3369results about How to "Improve query efficiency" patented technology

Embodiments include a method, apparatus, program, and system for distributing data items among a plurality of data storage units, the data items being an aggregation of data from a plurality of data sources. The method comprises generating a semantic description of each of the plurality of data sources; calculating, for each pair of data sources from among the plurality of data sources, a degree of similarity between the semantic descriptions of the pair of data sources; and allocating data items to data storage units in dependence upon the calculated degree of similarity between the data source of a data item being allocated and the or each data source of data items already allocated to the data storage units.

The present invention discloses a digital transaction system, and an account information query method therefor. The digital transaction system comprises verification nodes configured to store latest account information and latest blocks including latest transaction information and latest account indication information in block chains, and to respond to account information query requests from transaction nodes according to the latest account information, wherein the latest account information is generated by updating existing account information by the verification nodes according to latest transaction information, the latest account indication information is generated by the verification nodes according to the latest account information, and the latest blocks are the reference of consensus between the verification nodes and other verification nodes in the digital transaction system according to a consensus algorithm; and the transaction nodes configured to transmit the account information query requests to the verification nodes and receive responses of the verification nodes to the account information query requests.

The invention provides a data correlation query device and a data correlation query method. The data correlation query device comprises a data acquisition unit, an SQL (structured query language) execution unit, a cache number-picking formula construction unit and a cache execution unit. The data acquisition unit is used for obtaining a fundamental field of a fact table and selecting a field of a dimension table based on the fundamental field to be used as an correlation field for correlation of the fact table and the dimension table; and the SQL execution unit is used for implementing query operations through SQL statements based on the fundamental field and a datasheet with the fundamental field, and obtaining a result set; the cache number-picking formula construction unit is used for obtaining a main key value corresponding to the correlation field from the result set, and constructing a cache number-picking formula in combination with a data path with the correlation field; and the cache execution unit is used for obtaining the value of the correlation field according to the cache number-picking formula and combining the value of the correlation field and the result set to obtain final query results. The fact table and the dimension table can be associated efficiently, results can be implemented efficiently, the fatal pressure on the system caused by correlation query of the fact table and the dimension table with a large number of data can be avoided, and the efficiency can be improved.

The invention relates to a real time data compressing method, for compressing in-data packet data in a process control system, where the real time data comprises numerical values of analogue quantities and the method comprises: 1) initializing a dictionary, i.e. initializing characters that possibly occur during compressing into a dictionary; 2) reading in numerical valves; 3) making subtraction of adjacent data to obtain difference values and storing the first read-in numerical value in compressed files; 4) adopting LZW algorithm to compress the difference values. The invention realizes the lossless compression of real time data and the compressing course is safe and reliable. The invention has very good rapidness and can meet the requirements of real time databases and raises the history data inquiring efficiency.

The invention provides a customizable query method and a platform on the basis of service composition. The method comprises: describing own demands to the platform by a user through an appointed client end visible component and through operations of selecting and filling the attribute value of the component, analyzing the initial state and the target state of a data query request, then, searching and combining a corresponding basic service calling sequence, then, executing basic services in the sequence, thereby obtaining a result set which contains user expected result data, and generating a final result to display to the user through screening, sequencing and assembling. In the method, the user describes own demands to a system actively, the system can effectively adapt different individualized demands of different users through receiving user description and dynamic analysis processing, the application system development work load and the later maintenance cost are lowered, and the friendliness of a data query application system is improved, which enables the user to customize data query actively and enables inquiry to be flexible and convenient.

The invention discloses a query optimization method based on a unified view of a distributed heterogeneous database. The method comprises the following steps of: configuring the unified view for the distributed heterogeneous database for external access; effectively decomposing SQL query statements of the unified view according to a physical table of a database to be queried so as to maximally reduce the number of accesses; querying corresponding physical table by the decomposed SQL query statements and returning back resultant data, wherein a cache region is firstly queried, if the cache region contains corresponding resultant data, the result is directly obtained, and priorities are set for the SQL query statements so as to obtain an optimal result set as much as possible in each time while querying the physical table; and combining the resultant data returned after querying the physical table, and storing the combined resultant data and the corresponding SQL query statements into the cache region. The query optimization method based on the unified view of the distributed heterogeneous database improves efficiency for querying the unified view of the distributed heterogeneous database and reduces usage of resource.

The invention relates to a blockchain network, an object transaction method, a device and node equipment, wherein the object transaction method comprises the steps of transmitting a transaction request of a preset object to authorized nodes in a blockchain to which a preset object transaction is related; respectively receiving transaction verification information which is obtained by each authorized node according to the received transaction request; acquiring a verification result according to the transaction verification information; and transmitting the verification result to each authorized node, wherein the verification result is used for confirming or canceling transaction of the preset object by each authorized node. According to the blockchain network, different objects correspond with different blockchains; and in a transaction confirmation process, through co-verification of the nodes in multiple blockchains, the verification result is obtained, thereby ensuring high transaction safety, reducing the length of a single blockchain, reducing data volume of each node, improving searching efficiency of the blockchain, improving gathering efficiency and statistics efficiency of single kind of objects and improving concurrence.

