Abstract:
A system and method for traffic prediction based on space-time relation are disclosed. The system comprises a section spatial influence determining section for determining, for each of a plurality of sections to be predicted, spatial influences on the section by its neighboring sections; a traffic prediction model establishment section for establishing, for each of the plurality of sections to be predicted, a traffic prediction model by using the determined spatial influences and historical traffic data of the plurality of sections; and a traffic prediction section for predicting traffic of each of the plurality of sections to be predicted for a future time period by using real-time traffic data and the traffic prediction model. An apparatus and method for determining spatial influences among sections, as well as an apparatus and method for traffic prediction, are also disclosed. With the present invention, a spatial influence of a section can be used as a spatial operator and a time sequence model can be incorporated, such that the influences on a current section by its neighboring section for a plurality of spatial orders can be taken into account. In this way, the traffic condition in a spatial scope can be measured more practically, so as to improve accuracy of prediction.
Abstract:
Here is disclosed a method, an apparatus and a system for identifying a Graphical User Interface (GUI) element. According to an aspect of the present invention, a method of generating a GUI element identification information comprises: displaying a GUI which includes a target GUI element; analyzing the displayed GUI, to acquire attribute information for the target GUI element; acquiring extra information, other than the attribute information, related to the target GUI element; and processing the attribute information and the extra information to generate the identification information for the target GUI element.
Abstract:
A method and apparatus for representing a road network and a method and system for processing traffic information data using the method for representing a road network are provided. The method for processing traffic information data comprises: conversion step of converting traffic information data based on road networks of one or more types of road maps into traffic information data of intersections and sections, based on correspondence between the road networks of one or more types of road maps and the road network represented by the intersections and the sections, wherein the road network represented by the intersections and the sections is obtained by the method for representing a road network; and fusion step of fusing the converted traffic information data of intersections and sections to obtain unified traffic information data. The present invention proposes using a road network represented by intersections and sections as an intermediate model, which emphasizes the importance of intersections as hub nodes of the road network, and is compatible with various forms of map representations and universal. In this way, more accurate and comprehensive information can be obtained by fusing traffic information data from different data sources, which is advantageous for services such as traffic information prediction.
Abstract:
A natural language based location query system and a method thereof. The system comprises a receiving device which receives a request for natural language query from a user terminal; an access device which accesses a location ontology base and a location query language base that are external to the system or internal in the system, wherein the location ontology base comprising knowledge descriptions about the field of a location service, and the location query language base comprising a language model for the location service query; a natural language query processing device which performs at least one of a fuzzy processing and an indirection processing on the received request for natural language query by searching the location ontology base and the location query language base with the access device, retrieves location information corresponding to the request from a location database; and a sending device which sends the location information to the user terminal. This invention also provides a keyword based location query system and a method thereof, and a natural language based and keyword based location query system and a method thereof. This invention not only process user fuzzy query and indirect query, but also process compound sentence query and query having semantic error. Therefore, the degree of freedom of user query is enhanced and the location query is more flexible and accurate.
Abstract:
The present invention discloses a method and a system for out-of-band predistortion linearization, comprising steps of: dividing base band inputted or intermediate frequency signal into an in-band signal branch and an out-of-band signal branch; processing the in-band signal to form RF (Radio Frequency) signal; processing the out-of-band signal to form out-of-band predistortion signal for pre-compensating the in-band signal; adding the in-band signal with the out-of-band predistortion signal, and taking the result as the input of RF power amplifier. The present invention compensates the nonlinear distortion of the RF power amplifier by a way of out-of-band compensating signal in a wireless communication environment, thereby avoiding the limitation of improving performance of conventional predistortion method, and solving the limitation of bandwidth and capability of the predistortion system caused by memory effect.
Abstract:
A road network is described using roads, intersections and sections as traffic information elements and a correspondence between these elements and a road topological network in a digital map is established, so that a universal traffic information describing model, which is compatible with language used in people's daily life, can be established. The traffic information element knowledge base is generated based on roads, intersections and sections, respective attributes and the relationship between them, to support inter-conversion between road topological network traffic information and text-based traffic information. With the universal traffic information describing model and the traffic information element knowledge base, fusion and conversion of traffic data from various sources and to support various forms of presentation and interaction for traffic information, such as presentation of traffic information on digital navigation map, textual description of traffic information, map presentation of traffic information for urban trunk roads, etc. can be supported.
Abstract:
The present invention discloses a predistortion method based on vector envelope injection. The method includes the following steps: radio frequency input signals are divided into two signal streams; one input signal stream generates two envelope injection signals whose amplitudes can be adjusted independently; the other signal stream is divided into further two radio frequency signal streams; the two radio frequency signal streams are amplified with the same amplitude; frequency mixing is performed for the two envelope injection signals and two radio frequency signal streams respectively to obtain two compensation signals; the amplified radio frequency signal and compensation signals are power synthesized in the same way, so as to obtain two compensation signals and amplified radio frequency signals of different directions. This present invention also provides a corresponding predistortion device.
Abstract:
A natural language based location query system and a method thereof. The system comprises a receiving device which receives a request for natural language query from a user terminal; an access device which accesses a location ontology base and a location query language base that are external to the system or internal in the system, wherein the location ontology base comprising knowledge descriptions about the field of a location service, and the location query language base comprising a language model for the location service query; a natural language query processing device which performs at least one of a fuzzy processing and an indirection processing on the received request for natural language query by searching the location ontology base and the location query language base with the access device, retrieves location information corresponding to the request from a location database; and a sending device which sends the location information to the user terminal. This invention also provides a keyword based location query system and a method thereof, and a natural language based and keyword based location query system and a method thereof. This invention not only process user fuzzy query and indirect query, but also process compound sentence query and query having semantic error. Therefore, the degree of freedom of user query is enhanced and the location query is more flexible and accurate.
Abstract:
The invention provides a traffic information gathering device, a traffic information gathering method, a traffic information gathering and searching system and a traffic information gathering and searching method. The traffic information gathering and searching system for receiving traffic information from a user terminal and providing traffic information query service, comprises a map knowledge base generating section for generating information comprising attributes of roads and traffic points, attribute values corresponding to the attributes, and spatial relationship among the attribute values based on an electronic map so as to form a map knowledge base; a traffic information processing section for receiving traffic information from the user terminal, and decomposing the traffic information if it is determined that the traffic information can be decomposed according to the map knowledge base, so as to generate traffic information corresponding to attribute values of roads or traffic points; and a query information processing section for receiving a query request from the user terminal and analyzing it, decomposing the query request if it is determined that the query request can be composed according to the map knowledge base, and searching the traffic information database based on the decomposed query request.
Abstract:
This application discloses a method and an apparatus for printing a variable data barcode. The method may include a step of printing a variable data barcode corresponding to a first barcode on a medium by an inkjet printing device (S10), a step of transferring the medium via a transmission means to a detecting region (S20), a step of scanning the variable data barcode on the medium in the detecting region to obtain a second barcode by an online detecting device (S30), and a step of comparing the first barcode to the second barcode. If they do not match, an alarm may be issued (S40). The present application can improve the printing pass rate of variable data barcodes.