33results about How to "Reduce update overhead" patented technology

The embodiment of the present invention discloses a spatial keyword indexing method. The method includes: constructing a two-layer index structure according to a preset space division method; wherein, the two-layer index structure includes: a data index layer and a data storage layer, and the data The index layer is used to index data blocks stored in the data storage layer; based on the double-layer index structure, the acquired query conditions are indexed with spatial keywords to obtain index results; wherein, the query conditions include query keywords.

The invention provides a time-sensitive anomaly detection method based on the nearest neighbor in a large data flow, which belongs to the technical field of large data flow and anomaly detection. The core is a statistical estimator based on LSH sampling view, and the sliding window uses a definite The model will estimate and determine the count and variance of multiple random time intervals in the wave window to monitor the distribution of data in different time intervals. It can quickly find the neighbors of each data in a large data stream, reduce computational overhead, and do not need to separate each data Save its neighbor information, save space, improve update efficiency, and quickly judge whether the data distribution is abnormal and the time range when the abnormality occurs based on time sensitivity.

The invention relates to a family member health archive management method. The method comprises the following steps that S1) family member health information is collected; S2) the family member healthinformation is filled automatically; S3) the family member health information is stored, and the safety of the family member health information is protected; S4) health conditions of family members are evaluated, and customized information is presented in a focused way on the basis of an evaluation report; and S5) a doctor-seeing risk of a specific family member is evaluated. The method is suitable for family member health management, the cost of a synchronized update method is low, information in all mobile terminals can be updated needless of addition of control nodes, synchronization is confirmed only when there is essential update, selection is made selectively, the update cost is reduced, and the doctor-seeing risk aimed at the health condition of the specific family member can be prompted.

The present invention proposes a content source mobility support method based on active forwarding in a CCN network. The method includes: before the mobile switching of the content source, determining a new access point to which the content source moves and switches according to a preset mobile switching strategy, and Send the interest message to the original access router of the content source; after receiving the interest message, the content source forwards the data message containing the requested content to the user who requested the content provided by the content source; after receiving the interest message, the content source forwards the data message containing the requested content The content of the data message to the user. The invention overcomes the defect of communication interruption caused by content source mobile switching in the prior art, and ensures the continuity of communication in the CCN network; users can obtain the content provided after the content source mobile switching in a relatively short period of time; the content can be reduced The routing update overhead introduced by source mobility handover has better routing expansion performance and higher message forwarding efficiency.

The invention discloses a group key managing method based on Chinese remainder theorem. The method comprises the steps of: dividing a group into a plurality of subgroups, managing member subgroups by a subgroup key manager, managing SKS subgroups by a total group key manager; providing the member information for the subgroup key manager by the group members; allocating the subgroup keys to the member subgroups by the subgroup key manager, and allocating the subgroup keys of the SKS subgroups by the total key manager; after the subgroup keys are allocated, allocating the group keys by the total group key manager and the subgroup key manager; carrying out precalculation on the public data in the updating interval by the subgroup key manager, and updating the subgroup keys by the subgroup key manager after the group members are changed; after the subgroup keys are completely updated, updating the group keys by the subgroup key manager; in the whole process of the group communication, continuously updating the subgroup keys in a updating mode by the SKS subgroup based on time. The invention has the advantages of high safety, low updating cost and little updating delay, and can be usedfor large-scale group communication system.

The invention discloses an internal memory dotting-based data calling method for an acquisition system, which relates to the technical field of information. The conventional large-sized acquisition system cannot improve search efficiency and reduce system overhead at the same time. The method is characterized in that: the system is provided with a calling server; the calling server is provided with an initialization module, a dotting module and a calling module; the initialization module periodically generates a next day dotting table in an internal memory; the dotting module dots at a corresponding position of the dotting table after a front-end processor informs the calling server of the receiving of a message; and the calling module calls information in the dotting table to call miss points according to the requirement on calling time. Dotting is performed on the dotting table of the internal memory, so that updating overhead of the dotting table is lowered and dotting table inquiry speed is high. The method is suitable for calling miss points of a large-sized acquisition system.