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Numerical Analysis of Novel Coronavirus (2019-nCov) Pandemic Model with Advection

Computers, Materials & Continua 2021年第6期67卷 2933-2953页

作者： Shumaila Azam Nauman Ahmed Ali Raza Muhammad sajid iqbal Muhammad Rafiq Ilyas Khan Kottakkaran Sooppy Nisar Muhammad Ozair Ahmad Zafar iqbal Department of Mathematics and Statistics The University of LahoreLahorePakistan Department of Mathematics National College of Business Administration and Economics LahorePakistan Faculty of Engineering University of Central Punjab Lahore Pakistan Faculty of Mathematics and Statistics Ton Duc Thang UniversityHo Chi Minh City72915Vietnam Department of Mathematics College of Arts and Science at Wadi AldawaserPrince Sattam Bin Abdulaziz University11991AlkharjKingdom of Saudi Arabia Department of Mathematics University of Management and TechnologyLahorePakistan

Recently,the world is facing the terror of the novel corona-virus,termed as *** health institutes and researchers are continuously striving to control this *** this article,the SEIAR(susceptible,exposed,infected,symptomatically infected,asymptomatically infected and recovered)infection model of COVID-19 with a constant rate of advection is studied for the disease propagation.A simple model of the disease is extended to an advection model by accommodating the advection process and some appropriate parameters in the *** continuous model is transposed into a discrete numerical model by discretizing the domains,*** analyze the disease dynamics,a structure preserving non-standard finite difference scheme is *** steady states of the continuous system are described i.e.,virus free steady state and virus existing steady *** results show that both the steady states of the numerical design coincide with the fixed points of the continuous SEIAR *** of the state variables is ensured by applying the M-matrix theory.A result for the positivity property is *** the proposed numerical design,two different types of the stability are *** stability and linear stability for the projected scheme is examined by applying some standard *** Neuman stability test is applied to ensure linear *** reproductive number is described and its pivotal role in stability analysis is also *** and convergence of the numerical model is also *** graphs are presented via computer simulations to prove the worth and efficiency of the quarantine factor is explored graphically,which is helpful in controlling the disease *** the end,the conclusion of the study is also rendered.

关键词： 2019-nCov infectious model with advection reproductive number stability analysis numerical graphs

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Deep Learning with a Novel Concoction Loss Function for Identification of Ophthalmic Disease

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Computers, Materials & Continua 2023年第9期76卷 3763-3781页

作者： Sayyid Kamran Hussain Ali Haider Khan Malek Alrashidi sajid iqbal Qazi Mudassar Ilyas Kamran Shah Department of Computer Science TIMES InstituteMultan60000Pakistan Department of Software Engineering Faculty of Computer ScienceLahore Garrison UniversityLahore54000Pakistan Department of Computer Science Applied CollegeUniversity of TabukTabukSaudi Arabia Department of Information Systems College of Computer Sciences and Information TechnologyKing Faisal UniversityAl Hofuf31982Saudi Arabia Department of Mechanical Engineering College of EngineeringKing Faisal UniversityAl HofufSaudi Arabia

As ocular computer-aided diagnostic(CAD)tools become more widely accessible,many researchers are developing deep learning(DL)methods to aid in ocular disease(OHD)*** eye diseases like cataracts(CATR),glaucoma(GLU),and age-related macular degeneration(AMD)are the focus of this study,which uses DL to examine their *** imbalance and outliers are widespread in fundus images,which can make it difficult to apply manyDL algorithms to accomplish this analytical *** creation of efficient and reliable DL algorithms is seen to be the key to further enhancing detection *** the analysis of images of the color of the retinal fundus,this study offers a DL model that is combined with a one-of-a-kind concoction loss function(CLF)for the automated identification of *** study presents a combination of focal loss(FL)and correntropy-induced loss functions(CILF)in the proposed DL model to improve the recognition performance of classifiers for biomedical *** is done because of the good generalization and robustness of these two types of losses in addressing complex datasets with class imbalance and *** classification performance of the DL model with our proposed loss function is compared to that of the baseline models using accuracy(ACU),recall(REC),specificity(SPF),Kappa,and area under the receiver operating characteristic curve(AUC)as the evaluation *** testing shows that the method is reliable and efficient.

