13results about How to "Overcome security" patented technology

The invention provides a data tamper-proofing method and system in a data sharing scene, which solves the problem of data imbalance of a training data set by using an oversampling algorithm and an undersampling algorithm, optimizes a depth anomaly detection model, shares trained model parameters among nodes participating in sharing, and improves the data tamper-proofing efficiency. According to the method and the system, the nodes can use the model with the same detection effect, and the deep anomaly detection model is used for identifying attacks such as counterfeit synthesis or tampering, so that data communication security and efficient matching are ensured, and the problem that privacy leakage and security threats are easily caused by a disclosed channel in the prior art is solved.

The invention provides a capacity attenuation trend prediction method of a low-temperature lithium battery, and relates to the technical field of battery health management and prediction. The capacity fading trend prediction method of the low-temperature lithium battery specifically comprises the following steps of S1, initial data acquisition, S2, feature extraction, S3, hybrid prediction model construction, S4, model training and offline verification, S5, online deployment and dynamic correction, and S6, SOH evaluation and early warning output. A hybrid prediction model is constructed by fusing an electrochemical mechanism and deep learning, so that high-precision prediction and full-life-cycle intelligent health management of lithium battery capacity fading in a low-temperature environment are realized, and the problems of accelerated battery aging and prominent safety risk in an alpine region are effectively solved; early warning and intelligent management of the health state of the battery can be realized, and the service life of the battery under low-temperature application can be prolonged.

The invention discloses a bridge floor pushing high beam falling construction method which comprises a first-stage beam falling process and a second-stage beam falling process. The first-stage beam falling process comprises the steps that a first height-adjustable temporary support and a second height-adjustable temporary support which are used for supporting a guide beam are arranged on a concrete beam; the height of the first height-adjustable temporary support and the height of the second height-adjustable temporary support are alternately adjusted and lowered, and then the height of the guide beam is gradually lowered till the guide beam is close to the concrete beam; the second-stage beam falling process comprises the steps that a third height-adjustable temporary support used for supporting the steel box beam is arranged on the bent cap, and a fourth height-adjustable temporary support used for supporting the steel box beam is arranged on the support; and the guide beam is cut off, then the height of the third height-adjustable temporary support and the height of the fourth height-adjustable temporary support are alternately adjusted and reduced, and then the height of the steel box beam is gradually reduced till the steel box beam falls onto the support. According to the method, the beam falling stability can be improved, and the danger coefficient can be remarkably reduced.

The high-toughness fabric comprises a fabric body (1) and is characterized in that the fabric body (1) comprises a first flame-retardant layer (11), a bacteriostatic layer (12) and a second flame-retardant layer (13), the first flame-retardant layer (11) and the second flame-retardant layer (13) are arranged on the inner surface and the outer surface of the bacteriostatic layer (12), the first flame-retardant layer (11) is arranged on the outer surface of the bacteriostatic layer (12), the bacteriostatic layer (12) is arranged on the outer surface of the bacteriostatic layer (12), and the second flame-retardant layer (13) is arranged on the outer surface of the bacteriostatic layer (12). The second flame-retardant layer (13) is arranged on the inner surface of the antibacterial layer (12); the fabric disclosed by the utility model has the functions of good flame retardant property, strong antibacterial property, high toughness and good wear resistance.

The invention relates to a method for preparing cyclododecanone oxime, which comprises the following steps: S1, in the presence of a molecular sieve catalyst, carrying out hydrolysis reaction on an oxime compound and water to obtain a hydrolysis reaction product, and carrying out solid-liquid separation on the hydrolysis reaction product to obtain a solid-phase hydroxylamine molecular sieve and a liquid-phase product; and S2, mixing the solid-phase hydroxylamine molecular sieve, cyclododecanone and an optional solvent, and carrying out an oxime exchange reaction. According to the method provided by the invention, the problems that the catalyst and the reaction liquid are difficult to separate and the catalyst cannot be recycled can be effectively solved, the separation and purification process of the product and the reaction liquid in the oxime exchange reaction is effectively simplified, and a relatively high raw material conversion rate can be realized in a reaction system with relatively small dosage of cyclododecanone. In addition, the method disclosed by the invention is simple to operate and mild in condition, can realize continuous feeding and continuous reaction to generate hydroxylamine, and has a relatively good application prospect.

This application provides a network security risk assessment and analysis system, method, and related equipment. By setting up physical security, network security, and management security modules, it comprehensively collects and monitors data from three core dimensions: the physical environment of the data center, network system operation, and personnel management. This enables real-time perception of data center environmental risks and effectively overcomes the shortcomings of traditional assessment methods that only focus on single or partial security elements, ensuring the comprehensiveness and systematic nature of risk assessment. The risk assessment and analysis module is connected in real-time to the above three modules, continuously receiving and analyzing various types of security data, realizing a shift from static assessment to dynamic monitoring. Through real-time correlation and analysis of comprehensive data, potential security risks can be accurately identified, and warnings can be issued promptly based on preset warning conditions. This overcomes the lagging and passive nature of traditional assessment methods, truly achieving prevention before problems arise and significantly improving security response speed and accuracy.

