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Protection and Control of Modern Power Systems 2022年第1期7卷 149-164页

作者： md.Yah-Ya Ul haque md.Rashidul Islam Tanvir Ahmed md.Rafiqul Islam Sheikh Department of Electrical and Electronic Engineering Varendra UniversityRajshahi 6204Bangladesh Department of Electrical and Electronic Engineering Rajshahi University of Engineering&TechnologyRajshahi 6204Bangladesh

Growing application of distributed generation units at remote places has led to the evolution of microgrid(MG)*** an MG system functions independently,i.e.,in autonomous mode,unpredictable loads and uncertainties emerge throughout the *** obtain stable and flexible operation of an autonomous MG,a rigid control mechanism is *** this paper,a robust high-performance controller is introduced to improve the performance of voltage tracking of an MG system and to eliminate stability problems.A combination of a resonant controller and a lead-lag compensator in a positive position feedback path is designed,one which obeys the negative imaginary(NI)theorem,for both single-phase and three-phase autonomous MG *** controller has excellent tracking *** is investigated through considering various uncertainties with different load *** feasibility and effectiveness of the controller are also determined with a comparative analysis with some well-known controllers,such as linear quadratic regulator,model predictive and NI approached resonant *** confirms the superi-ority of the designed controller.

关键词： Negative imaginary theorem Resonant controller Lead-lag compensator Autonomous microgrid Voltage tracking

Assessment of Urban Physical Seismic Vulnerability Using the Combination of AHP and TOPSIS Models: A Case Study of Residential Neighborhoods of Mymensingh City, Bangladesh

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Journal of Geoscience and Environment Protection 2018年第2期6卷 165-183页

作者： md. Shaharier Alam Shamim Mahabubul haque Urban and Rural Planning Discipline Khulna University Khulna Bangladesh

Mymensingh, one of the oldest municipalities of Bangladesh, is at great risk against earthquakes because three major faults viz. Dauki fault, Madhupur fault, and Sylhet-Assam fault are located around it, and possesses liquefaction susceptible soil type. The city has great significance from the economic and administrative point of view and recently declared as the 8th administrative division of Bangladesh which directly stimulates the unplanned future expansion. Considering the potentiality of haphazard development and high seismic risk, it is crucial to assess the seismic vulnerability for taking the judicious decision regarding risk reduction measures for the city. The study combines Technique for Order Preference by Similarity to Ideal Solution method (TOPSIS) and Analytical Hierarchical Process (AHP) models to assess the seismic vulnerability of residential neighborhoods of Mymensingh city as the probability of death and damage is remarkable in residential neighborhoods than other land use types. A combined quantitative methodology of AHP-TOPSIS is used in this study to quantify 13 important qualitative and quantitative factors of earthquake vulnerability, decided on expert opinions. The data of 13 vulnerability factors are collected from the Mymensingh Strategic Development Plan (MSDP, 2011-2031) database, done under Comprehensive Disaster Management Programme (CDMP)-II during 2012-2014. Geographic Information System is used in this study to analyze and mapping of seismic vulnerability. Results indicated that 37 residential neighborhoods are very highly vulnerable, 55 neighborhoods are highly vulnerable, 75 neighborhoods are moderately vulnerable and 74 neighborhoods are in the low vulnerable category.

关键词： AHP GIS Physical Seismic Vulnerability TOPSIS

A Comparative Study of Support Vector Machine and Artificial Neural Network for Option Price Prediction

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Journal of Computer and Communications 2021年第5期9卷 78-91页

作者： Biplab Madhu md. Azizur Rahman Arnab Mukherjee md. zahidul Islam Raju Roy Lasker Ershad Ali Mathematics Discipline Science Engineering and Technology School Khulna University Khulna Bangladesh

Option pricing has become one of the quite important parts of the financial market. As the market is always dynamic, it is really difficult to predict the option price accurately. For this reason, various machine learning techniques have been designed and developed to deal with the problem of predicting the future trend of option price. In this paper, we compare the effectiveness of Support Vector Machine (SVM) and Artificial Neural Network (ANN) models for the prediction of option price. Both models are tested with a benchmark publicly available dataset namely SPY option price-2015 in both testing and training phases. The converted data through Principal Component Analysis (PCA) is used in both models to achieve better prediction accuracy. On the other hand, the entire dataset is partitioned into two groups of training (70%) and test sets (30%) to avoid overfitting problem. The outcomes of the SVM model are compared with those of the ANN model based on the root mean square errors (RMSE). It is demonstrated by the experimental results that the ANN model performs better than the SVM model, and the predicted option prices are in good agreement with the corresponding actual option prices.

