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Influence of Various Earth-Retaining Walls on the Dynamic Response Comparison Based on 3D Modeling

Computer Modeling in Engineering & Sciences 2024年第6期139卷 2835-2863页

作者： Muhammad Akbar Huali Pan Jiangcheng Huang bilal ahmed.guoqiang ou Institute of Mountain Hazards and Environment Chinese Academy of SciencesChengdu610000China Institute of International Rivers and Eco-Security Yunnan UniversityKunming650500China Department of Structural Engineering Faculty of Civil EngineeringDoctoral SchoolAkademicka 2Silesian University of TechnologyGliwice44-100Poland

The present work aims to assess earthquake-induced earth-retaining(ER)wall *** study is on the dynamics analysis of various earth-retaining wall designs in hollow precast concrete panels,reinforcement concrete facing panels,and gravity-type earth-retaining *** finite element(FE)simulations utilized a 3D plane strain condition to model full-scale ER walls and numerous nonlinear dynamics *** seismic performance of differentmodels,which includes reinforcement concrete panels and gravity-type and hollowprecast concrete ER walls,was simulated and examined using the FE *** also displays comparative studies such as stress distribution,deflection of the wall,acceleration across the wall height,lateral wall displacement,lateral wall pressure,and backfill plastic *** components of the created ER walls were found throughout this research *** is a granular reinforcement backfill,while the other is a wall-facing panel and base *** dynamic response effects of varied earth-retaining walls have also been *** was discovered that the facing panel of the model significantly impacts the earthquake-induced displacement of ER *** proposed analytical model’s validity has been evaluated and compared with the reinforcement concrete facing panels,gravity-type ER wall,scientifically available data,and American Association of State Highway and Transportation Officials(AASHTO)guidelines results based on FE *** results of the observations indicate that the hollow prefabricated concrete ER wall is the most feasible option due to its lower displacement and high-stress distribution compared to the two *** methodology and results of this study establish standards for future analogous investigations and professionals,particularly in light of the increasing computational capabilities of desktop computers.

关键词： Seismic analysis finite element modeling earth-retaining ER walls dynamic response structural resilience

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Artificial Intelligence Based Meteorological Parameter Forecasting for Optimizing Response of Nuclear Emergency Decision Support System

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原子能科学技术 2024年第10期58卷 2068-2076页

作者： bilal ahmed Khan HASEEB ur Rehman QAISAR Nadeem MUHAMMAD Ahmad Naveed Qureshi JAWARIA Ahad MUHAMMAD Naveed Akhtar AMJAD Farooq MASROOR Ahmad Pakistan Institute of Engineering and Applied Sciences Islamabad 44000Pakistan

This paper presents a novel artificial intelligence (AI) based approach to predict crucial meteorological parameters such as temperature,pressure,and wind speed,typically calculated from computationally intensive weather research and forecasting (WRF) *** meteorological data is indispensable for simulating the release of radioactive effluents,especially in dispersion modeling for nuclear emergency decision support *** of meteorological conditions during nuclear emergencies using the conventional WRF model is very complex and ***,a new artificial neural network (ANN) based technique was proposed as a viable alternative for meteorological prediction.A multi-input multi-output neural network was trained using historical site-specific meteorological data to forecast the meteorological *** evaluation of this technique was conducted to test its performance in forecasting various parameters including atmospheric pressure,temperature,and wind speed components in both East-West and North-South *** performance of developed network was evaluated on an unknown dataset,and acquired results are within the acceptable range for all meteorological *** show that ANNs possess the capability to forecast meteorological parameters,such as temperature and pressure,at multiple spatial locations within a grid with high accuracy,utilizing input data from a single ***,accuracy is slightly compromised when predicting wind speed *** mean square error (RMSE) was utilized to report the accuracy of predicted results,with values of 1.453℃for temperature,77 Pa for predicted pressure,1.058 m/s for the wind speed of U-component and 0.959 m/s for the wind speed of *** conclusion,this approach offers a precise,efficient,and wellinformed method for administrative decision-making during nuclear emergencies.

关键词： prediction of meteorological parameters weather research and forecasting model artificial neural networks nuclear emergency support system

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Heterogeneously elevated branched-chain/aromatic amino acids among new-onset type-2 diabetes mellitus patients are potentially skewed diabetes predictors

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World Journal of Diabetes 2024年第1期15卷 53-71页

作者： Min Wang Yang ou Xiang-Lian Yuan Xiu-Fang Zhu Ben Niu Zhuang Kang Bing Zhang Anwar ahmed Guo-Qiang Xing Heng Su School of Chemical Science and Technology Yunnan UniversityKunming 650091Yunnan ProvinceChina Department of Endocrinology The First People’s Hospital of Yunnan ProvinceKunming 650032Yunnan ProvinceChina Clinical Laboratory Nanchong Central Hospital&The Second Clinical Medical College of North Sichuan Medical UniversityNanchong 637000Sichuan ProvinceChina Department of Preventive Medicine and Biostatistics Uniformed Services University of the Health SciencesBethesdaMD 20814United States The Affiliated Hospital and Second Clinical Medical College North Sichuan Medical UniversityNanchong 637000Sichuan ProvinceChina Department of Research and Development Lotus *** LLCGaithersburgMD 20878United States