关键词： Deep learning multi-classification focal loss CNN eye disease

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Optimality of Solution with Numerical Investigation for Coronavirus Epidemic Model

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Computers, Materials & Continua 2021年第5期67卷 1713-1728页

作者： Naveed Shahid Dumitru Baleanu Nauman Ahmed Tahira Sumbal Shaikh Ali Raza Muhammad sajid iqbal Muhammad Rafiq Muhammad Aziz-ur Rehman Department of Mathematics and Statistics The University of LahoreLahorePakistan Department of Mathematics University of Management and TechnologyLahorePakistan Department of Mathematics Cankaya UniversityBalgatAnkara06530Turkey Department of Medical Research China Medical University HospitalChina Medical UniversityTaichungTaiwanChina Institute of Space Sciences Magurele-BucharestRomania Department of Mathematics Lahore College for Women UniversityLahorePakistan Department of Mathematics National College of Business Administration and Economics LahorePakistan Department of Mathematics Faculty of SciencesUniversity of Central PunjabLahorePakistan

The novel coronavirus disease,coined as COVID-19,is a murderous and infectious disease initiated from Wuhan,*** killer disease has taken a large number of lives around the world and its dynamics could not be controlled so *** this article,the spatio-temporal compartmental epidemic model of the novel disease with advection and diffusion process is projected and *** counteract these types of diseases or restrict their spread,mankind depends upon mathematical modeling and medicine to reduce,alleviate,and anticipate the behavior of disease *** existence and uniqueness of the solution for the proposed system are ***,the solution to the considered system is made possible in a well-known functions *** this purpose,a Banach space of function is chosen and the solutions are optimized in the closed and convex subset of the *** essential explicit estimates for the solutions are investigated for the associated auxiliary *** numerical solution and its analysis are the crux of this ***,the consistency,stability,and positivity are the indispensable and core properties of the compartmental models that a numerical design must *** this end,a nonstandard finite difference numerical scheme is developed to find the numerical solutions which preserve the structural properties of the continuous *** M-matrix theory is applied to prove the positivity of the *** results for the consistency and stability of the design are also presented in this *** plausibility of the projected scheme is indicated by an appropriate *** simulations are also exhibited to conclude the results.

关键词： Spatio-temporal advection diffusion explicit estimates auxiliary data M-matrix

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Numerical Analysis for the Effect of Irresponsible Immigrants on HIV/AIDS Dynamics

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Intelligent Automation & Soft Computing 2023年第5期36卷 1479-1496页

作者： Muhammad Tariq Ali Dumitru Baleanu Muhammad Rafiq Jan Awrejcewicz Nauman Ahmed Ali Raza Muhammad sajid iqbal Muhammad Ozair Ahmad Department of Mathematics Barani Institute of SciencesBurewalaPakistan Department of Mathematics Cankaya UniversityBalgatAnkara06530Turkey Department of Medical Research China Medical UniversityTaichung40402Taiwan Institute of Space Sciences Magurele-Bucharest077125Romania Department of Mathematics Faculty of SciencesUniversity of Central PunjabLahore54000Pakistan Department of Automation Biomechanics and MechatronicsLodz University of Technology1/15 Stefanowskiego St.90-924 LodzPoland Department of Mathematics and Statistics University of LahoreLahore54590Pakistan Department of Mathematics Govt.Maulana Zafar Ali Khan Graduate College WazirabadPunjab Higher Education Department(PHED)Lahore54000Pakistan H&BS MCSNational University of Science and Technology(NUST)H-12IslamabadHumayun RoadRawalpindi46000Pakistan

The human immunodeﬁciency viruses are two species of Lentivirus that infect *** time,they cause acquired immunodeﬁciency syndrome,a condition in which progressive immune system failure allows life-threatening opportunistic infections and cancers to *** immunodeﬁciency virus infection came from a type of chimpanzee in Central *** show that immunodeﬁciency viruses may have jumped from chimpanzees to humans as far back as the late *** decades,human immunodeﬁciency viruses slowly spread across Africa and later into other parts of the *** Susceptible-Infected-Recovered(SIR)models are signiﬁcant in studying disease *** this paper,we have studied the effect of irresponsible immigrants on HIV/AIDS dynamics by formulating and considering different ***,Runge Kutta,and a Non-standardﬁnite difference(NSFD)method are developed for the same *** experiments are performed at disease-free and endemic equilibria points at different time step sizes‘ℎ’.The results reveal that,unlike Euler and Runge Kutta,which fail for large time step sizes,the proposed Non-standardﬁnite difference(NSFD)method gives a convergence solution for any time step *** proposed numerical method is bounded,dynamically con-sistent,and preserves the positivity of the continuous solution,which are essential requirements when modeling a prevalent disease.

