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Journal of Advanced Dielectrics 2021年第4期11卷 18-26页

作者： Mamataj Khatun ekramul kabir Department of Physics Aliah UniversityNewtown Campus Kolkata 700160India Department of Physics Darjeeling Govt.College Darjeeling 734101India

Organic molecular ferroelectric diisopropylammonium chloride(dipaCl)was successfully synthesized using diisopropylamine,hydrochloric acid(57%)and methanol *** permittivity,impedance,modulus spectroscopy and conductivity were systematically studied by Capacitance-Conductance(CP-G)measurements in the temperature range of 373-445 *** property tests clearly show that the organic molecular ferroelectric dipaCl obeys Curies-Weiss law 1/e=(T-T0)/*** real(Z′)and imaginary(Z″)parts of the electrical modulus were calculated from the various values of e′and e″.It is shown that AC conductivity satisfies the relation s(w)∞wn,where the power exponent n depends on temperature and *** Arrhenius equation,the activation energies Es and Eh are also calculated which describes the complete conduction mechanism of dipaCl.

关键词： Molecular ferroelectrics dielectric spectroscopy impedance spectroscopy conductivity

A systematic review of machine learning techniques for cattle identification:Datasets,methods and future directions

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Artificial Intelligence in Agriculture 2022年第1期6卷 138-155页

作者： Md ekramul Hossain Muhammad Ashad kabir Lihong Zheng Dave L.Swain Shawn McGrath Jonathan Medway School of Computing Mathematics and EngineeringCharles Sturt UniversityBathurstNSW 2795Australia Gulbali Institute for Agriculture Water and EnvironmentCharles Sturt UniversityWagga WaggaNSW 2678Australia TerraCipher Pty.Ltd. Alton DownsQLD 4702Australia Fred Morley Centre School of Animal and Veterinary SciencesCharles Sturt UniversityWagga WaggaNSW 2678Australia Food Agility CRC Ltd SydneyNSW 2000Australia

Increased biosecurity and food safety requirements may increase demand for efficient traceability and identification systems of livestock in the supply *** advanced technologies of machine learning and computer vision have been applied in precision livestock management,including critical disease detection,vaccination,production management,tracking,and health *** paper offers a systematic literature review(SLR)of vision-based cattle *** specifically,this SLR is to identify and analyse the research related to cattle identification using Machine Learning(ML)and Deep Learning(DL).This study retrieved 731 studies from four online scholarly ***-five articles were subsequently selected and investigated in *** the two main applications of cattle detection and cattle identification,all the ML based papers only solve cattle identification ***,both detection and identification problems were studied in the DL based *** on our survey report,the most used ML models for cattle identification were support vector machine(SVM),k-nearest neighbour(KNN),and artificial neural network(ANN).Convolutional neural network(CNN),residual network(ResNet),Inception,You Only Look Once(YOLO),and Faster R-CNN were popular DL models in the selected *** these papers,the most distinguishing features were the muzzle prints and coat patterns of *** binary pattern(LBP),speeded up robust features(SURF),scaleinvariant feature transform(SIFT),and Inception or CNN were identified as the most used feature extraction *** paper details important factors to consider when choosing a technique or *** also identified major challenges in cattle *** are few publicly available datasets,and the quality of those datasets are affected by the wild environment and movement while collecting *** processing time is a critical factor for a real-time cattle identification ***,a recommendati

关键词： Cattle identification Cattle detection Machine learning Deep learning Cattle farming

The effect of hemicellulose on the interparticle frictional behavior of lignocellulosic biomass particulates

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Particuology 2021年第2期19卷 16-22页

作者： ekramul Haque Ehite Eric Drumm Nourredine Abdoulmoumine Biosystems Engineering and Soil Science Department University of TennesseeKnoxvilleTN 37996USA Center for Renewable Carbon University of TennesseeKnoxvilleTN 37996USA