The invention discloses a theme map expansion based knowledge resource organizing method, which is characterized by including: organizing resources to build resource indexes, and providing a search architecture based on themes on the basis of a map architecture formed by knowledge resources and theme incidence relations therein. In the search architecture, themes of documents are organized to be index entry, document collection is divided by combining internal relations of succession, correlation, polysemy of the document themes and multi-label classifying technology, proper partition is selected by a partition selecting method based on threshold value so as to guide building and inquiring of the indexes. During inquiring, inquiry results are acquired from a route to the relevant index partition and are gathered and organized according to the theme relations, and resource utilization rate and inquiring efficiency are improved sufficiently on the premise of guaranteeing quality of the inquiry quality. Further, by the index partition gathering and breaking technology, the index structure is further optimized and quality of the inquiry results and inquiring efficiency are improved.

The invention provides a method and a system for inquiring personal credit information, and a personal credit inquiring system. A client and the personal inquiring system adopt a mode of asynchronous communication, and process inquiry requests of a plurality of clients synchronously, so as to improve inquiry efficiency, improve performance of the system, and meet requirements of clients. The system for inquiring personal credit information in a personal credit investigation system comprises the plurality of the clients for initiating the inquiry requests to the personal credit inquiring system through calling service of an information middleware of the personal credit inquiring system and ending request processing, and the personal credit inquiring system for receiving the inquiry requests sent by the plurality of the clients, inquiring the personal credit information in the personal credit investigation system according to the inquiry requests, updating a local database according to the inquired personal credit information, and calling the information middleware of the clients to send the inquired personal credit information to the clients.

Provided are an index creation method, querying method, apparatus and device for spatial-temporal data. The index creation method comprises: generating a multistage time index tree by taking a pre-set time range as a root node; moreover, generating a multistage spatial index tree by taking a pre-set spatial range as a root node; respectively mapping each time slice leaf node and each space leaf sub-node into a spatial-temporal file, wherein the spatial-temporal file is used for storing time slices which are characterized by the time slice leaf nodes having a mapping relationship with the spatial-temporal file and spatial-temporal data which is characterized by the space leaf sub-nodes and corresponds to subspaces. The spatial-temporal data index created on the basis of the index creation method for spatial-temporal data provided in the embodiments of the present invention improves the querying efficiency when spatial-temporal data is searched. The present invention relates to the technical field of computers.

The invention discloses a query method and system for colored message log, which is based on a distributed database. The system includes a colored message centre, a log server, a log query server and a WEB client-side. The colored message centre includes a plurality of service processors which are used for simultaneous business treatments. Log files are produced during the business treatment process of every business processor. The log server includes a relative collector and a database, which are used for collecting the log files produced by the business processors and introducing the files to the database in batches. The log query server is used for providing a query interface for the log server and providing WEB services for WEB clients. The query method and system for colored message log which is based on a distributed database adopts the three-tier architecture of a query thread manager which is arranged between a database connection pool and query services. The concurrent query of a plurality of log servers is realized. The query efficiency is improved and at the same time the robustness of the system is promoted.

The invention relates to the field of communication and discloses a Bluetooth function control method of a mobile terminal and the mobile terminal. According to the invention, the mobile terminal automatically starts the Bluetooth function when receiving a trigger signal of a voice application and finds a Bluetooth headset which can be paired with the mobile terminal to be paired by searching the Bluetooth headset which is in an available state around, and the Bluetooth headset is utilized to send and receive a relevant signal of the voice application (for example, the Bluetooth headset is utilized to carry out communication) after the pairing is succeeded. After the voice application is ended, the Bluetooth function of the mobile terminal is automatically closed. According to the Bluetooth function control method of mobile terminal and mobile terminal, the Bluetooth function on the mobile terminal still can use the Bluetooth headset to carry out communication or other voice applications without keeping open, thereby greatly lowering the power consumption and the electromagnetic radiation of the mobile terminal.

The invention relates to a trajectory tracking system based on face recognition, which comprises a control center and a plurality of photographing units, and is characterized in that the control center is internally provided with a face recognition unit, an information adding unit, a trajectory querying unit and a trajectory editing unit, wherein the face recognition unit is used for acquiring first face recognition information in a video scene; the information adding unit is used for adding trajectory information to the first face recognition information and storing the first face recognition information into a face recognition information base; the trajectory querying unit is used for acquiring second face recognition information of a query person, comparing the second face recognition information with the first face recognition information, and acquiring a face similarity comparison value; and the trajectory editing unit calls all first face recognition information with the face similarity comparison value being greater than a set threshold value, and performs sorting according to the trajectory information. According to the invention, the face recognition information of related figures in multiple video scenes is extracted through a face recognition technology, the extracted face recognition information is compared with acquired face recognition information, the similarity is added, all trajectory information with high similarity with a query person is extracted with querying is performed again, and a moving trajectory of the query person is displayed.

The invention provides an association relationship query method and a device. The association relationship query method comprises the following steps: receiving an association relationship request carrying an object identifier and a scheme identifier; obtaining an association relationship table which is associated with the scheme identifier from the preset association relationship table; and querying the association relationship which corresponds to the object identifier from the obtained association relationship table. The association relationship query technical method directly queries the association relationship of an object from the association relationship table which is associated with the scheme, thereby overcoming the problems of slow query speed and low efficiency produced by multi-table combined query of the association relationship in the prior art and realizing the rapid and high-efficient association relationship query.