nonlocal formulation
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Mathematics ◽  
2020 ◽  
Vol 8 (12) ◽  
pp. 2111
Author(s):  
Mitică CRAUS ◽  
Silviu-Dumitru PAVĂL

In this paper we propose and compare two methods to optimize the numerical computations for the diffusion term in a nonlocal formulation for a reaction-diffusion equation. The diffusion term is particularly computationally intensive due to the integral formulation, and thus finding a better way of computing its numerical approximation could be of interest, given that the numerical analysis usually takes place on large input domains having more than one dimension. After introducing the general reaction-diffusion model, we discuss a numerical approximation scheme for the diffusion term, based on a finite difference method. In the next sections we propose two algorithms to solve the numerical approximation scheme, focusing on finding a way to improve the time performance. While the first algorithm (sequential) is used as a baseline for performance measurement, the second algorithm (parallel) is implemented using two different memory-sharing parallelization technologies: Open Multi-Processing (OpenMP) and CUDA. All the results were obtained by using the model in image processing applications such as image restoration and segmentation.


2020 ◽  
Vol 252 ◽  
pp. 112688
Author(s):  
Andrea Apuzzo ◽  
Chiara Bartolomeo ◽  
Raimondo Luciano ◽  
Daniela Scorza

2017 ◽  
Vol 11 (2) ◽  
pp. 403-413 ◽  
Author(s):  
Zhong-Xian Li ◽  
Bo Zhong ◽  
Yanchao Shi ◽  
Jia-Bao Yan

2017 ◽  
Vol 108 ◽  
pp. 315-324 ◽  
Author(s):  
Andrea Apuzzo ◽  
Raffaele Barretta ◽  
Marko Canadija ◽  
Luciano Feo ◽  
Raimondo Luciano ◽  
...  

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