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Modeling,Parameter Measurement,and Control of PMSG-based Grid-connected Wind Energy Conversion System

Journal of Modern Power Systems and Clean Energy 2021年第5期9卷 1054-1065页

作者： Mohammad Kamruzzaman Khan Prince Graduate Mohammad TArif Ameen Gargoom Aman MTOo md Enamul haque Renewable Energy&Electric Vehicle(REEV)Lab Centre for Smart Power&Energy Research(cSPER)School of EngineeringDeakin UniversityWaurn pondsAustralia

The design of reliable controllers for wind energy conversion systems(WECSs)requires a dynamic model and accurate parameters of the wind *** this paper,a dynamic model and the parameter measurement and control of a direct-drive variable-speed WECS with a permanent magnet synchronous generator(PMSG)are *** experimental method is developed for measuring the key parameters of the *** measured parameters are used in the design of the *** generator-side converter is controlled using a vector control scheme that maximizes the power extraction under varying wind speeds.A model predictive controller(MPC)is designed for the grid-side voltage source converter(VSC)to regulate the active and reactive power flows to the power grid by controlling the d-and q-axis currents in the synchronous reference *** MPC predicts the future values of the control variables and takes control actions based on the minimum value of the cost *** comply with the grid code requirement,a modified design approach for an LCL filter is presented and incorporated into the *** design process is simple and incorporates significant filter parameters while avoiding iterative *** comparative analysis of the designed filter with conventional L,LC,and iterative LCL filters demonstrates the effectiveness of the modified design *** proposed wind energy system with MPC and LCL filter is simulated in MATLAB/Simulink and experimentally implemented in the laboratory using the dSpace digital signal processor(DSP)*** simulation and experimental results validate the efficacy of the designed controllers using the measured parameters and show dynamic and steady-state performance under varying wind speeds.

关键词： Wind energy permanent magnet synchronous generator(PMSG) parameter measurement model predictive controller(MPC) LCL filter

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Haplotype Diversity at Sub1 Locus and Allelic Distribution Among Rice Varieties of Tide and Flood Prone Areas of South-East Asia

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Rice science 2017年第4期24卷 198-206页

作者： A.S.M.MASUDUZZAMAN md.Maksudul haque A.K.M.SHAMSUDDIN M.A.SALAM md.Ansar ALI Plant Breeding Division Bangladesh Rice Research InstituteGazipur 1701Bangladesh Scientific Officer(Golden Rice) Plant Breeding DivisionBangladesh Rice research InstituteGazipur 1701Bangladesh Department of Genetics and Plant Breeding Bangladesh Agricultural UniversityMymensingh 2202Bangladesh Director Research Bangladesh Rice Research InstituteGazipur 1701Bangladesh

Single nucleotide polymorphisms and restriction digestion-based haplotype variations among 160 flood prone rice varieties were analyzed with enzymes Alu I and Cac8 I to generate polymorphisms at Sub1A and Sub1C loci （conferring submergence tolerance）, respectively. Haplotype associated with phenotype was used to study the haplotype variations at Sub1A and Sub1C loci and to determine their functional influence on submergence tolerance and stem elongation. Three patterns at Sub1A locus, Sub1A0 （null allele）, Sub1A1 （does not cut） and Sub1A2 （one SNP）, and four patterns at Sub1C locus, Sub1C1, Sub1C2, Sub1C3 and Sub1C4, were generated. Both tolerant Sub1A1 and intolerant Sub1A2 had the same length, but the difference was presence of a restriction site in the Sub1A2, but absent at the Sub1A1. Further, two types of polymorphism were detected at the Sub1C, one included major length polymorphisms （165, 170 and 175 bp） and the other was a single restriction site at different position. Eight haplotypes （different combinations of the two loci）, A1C1, A1C2, A1C4, A2C2, A2C4, A0C2, A0C3 and A0C4, were detected among 160 varieties. Haplotype A1C1 was comparatively more related to haplotypes A1C2 and A1C4, having the same Sub1A allele, and these haplotypes were found only in Bangladeshi, Sri Lankan and Indian varieties. Most tolerant varieties in A1C1 haplotype showed slow elongation, having tolerant specific Sub1A1 and Sub1C1 alleles. Further, the varieties Madabaru and Kottamali （A2C2） also showed moderate level of tolerance without Sub1A1 allele. These varieties were different with FR13A and also suspected to carry different novel tolerant genes at other loci. These materials could be used for hybridization with Sub1 varieties for pyramiding additional tolerant specific alleles into a single genotype for improving submergence tolerance in rice.