关键词： SIR model existence analysis numerical methods stability analysis

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丛枝菌根真菌对土壤重金属Pb植物修复效率的影响

丛枝菌根真菌对土壤重金属Pb植物修复效率的影响

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作者： Syed sajid iqbal 东北师范大学

学位级别：硕士

近年来,随着工业化进程的不断加快,土壤重金属污染已经成为一个全球性环境问题。这些重金属会通过食物链积累在人体内,危害人类健康。如何修复土壤重金属污染,已经成为当今环境科学领域亟待解决的重要问题。植物通过对重金属的富集作用... 详细信息

近年来,随着工业化进程的不断加快,土壤重金属污染已经成为一个全球性环境问题。这些重金属会通过食物链积累在人体内,危害人类健康。如何修复土壤重金属污染,已经成为当今环境科学领域亟待解决的重要问题。植物通过对重金属的富集作用,可以促进重金属向地上部分转移,且不破坏土壤的理化性质。丛枝菌根真菌(AMF)是广泛分布于陆地生态系统中最重要的土壤微生物之一,可与80%以上的陆地植物形成互利共生关系。AMF的群落组成和多样性对维持生态系统的功能和稳定性具有重要作用。AMF通过增强植物对养分的吸收和影响植物和土壤中的金属含量来促进植物生长和提高重金属污染土壤的植物修复效率。因此,AMF被广泛认为在土壤重金属修复中具有重要价值的生物材料。小叶鬼针草具有很强的重金属抗性,且被认为是重要的重金属Pb超富集植物。但是,AMF是否能够进一步提高小花鬼针草对Pb的修复效率,尚有待揭示。本研究通过室内控制试验,分析了AMF对小花鬼针草植物修复重金属Pb效率的影响。获得的主要结果如下:土壤Pb污染显著降低了植物的地上部和根系生物量,而菌根植物的地上部和根系干重高于非菌根植物;且AMF接种增加了植物根系的Pb浓度,但对于植物地上部的Pb浓度无影响;土壤Pb污染显著减少了植物叶片的叶绿素a和叶绿素b的含量,而AMF接种增加了叶绿素a(11.7%)和叶绿素b(5.8%)的含量;AMF接种提高了植物叶片净光合速率、气孔导度和蒸腾速率,但降低了植物叶片的胞间二氧化碳浓度,进而减轻重金属Pb污染对植物净光合速率的危害;另外,AMF缓解了重金属Pb污染对植物N和P元素吸收的抑制作用,但对植物K元素的吸收无影响;最后,AMF接种可通过影响植物根际磷酸酶和脲酶活性,进一步缓解Pb对植物N和P吸收的作用。综上所述,本研究表明AMF可以通过维持植物光合作用、增强植物元素吸收,以及提高植物根际土壤酶活性,促进植物生长并影响重金属Pb的浓度和分布特征,进而促进土壤重金属Pb的植物修复效率。植物-AMF共生体的应用能够显著提高植物修复的效益,为土壤中重金属Pb污染的修复提供了一种可行的防治策略。

关键词：重金属铅植物修复丛枝菌根真菌小花鬼针草

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Recent Developments in Authentication Schemes Used in Machine-Type Communication Devices in Machine-to-Machine Communication: Issues and Challenges

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Computers, Materials & Continua 2024年第4期79卷 93-115页

作者： Shafi Ullah Sibghat Ullah Bazai Mohammad Imran Qazi Mudassar Ilyas Abid Mehmood Muhammad Asim Saleem Muhmmad Aasim Rafique Arsalan Haider Ilyas Khan sajid iqbal Yonis Gulzar Kauser Hameed Department of Computer Engineering Balochistan University of Information TechnologyEngineering and Management SciencesQuetta87300Pakistan Department of Information Technology Balochistan University of Information TechnologyEngineeringand Management SciencesQuetta87300Pakistan Department of Information Systems College of Computer Sciences and Information TechnologyKing Faisal UniversityHofuf in Al-Ahsa31982Saudi Arabia Department of Management Information Systems College of Business AdministrationKing Faisal UniversityHofuf in Al-Ahsa31982Saudi Arabia Department of Software Engineering College of ComputingRiphah International UniversityFaisalabad44000Pakistan Department of Electrical Engineering Balochistan University of Information Technology Engineeringand Management SciencesQuetta87300Pakistan Department of Mathematics College of Science Al-ZulfiMajmaah UniversityAl-Majmaah11952Saudi Arabia

