46results about How to "Reduce read volume" patented technology

The invention provides a rapid data recovery method and system based on crossed code correction and deletion. The method comprises the steps that calculation is performed according to an LRC encoding mode when data is written in, global encoding blocks are grouped in pairs, the global encoding blocks in each group are divided into two parts, after being subjected to exclusive-or operation, the second half part of one global encoding block and the first half part of the other global encoding block are written into the second half part of the current global encoding block, when the first global encoding block is lost, the second half part of the data block is read, the two second half parts, obtained before the exclusive-or operation is performed, of the lost data block are obtained, the first half part of the lost data block is obtained after the second half part, obtained after exclusive-or operation is performed, of the other global encoding block is subjected to exclusive-or operation, the data obtained before exclusive-or operation of the lost data block and the first half part of the other global encoding block are subjected to exclusive-or operation to obtain the second half part of the lost data block; the data is brushed back to a corresponding magnetic disk in a stripe mode to be stored, and after the data is written into a storage server, asynchronization longitudinal encoding calculation is performed.

The invention discloses an inertial navigation system alignment accuracy evaluation method. The method comprises the following steps: with differential GPS speed as external reference base, constructing an inertial navigation system alignment accuracy evaluation observation quantity, and performing extended Kalman filter calculation in combination with an inertial navigation system alignment accuracy evaluation nonlinear model; after each extended Kalman filter calculation cycle, inserting the calculation of an extended fixed-interval smoothing gain matrix, and storing the filter data in real time until the filter calculation is over; and performing reverse extended fixed-interval smoothing calculation by use of the stored filter data, and estimating the attitude misalignment angle at the moment when the inertial navigation system alignment is over to realize evaluation of the inertial navigation system alignment accuracy. The method can realize inertial navigation system alignment accuracy evaluation in the conditions of large azimuth misalignment angle and small misalignment angle, and has the advantages of strong robustness, small data storage capacity and high calculation efficiency.

The invention provides a monitoring video storage method and system. The storage method comprises the following steps: receiving request information for storing a monitoring video, wherein the requestinformation carries the monitoring video and a plurality of identifier information of the monitoring video; respectively setting the monitoring video and a storage path of a key frame in the monitoring video, and combining all identifier information of the monitoring video to save metadata as each subdata in the metadata of the monitoring video; saving the monitoring video according to the storage path of the monitoring video recorded in the metadata; and extracting the key frame in the monitoring video, and saving the key frame according to the storage path of the key frame recorded in the metadata, so that users can find the monitoring video according to the metadata. The monitoring video storage method provided by the invention can greatly reduce the reading amount of the monitoring video, and effectively improve the query efficiency.

The invention relates to a mass video data storage system, belongs to the data storage field and is to solve a problem of optimizing the performance of an existing massive video data distributed storage system. The mass video data storage system comprises a storage server cluster, the use condition is periodically fed back to a state manager through a heartbeat protocol, a client initiates a datastorage request to the state manager, the state manager receives a data storage request initiated by the client, allocates storage tasks to the storage server cluster according to the feedback condition, idle storage servers of the storage server cluster receive the storage tasks, and the client performs data writing operation on a video stream through the SSD and the disk bound with a virtual machine file system in the storage server, and the state manager periodically performs space recovery on the expired data of the storage server cluster, so the effect of optimizing the performance of theexisting massive video data distributed storage system is achieved.

The present invention provides a method for data reconstruction of a disk array, and a disk array system. The method comprises: S1. determining original data of a current strip fragment in a source faulty disk is unreadable, and if yes, performing step S2, and if no, performing step S3; S2. determining a relevant strip fragment that belongs to the same strip as the current strip fragment, obtaining data of the relevant strip fragment, and reconstructing the original data of the current strip fragment according to the data of the relevant strip fragment, to obtain reconstructed data corresponding to the current strip fragment; and S3. reading the original data of the current strip fragment, and using the original data as reconstructed data corresponding to the current strip fragment. According to the method for the data reconstruction of the disk array and the disk array system provided by the present invention, the efficiency of the data reconstruction can be improved.

