157results about How to "Reduce update frequency" patented technology

The invention provides a cell reselection method, user equipment and network-side equipment. The cell reselection method applied to the user equipment comprises the steps of receiving system information broadcast by a cell, wherein the system information carries information of an RNA (RAN Notification Area) and/or a slice to which the cell belongs; when cell reselection is required to be performed, preferentially selecting a cell which belongs to the same RNA and/or slice to which a currently residing cell of the user equipment belongs as a target cell; and residing in the target cell. The scheme provided by the invention can enable the user equipment to preferentially select a cell which does not need to perform RNA update and/or slice update to reside as far as possible when performing cell reselection, thereby reducing the update frequency of the RNA and/or the slice, thus effectively reducing unnecessary signaling overhead generated by cell reselection, and ensuring the user experience.

The invention discloses a caching method and a caching device. The caching method comprises the steps of determining a to-be-deleted data block needing to be deleted from an NV (Non-volatile) storage medium in a caching space according to the access situation of data blocks; selecting and deleting the to-be-deleted data block from the NV storage medium according to a preset data recovery condition. According to the caching method and the caching device, which are disclosed by the invention, the writing times of an NV storage device which is unbalanced in writing and poorer in duration can be reduced, and the service life of the NV storage device can be prolonged.

A method and an apparatus for tracking an object are disclosed. The method includes determining a first position by a first tracking template and determining a second position by a second tracking template, the first and second tracking templates being formed based on first and second feature sets, respectively, the first feature set being different from the second feature set, and the first feature set and the second feature set including one or more features; and determining a final position based on the first position and the second position, wherein the first tracking template is updated for each of a predetermined number of frames, the second tracking template is updated based on a predetermined rule, the second tracking template and the first tracking template are independently updated, and the update frequency of the second tracking template is lower than the first tracking template.

The embodiment of the invention discloses a database cache management method and a database server. The method comprises the following steps of: pre-establishing a record cache for a data sheet in a database, and reading and writing data by the record cache by taking a data row as a unit; in the event of receiving a data inquiry request of a client, searching requested data in the record cache; if the searching process is failed, searching the requested data from a page cache of the database; and returning the data searched from the record cache or the page cache to the client. By utilizing the scheme, the two caches are included in the same database server, wherein the record cache is used for reading and writing data by taking the data row as the unit; the record cache can be only updated when only a small amount of hotspot data is changed, therefore, the cache utilization rate of the database server is increased; and the cache updating frequency is reduced.

A network-based emergency call device for a vehicle. A first connection between the vehicle and a server is firmly prescribed as a permanent IP connection. This connection is used to send an emergency call, together with the necessary emergency call data to the server. The latter forwards the emergency to all the registered assistance units via further connections directly and without human action. The assistance unit providing assistance is selected automatically by taking the emergency call by an assistance unit. The subsequent setup of a communication link between the assistance unit taking the call and the vehicle involves the use of the already existing IP connection between the vehicle and the server for the communication link which is to be set up. The data to be transmitted and the data rate can also be customized to the current situation of the vehicle and to the surroundings of the vehicle.

The invention discloses a data deduplication system with ownership management for cloud ciphertext storage and a data deduplication method thereof. The method includes the steps of installation, datauploading, file level ownership management, data block level ownership management, and data downloading. The scheme of the invention supports deduplication of cross-user file level data and deduplication of single-user data block level data, has security and high efficiency, and can resist pollution attacks and data forgery attacks for the deduplication of the cross-user file level data. In addition, a delayed update strategy in the invention can reduce the data update frequency of the deduplication of the cross-user file level data and reduce the computation overhead of the system while ensuring the forward and backward confidentiality; and a user-assisted convergence encryption method of the invention can implement the deduplication of the single-user data block level data.

The invention discloses a semantic high-precision map construction method based on dot-line feature fusion laser, which comprises the following steps: 1) performing semantic segmentation and feature extraction on a visual image acquired by a camera to obtain a visual image containing semantic categories and dot-line features, and then obtaining a foreground and a background of a moving target; 2)projecting the laser three-dimensional point cloud acquired by the laser radar onto a visual image plane, fitting to obtain a depth map, and endowing the laser three-dimensional point cloud with semantic categories and dot line features; 3) performing super-pixel segmentation on the moving target, calculating the distance between super-pixel blocks, constructing a graph model, performing image segmentation, and accurately extracting the boundary of the moving target; and 4) removing the visual feature points and the laser three-dimensional points belonging to the moving target to construct a static high-precision semantic three-dimensional map. The invention further discloses athe positioning method of the semantic high-precision map constructed by adopting the method, and the mapping is more accurate and reliable by accurately removing the moving target.

