Complex Fuzzy Rough Aggregation Operators and their Applications in EDAS for Multi-Criteria Group Decision-Making

Faiz Muhammad Khan,Naila Bibi,Saleem Abdullah,Azmat Ullah 한국지능시스템학회 2023 INTERNATIONAL JOURNAL of FUZZY LOGIC and INTELLIGE Vol.23 No.3

One of the notable advantages of the complex fuzzy set is its ability to incorporate not only satisfaction and dissatisfaction but also the absence of vague information in two-dimensional scenarios. By combining a fuzzy rough set with a complex fuzzy set, this study aims to provide a powerful and versatile tool for multi-criteria group decision-making (MCGDM) in complex and uncertain situations. This approach, based on EDAS (evaluation based ondistance from average solution) method allows decision-makers to consider multiple criteria, account for uncertainty and vagueness, and make informed choices based on a wider range of factors. The main goal of this study is to introduce complex fuzzy (CF) rough averaging aggregation and geometric aggregation operators and embed these operators in EDAS to obtain remarkable results in MCGDM. Furthermore, we propose the CF rough weighted averaging (CFRWA), CF rough ordered weighted averaging (CFROWA), and CF rough hybrid averaging (CFRHA) aggregation operators. Additionally, we present the concepts of CF rough weighted geometric (CFRWG), CF rough ordered weighted geometric (CFROWG), and CF rough hybrid geometric (CFRHG) aggregation operators. A new score function is defined for the proposed method. The basic and useful aspects of the explored operators were discussed in detail. Next, a stepwise algorithm of the CFR-EDAS method is demonstrated to utilize the proposed approach. Moreover, a real-life numerical problem is presented for the developed model. Finally, a comparison of the explored method with various existing methods is discussed, demonstrating that the exploring model is more effective and advantageous than existing approaches.

Design Of Photovoltaic Tracking System For Large Scale Panels Using A Reference Solar Panel To Improve System Efficiency

Faiz Majeed,Dania Batool,Jonghoon Kim 전력전자학회 2021 전력전자학술대회 논문집 Vol.2021 No.11

The existing energy resources offer a huge amount of potential to threaten the survival of planet Earth. To overcome such disasters as climate change, solar energy offers a solution. In this regard, many types of research have been done to produce cost-effective and efficient solar energy. There are lot of factors on which efficiency of solar panel depends, finding the maximum power point angle is one of those factors and the presented work is also related to it. This paper proposes a system that is intelligent enough to find the angle of the solar panel where maximum energy is produced. The maximum energy producing angle is measured on only one solar panel, the information of the maximum energy producing angle is shared with the whole system and all the solar panels are moved accordingly. This paper proposes to use the proportional integral differential controller to move the solar panels to maximize energy producing angle. This design helps in saving computational load from all solar panels and in the production of maximum energy.

Emotional intelligence in medical students: should we be assessing this more vigorously during the admissions process?

Faiz Ahmed Shaikh,Jenna Gilmour 한국의학교육학회 2019 Korean journal of medical education Vol.31 No.2

Improved Stability and Damping Characteristics of LCL-Filter Based Distributed Generation System

Faiz Muhammad Talib,Khan Danish,Khan Muhammad Mansoor,Ali Abdar,Tang Houjun 대한전기학회 2021 Journal of Electrical Engineering & Technology Vol.16 No.3

The voltage source inverter is a key component in the distributed power generation systems where the LCL -fi lter is a popular choice for interfacing with the grid. However, the well-known resonance issue associated with the LCL -fi lter deteriorates the control performance and risk the inverter system stability. The inverter control design plays a signifi cant role to ensure the quality of the injected grid current and stable operation according to the requirements of grid interconnection standards. This paper deals with an alternative control design method that modifi es the internal damping loop design to improve the stability and damping characteristics. The proposed design employs a compensator across the fi lter and feedbacks the output of the augmented plant at the reference voltage point, and named as parallel feedforward compensation method. The fi lter capacitor current measured for damping loop implementation, and a high-pass fi lter compensator adopted in the proposed confi guration. The proportional capacitor current feedback compensation method is considered for comparative studies. The current loop stability and control performance characteristics are investigated in detail under the resonance frequency and fi lter parameters variation condition. The signifi cant outcomes of the proposed scheme are faster dynamic response, higher delay compensation capability, relatively improved resonance suppression, and potential for better tracking performance. An experimental prototype is developed to validate the effi cacy of the proposed method.

