticles based on the porcine circovirus type 2 for generating neutralizing antibodies is highly consistent with that of wild PCV2 nanoparticles, and the immunogenicity of the PCV2 is not influenced. The combined protein nanoparticles based on the porcine circovirus type 2 can prevent infection of PCV2 and PEDV viruses at the same time, and time and cost of secondary vaccination are avoided.

The invention provides a power supply time sequence control method and circuit and a motor controller, and relates to the technical field of motor controller power supply control, and the method comprises the steps: initializing a power supply control circuit, in which a chip power supply end, an upper bridge circuit power supply end and a lower bridge circuit power supply end do not supply power; the micro-control unit controls the chip power supply end, the upper bridge circuit power supply end and the lower bridge circuit power supply end to supply power successively, and controls the power supply of the next power supply end after monitoring that the power supply of the previous power supply end is normal, so as to start the power supply control circuit; the micro-control unit monitors the power supply control circuit in real time, and when a circuit under-voltage signal is monitored, power supply of a chip power supply end, an upper bridge circuit power supply end and a lower bridge circuit power supply end is restarted for multiple times in sequence so as to determine a fault position and / or perform fault elimination. The problem that a power supply network integrally enters a protection mode and a non-fault circuit cannot work due to short-circuit protection performed by fuse and chip hiccup protection of an existing power supply is solved.

The invention discloses a gamma-glutamyl formamide synthetase mutant, which has higher theanine synthesis activity and can be used for improving the yield and conversion rate of theanine. The invention also discloses a theanine production chassis strain constructed by introducing genes such as tea tree alanine decarboxylase and the like, the strain can be used for endogenous synthesis of ethylamine, and the problems of safety, high cost and the like caused by exogenous addition of ethylamine in the theanine production process can be avoided. When the strain is used for expressing a high-activity gamma-glutamylformamide synthetase mutant, and is applied to fermentation production of theanine, the yield and conversion rate of theanine can be greatly improved, the safety is improved, the production cost is reduced, and the strain has important significance on large-scale production of theanine.

The invention discloses a real-time road edge fusion method for driving of an automatic driving vehicle. The method comprises the following steps: step 1, initializing a data source; the data source comprises a visual perception data source S, a millimeter wave radar data source L and a vehicle driving information data source Z; 2, updating the road edge line based on the visual perception data source S to obtain a visual road edge line yS (x); updating the road edge line based on the millimeter wave radar data source L to obtain a radar road edge line yL (x); the driving state and the conversion matrix RT are updated based on the vehicle driving information data source Z, and a turning road edge line yZ (x) under the vehicle turning state is obtained; 3, performing fusion processing on the visual road edge line yS (x), the radar road edge line yL (x) and the turning road edge line yZ (x) to obtain a fused road edge line yR (x) after fusion; and 4, taking the fused road edge line yR (x) after fusion as one input value of the road edge line at the next moment, and updating the road edge line y (x) at the next moment. The parking lot autonomous valet parking system and the parking lot autonomous valet parking method have the advantages of obtaining a more robust road edge through fusion of multi-source data, improving safety and reliability of automatic driving and the like.

The invention discloses a method for safely using a cross-bus domain RNIC device to carry out RDMA operation, and the method comprises the steps: obtaining transmission data between a device borrower bus and a virtualized RNIC device after entering a safe task operation state; if the transmission data is application data for RDMA transmission, a specific communication key is obtained, the communication key is independent of a communication key for data transmission between an equipment lender bus and an equipment borrowing bus, and the application data for RDMA transmission comprises memory data for memory registration; and based on the specific communication key, performing security enhancement processing on the application data subjected to RDMA transmission, the security enhancement processing being independent of communication security processing between an equipment lender bus and an equipment borrower bus. According to the invention, through security enhancement processing, the security of data in the process that the equipment borrower uses the virtual RNIC equipment to carry out the RDMA operation can be ensured.