关键词： haplotype Sub1 allele single nucleotide polymorphism submergence

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Insight into 5-aminolevulinic acid-induced modulation of cellular antioxidant metabolism to confer salinity and drought tolerance in maize

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BIOCELL 2020年第4期44卷 713-730页

作者： md.ROBYUL ISLAM TAHIA NAZNIN DIPALI RANI GUPTA md.ASHRAFUL haque MIRZA HASANUZZAMAN md.MOTIAR ROHMAN Institute of Biotechnology and Genetic Engineering(IBGE) Bangabandhu Sheikh Mujibur Rahman Agricultural UniversityGazipur1706Bangladesh Department of Genetics and Plant Breeding Bangabandhu Sheikh Mujibur Rahman Agricultural UniversityGazipur1706Bangladesh Department of Agronomy Faculty of AgricultureSher-e-Bangla Agricultural UniversitySher-e-Bangla NagarDhaka1207Bangladesh Molecular Breeding Laboratory Plant Breeding DivisionBangladesh Agricultural Research InstituteGazipur1701Bangladesh

The current study investigated the comparative oxidative damage in twomaize seedlings induced by saline,drought,and combined stress and the ameliorative role of two different doses(20 and 80μM)of 5-aminolevulinic acid(ALA)against the above-mentioned *** grown 10-day-old maize(Zea mays,*** Hybrid Maize-7(BHM-7)and BARI Hybrid Maize-9(BHM-9))seedlings were exposed to 12 dS/m of saline solution,200 mM mannitol-induced drought stress alone and their combined stress for 7 *** revealed that individual stresses retard the plant growth to some degrees,however,their combined stress has more detrimental effects,which might be correlated with lipid peroxidation(mdA)-induced oxidative stress in seedlings,enhanced Na+/K+ratio,and augmented generation of superoxide(O_(2)•^(−))and hydrogen peroxide(H_(2)O_(2)).In contrast,exogenous ALA supplementation at 20μM concentration markedly recovered from chlorosis and growth inhibition,substantially scavenged reactive oxygen species(ROS)and mdA by preserving ionhomeostasis and relaxing oxidative stress,also,by boosting catalase(CAT)and glutathione S-transferase(GST),and exclusively via depressing the activity of lipoxygenase(LOX)antioxidant *** the contrary,80μM ALA made things worse,nevertheless,higher activities shown by other antioxidant enzymes,like,superoxide dismutase(SOD),ascorbate peroxidase(APX),peroxidase(POD),and glutathione peroxidase(GPX),which were related to lessen the oxidative damage by highly produced O_(2)•^(−)and H_(2)O_(2) under combined ***-denaturing gel electrophoresis was done for further ***,ALA importantly increased the photosynthetic pigment contents in both genotypes irrespective of ***,GST might have assisted the plants to escape from the herbicidal effect by ***,in the combined stress condition,high ALA concentration may have some positive role to *** findings also showed that BHM-9 performed better than BHM

关键词： Maize Combined stress Salinity Drought 5-aminolevulinic acid Oxidative stress

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Enhancement of Growth and Grain Yield of Rice in Nutrient Deficient Soils by Rice Probiotic Bacteria

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Rice science 2017年第5期24卷 264-273页

作者： md Mohibul Alam KHAN Effi haque Narayan Chandra PAUL md Abdul KHALEQUE Saleh M. S. AL-GARNI Mahfuzur RAHMAN md Tofazzal ISLAM Department of Biotechnology Bangabandhu Sheikh Mujibur Rahman Agricultural University Gazipur 1706 Bangladesh Department of Biochemistry & Microbiology North South University Dhaka 1229 Bangladesh Department of Rural Development Administration Bioenergy Crop Research Institute Muan 534833 Republic of Korea Department of Biological Sciences King Abdulaziz University Jeddah 2589 Kingdom of Saudi Arabia West Virginia University Morgantown West Virginia 26505 USA

