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Single polarization photonic crystal fiber filter based on surface plasmon resonance

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Frontiers of Optoelectronics 2019年第2期12卷 157-164页

作者： md. nazmul HOSSEN md. FERDOUS Kawsar AHMED md. Abdul KHALEK Sujan CHAKMA Bikash Kumar PAUL Department of Information and Communication Technology(ICT) Mawlana Bhashani Science and Technology University(MBSTU)SantoshTangail 1902Bangladesh Group of Biophotomatix SantoshTangail 1902Bagladesh Department of Software Enineering(SWE) Daffodil International UniversityShukrabadDhaka 1207Bangladesh

In this paper,we propose a photonic crystal fiber(PCF)polarization filter based on surface plasmon resonance(SPR)*** nanowire is used as the active plasmonic *** into silica core becomes coupled to gold nanowire stimulating SPR. It soplits light into two orthogonal(x-polarization and y-polarization)polarization in the second order of surface plasmon *** investigations of the proposed PCF filter is finite element method(FEM).By position,the performance of the propsed PCF filter is inspected *** of any polarization can be obtained by properly placing the metal *** maximum cnfinement loss of x-polarization is 692.25dB/cm and y-polarization is 1.13dB/cm offers at resonance position 1.42μ*** a confinement loss difference between two orthogonal polarizations makes PCF a talented candidate to filter ***,the recommended PCF structure is useful for polarization device.

关键词： photonic crystal fiber (PCF) surface plasmon resonance (SPR) perfectly match layer polarization filter

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

A Heuristic on Risk Management System in Goods Transportation Model Using Multi-Optimality by MODI Method

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Open Journal of Applied Sciences 2016年第8期6卷 539-551页

作者： md. Ashraful Babu Jahira Tabassum md. nazmul Hassan Department of Mathematics BCS-General Education Dhaka Bangladesh Department of Mathematics International University of Business Agriculture and Technology (IUBAT University) Dhaka Bangladesh Department of Civil & Environmental Engineering Uttara University Dhaka Bangladesh

Transport risk management is one of the predominant issues to any industry for supplying their goods safely and in time to their beneficiaries. Damaging goods or delaying the shipping both make penalty to the company and also reduce the goodwill of the company. Every way of transportation routes has to be comfy which can make sure the supplies will attain without damaging goods and in time and additionally cost efficiently. In this paper, we find a few not unusual risks which might be concerned about all types of way of routes which include Highway, Waterway, Airway, Railway and so forth. Additionally, we proposed a technique to attain multiple optimal solutions by using Modified Distribution Method (MODI) of a transportation problem. Finally, we reduce the risks by minimizing the possible number of transportation routes using multi-optimality technique of the transportation problem.

关键词： Transportation Problem Multi-Optimality Modified Distribution Method (MODI) Risk Factors Transport Risk Management

Measuring the Association of Overweight and Obesity with Human Disease and Other Factors in Bangladesh

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Open Journal of Statistics 2020年第3期10卷 402-411页

作者： md. Roshidul Islam md. Anamul haque Department of Statistics Begum Rokeya University Rangpur Bangladesh

Overweight and obesity in people are epidemic in North America and internationally. In the United States, the number of overweight children and adolescents has doubled in the last two to three decades, and similar increasing rates are being observed worldwide, including developing countries as Bangladesh where an increase in Westernization of behavioral and dietary lifestyles is evident. Human diseases associated with overweight and obesity are similar in children as in the adult population. The main purpose of this study was to examine the association between overweight and obesity with human disease and other factors in Bangladesh. We have attempted to estimate the relationship between associated variables by using the Pearson Chi-Square test. It also showed how important an individual variable is by itself. The study also employed a statistical technique namely, logistic regression analysis which has been used to find out the association of overweight and obesity with human disease and other factors. We have seen that 16.96% people are overweight

Performance Improvement of CIGS Solar Cell: A Simulation Approach by SCAPS-1D

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Energy and Power Engineering 2023年第8期15卷 291-306页

