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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.
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.
Faiz Sulthan,Matsutaro Seki Techno-Press 2023 Structural monitoring and maintenance Vol.10 No.3
Indonesia has had seismic codes for earthquake-resistant structures designs since 1970 and has been updated five times to the latest in 2019. In updating the Indonesian seismic codes, seismic hazard maps for design also update, and there are changes to the Peak Ground Acceleration (PGA). Indonesian seismic design uses the concept of building performance levels consisting of Immediate occupancy (IO), Life Safety (LS), and Collapse Prevention (CP). Related to this performance level, cases still found that buildings were damaged more than their performance targets after the earthquake. Based on the above issues, this study aims to analyze the performance of base isolation design on existing target buildings and analyze the seismic fragility for a case study in Indonesia. The target building is a prototype design 8-story medium-rise residential building using the reinforced concrete moment frame structure. Seismic fragility analysis uses Incremental Dynamic Analysis (IDA) with Nonlinear Time History Analysis (NLTHA) and eleven selected ground motions based on soil classification, magnitude, fault distance, and earthquake source mechanism. The comparison result of IDA shows a trend of significant performance improvement, with the same performance level target and risk category, the base isolation structure can be used at 1.46-3.20 times higher PGA than the fixed base structure. Then the fragility analysis results show that the fixed base structure has a safety margin of 30% and a base isolation structure of 62.5% from the PGA design. This result is useful for assessing existing buildings or considering a new building's performance.
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.
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.
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.