12,653 Hits in 1.9 sec

Efficient Rank-Based Diffusion Process with Assured Convergence

Daniel Carlos Guimarães Pedronette, Lucas Pascotti Valem, Longin Jan Latecki
2021 Journal of Imaging  
The obtained method is capable of efficiently approximating a diffusion process by exploiting rank-based information, while assuring its convergence.  ...  In this paper, we propose an efficient Rank-based Diffusion Process which combines both approaches and avoids the drawbacks of each one.  ...  In this scenario, the Rank Diffusion Process with Assured Convergence (RDPAC) is proposed in this paper based on an efficient formulation capable of avoiding the computation of small and irrelevant similarity  ... 
doi:10.3390/jimaging7030049 pmid:34460705 fatcat:wulsw3xk5veizecta5ugge27ha

Stochastic Fractal Search Algorithm for Template Matching with Lateral Inhibition

Qifang Luo, Sen Zhang, Yongquan Zhou
2017 Scientific Programming  
Template matching is a basic and crucial process for image processing.  ...  Our simulation results show that LI-SFS is more effective and robust for this template matching mission than other algorithms based on LI.  ...  By using the diffusion phenomenon that reveals fractals, SFS offers a new insight to solve complex optimization problems with fast convergence rate and high search accuracy.  ... 
doi:10.1155/2017/1803934 fatcat:bralry7xyzb4nlnp7nda5k4cza

Policy transfer, neo-liberalism or coercive institutional isomorphism? Explaining the emergence of a regulatory regime for quality assurance in the Hong Kong higher education sector

Darryl S.L. Jarvis
2014 Policy & Society  
Typically, this phenomenon is explained as a process of policy diffusion, the advent of marketization, the spread of neoliberalism, massification and, concomitantly, the emergence of a 'global market'  ...  The spread of quality assurance (QA) regimes in higher education has been an explosive phenomenon over the last 25 years.  ...  the process of diffusion even significant?  ... 
doi:10.1016/j.polsoc.2014.09.003 fatcat:wrurixh6prcwnhrpdp5nivxoxy

Multicriteria Evaluation in Spatial Planning: A Participatory Methodological Approach

Anastasia Stratigea, Chrysaida-Aliki Papadopoulou
2013 Territorio Italia  
.), increasing thus the effectiveness of both the process and the outcome of planning efforts.  ...  The focus of the present paper is on the development of a methodological framework that can accommodate participatory tools at the stage of the evaluation in the planning process.  ...  From these results, it is shown that a considerable number of stakeholders' groups (6 out of 10 groups -G5, G2, G1, G3, G9 and G4) converge with the ranking of scenarios, as emerging from the multicriteria  ... 
doi:10.14609/ti_5e doaj:d32a05ad09e8462abbbfae405c9059e7 fatcat:6eniv6nijjdf3gfg6qb6enk6ne

Image Deblurring Via Total Variation Based Structured Sparse Model Selection

Liyan Ma, Tieyong Zeng
2015 Journal of Scientific Computing  
Other related methods will also be addressed if time permitted. 10:45 C10-2(invited) Fast retinal image enhancement using robust inverse diffusion equation and blockwise filtering  ...  To overcome this, the structured sparse model selection (SSMS) over a family of learned orthogonal bases was proposed recently.  ...  The second stage should be also very efficient since it fits well for GPU computing and 5-10 iterations are usually sufficient for convergence.  ... 
doi:10.1007/s10915-015-0067-7 fatcat:cbpymhfkrrfz5cpqci4kjyqzbe

To what extent does transnational communication drive cross-national policy convergence? The impact of the bologna-process on domestic higher education policies

Eva M. Voegtle, Christoph Knill, Michael Dobbins
2010 Higher Education  
This study investigates if transnational communication in the context of the Bologna Process (BP) has led to the convergence of higher education (HE) policies.  ...  However, convergence towards the HE policies of Bologna participants is detectable in the control group, albeit to a lesser degree. Thus, some HE policies have diffused beyond the members of the BP.  ...  All these data was fed into the online based system to assure comparability with the answers given by the national experts.  ... 
doi:10.1007/s10734-010-9326-6 fatcat:dbpxowjcqbaudfz4qiduprlrzy

On the solution of non-linear diffusion equation

Reijo Kouhia
2014 Rakenteiden Mekaniikka  
A common procedure is to use Picard's iteration with the trapezoidal rule. However, in highly non-linear problems the convergence of Picard's iteration is untolerably slow.  ...  Solution of the diffusion equation is usually performed with the finite element discretization for the spatial elliptic part of the equation and the time dependency is integrated via some difference scheme  ...  Convergence of the iterative process (39) is assured if E < 1, (40) where · denotes matrix norm. This condition is, however, too restrictive in practical computations.  ... 
doaj:70b6ce783bd241fb99bded05bb6309ae fatcat:oeu3wi5yxnaanaevs4efugrzma

Is Telecommunications Productivity Characterized by Steady State Conditions? Some Empirical Evidence for 13 OECD Countries

