83 results about "Integrity assessment" patented technology

The present invention involves systems and related methods for performing dynamic pedicle integrity assessments involving the use of neurophysiology.

Procedures are described for enhancing target system execution integrity determined by power fingerprinting (PFP): by integrating PFP into the detection phase of comprehensive defense-in-depth security; by deploying a network of PFP enabled nodes executing untrusted devices with predefined inputs forcing a specific state sequence and specific software execution; by embedding module identification information into synchronization signaling; by combining signals from different board elements; by using malware signatures to enhance PFP performance; by automatic characterization and signature extraction; by providing secure signature updates; by protecting against side-channel attacks; performing real-time integrity assessment in embedded platform by monitoring their dynamic power consumption and comparing it against signatures from trusted code, including pre-characterizing power consumption of the platform by concentrating on trace sections carrying the most information about the internal execution status; by using PFP from sequence of bit transitions to detect deviations from authorized execution of software in a digital processor.

Frame of the invention includes three entities: accessing requestor, accessing controller, and strategy manager. The strategy manager manages the accessing requestor and the accessing controller as well as implements bidirectional user ID authentication between them, and evaluates integrality of platform. Based on decision made from the strategy manager, the accessing requestor and the accessing controller control local ports. Before terminal is connected to network, trusty network connection architecture (TNCA) measures state of platform. Based on secure protocol of trusty third party, the invention implements the said authentication and evaluation of platform so as to guarantee security of TNCA. Introducing strategy manager simplifies key management of the architecture, raises extensibility of the architecture. Features are: higher security for evaluating integrality of platform, centralized verifying integrality, and higher universality.

A pedicle access system including a cannula, a stylet, and a removable T-handle. The pedicle access system may be used to percutaneously approach the pedicle, initiate pilot hole formation, and conduct a stimulation signal to the target site for the purposes of performing a pedicle integrity assessment during the pilot hole formation. To do this, the cannula and stylet are locked in combination and inserted through an operating corridor to the pedicle target site, using the T-handle to facilitate easy movement and positioning of the cannula/stylet combination. A stimulation signal may be applied during pilot hole formation to conduct the pedicle integrity assessment. In a significant aspect, the T-handle may be detached from the cannula/stylet combination to facilitate the use of various surgical tools as necessary.

The invention provides a trusted network connection method based on ternary equal authentication, which pre-prepares a platform integrality information, prepares an integrality authentication request. A network access requester sends a access request to a network access controller, the network access controller starts a two-way authentication process of users, and user authentication service unit performs an equal authentication protocol. After the two-way user authentication is success, a TNC client-side, a TNC service side and a platform evaluate service unit execute a platform integrality evaluate by using the ternary equal authentication method. The network access requester and network access controller achieve an inter access control between the access requester and a access controller based on a recommended control terminal received respectively. The invention solves the technical problems in background technology that expandability is poor, the key arrangement process is complex, and the security is low and the platform integrality evaluate is unequal. The invention simplifies the key management and integrality authentication mechanism of trusted network connection, expands the range of applicability of trusted network connection.

The invention provides a trusted network connection system based on ternary equal authentication, wherein a network access requester is connected with a TNC client-side by a data carrying manner, and a TNC client-side is connected with an integrality collector by an integrality measurement collecting interface. A network access controller of an access controller is connected with a TNC service side by the data carrying manner, the TNC service side is connected with an integrality collector by the integrality measurement collecting interface. A user authentication service unit of a policy manager is connected with a platform evaluate service unit by the data carrying manner, and the platform evaluate service unit is connected with an integrality verifier by an integrality measurement verify interface. The invention solves the technical problems in background technology that expandability is poor, the key arrangement process is complex, and the security is low. The network access layer and integrality evaluate layer of the invention use ternary equal authentication to realize a two-way user authentication and a platform integrality evaluate, so, the invention can improve the security of the whole trusted network connecting construction.

A trusted network connect method for enhancing security, it pre-prepares platform integrity information, sets an integrity verify demand. A network access requestor initiates an access request, a network access authority starts a process for bi-directional user authentication, begins to perform the triplex element peer authentication protocol with a user authentication service unit. After the success of the bi-directional user authentication, a TNC server and a TNC client perform bi-directional platform integrity evaluation. The network access requestor and the network access authority control ports according to their respective recommendations, implement the mutual access control of the access requestor and the access authority. The present invention solves the technical problems in the background technologies: the security is lower relatively, the access requestor may be unable to verify the validity of the AIK credential and the platform integrity evaluation is not parity. The present invention may simplify the management of the key and the mechanism of integrity verification, expand the application scope of the trusted network connect.

An implantable hearing prosthesis, comprising an integrated integrity system. The integrity system is configured to measure one or more electrical characteristics of at least one component of the prosthesis, to evaluate the integrity of the prosthesis based on the measurements, and to perform at least one diagnostic operation based on the evaluation.

A trusted network connect handshake method based on tri-element peer authentication is provided, which comprises the following steps. An access controller (AC) sends message 1 for handshake activation to an Access Requestor (AR). The AR sends message 2 for access handshake request to the AC after receiving message 1. The AC sends message 3 for certificate authentication and integrity evaluation request to a Policy Manager (PM) after receiving message 2. The PM sends message 4 for certificate authentication and integrity evaluation response to the AC after receiving message 3. The AC sends message 5 for access handshake response to the AR after receiving message 4. The trusted network connect handshake is completed after the AR receives message 5.

