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Bayesian Optimized LightGBM model for predicting the fundamental vibrational period of masonry infilled RC frames

Frontiers of Structural and Civil Engineering 2024年第7期18卷 1084-1102页

作者： Taimur RAHMAN Pengfei ZHENG shamima sultana Department of Civil Engineering World University of BangladeshDhaka 1230Bangladesh School of Civil Engineering Zhengzhou UniversityZhengzhou 450001China Department of Computer Science&Engineering University of Asia PacificDhaka 1205Bangladesh

The precise prediction of the fundamental vibrational period for reinforced concrete(RC)buildings with infilled walls is essential for structural design,especially earthquake-resistant *** learning models from previous studies,while boasting commendable accuracy in predicting the fundamental period,exhibit vulnerabilities due to lengthy training times and inherent dependence on pre-trained models,especially when engaging with continually evolving data *** predicament emphasizes the necessity for a model that adeptly balances predictive accuracy with robust adaptability and swift data *** latter should include consistent re-training ability as demanded by realtime,continuously updated data *** research implements an optimized Light Gradient Boosting Machine(LightGBM)model,highlighting its augmented predictive capabilities,realized through the astute use of Bayesian Optimization for hyperparameter tuning on the FP4026 research data set,and illuminating its adaptability and efficiency in predictive *** results show that the R^(2) score of LightGBM model is 0.9995 and RMSE is 0.0178,while training speed is 23.2 times faster than that offered by XGBoost and 45.5 times faster than for Gradient ***,this study introduces a practical application through a streamlit-powered,web-based dashboard,enabling engineers to effortlessly utilize and augment the model,contributing data and ensuring precise fundamental period predictions,effectively bridging scholarly research and practical applications.

关键词： masonry-infilled RC frame fundamental period LightGBM FP4026 research dataset machine learning data-driven approach Bayesian Optimization

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Hamiltonian Formulation for Water Wave Equation

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Open Journal of Fluid Dynamics 2013年第2期3卷 75-81页

作者： shamima sultana Zillur Rahman Department of Applied Mathematics University of Rajshahi Rajshahi Bangladesh

This paper concerns the development and application of the Hamiltonian function which is the sum of kinetic energy and potential energy of the system. Two dimensional water wave equations for irrotational, incompressible, inviscid fluid have been constructed in cartesian coordinates and also in cylindrical coordinates. Then Lagrangian function within a certain flow region is expanded under the assumption that the dispersion μ and the nonlinearity ε satisfied . Using Hamilton’s principle for water wave evolution Hamiltonian formulation is derived. It is obvious that the motion of the system is conservative. Then Hamilton’s canonical equation of motion is also derived.

关键词： Water Wave Equation Lagrangian Function Hamiltonian Function Hamilton’s Canonical Equation of Motion

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Molecular characterization of sweet potato(Ipomoea batatas[L.]Lam)germplasms for desirable traits by using simple sequence repeats markers

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BIOCELL 2023年第1期47卷 227-237页

作者： KHANDAKAR ABUMDMOSTAFIZAR RAHMAN ABDUL SHUKOR JURAIMI MDREZWAN MOLLA MUHAMMAD ASYRAFMD HATTA ZULKEFLY BIN SULAIMAN shamima sultana AHMED GABER BENUKAR BISWAS AKBAR HOSSAIN Tuber Crop Research Centre Bangladesh Agricultural Research InstituteGazipur1701Bangladesh Department of Crop Science Faculty of AgricultureUniversiti Putra MalaysiaUPMKuala Lumpur43400Malaysia Plant Genetic Resources Centre Bangladesh Agricultural Research InstituteGazipur1701Bangladesh Department of Agriculture Technology Faculty of AgricultureUniversiti Putra MalaysiaUPMKuala Lumpur43400Malaysia Regional Agricultural Research Station Bangladesh Agricultural Research InstituteCumilla3500Bangladesh Department of Biology College of ScienceTaif UniversityTaif21944Saudi Arabia Department of Agronomy Bidhan Chandra Krishi ViswavidyalayaNadiaWB741252India Division of Agronomy Bangladesh Wheat and Maize Research InstituteDinajpur5200Bangladesh

Every breeding program that aims to create new and improved cultivars with desired traits mostly relies on information related to genetic ***,molecular characterization of germplasms is important to obtain target cultivars with desirable *** potato[Ipomoea batatas(L.)Lam]is widely considered the world’s most important crop,with great diversity in morphological and phenotypic *** genetic diversity of 20 sweet potato germplasms originating from Bangladesh,CIP,Philippines,Taiwan,and Malaysia were compared,which was accomplished by genetic diversity analysis by exploring 20 microsatellite DNA markers for germplasm characterization and *** information was effective in differentiating or clustering the sweet potato genotypes.A total of 64 alleles were generated using the 20 primers throughout the 20 germplasm samples,with locus IBS97 having the highest number of alleles(5),whereas locus IbU33 had the fewest alleles(2).The alleles varied in size from 105(IbU31)to 213 base pairs(IBS34).The Polymorphism Information Content(PIC)values for the loci IbL46 and IBS97 varied from 0.445 to ***97 has the highest number of effective alleles(3.704),compared to an average of *** average Shannon’s diversity index(H)was 1.003,ranging from 0.673 in IbU3 to 1.432 in *** value of gene flow(Nm)varied between 0.000 and 0.005,with an average of 0.003,whereas genetic differentiation(FST-values)ranged between 0.901 and *** sweet potato germplasm included in this study had a broad genetic ***1 ***9 and SP12 ***18 germplasm pairings had the greatest genetic distance(GD=0.965),while SP1 ***2 germplasm couples had the least genetic diversity(GD=0.093).Twenty genotypes were classified into two groups in the UPGMA dendrogram,with 16 genotypes classified as group“A”and the remaining four genotypes,SP10,SP18,SP19,and SP20,classified as group“B.”According to cluster analysis,the anticipated heterozygosity(gene diversity)of Nei