The invention relates to a paging multi-level displaying method based on a three-dimensional digital city system model. The paging multi-level displaying method includes the following steps that (1), a three-dimensional model is established by the utilization of a computer, a computer graphic display card, a digital camera and a stereoscopic image measurement instrument through a three-dimensional frame which is used for mutually collecting geographic information three-dimensional objects, and then three-dimensional model maps obtained through the digital camera are attached to the three-dimensional model to generate a three-dimensional digital city system; (2), monomer models in the three-dimensional digital city system are divided into three levels according to geographic on-site distances from a viewpoint to the centers of the monomer models; the first level is a fine display model, the second level is a common display model and the third level is a rough display model; (3), a call rule is formulated among the fine display model, the common display model and the rough display model in the step two. A mass of the monomer models in the three-dimensional mode can be rapidly displayed, time is short, efficiency is high and requirements for hardware are low.

The invention provides an image prediction method and device. The method comprises the steps of obtaining prediction motion information of an image block; determining an initial prediction block of the image block according to the prediction motion information and a reference image of the image block; carrying out L times of iterative search in the reference image according to the prediction motion information and a whole pixel step length to obtain an intermediate prediction block of the image block, where L is a preset value and L is an integer greater than 1; carrying out single search in the reference image according to the sub-pixel step length to obtain M prediction blocks of the image block, where M is a preset value and M is an integer greater than 1; and determining a target prediction block of the image block according to the M prediction blocks and the intermediate prediction block.and obtaining a predicted value of the pixel value of the image block according to the pixel value of the target prediction block. According to the invention, the data reading amount during image prediction can be reduced.

The invention relates to an accelerating method for a two-dimensional map library. The method comprises steps as follows: 1) map data are read; 2) an index data model of multiple layers of grids with graded elements is established; 3) required grids are selected according to the range of map data displayed in a screen; 4) the map data in the selected grids are clipped according to the screen display range; 5) the distance between two points of the clipped map data is judged, and a point with the value smaller than a fixed value is discarded; 6) a display map is drawn. By means of the method, the display speed of maps can be increased.

The invention provides a method and device for rapidly editing an object. The method comprises the following steps of: leading a template file created by bottom-layer software and writing the attribute information of the object in the template file into a memory; presenting the object in a rapid editing window according to the attribute information; receiving the editing operation of a user on the object in the rapid editing window; and updating the attribute information in the memory according to the attribute of the object in the rapid editing window. By adopting the invention, the user can realize the rapid editing of simple attribute of the object just on the secondary software corresponding to the bottom-layer software without starting the bottom-layer software, thereby preventing time consumption caused by loading various complex functions of object editing when the bottom-layer software is started and improving the editing speed and the stability of a system.

The invention provides a time series data storage method based on a multilayer column-type storage structure. The method comprises the steps that all time series data to be stored is stored in a file,wherein the file comprises a first part and a second part; acquisition time of each piece of time series data to be stored and a data value of each piece of time series data to be stored are stored in the first part; the first part is divided into multiple row sets; each row set is divided into multiple column sets; the number of all the row sets, the offset amount of each row set in the file, the number of all the column sets in each row set, an attribute value of each piece of time series data and the offset amount of each column set in the file are used as the second part. According to thetime series data storage method, the time series data is organized according to the columns, the data of the same column in the same row set is continuously stored in the file, queried data is located at the close positions in the file accordingly, the amount of reading the time series data during query can be reduced, the query speed is increased, and the IO performance of a disk is improved.

The invention provides a serial port caching control method, a controller and a microcontroller system thereof. The serial port caching controller comprises L label address rows, wherein each label address row comprises a block label of an M bit and an effective bit zone label of an N bit; the block label of the M bit is used for recording an address zone of T byte data stored in an internal caching memory, the effective bit zone label of the N bit is used for recording effective bit zones in the address zone, wherein the size of each effective bit zone is T / N byte. The serial port caching controller needs to read T / N byte data from an external memory to the internal caching memory every time without reading the T byte data of the whole address zone. Because the T byte data of the whole address zone can not necessarily be read by a microcontroller, the waiting time of the microcontroller can be shortened so that the executing speed is raised.

The embodiment of the invention provides a video coding method which solves the problem that in the prior art, reference picture data of the whole motion searching region need to be repeatedly read from reference frame images, and therefore the requirement for the bandwidth of a memory is too high. According to the method, coding is carried out on macro blocks in images to be coded according to the line scanning sequence, and the coding process of one macro block comprises the steps that whether a macro block adjacent to the current macro block is located at the same ROI region / background region with the current macro block is judged, and the current macro block is coded according to the judging result of the adjacent macro block.

