M
Muhammad Ashfaq Ahmad
Researcher at COMSATS Institute of Information Technology
Publications - 83
Citations - 1667
Muhammad Ashfaq Ahmad is an academic researcher from COMSATS Institute of Information Technology. The author has contributed to research in topics: Coherent states & Graphene. The author has an hindex of 16, co-authored 74 publications receiving 1223 citations. Previous affiliations of Muhammad Ashfaq Ahmad include Harbin Institute of Technology.
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Double image encryption by using iterative random binary encoding in gyrator domains
TL;DR: A double image encryption by using random binary encoding and gyrator transform and an iterative structure composed of the random binary encode method is designed and employed for enhancing the security of encryption algorithm.
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An ultra-high energy density flexible asymmetric supercapacitor based on hierarchical fabric decorated with 2D bimetallic oxide nanosheets and MOF-derived porous carbon polyhedra
Muhammad Sufyan Javed,Muhammad Sufyan Javed,Nusrat Shaheen,Shahid Hussain,Jinliang Li,Syed Shoaib Ahmad Shah,Yasir Abbas,Muhammad Ashfaq Ahmad,Rizwan Raza,Wenjie Mai +9 more
TL;DR: In this paper, a mesoporous 2D zinc cobaltite nanosheets on a flexible carbon cloth substrate (Zn-Co-O@CC) with an average thickness of ∼45 nm by a facile hydrothermal method at low temperature.
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Generation of hollow Gaussian beams by spatial filtering
TL;DR: It is demonstrated that hollow Gaussian beams can be obtained from Fourier transform of the differentials of a Gaussian beam, and thus they can be generated by spatial filtering in the Fourier domain with spatial filters that consist of binomial combinations of even-order Hermite polynomials.
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A Review on Encapsulation Technology from Organic Light Emitting Diodes to Organic and Perovskite Solar Cells
Qian Lu,Zhichun Yang,Xin Meng,Youfeng Yue,Muhammad Ashfaq Ahmad,Wenjun Zhang,Shasha Zhang,Yiqiang Zhang,Zonghao Liu,Wei Chen,Wei Chen +10 more
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Double image encryption by using Arnold transform and discrete fractional angular transform
Zhengjun Liu,Min Gong,Yongkang Dou,Feng Liu,Shen Lin,Muhammad Ashfaq Ahmad,Jingmin Dai,Shutian Liu +7 more
TL;DR: Based on Arnold transform and discrete fractional angular transform, a double image encryption algorithm is designed and the parameters of the two transforms serve as the additional keys for enhancing the security.