The invention belongs to the field of event-triggered control design, and discloses an event-triggered control design method for a switching system with actuator saturation. In order to reduce the sampling times of the system and save network resources effectively, the event-triggered control design method applies an event-triggered strategy to the switching system with actuator saturation and ensures the stability of a closed-loop system adopting event-triggered control. The event-triggered control design method specifically comprises the steps of: step 1, establishing the switching system with actuator saturation; step 2, designing a trigger condition, and determining a trigger moment t<e><k>; step 3, designing conditions for the closed-loop system; step 4, designing preconditions in order to meet establishment of the conditions; step 5, and designing conditions to obtain a result that exponents of the closed-loop system are stable. The event-triggered control design method is mainlyapplied to the event-triggered control occasions.

The invention belongs to the field of controller design, aims at decreasing sampling points of an extended state observer, effectively saving network bandwidth resources, reducing network communication pressure and meanwhile ensuring the performance and stability of a closed-loop system adopting active disturbance rejection control, applies an event trigger mechanism to controller design and provides a nonlinear system event trigger controller designing method based on the extended state observer.The nonlinear system event trigger controller designing method specifically comprises the following steps that step 1, a single-input single-output nonlinear system model (shown in the description) is established; step 2, for estimating a state of the system and an extended state defined in the step (2), the extended state observer is designed; step 3, a sampling moment ti is determined; step 4, the state, sampled at the sampling moment ti, of the extended state observer is transmitted to the controller.The nonlinear system event trigger controller designing method is mainly applied to controller design occasions.

The invention discloses a multi-agent consistency method based on distributed adaptive event triggering. The method provided by the invention is an improved method of an existing method, and the method comprises the steps: 1) simplifying an updating step of a multi-agent control system controller protocol; 2) only updating each intelligent agent at the triggering moment of the intelligent agent, so the updating frequency of event triggering control is effectively reduced; 3) considering the influence of uncertain factors in the multi-agent control system, and proposing an event trigger-based adaptive control strategy to overcome. According to the method, complex exponential operation, acquisition of global coordinate information and complex data fusion operation are not needed, and the triggering of the event is relatively independent and only depends on the triggering moment of the event and the relative state of the neighbor node. Meanwhile, the introduction of the adaptive parameterestimation method realizes the self-estimation and self-optimization of the parameters of the multi-agent control system, and overcomes the defect that the parameter estimation depends on the uncertainty of global information during the design of the multi-agent control system.

The invention provides a data processing method, comprising the steps of: a receiver and a sender generating a key pool through negotiation, and determining a same pseudo random number generator; the sender operating the pseudo random number generator to obtain a pseudo random number, selecting a key from the key pool according to the pseudo random number, encrypting a current data set to be sent by the key, and sending an encrypted data set to the receiver; and the receiver operating the pseudo random number generator in a same mode with the sender to obtain a pseudo random number, selecting a corresponding key from the key pool in a same mode with the sender according to the pseudo random number, and deciphering the encrypted data set by the corresponding key. The invention also provides a data processing system. The data processing method and system solve the problem of low key service efficiency in a data processing process of the prior art, and reduce a key updating frequency.

The invention discloses a learning target tracking algorithm based on a twin network. The method comprises the following steps: 1, setting a function f to compare the feature map similarity of a template image x and a candidate image y, the maximum response value corresponding to a target position, the x being generally an image with a target as the center in a first frame, and the y being an image searched by taking an (n-1) th frame of image target as the center in an nth frame; substituting the two inputs into a convolutional neural network, learning a network parameter rho by using a convolution processing function, generating two cross-correlation mappings, and performing exhaustive search on x at y to respond to the position of a target corresponding to the maximum value; wherein animproved discriminant correlation filter layer is added between input x and cross-correlation operation in the twin network, 3, performing tracking by measuring the similarity between a template imagex and a search image y, and online fine adjustment is carried out by means of a discriminant correlation filter module during online tracking so as to ensure the tracking accuracy.

The invention provides a method for updating and displaying a navigation route of a real-time traffic status and a navigation server. The method comprises the following steps of: calculating the running distance of a mobile terminal which runs for a first preset period of time according to an acquired current optimal route; calculating a second period of time needed by the mobile terminal for running by the running distance according to the acquired current displayed route; and when the difference between the second period of time and the first preset period of time is more than a preset threshold, transmitting the current optimal route to the mobile terminal to update a current displayed route into a current optimal route by using the mobile terminal. Due to the adoption of the method for updating and displaying the navigation route of the real-time traffic status and the navigation server, the displayed navigation route is updated only when the current optimal route is remarkably superior to the current displayed route, the updating frequency of the navigation route is lowered, and valuable communication resource is saved.

