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Dynamical interactions between higher-order rogue waves and various forms ofn-soliton solutions(n→∞)of the(2+1)-dimensional ANNV equation

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Chinese Physics B 2020年第11期29卷 391-397页

作者： Md fazlul hoque Harun-Or-Roshid Fahad Sameer Alshammari Department of Mathematics Pabna University of Science and TechnologyPabna 6600Bangladesh Department of Mathematics College of Science at AlkharjPrince Sattam bin Abdulaziz UniversityAlkharjSaudi Arabia

We present new lemmas,theorem and corollaries to construct interactions among higher-order rogue waves,n-periodic waves and n-solitons solutions(n→∞)to the(2+1)-dimensional asymmetric Nizhnik-Novikov-Veselov(ANNV)*** examples for theories are given by choosing definite interactions of the wave solutions for the *** particular,we exhibit dynamical interactions between a rogue and a cross bright-dark bell wave,a rogue and a cross-bright bell wave,a rogue and a one-,two-,three-,four-periodic *** addition,we also present multi-types interactions between a rogue and a periodic cross-bright bell wave,a rogue and a periodic cross-bright-bark bell ***,we physically explain such interaction solutions of the model in the 3D and density plots.

关键词： the(2+1)-dimensional asymmetric Nizhnik-Novikov-Veselov(ANNV)equation higher-order rogue waves n-solitons periodic waves bright-dark bell waves

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Bifurcation Analysis and Bounded Optical Soliton Solutions of the Biswas-Arshed Model

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Computer Modeling in Engineering & Sciences 2023年第6期135卷 2197-2217页

作者： Fahad Sameer Alshammari Md fazlul hoque Harun-Or-Roshid Muhammad Nadeem Department of Mathematics College of Science at AlkharjPrince Sattam bin Abdulaziz UniversityAlkharj11942Saudi Arabia Department of Mathematics Pabna University of Science and TechnologyPabna6600Bangladesh Faculty of Science Yibin UniversityYibin644000China

We investigate the bounded travelling wave solutions of the Biswas-Arshed model(BAM)including the low group velocity dispersion and excluding the self-phase *** integrate the nonlinear structure of the model to obtain bounded optical solitons which pass through the optical fibers in the non-Kerr *** bifurcation technique of the dynamical system is used to achieve the parameter bifurcation sets and split the parameter space into various areaswhich correspond to different phase *** bounded optical solitons and bounded periodic wave solutions are identified and derived conforming to each region of these phase *** also apply the extended sinh-Gordon equation expansion and the generalized Kudryashov integral schemes to obtain additional bounded optical soliton solutions of the BAM *** present more bounded optical shock waves,the bright-dark solitary wave,and optical rogue waves for the structure model via these schemes in different aspects.

关键词： The Biswas-Arshed model the extended sinh-Gordon equation expansion the generalized Kudryashov approach shock wave double solitons optical singular double solitons chirp-free bright-dark double solitons

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Evaluation of preventive,supportive and awareness building measures among international students in China in response to COVID-19:a structural equation modeling approach

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Global Health Research and Policy 2021年第1期6卷 404-413页

作者： Tanwne Sarker Apurbo Sarkar Md.Ghulam Rabbany Milon Barmon Rana Roy Md.Ashfikur Rahman Kh.Zulfikar Hossain fazlul hoque Muhammad Asaduzzaman School of Economics and Finance Xi’an Jiaotong UniversityXi’anShaanxi 710049People’s Republic of China College of economics and management Northwest A&F UniversityYanglingShaanxi 712100People’s Republic of China Department of agribusiness and marketing Sher-e-Bangla Agricultural UniversityDhaka 1207Bangladesh Institute of Soil and Water Conservation Northwest A&F UniversityYanglingShaanxi 712100People’s Republic of China College of Natural Resource and Environment Northwest A&F UniversityYanglingShaanxi 712100People’s Republic of China Department of Agroforestry&Environmental Science Sylhet Agricultural UniversitySylhet 3100Bangladesh Centre for Global Health University of OsloKirkeveien 166Frederik Holsts hus0450 OsloNorway

