Abstract
In the numerical approximation of fractional order derivatives, the crucial point is to balance the computing complexity and the computing accuracy. We proposed a piecewise memory principle for fractional derivatives, in which the past history is divided into several segments instead of discarded. The piecewise approximation is performed on each segment. Error estimation of piecewise memory principle is analyzed also. Numerical examples show that the contradiction of computing accuracy and complexity is effectively relaxed and the piecewise memory principle is superior to the existing short, variable and equal-weight memory principles. The impacts of the memory length, step size and segment size are also discussed.
Acknowledgements
This research work is supported in part by the National Key Research and Development Program of China under Grant no. 2017YFB0202100, 2016YFB0200400, National Natural Science Foundation of China (NSFC) under Grant no. 61402039, Major research plan of NSFC under Grants no. 91430218, 91530324, China Postdoctoral Science Foundation (CPSF) under Grant no. 2014M562570, Special Financial Grant from CPSF under Grant no. 2015T81127, Science and Technology on reactor system design technology laboratory under Grant no. SQ-KFKT-02-2016-04.
We would like to thank the anonymous reviewers for their helpful comments as well.
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© 2017 Diogenes Co., Sofia
Articles in the same Issue
- Frontmatter
- Editorial Note
- FCAA related news, events and books (FCAA–volume 20–4–2017)
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- A computational approach for the solution of a class of variable-order fractional integro-differential equations with weakly singular kernels
- Shopt Paper
- Analytic approximate solutions for a class of variable order fractional differential equations using the polynomial least squares method
- Corrigendum
- Corrigendum: Fractional integral on martingale hardy spaces with variable exponents
Articles in the same Issue
- Frontmatter
- Editorial Note
- FCAA related news, events and books (FCAA–volume 20–4–2017)
- Research Paper
- Perturbation methods for nonlocal Kirchhoff–type problems
- Research Paper
- On infinite order differential operators in fractional viscoelasticity
- Research Paper
- Fundamental solution of the multi-dimensional time fractional telegraph equation
- Research Paper
- Robustness and convergence of fractional systems and their applications to adaptive schemes
- Research Paper
- Stability analysis of linear distributed order fractional systems with distributed delays
- Research Paper
- Fractional sobolev spaces and functions of bounded variation of one variable
- Research Paper
- Approximate controllability for fractional differential equations of sobolev type via properties on resolvent operators
- Research Paper
- On moduli of smoothness and averaged differences of fractional order
- Research Paper
- A piecewise memory principle for fractional derivatives
- Research Paper
- A computational approach for the solution of a class of variable-order fractional integro-differential equations with weakly singular kernels
- Shopt Paper
- Analytic approximate solutions for a class of variable order fractional differential equations using the polynomial least squares method
- Corrigendum
- Corrigendum: Fractional integral on martingale hardy spaces with variable exponents