The invention relates to an attribute-based encryption method, system and device and a storage medium. The method comprises the steps that a data access request of a data user is received, the data access request comprises a user identifier of the data user and a requested ciphertext, and the ciphertext comprises access control layer information and encrypted data layer information; obtaining a user list, determining a conversion key corresponding to the data user from the user list according to the user identifier, and performing primary decryption on the ciphertext according to the conversion key to obtain a primary conversion ciphertext; sending the user identifier and the primary conversion ciphertext to a trusted execution environment, so that the trusted execution environment performs secondary decryption on the primary conversion ciphertext to obtain a secondary conversion ciphertext, and sending a decryption instruction carrying the secondary conversion ciphertext to the data user; wherein the decryption instruction is used for instructing the data user to decrypt the secondary conversion ciphertext for the third time, so as to obtain the target data. By adopting the method, the controllability of the data user authority can be realized more safely and conveniently.

The invention relates to a method for preparing cyclododecanone oxime, which comprises the following steps: in the presence of a solid acid catalyst, cyclododecanone, an oxime compound and an optional solvent are mixed for oxime exchange reaction, and the solvent is a non-acidic solvent. According to the method disclosed by the invention, the oxime in the oxime compound is replaced by cyclododecanone under the action of the solid acid catalyst instead of using a liquid acid catalyst, so that the problems that the liquid acid catalyst is difficult to separate from the reaction liquid, the catalyst cannot be repeatedly used and the like are solved; the separation and purification process of the product and the reaction liquid in the oxime exchange reaction process is effectively simplified, and the method is a continuous and green production process and has a better application prospect.

The invention relates to a robot safety planning control method and system based on risk sensitive reinforcement learning. The method comprises the following steps: constructing a robot depth increment model according to robot data; the robot safety planning control architecture comprises a planning layer and a control layer. A reference trajectory is designed on a planning layer with a robot depth increment model as a constraint condition; determining upper and lower bounds of a tracking error of the control layer according to expert experience, and constructing a buffer area for collision detection by using the upper and lower bounds of the tracking error; constructing a risk sensitive function in a control layer based on the size of a buffer area, and constructing an optimal value function representing that the energy is optimal and the specific performance tracks a reference trajectory based on the risk sensitive function; the optimal value function is solved, input acting on the robot and used for tracking is obtained, and the robot is driven to safely complete a set task. By means of the method, the safety and precision of the robot in the task establishing process can be improved.

The rotary compartment of the sightseeing vehicle comprises a compartment chassis located at the bottom and a compartment body rotatably installed on the compartment chassis, and the rotation axis of the compartment body is perpendicular to the advancing direction of the compartment chassis; a carriage bottom plate is arranged at the bottom of the carriage body, and a horizontal adjusting device is installed between the carriage bottom frame and the carriage body. The horizontal adjusting device is configured to drive the carriage main body to rotate to adjust the carriage bottom plate to a horizontal state when the carriage bottom frame goes uphill and downhill to enable the carriage bottom plate to incline; the horizontal adjusting device comprises a driving motor mounted on the carriage chassis and a driving gear in driving connection with the driving motor, an arc-shaped rack is fixed on the outer circumferential wall of the carriage main body, and the driving gear is meshed with the arc-shaped rack; the rotary compartment of the sightseeing vehicle overcomes the defects that an existing compartment of the sightseeing vehicle is poor in riding comfort and safety.

The invention provides a data source switching method which can be applied to the technical field of computers, the technical field of big data or the field of financial science and technology. The method comprises the following steps: storing host source table data into a data lake to obtain a host lake-entering file, and storing platform source table data into the data lake to obtain a platform lake-entering file; according to the characteristic parameters of the region, determining a prediction influence value generated under the condition of switching the data source of the region; dividing the area into k pilot point switching area groups according to the predicted influence value; switching data sources corresponding to the k pilot point switching area groups batch by batch according to the influence level obtained by utilizing the predicted influence value, switching the data source for generating the anticorrosion file from a reference processing result file to a processing result file, and switching the data source for generating the host access file from host source table data to platform source table data. The invention further provides a data source switching device and equipment, a storage medium and a program product.

The invention relates to the field of complex electromechanical system health management, in particular to a complex electromechanical system maintenance opportunity decision-making method under overload operation. The method comprises the following steps: constructing a performance evaluation model based on a belief rule base, defining key feature indexes, overload environment attributes and reference levels thereof, rule weights and attribute weights, and presetting consequent confidence distribution for each rule; monitoring data are collected, the matching degree of the key feature indexes in each rule is calculated, meanwhile, an overload cumulative index is constructed, and the matching degree of overload environment attributes is calculated; calculating a rule activation weight based on the two types of matching degrees, multiplying consequent confidence distribution by the activation weight, fusing by adopting an evidence reasoning algorithm to obtain confidence distribution of a system performance state, and further calculating an output utility value; and determining an optimal maintenance opportunity based on a preset mapping relation. According to the method, the overload environment attribute is introduced into the activation weight calculation, so that the accuracy of health assessment under the overload working condition is improved.

The invention discloses an anti-counterfeiting method for encrypting by combining watermark content and image content and related equipment. The method comprises the following steps: acquiring a shot picture and recording shooting information of the picture; adding service information and shooting information which need to be displayed to the picture in a watermark form to obtain a to-be-encrypted watermark picture; performing digital signature on the watermark information through a secret key, converting a signature result into a first check color, and adding the first check color to the picture; unencrypted watermark information is uploaded to a server, the server receives the unencrypted watermark information and then returns a picture ID, and the client records the picture ID after receiving the picture ID and stores the picture ID in a non-sampling area of the picture; and submitting the picture to be verified to a server, comparing the second verification color with the first verification color, if the colors are consistent, passing verification, and if the colors are not consistent, not passing verification. According to the method, the picture content and the watermark information are combined for comprehensive encryption and are presented in a verification color form, so that the anti-counterfeiting effect is enhanced.