Background:Education institutions promptly implemented a set of steps to prevent the spread of COVID-19 among international Chinese students,such as restrictive physical exercise,mask wear,daily health reporting,*** of such behavioral change campaigns largely depends on awareness building,satisfaction and trust on the *** purpose of this current study is to assess the preventive,supportive and awareness-building steps taken during the COVID-19 pandemic for international students in China,that will be useful for planning such a behavioral change campaign in the potential pandemic situation in other parts of the ***:We conducted an online-based e-questionnaire survey among 467 international students in China through *** data collection duration was from February 20,2020 to March 10,2020 and we focused on their level of awareness,satisfaction,and trust in authorities regarding pandemic *** bivariate statistics was used to describe the background characteristics of the respondents along with adoption of the partial least squares-structural equation modeling(PLS-SEM)as the final model to demonstrate the relationship between the ***:In our study,the leading group of the respondents were within 31 to 35 years’age group(39.82%),male(61.88%),living single(58.24%)and doctoral level students(39.8%).The preventive and supportive measures taken by students and/or provided by the respective institution or authorities were positively related to students’satisfaction and had an acceptable strength(β=0.611,t=9.679,p<0.001).The trust gained in authorities also showed an acceptable strength(β=0.381,t=5.653,p<0.001)with a positive ***,the personnel awareness building related to both students’satisfaction(β=0.295,t=2.719,p<0.001)and trust gain(β=0.131,t=1.986,p<0.05)in authorities had a positive and acceptable ***,our study clearly demonstrates the great impact of preventive and supportive measure

关键词： COVID-19 Awareness building Epidemic PLS-SEM Supportive measures Trust international student modeling

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Effect of Concentrate to Roughage Ratio on Cost Effective Growth Performance of Brahman Crossbred Calves

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Journal of Agricultural Science and Technology(A) 2015年第4期5卷 286-295页

作者： Mohammad Mahbubur Rashid Khan Shahidul Huque Mohammad Azharul hoque Nathu Ram Sarker Abul Kashem fazlul Haque Bhuiyan 不详 Department of Animal Breeding and Genetics Bangladesh Agricultural University Mymensingh 2202 Bangladesh Bangladesh Livestock Research Institute Savar Dhaka 1341 Bangladesh

An experiment was conducted to evaluate the growth performance and cost per gain of Brahman × local crossbred bull calves receiving three diets with varying concentrate to roughage ratio （C：R） of 75：25, 65：35 and 55：45 on dry matter （DM） basis. Twelve bull calves （aging 11.5 ±1.2 months and 170.8 ± 13.0 kg live weight） divided into three equal groups were fed on three diets. The diets were balanced to 14.5% crude protein （CP） level and 10.5 MJ metabolizable energy （ME） per kg DM, formulating different concentrate mixtures. German grass （Echinoclora grousgali） and paddy straw were offered at 2：1 ratio on DM basis as roughages. The results revealed that C：R ratio did not affect （P 〉 0.05） the intake of feed and nutrients, feed efficiency （7.04, 6.94 and 6.76） and average daily gain （981,958 and 976 g）. Digestibility of nutrients was not affected （P 〉 0.05） by C：R. Animals fed diet with C：R = 55：45 had the lowest feed cost （Bangladeshi Taka 136.8 BDT/kg live weight gain）, which was increased （147.5 B DT and 153.8 BDT） non-significantly （P 〉 0.05） with the increasing level of concentrate. The diet consisting of 55% concentrate mixture showed similar results with the diet consisting of 75% concentrate mixture, but was comparatively economic. Therefore, considering the growth performance and cost per kg gain of Brahman crossbred growing calves, it may be concluded that the diet consisting of 55：45 C：R may be used for economic beef production.

关键词： Brahman crossbred concentrate to roughage ratio growth iso-nitrogenous.

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