The invention discloses a method and a device for realizing a distributed lock. The invention relates to a cloud computing technology, which solves the problem of waste of resources caused by the needto read all shared storage space every time. The method comprises the following steps of: acquiring a surviving node in a current lock space; reading an I / O block corresponding to the surviving nodein the shared storage. The technical proposal provided by the invention is applicable to a large-scale cluster operation platform, and realizes the distributed lock with high efficiency and high resource utilization rate.

The invention discloses a non-interlaced voice data reading method and a non-interlaced voice data reading device and relates to the technical field of streaming media. The non-interlaced voice data reading method comprises the steps of intercepting original instructions for reading transport stream (TS) file data blocks; finding data pack information corresponding to video frame numbers in original files according to the video frame numbers in the original instructions; extracting video frame information required corresponding to the video frame number requirements according to the data pack information of the video frame numbers; generating minimum voice data reading instructions according to video frame information and reading video frame data according to the minimum voice data reading instructions; and using the video frame data as video data of the original instructions to be returned. Only the video data are read, other invalid data are not read, data reading amount is decreased greatly, and system resources are saved accordingly. Especially, a plurality of bandwidth resources are saved under the network environment, and system load is reduced.

The invention discloses a grouping management mapping reverse lookup table rapid reconstruction method and device, equipment and a medium. The method comprises the steps: grouping the data pages of data blocks of a solid state disk ; writing a mapping reverse lookup table into the last data page of each group; judging whether the solid state disk needs abnormal power failure recovery or not; if so, searching a conflict data block; judging whether the conflict data block is an open data block or a full data block; if the mapping reverse lookup table is the open data block, reading all the datapages which are completely written into the mapping reverse lookup table and store the mapping reverse lookup table and the data pages which are not written into the mapping reverse lookup table in the group. According to the method, the data pages of the data block are grouped, and the mapping reverse lookup table is established for each group, so the reading amount of the data pages during opendata block data recovery can be reduced, the old and new mapping relationships can be quickly determined, and the mapping table is updated, and the data recovery efficiency is effectively improved.

The invention discloses a retrieval device, a terminal and a retrieval method. The retrieval device comprises an acquiring unit, a screening unit and a retrieval result confirming unit, wherein the acquiring unit is used for receiving an input retrieval item and acquiring documents which comprise the retrieval item, the screening unit is used for counting a predicted weight value of each document, screening a preset number of primary documents from the documents with the retrieval item according to the predicted weight values, and the retrieval result confirming unit is used for reading position data of the retrieval item in each primary document, calculating a position relevancy according to the position data, and using the primary document of which the position relevancy satisfies the preset condition as a retrieval result. The retrieval device, the terminal and the retrieval method predicate the intermediate retrieval result according to the document characteristics and only read the position data and calculate the position relevancy of the part with good predicated result, and accordingly the position data reading amount and calculating amount are greatly reduced, and the retrieval speed is improved.

The present invention relates to the technical field of image processing, and the present invention provides an image generation method and system based on oblique grid data. The two-dimensional grid of the inclined grid data is divided into blocks, the large area of ​​data corresponding to the large-scale picture is divided into multiple small areas, and the picture data corresponding to the small areas is loaded in sequence; The data association relationship of a large area is spliced ​​to the picture data corresponding to the small area to obtain a large-scale image. The invention can effectively reduce the amount of data read through the two-dimensional grid division of the inclined grid data and the conversion and splicing of the small area data, which not only realizes the rapid loading of large-scale images, but also improves the output quality. Image quality for large scale images.

The invention discloses an inertial navigation system alignment accuracy evaluation method. The method comprises the following steps: with differential GPS speed as external reference base, constructing an inertial navigation system alignment accuracy evaluation observation quantity, and performing extended Kalman filter calculation in combination with an inertial navigation system alignment accuracy evaluation nonlinear model; after each extended Kalman filter calculation cycle, inserting the calculation of an extended fixed-interval smoothing gain matrix, and storing the filter data in real time until the filter calculation is over; and performing reverse extended fixed-interval smoothing calculation by use of the stored filter data, and estimating the attitude misalignment angle at the moment when the inertial navigation system alignment is over to realize evaluation of the inertial navigation system alignment accuracy. The method can realize inertial navigation system alignment accuracy evaluation in the conditions of large azimuth misalignment angle and small misalignment angle, and has the advantages of strong robustness, small data storage capacity and high calculation efficiency.