Lignocellulosic biomass material sourced from plants and herbaceous sources is considered as a prospective feedstock of inexpensive,potentially carbon-neutral *** biomass is structurally built on cellulose,hemicellulose,and lignin,which are present in varying concentrations based on the feedstock type and play distinct and not well understood mechanical functions in the flow *** frictional characteristics of lignocellulosic biomass particulates influence their flow behavior in ***,it is important to fundamentally investigate the relative contribution of cellulose,hemicellulose,and lignin to the frictional ***,these three biopolymers are interwoven into a complex matrix in the lignocellulosic biomass,thus making it hard to quantify the contribution of each *** this study,we selectively remove hemicellulose from switchgrass and investigate the effects of its diminishing concentration on the coefficient of *** observed that the angle of repose and,therefore,the coefficient of friction for a loose assembly of the control and treated switchgrass samples decrease with decreasing hemicellulose *** indicates the frictional resistance to flow for biomass particulate assemblies is at least proportional to the hemicellulose *** also established that the observed changes in the frictional behavior were not due to particle morphological characteristics.

关键词： Lignocellulosic biomass Frictional behavior Angle of repose Hot water extraction Switchgrass Hemicellulose removal

Arsenic Bioremediation Potential of Arsenite-Oxidizing Micrococcus sp. KUMAs15 Isolated from Contaminated Soil

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Pedosphere 2018年第2期28卷 299-310页

作者： Tanmoy PAUL Arindam CHAKRABORTY ekramul ISLAM Samir Kumar MUKHERJEE Department of Microbiology University of Kalyani

Environmental arsenic(As) contamination,considered as the largest mass poisoning of the human population,has become a serious health concern for the people of South East Asia,including those living in the Bengal *** As-resistant strain,KUMAs15,was isolated from the As-contaminated fields in Nadia Ddistrict in West Bengal,India and was evaluated for its possible use in environmental As *** identification based on 16S rDNA gene sequencing revealed that the strain belonged to the genus *** strain tolerated high levels of As and oxidized arsenite under the culture *** strain also accumulated large quantities of As when exposed to a wide range of environmentally relevant concentrations of inorganic *** of the aoxB,arsB,and arsC gene expression explained the underlying cause of arsenite oxidation and As accumulation by *** As-resistant strain KUMAs15 of Micrococcus *** suggested to be a potential environmental As decontaminant.

关键词： aoxB gene ars operon As accumulation As contamination As decontamination metal tolerance microbial surfaceadsorption

Electrochemical Formation of Polypyrrole-carboxymethylcellulose Conducting Polymer Composite Films

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Journal of Materials Science & Technology 2005年第5期21卷 661-665页

作者： H.N.M.ekramul Mahmud Anuar Kassim Zulkarnain Zainal Wan Mahmood Mat Yunus Faculty of Science Universiti Putra Malaysia43400 Serdang SelangorMalaysiaFaculty of Science Universiti Putra Malaysia43400 Serdang SelangorMalaysiaFaculty of Science Universiti Putra Malaysia43400 Serdang SelangorMalaysiaFaculty of Science Universiti Putra Malaysia43400 Serdang SelangorMalaysia

The electrochemical preparation of polypyrrole-carboxymethylcellulose （PPY-CMC） conducting polymer composite films on indium tin oxide （ITO） glass electrode from an aqueous solution containing pyrrole monomer, ptoluenesulfonate electrolyte and carboxymethylcellulose insulating polymer is reported. The characterization by Fourier transform infrared spectroscopy （FT-IR） shows that carboxymethylcellulose （CMC） has been successfully incorporated into polypyrrole structure forming PPY-CMC polymer composite films. The conductivity of the prepared composite films was found to increase with increaseing CMC concentration in pyrrole solution, The optical microscopic results show the influence of CMC concentration in the pyrrole solution over the morphological changes of the prepared films. The dynamic mechanical analysis （DMA） on the prepared PPY-CMC film reveals the higher plastic property of the PPY-CMC composite film.

