Haroon Rashid

Academy of Sciences Malaysia

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H. Ahmad

University of Malaya

Muhammad Rehan

King Fahd University of Petroleum and Minerals

Norhana Arsad

National University of Malaysia

Canras Batunlu

Middle East Technical University

Nowshad Amin

National University of Malaysia

Muhammad Tufail

Pakistan Institute of Engineering and Applied Sciences

Mamun Bin Ibne Reaz

National University of Malaysia

Norazida Ali

National University of Malaysia

Mohd Saiful Dzulkefly Zan

National University of Malaysia

Norazreen Abd Aziz

National University of Malaysia

Cooperative Institutions

National University of Malaysia

Pakistan Institute of Engineering and Applied Sciences

National Institutes of Biotechnology Malaysia

University of Malaya

Middle East Technical University

Fujian Normal University

COMSATS University Islamabad

Universiti Tenaga Nasional

Sanming University

University of Peshawar

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Adaptive fully-distributed sign-consensus control approach for nonlinear multi-agent systems over a signed graph

Transactions of the Institute of Measurement and Control (2021)

Amina Shams Muhammad Rehan Muhammad Tufail Haroon Rashid

In this paper, the notion of sign-consensus for the Lipschitz nonlinear multi-agents over a signed graph is introduced and controller design conditions are provided for realizing consensus among signs of states of agents. The previous works on sign-consensus are limited to the linear systems only. The attainment of sign-consensus for the nonlinear multi-agent systems is a non-trivial control problem, for which Lipschitz nonlinear dynamics are reformulated using the linear parameter varying (LPV) transformation. To guarantee the sign-consensus in a network of multiple agents, fully-distributed adaptive protocol is applied using reformulated Lipschitz nonlinear dynamics, and two design conditions are provided based on the Lipschitz constant oriented and LPV-based approaches. The first approach is comparatively less computationally complex while LPV approach holds significance for developing less conservative sign-consensus control scheme. To the best of our knowledge, distributed sign consensus methods for Lipschitz systems, based on LPV formulation, have been analyzed for the first time. The proposed approach is adaptive and can be regarded as fully-distributed, as it does not require the central knowledge of graph properties. Further, results are extended for nonlinear systems undergoing disturbances and ultimate boundedness of sign-consensus error is guaranteed. Numerical simulations on groups of Chua’s circuits and mechanical oscillators are presented to validate the results.

Signed graph

10.1177/01423312211031773

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Citations (2)

A Practical Performance Comparison of Two Parallel Fast Fourier Transform Algorithms on Cluster of PCs

IEEJ Transactions on Electronics Information and Systems (2004)

Kalim Qureshi Haroon Rashid

In this paper, we present the performance analysis of two parallel Fast Fourier Transform algorithms, binary-exchange and transpose algorithms. These two algorithms were implemented and tested on a cluster of PCs using Message Passing Interface (MPI). The binary-exchange algorithm implementation was showing less processing and communication time than transpose algorithm.

Transpose

Cooley–Tukey FFT algorithm

10.1541/ieejeiss.124.2382

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Nutrient leaching after subtropical forest conversions and its implications for soil fertility

Forest Ecology and Management (2024)

Haroon Rashid Xinyao Sun Fuzhong Wu Xiangyin Ni

Soil nutrients

10.1016/j.foreco.2024.122044

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Citations (1)

Delay-range-dependent static anti-windup compensator design for nonlinear systems subjected to input-delay and saturation

Journal of the Franklin Institute (2017)

Najam us Saqib Muhammad Rehan Muntazir Hussain Naeem Iqbal Haroon Rashid

Saturation (graph theory)

10.1016/j.jfranklin.2017.07.028

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Citations (13)

A Phonemic and Acoustic Analysis of Hindko Fricatives

Acta Linguistica Asiatica (2015)

Haroon Rashid Abdul Qadir Khan

The Hindko language is mainly spoken in the province of Khyber Pukhtunkhaw, Pakistan. It relates to the Indo-Aryan family of languages. This paper focusses on the phonemic and acoustic analysis of Hindko fricatives. The phonemic analysis identifies that Hindko has eight fricatives. The acoustic analysis aims to explore temporal and spectral characteristics of these fricatives. The acoustic analysis discloses that Hindko fricatives are distinguishable on the basis of the temporal properties such as friction duration and spectral cues like turbulence noise.