The invention discloses a machining and manufacturing method for spiral weld defects of pipelines. The machining and manufacturing method includes marking a metal plate which is required to be cut off and contains a spiral weld joint on the surface of a pipeline by a marking pen, and cutting off the metal plate containing the spiral weld joint by a cutting machine; machining a penetrating defect with a preset length and a preset width at the position corresponding to the spiral weld joint of the metal plate by means of cutting, grinding and polishing, then filling a brass strip with the size the same with that of the designed defect to the position with the defect, performing backing weld for two sides of the defect buried by the brass strip or one side of the opening defect, and performing filling welding until the shape of the metal plate is normal; and finally welding the metal plate containing the machined spiral weld defect onto the pipeline, and grinding excess weld metal of the weld joint welded back to the pipeline so as to complete machining and manufacturing for the weld defect. By the machining and manufacturing method, machining and manufacturing of the spiral weld defects with different sizes and at different positions can be performed, the machining and manufacturing method can be used for traction experiments, calibration of detectors and verification for performance indexes can be completed, and the accuracy of pipeline integrity assessment results is improved.

The invention provides a GBAS integrity performance evaluation method based on a pseudo-range error distribution model. The method is characterized in that an airborne receiving end collects pseudo-range error sample data for GBAS integrity performance evaluation, and comprises the following steps: a) grouping the pseudo-range error sample data; b) for each group of pseudo-range error samples, establishing a Gaussian kernel quadratic Gaussian polynomial tail distribution model; c) carrying out weighted sum on each group of pseudo-range error distribution model to obtain an overall pseudo-rangeerror distribution model; d) projecting the pseudo-range domain error to positioning domain error; e) calculating the probability that the positioning domain error is larger than an alarm limit to obtain an integrity risk probability value; and f) evaluating the integrity performance of a GBAS system. The GBAS integrity performance evaluation method based on the pseudo-range error distribution model improves calculation accuracy of the integrity risk probability value and improves effectiveness of integrity assessment.

The invention discloses a lug fissure integrity assessment method, device and system. The method comprises the steps: obtaining a lung image; detecting the lung fissure in the lung image; carrying out the smoothing of the lung fissure through a linear filter; recognizing the left lung oblique fissure, right lung oblique fissure and right lung horizontal fissure from the lung fissure; determining the complete lung fissure according to the left lung oblique fissure, right lung oblique fissure and right lung horizontal fissure; and determining the lug fissure integrity according to the recognized left lung oblique fissure, right lung oblique fissure, right lung horizontal fissure and the complete lung fissure. The method solves a technical problem in the prior art that the accuracy of lung fissure assessment is low.

The invention relates to a block-chain-technology-based personal integrity system and an implementation method thereof. Terminals for storing personal integrity databases are connected to form a network topology structure; any of the terminals receives collected personal integrity data and updates the stored personal integrity database; block packaging is carried out on the collected personal integrity data to form new blocks and the new blocks and the existing blocks are linked to form a block chain; the new blocks are encrypted by using a public key to form ciphertexts and the ciphertexts are sent to the other terminals; and the other terminals decrypt the ciphertexts by private keys to obtain the collected personal integrity data and then update the stored personal integrity databases. Therefore, on the basis of the block chain technology, the personal integrity data are stored in all participant terminals to realize decentration and distributed sharing of the personal integrity data; the information transparency is high; and the objectivity and reliability of integrity assessment are improved.

The invention provides a GBAS integrity assessment and processing method and system. The method comprises the steps of obtaining a time-related error of a GBAS, decomposing the obtained linear system based on the time-related error to obtain a first unknown sub system G1, a second unknown sub system G2 and a known sub system H; conducting timing model fitting for the first unknown sub system G1 and the second unknown sub system G2 respectively to obtain the model parameter and fitting residue of the first unknown sub system G1 and the model parameter and fitting residue of the second unknown sub system G2; obtaining the envelope of the time-related error according to the model parameter and fitting residue of the first unknown sub system G1, the model parameter and fitting residue of the second unknown sub system G2, and the unit pulse response of the unknown sub system H; obtaining the protection level of the GBAS according to the envelope of the time-related error; and comparing the protection level and a preset alarm limit, and generating an alarm signal when the protection level exceeds the preset alarm limit.

The invention relates to a selection method of pipe plugging for a shell-sand-tube heat exchanger and relates to the field of detection and evaluation of the shell-sand-tube heat exchangers in petrochemical industry. The method disclosed by the invention selects leakage heat exchange tubes based on a conventional hydrostatic test, and selects heat exchange tubes which are likely to leak within a next operational cycle by NDT (non destructive testing) and integrity assessment technologies. The NDT technology is used for finding out present defect sizes of the heat exchange tubes containing detects, the integrity assessment technology is used for obtaining a present maximum allowed defect size of the heat exchange tubes, and the maximum allowed defect size is a difference between a critical failure defect size and defect increment and NDT uncertainty in the next operational cycle. If the present defect size is smaller than the maximum allowed defect size, pipe plugging does not need to be implemented; otherwise, the pipe plugging needs to be implemented. The method disclosed by the invention can be implemented in the process of maintenance for selecting relatively dangerous heat exchange tubes and further plugging the tubes, thus effectively reducing temporary stop times of the heat exchanger in the operational cycle and then reducing enterprise accident potentials and improving enterprise economic benefits.