The invention discloses buffering and overtime processing methods of route address mapping information as well as a tunnel router, in order to reduce the updating frequency of the route address mapping information in an ITR (ingress tunnel router) buffer and reduce the data packet forwarding of a DM (default mapper). The buffering method of the route address mapping information comprises the following steps: mapping information records comprising route address mapping information and the number of use of the route address mapping information are buffered in the ITR; and after the route address mapping information transmitted by the DM is received, the received route address mapping information is added into the buffer according to the number of use in the buffered mapping information records. According to the invention, the forwarding paths of data packets are optimized, and the end-to-end data transfer delay can be reduced.

The invention relates to an event-trigger-based output feedback controller of a neutral stable saturation system. The design method comprises: establishing a model for a neutral stable linear system with output saturation characteristics; designing an output feedback control based on a state observer; determining a sampling time; providing models of an observer system and an observation error system under the event trigger action; providing stability conditions of the system; and providing a minimum time interval for event triggering to avoid the Zeno phenomenon in the control process.

The invention discloses a system power failure protection realizing method for a NAND FLASH. The method comprises following steps: 1, carrying out mapping management to all blocks in the NAND FLASH through a first level stable, a second level table and a third level table; 2, electrifying a system, loading the first level stable, the second level table and the third level table, recovering the system to a working state; 3, judging whether an abnormal power failure is generated in a data updating process according to the data in the tables; and 4, when the information stored in the NAND FLASH changes, updating the first level stable, the second level table and the third level table. According to the method of the invention, after the new first level stable, the new second level table or the new third level table is written successfully, the original first level stable, the original new second level table or the original new third level table is erased; the tables are located in a searchable address range; therefore, after the system is electrified again after the power failure, the system stores the data in the tables completely; and the system state can be recovered according to the data in the tables.

A method of compressing short text messages, comprising: generating an index code comprising an association of keywords in the text messages with indices, the index code is logically divided into segments of variable size, each segment comprising at least one bucket, being a constant range of indices; adjusting the index code according to a natural keyword frequency distribution and to statistical analysis of the text messages; associating short indices with frequent keywords in the text messages; converting the text messages into compressed text messages in which at least some of the keywords are replaced by the associated indices; and updating the association between the indices and the keywords, updating the segments, and updating the updating frequency in respect to a usage keyword frequency distribution and temporal changes thereof

A method of operating a memory system includes storing data received from an external device in a buffer memory of the memory system, programming the data stored in the buffer memory to a first storage area of a nonvolatile memory of the memory system in response to a mode of the memory system being in a guarantee mode and to a second storage area of the nonvolatile memory in response to the mode of the memory system being in other than the guarantee mode, and programming the data stored in the first storage area to the second storage area during an idle time.

The invention discloses a 1-hop and 2-hop clusters coexistent adaptive clustering method based on density estimation in VANETs. The method comprises the following steps: estimating the 1-hop neighbor node density in the future time, as the formula, based on the current position and current speed of a node, comparing the 1-hop neighbor node density with a threshold, and judging whether the node is suitable to form the 1-hop cluster or the 2-hop cluster, and initializing the node as a cluster head node; in each cluster, selecting a node with the minimum relative mobility, that is the formula is the minimum, as a cluster head, reducing other nodes in the cluster to cluster members, and if there are two or multiple nodes with the minimum relative mobility, then selecting a node with the minimum ID as the cluster head; and performing post maintenance of a cluster structure based on the possible situations in the network. A clustering algorithm disclosed by the invention has the advantages of being low in delay and low in packet loss.

The invention provides a method and apparatus for determining an interactive result, an electronic device, and a storage medium. The method comprises the following steps: receiving a bullet screen message sent by a live broadcast client; if identification characters are identified from the bullet screen message, matching the bullet screen message corresponding to the identification characters withanswer data corresponding to an interactive task; and outputting a matching result. By adoption of the method provided by the invention, a user can participate in the interactive task without upgrading or updating the original live broadcast client, thereby reducing the frequency of upgrading and updating the live broadcast client and reducing the cost of artificial code-compiling; and moreover,the interactive bullet screen message input by the user is not in a fixed format, so that the user experience is better.