Plant associated bacteria are promising alternatives to chemical fertilizers for plant growth and yield improvement in an eco-friendly *** this study,rice associated bacteria were isolated and assessed for mineral phosphate solubilization and indole-3-acetic acid(IAA) production activity in *** promising strains,which were tentatively identified as phylotaxon Pseudochrobactrum sp.(BRRh-1),Burkholderia sp.(BRRh-2),Burkholderia sp.(BRRh-3),Burkholderia sp.(BRRh-4),Pseudomonas aeruginosa(BRRh-5 and BRRh-6) based on their 16 S rRNA gene phylogeny,exhibited significant phosphate solubilizing activity in National Botanical Research Institute phosphate growth medium,and BRRh-4 displayed the highest phosphate solubilizing activity,followed by *** p H of the culture broth declined,resulting in increase of growth rate of bacteria at p H 7,which might be due to organic acid secretion by the *** presence of L-tryptophan,five isolates synthesized IAA and the maximum IAA was produced by BRRh-2,followed by *** of two most efficient phosphate solubilizing isolates BRRh-4 and BRRh-5 by root dipping(colonization) of seedling and spraying at the flowering stage significantly enhanced the growth and grain yield of rice variety BRRI ***,application of both strains with 50% of recommended nitrogen,phosphorus and potassium fertilizers produced equivalent or higher grain yield of rice compared to the control grown with full recommended fertilizer doses,which suggests that these strains may have the potential to be used as bioinoculants for sustainable rice production.

关键词： indole-3-acetic acid mineral phosphate solubilization rice plant growth promotion plant associated bacterium grain yield fertilizer

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Optimization of Finishing Process and Energy Savings in Denim Textile Facility

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Journal of Textile Science and Technology 2023年第3期9卷 151-164页

作者： md. Enamul haque Kaisul Kabir md. Asib Khan Mohammad Abu Syed Nizami Rajib Kabiraj Mohammed Fakhruddin md. Golam Arif md. Abu Hanif Khulna University of Engineering & Technology Khulna Bangladesh Textile Engineering College Chittagong Bangladesh Bangladesh University of Textiles Dhaka Bangladesh Dhaka University of Engineering & Technology Gazipur Bangladesh Bangabandhu Textile Engineering College Tangail Bangladesh

Denim is widely accepted among exported textile products due to its aesthetics, appearance, and fashion. Practitioners employed several physical or chemical treatments to improve denim qualities in denim finishing operations. So, several treatment processes, including enzymatic, bleaching, singeing, heat set, and ozone finish, are used, which made this processing more energy consumption and time-consuming. Therefore, it is significant to investigate how changing the chemicals and raw ingredients could improve the finishing process, which is environmentally and economically beneficial for sustainable production practices in the denim finishing process. This study’s research design comprises an experimental investigation in a denim plant in Bangladesh. Two different fabrics were chosen to analyze, determining the potential savings of finishing on the denim fabrics’ performance characteristics. By deducting singeing and heat-set processes, the researchers ran an experimental process by maintaining the same length of fabric. Then, the impacts of finishing process optimization on the mechanical, thermal, and comfort parameters of drape, stiffness, and tear strength were examined. The study’s findings demonstrated that this experiment increased productivity and reduced the finishing unit’s energy consumption without compromising the denim fabrics’ quality. This study significantly impacts environmental sustainability by preserving limited energy resources and manufacturing denim finishing processes.

关键词： Finishing Process Energy Savings Denim Fabrics Potential Savings Process Optimization Cotton-Elastane Fabric

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Effects of O₃ Treatment on Different Composition % (Cotton, Polyester, Elastane) of Denim Fabrication (GSM 295, 327, 340, 343, 357, 360, 413) after Random O₃ Wash

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Journal of Textile Science and Technology 2023年第4期9卷 215-226页

作者： Engr. md. Eanamul haque Nizam Mazharul Islam md. Tariqur Rahman Bhuya Tanvir Monir Hossain Bahar Mia Ashraful Islam Department of Textile Engineering Southeast University Dhaka Bangladesh

In the present day, all the buyers are encouraging the sustainable wash in the industry to conform to their orders. The washing industry is facing some difficulties after receiving the order from the buyers. That’s why, in this study, the authors have selected different percentages of cotton, polyester, and elastane fabric containing the GSM 295, 327, 340, 343, 357, 360, and 413 to conduct these experiments to reduce the difficulties of the washing industry. For all different types of denim fabrics, the physical properties test (tensile, tear, and GSM) and the chemical properties test (color fastness to crocking, color fastness to ozone, pH) have been done here to collect the row data. The main aim of this study was to find out about shade variation, weight loss, physical property changes, etc. before and after the third wash. This study will help the washing industry choose fabric types for sustainable washing in the future.