关键词： Machine Learning Support Vector Machine Artificial Neural Network Prediction Option Price

Molecular Diversity Analysis of Some Chilli (<i>Capsicum</i>spp.) Genotypes Using SSR Markers

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American Journal of Plant Sciences 2018年第3期9卷 368-379页

作者： Afsana Sharmin md. Ekramul Hoque md. Masudul haque Fahima Khatun Department of Biotechnology Sher-e-Bangla Agricultural University Dhaka Bangladesh Regional Spices Research Centre Bangladesh Agricultural Research Institute (BARI) Dhaka Bangladesh

Chilli belongs to the genus Capsicum which possesses enormous wealth of genetic diversity. Extent of genetic diversity determines the success level of crop improvement programme. Simple sequence repeats (SSRs) are the most widely used marker system for molecular diversity analysis especially in cultivated species. The aim of our present study was to assess the molecular genetic diversity of 20 local chilli genotypes of Bangladesh using SSR markers. Genomic DNA was extracted from young leaves and PCR reactions were performed. Eleven SSR primers were used in PCR amplification. Total 10 alleles were detected for the five polymorphic SSR loci, with a mean of 2.00 alleles per primer. Gene diversity ranged from 0.333 to 1.00 with an average of 0.567. Polymorphic Information Content (PIC) values of the SSR primers ranged from 0.255 to 0.500 with an average value of 0.371. The similarity index matrix ranged from 0.00 to 1.000. It was highest in several germplasms viz. Pop-2 vs Pop-18;Pop-3 vs Pop-5 vs Pop-19 vs Pop-20 and the lowest in the germplasm Pop-8 vs Pop-18. Dendrogram based on Nei’s genetic distance using Unweighted Pair Group Method of Arithmetic Means (UPGMA) indicated the segregation of 20 chilli genotypes into two main clusters. The SSR markers showed genetic variability in the studied pepper genotypes and they are powerful tools for estimating molecular diversity of chilli. The findings of the present study have potential applications in future breeding programme for the genetic improvement of chilli.

关键词： Capsicum Molecular Diversity Genotypes SSR Markers Polymorphism

Modeling of Mixed Convection in a Lid Driven Wavy Enclosure with Two Square Blocks Placed at Different Positions

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Journal of Applied Mathematics and Physics 2023年第12期11卷 3984-3999页

作者： Sree Pradip Kumer Sarker md. Mahmud Alam md. Jahirul haque Munshi Department of Mathematics Dhaka University of Engineering and Technology (DUET) Gazipur Bangladesh Department of Mathematics Hamdard University Bangladesh Munshigonj Bangladesh

The purpose of this paper is to investigate the simulation of mixed convection in a lid-driven wavy enclosure with blocks positioned at various positions. This study also examined the impact of the longitudinal position of the heated block on heat transfer enhancement. The Galerkin weighted residual finite element method is employed to computationally solve the governing equations of Navier-Stokes, thermal energy, and mass conservation. The enclosure consists of two square heated blocks strategically placed at different heights—firstly, one set is closer to the bottom surface;secondly, one set is nearer to the middle area and finally, one set is closer to the upper undulating surface of the enclosure. The wavy top wall’s thermal insulation, along with active heating of the bottom wall and blocks, generates a dynamic convective atmosphere. In addition, the left wall ascends as the right wall falls, causing the flow formed by the lid. The study investigates the impact of the Richardson number on many factors, such as streamlines, isotherms, dimensionless temperature, velocity profiles, and average Nusselt numbers. These impacts are depicted through graphical illustrations. In all instances, two counter-rotating eddies were generated within the cage. Higher rotating speed consistently leads to improved performance, irrespective of other characteristics. Furthermore, an ideal amalgamation of the regulating factors would lead to increased heat transmission.