Machine-to-machine (M2M) communication plays a fundamental role in autonomous IoT (Internet of Things)-based infrastructure, a vital part of the fourth industrial revolution. Machine-type communication devices(MTCDs) regularly share extensive data without human intervention while making all types of decisions. Thesedecisions may involve controlling sensitive ventilation systems maintaining uniform temperature, live heartbeatmonitoring, and several different alert systems. Many of these devices simultaneously share data to form anautomated system. The data shared between machine-type communication devices (MTCDs) is prone to risk dueto limited computational power, internal memory, and energy capacity. Therefore, securing the data and devicesbecomes challenging due to factors such as dynamic operational environments, remoteness, harsh conditions,and areas where human physical access is difficult. One of the crucial parts of securing MTCDs and data isauthentication, where each devicemust be verified before data transmission. SeveralM2Mauthentication schemeshave been proposed in the literature, however, the literature lacks a comprehensive overview of current M2Mauthentication techniques and the challenges associated with them. To utilize a suitable authentication schemefor specific scenarios, it is important to understand the challenges associated with it. Therefore, this article fillsthis gap by reviewing the state-of-the-art research on authentication schemes in MTCDs specifically concerningapplication categories, security provisions, and performance efficiency.

关键词： Authentication cyber security internet of things machine-type communication devices machine-to-machine communication

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Comparative study of living donor kidney transplants:Right vs left

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World Journal of Transplantation 2025年第1期15卷 115-123页

作者： Taqi Khan Nadeem Ahmad Qaisar iqbal Muneeb Hassan Lajward Asnath Naveed Khan sajid Shakeel Kidney Transplant Unit Rehman Medical InstitutePeshawar 25100Khyber PakhtunkhwaPakistan Department of Surgery Princess Noura Binti AbdulRehman UniversityRiyadh 84428Saudi Arabia

BACKGROUND Transplant teams often hesitate to use the right kidney(RK)in living donor(LD)transplants due to the complexities of anastomosing the short,thin-walled right renal veins,which can potentially lead to graft loss or graft ***,circumstances may arise where selecting the RK over the left kidney(LK)is ***,it is crucial to thoroughly examine the implications of such a choice on the overall transplant *** To compare transplant outcomes between recipients of RK and LK while examining the factors that influence these *** We retrospectively analyzed data from adult patients who received LD kidney transplants involving meticulous patient selection and surgical techniques at our center from January 2020 to December *** included all kidney donors who were over 18,fit to donate,and had undergone diethylenetriamine pentaacetic acid split function and/or computed tomography based *** variables examined comprised donor and recipient demographics,and outcome measures included technical graft loss(TGL),delayed or slow graft function(SGF),and post-transplant serum creatinine(SC)*** used a logistic regression model to assess the likelihood of adverse outcomes considering the donor kidney *** Of the 250 transplants performed during the period,56(22%)were *** recipient demographics and transplant factors were comparable for the right and LKs,except that the donor warm and cold ischemia time were shorter for *** and SGF each occurred in 2%(n=1)of RKs and 0.5%(n=1)of LKs,the difference being *** complications,however,were not related to the venous *** RK(2%)developed delayed graft function after 48 hours,which was attributable to postoperative hypoxia rather than the surgical *** post-transplant SC trend and mean SC at the last follow-up were similar across both kidney *** The donor kidney side has little impact on post-transplant

关键词： Living donor Right kidney Right renal vein Venous anastomosis Technical graft loss Early graft function

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Alternative Strategy for Development of Dielectric Calcium Copper Titanate‑Based Electrolytes for Low‑Temperature Solid Oxide Fuel Cells

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Nano-Micro Letters 2025年第1期17卷 310-332页

作者： sajid Rauf Muhammad Bilal Hanif Zuhra Tayyab Matej Veis MAKYousaf Shah Naveed Mushtaq Dmitry Medvedev Yibin Tian Chen Xia Martin Motola Bin Zhu College of Mechatronics and Control Engineering Shenzhen UniversityShenzhen 518060People’s Republic of China Department of Inorganic Chemistry Faculty of Natural SciencesComenius University BratislavaIlkovicova684215 BratislavaSlovakia Energy Storage Joint Research Center School of Energy and EnvironmentSoutheast UniversityNanjing 210096People’s Republic of China Hydrogen Energy Laboratory Ural Federal University620002 EkaterinburgRussia Laboratory of Electrochemical Devices Based on Solid Oxide Proton Electrolytes Institute of High Temperature Electrochemistry620066 EkaterinburgRussia School of Microelectronics Hubei UniversityWuhan 430062People’s Republic of China

