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Efficient MaxCount and threshold operators of moving objects

Scot Anderson, Peter Revesz
2008 Geoinformatica  
This paper presents the following six d-dimensional moving object operators: (1) MaxCount (or MinCount), which finds the Maximum (or Minimum) number of moving objects simultaneously present in the dynamic  ...  Calculating operators of continuously moving objects presents some unique challenges, especially when the operators involve aggregation or the concept of congestion, which happens when the number of moving  ...  Open Access This article is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium, provided  ... 
doi:10.1007/s10707-008-0050-7 fatcat:axof2ctt2vc2pjqy53hfpphn4y

Efficient Threshold Aggregation of Moving Objects [article]

Scot Anderson, Peter Revesz
2007 arXiv   pre-print
Calculating aggregation operators of moving point objects, using time as a continuous variable, presents unique problems when querying for congestion in a moving and changing (or dynamic) query space.  ...  We present a set of congestion query operators, based on a threshold value, that estimate the following 5 aggregation operations in d-dimensions. 1) We call the count of point objects that intersect the  ...  Together MaxCount (MinCount) and the threshold operators form a complete set of threshold aggregation operators comparable to the aggregation operators given in relational databases.  ... 
arXiv:cs/0611031v2 fatcat:s6tsdmvetngszndxfcx6rwvure

Fuzzy logic in the multi-agent financial decision support system

Jerzy Korczak, Marcin Hernes, Maciej Bac
2015 Proceedings of the 2015 Federated Conference on Computer Science and Information Systems  
The first part of the article contains a discussion related to the use of fuzzy logic as an agents' knowledge representation.  ...  The article presents the application of a fuzzy logic in building the trading agents of the a-Trader system. The system supports investment decisions on the FOREX market.  ...  and the EMA benchmark (Exponential Moving Average --a type of moving average that is similar to a simple moving average, except that more weight is given to the latest data).  ... 
doi:10.15439/2015f155 dblp:conf/fedcsis/KorczakHB15 fatcat:eay4gpu5fve4xnhtjzjob2nyhm

The Use of Precomputed Triangle Clusters for Accelerated Ray Tracing in Dynamic Scenes

Kirill Garanzha
2009 Computer graphics forum (Print)  
This heuristic combines the density of connectivity, geometric size and the shape of the cluster.  ...  Our approach accelerates the BVH builder by an order of magnitude rebuilding only the set of clusters that is much smaller than the original set of triangles.  ...  Acknowledgements The author thanks Erica Darkina and anonymous reviewers for providing feedback on the paper.  ... 
doi:10.1111/j.1467-8659.2009.01497.x fatcat:j77dyw6wa5g5no3vqpccmxwnuy


Avishay Traeger, Ivan Deras, Erez Zadok
2008 Performance Evaluation Review  
OSprof is a versatile, portable, and efficient profiling methodology based on the analysis of latency distributions.  ...  These latency distributions are presented as histograms and contain distinct groups of data, called peaks, that characterize the overall behavior of the running code.  ...  The idea for this work and an initial design were inspired while on internship at IBM Haifa Research Labs.  ... 
doi:10.1145/1384529.1375489 fatcat:pjdp7k3zefbftcsqprw3abbz7e


Avishay Traeger, Ivan Deras, Erez Zadok
2008 Proceedings of the 2008 ACM SIGMETRICS international conference on Measurement and modeling of computer systems - SIGMETRICS '08  
OSprof is a versatile, portable, and efficient profiling methodology based on the analysis of latency distributions.  ...  These latency distributions are presented as histograms and contain distinct groups of data, called peaks, that characterize the overall behavior of the running code.  ...  The idea for this work and an initial design were inspired while on internship at IBM Haifa Research Labs.  ... 
doi:10.1145/1375457.1375489 dblp:conf/sigmetrics/TraegerDZ08 fatcat:uapwzc7hejh7xhymdqrkr6krma

Response time driven multimedia data objects allocation for browsing documents in distributed environments

Siu-Kai So, I. Ahmad, K. Karlapalem
1999 IEEE Transactions on Knowledge and Data Engineering  
Distributed information processing, in many world wide web applications, requires access, transfer, and synchronization of large multimedia data objects (MDOs) (such as, audio, video, and images) across  ...  Moreover, the end users have started expecting very fast response times and high quality of service.  ...  This operation can be applied to each MDO, and an MDO can be moved to any one of the m -1 sites at which it is not located.  ... 
doi:10.1109/69.774100 fatcat:25uibfcirrcvdk4cpakiauvmxm

A metric for sets of trajectories that is practical and mathematically consistent [article]

José Bento, Jia Jie Zhu
2020 arXiv   pre-print
Metrics on the space of sets of trajectories are important for scientists in the field of computer vision, machine learning, robotics, and general artificial intelligence.  ...  Our notion of closeness is the first demonstrating the following three features: the metric 1) can be quickly computed, 2) incorporates confusion of trajectories' identity in an optimal way, and 3) is  ...  We have K maxcount (Σ) = 1 and K maxcount (Σ ) = 1 but K maxcount (Σ • Σ) = ∞ > K maxcount (Σ ) + K maxcount (Σ). Proof of Theorem 6.  ... 
arXiv:1601.03094v3 fatcat:ohjxwcq2xve55kne2nx5nyxfdi