Claudia Curi, Paolo Mancuso
2009 Social Science Research Network  
This paper studies the convergence process, or lack thereof, of Total Factor Productivity (TFP) for a panel of 13 OECD countries over the period 1979-2007, adding breadth and depth to the convergence debate  ...  Our findings show a growth in TFP, mainly driven by technological process. It is boosted by an increase in production possibilities and lack of bias in input utilization.  ...  In this way we assure the choice of the best estimator in terms of efficiency and consistency.  ... 
doi:10.2139/ssrn.1842267 fatcat:hj4enb6smvd3depn6hm457742i

Debunking the Myths of Influence Maximization

Akhil Arora, Sainyam Galhotra, Sayan Ranu
2017 Proceedings of the 2017 ACM International Conference on Management of Data - SIGMOD '17  
techniques proposed over the last decade have definitely enriched the field, unfortunately, experimental reports on existing techniques fall short in validity and integrity since many comparisons are not based  ...  Acknowledgements We would like to thank the authors of all the state-of-the-art techniques for sharing their code with us.  ...  set S, at the end of the information diffusion process.  ... 
doi:10.1145/3035918.3035924 dblp:conf/sigmod/AroraGR17 fatcat:5ojkfq6xorgjndfarvavfnaxre

Control of heat diffusion in arc welding using differential flatness theory and nonlinear Kalman Filtering

Gerasimos G. Rigatos
2015 IFAC-PapersOnLine  
The paper proposes a distributed parameter systems control method that is based on differential flatness theory, aiming at solving the problem of heat distribution control in the arcwelding process.  ...  Control of the heat diffusion in the welded metal is of primary importance for successful welding of high quality (the latter being a prerequisite for efficient ship building).  ...  Conclusions A method for feedback control of the nonlinear heat diffusion PDE associated with the arc welding process has been provided.  ... 
doi:10.1016/j.ifacol.2015.06.277 fatcat:ogqnja7ozvdzxjuyypv2in3hfa

Control of Heat Diffusion in Arc Welding Using Differential Flatness Theory and Nonlinear Kalman Filtering

G. Rigatos, P. Siano
2016 Intelligent Industrial Systems  
The paper proposes a distributed parameter systems control method that is based on differential flatness theory, aiming at solving the problem of heat distribution control in the arcwelding process.  ...  Control of the heat diffusion in the welded metal is of primary importance for successful welding of high quality (the latter being a prerequisite for efficient ship building).  ...  Conclusions A method for feedback control of the nonlinear heat diffusion PDE associated with the arc welding process has been provided.  ... 
doi:10.1007/s40903-016-0035-z fatcat:vaflhjphynhcfibiiwq7nk4xli

Introducing innovation in social networks: A cost-benefit analysis of entry point selection

Maria Fasli, Ramon Hermoso, Elton Sbruzzi, Vania Sena
2015 2015 Third World Conference on Complex Systems (WCCS)  
We present a set of experiments based on two real social network datasets and also a synthetic one that shows the effects of deploying our mechanism.  ...  almost in an instant, being able to identify the best initial entry points for introducing innovation (be it a service or product) is key to aiding its acceptance and enhancing its prospects of further diffusion  ...  In fact, at the start of the diffusion process and when the SISM Degree and Betweenness centrality measures are used, the random selection shows a higher Finally, Figure 6 shows that the convergence  ... 
doi:10.1109/icocs.2015.7483238 fatcat:7rgtuus5njgybgcjhvyh2rns5y

Stereo Matching with Mumford-Shah Regularization and Occlusion Handling

R Ben-Ari, N Sochen
2010 IEEE Transactions on Pattern Analysis and Machine Intelligence  
A comparison on the Middlebury stereo benchmark with sub-pixel accuracies shows that our method is currently among the top-ranked stereo matching algorithms.  ...  The evaluation process is based on concurrent minimization of two coupled energy functionals, one for domain segmentation (occluded vs. visible) and the other for disparity evaluation.  ...  Seeking for piecewise smooth modeling of the disparity map with abrupt crossing in between, we propose a novel regularizer based on the Mumford-Shah (MS) functional [31] in its Γ-convergence approximation  ... 
doi:10.1109/tpami.2010.32 pmid:20847394 fatcat:pcfkf63krrhmnlyr5g7mty27q4

A Systematic Comparison of Dynamic Load Balancing Algorithms for Massively Parallel Rigid Particle Dynamics [article]

Sebastian Eibl, Ulrich Rüde
2018 arXiv   pre-print
As compute power increases with time, more involved and larger simulations become possible. However, it gets increasingly difficult to efficiently use the provided computational resources.  ...  Scaling experiments are shown for up to over one million processes. The performance of each algorithm is analyzed with respect to the quality of the load balancing and its runtime costs.  ...  sizes which were run on 262,144 cores with 1,048,576 MPI ranks in parallel.  ... 
arXiv:1808.00829v1 fatcat:dicmzztfk5ejbfhqtgx5ifosae

Page 8951 of Mathematical Reviews Vol. , Issue 99m [page]

1999 Mathematical Reviews  
), the authors give a necessary and sufficient condition for the weak convergence of the scaled queue length process.  ...  An efficient Lagrangian relaxation based heuristic procedure for find- ing bounds and solutions to the problem is demonstrated, and computational results from a variety of problem instances are re- ported  ... 
« Previous Showing results 1 — 15 out of 12,653 results