our products

D&Q Mining is a high-tech company integrating R&D, production and sales. It provides mature products and solutions such as crushers, sand making, milling equipment, mobile crushing stations, etc., for aggregate, mining and waste recycling.

aggregate quarry processing sensor networks

Aggregate query processing in the presence of duplicates

Mar 10, 2015· Sliding Window Aggregate Queries: A sensor network can be considered as a source of stream data. Then, the stream data can be broken into possibly overlapping partitions by specifying a window and computation can be carried out in each partition.

More

Robust and Efficient Aggregate Query Processing in

Note that COSE determines the schedule of sensor networks for query processing along the pipeline. It does not affect the original transfer/aggregation mechanism [7], [8] of any sensor network.

More

Interplay of processing and routing in aggregate query

Interplay of processing and routing in aggregate query optimization for sensor networks Niki Trigoni Alexandre Guitton Antonios Skordylis Computing Laboratory, University of Oxford, Oxford OX1 3QD, UK Abstract. This paper presents a novel approach to processing continuous aggre-gate queries in sensor networks, which lifts the assumption of tree-based rout-ing.

More

Robust and Efficient Aggregate Query Processing in

Wireless sensor networks have been widely used in many applications, such as soil temperature monitoring for plant growth and abnormal event detection of industrial parameters. Among these applications, aggregate queries, such as SUM, COUNT, AVERAGE, MIN and MAX are often used to collect statistical data.

More

(PDF) Interplay of Processing and Routing in Aggregate

Interplay of Processing and Routing in Aggregate Query Optimization for Sensor Networks Antonios Skordylis IntroductionA typical way of extracting information from a sensor network is to disseminate declarative aggregate queries from a gateway node to sensor nodes, asking them to periodically monitor the environment, and return aggregate results in regular rounds.

More

(PDF) Routing and processing multiple aggregate queries in

Tree-based routing has been proposed as an energy- Sensors are nodes with communication, computation, efficient mechanism for processing aggregate queries in sen- storage and sensing capabilities that can be deployed in large sor networks [1, 2].

More

Processing approximate aggregate queries in wireless

Dec 01, 2006· Aggregate queries. Approximation. 1. Introduction. Densely distributed sensor networks are used in a variety of monitoring applications ranging from measurements of meteorological data (like temperature, pressure, humidity), noise levels, chemicals etc., to complex military vehicle surveillance and tracking applications.

More

1 Robust Computation of Aggregates in Wireless Sensor

For cooperative processing in a sensor network, the information of interest is not the data at an individual sensor node, but the aggregate statistics (aggregates) amid a group of sensor nodes [19], [15]. Possible applications using aggregates are the average temperature, the average gas concentration of a hazardous gas in an area, the average

More

Interplay of processing and routing in aggregate query

Interplay of processing and routing in aggregate query optimization for sensor networks Niki Trigoni Alexandre Guitton Antonios Skordylis Computing Laboratory, University of Oxford, Oxford OX1 3QD, UK Abstract. This paper presents a novel approach to processing continuous aggre-gate queries in sensor networks, which lifts the assumption of tree

More

Robust and Efficient Aggregate Query Processing in

Wireless sensor networks have been widely used in many applications, such as soil temperature monitoring for plant growth and abnormal event detection of industrial parameters. Among these applications, aggregate queries, such as SUM, COUNT, AVERAGE, MIN and MAX are often used to collect statistical data.

More

Robust and Efficient Aggregate Query Processing in

Previous approaches for computing duplicate-sensitive aggregates in wireless sensor networks have used a tree topology, in order to conserve energy and to avoid double-counting sensor readings.

More

Processing approximate aggregate queries in wireless

Dec 01, 2006· Processing approximate aggregate queries in wireless sensor networks The Cougar approach to in-network query processing in sensor networks. SIGMOD Rec., 31 (3) (2002), pp. 9-18. CrossRef View Record in Scopus Google Scholar.

More

(PDF) Interplay of Processing and Routing in Aggregate

processing aggregate queries like avg, count, su m, min and max in sensor networks. The concept of semantic routing tree s (SRTs) [9] is used to forward queries on ly to children that satisfy the

More

CAPS: Energy-Efficient Processing of Continuous Aggregate

HU, Wen; MISRA, Archan; and SHOREY, Rajiv. CAPS: Energy-Efficient Processing of Continuous Aggregate Queries in Sensor Networks. (2006). 2006 IEEE International Conference on Pervasive Computing and Communications 4th PerCom: March 13-17, Pisa, Italy: Proceedings. 190-199. Research Collection School Of Information Systems.

More

(PDF) Routing and processing multiple aggregate queries in

Poster Abstract: Routing and Processing Multiple Aggregate Queries in Sensor Networks Niki Trigoni Alexandre Guitton Antonios Skordylis Birkbeck College, University of London, London WC1E 7HX, United Kingdom {niki,alexandre,adonis}@dcs.bbk.ac.uk Abstract We present a novel approach to processing continuous aggregate queries in sensor networks, which lifts the as- sumption of tree

More

1 Robust Computation of Aggregates in Wireless Sensor

For cooperative processing in a sensor network, the information of interest is not the data at an individual sensor node, but the aggregate statistics (aggregates) amid a group of sensor nodes [19], [15]. Possible applications using aggregates are the average temperature, the average gas concentration of a hazardous gas in an area, the average

More

Medians and Beyond: New Aggregation Techniques for

processing architectures over sensor networks. Their approach is based on a couple of observations : first, for a user, the individual sensor values do not hold much value. For example, in a sensor network spanning thousands of nodes, the user would like to know the average temperature of an extended region which might span a large number of

More

The Sybil Attack in Sensor Networks: Analysis & Defenses

allowed to flood the network only once per hour, but new nodes can join the network once per minute. an attacker could use the Sybil attack to evade such misbe-havior detection mechanisms. 3.2 New Attacks Data Aggregation Efficient query protocols [13] com-pute aggregates of sensor readings within the network in

More

Assembling Regions for Efficacious Aggregate Query

Assembling Regions for Efficacious Aggregate Query Processing in Wireless Sensor Networks by Apostolos Fertis Diploma, Electrical and Computer Engineering (2003) National Technical University of Athens Submitted to the Department of Electrical Engineering and Computer Science in partial fulfillment of the requirements of

More

Computing Aggregates for Monitoring Wireless Sensor

sensor networks. A monitoring infrastructure will be a crucial component of a deployed sensor network. Such an infrastructure indicates node failures, resource depletion, and other abnormalities. Our first contribution is an architecture for sensor network monitoring infrastructures, one that consists of three classes of software.

More

TinyCasper: A Privacy-Preserving Aggregate Location

niques designed for wireless sensor networks. On the other side, the aggregate query processing module is embedded in-side the server to support aggregate query processing over anonymized locations. TinyCasper system administrators can change the privacy requirement, i.e., k-anonymity re-quirement, at anytime. Finally, system users can issue snap-

More

A Privacy-Preserving Location Monitoring System for

Index TermsŠLocation privacy, wireless sensor networks, location monitoring system, aggregate query processing, spatial histogram F 1 INTRODUCTION The advance in wireless sensor technologies has resulted in many new applications for military and/or civilian purposes. Many cases of

More