关键词： Conducting polymer Polypyrrole Carboxymethylcellulose

Analgesic,antibacterial and central nervous system depressant activities of Albizia procera leaves

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Asian Pacific Journal of Tropical Biomedicine 2014年第4期4卷 279-284页

作者： Mahfuza Khatoon Hajera Khatun ekramul Islam Shahnaj Parvin Department of Pharmacy University of Rajshahi

Objective:To ascertain analgesic,antibacterial and central nervous system(CNS)depressant activities of ethyl acetate,dichloromethane and carbon tetrachloride fractions of methanol extract of Albizia proceru(***)***:Leaves extracts of *** were tested for analgesic activity by acetic acid induced and formalin test method in *** in vitro antibacterial activity was performed by agar well diffusion *** depressant activity was evaluated by hole cross and open field ***:All the extracts at 200 mg/kg exhibited significant(P<0.01)analgesic activity in acetic acid induced and formalin tests method in *** activity of the ethyl acetate fraction was almost same like as standard drug indomelhacin in acetic acid induced *** CNS depressant activity of the extracts at 500 mg/kg was comparable to the positive control diazepam as determined by hole cross and open field test *** extracts exhibited moderate antimicrobial activity against all the tested microorganisms(Staphylococcus aureus,Bacillus cereus,Pseudomonas aeruginosa,Esherichia coli,Shigetta *** boydii)at concentration of 0.8 mg/*** measured diameter of zone of inhibition for the extracts was within the range of 7 to 12 mm which was less than the standard kanamycin(16-24 mm).Conclusions:It is concluded that all the extracts possess potential analgesic and CNS depressants *** study also showed that different fractions of methanol extract could be potential sources of new antimicrobial agents.

关键词： Analgesic CNS depressants Antimicrobial Albizia procera leaves

A study on the compatibility of the generalized Kudryashov method to determine wave solutions

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Propulsion and Power Research 2021年第1期10卷 95-105页

作者： Hemonta Kumar Barman Md.ekramul Islam M.Ali Akbar Department of Applied Mathematics University of RajshahiRajshahi6205Bangladesh Department of Mathematics Pabna University of Science and TechnologyPabna6600Bangladesh

In this article,we establish solitary wave solutions to the Estevez-MansfieldClarkson(EMC)equation and the coupled sine-Gordon equations which are model equations to analyze the formation of shapes in liquid drops,surfaces of negative constant curvature,*** contriving the generalized Kudryashov *** extracted results introduce several types’solitary waves,such as the kink soliton,bell-shape soliton,compacton,singular soliton,peakon and other sort of soliton for distinct valuation of the unknown *** achieved analytic solutions are interpreted in details and their 2D and 3D graphs are *** obtained solutions and the physical structures explain the soliton phenomenon and reproduce the dynamic properties of the front of the travelling wave deformation generated in the dispersive *** shows that the generalized Kudryashov method is powerful,compatible and might be used in further works to found novel solutions for other types of nonlinear evolution equations ascending in physical science and engineering.

关键词： The nonlinear evolution equations(NLEEs) The Estevez-MansfieldClarkson(EMC)equation The coupled sineGordon equations The generalized Kudryashov method Solitons Analytic solutions

Wave profile analysis of a couple of(3+1)-dimensional nonlinear evolution equations by sine-Gordon expansion approach

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Journal of Ocean Engineering and Science 2022年第3期7卷 272-279页

作者： Md.Rezwan Ahamed Fahim Purobi Rani Kundu Md.ekramul Islam M.Ali Akbar M.S.Osman Department of Mathematics Pabna University of Science and TechnologyBangladesh Department of Applied Mathematics University of RajshahiBangladesh Department of Mathematics Faculty of ScienceCairo UniversityGiza 12613Egypt Department of Mathematics Faculty of Applied ScienceUmm Alqura UniversityMakkah 21955Saudi Arabia

