Assessment of Meta-Heuristic and Classical Methods for GMPPT of PV System

M. Naseem,Mohammed Aslam Husain,Ahmad Faiz Minai,Ahmad Neyaz Khan,Mohd Amir,J. Dinesh Kumar,Arif Iqbal 한국전기전자재료학회 2021 Transactions on Electrical and Electronic Material Vol.22 No.3

Numerous global peak searching mechanisms have been proposed to solve the problem of energy loss due to partial shading of solar photovoltaic (PV) plants but still there is a great need for an effi cient and fast global maximum power point tracker (GMPPT). A detailed review of GMPPT based on various meta-heuristic and classical methods along with the basics of partial shading phenomenon, proper positioning of the PV panels, distributed MPPT, Field MPPT etc. will be of great help to the researchers. Till date, it looks like that not a single literature has covered these issues at a single place and thus, this article fi lls this gap by providing a detailed assessment, tabulated gist of the various GMPPT along with the basics of key issues related to partial shading of PV plants. Various classical and bio-inspired meta-heuristic based GMPPT methods have been compared in this literature. It is expected that this paper will prove to be a valuable asset and a complete reference for the academicians and professionals for further research and proper selection of a GMPPT technique.

An empirical investigation of asymmetric J-curve in the commodity trade between Pakistan and her four major trading partners

( Saba Naseem ),( Javed Iqbal ),( Misbah Nosheen ),( Mark Wohar ) 한양대학교 경제연구소 2022 JOURNAL OF ECONOMIC RESEARCH Vol.27 No.3

While previous studies have investigated the asymmetric behavior of the J-Curve effect using a Nonlinear ARDL methodology, our study employs disaggregated industry data to investigate this for the relation between Pakistan and US, China, and the UK. Our study contributes to the existing literature by estimating the J-curve phenomena between Pakistan and her four major trading partners; the US, China, the UK, and Japan at the industry level while allowing for asymmetry in the relationship between the exchange rate and the trade balance. The present study estimates both the linear and non-linear ARDL models for selected 22 industries in the USA, 09 industries in China, 27 industries in the UK, and 15 industries in Japan that trade with Pakistan. The empirical exercise shows that the industries having symmetric J-curve effect are 03 in the case of the US and Pakistan, 01 in the case of China and Pakistan, 04 in the case of the UK and Pakistan, and 04 in the case of Japan and Pakistan either considering the traditional definition or the advanced definition of the J-curve effect. According to the asymmetric approach to cointegration, the J-curve effect exists between Pakistan and the USA, China, the UK, and Japan in 11, 02, 09, and 04 industries respectively. The results show that asymmetry holds in the case of many industries. The study indicates the asymmetric behavior of exchange rate changes concerning the trade balance.

Efficient electrochemical performance of MnO2 nanowires interknitted vanadium oxide intercalated nanoporous carbon network as cathode for aqueous zinc ion battery

Rimsha Mehek,Naseem Iqbal,Tayyaba Noor,Yuanshen Wang,Alexey Y. Ganin 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.123 No.-

Rechargeable aqueous Zn-ion batteries (AZIBs) have emerged as promising large-scale energy storagedevices because of their low cost and good safety characteristics. Vanadium oxide-based materials havebeen actively studied as future cathode materials for AZIBs, benefiting from their suitable voltage andhigh specific capacity. However, poor rate performance and capacity deterioration due to the instabilityof their oxides is still a hurdle in their commercialization. Herein, we attempted to test a methodologyinvolving the carbonization of V-MIL-101 to prepare a composite material consisting of vanadium oxidenanoparticles embedded within the nanoporous carbon network, which remarkably enhances the electrochemicalperformance of the material as a cathode in an aqueous Zn-ion battery system. The manganeseoxide loading further stabilized the composite material, which improved the cathode material’srate capability in aq. zinc ion battery cathode. The cathode material MnO2@NVC composite exhibitedthe capacity of 299 mAhg1 at 0.1C rate for 100 cycles benefitting from the synergistic effect of the highconductivity of Vanadium oxide nanoparticles and suitable voltage of MnO2. The materials showed superiorcapacity retention and better cycling performance than unmodified vanadium oxide nanoparticles oncarbon substrate as cathode material. The comparative morphological and electrochemical studies confirmthe improved performance, which suggests that the vanadium oxide nanoparticles anchored on ahigh surface area carbon network intertwined with manganese oxide nanowires provide enhancedconductivity.

Formal Reliability Analyses of Power Line Communication Networkbased Control in Smart Grid

Riaz Uddin,Syed Atif Naseem,Zafar Iqbal 제어·로봇·시스템학회 2019 International Journal of Control, Automation, and Vol.17 No.12

Communication network is one of the primary elements of the Smart Grid for sending and receiving the bi-directional flows of important information such as load flow, faults, etc., in a reliable and efficient way. In this regard, G3-Power Line Communication (PLC) network is the most ideal preference over wireless or wired communication technology due to low cost, high throughput and better reliability for the distribution network of Smart Grid. This fact motivated us to study and analyze in detail the accuracy and reliability of the flow of information of the PLC network in terms of probabilities especially for Fault Detection, Isolation and Supply Restoration (FDIR) behavior in the distribution system of Smart Grid through formal analyses. In order to perform the analyses, first we develop the Markovian model of the FDIR behavior with (G3-PLC) in the distribution network of Smart Grid of the practical intelligent distribution network system case study, and then formally verify the model via probabilistic model checker (PRISM) tool in order to analyze the system accuracy, efficiency, and reliability by developing the logical properties and finding the success/failure probabilities for the FDIR mechanism at the occurrence of faults. Finally, some important discussions are made comparing FDIR connected with Ethernet communication network against FDIR connected with the PLC network.