The development of low-temperature solid oxide fuel cells(LT-SOFCs)is of significant importance for realizing the widespread application of *** has stimulated a substantial materials research effort in developing high oxide-ion conductivity in the electrolyte layer of *** this context,for the first time,a dielectric material,CaCu_(3)Ti_(4)O_(12)(CCTO)is designed for LT-SOFCs electrolyte application in this *** individual CCTO and its heterostructure materials with a p-type Ni_(0.8)Co_(0.15)Al_(0.05)LiO_(2−δ)(NCAL)semiconductor are evaluated as alternative electrolytes in LT-SOFC at 450–550℃.The single cell with the individual CCTO electrolyte exhibits a power output of approximately 263 mW cm^(-2) and an open-circuit voltage(OCV)of 0.95 V at 550℃,while the cell with the CCTO–NCAL heterostructure electrolyte capably delivers an improved power output of approximately 605 mW cm^(-2) along with a higher OCV over 1.0 V,which indicates the introduction of high hole-conducting NCAL into the CCTO could enhance the cell performance rather than inducing any potential short-circuiting *** is found that these promising outcomes are due to the interplay of the dielectric material,its structure,and overall properties that led to improve electrochemical mechanism in CCTO–***,density functional theory calculations provide the detailed information about the electronic and structural properties of the CCTO and NCAL and their heterostructure CCTO–*** study thus provides a new approach for developing new advanced electrolytes for LT-SOFCs.

关键词： LT-SOFCs Dielectric CaCu_(3)Ti_(4)O_(12) Semiconductor Ni_(0.8)Co_(0.15)Al_(0.05)LiO_(2−δ) Ionic conductivity Heterostructure electrolyte

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Series Solution for Rotating Flow of an Upper Convected Maxwell Fluid over a Stretching Sheet

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Communications in Theoretical Physics 2011年第10期56卷 740-744页

作者： M.sajid Z.iqbal T.Hayat S.Obaidat Theoretical Plasma Physics Division PINSTECHP.O.Nilore Islamabad 44000Pakistan Department of Mathematics Quaid-i-Azam University 45320 Islamabad 44000Pakistan Department of Mathematics College of ScienceKing Saud UniversityP.O.Box.2455Riyadh 11451Saudi Arabia

The equations for two-dimensional flow of an upper convected Maxwell （UCM） fluid in a rotating frame are modeled. The resulting equations are first simplified by a boundary layer approach and then solved by a homotopy analysis method （HAM）. Convergence of series solution is discussed through residual error curves. The results of the influence of viscoelastic and rotation parameters are plotted and discussed.

关键词： rotating flow stretching sheet UCM fluid HAM solution residual error

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Prevalence of multi-drug resistant uropathogenic Escherichia coli in Potohar region of Pakistan

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Asian Pacific Journal of Tropical Biomedicine 2016年第1期6卷 60-66页

作者： Ihsan Ali Zara Rafaque Safia Ahmed sajid Malik Javid iqbal Dasti Department of Microbiology Qauid-i-Azam University Department of Animal Sciences Qauid-i-Azam University

Objective:To scrutinize patterns of multi-drug-resistant uropathogenic Escherichia coli(UPEC) strains and particularly of fluoroquinolone-resistance this is an alternative choice for the treatment of urinary tract ***:Bacterial samples(n = 250) were collected from out-patients from August 2012 to August 2014 *** susceptibility profiling and determination of minimum inhibitory concentrations(MICs) and minimum bactericidal concentrations were performed according to the guidelines of Clinical and Laboratory Standards Institute(CLSI,2012).Genes,qnrA,qnrB and qnrS were identified by DNA amplification and ***:The highest percentage of UPEC isolates were resistant to co-trimoxazole(82%) followed by cephalothin(80%),2nd Gen,3rd Gen and 4th Gen cephalosporins,*** against gentamicin,amikacin remained 29% and 4%.For other drugs including nitrofurantoin,tetracycline,carbapenem and beta-lactam inhibitors remained below 10%.Altogether,59% of the isolates were resistant to at least three antibiotics including one ***,MICs for ciprofloxacin remained(MIC≥256 μg/mL) and for levofloxacin(MIC≥16 μg/mL and 32 μg/mL).No significant differences were observed regarding MIC values of extended spectrumβ-lactamase(ESBL) and non-ESBL *** qnrS and qnrB positive isolates MICs remained above 32 μg/*** of UPEC was significantly higher among females and 40% of the isolates were ESBL ***:Higher percentages of ESBL producing UPEC were associated with urinary tract ***,the majority of these isolates were multi-drug resistant and fluoroquinolone-resistant.

关键词： Fluoroquinolone-resistant Uropathogenic E.coli Multi-drug resistant Extended spectrum beta-lactamase

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