A feasible route for dynamic reconfigurable large scale battery pack to optimize hardware and complexity

Faiz Majeed(페이즈 마지드),Dania Batool(다니아 바툴),Jonghoon Kim(김종훈) 전력전자학회 2021 전력전자학술대회 논문집 Vol.2021 No.7

Behaviour of Carbon and Basalt Fibres Reinforced Fly Ash Geopolymer at Elevated Temperatures

Faiz Shaikh,Sharany Haque 한국콘크리트학회 2018 International Journal of Concrete Structures and M Vol.12 No.4

This paper presents the behaviour of potassium activators synthesized fly ash geopolymer containing carbon and basalt fibre at ambient and elevated temperature. Six series of fly ash based geopolymer were cast where carbon and basalt fibre were added as 0.5, 1 and 1.5% by weight of fly ash. One extra control series without any fibre was also cast. Each series of samples were tested at ambient temperature and also heated at 200, 400, 600 and 800℃ and thus a total of 35 series of samples were tested in this study. The result shows that the geopolymer containing 1 wt% basalt and 1 wt% carbon fibre exhibited better compressive strength, lower volumetric shrinkage and mass loss than other fibre contents. Among two fibres composites, the carbon fibre geopolymer exhibited better performance than its basalt fibre counterpart regardless of temperature. The microstructure of carbon fibre reinforced geopolymer composite is more compact containing fewer pores/voids than its basalt based counterpart at elevated temperatures. The results also support the fact that carbon fibre is better than basalt fibre at elevated temperature and showed better bonding with geopolymer at elevated temperature.

Effect of Cracking on Corrosion of Steel in Concrete

Faiz Uddin Ahmed Shaikh 한국콘크리트학회 2018 International Journal of Concrete Structures and M Vol.12 No.1

It is generally recognized that cracks provide easy access to ingress of chlorides in concrete and hence, the initiation of corrosion of steel in cracked concrete occurs at early stage. However, wide variety of results on the effect of crack widths on corrosion of steel in concrete are reported in many studies. Apart from crack width, the crack depths, cracking frequency and healing of cracks also influence the corrosion of steel in concrete. This paper presents a comprehensive review and summarised the results on the effect of cracking on corrosion of steel in concrete. The effect of crack widths on the diffusion of chlorides ions and carbon-dioxide is also discussed in this paper. Among all available results, a correlation between the corrosion current and the crack widths up to 0.3 mm can be established, however, no distinct trends are observed beyond that crack width. Conflicting results on the effect of crack widths on chloride ion diffusion are also reported. The longitudinal crack causes more severe corrosion of steel in concrete than transverse cracks of same width. Cracked concrete containing supplementary cementitious materials exhibited superior corrosion resistance than cracked ordinary Portland cement concrete of same width of transverse as well as longitudinal cracks. The same is also true in the case of lower water–binder ratios of cracked concrete. The increase in crack depth increased the chloride diffusion; however, the corrosion test shows an opposite trend. Conflicting results on the effect of crack frequency on corrosion of steel are also reported.

