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320 results about "Sequence pattern" patented technology

User credibility authentication system and method based on user behaviors

The invention discloses a user credibility authentication system and method based on user behaviors. The system comprises a user identity and behavior model determination module, a user behavior collection module, a user behavior mining module, a user behavior sequence matching and credibility authentication module and a local security policy module. The method comprises the steps as follows: the user behavior mining module performs behavior mining on user behavior logs; a personal user behavior characteristic sequence is established; the user behavior sequence matching and credibility authentication module performs sequence similarity calculation on the personal user behavior characteristic sequence and a to-be-matched sequence, so that a user credibility grade is obtained, and a corresponding security policy is started using. According to the invention, a sequence pattern mining manner is adopted to collect real-time user behaviors so as to establish the to-be-matched sequence, the similarity matching of the behavior sequence is performed, accordingly, the real-time user behaviors are subjected to credibility authentication, the accurate rate of authentication is improved, and enterprise and personal property safety is guaranteed.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)

Frequency offset hopping for telecommunications

A frequency hopping sequence generator system (40) for use in a radio telecommunications system utilizes variable frequency offsets (FO) to determine a frequency hopping sequence for use in communication between a mobile station and a network node. The frequency hopping sequence generator comprises a frequency offset hopping generator (42) which chooses the variable frequency offsets so that the frequency hopping sequence provides intra-cell interference diversity. For each mobile station, the frequency offset hopping generator determines a frequency offset index (FOI) which is mapped to one of plural possible frequency offsets (FO). The frequency offset index (and thus the corresponding frequency offset) is determined to provide the frequency hopping sequence with both interference diversity and orthogonality. The frequency offset index has a first component and a second component. The first component of the frequency offset index is an inter-cell component that provides, e.g., collision diversity between FO hopping sequences that are not orthogonal. The second component is an intra-cell component that provides orthogonal (non-colliding) sequences with a variable difference between two sequences. The intra-cell component sub-generator can operate in either a “short sequences” mode or a “long sequences” mode. The long sequences mode renders adjacent frequency collision rates between two sequences with equal FOHSN independent of the choice of the two different FOSEEDs selected. On the other hand, the short sequences mode yields higher collision rates between certain pairs than between other pairs.
Owner:TELEFON AB LM ERICSSON (PUBL)

Measuring method for length, width and height of vehicle based on RGB-D camera

The invention discloses a measuring method for length, width and height of a vehicle based on an RGB-D camera. The method comprises the steps of acquiring a clear vehicle image in a camera short-distance mounting manner, calibrating the camera according to a calibrating method based on a disappearing point, obtaining an internal parameter and an external parameter of the camera, realizing three-dimensional point cloud conversion of a vehicle target in a world coordinate system through a camera depth image solution, and acquiring three-dimensional coordinate information of the external surfaceof the vehicle; acquiring the three-dimensional coordinate of the external surface of the vehicle by means of prior knowledge and an image processing method, splicing a vehicle image according to sequence patterns in a vehicle motion process through a registering method, and realizing three-dimensional measurement to the profile of the vehicle. The measuring method overcomes defects of high equipment requirement and tedious operation in a traditional method and realizes high calibration precision. The actual displacement of the vehicle is comprehensively analyzed through a matching relation ofpoints which correspond with the same position of the vehicle in the image sequence, thereby realizing relatively high registering precision. The measuring method further has advantages of realizingaccurate splicing of the vehicle side surfaces, reducing vehicle length measurement error and improving accuracy in splicing the vehicle side surfaces.
Owner:CHANGAN UNIV

Detection method for abnormal behaviors based on user access sequence

The invention discloses a detection method for abnormal behaviors based on a user access sequence. The detection method comprises the following steps: 1) capturing data from a local network, preprocessing the data, and performing serializing treatment on the acquired data; 2) storing a sequence formed in the step 1 into a sequence database, and generating a behavior sequence of each user on the basis of time; and 3) calculating the behavior similarity and the correlation coefficient between users according to the behavior sequence of each user, comparing the correlation coefficient for detecting the abnormal behaviors, and searching for the abnormal behaviors of the user. According to the method, on the basis of sequence pattern excavation, factors, such as, time and user behavior characteristics, are fully considered, an improved more accurate user behavior similarity algorithm is utilized to calculate, and the sequence rule of the user access is effectively extracted, so that an analysis result is more accurate and the defects of other analysis methods are overcome. Besides, on the basis of the user behavior similarity algorithm, the method has obvious advantages in noise interference, the used resources are few, and the running efficiency is high.
Owner:STATE GRID CORP OF CHINA +3
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