4601results about How to "Improve search efficiency" patented technology

A method and system for facilitating a keyword search request initiated at a client station within a multilevel data network, wherein the multilevel data network includes multiple local sites each containing multiple data pages. Multiple keywords from each of the data pages within the local sites of the multilevel data network are stored locally and indexed such that each of the keywords points to one or more of the data pages in which the keywords are contained. The keywords and their index associations are locally updated. A central database is utilized to compile and index the locally indexed keywords from each of the local sites, such that each of the keywords in the central database points to one or more local sites from which those keywords came in response to a keyword search initiated at the client station.

A method, apparatus and computer program product are provided for visually searching feature sets that are organized in a grid-like manner. As such, a feature set associated with a location-based grid area may be received. The location-based grid area may also be associated with the location of a device. After receiving query image features, a visual search may be performed by comparing the query image features with the feature set. The search results are then returned. By conducting the visual search within a feature set that is selected based upon the location of the device, the efficiency of the search can be enhanced and the search may potentially be performed by the device, such as a mobile device, itself.

The invention discloses a mobile robot path planning method based on an improved RRT* algorithm. The method introduces a target biasing strategy into a standard RRT* algorithm so as to reduce the randomness of sampling points; provides an avoidance step length extension method in order that a random tree can reasonably stay away from an obstacle area and avoids falling into a local minimum; and smoothes a path obtained by the improved RRT* algorithm by using a reverse sequence connection method smoothing strategy, so as to reduce the direction-changing operations of the robot and achieve the stable movement of the robot. Compared with an original standard RRT* algorithm, the improved RRT* algorithm has a better planned path and takes less time.

The invention discloses a method for providing an error correcting prompt. The method comprises the following steps of: obtaining a character string of a cursor position on a display screen; analyzing the obtained character string and judging whether the obtained character string needs processing; and supplying the prompt of the character string needing processing to a user. The invention also discloses a device for providing the error correcting prompt and an input method system. The method and the device not only can supply the error correcting prompt to characters, which are being edited by the user by using the input method, but also can supply the prompt of the character string needing processing, which is displayed on the display screen, to the user as well as supply a complementing or error correcting choice to the user so as to help the user rapidly and correctly position the character string needing processing and finish inputting and modifying a text, so an input process becomes more smooth. Since the input method has an error correcting prompt function, the dependence of the user on editing environments such as Word and the like is reduced and the character inputting quality of the user in different situations can be improved.

The invention discloses a video-based detection and recognition system and a method of vehicles. The system comprises a target characteristic database module, a moving target detection module and a vehicle recognition module. A vehicle sample target characteristic database is built to store data by virtue of the target characteristic database module. After a moving target zone is detected by the moving target detection module, the vehicle recognition module builds a search window and recognizes vehicles. The system and the method resolve the technical problems of poor vehicle distinguishing capability and low distinguishing accuracy of the video-based vehicle detection under the condition of obvious background movement, vehicle adhesion, vehicle occlusion and the like in the prior art. The video-based detection and recognition system and the method of the vehicles have the advantages of excellent vehicle distinguishing capability and high accuracy.

The invention provides a search method. The search method comprises the following steps of: S1, receiving a query command; S2, performing demand intention analysis on the query command based on a knowledge base, and defining the demand intention of the query command; S3, searching the query command carrying the demand intention in a database to obtain a search result; and S4, outputting the search result. Compared with the prior art, the search method has the advantages that: on the basis of the knowledge base, the query command input by a user is understood better; the intention of the query command is analyzed; the structure of the query command is analyzed to perform semantic content expansion on the query command so as to better guide a search engine to select quality resources to meet the search requirements on the user; therefore, the search efficiency of the user is improved and the network traffic is saved.

The invention discloses a method and a device for a Hash lookup table. When storing a table, the method comprises the following steps of: planning a main table storage space which is divided into a plurality of address spaces; establishing a plurality of Hash functions and performing Hash calculation on a keyword of a piece of information to be stored by using the plurality of Hash functions to obtain a plurality of index values; and comparing the empty/full degrees of the address spaces corresponding to the plurality of index values and storing the information to be stored in the address space with the least stored information. When looking up the table, the method comprises the following steps of: using the plurality of different established Hash functions to perform Hash calculation on the keyword to be looked up so as to obtain a plurality of index values and performing match search on the keyword of a table entry of an address space position corresponding to the plurality of index values and the key word to be looked up. The method and the device for the Hash lookup table can save storage resource for the Hash table and improve the efficiency of Hash lookup.

