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120results about How to "Reduce credibility" patented technology

Internet-of-Vehicles trust management method based on block chain

The invention discloses an Internet-of-Vehicles trust management method based on a block chain, and the method comprises the steps: firstly calculating the credibility of received vehicle informationrelated to an event, judging the occurrence probability of each event through the credibility of the vehicle information, generating a rating for transmitted information, and uploading the rating of the vehicle information to nearby RSUs; enabling the RSU to call a reputation value updating method in an intelligent contract deployed on a block chain to calculate a vehicle reputation value, whereinthe calculated vehicle reputation value and the collected rating information are all packaged into a block; through a consensus mechanism combining PoW and PoS, ensuring RSUs with larger change of vehicle reputation values to serve as miner nodes to publish blocks; and enabling other RSUs to re-use the reputation value updating method of the smart contract to re-calculate the rating in the release block, and if the calculation results of most nodes are consistent with the data in the release block, releasing the release block to the block chain to realize Internet-of-Vehicles trust management. According to the invention, the data security is ensured, and the accuracy of event judgment in the Internet of Vehicles is improved.
Owner:NORTHWESTERN POLYTECHNICAL UNIV

Flash memory error correction method and device

The invention provides a flash memory error correction method and device. The method comprises the steps of determining a first data bit in data obtained by reading a flash memory page by a (n+1)th voltage reading threshold value and data obtained by reading the flash memory page by a mth voltage reading threshold value, wherein the first data bit is a data bit which has different corresponding data in the same data bit in the data obtained by reading the flash memory page by the (n+1)th voltage reading threshold value and the data obtained by reading the flash memory page by the mth voltage reading threshold value, and further, the credibility of the first data bit in the data obtained by reading the flash memory page by the (n+1)th voltage reading threshold value; performing error correcting decoding on data obtained by reading the flash memory page by the (n+1)th voltage reading threshold value according to the credibility of the first data bit after regulation. The data obtained by reading the same flash memory page twice is used in a combined way; the credibility of the data bit corresponding to the data with different data bits is reduced, so that the error correcting decoding success rate is effectively improved; the performance of an SSD (solid state drive) storage system can be greatly improved.
Owner:HUAWEI TECH CO LTD

Constructing method of incentive mechanism based on recommended node credibility computation

InactiveCN101626388APrevent common cheatingPrevent problems such as simple calculation of trust valueData switching networksComputer networkCalculation methods
The invention relates to a constructing method of an incentive mechanism based on recommended node credibility computation, which is a strategic method and is provided by updating the recommended node credibility of an environment and combining the recommended node credibility with resource node trust value computation. The invention aims to incent resource nodes of a network to evaluate other nodes by updating the credibility of recommended nodes and also can effectively solve the problem of joint cheat between middle nodes in a trusting model of the network. The constructing method comprises the following steps: firstly, introducing a resource node trust value nearness variable; computing the nearing degree of a resource node trust value; then introducing a time decay weighted average variable of the resource node believe value, wherein time decay is taken as a weight factor to average a resource node history believe value in a weighted way; and finally, computing a comprehensive believe value of the resource nodes by combining the resource node believe value nearness variable with the time decay weighted average variable. The method prevents the excessive simpleness of a previous method and has high computation result credibility.
Owner:NANJING UNIV OF POSTS & TELECOMM

Virtual item trading method and system using electronic tags

The invention discloses a virtual item trading method and system using electronic tags, relates to the field of Internet e-commerce and communication and particularly relates to a virtual item trading method and system using electronic tags. The method and system provided by the invention can be used for overcoming the defects existing in virtual item trading technologies under the existing technical conditions. The virtual item trading system comprises a client unit, a user information management unit, a user property management unit, a trading market unit, an electronic tag management unit and a server unit; and a direct trading way is established for the supply and requisitioning parties of virtual items, so that the individually-accumulated valuable data of Internet users can be circulated, thereby satisfying the needs of other users. According to the invention, the enthusiasm of the Internet users for spreading resources possessed by the Internet users is improved by using a market trading mechanism, therefore, one the one hand, the wealth of networks is accumulated for resource suppliers, and on the other hand, the demands of the users on network resources are satisfied. Under the existing technical conditions, valuable network resources are spread less and mutually copied and duplicated much, especially the contents of virtual items are lack of transparency, and such defects reduce the credibility of resources in the process of network resource circulation. By using the method and system disclosed by the invention, one the one hand, the variety of network resource circulation is expanded, meanwhile, electronic tags are created for all circulated virtual items, a value judgment basis of virtual items is provided for buyers, and the reliability of virtual item trading is increased by using a technical means.
Owner:深圳市财富万方信息技术有限公司

Parallel stage separation free flight wind tunnel testing device with mass center located on interface

A parallel stage separation free flight wind tunnel testing device with the mass center located on the interface comprises a first model, a second model, a pull pin frame, pins, a first fixing nail, asecond fixing nail, a first spring, a second spring, a first pull pin and a second pull pin. The first pull pin, the second pull pin and the pull pin frame are installed together through the two pins, the first fixing nail and the second fixing nail penetrate through respective springs and are inserted into the first model and the second model, and the pull pins installed just are inserted into the models from the model tails and are just inserted into a round hole formed by a semi-circular groove of the first fixing nail and a round hole formed by a semi-circular groove of the second fixingnail to lock the whole model set. It is ensured that the first model and the second model can be fast and effectively separated without interference, the problem that a parallel stage separation freeflight wind tunnel test with the mass center located on the interface cannot be realized is solved mainly, and the defect that two stages cannot release the freedom degree at the same time due to theprevious model fixing mode is overcome.
Owner:CHINA ACAD OF AEROSPACE AERODYNAMICS

Gravity matching method based on self-adaptive robust untracked Kalman filtering

The invention discloses a gravity matching method based on robust self-adaptive untracked Kalman filtering. The method comprises the following process of building a system state equation and observation equation of a gravity assistance inertial navigation system filter on the basis of a single-point matching algorithm of the recurrence filtering; performing subtraction on the gravity abnormal reference value extracted from the current moment gravity abnormal pattern and the gravity abnormal practical measuring value to obtain the gravity abnormal difference value; on the basis of the improvedARUKF algorithm, performing filtering on the gravity abnormal difference by using the system state equation and the observation equation of the gravity assistance inertial navigation system filter soas to obtain the position and the variance of a submersible vehicle at the next moment; calculating the submersible vehicle position at each filtering sampling moment in the mode by using the positionand the variance of the submersible vehicle at the next moment; finally obtaining a complete matching track. The matching error can be effectively reduced; the navigation positioning precision of thegravity assistance inertial navigation system is improved.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY
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