关键词： Mixed Convection Lid-Driven Wavy Top Surface and Square Heated Blocks

Minimization of Air Consumption and Potential Savings of Textile Denim Fabric Manufacturing Process

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Journal of Textile Science and Technology 2023年第1期9卷 69-83页

作者： md. Enamul haque md. Bokthier Rahman Waliul Kafi md. Suja Uddin Kaiser Abhijit Dey Khulna University of Engineering & Technology (KUET) Khulna Bangladesh Bangladesh University of Textiles (BUTEX) Dhaka Bangladesh

One of the most important aspects of Bangladesh’s textile industry is denim. Bangladesh now has a new opportunity thanks to the global demand for denim among fashion industry professionals. Entrepreneurs from Bangladesh provide denim products to well-known international merchants all over the world. The worldwide denim market is predicted to expand by roughly 8% through the year 2020. We must raise the standard of denim if we are to keep up with the expanding industry. In contrast to projectile and rapier systems, air-jet weaving machines nowadays can weave practically all types of yarns without any issues and at higher rates. Due to this, air-jet looms are an excellent substitute for other weft insertion techniques. This kind of device still has one significant flaw, though, and that is the enormous power consumption brought on by the creation of compressed air. Researchers and manufacturers of air-jet looms have therefore worked very hard to find a solution to this issue and achieve a huge reduction in air consumption without compromising loom performance or fabric quality. Therefore, the purpose of this project is to look into ways to decrease air consumption and reduce auxiliary selvedge waste without any decrease in loom performance and fabric quality on existing air-jet weaving looms which reduce the manufacturing costs with process improvement. Just updating the air pressure allowed a weaving mill to reduce air usage by 11 cfm. So, with just almost no cost, a company with 100 looms could save $0.15 M each year, on compressed air. Two new methods for decreasing process costs on air jet looms have also been developed by this project work.

关键词： Denim Woven Textiles Weaving Machine Air Consumption Cost Reduction Waste Reduction Potential Savings

Wildfire in Australia during 2019-2020, Its Impact on Health, Biodiversity and Environment with Some Proposals for Risk Management: A Review

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Journal of Environmental Protection 2021年第6期12卷 391-414页

作者： md. Kamrul haque md. Abul Kalam Azad md. Yeamin Hossain Tareq Ahmed Minhaz Uddin md. Mukhtar Hossain Department of Crop Science and Technology University of Rajshahi Rajshahi Bangladesh Department of Fisheries Faculty of Agriculture University of Rajshahi Rajshahi Bangladesh Department of Plant Pathology and Seed Science Sylhet Agricultural University Sylhet Bangladesh School of Environmental Science and Engineering Tianjin University Tianjin China

Wildfire is closely associated with human society and having its effect on earth as well as on its environment for more than 350 million years. It is a very common phenomenon from the ancient period, has hazardous effects on both environment and human life. This study mainly focuses on the review of wildfire of Australia during 2019-2020 regarding its distribution, status of fatality influences on different environmental factors, consequences and some proposals for its mitigation. In this review paper, a modified edition of the principled review methodology was followed in compiling the most reliable data to support the bushfire in Australia belonging to its causes of occurrences and impacts. The bushfire was started in mid-June in 2019, and it is still now burning in hundreds of places of different parts of Australia, and the forest of New South Wales, Northern Territory, Western Australia, Queensland and Victoria were being burnt deadly. The accumulating data exposed the year 2019 as the driest and warmest year with lowest rainfall that might be the potential causes of bushfires in Australia. Moreover, maximum forest land of Australia is covered by naturally grown Eucalyptus trees which are generally flammable and supply oil type fuel during bushfires. Bushfire deteriorates the quality of soil, water and air of the locality up to many hundreds or thousands of kilometers away in increasing the emission of toxic substances and carbon rate. Around more than 3 billion native vertebrates, 143 million mammals, 2.46 billion reptiles, 181 million birds, 51 million frogs were burnt out by bushfires of 2020 in Australia. More than US$110 billion financial loss has been determined due to this fire of Australia. In some cases, it is also helpful for forest land. Sometimes it helps to continue the forest ecosystem by burning unwanted plants, animals and microscopic compounds. To reduce the hazard needs proper land regulation, combination of social governance, sufficient fundin

关键词： Temperature Rainfall Human Health Biodiversity Environmental Effects

Biochemical and histopathological profiling of Wistar rat treated with Brassica napus as a supplementary feed

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Food Science and Human Wellness 2018年第1期7卷 77-82页

作者： Kazi md.Mahmudul Hasan Nasrin Tamanna md.nwarul haque Department of Biotechnology and Genetic Engineering Faculty of Applied Science and TechnologyIslamic UniversityKushtia7003Bangladesh Department of Health Technology and Informatics The Hong Kong Polytechnic UniversityHong Kong