Synthesis of zinc oxide and silver nanoparticles using ficus palmata - Forssk leaf extracts and assessment of antibacterial activity

Sabaoon Shamshad,Jamshaid Rashid,Ihsan-ul-haq,Naseem Iqbal,Saif Ullah Awan 대한환경공학회 2021 Environmental Engineering Research Vol.26 No.6

Multidrug resistance of bacteria is an emerging human health hazard and warrants development of novel antibacterial agents with more effective mode of action. Here, zinc oxide and silver nanomaterials were prepared using Ficus palmata Forssk leaf extract with efficient antibacterial activity. SEM coupled with EDS confirmed the spherical symmetry with average particle diameter 50 to 65 nm while the XRD confirmed crystalline face centered cubic structure of silver and hexagonal crystallize phase of zinc oxide nanoparticles. Antibacterial activity was evaluated for 8 pathogenic bacterial strains including 3 drug resistant pathogenic strains. The nanoparticles showed enhanced growth inhibition for resistant strains in comparison with the broad-spectrum antibiotics i.e. roxithromycin and cefixime. Minimum inhibitory concentration in μg.mL<SUP>-1</SUP> of silver nanoparticles was found to be as low as 33.3 for resistant Streptococcus haemolyticus; 11.1 for Staphylococcus aureus and E Coli; and 3.7 μg.mL<SUP>-1</SUP> for resistant Pseudomonas aeruginosa. Similarly, the minimum inhibitory concentration of zinc oxide nanoparticles was found to be 100 μg.mL<SUP>-1</SUP> against resistant Streptococcus haemolyticus and Staphylococcus aureus; 11.1 μg.mL<SUP>-1</SUP> for resistant Pseudomonas aeruginosa; and 3.7 μg.mL<SUP>-1</SUP> against resistant E coli. Ficus palmata Forssk leaf extracts can be explored effectively for synthesizing active antibacterial nanomaterials as a non-toxic and environmentally benign synthesis route.

Synthesis of zinc oxide and silver nanoparticles using ficus palmata - Forssk leaf extracts and assessment of antibacterial activity

Sabaoon Shamshad,Jamshaid Rashid,Ihsan-ul-haq,Naseem Iqbal,Saif Ullah Awan 대한환경공학회 2021 Environmental Engineering Research Vol.26 No.6

Multidrug resistance of bacteria is an emerging human health hazard and warrants development of novel antibacterial agents with more effective mode of action. Here, zinc oxide and silver nanomaterials were prepared using Ficus palmata Forssk leaf extract with efficient antibacterial activity. SEM coupled with EDS confirmed the spherical symmetry with average particle diameter 50 to 65 nm while the XRD confirmed crystalline face centered cubic structure of silver and hexagonal crystallize phase of zinc oxide nanoparticles. Antibacterial activity was evaluated for 8 pathogenic bacterial strains including 3 drug resistant pathogenic strains. The nanoparticles showed enhanced growth inhibition for resistant strains in comparison with the broad-spectrum antibiotics i.e. roxithromycin and cefixime. Minimum inhibitory concentration in μg.mL−1 of silver nanoparticles was found to be as low as 33.3 for resistant Streptococcus haemolyticus; 11.1 for Staphylococcus aureus and E Coli; and 3.7 mu;g.mL−1 for resistant Pseudomonas aeruginosa. Similarly, the minimum inhibitory concentration of zinc oxide nanoparticles was found to be 100 mu;g.mL−1 against resistant Streptococcus haemolyticus and Staphylococcus aureus; 11.1 mu;g.mL−1 for resistant Pseudomonas aeruginosa; and 3.7 mu;g.mL−1 against resistant E coli. Ficus palmata Forssk leaf extracts can be explored effectively for synthesizing active antibacterial nanomaterials as a non-toxic and environmentally benign synthesis route.

Fe/Co doped ZIF derived nitrogen doped nanoporous carbon as electrode material for supercapacitors

Ifra Fiaz Gul,Hirra Anwar,Muhammad Arslan Raza,Rabia Ahmad,Naseem Iqbal,Ghulam Ali 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.116 No.-

Nanoporous carbon (NPC) for electrochemical energy storage devices has gained much interest due to itshigh specific area and tunable porosity. Herein, Fe and Co co-doped NPC is synthesized by a simple coprecipitationmethod followed by carbonization of Fe and Co doped ZIF8 at 900 ℃ (Fe-Co/NPC-900). The structural, morphological, elemental, chemical bonding, surface area, and thermal degradation ofthe synthesized material have been evaluated using X-ray diffraction, scanning electron microscopy,energy dispersive spectroscopy, X-ray photoelectron spectroscopy, Brunauer–Emmett–Teller method,and thermogravimetric analysis, respectively. The high surface area of 933 m2/g and nanoporous structureof Fe-Co/NPC-900 electrode results in a high specific capacitance of 900 F/g at a current density of5 A/g. The cycle performance of Fe-Co/NPC-900 was remarkable with 88% of the capacitance retentionafter 5000 cycles at a high current density of 30 A/g. The high electrochemical performance of Fe-Co/NPC-900 is attributed to the hybrid doping of Fe and Co in nitrogen doped carbon network which offersa synergic effect in reaction.