摘要:
Sequence-based XML indexing aims at avoiding expensive join operations in query processing. It transforms structured XML data into sequences so that a structured query can be answered holistically through subsequence matching. Herein, there is addressed the problem of query equivalence with respect to this transformation, and thereis introduced a performance-oriented principle for sequencing tree structures. With query equivalence, XML queries can be performed through subsequence matching without join operations, post-processing, or other special handling for problems such as false alarms. There is identified a class of sequencing methods for this purpose, and there is presented a novel subsequence matching algorithm that observe query equivalence. Also introduced is a performance-oriented principle to guide the sequencing of tree structures. For any given XML dataset, the principle finds an optimal sequencing strategy according to its schema and its data distribution; there is thus presented herein a novel method that realizes this principle.
摘要:
In connection with the mining of time-evolving data streams, a general framework that mines changes and reconstructs models from a data stream with unlabeled instances or a limited number of labeled instances. In particular, there are defined herein statistical profiling methods that extend a classification tree in order to guess the percentage of drifts in the data stream without any labelled data. Exact error can be estimated by actively sampling a small number of true labels. If the estimated error is significantly higher than empirical expectations, there preferably re-sampled a small number of true labels to reconstruct the decision tree from the leaf node level.
摘要:
One embodiment of the present method and apparatus adaptive in-operator load shedding includes receiving at least two data streams (each comprising a plurality of tuples, or data items) into respective sliding windows of memory. A throttling fraction is then calculated based on input rates associated with the data streams and on currently available processing resources. Tuples are then selected for processing from the data streams in accordance with the throttling fraction, where the selected tuples represent a subset of all tuples contained within the sliding window.
摘要:
A method, information processing system, and computer readable medium are provided for preserving privacy of one-dimensional nonstationary data streams. The method includes receiving a one-dimensional nonstationary data stream. A set of first-moment statistical values are calculated, for a given instant of sub-space of time, for the data. The first moment statistical values include a principal component for the sub-space of time. The data is perturbed with noise along the principal component in proportion to the first-moment of statistical values so that at least part of a set of second-moment statistical values for the data is perturbed by the noise only within a predetermined variance.
摘要:
Arrangements and methods for performing structural clustering between different time series. Time series data relating to a plurality of time series is accepted, structural features relating to the time series data are ascertained, and at least one distance between different time series via employing the structural features is determined. The different time series may be partitioned into clusters based on the at least one distance, and/or the k closest matches to a given time series query based on the at least one distance may be returned.
摘要:
Disclosed is a method for controlling a web farm having a plurality of websites and servers, the method comprising categorizing customer requests received from said websites into a plurality of categories, said categories comprising a shareable customer requests and unshareable customer requests, routing said shareable customer requests such that any of said servers may process shareable customer requests received from different said websites, and routing said unshareable customer requests from specific said websites only to specific servers to which said specific websites have been assigned.
摘要:
Most recent research of scalable inductive learning on very large streaming dataset focuses on eliminating memory constraints and reducing the number of sequential data scans. However, state-of-the-art algorithms still require multiple scans over the data set and use sophisticated control mechanisms and data structures. There is discussed herein a general inductive learning framework that scans the dataset exactly once. Then, there is proposed an extension based on Hoeffding's inequality that scans the dataset less than once. The proposed frameworks are applicable to a wide range of inductive learners.
摘要:
Systems and methods are provided wherein a consumable item parameter is exchanged between a consumable item and a consuming device. According to one embodiment, a consumable item parameter request is transmitted to a device associated with a consumable item, and the consumable item parameter is then received. The device may comprise, for example, the consumable item or a device associated with dispensing the consumable item. The device may also comprise, for example, a device associated with a consumption of the consumable item, a device adapted to control a consumption of the consumable item, or a device that consumes the consumable item.
摘要:
The present invention relates to a method for representing users within an online environment. The method allows users to define environmental parameters for controlling user interaction, define user representation parameters of user data within the environment, capture user data from the users, build an abstract graphical display of the environment, and build a user representation within the abstract graphical display for each user's data.
摘要:
The present invention provides a method, system and apparatus enabling user-defined, genre-structured interaction online. The present invention enables users to define their own genres, including rules of interaction, as well as rules of enforcement. Genre definitions also can include the specification of roles, parameters, and states. The present invention also facilitates a given user to modify a given genre definition. Allowable modifications include addition, modification, and deletion of parameters and interaction and enforcement rules. The present invention also provides dynamically updated graphical representations of the state of genre instances, these graphical representations definable by the users.