31results about How to "Reduce the number of data transfers" patented technology

The embodiments of the present invention provide a GPS positioning method for a mobile terminal and the mobile terminal. The method comprises: after GPS positioning is initiated, acquiring a first cell identification of a first cell where a mobile terminal is located; according to the first cell identification, acquiring first longitude and latitude information corresponding to the first cell from a correlation table stored in the mobile terminal, wherein the correlation table comprises cell identifications and longitude and latitude information corresponding to the cell identifications; and performing the GPS positioning on the mobile terminal through a GPS receiver in the mobile terminal in combination with the first longitude and latitude information, pre-acquired time information and ephemeris information. In the embodiments of the present invention, when the mobile terminal performs GPS positioning, longitude and latitude information corresponding to a cell where the mobile terminal is currently located is acquired from a correlation table stored in the mobile terminal, and according to the longitude and latitude information and pre-acquired time information and ephemeris information, the GPS positioning speed of a GPS receiver can be accelerated.

The invention relates to a Markov jump based distributed event triggered filtering system and a design method thereof. The system comprises N filtering links, and is characterized in that each filtering link comprises a sensor, an event trigger, a zero-order retainer and a filter which are sequentially connected, the sensors are connected with a measured object, the filter in each filtering link further performs communication connection with the other neighbor filters, the communication topology among the N filters in the system is of a non-homogeneous Markov jump mode, the mutually connected filters perform information exchange under each type of non-homogeneous Markov link topology, and the filter in each filtering link is further connected with the corresponding event trigger in the filtering link. Compared with the prior art, the Markov jump based distributed event triggered filtering system has good anti-noise capacity, effectively reduces the number of data transmission times under the premise of ensuring the filtering performance and saves network resources.

The invention discloses a data aggregation method for increasing the capacity of a wireless sensor network. The method comprises the following steps of: homalographically clustering the wireless sensor network by using a circular grid; determining aggregated nodes of the clusters, a data aggregation mode of the network and a data transmission mode of the network; and creating a virtual node and thus acquiring a reachable throughput of the node by adopting a scheduling scheme with a load and correlation. By utilizing the method, an actual communication condition of the wireless sensor network is described by using a mode with the communication characteristic, closer to that of a sensor; and furthermore, the data transmission times in the network are reduced, therefore, the balance of the effectiveness and redundancy of information is realized, and the capacity of the wireless sensor network is increased.

The invention relates to a facilitate environmental control-oriented wireless sensor network data transmission method. The method comprises the following steps of processing the facilitate environmental data sequence acquired by a sensor by a sliding recursive method to obtain a sequence variance, detecting abnormal values in the facilitate environmental data sequence by the Letts' criterion; adaptively determining an error threshold allowable for sensor data of a facilitate environmental control system based on a parabolic equation; establishing a first-order linear regression model at a node side of the sensor and a server side and simultaneously fusing adaptive weighted algorithm in the server side to meet the condition of redundant deployment of sensor nodes to obtain fusion results of the sensor. According to the method, the data sending times of sensor nodes can be reduced to the maximum extent at a specified accuracy requirement, thereby effectively reducing the energy waste and data collisions.

The invention relates to an event trigger state estimating system based on markovian jumping. The system comprises a sensor sampling unit comprising a vehicle-mounted sensor used for collecting vehicle suspension system state information, an event trigger unit comprising an event trigger detector used for receiving measured data of the vehicle-mounted sensor on the basis of a periodic event trigger mechanism, a quantizer quantification unit comprising multiple communication links connected with the event trigger detector, connected with one another in parallel and each provided with a logarithmic quantizer, and an estimator network unit comprising estimators connected with the logarithmic quantizers on the communication links respectively used for conducting information transmission through a network. Compared with the prior art, the event trigger state estimating system based on markovian jumping has the advantages that parameters are easy to determine, the object estimating requirements are simple, network blocking is prevented, design is flexible, network resources are saved, external interference is resisted, and the like.