Altered brain connectivity associated with behavioral impairments in DNA topoisomerase IIIβ mutant mice

Faiz Ur Rahman,You-Rim Kim,Su Jin Kim,Ho-Young Lee,Hyoung-Chin Kim,Ki-Hoan Nam 한국실험동물학회 2021 한국실험동물학회 학술발표대회 논문집 Vol.2021 No.7

Topoisomerases are crucial for solving DNA topological problems by making transient single-strand DNA or double-strand DNA nick. Topoisomerase IIIβ (Top3β) a member of topoisomerase family of enzymes and a major topoisomerase with dual-activity associated with neurodevelopment and mental dysfunction. The aim of this study was to examine the brain connectivities associated with behavioral alteration of Top3β mutant mice. We generated Top3β mutant (Top3β-/-) mice and determined behavioral characteristics of the mutant mice using an animal phenotype analysis platform which included open field test, grip strength, light-dark box, rota-rod, forced swim, Y-maze, fear conditioning and acoustic startle/prepulse inhibition analysis. Brain functional connectivity was also analyzed by PET/CT with [18F] fluorodeoxyglucose technique. Top3β-/- mice shows decreased anxiety/depression-like behaviors and circadian activity in several tests. Altered neuromuscular functions was also observed in Top3β deficient mice. Notably, the expression of Top3β was recognized clearly in the central nervous system, suggesting its role in controlling behavioral phenotype in mice. The functional brain imaging analysis revealed that several brain regions associated with neurodevelopmental and psychiatric disorders of mutant Top3β mice. The Top3β mutation induced significant changes in mouse behavior, which might be mediated by alterations in connectivity of its brain regions. These findings could provide a useful guide of brain disorders specific to Top3β mutation.

Determination and Characterization of Thermostable Esterolytic Activity from a Novel Thermophilic Bacterium Anoxybacillus gonensis A4

Faiz, Ozlem,Colak, Ahmet,Saglam, Nagihan,Canakci, Sabriye,Belduz, Ali Osman Korean Society for Biochemistry and Molecular Biol 2007 Journal of biochemistry and molecular biology Vol.40 No.4

A novel hot spring thermophile, Anoxybacillus gonensis A4 (A. gonensis A4) was investigated in terms of capability of tributyrin degradation and characterization of its thermostable esterase activity by the hydrolysis of p-nitrophenyl butyrate (PNPB). It was observed that A. gonensis A4 has an esterase with a molecular weight of 62 kDa. The extracellular crude preparation was characterized in terms of substrate specificity, pH and temperature optima and stability, kinetic parameters and inhibition/activation behaviour towards some chemicals and metal ions. Tributyrin agar assay showed that A. gonensis A4 secreted an esterase and $V_{max}$ and $K_m$ values of its activity were found to be 800 U/L and 176.5 ${\mu}M$, respectively in the presence of PNPB substrate. The optimum temperature and pH, for A. gonensis A4 esterase was $60-80^{\circ}C$ and 5.5, respectively. Although the enzyme activity was not significantly changed by incubating crude extract solution at $30-70^{\circ}C$ for 1 h, the enzyme activity was fully lost at $80^{\circ}C$ for same incubation period. The pH-stability profile showed that original crude esterase activity increased nearly 2-fold at pH 6.0. The effect of some chemicals on crude esterase activity indicated that A. gonensis A4 produce an esterase having serine residue in active site and -SH groups were essential for its activity.

Robust H∞ State Feedback Control of NCSs with Poisson Noise and Successive Packet Dropouts

Faiz Rasool,Sing Kiong Nguang 제어·로봇·시스템학회 2015 International Journal of Control, Automation, and Vol.13 No.1

This paper examines various constraints of networked control systems (NCSs) such as network- induced random delays, successive packet dropouts and Poisson noise. Time delays are represented as modes of Markov chain and successive packet dropouts are modeled using Poisson probability distribution. For each delay-mode, a separate Poisson distribution is used with the help of an indicator function. Poisson noise is incorporated in the design to cater sudden network link failures and power shutdowns. After modeling these constraints, a stability criterion is proposed by using Lyapunov- Krasovskii functional. On the basis of the stability criteria, sufficient conditions for the existence of a robust H∞ state feedback controller are given in terms of bilinear matrix inequalities (BMIs). Later, BMIs are converted into quasi-convex linear matrix inequalities (LMIs) and are solved by using a cone complementarity linearizing algorithm. The effectiveness of the proposed scheme is elaborated with the help of two simulation examples. Moreover, the effects of successive packet dropouts and Poisson noise on H∞ performance are analyzed.