probabilistic thresholdrange aggregate query processing over uncertain data

Probabilistic Threshold Range Aggregate Query Processing ...

Probabilistic Threshold Range Aggregate Query Processing over Uncertain Data Shuxiang Yang∗, Wenjie Zhang+, Ying Zhang∗, and Xuemin Lin+ ∗The University of New South Wales, Australia + The University of New South Wales & NICTA, Australia {syang, zhangw, yingz, …

Query Processing on Probabilistic Data: A Survey

Query Processing on Probabilistic Data: A Survey. Foundations and Trends R in Databases, ... which have millions to billions of uncertain tuples. Query processing in databases systems is a mature field. Tech- ... The query evaluation problem over probabilistic databases has been studied over the last twenty years [Fuhr and Rölleke, 1997, Lak- ...

A Novel Filtering Technique for Processing Uncertain ...

Range aggregate query processing was explored in [7] over uncertain data. They proposed two approaches for the actual estimation of aggregate values required by range queries. Probabilistic range query was investigated by Dai et al. [8] on uncertain data. Range queries are also studied in [9] and [10] with a constraint.

Evaluating Probabilistic Queries over Imprecise Data

Evaluating Probabilistic Queries over Imprecise Data ... suchastemperatureandwindspeed. Acentralizeddatabase tracks these entities to enable query processing. Due to con-tinuous changes in these values and limited resources (e.g., ... query evaluation based upon uncertain data. A classifica-tion of queries is made based upon the nature of the ...

probabilistic thresholdrange aggregate query processing ...

probabilistic thresholdrange aggregate query processing over uncertain data. APWeb Asia-Pacific Web Conference. A QoS-Guaranteeing Scheduling Algorithm for Continuous Queries over Stream Shanshan Wu Yanfei Lv Ge Yu Yu Gu Xiaojing Li IMCS Incremental Mining …

Probabilistic skylines on uncertain data - dl.acm.org

Shuxiang Yang, Wenjie Zhang, Ying Zhang, Xuemin Lin, Probabilistic Threshold Range Aggregate Query Processing over Uncertain Data, Proceedings of the Joint International Conferences on Advances in Data and Web Management, April 02-04, 2009, Suzhou, China

Efficient indexing methods for probabilistic threshold ...

In this paper, we study probabilistic query evaluation based on uncertain data. A classification of queries is made based upon the nature of the result set. For each class, we develop algorithms for computing probabilistic answers, and provide efficient indexing and numeric solutions.

Making Aggregation Work in Uncertain and Probabilistic ...

Making Aggregation Work in Uncertain and Probabilistic Databases Raghotham Murthy, Robert Ikeda, Jennifer Widom ... Query Processing I. INTRODUCTION ... we support variants for each aggregate function that return a single value over uncertain data, instead of a set of possible values: a function returning the lowest possible value ...

Probabilistic threshold range aggregate query processing ...

A probabilistic threshold range aggregate (PRTA) query retrieves summarized information about the uncertain objects in the database satisfying a range query, with respect to a given probability threshold. This thesis is trying to address and handle this important type of query …

US20090222472A1 - Google Patents

Techniques are disclosed for aggregation in uncertain data in data processing systems. For example, a method of aggregation in an application that involves an uncertain data set includes the following steps. The uncertain data set along with uncertainty information is obtained. One or more clusters of data points are constructed from the data set.

Probabilistic Threshold Join over Distributed Uncertain Data

Abstract. Large amount of uncertain data is collected by many emerging applications which contain multiple sources in a distributed manner. Previous efforts on querying uncertain data in distributed environment have only focus on ranking and skyline, join queries have not been addressed in earlier work despite their importance in databases.

Aggregate Query Answering under Uncertain Schema …

aggregates over uncertain data [14], [15], yet none at all w.r.t. aggregate computations under probabilistic schema mapping. Aggregates over probabilistic data can be processed in three ways (atleast). In the first way, an aggregate query returns a set of possible values for the answer, together with a probability distribution over that set.

Top-k Query Processing in Uncertain Databases

data distributions with orders of magnitude improvement over na¨ıve materialization of possible worlds. 1 Introduction Efficient processing of uncertain (probabilistic) data is a crucial requirement in different domains including sensor networks [21, 8], moving objects tracking [7, 9] and data cleaning [12, 3]. Several probabilistic data ...

Probabilistic Threshold Range Aggregate Query Processing ...