关键词： Ozone GSM Shade Fabric

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Effects of <i>Syzygium cumini</i>Seed Extract on the Memory Loss of Alzheimer’s Disease Model Rats

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Advances in Alzheimer's Disease 2017年第3期6卷 53-73页

作者： Shahdat Hossain Jahirul Islam Sujan Bhowmick mozammel haque Asiqur Rahaman Laboratory of Alternative Medicine & Behavioral Neurosciences Department of Biochemistry and Molecular Biology Jahangirnagar University Savar Dhaka Bangladesh

Alzheimer’s disease (AD) is the most prominent dementia-related disease and characterized by the presence of insoluble amyloid beta peptide (Aβ) fibers in or around the brain neurons of the affected person. Therefore, agent(s) capable of inhibiting brain amyloid deposition might delay the occurrence or retard the progress forwards of AD and related neurobehavioral symptoms. Here, we report whether, chronic oral administration of Syzygium cumini (locally known as Jam)-seed extract exerts protection against the progressive cognitive decline in the Aβ1-40-infused AD model rats. After 12 weeks of feeding with S. cumini seed extract (at 300 mg/kg BW), we evaluated the learning-related memory of the rats by 8-arm radial maze task, where we determined two types of memory errors, namely reference memory errors (RMEs) and working memory errors (WMEs). After completion of memory tests, rats were sacrificed and the levels of lipid peroxide (LPO), the Aβ1-40-burden, Aβ1-40-oligomers, proinflammatory TNFα, brain derived neurotrophic factor (BDNF), Tyrosine-kinase B (TrkB), postsynaptic-density protein 95 (PSD-95) and Synapse-associated protein (SNAP-25) were determined in the corticohippocampal tissues of the brain. In addition, in vitro antioxidative effects of S. cumini seed extract were evaluated. The oral administration of S. cumini extract significantly increased the memory-related learning ability of the AD model rats, concomitantly with reductions in the levels of corticohippocampal Aβ1-40-burden and Aβ1-40-oligomers. Furthermore, the extract suppressed the levels of TNFα and LPO in the corticohippocampal tissues of the AD rats and also the later in the plasma, suggesting an anti-oxidative and anti-inflammatory activities of the S. cumini extract in the brains of AD model rats. S. cumini extract also increased the levels of brain cognition and memory-related proteins, including BDNF, TrKB, PSD-95 and SNAP-25. We thus suggest that S. cumini-seed extract could be used in ne

关键词： Alzheimer’s Disease S. cumini Memory Amyloid Peptide Lipid Peroxide BDNF TrKB PSD-95 and SNAP-25

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A Critical Analysis of Machine Learning and Deep Learning Methods for Cervical Cancer Screening

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Journal of Computer and Communications 2023年第12期11卷 64-85页

作者： Muhtasim Mahmudur Rahman Jakir Khan Abu Sale Mohammad Mostafizur Rahman Redoanul haque md. Sumon Ali Department of Computer Science and Engineering Bangladesh Army University of Engineering & Technology Natore Bangladesh

Cervical cancer is a serious public health issue worldwide, and early identification is crucial for better patient outcomes. Recent study has investigated how ML and DL approaches may be used to increase the accuracy of vagina tests. In this piece, we conducted a thorough review of 50 research studies that applied these techniques. Our investigation compared the outcomes to well-known screening techniques and concentrated on the datasets used and performance measurements reported. According to the research, convolutional neural networks and other deep learning approaches have potential for lowering false positives and boosting screening precision. Although several research used small sample sizes or constrained datasets, this raises questions about how applicable the findings are. This paper discusses the advantages and disadvantages of the articles that were chosen, as well as prospective topics for future research, to further the application of ml and dl in cervical cancer screening. The development of cervical cancer screening technologies that are more precise, accessible, and can lead to better public health outcomes is significantly affected by these findings.