BACKGRouND The lack of specific predictors for type-2 diabetes mellitus(T2DM)severely impacts early intervention/prevention *** branched-chain amino acids(BCAAs:Isoleucine,leucine,valine)and aromatic amino acids(AAAs:Tyrosine,tryptophan,phenylalanine)show high sensitivity and specificity in predicting diabetes in animals and predict T2DM 10-19 years before T2DM onset in clinical ***,improvement is needed to support its clinical *** To evaluate the effects of body mass index(BMI)and sex on BCAAs/AAAs in new-onset T2DM individuals with varying body *** Ninety-seven new-onset T2DM patients(ously elevated amino acids,especially BCAAs/AAAs,across new-onset T2DM patients in differing BMI categories revealed a potentially skewed prediction of T2DM *** higher BCAA/AAA levels in obese T2DM patients would support T2DM prediction in obese individuals,whereas the lower levels of BCAAs/AAAs in NW-T2DM individuals may underestimate T2DM risk in NW *** potentially skewed T2DM prediction should be considered when BCAAs/AAAs are to

关键词： Hyperaminoacidemia Branched-chain/aromatic amino acids New-onset type-2 diabetes Predictor Obesity Sex

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Evaluation and management of acute pancreatitis

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World Journal of Clinical Cases 2019年第9期7卷 1006-1020页

作者： ahmed T Chatila Mohammad bilal Praveen Guturu Department of Internal Medicine The University of Texas Medical Branch Division of Gastroenterology and Hepatology The University of Texas Medical Branch Division of Gastroenterology and Hepatology the University of Texas Medical Branch

Acute pancreatitis(AP) is one of the most common gastrointestinal causes for hospi-talization in the United States. In 2015, AP accounted for approximately390000 hospitalizations. The burden of AP is only expected to increase over *** recent advances in medicine, pancreatitis continues to be associated with a substantial morbidity and mortality. The most common cause of AP is gallstones, followed closely by alcohol use. The diagnosis of pancreatitis is established with any two of three following criteria:(1) Abdominal pain consistent with that of AP;(2) Serum amylase and/or lipase greater than three times the upper limit of normal; and(3) Characteristics findings seen in crosssectional abdominal imaging. Multiple criteria and scoring systems have been established for assessing severity of AP. The cornerstones of management include aggressive intravenous hydration, appropriate nutrition and pain *** retrograde cholangiopancreatography and surgery are important aspects in management of acute gallstone pancreatitis. We provide a comprehensive review of evaluation and management of AP.

关键词： Acute pancreatitis Necrotizing pancreatitis Resuscitation Gallstone pancreatitis

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Near Field Radiative Heat Transfer between Parallel Plates with Flat and Rough Surfaces

Near Field Radiative Heat Transfer between Parallel Plates w...

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作者： bilal ahmed 哈尔滨工业大学

学位级别：硕士

当高温和低温热源的间距小于热辐射特征波长时,辐射换热特性发生很大变化,此时电磁波的干涉效应和光子隧穿效应尤为显著。经典的宏观辐射传输理论基于几何光学,忽略了光的干涉效应。目前的研究结果表明,间距为纳米尺度的辐射换热量比斯... 详细信息

当高温和低温热源的间距小于热辐射特征波长时,辐射换热特性发生很大变化,此时电磁波的干涉效应和光子隧穿效应尤为显著。经典的宏观辐射传输理论基于几何光学,忽略了光的干涉效应。目前的研究结果表明,间距为纳米尺度的辐射换热量比斯忒潘·玻尔兹曼定律的预测值高出约5个数量级。本文结合有效介质理论,分析了具有梯度折射率的各向异性多层平行平板结构的近场辐射换热。利用此方法,本文以碳化硅、二氧化硅和铝为对象,分析了不同结构(如平面-粗糙表面、粗糙表面-粗糙表面)的近场辐射换热,并与平行平板结构作对比。以涨落耗散理论为基础,结合麦克斯韦方程组和并矢格林函数,近场辐射换热热流得以求解。借助各平板的表面导纳,可以求解每个交界面上的s偏振和p偏振的反射系数和折射系数。为了验证计算结果的准确性,本文对各向异性多层介质间的近场热流作了收敛性检验。研究结果表明,由于粗糙效应的影响,碳化硅和二氧化硅粗糙表面间的近场换热得到加强,而铝粗糙表面的近场换热被微弱抑制。除粗糙表面平行平板结构之外,本文还计算了粗糙表面-平板之间的近场换热。研究发现,二氧化硅粗糙表面-平板结构的近场换热略强于粗糙表面之间。在此种情形下,同样由于粗糙效应,宽频域内的频谱热流增大。近场热辐射是提高能量收集设备(如热光伏设备)能量转换效率和输出功率的最有潜力的方式之一。通过有效的控制,使辐射换热支配能量传输过程,这可以提高其他材料的能量传输效率。同时,也可以用于热整流、热晶体管、辐射制冷等众多领域。