The(3+1)-dimensional Kadomtsev-Petviashvili and the modified KdV-Zakharov-Kuznetsov equations have a significant impact in modern science for their widespread applications in the theory of long-wave propagation,dynamics of shallow water wave,plasma fluid model,chemical kinematics,chemical engineering,geochemistry,and many other *** this article,we have assessed the effects of wave speed and physical parameters on the wave contours and confirmed that waveform changes with the variety of the free factors in *** a result,wave solutions are extensively analyzed by using the balancing condition on the linear and nonlinear terms of the highest order and extracted different standard wave configurations,containing kink,breather soliton,bell-shaped soliton,and periodic *** extract the soliton solutions of the high-dimensional nonlinear evolution equations,a recently developed approach of the sine-Gordon expansion method is used to derive the wave solutions *** sine-Gordon expansion approach is a potent and strategic mathematical tool for instituting ample of new traveling wave solutions of nonlinear *** study established the efficiency of the described method in solving evolution equations which are nonlinear and with higher dimension(HNEEs).Closed-form solutions are carefully illustrated and discussed through diagrams.

关键词： Sine-Gordon expansion approach Kadomtsev-Petviashvili equation modified KdV-Zakharov-Kuznetsov equation soliton solutions

OPTICAL BAND GAP AND CONDUCTIVITY MEASUREMENTS OF POLYPYRROLE-CHITOSAN COMPOSITE THIN FILMS

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Chinese Journal of Polymer Science 2012年第1期30卷 93-100页

作者： Mahnaz M.Abdi H.N.M.ekramul Mahmud Luqman Chuah Abdullah Anuar Kassim Mohamad Zaki Ab.Rahman Josephine Liew Ying Chyi Laboratory of Biopolymer and Derivatives Institute of Tropical Forestry and Forest Products(INTROP) Universiti Putra Malaysia43400 SerdangSelangorMalaysia Department of Chemistry Faculty of Science University of Malaya50603Kuala LumpurMalaysia Department of Chemistry Faculty of Science Universiti Putra Malaysia43400 SerdangSelangorMalaysia Department of Physics Faculty of Science Universiti Putra Malaysia43400 SerdangSelangorMalaysia

Electrical conductivity and optical properties of polypyrrole-chitosan（PPy-CHI） conducting polymer composites have been investigated to determine the optical transition characteristics and energy band gap of composite *** two electrode method and I-V characteristic technique were used to measure the conductivity of the PPy-CHI thin films,and the optical band gap was obtained from their ultraviolet absorption *** upon experimental parameter,the optical band gap（E_g） was found within 1.30-2.32 eV as estimated from optical absorption *** band gap of the composite films decreased as the CHI content *** room temperature electrical conductivity of PPy-CHI thin films was found in the range of 5.84×10^（-7）-15.25×10^（-7） S·cm^（-1） depending on the chitosan *** thermogravimetry analysis（TGA） showed that the CHI can improve the thermal stability of PPy-CHI composite films.

关键词： Polymer composite Electron transition I-V characteristic technique Optical band gap Polypyrrole

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先进的三辊式粉碎机的设计

粮食与饲料工业 1991年第2期 42-43页

作者： ekramul Haque 陈汉东博士

辊式磨粉机(或粉碎机)在饲料厂和面粉厂得到广泛使用。粉碎过程的各个步骤都采用一对水平安装的磨辊。两个磨辊并排装置,轧点处留有适当的间隙两磨辊相向转动——左边的磨辊顺时针方向转动而右边磨辊为逆时针方向转动—物料从上方落入... 详细信息

辊式磨粉机(或粉碎机)在饲料厂和面粉厂得到广泛使用。粉碎过程的各个步骤都采用一对水平安装的磨辊。两个磨辊并排装置,轧点处留有适当的间隙两磨辊相向转动——左边的磨辊顺时针方向转动而右边磨辊为逆时针方向转动—物料从上方落入轧点。轧点处的研磨作用取决于磨辊和物料的特性、轧点处轧距的大小以及磨辊的转速。在面粉厂,各道工序采用1台辊式磨粉机,研磨过程重复多次。

关键词：粉碎机辊式设计饲料加工机械