The invention provides a method and device for rapidly editing an object. The method comprises the following steps of: leading a template file created by bottom-layer software and writing the attribute information of the object in the template file into a memory; presenting the object in a rapid editing window according to the attribute information; receiving the editing operation of a user on the object in the rapid editing window; and updating the attribute information in the memory according to the attribute of the object in the rapid editing window. By adopting the invention, the user can realize the rapid editing of simple attribute of the object just on the secondary software corresponding to the bottom-layer software without starting the bottom-layer software, thereby preventing time consumption caused by loading various complex functions of object editing when the bottom-layer software is started and improving the editing speed and the stability of a system.

The invention relates to the technical field of vector data reading and visualization, in particular to a vector data reading method and system, and a vector data visualization method and system. The reading method comprises the following steps that: according to a minimum pixel displayed on a screen, calculating a logic size corresponding to data inquired under different display proportional scales to obtain data which is displayed in a display range which needs to be read in a spatial database; traversing each simple element of the obtained data, and establishing a cache; and establishing an intersectant grid index for the established data. By use of the vector data reading method and system and the vector data visualization method and system, the data is filtered to effectively reduce a data reading amount, and initial caching data is created in a memory database in a deployment environment to improve a query hit rate and reduce the pulling of server data.

The invention discloses an intravascular ultrasound image construction method and device, intravascular ultrasound equipment and a computer readable storage medium. The method comprises the steps: acquiring line data in each frame of the cross section image of an intravascular ultrasound image, and processing the line data into to-be-displayed line data; storing the to-be-displayed line data and acorresponding longitudinal section identifier according to the longitudinal section corresponding to the to-be-displayed line data and a preset data structure; and reading target to-be-displayed linedata corresponding to a target longitudinal section identifier according to a received section display command, and displaying the target to-be-displayed line data as a target longitudinal section image. Therefore, according to the construction method of the intravascular ultrasound image, the construction efficiency of the intravascular longitudinal section image is improved.

The invention relates to a mass model data browsing method based on a three-dimensional digital city system. The method includes the first step of generating a geographic information mass three-dimensional model, and the second step of calculating rapid lookup units within a geographic coordinate range according to the geographic coordinate range in a three-dimensional digital city system window, finding out required three-dimensional monomer models from the rapid lookup units, finding out the required three-dimensional monomer models in a database, calculating the distances between a viewpoint and centers of the three-dimensional monomer models, loading models at corresponding levels in the database into a memorizer according to the distances, finding out invisible parts of the models through calculation of model data at classified levels and releasing the invisible parts of the models out of the memorizer, placing visible parts of the models into a graphic drawing pipeline of a graphics card, and finally displaying the visible parts of the models in the three-dimensional digital city system. According to the mass model data browsing method based on the three-dimensional digital city system, the monomer models in the mass three-dimensional model can be rapidly displayed, the time is short, the efficiency is high, and the requirement for hardware is low.

The invention provides a vehicle routing planning method capable of avoiding road restrictions. The vehicle routing planning method includes: inputting a destination, performing road network matching to determine a starting point set and a destination set, determining a road network expansion range and the final expansion tier, performing tier rising when a tier rising condition is satisfied, performing top tier bidirectional expansion, and backtracking routes to generate an optimal route. The vehicle routing planning method has the advantages that the complete route for navigation and displaying can be achieved; the expansion range is determined reasonably, data reading amount is lowered, internal memory consumption is lowered, file reading times are reduced, and the requirements of users using low-performance WINCE equipment can be satisfied; by the different processing of prohibition constraint data and restriction constraint data, roads closed to traffic can be avoided, the cost of restricted roads can be considered, and the route satisfying the requirements of the users can be planned.

The invention provides a rapid data recovery method and system based on crossed code correction and deletion. The method comprises the steps that calculation is performed according to an LRC encoding mode when data is written in, global encoding blocks are grouped in pairs, the global encoding blocks in each group are divided into two parts, after being subjected to exclusive-or operation, the second half part of one global encoding block and the first half part of the other global encoding block are written into the second half part of the current global encoding block, when the first global encoding block is lost, the second half part of the data block is read, the two second half parts, obtained before the exclusive-or operation is performed, of the lost data block are obtained, the first half part of the lost data block is obtained after the second half part, obtained after exclusive-or operation is performed, of the other global encoding block is subjected to exclusive-or operation, the data obtained before exclusive-or operation of the lost data block and the first half part of the other global encoding block are subjected to exclusive-or operation to obtain the second half part of the lost data block; the data is brushed back to a corresponding magnetic disk in a stripe mode to be stored, and after the data is written into a storage server, asynchronization longitudinal encoding calculation is performed.