A New Approach for License Plate Detection and Localization: Between Reality and Applicability

Akram A. Moustafa, Mohammed-Issa Riad Mousa Jaradat
2015 International Business Research  
The results reveal that the proposed algorithm works perfectly on all kinds of license plates with 93.43% efficiency rate. </p>  ...  A competent algorithm is proposed in this paper for number plate detection and localization based on segmentation and morphological operators.  ...  In fact, the objects and their backgrounds are mostly complex in real-world images, therefore it is not always possible to achieve required best threshold.  ... 
doi:10.5539/ibr.v8n11p13 fatcat:nblls3w65rbyxhxkp3zaw2ku64

In-Network Processing of an Iceberg Join Query in Wireless Sensor Networks Based on 2-Way Fragment Semijoins

Hyunchul Kang
2015 Sensors  
This sequence filters non-joinable tuples in an energy-efficient way in WSNs.  ...  An iceberg join is a special type of join where only those joined tuples whose cardinality exceeds a certain threshold (called iceberg threshold) are qualified for the result.  ...  For example, based on the scenario in vehicle surveillance presented in [2] , let us consider the identification of the moving objects that have passed two particular regions in WSNs.  ... 
doi:10.3390/s150306105 pmid:25774710 pmcid:PMC4435171 fatcat:vf2krpiebrcjlot3qx4ucvotk4

Optimizing the Cyclic K-conflict-free Shortest Path Problem in a Network-on-chip

Boureima Zerbo, Marc Sevaux, Andr'e Rossi, Jean-Charles Cr'eput
2017 International Journal of Computer & Software Engineering  
Adding or not the Dijkstra component, we study the impact of construction and improvement operations when adjusting the maxCount, maxConstruct, and maxImprove algorithm parameters.  ...  In the iterated random search (IRS) method, the combination of construction/improvement operations are set to the values (maxCount,maxConstruct,maxImprove) = (50,1000,1000).  ... 
doi:10.15344/2456-4451/2017/115 fatcat:ddmwnae3gvehthpr35z24h4viy

The Neuroid revisited: A heuristic approach to model neural spike trains

Erick Javier Argüello Prada, Ignacio Antonio Buscema Arteaga, Antonio José D'Alessandro Martínez
2017 Research on Biomedical Engineering  
Methods: In an attempt to address this issue, a comparison between the Neuroid and the leaky-integrate-and-fire (LIF) model in terms of accuracy and computational cost was performed.  ...  This is an Open Access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original  ...  Minaya Villasana for her valuable ideas and useful observations during the realization of this article.  ... 
doi:10.1590/2446-4740.02617 fatcat:f5pz4olwkrg55d2uv663g73pva

A novel coordinated resource provisioning approach for cooperative cloud market

K Hemant Kumar Reddy, Geetika Mudali, Diptendu Sinha Roy
2017 Journal of Cloud Computing: Advances, Systems and Applications  
The efficiency of the proposed algorithm has been tested using synthetic data and the simulation results presented herein demonstrate the superiority of the proposed approach over its non-coordinated counterparts  ...  One of the most exciting and recent research areas in cloud computing has been cloud federations that can mitigate the aforesaid problems.  ...  In other words, this coordination mechanism takes care of the fact that all cloud providers maintain a minimal number of virtual machines (threshold) for starting a new datacenter and the threshold value  ... 
doi:10.1186/s13677-017-0078-z fatcat:xt6mqgomxfapfd3fxf33t75txa

A Dynamic Data Structure to Efficiently Find the Points below a Line and Estimate Their Number

Bart Kuijpers, Peter Revesz
2017 ISPRS International Journal of Geo-Information  
Acknowledgments: In this paper, Section 2 is based on the preliminary conference paper by Revesz [17] , while Sections 3 and 4 contain completely new results.  ...  Selectivity estimation for moving point objects was considered by Anderson and Revesz [8] , Choi and Chung [9] and Sun et al.  ...  The problem of estimating the number of points below a line is applicable to new cases of selectivity estimation in spatio-temporal or moving object database querying.  ... 
doi:10.3390/ijgi6030082 fatcat:mwozgjtfandznki5iuc4pb4z3q

Simplifying process model abstraction: Techniques for generating model names

Henrik Leopold, Jan Mendling, Hajo A. Reijers, Marcello La Rosa
2014 Information Systems  
A concrete problem is thus how to maintain these large repositories in such a way that their complexity does not hamper their practical usefulness as a means to describe and communicate business operations  ...  The increased adoption of business process management approaches, tools, and practices has led organizations to accumulate large collections of business process models.  ...  The mass of documentation stored in a process model repository poses considerable challenges for efficient and effective use of these models.  ... 
doi:10.1016/ fatcat:oulvrbfk4beexgwe4q4i2pkdlm
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