A probabilistic threshold range aggregate (PTRA) query retrieves summarized information about the uncertain objects satisfying a range query, with respect to a given probability threshold. This paper is the first one to address this important type of query.

also aggregate data for query processing and the siz

also aggregate data for query processing and the siz. Probabilistic Threshold Range Aggregate Query Processing over Uncertain Data Shuxiang Yang∗, Wenjie Zhang+, Ying Zhang∗, and Xuemin Lin+ ∗The University … . Online Consultation. Spatial Query Processing in an Object-Oriented Database System. Read more

Efficient Processing of Aggregates in Probabilistic Databases

processing uncertain data in practice. Computing aggregates over probabilistic data is useful in situations where analytical processing is required over uncertain data. Since errors are inevitably introduced in the data, or the nature of certain kinds of data is uncertain, in a natural manner the need arises to process

Probabilistic Threshold Range Aggregate Query Processing ...

Sep 25, 2014· Probabilistic Threshold Range Aggregate Query Processing over Uncertain Data An Image/Link below is provided (as is) to download presentation. Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.

PPT – Skyline Queries PowerPoint presentation | free to ...

Probabilistic Threshold Range Aggregate Query Processing over Uncertain Data - Probabilistic Threshold Range Aggregate Query Processing over Uncertain ... Skyline Queries [PJLY07] Range query. DBG @ UNSW. 13. Uncertain objects, exact query ...

Probabilistic Threshold Range Aggregate Query Processing ...

CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): Abstract. Large amount of uncertain data is inherent in many novel and important applications such as sensor data analysis and mobile data management. A probabilistic threshold range aggregate (PTRA) query retrieves summarized information about the uncertain objects satisfying a range query, with respect to a given ...

Approximate Query Processing: Techniques - PowerShow

Probabilistic Threshold Range Aggregate Query Processing over Uncertain Data - Probabilistic Threshold Range Aggregate Query Processing over Uncertain ... Skyline Queries [PJLY07] Range query. ... The PowerPoint PPT presentation: "Approximate Query Processing: Techniques" is the property of its rightful owner.

Optimizing Probabilistic Query Processing on Continuous ...

In this section, we present a data model for probabilistic query processing on continuous uncertain data. This model provides a technical context for our discussion in later sections. Probability distributions. A Gaussian Mixture Model (GMM) describes a probability distribution using a convex combination of Gaussian distributions.

Top k probabilistic skyline queries on uncertain data ...

Nov 23, 2018· Uncertainty of data is inherent in many applications, and query processing over uncertain data has gained widespread attention. The probabilistic skyline query is a powerful tool for managing uncertain data.

Aggregate functions over probabilistic data - ScienceDirect

Query processing involving ag- gregate functions over uncertain data is rarely considered. In this paper, we define a set of extended aggregate functions over probabilistic data. The time complexity of the computations for these extended aggregate functions is, in gen- eral, exponential.

Probabilistic Similarity Join on Uncertain Data | Request PDF

Probabilistic Similarity Join on Uncertain Data. ... Probabilistic Threshold Range Aggregate Query Processing over Uncertain Data ... Query processing over uncertain data …

Obabilistic Thresholdrange Aggregate Query Processing Over ...

@MISC{Yang_probabilisticthreshold, author = {Shuxiang Yang and Wenjie Zhang and Ying Zhang and Xuemin Lin}, title = {Probabilistic Threshold Range Aggregate Query Processing over Uncertain Data}, year = {}} Abstract. Large amount of uncertain data is …

Probabilistic Threshold Range Aggregate Query Processing ...

Large amount of uncertain data is inherent in many novel and important applications such as sensor data analysis and mobile data management. A probabilistic threshold range aggregate (PTRA) query retrieves summarized information about the uncertain objects satisfying a range query, with respect to a given probability threshold.

Aggregate Computations over Uncertain and Probabilistic ...

Aggregate Computations over Uncertain and Probabilistic Data in TRIO System. Adam Shafi Shaik1, ... performed on uncertain and probabilistic data in TRIO system. Keywords - Aggregation, Uncertain data, ... query processing against relational and spatial uncertain data. Many important results have

Approximate Query Processing: Techniques & Applications ...

Jul 29, 2012· Approximate Query Processing: Techniques & Applications ... Due to the large scale of the system, the values of aggregate functions over the data in the whole network (or a large part of it) are often more important than individual data at nodes. ... Probabilistic Threshold Range Aggregate Query Processing over Uncertain Data -. wenjie zhang ...