Abstract: A mechanism is provided in a data processing system for precision adaptive trajectory query plan optimization. The mechanism identifies precision needs based on query instances and maps trajectory point data to the precision needs to form a precision support skeleton data structure. The mechanism generates an optimized query plan and executes the optimized query plan on the precision support skeleton data structure to identify at least one passing trajectory that passes the query. The mechanism then queries the trajectory point data for the at least one passing trajectory.

Abstract: In an approach to determining an air quality based on image, a computer performs a method, the method comprising: determining an image to be measured; determining an air quality model of at least one key area, the at least one key area including a key area associated with the image to be measured; acquiring a reference clear image corresponding to the image to be measured; and determining an air quality index to be measured based on an air quality related feature extracted from the image to be measured, the corresponding reference clear image, and the determined air quality model of the key area associated with the image to be measured.

Abstract: A mechanism is provided in a data processing system for precision adaptive trajectory query plan optimization. The mechanism identifies precision needs based on query instances and maps trajectory point data to the precision needs to form a precision support skeleton data structure. The mechanism generates an optimized query plan and executes the optimized query plan on the precision support skeleton data structure to identify at least one passing trajectory that passes the query. The mechanism then queries the trajectory point data for the at least one passing trajectory.

Abstract: In an approach to determining an air quality based on image, a computer performs a method, the method comprising: determining an image to be measured; determining an air quality model of at least one key area, the at least one key area including a key area associated with the image to be measured; acquiring a reference clear image corresponding to the image to be measured; and determining an air quality index to be measured based on an air quality related feature extracted from the image to be measured, the corresponding reference clear image, and the determined air quality model of the key area associated with the image to be measured.

Abstract: The present invention discloses a method and apparatus of determining air quality. The method comprising: determining at least one key area; acquiring a reference clear image, a training image under poor air quality and corresponding actual air quality index in at least one location of the key area; and training an air quality model of the key area based on feature extracted from the reference clear image and the training image and based on the actual air quality index. With the method and apparatus of the invention, air quality can be determined based on image.

Abstract: The present invention discloses an apparatus, method and computer program for providing page navigation in a multirole-enabled network application. The apparatus comprises: a virtual role creator adapted to create a virtual role for each user in the multirole-enabled network application based upon an atomic role set configured for the user; an access pattern generator adapted to generate a virtual-role-based access pattern by recording page access requests of the user and by performing pattern mining for the recorded page access requests according to the virtual role of the user; and a page navigation provider adapted to provide page navigation by utilizing the access pattern corresponding to the virtual role of the user when the user accesses the multirole-enabled network application. With the technical solution of the invention, pattern mining can be performed for access data of one or more users according to virtual role, so the user can be provided with optimized personalized page navigation.

Abstract: Embodiments of the present invention relate to a method and system for automatic event analysis. In particular, according to embodiments of the present invention, there is disclosed a method for automatic event analysis, comprising: collecting information on events of a predetermined type occurring at, within a period of time, at least one location in a space; determining a predictability of the events of the predetermined type with respect to the at least one location based on the collected information and a predetermined condition(s) related to the events of the predetermined type; and determining the stability of predictable events with respect to the at least one location within the period of time. Further, there is disclosed a corresponding system. According to embodiments of the present invention, it is possible to classify an event associated with a service and analyze the service demands in a more efficient way.

Abstract: The present invention discloses a method and apparatus of determining air quality. The method comprising: determining at least one key area; acquiring a reference clear image, a training image under poor air quality and corresponding actual air quality index in at least one location of the key area; and training an air quality model of the key area based on feature extracted from the reference clear image and the training image and based on the actual air quality index. With the method and apparatus of the invention, air quality can be determined based on image.

Abstract: Embodiments of the present invention relate to a method and system for automatic event analysis. In particular, according to embodiments of the present invention, there is disclosed a method for automatic event analysis, comprising: collecting information on events of a predetermined type occurring at, within a period of time, at least one location in a space; determining a predictability of the events of the predetermined type with respect to the at least one location based on the collected information and a predetermined condition(s) related to the events of the predetermined type; and determining the stability of predictable events with respect to the at least one location within the period of time. Further, there is disclosed a corresponding system. According to embodiments of the present invention, it is possible to classify an event associated with a service and analyze the service demands in a more efficient way.

Abstract: The present invention discloses an apparatus, method and computer program for providing page navigation in a multirole-enabled network application. The apparatus comprises: a virtual role creator adapted to create a virtual role for each user in the multirole-enabled network application based upon an atomic role set configured for the user; an access pattern generator adapted to generate a virtual-role-based access pattern by recording page access requests of the user and by performing pattern mining for the recorded page access requests according to the virtual role of the user; and a page navigation provider adapted to provide page navigation by utilizing the access pattern corresponding to the virtual role of the user when the user accesses the multirole-enabled network application. With the technical solution of the invention, pattern mining can be performed for access data of one or more users according to virtual role, so the user can be provided with optimized personalized page navigation.