The invention provides a cross controller group mirror image writing method and device applied to a high-end disk array. If a received writing data request is a cross memory controller group writing data request, a data copy is generated and cached locally, then, the data copy is forwarded to a storage controller, resources required to store the data belong to the storage controller, and the storage controller where the resources belong cache the received data copy and mirror the data to a mirror image storage controller in the same group of storage controllers; and after the data mirroring is finished, the storage controller where the resources belong sends a response message to the storage controller connected with a client host. With the adoption of the method and the device, cross controller group writing data mirroring can be completed only by one-time data forwarding, so that times of data transmission are reduced, and mirroring efficiency and performance are greatly improved.

The invention discloses a video streaming media data distributing and pre-caching method based on UDP (User Datagram Protocol) broadcast. The method comprises the following steps: adding preset packet header information into each video cache data packet to be transmitted, and fusing broadcast features of wireless channel transmission; distributing and transmitting video streaming media data in a UDP broadcast-based way; and pre-caching received data packets in combination with a video data pre-caching method based on decision tree judgment. The method is used for transmitting and caching the video streaming media data in a mobile ad hoc network constructed by a smart phone through an ad-hoc mode of a wireless network card. Through adoption of the method, a data transmission frequency and a data transmission amount in the mobile ad hoc network are lowered greatly; channel collision times and local data transmission overhead during data transmission in the mobile ad hoc network are reduced; a network capacity and a data transmission efficiency of the mobile ad hoc network are increased; and a communication efficiency in the mobile ad hoc network is increased effectively.

Embodiments of the present invention provide a task processing method, system, and data processing system. The task processing system includes a central node and a plurality of processing nodes. The method includes: the central node obtains tasks to be processed; the central node obtains tasks from the storage system Obtain the data to be processed corresponding to the task to be processed; the central node splits the data to be processed into a plurality of sub-data; the central node assigns the plurality of sub-data to at least one of the processing nodes for data processing Processing: the central node merges the sub-data processed by each processing node. The present invention enables the processing nodes to obtain data directly from the central node through the setting of the central node. At the same time, since the central node has split the data, each processing node only needs to obtain the data it needs to process from the central node. Yes, the network burden is greatly reduced.

The embodiment of the invention provides a task processing method, a node and a content distribution network. The task processing method comprises the steps of, by a first type of child node, obtaining a to-be-processed task which is distributed to task processing nodes where the first type of child node is by a task scheduling node; obtaining to-be-processed data corresponding to the to-be-processed task from a storage node; dividing the to-be-processed data into multiple sub-data; distributing the multiple sub-data to at least a second type of child node of the task processing nodes where the first type of the child node is for data processing; and combining the processed sub-data of each second type of the child node of the task processing nodes where the first type of the child node is. Through the arrangement of the first type of the sub-node, the second type of the child node can obtain data directly from the first type of the child node; as the first type of the child node is subjected to data division, each second type of the child node only needs to obtain the data required to be processed by the child node per se from the first type of the child node. Therefore, the network burden is reduced.

The invention discloses a computing platform implementation method for a neural network. The computing platform reads required data from an external memory, caches the read data and the intermediate calculation result of each operation in an on-chip cache; the method comprises the following steps: reading a first part of data of a feature map required by a first operation from the external memory,executing the first operation and at least one other operation for the first part of data, and storing an operation result for the first part of data back to the external memory; reading a second part of data of the feature map required by the first operation from the external memory, executing the reading operation from the external memory, the first operation and the at least one other operation for the second part of data, and storing the operations back to the external memory. By means of the scheme, the number of times of data carrying between off-chip storage and on-chip cache can be greatly reduced, and therefore the overall processing speed is increased.