The invention belongs to the technical field of autonomous flight control research on a quadrotor unmanned aerial vehicle, and discloses an autonomous positioning method based on a two-dimensional laser radar as well as a design method for a quadrotor unmanned aerial vehicle control system based on the positioning method and other onboard MEMS (micro electro mechanical systems) chips. According to the technical scheme adopted by the invention, the autonomous quadrotor unmanned aerial vehicle positioning and controlling method based on the laser radar comprises the following steps: preliminarily positioning the unmanned aerial vehicle in the horizontal direction by utilizing the two-dimensional laser radar, and acquiring a preliminary position value of the unmanned aerial vehicle in the height direction by utilizing an onboard barometer; then acquiring the position information of the unmanned aerial vehicle with high frequency by combining with onboard accelerometer chips by utilizing a complementary filtering algorithm; and finally, applying to unmanned aerial vehicle control systems without GPS signals based on the position information. The autonomous quadrotor unmanned aerial vehicle positioning and controlling method based on the laser radar, which is provided by the invention, is mainly applied to design and manufacturing of autonomous flight control devices of the unmanned aerial vehicle.

The invention provides a query method and system and relates to the field of computer technology. The method comprises receiving a query word string and analyzing the speeches that the words in the query word string belong to, wherein the speeches comprises entity words, property words, property values corresponding to the property words, relative words, and relative values corresponding to the relative words; according to the speeches that the words in the query word string belong to, determining a query structure correspondingly matched with the query word string and query objects in the query structure, match-analyzing the query structure in a structuralized knowledge library to obtain object values corresponding to the query objects in the query structure; separately displaying the object values in a result area corresponding to the query word string. The query method and system can help a user to query required answers rapidly to achieve high searching efficiency; by avoiding the shortcoming of immature semantic parsing in the prior art, can precisely perform question query and answering; can also effectively answer uncommon questions.

The invention discloses a feedback method, a display method and a device for search results, and belongs to the technical field of network. The method includes the steps of receiving a search requestcarrying a search keyword and a user account identifier and determining at least two search results matched with the search keyword; obtaining a user image corresponding to the user account identifier; determining the priority of the search results according to the relevance between the attribute information of the search results and a user portrait; sending the feedback information to a terminalaccording to the priority of the search results, wherein the feedback information is used for indicating that the search results are displayed in descending order of the priority on the terminal. According to the feedback method, the display method and the device, the priority of the search results is determined according to the relevance between the attribute information of the search results andthe user portrait, so that the feedback information feed back to the terminal by a server is conformed to the user's interest preference, thus the search efficiency is improved while meeting the user's personalized needs.

The invention discloses a sparse dimension reduction-based spectral hash indexing method, which comprises the following steps: 1) extracting image low-level features of an original image by using an SIFT method; 2) clustering the image low-level features by using a K-means method, and using each cluster center as a sight word; 3) reducing the dimensions of the vectors the sight words by using a sparse component analysis method directly and making the vectors sparse; 4) resolving an Euclidean-to-Hamming space mapping function by using the characteristic equation and characteristic roots of a weighted Laplace-Beltrami operator so as to obtain a low-dimension Hamming space vector; and 5) for an image to be searched, the Hamming distance between the image to be searched and the original image in the low-dimensional Hamming space and using the Hamming distance as the image similarity computation result. In the invention, the sparse dimension reduction mode instead of a spectral has principle component analysis dimension reduction mode is adopted, so the interpretability of the result is improved; and the searching problem of the Euclidean space is mapped into the Hamming space, and the search efficiency is improved.

A database engine facing multiple tenancies and data accessing method thereof are provided. The method of the invention includes: receiving a data access request of tenancy; determining the tenancy entity corresponding to the tenancy, wherein multiple tenancy entities share one logic table in the database; processing the data access request of the tenancy according to the configuration information of the tenancy entity. The invention introduces the concept of tenancy entity to the database: a plurality of tenancy entities shares one logic table such that the development and management costs are reduced; meanwhile, every tenancy entity has independent database access account number such that the security problem of the database access is solved; when the tenancy request comes, the data access request of the tenancy is processed according to the authority of the account number of the tenancy. Due to the introduced concept of the tenancy entity in the invention, the data of the tenancy is physically separated from each other and thus it is possible to improve performance, excellent isolation and expandability; and it is possible to realize the service quality management for the tenancy at the same time.