关键词： Sweet potato Simple sequence repeats(SSRs) Genetic diversity Dendrogram

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Post-Operative Mortality after Ileal Perforation at a Teaching Hospital in Dhaka City

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Surgical Science 2020年第2期11卷 25-31页

作者： Mahbuba Begum Mohammad A. Majid Din Mohammad Wahida Begum Md. Abdullah Yusuf shamima sultana Department of Surgery Medical College for Women & Hospital Dhaka Bangladesh Department of Surgery Dhaka Medical College Dhaka Bangladesh Department of Surgery Patuakhali Medical College Patuakhali Bangladesh Department of Neuroradiology & Imaging National Institute of Neurosciences & Hospital Dhaka Bangladesh Department of Microbiology National Institute of Neurosciences & Hospital Dhaka Bangladesh National Institute of Ophthalmology & Hospital Dhaka Bangladesh

Background: Ileal perforation is a very critical condition. Objectives: The purpose of the present study was to see the post-operative mortality after ileal perforation. Methodology: This prospective cohort study was conducted in the Department of Surgery at Dhaka Medical College Hospital, Dhaka, Bangladesh from September 2000 to December 2002 for period of 2 years and 3 months. All the patients presented with ileal perforation at any age with both sexes were included in this study. Patients were selected consecutively and the patients who showed ileal perforation at laparotomy were included in this study. Preoperative diagnosis was based on detailed history, complete physical examinations supported by plain x-ray abdomen in erect posture including both domes of diaphragm. After immediate resuscitation surgical treatment was undertaken as soon as possible following admission in all cases. The patients were followed up and the mortality profiles were recorded after surgical intervention. Result: Out of 53 patients having postoperative complications 38 patients were survived and 15 patients were expired. So total survivors were 85% and non-survivors 15%. In this study most of the mortality (12%) was attributed to septicemia and mode of death was multiple organ failure. Respiratory complications caused 2% mortality one patient died of ARDS and another elderly patient with preexisting bronchial asthma developed respiratory failure and was unresponsive to treatment. One death was related to faecal fistula followed by severe fluid, electrolyte and acid-base imbalance with peritonitis and gross sepsis. Conclusion: In conclusion, the mortality is significantly high due to septicemia, ARDS and faecal fistula.

关键词： Post-Operative Mortality Ileal Perforation Faecal Fistula

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Haematopoietic Effects of Amloki (<i>Emblica officinalis</i>) in Pregnancy with Iron Deficiency Anaemia

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Journal of Biosciences and Medicines 2020年第12期8卷 157-165页

作者： Tahmina Akter Qazi shamima Akhter Md. Shah Amran Saima Haque Lisa Ariza sultana Farhana sultana Rahnuma Ahmad Sayeda Tasnim Kamal Tamanna Binte Habib Farhana Rahman Department of Physiology Dhaka Medical College and Hospital Dhaka Bangladesh Department of Pharmaceutical Chemistry University of Dhaka Dhaka Bangladesh Department of Physiology Parkview Medical College and Hospital Sylhet Bangladesh Department of Physiology National Institute of Neurosciences and Hospital Dhaka Bangladesh Department of Physiology Dhaka Community Medical College Dhaka Bangladesh Department of Physiology Medical College for Women and Hospital Dhaka Bangladesh

Due to poverty and ignorance more than half of the pregnant women in developing country are suffering from iron deficiency anaemia (IDA). Different gastrointestinal side effects cause low compliance to iron supplementation. Amloki (Emblica officinalis) is very popular among pregnant women for its taste and traditional belief of well-being. The aim of this study is to determine the effects of amloki on RBC, WBC and Platelet count. Prospective comparative study was carried out on patients of Outpatient Department of Obstetrics and Gynecology, Dhaka Medical College Hospital from July 2016 to June 2017. A total of 43 pregnant women between the 13th to the 20th weeks of gestation with IDA were selected aged 18 - 36 years in this study. Anemic pregnant women supplemented with oral iron and amloki were considered as study group (A) and control group (B) were with only iron supplementation for 45 days. Total count of RBC, WBC and platelet were done in the Department of Hematology & BMT Unit, Dhaka Medical College Hospital, Dhaka. For statistical analysis, Paired Student’s “t” test and Unpaired Student’s “t” test were considered using SPSS 22.0 version. A significant increase (p < 0.05) of blood RBC count was observed after intervention of iron in both groups. There was also significant increase in RBC count in iron + amloki supplemented group than that of only iron supplemented group. In this study, there was also increase of WBC count in iron + amloki supplemented group and decrease of platelet count in both groups, but these changes were not statistically significant. It can be concluded that oral amloki supplementation causes increased blood RBC count in IDA with pregnancy.

关键词： Iron Deficiency Anaemia Pregnancy Amloki RED Blood Cell White Blood Cell Platelet

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