38results about How to "Solve imperfections" patented technology

The invention discloses an equipment state prediction method based on fault tree information, comprising the following steps: firstly, searching a fault tree model, representing each event in the model by different variables, and representing a logic gate in the model by the structural relationship set of the variables; successively calculating fault reason variable prior probability distributionsets in a fault prediction model; calculating the conditional probability distribution of a fault mode variable and the conditional probability distribution of a fault transferring variable in the fault prediction model; representing the practical fault detection phenomenon of the equipment by a corresponding fault detection variable in the fault prediction model; according to incidence relation represented in the structural relationship set of the fault detection variables, calculating the conditional probability distribution of the fault detection variable in the fault prediction model; andaccording to the fault detection phenomenon real-time information collected on site, calculating equipment fault mode posterior probability state distribution. The invention can quickly and accurately predict the real-time state of the equipment, guides the monitoring and maintenance for equipment, effectively improves the maintenance efficiency and lowers the maintenance cost.

The invention belongs to the technical field of information security, in particular to a key backup and recovery method based on integrated encryption technology. The method of the present invention includes: configuring a security level, configuring different encryption algorithms and the amount of information that the user needs to input for the corresponding security level; obtaining an encryption key according to the user's biometric information and private information, and encrypting the key that the user wants to back up and store encryption algorithm; store the information generated by integrated encryption; when the key needs to be used for decryption or signature, the encrypted key needs to be decrypted and recovered; when the password needs to be changed, all initial keys must be obtained first Plaintext, re-encrypt; re-store the encrypted key, overwrite the old data, and complete the operation of modifying the password. The method of the invention balances security and ease of use, users set passwords with different security levels according to their own needs, and the integrated encryption algorithm solves the problem of imperfect key storage methods in the prior art.

The invention discloses a two-way-security-authentication-based data downloading method and a two-way-security-authentication-based data downloading system. The method comprises that: a first terminal verifies a second terminal through a symmetric key algorithm to acquire a first verification result; after the second terminal is determined to be a legal terminal according to the first verification result, the second terminal verifies the first terminal through an asymmetric key algorithm to acquire a second verification result; and after the first terminal is determined to be a legal terminal according to the second verification result, the second terminal downloads data which is encrypted through a digital signature algorithm to the first terminal. By the method and the system, the creation of two-way authentication channels and security downloading among different terminals can be realized, and the security and integrity of interactive data are protected.