作者： md. Ferdous Wahid md. Nuralam Howlader nazmul Ahasan md. Mizanur Rahman Department of Electrical and Electronic Engineering Hajee Mohammad Danesh Science and Technology University Dinajpur Bangladesh

Thin-film solar cells possess the distinct advantage of being cost-effective and relatively simple to manufacture. Nevertheless, it is of utmost importance to enhance their overall performance. In this research work, copper indium gallium selenide (CIGS)-based ultra-thin solar cell (SC) configuration (Ag/ZnO/ZnSe/CIGS/Si/Ni) has been designed and examined using SCAPS-1D. The numerical calculations revealed that this new design resulted in a substantial improvement in SC performance. This study explores the utilization of two absorber layers, CIGS and Si, both with a total of 2 μm thickness, to enhance device performance while reducing material costs, observing an increase in key SC parameters as the Si absorber layer thickness is increased, reaching a maximum efficiency of 29.13% when CIGS and Si thicknesses are set at 0.4 μm and 1.6 μm, respectively with doping absorber doping density of 1014 cm-3. Furthermore, we analyze the impact of variation in absorber and buffer layer thickness, as well as doping concentration, surface recombination velocity (SRV), electron affinity, series-shunt resistance, and temperature, on optimized CIGS SC parameters such as short-circuit current density (JSC), open circuit voltage (VOC), fill factor (FF), and power conversion efficiency (PCE). The findings yielded by the investigation offer significant elucidation regarding the fabrication of economically viable and highly efficient non-hazardous CIGS ultra-thin SC.

关键词： Thin-Flim CIGS-Based Solar Cell Non-Toxic Solar Cell SCAPS-1D Numerical Simulation Renewable Energy

Constrained coordinated distributed control of smart grid with asynchronous information exchange

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Journal of Modern Power Systems and Clean Energy 2015年第4期3卷 512-525页

作者： Benjamin MILLAR Danchi JIANG md.Enamul haque School of Engineering&ICT University of TasmaniaHobartAustralia School of Engineering Deakin UniversityMelbourneAustralia

Smart grid constrained optimal control is a complex issue due to the constant growth of grid complexity and the large volume of data available as input to smart device *** this context,traditional centralized control paradigms may suffer in terms of the timeliness of optimization results due to the volume of data to be processed and the delayed asynchronous nature of the data *** address these limits of centralized control,this paper presents a coordinated,distributed algorithm based on distributed,local controllers and a central coordinator for exchanging summarized global state *** proposed model for exchanging global state information is resistant to fluctuations caused by the inherent interdependence between local controllers,and is robust to delays in information *** addition,the algorithm features iterative refinement of local state estimations that is able to improve local controller ability to operate within network *** of the proposed coordinated,distributed algorithm through simulation shows its effectiveness in optimizing a global goal within a complex distribution system operating under constraints,while ensuring network operation stability under varying levels of information exchange delay,and with a range of network sizes.

关键词： Smart grid Distributed optimization Demand-side management Distributed generation Distributed storage Approximate dynamic programming

Plasma-Assisted Antimicrobial Finishing of Textiles: A Review

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Engineering 2022年第5期8卷 145-163页

作者： Maryam Naebe Abu Naser md.Ahsanul haque Aminoddin Haji Deakin University Institute for Frontier MaterialsGeelongVIC 3216Australia Textile Engineering Department Yazd UniversityYazd 89138-75639Iran

Owing to the ongoing pandemic,the importance of and demand for antimicrobial textiles have reached new *** addition to being used for medical purposes,antimicrobial textiles could be a self-defense entity against microbes for the general *** textiles are widely used,they can effectively be used to prevent the spread of microbes *** conventional antibacterial finishing process of textiles is the wet treatment method using either the pad–dry–cure or exhaustion ***,the textile wet treatment industries are major contributors to worldwide pollution,which is extremely *** the current and near-future high demand,it is imperative to include plasma in antimi-crobial finishing to achieve high efficiency in production,while retaining a safe ***,this paper reviews the rationale of plasma use in textile antimicrobial finishing through a critical analysis of recent studies and emphasizes the types and mechanisms of plasma techniques available for application.

