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Computing aggregate over uncertain and probabilistic data is useful in situation where analytical processing is required over uncertain data. To make the user friendly database, we need the flexibility of queries over the uncertain and probabilistic database.
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.
In intensional query evaluation, the probabilistic inference is performed over a propositional formula called lineage expression: every relational query can be evaluated this way, but the data complexity dramatically depends on the query being evaluated, and can be #P-hard.
Request PDF | Probabilistic Threshold Join over Distributed Uncertain Data | Large amount of uncertain data is collected by many emerging applications which contain multiple sources in a ...
03/02/20 - Recently, the impressive accuracy of deep neural networks (DNNs) has created great demands on practical analytics over video data....
Apr 01, 2009· Advances in Data and Web Management by Qing Li, 9783642006715, available at Book Depository with free delivery worldwide.
ments, delay or loss in data transfer. As a rapidly growing amount of uncertain data is collected, it is highly desirable to conduct advanced analyzing and query processing over uncertain data. The following five important aspects for uncertain data management are investigated in this thesis. We study the problem of probabilistic top-k skyline ...
As uncertainty is the inherent character of sensing data, the processing and optimization techniques for Probabilistic Skyline (PS) in wireless sensor networks (WSNs) are investigated. It can be proved that PS is not decomposable after analyzing its properties, so in-network aggregation techniques cannot be used directly to improve the performance. In this paper, an …
probabilistic variable. Uncertain data streams are important in growing number of environments, such as traditional sensor networks, RFID networks for object tracking, radar networks for severe weather monitoring and etc.Aggregate query, in particular SUM queries, are essential for many applications that deal with uncertain data.
Complex Event Processing over Unreliable RFID Data Streams. Yanming Nie, Zhanhuai Li, Qun Chen. ... Probabilistic Threshold Range Aggregate Query Processing over Uncertain Data. Shuxiang Yang, Wenjie Zhang, Ying Zhang, Xuemin Lin ... Modeling and querying probabilistic RDFS Data Sets with Correlated Triples. Chi-Cheong Szeto, Edward Hung, Yu Deng.
Request PDF | Probabilistic Threshold Join over Distributed Uncertain Data | Large amount of uncertain data is collected by many emerging applications which contain multiple sources in a ...
UNSW Sydney NSW 2052 Australia Telephone +61 2 93851000 Authorised by Deputy Vice-Chancellor (Research) UNSW CRICOS Provider Code: 00098G ABN: 57 195 873 179
Ranking and aggregating uncertain (probabilistic) data raises new challenges in query semantics and processing, making conventional methods inapplicable. Furthermore, uncertainty imposes probability as a new ranking dimension that does not exist in the traditional settings.
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, lxue}@cse.unsw.edu.au Abstract.
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 which there is no previous work studying on.
Aug 01, 2012· The Jaccard containment over uncertain set-valued data is a random variable, representing the probability distribution of exact Jaccard containment values in all possible worlds. ... Query processing on uncertain data. Numerous probabilistic queries have been proposed for uncertain data, for example, Probability Threshold Range Queries,, ...
challenging for uncertain data. Existing work on query processing over uncertain data can be divided into two broad categories. The first is concerned with the correct evaluation of probabilities in accordance with PWS. These issues were first highlighted in [10] and have been addressed by most models proposed for uncertain data [2, 14, 23, 22].
Apr 30, 2013· Uncertain data have already widely existed in many practical applications recently, such as sensor networks, RFID networks, location-based services, and mobile object management. Query processing over uncertain data as an important aspect of uncertain data management has received increasing attention in the field of database. Uncertain query processing …
Apr 02, 2009· 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.
Query Processing over Probabilistic Data DEFINITION An uncertain or probabilistic database is de ned as a probability distribution over a set of deterministic database instances called possible worlds. In the classical deterministic setting, the query processing problem is to compute the set of tuples representing the answer of a given query on ...
Shuxiang Yang, Wenjie Zhang, Ying Zhang, Xuemin Lin: Probabilistic Threshold Range Aggregate Query Processing over Uncertain Data. APWeb/WAIM 2009: 51-62: 12 : Bo Huang, Junyong Ding, Jinquan Dai, Wenjie Zhang: SharK: A Web 2.0 Service Infrastructure for Knowledge Sharing . CSEDU (1) 2009: 133-139: 11
Probabilistic Threshold Range Aggregate Query Processing over Uncertain Data. 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 ...