Spectral Analysis

10.4312/ala.4.3.71-81

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Carbon and Nutrient Release During Chinese Fir Litter Decomposition: A Synthesis Across China's Forests

Shuotian Lai Björn Berg Haroon Rashid Fuzhong Wu Qiuxia Wu

Chinese fir (Cunninghamia lanceolata) is an important tree species for subtropical forest plantation, and its litter decomposition has been studied for more than 30 years. However, the decomposition pattern and drivers of Chinese fir litter across subtropical forests are not fully understood. Here, we conducted a continental synthesis from 61 studies that reported the mass loss and release rates of carbon (C), nitrogen (N), phosphorous (P), potassium (K), calcium (Ca) and magnesium (Mg) during the first year of decomposition. The average decomposition rates of needle, twig, root and cone litter were 0.493, 0.319, 0.551 and 0.372 yr-1, respectively. The decomposition rates of C and cellulose for needle litter were 0.638 and 0.623 yr-1, and those of K, Ca and Mg were 2.27, 0.948 and 0.537 yr-1, respectively. The orthogonal partial least square regression model showed that the decomposition rate of Chinese fir needle litter was strongly controlled by soil N concentration, mean annual temperature (and precipitation) and litter initial C/N ratio. Additionally, increased N deposition and acid rain decreased while elevated ultraviolet-B radiation increased the litter mass loss, and atmospheric N deposition facilitated elemental release from decomposing Chinese fir litter. These results provided a comprehensive assessment of Chinese fir litter decomposition, which is important to elucidate soil biogeochemical cycles in subtropical plantations.

Litter

Douglas fir

Nutrient cycle

Carbon fibers

Plant litter

10.2139/ssrn.4583993

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Citations (0)

Butt fusion welding of polyethylene pipes

Haroon Rashid

Fusion welding

Butt welding

Source

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Citations (2)

Investigation of RF Sputtering Power Effects on Tungsten Disulfide Thin Films for Enhanced Photovoltaic Performance

Haroon Rashid Nowshad Amin Ashwaq Yahya Ali Al-Mahbashi Illani Binti Mohd Nawi

This study investigates the impact of deposition power on WS2 thin films grown on soda lime glass substrates using RF magnetron sputtering at room temperature. Variations in structural, morphological, and electrical properties are examined to understand the influence of thermal energy changes during growth. Characterization techniques include X-ray diffraction (XRD) for crystalline structure, field emission scanning electron microscopy (FESEM) for surface morphology, and Hall effect measurements for electrical properties. XRD analysis reveals two prominent WS2 peaks at 2θ = 34.30° and 2θ = 60.88° corresponding to (100)HEX and (110)HEX reflection planes, respectively. Film thickness ranges from 156.3 nm to 908.1 nm, yielding smooth and dense surface morphology. Bulk carrier concentration falls within the 10 ¹⁸ /cm ³ range, with a minimum resistivity of 1.27 x 10 ^-1 Ω.cm observed for 200 W deposition. Optimal S/W ratios closely resemble the WS2 structure for films deposited at 200 W. Additionally, an AFM analysis showcases low average surface roughness at 1.68 nm. By exploring the effects of deposition power on WS2 thin films, this research enhances our understanding of their structural, morphological, and electrical characteristics, with implications for potential photovoltaic applications.

Deposition

10.1109/sennano57767.2023.10352561

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Advancement of CMOS Schmitt Trigger Circuits

Modern Applied Science (2012)

Wassan M. Kader Haroon Rashid Mamun Bin Ibne Reaz Mohammad Arif Sobhan Bhuiyan

Schmitt triggers are electronic comparators that are widely used to enhance the immunity of circuits to noise and disturbances and are inherent components of various emerging applications. Conventional Schmitt triggers, composed of operational amplifiers, suffer from some inevitable drawbacks which are not prominent in CMOS Schmitt triggers. In this paper, a review on the advancement of Schmitt trigger circuits are illustrated in different literatures is discussed with their merits and demerits.

Schmitt trigger

Noise immunity

10.5539/mas.v6n12p51

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Citations (26)

Design of a Low Voltage Schmitt Trigger in 0.18 um CMOS Process With Tunable Hysteresis

Modern Applied Science (2013)

Haroon Rashid Mamun Bin Ibne Reaz Md. Syedul Amin Hafizah Husain

Schmitt triggers are commonly used in communication and signal processing techniques to solve noise problem. A low voltage Schmitt trigger circuit with tunable hysteresis is proposed in this paper. For obtaining hysteresis under low voltage, a cross-coupled static inverter pair is used. By adjusting the symmetrical load operation, the hysteresis of the Schmitt trigger is varied. The cross-coupled inverter pair regenerative operation is controlled by it. Designed in 0.18 um CMOS process technology, the simulation results show that the proposed Schmitt trigger circuit's triggering voltage can be adjusted approximately 0.5 V to 1.2 V. The proposed design is suitable to be implemented in buffers, sub-threshold SRAMs, retinal focal plane sensors, wireless transponders and pulse width modulation circuits.

Schmitt trigger

Hysteresis

SIGNAL (programming language)

10.5539/mas.v7n4p47

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Citations (12)