关键词： Cervical Cancer Neoplasms Screening Machine Learning Techniques Deep Learning Techniques

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VISCAL： Heuristic algorithm based application tool to calibrate microscopic simulation parameters

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Journal of Traffic and Transportation Engineering(English Edition) 2018年第1期5卷 28-43页

作者： Mohammad Rayeedul Kalam Siam Shamima Nasrin md Hadiuzzaman Shah md Muniruzzaman Nazmul haque Department of Civil Engineering Bangladesh University of Engineering and Technology (BUET) Dhaka 1000 Bangladesh Department of Civil Engineering Presidency University Dhaka 1213 Bangladesh Department of Civil Engineering Military Institute of Science and Technology (MIST) Dhaka 1216 Bangladesh

VISCAL （VISSIM calibration） is an automated calibration tool for microscopic simulation parameters in VISSIM environment, based on three heuristic optimization algorithms：（a） genetic algorithm （GA）; Col simultaneous perturbation stochastic approximation （SPSA）; （c） simulated annealing （SA）. It is developed with a goal to automate and ease the tedious process of calibration, offering greater flexibility to the users by providing control on every aspect of the calibration process. It includes multiple features for a generic application tool with the ability to test the significance of the appropriate decision parameter set for a particular network, to determine the most suitable objective function to reflect network characteristics, and to check the suitability of any of the three heuristic optimization al- gorithms for a particular network. VISCAL also offers four objective function choices into the system：（1） speed, （2） flow, （3） delay, and （4） multi-objective criteria. It is able to calibrate all the driving behavior parameters for any type （urban, rural） and extent of network （small or large network）. However, for this study, the operation of the tool is tested by a dataset obtained from a 3.26 km freeway of Dhaka, Bangladesh.

关键词： VISSIM Genetic algorithm Simulated annealing Simultaneous perturbation stochastic approximation

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Serum Vitamin D and Bone Mineral Density in Children with Growing Pain in a Tertiary Hospital of Bangladesh

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Open Journal of Pediatrics 2022年第5期12卷 815-826页

作者： md. Asif Ali Mujammel haque Mohammad Imnul Islam Mohammad Zahirul Islam Khan Shahana Akhter Rahman Department of Paediatrics Bangabandhu Sheikh Mujib Medical University Dhaka Bangladesh

Background:Growing pain (GP) is the most common form of nonspecific, recurrent leg pain in children aged 4 - 12 years. The exact etiology of GP is not known. However, some studies have found an association between vitamin D and Bone Mineral Status (Bmd) status with GP in their study. Objectives: To assess the serum level of vitamin D, and Bmd and to determine their association with growing pain in children. Methods: This cross-sectional analytical study was conducted in the Department of Paediatrics, Bangabandhu Sheikh Mujib Medical University (BSMMU). Sixty children between the age of 6 - 12 years were included in the study from March 2020 to August 2021. Children who fulfilled the Evans criteria of GP were enrolled as cases and thirty age and sex matched healthy children were recruited as the control in the study. Informed written consent was obtained from patients and parents. Serum 25-hydroxy-vitamin-D levels and Bmd were performed among cases and controls and subsequently compared to see their association in growing pain. A preformed semi-structured questionnaire was completed for each participant which included socio-demographic, clinical and laboratory characteristics. Appropriate statistical tests were applied for data analysis and performed by SPSS version 22. A p-value less than 0.05 was considered as significant at a 95% confidence interval. Results: In this study, 96.7% of growing pain patients had hypovitaminosis D and among them, the majority (86.7%) was vitamin D deficient. There was a significant association between vitamin D with GP compared to healthy control. Bmd was significantly lower in the lumbar vertebra (L1 - L4) and femoral neck region (both right and left) among GP children compared to the control group. Conclusion: From this study, it may be concluded that the majority of children with GP had hypovitaminosis D and low Bmd status compared to the control. Vitamin D deficiency and low B

关键词： Growing Pain Vitamin D Bone Mineral Density

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