48results about How to "Security is not compromised" patented technology

The invention relates to a capacitor voltage sorting frequency optimization control method and system of a converter. The optimization control method comprises the steps of obtaining system parametersof the converter, operating parameters of the converter, and preset converter sub module capacitor voltage fluctuation percentage; obtaining the maximum increment of the sub module of the converter in a capacitor voltage updating period according to the system parameters; and obtaining the capacitor voltage sorting frequency of the converter according to the operating parameters, the preset converter sub module capacitor voltage fluctuation percentage and the maximum increment. In the scheme, the sorting frequency is obtained under the premise of satisfying the preset converter sub module capacitor voltage fluctuation percentage, so that it is ensured that the safety and reliability of the converter are not influenced; in addition, the minimum sorting frequency can be obtained under the maximum capacitor voltage increment; when the sorting frequency is applied to a capacitor voltage sorting algorithm, the switching frequency of a switching device can be lowered; and in addition, the implementation mode is simple, and the problem of overhigh resource consumption of the switching frequency of the converter can be solved.

The invention provides a boiler combustion optimization information transmission control system. Boiler combustion optimization information of an SIS is converted into physical signals through a first industrial personal computer, the physical signals can be recognized by an AO data acquisition device, the AO data acquisition device is communicated with an AI data acquisition device at the end of a DCS through hardware wiring, and therefore physical isolation between the SIS and the DCS is achieved. The boiler combustion optimization information is transmitted to a second industrial personal computer in the mode of the physical signals, calculation is performed on the boiler combustion optimization information through the second industrial personal computer to generate combustion optimization control instructions, and then the combustion optimization control instructions are transmitted to a distributed control system through a serial port for combustion control. Hardware wiring is a basic data transmission mode, is a pure physical signal, and can shield abnormal information and guarantee that the safety of the DSC is not influenced. A serial port communication mode has a complete verification mechanism, and therefore the safety of data communication is guaranteed further.

The invention provides a trusted access method for an energy internet, a trusted client and a server. A trusted authentication service system (comprising a trusted server and a trusted client) is added between an unauthorized terminal and a to-be-interacted energy system; the network access security of various energy internet unauthorized terminals is realized by using a credible access idea, theinformation interaction of a system-level energy system is realized, the interaction security between systems is ensured, and the problem of vulnerability attack caused by the difference between multiple systems is avoided.

The invention provides a combined hierarchical cryptographic mechanism based on pairs. The mechanism comprises the following steps: S1, initializing a root PKG; S2, generating a private key; S3, performing signing; s4, performing signature verification. On the basis of an HIBC encryption mechanism, a combined public and private key idea is introduced, a data storage mode is improved, data transmission is reduced, and the robustness of the system is improved while the information transmission and signature verification efficiency is improved; a combined public key idea is introduced into generation and verification of public and private keys of the layer of the PKG, so under the condition that the PKG of a certain i layer is broken through, only the private keys of the nodes of the i + 1 layer can be forged under the PKG, the security of the nodes larger than the i + 1 layer is not affected, and the robustness of the system is greatly improved. A flat hierarchical identification password encryption and decryption and signature verification algorithm is designed, so the problem of overlong signature or ciphertext caused by interactive transmission of a plurality of PKG local layer public keys is avoided, and a support is provided for signature verification and ciphertext decryption offline optimization.

A simply supported hollow plate girder bending resistance reinforcement method has the construction steps of demounting ancillary facilities of a bridge deck, chiseling hinge joints between girders and a bridge deck cast-in-situ layer, and retaining the girders; setting up operation platforms used for construction to carry out surface treatment on the girders; jacking the girders through jacks under the precondition that safety of the girders is guaranteed; removing mid-span bending moments of dead load of the girders; sticking steel plates after the bending moments of dead load of the girders are removed; pouring concrete to the hinge joints and the bridge deck cast-in-situ layer; synchronously uninstalling the jacks after the curing time is reached, so that the girders are located on supports, and then removing the jacks; pouring concrete to the hinge joints and the bridge deck cast-in-situ layer; restoring the ancillary facilities of the bridge deck, and completing the bending resistance reinforcement of the girders. The simply supported hollow plate girder bending resistance reinforcement method has the beneficial effects that the steel plates are stuck after the mid-span bending moments of dead load of the girders are removed, thus the steel plates can not only participate in the bearing of the load of automobiles and later-imposed dead load, but also participate in the bearing of the removed bending moments of dead load, so that the bending resistance bearing capacity of the girders can be improved; the steel plates are stuck when the strain stress of rebars at mid-span tensile regions of the girders is decreased, so that the material performance of the reinforcing steel plates can be fully exerted better.

The invention relates to an operation and restoration method of a rail transit signal system based on domestic encryption technology. According to the method, it is judged that a domestic encryption security chip possibly fails through the signal system itself, if a fault occurs, the domestic encryption security chip is isolated, the signal system is enabled to restore to a state where the encryption technology is not adopted, and meanwhile, warning information is given to a maintenance terminal in the shortest time; and compared with the prior art, the method has the advantages that the normal operation of the signal system is still not affected even under the condition that the domestic encryption security chip fails, and the like.

The invention relates to a login authentication method and a login authentication device. The method comprises the steps of receiving a first message from TM equipment, wherein the first message carriers the information of the TM equipment; performing logical operation processing on the information of the TM equipment and/or the information of TC equipment to acquire a logical operation result, and generating a user name and a password corresponding to the TC equipment according to the logical operation result; and under the condition of receiving a session request from the TM equipment, performing login authentication on the session request according to the user name and the password used for logging in the TC equipment and carried by the session request and the generated user name and password corresponding to the TC equipment. According to the login authentication method and device provided by the invention, the user name and the password corresponding to each piece of TC equipmentare dynamically generated, and do not need to be statically configured by an administrator of the TC equipment. In addition, the user name and the password corresponding to each piece of TC equipmentare not accordant basically, and the security of the SmartMC network is wholly greatly improved.

The invention discloses a case body of an electric fire case. The case body is characterized in that one or a pair of U-shaped grooves are formed in the upper edge of a frame of the case body, and holes which are capable of exposing the U-shaped grooves completely are formed in the skirt of a covering quilt. A user can extend feet into the case body through the holes, knees can span on the U-shaped grooves in a crossed or separated manner, so that calves and knees can get warmed with the feet simultaneously; gaps between the legs and the case body and the covering quilt are eliminated, and comfort and energy-efficient effect of the existing electric fire case are improved significantly; when the user stands up and leaves, the U-shaped grooves are cooling channels, so that possibility of a fire due to heat accumulating is eliminated completely, and security level of the existing electric fire case is raised significantly.