关键词： Plasma Grafting Polymerization Sputtering Nanomaterials Antimicrobial

Nonlinear anisotropic finite element analysis of liquefiable tunnel–sand–pile interaction under seismic excitation

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Deep Underground Science and Engineering 2023年第3期2卷 275-285页

作者： md.Foisal haque Department of Civil Engineering Bangladesh University of Engineering and TechnologyDhakaBangladesh

Nonlinear time‐history analysis can be used to determine the liquefiable behaviors of the tunnel-sand-pile interaction(TSPI)model with the consideration of sand *** study presents the nonlinear response of the TSPI model with the existence of liquefaction under seismic *** analysis reveals that tunnel and pile behave as isotropic elements,while sand shows isotropic,orthotropic,and anisotropic *** constitutive models including UBC3D‐PLM(two yield surfaces associated with the hardening rule),NGI‐ADP(yielding with associated plastic potential function),and a user‐specified constitutive model are adopted to evaluate the isotropic,orthotropic,and anisotropic behaviors of *** this basis,two finite element‐based codes(ETABS 18.1.1 and Plaxis 3D)are used to evaluate sand behaviors and *** of the tunnel,sand,pile,and excess pore pressure ratio are recorded in the interaction zone by varying the pile diameter,tunnel diameter,and tunnel-pile *** with the orthotropic and isotropic conditions,lower variations of results are found in the anisotropic condition,except for the case of generation of excess pore *** addition,the present reanalysis results are in agreement with previous analytical and case study results,which further indicates the effectiveness of the finite element‐based numerical codes.

关键词： anisotropy finite element liquefaction nonlinear seismic excitation tunnel-sand-pile interaction

Estimation of Vitamins B-Complex (B2, B3, B5and B6) of Some Leafy Vegetables Indigenous to Bangladesh by HPLC Method

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Journal of Analytical Sciences, Methods and Instrumentation 2013年第3期3卷 24-29页

作者： md. nazmul Hasan M. Akhtaruzzaman md. Zakir Sultan Centre for Advanced Research in Sciences Uni- versity of Dhaka Dhaka Bangladesh Institute of Nutrition and Food Science University of Dhaka Dhaka Bangladesh

The current experiment was conducted for the simultaneous determination of several water-soluble vitamins like ribo- flavin (vitamin B2), niacin (vitamin B3), pantothenic acid (vitamin B5) and pyridoxine (vitamin B6) in five highly con- sumed local leafy vegetables named as bottle gourd leaves (Lagenaria vulgaris) (local name Lau shak), green amaranth leaves (Amaranthus viridis) (local name Data shak), red amaranth leaves (Amaranthus gangeticuss) (local name Lal shak), Indian spinach (Basella alba) (local name Pui shak) and bitter gourd leaves (Momordica charantia) (local name Korola shak). The analyses were performed by HPLC using an analytical reversed phase C-18 (ODS column, 250 × 4.6 mm, 5 μm, Phenomenex, Inc.) column with the mobile phase consisting of a mixture of buffer (hexane sulphonic acid sodium, potassium dihydrogen phosphate and triethylamine, pH 3.0) and methanol in the ratio of 96:4 (v/v) at a flow rate of 1 mL/min with UV detection at 210 nm. The retention times for the vitamins were obtained as 3.61 min, 6.37 min, 9.51 min and 11.51 min for Vitamins B2, B3, B5 and B6, respectively. These obtained values of the vitamins were compared with the values available in published literatures of Deshio Khaddar Pustiman (DKPM), Indian food value (IFV) and United States Department of Agriculture (USDA).

关键词： HPLC Analysis Vitamin B2 Vitamin B3 Vitamin B5 Vitamin B6 Leafy Vegetables