关键词：近场辐射平行板各向异性多层结构梯度折射率分布有效介质理论粗糙表面

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Children with lysinuric protein intolerance: Experience from a lower middle income country

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World Journal of Clinical Pediatrics 2022年第4期11卷 369-374页

作者： Syed bilal Hashmi Sibtain ahmed Department of Pathology and Laboratory Medicine Aga Khan University HospitalKarachi 74800Pakistan

BACKGRouND Lysinuric protein intolerance(LPI)is an inborn error of metabolism consequential to recessive mutations in the SLC7A7 *** metabolic imbalance in absorption and excretion of dibasic amino acids is considered the basis of *** disease results from protein intolerance with signs and symptoms oscillating from cerebral impairment,respiratory involvement,renal failure and autoimmune *** To determine biochemical and clinical presentation of cases with biochemical picture suggestive of LPI in Pakistani *** The study was conducted at the Biochemical Genetic Lab,Department of Pathology and Laboratory Medicine,AKU Plasma,and urine amino acid quantification data from January 2013 to October 2018 was included in this *** amino acids were analyzed by high performance liquid *** requisition forms were used to obtain the clinicopathological *** analysis was done by Microsoft Excel *** A total of 6 patients were *** the patients were male(100%).The mean age was 24 mo±10 *** the patients had low plasma concentration of lysine,ornithine and arginine,whereas increased levels of lysine,ornithine and arginine in urine were observed in 2 *** of consanguineous marriage was present in all patients(100%).The most observed clinical symptom was feeding difficulty followed by failure to thrive(83.3%)and developmental delay(66.6%).Hepatomegaly was present in all patients(100%).No mutation analysis was *** This study portrays the biochemical and clinical spectrum of LPI in *** clinical manifestations appeared in the first 2 years of life,most of them suffered a delay in undergoing diagnostic workup.

关键词： Lysinuric protein intolerance Consanguinity Pakistan Retrospective study

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Thermally Radiative Rotating Magneto-Nanofluid Flow over an Exponential Sheet with Heat Generation and Viscous Dissipation:A Comparative Study

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Communications in Theoretical Physics 2018年第3期69卷 317-328页

作者： M.Sagheer M.bilal S.Hussain R.N.ahmed Department of Mathematics Capital University of Science and Technology

This article examines a mathematical model to analyze the rotating flow of three-dimensional water based nanofluid over a convectively heated exponentially stretching sheet in the presence of transverse magnetic field with additional effects of thermal radiation,Joule heating and viscous ***(Ag),copper(Cu),copper oxide(Cu O),aluminum oxide(Al_2O_3)and titanium dioxide(Ti O_2)have been taken under consideration as the nanoparticles and water(H_2O)as the base *** suitable similarity transformations,the governing partial differential equations(PDEs)of the modeled problem are transformed to the ordinary differential equations(ODEs).These ODEs are then solved numerically by applying the shooting *** the particular situation,the results are compared with the available *** effects of different nanoparticles on the temperature distribution are also discussed graphically and *** is witnessed that the skin friction coefficient is maximum for silver based ***,the velocity profile is found to diminish for the increasing values of the magnetic parameter.

关键词： magnetohydrodynamics nanofluid viscous dissipation thermal radiation rotating flow

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General election effect on the network topology of Pakistan’s stock market: network-based study of a political event

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Financial Innovation 2020年第1期6卷 42-55页

作者： bilal ahmed Memon Hongxing Yao Rabia Tahir School of Finance and Economics Jiangsu University01 Xuefu RoadZhenjiang 212013JiangsuChina School of Computer Science Jiangsu universityZhenjiang 212013China

To examine the interdependency and evolution of Pakistan’s stock market,we consider the cross-correlation coefficients of daily stock returns belonging to the blue chip Karachi stock exchange(KSE-100)*** the minimum spanning tree network-based method,we extend the financial network literature by examining the topological properties of the network and generating six minimum spanning tree networks around three general elections in *** results reveal a star-like structure after the general elections of 2018 and before those in 2008,and a tree-like structure *** also highlight key nodes,the presence of different clusters,and compare the differences between the three ***,the sectorial centrality measures reveal economic expansion in three industrial sectors—cement,oil and gas,and ***,a strong overall intermediary role of the fertilizer sector is *** results indicate a structural change in the stock market network due to general ***,through this analysis,policy makers can focus on monitoring key nodes around general elections to estimate stock market stability,while local and international investors can form optimal diversification strategies.

