158results 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 system for optimizing bandwidth usage in remote visualization are provided. The method may comprise determining a region of interest and a region of non-interest of the image; sending data relating to the region of interest via a reliable priority data stream; and sending data relating to the region of non-interest via a less reliable non-priority data stream. The priority data stream may be a high quality and / or high speed data stream, while the non-priority data stream may be a lower quality and / or lower speed data stream. The region of interest and the region of non-interest may be determined in various ways, including via automatic selection (e.g., through the use of image-based algorithms), via an application programming interface of one of a plurality of graphics applications that generate the image, or via manual selection by a user.

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 method and system for optimizing bandwidth usage in remote visualization are provided. The method may comprise determining a region of interest and a region of non-interest of the image; sending data relating to the region of interest via a reliable priority data stream; and sending data relating to the region of non-interest via a less reliable non-priority data stream. The priority data stream may be a high quality and / or high speed data stream, while the non-priority data stream may be a lower quality and / or lower speed data stream. The region of interest and the region of non-interest may be determined in various ways, including via automatic selection (e.g., through the use of image-based algorithms), via an application programming interface of one of a plurality of graphics applications that generate the image, or via manual selection by a user.

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.

A tracking device includes: a first tracking control unit that tracks an object based upon focus adjustment states that are detected by a focus detection unit in a plurality of focus detection positions; a second tracking control unit that tracks the object based upon image information that is outputted by an image-capturing unit and reference image information that has been set as a reference; a setting unit that sets a degree to which focus adjustment based upon a focus adjustment state detected by the focus detection unit is temporarily prohibited; and a control unit that selects one of the first tracking control unit and the second tracking control unit to be used for tracking the object, based upon the degree that has been set by the setting unit.

The invention discloses a network multi-area electric power system load frequency control method based on a self-adaptive event trigger mechanism. The efficient self-adaptive event trigger mechanism is introduced to the conventional multi-area electric power system load frequency control, thereby reducing unnecessary data transmission while guaranteeing that the system obtains expected control performance, and saving limited network communication resources. According to the method, a network area control error (ACE)-dependent electric power system load frequency control delay model is established; and a convex combination analysis method is utilized in the process of carrying out system stability analysis and synthesis, thereby preventing the problem of introducing too many free-weighting matrixes in a conventional method, reducing operation time greatly and improving control and operation efficiency. The method enables the communication and control efficiencies of the multi-area electric power system load frequency control to be improved obviously.

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 mixed-experience multi-agent reinforcement learning motion planning method, namely an ME-MADDPG algorithm. According to the method, through MADDPG algorithm training, when a sample is generated, experience is generated through exploration and learning, high-quality experience of successfully planning multiple unmanned aerial vehicles to a target through an artificial potential field method is added, and the two kinds of experience are stored in different experience pools. During training, a neural network collects samples from the two experience pools through dynamic sampling according to the changing probability, state information and environment information of the agents serve as input of the neural network, and the speeds of the multiple agents serve as output. Meanwhile, the neural network is slowly updated in the training process, the training of a multi-agent motion planning strategy is stably completed, and finally, the agents autonomously avoid obstacles in a complex environment and can smoothly reach the respective target positions. According to the method, a motion planning strategy with better stability and adaptability can be efficiently trained in a complex dynamic environment.

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 baseband signal frequency domain narrowband interference detection elimination apparatus and a method thereof. The method comprises the following steps that an intermediate frequency signal is divided into two paths and is output to a narrowband interference detector and a narrowband interference eliminator respectively; the narrowband interference detector carries out interference detection on one path of the received intermediate frequency signal so as to obtain interference detection information and sends the information to the narrowband interference eliminator. The narrowband interference eliminator carries out narrowband interference elimination processing on the other path of the received intermediate frequency signal according to the interference detection information. By using the narrowband interference detector provided in the invention, whether narrowband interference exists can be detected and index information of an interference frequency point can be provided so that the narrowband interference eliminator only carries out frequency domain filtering on the frequency point with interference. By using the apparatus and the method in the invention, a good narrowband interference restraining effect is possessed, system power consumption can be reduced and high practicality is possessed.

The embodiment of the invention provides an IP addressing method and apparatus of a polar-orbit low-orbit satellite network. The IP addressing method provided by the embodiment of the invention comprises the following steps: dividing an earth surface into a plurality of geographical zones according to a distribution rule of satellite nodes, allocating fixed IP address segments to the geographical zones, allocating IP addresses to ground ports of the satellite nodes according to the geographical zones corresponding to the satellite nodes, and allocating IP addresses to mobile users according to the geographical zones of the mobile users. Moreover, only when the mobile users span the geographical zones, the IP addresses of the mobile users are updated. Since the moving speeds of the mobile users relative to the geographical zones are much smaller than the moving speeds of the mobile users relative to the satellite nodes, the frequency of the mobile users to span the geographical zones is much smaller than the frequency of the mobile users to convert the coverage of the satellite nodes, therefore by adoption of the IP addressing method and apparatus of the polar-orbit low-orbit satellite network provided by the embodiment of the invention, the frequency of updating the IP addresses of the mobile users is greatly reduced, and thus the operating efficiency of the satellite network is improved.

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.

A geomagnetic sensor for detecting geomagnetism is provided in a mobile terminal device. The output value of the geomagnetic sensor is compared with a first set value that has been set in advance, and the mobile terminal device is determined to be stationary when the output value of the geomagnetic sensor continues to be smaller than a first set value for at least a first set time period that has been set in advance, and the mobile terminal device is determined to be moving when the output value of the geomagnetic sensor fluctuates by at least the first set value. The determination results are transmitted to the base station, and the base station decreases the number of times for executing a process of registering the position of the mobile terminal device to the base station when the mobile terminal device is stationary, and increases the number of times of executing the process for registering position when the mobile terminal device is moving.

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

The invention provides a conference list subscription and notification method based on a SIP, which comprises the steps that: S1, firstly, a user logs in a video conference system by a WEB browser andcarries out a conference list subscription request; S2, the conference list subscription request is forwarded to a subscription server of a video conference system through a proxy server; and S3, thesubscription server of the video conference system forwards a conference list notification of the user to the user through the proxy server, wherein a conference list is notified by a conference-listevent packet of an XML file, the event packet only includes configuration information of conferences and allows the user to subscribe conference list information, both a notifier and a subscriber need to support an application / conference-list+xml data format, and a root element of the XML file is <conference-list>. according to the method provided by the invention, in the premise of ensuring integrity and readability of the conference list information, efficiency of transmitting useful information is improved, and a great quantity of server resources are saved.

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.

The invention discloses an Internet of Things intelligent vase. The Internet of Things intelligent vase comprises a vase body, a base, an intelligent controller, a communication module, a protecting layer, a decorating layer, atmosphere lamps, lighting lamps, a loudspeaker, an LED digital clock and a power line. The base is arranged below the vase body, the intelligent controller is arranged inside the vase body, the communication module is arranged below the vase body, the protecting layer is arranged inside the vase body, the decorating layer is arranged outside the vase body, the atmosphere lamps are arranged inside the decorating layer, the lighting lamps are arranged on the upper portion of the vase body, the loudspeaker is arranged on the base, the LED digital clock is arranged in the decorating layer, and the power line is arranged on the base. An air detection and purification unit, an intelligent home gateway, an intelligent home sensing module and an intelligent lighting module are arranged in the intelligent controller. The Internet of Things intelligent vase can achieve the functions of indoor environment detection, air filtration, weather acquisition, lighting control and indoor decoration, is high in intelligent degree and multifunctional and can improve the indoor decoration effect and the life quality.