The invention provides a monitoring video processing method and device, electronic equipment and a storage medium. The method comprises the following steps of: obtaining a monitoring video by the first articulated naturality web terminal; detecting a plurality of frames of video images included in the monitoring video; sending the detected monitoring video to a storage server; caching the detectedmonitoring video by the storage server to a cache region; when the first articulated naturality web terminal detects that the frame rate in the multiple frames of video images exceeds a threshold value, starting the first articulated naturality web terminal; and outputting an alarm message and sending a video recording instruction to a storage server, reading the first part of monitoring video from the cache region by the storage server according to the video recording instruction, receiving the second part of monitoring video by the storage server, and storing the first part of monitoring video and the second part of monitoring video. According to the invention, the camera is enabled to directly realize the application of the motion detection function in the articulated naturality web, the security of monitoring video data is improved, the working efficiency of the storage server is greatly improved, and the space of the storage server is saved.

The invention discloses an evolution method of a multi-layer grid LBM with a buffer area, solving the defects that existing grid encryption is low in calculation efficiency, high in complexity and large in calculation amount are overcome. The evolution method includes the steps: recording two columns of thinned coarse grid points and thinned fine grid points at the junction of a coarse grid and afine grid, and forming grid points of a set buffer area; initializing the multi-layer grids of the buffer area, and respectively carrying out LBM evolution on grid points of the coarse grids and the fine grids until the coarse grids and the fine grids of the multi-layer grids are consistent in time; respectively carrying out spatial interpolation calculation on the coarse mesh and the fine mesh according to a set interpolation formula to obtain distribution functions of the coarse mesh and the fine mesh; and performing calculation of flow field information amount. The evolution method of a multi-layer grid LBM with a buffer area sets the buffer area at the joint of different layers of grids, so that the complexity of a calculation method and an algorithm is reduced, and the parallelism ofthe method and the precision of a calculation result are improved, and the calculation time is shortened.

The invention provides a data transmission method and apparatus for an NVRAM, and belongs to the technical field of computers. The method comprises the steps of receiving data; according to the data volume of the data, judging whether a transmission condition is met or not; and if the transmission condition is met, transmitting the data to the NVRAM. The apparatus comprises a receiving module, a judgment module and a transmission module. According to the data transmission method and apparatus, the received data are not transmitted, instead, whether the transmission condition is met or not is judged according to the data volume of the data, and if the transmission condition is met, the data are transmitted to the NVRAM; and when large amounts of concurrent small block data are subjected to writing operation, the data transmission frequency is reduced, namely, the frequency of executing a data transmission preparation stage is reduced, so that the mean time delay of data transmission is shortened and the data transmission efficiency of the NVRAM is improved.

The invention provides a wireless sensor network node fused data collection method. According to the method, a mathematic model of a variable wireless sensor network data transmission quantity is taken as the basis, characteristics of energy finiteness, communication finiteness, data redundancy and the like in a wireless sensor network actual operating procedure are considered, a data fusion method of a wireless sensor network and router selection and data transmission sequences are taken as consideration elements, compressive sensing, principal component analysis and frame potential are utilized to reduce an amount of nodes involving in data collection, and 'from top to bottom' and 'from bottom to top' algorithms define a transmission router and a transmission sequence, so that optimization on a network data transmission quantity is implemented, integral energy consumption of a network during data transmission is reduced, and precision of data reconstruction is ensured.

The invention relates to a processing device (100) comprising a buffer (102) coupled to a system bus (104), a ciphering device (106) coupled to the system bus (104), and a memory (108) coupled to theciphering device (106). The processing device (100) is configured to operate in at least one of a deciphering mode and a ciphering mode. When the processing device (100) is configured to operate in the deciphering mode, the ciphering device (106) is configured to receive a ciphered data unit directly from the buffer (102) over the system bus (104), decipher the ciphered data unit so as to obtain adeciphered data unit, and transfer the deciphered data unit to the memory (108). When the processing device (100) is configured to operate in the ciphering mode, the ciphering device (106) is configured to receive a data unit from the memory (108), cipher the data unit so as to obtain a ciphered data unit, and transfer the ciphered data unit directly to the buffer (102) over the system bus (104).Furthermore, the invention also relates to corresponding methods, a computer program, and a computer program product.