关键词： Minimum spanning tree Centrality measures General elections Emerging market Pakistan Stock market network

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A Hybrid Duo-Deep Learning and Best Features Based Framework for Action Recognition

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Computers, Materials & Continua 2022年第11期73卷 2555-2576页

作者： Muhammad Naeem Akbar Farhan Riaz ahmed bilal Awan Muhammad Attique Khan Usman Tariq Saad Rehman National University of Sciences and Technology(NUST) Islamabad46000Pakistan Department of Computer Science HITEC UniversityTaxilaPakistan College of Computer Engineering and Science Prince Sattam Bin Abdulaziz UniversityAl-Kharaj 11942Saudi Arabia

Human Action Recognition(HAR)is a current research topic in the field of computer vision that is based on an important application known as video *** in computer vision have introduced various intelligent methods based on deep learning and machine learning,but they still face many challenges such as similarity in various actions and redundant *** proposed a framework for accurate human action recognition(HAR)based on deep learning and an improved features optimization algorithm in this *** deep learning feature extraction to feature classification,the proposed framework includes several critical *** training fine-tuned deep learning models–MobileNet-V2 and Darknet53–the original video frames are *** feature extraction,pre-trained deep models are used,which are fused using the canonical correlation *** that,an improved particle swarm optimization(IPSO)-based algorithm is used to select the best *** that,the selected features were used to classify actions using various *** experimental process was performed on six publicly available datasets such as KTH,UT-Interaction,UCF Sports,Hollywood,IXMAS,and UCF YouTube,which attained an accuracy of 98.3%,98.9%,99.8%,99.6%,98.6%,and 100%,*** comparison with existing techniques,it is observed that the proposed framework achieved improved accuracy.

关键词： Action recognition deep learning features fusion features selection recognition

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Hereditary hemochromatosis:Temporal trends,sociodemographic characteristics,and independent risk factor of hepatocellular cancer–nationwide population-based study

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World Journal of Hepatology 2022年第9期14卷 1804-1816页

作者： Maryam bilal Haider Ali Al Sbihi ahmed Jamal Chaudhary Syed M Haider ahmed Iqbal Edhi Department of Internal Medicine Detroit Medical CenterWayne State UniversitySinai Grace HospitalDetroitMI 48235United States System Science Binghamton UniversityBinghamtonNY 13902United States Department of Gastroenterology William Beaumont HospitalRoyal OakMI 48073United States

BACKGRouND Hereditary hemochromatosis(HH)has an increased risk of hepatocellular cancer(HCC)both due to genetic risks and iron overload as iron overload can be carcinogenic;HH impacts the increasing risk of HCC,not only through the development of cirrhosis but concerning hepatic iron deposition,which has been studied further *** To evaluate HH yearly trends,patient demographics,symptoms,comorbidities,and hospital *** secondary aim sheds light on the risk of iron overload for developing HCC in HH patients,independent of liver cirrhosis *** study investigated HH(without cirrhosis)as an independent risk factor for *** We analyzed data from National Inpatient Sample(NIS)Database,the largest national inpatient data collection in the United States,and selected HH and HCC *** was first defined in 2011 International Classification of Disease-9th edition(ICD-9)as a separate diagnosis;the HH cohort is extracted from January 2011 to December 2019 using 275.01(ICD-9)and E83.110(ICD-10)diagnosis codes of *** were excluded from the HH cohort if they had a primary or secondary diagnostic code of cirrhosis(alcoholic,non-alcoholic,and biliary),viralhepatitis,alcoholic liver disease,non-alcoholic fatty liver disease(NAFLD),and non-alcoholic steatohepatitis(NASH).We removed these patients from the HH cohort to rule out bias or ICD-10 diagnostic *** HCC cohort is selected from January 2011 to December 2019 using the ICD-9 and ICD-10 codes of *** selected a non-HCC cohort with the 1:1 fixed ratio nearest neighbor(greedy)propensity score method using the patients'age,gender,and *** performed multivariate analysis for the risk factors of HCC in the HCC and non-HCC matched *** further analyzed HH without cirrhosis(removing HH patients with a diagnosis of cirrhosis)as an independent risk factor of HCC after adjusting all known risk factors of HCC in the multivariate *** During the 2011-2019 period,a total o

关键词： Hereditary hemochromatosis Hepatocellular carcinoma,cirrhosis Hepatitis Diabetes mellitus Nonalcoholic fatty liver disease Nonalcoholic steatohepatitis Wilson disease Alpha1-antitrypsin deficiency Blood transfusion Epidemiology Demographics Big data Hospitalization

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