Metabolic changes together with cardiovascular and hepatic factors are related to the development of diseases like myocardial lipidosis,heart disease,and profound *** aim of this animal study is to determine the effects of high erucic acid containing rapeseed oil(Brassica napus L.)varieties on liver,kidney and heart muscles in Wistar *** Wistar rats were divided into three groups where each group containing four *** A was considered as control diet group,while Group B rapeseed wild oil group and Group C rapeseed hybrid oil group were considered as experimental diet *** levels of aspartate aminotransferase(AST),alanine aminotransferase(ALT),alkaline phosphatase(ALP),creatine kinase-MB(CK-MB)and creatinine of two experimental groups were significantly elevated while compared to the control groups(p0.05).Noticeable tissue injury observed in this study is a sign of the relative toxicity of erucic acid containing rapeseed oil to mammalian *** use of Brassica napus as a supplementary feed ingredient should be,therefore,thoroughly considered.

关键词： Rapeseed oil Rattus norvegicus Serum enzymes Erucic acid Tissue profiling

Improving Grain Yield of Indigenous Rice in Tidal Floodplain of Southern Bangladesh: Effect of Seedling Age and Transplanting Method

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Agricultural Sciences 2015年第12期6卷 1538-1546页

作者： Abdul Hamid md. Jafar Ullah md. Moynul haque md. Faruque H. Mollah md. Moksedur Rahman Agrarian Research Foundation Shekhertek Mohammadpur Dhaka Bangladesh Agronomy Department Sher-e-Bangla Agricultural University Dhaka Bangladesh Agronomy Department Bangabandhu Sheikh Mujibur Rahman Agricultural University Gazipur Bangladesh Coastal Ecosystem Unit Agrarian Research Foundation Barisal Bangladesh

Rice production in the tidal floodplain of southern Bangladesh is constrained by uncontrolled water. In absence of high yielding varieties suitable for tidal floodplain, farmers grow low yielding indigenous cultivars of tall plant type. This paper reports the effect of agronomic management on the yield and yield components of an indigenous rice cultivar, Sadamota. The trial was conducted in 10 farmers’ plots located widely apart in two upazila (sub-districts)—Jhalakati and Rajapur. 45 d and 60 d old seedlings were transplanted either in rows at 40 cm × 20 cm spacing or following farmers’ traditional practice of random planting. Transplanting 60 d old seedlings produced 14% higher yield compared with 45 d old seedlings. Transplanting in rows also increased grain yield by 12%. The yield increase was associated with hill density, the number of effective tillers per hill and the number of spikelets per panicle.

关键词： Rice Seedling Age Planting Method Tidal Floodplain Tillers Seedling Dry Weight Grain Yield

Hydrobiological variables as a regulatory factor on the abundance of heterotrophic flagellates in an urban pond

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Journal of Oceanology and Limnology 2019年第3期37卷 1030-1036页

作者： BEGUM Moni JEWEL md.Abu Sayed haque md.Ayenuddin KHATUN Mst.Samsad Department of Fisheries Faculty of Agriculture University of Rajshahi

The seasonal abundance of flagellates has been monitored over a period of 1 year from December 2013 to November 2014(divided into 4 conjugative seasons namely winter,spring,summer,and autumn)in an experimental pond located in Rajshahi City Corporation area,*** our knowledge,this study is the fi rst to shed light on the occurrence and possible interrelationships among heterotrophic flagellates(HF),bacteria and zooplankton in Bangladesh and the result obtained by this study will be beneficial for similar water ecosystem all over the *** methods were used to determine the prescribed hydrological parameters and zooplankton cell *** HF abundance(14 346.00 cells/mL)was found in the spring and the minimum(5 215.00 cells/mL)occurred in the *** to HF,significantly(Pmd.)have shown significant seasonal differences for cell numbers where md. ordination plot and cluster analysis based on similarity in the genera abundance of HF revealed overlapping condition between winter and *** correspondence analysis(CCA)also showed a distinct separation among the genera based on the prevailing hydrological situation and indicated that temperature,pH,BOD5,and NO3^-were the most important environmental variables in determining the observed variation in HF community *** the biological factors,zooplankton showed negative but total bacteria were positively correlated with HF abundance.

关键词： heterotrophic flagellates abundance hydrobiological factors urban pond