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Stability Analysis of Predator-Prey System with Consuming Resource and Disease in Predator Species

Computer Modeling in Engineering & Sciences 2022年第8期132卷 489-506页

作者： Asad Ejaz yasir Nawaz Muhammad Shoaib Arif Daoud S.Mashat Kamaleldin Abodayeh Department of Mathematics Air UniversityPAF Complex E-9Islamabad44000Pakistan Department of Mathematics King Abdulaziz UniversityJeddah22254Saudi Arabia Department of Mathematics and Sciences College of Humanities and SciencesPrince Sultan UniversityRiyadh11586Saudi Arabia

The present study is concerned with formulating a predator-prey eco-epidemiological mathematical model assuming that an infection exists in the predator *** two classes of predator species(susceptible and infected)compete for the same sources available in the environment with the predation *** is assumed that the disease does not spread *** proposed model is analyzed for the stability of the coexistence of the predators and *** fixed points are carried out,and the coexisting fixed point is studied in detail by constructing the Lyapunov *** movement of species in search of food or protection in their habitat has a significant influence,examined through *** ecological influences of self-diffusion on the population density of both species are *** is theoretically proved that all the under consideration species can coexist in the same *** coexistence fixed point is discussed for both diffusive and non-diffusive ***,a numerical scheme is constructed for solving time-dependent partial differential *** stability of the scheme is given,and it is applied for solving presently modified eco-epidemiological mathematical model with and without *** comparison of the constructed scheme with two exiting schemes,Backward in Time and Central in Space(BTCS)and Crank Nicolson,is also given in the form of ***,we run a computer simulation to determine the effectiveness of the proposed numerical *** readers’convenience,a computational code for the proposed discrete model scheme may be made available upon request.

关键词： Eco-epidemiology self-diffusion stability Lyapunov function proposed numerical scheme

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Kappaphycus alvarezii waste biomass:A potential biosorbent for chromium ions removal

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Journal of Environmental Sciences 2011年第6期23卷 918-922页

作者： Oon Lee Kang Nazaruddin Ramli Mamot Said Musa Ahmad Suhaimi Md yasir Arbakariya Ariff School of Chemical Sciences and Food Technology Faculty of Science and TechnologyUniversiti Kebangsaan Malaysia43600 BangiSelangorMalaysia School of Sciences and Technology Universiti Malaysia Sabah88400 Kota KinabaluSabahMalaysia Faculty of Biotechnology and Biomolecular Science Universiti Putra Malaysia43400 SerdangSelangorMalaysia

The Cr（III） sorption experiments onto Kappaphycus alvarezii waste biomass were conducted at different pH values（2-6） under the conditions of initial metal concentration of 10-50 mg/L and the chemical compositions of Cr-Cu and *** Cr（III） sorption capacities were slightly dependent on pH,and the maximum sorption capacity was 0.86 mg/g at pH *** sorption capacities increased with increase in the initial metal concentration,whereas it was suppressed by the presence of Cu（II） and Cd（III） in the *** Cr（III） sorption equilibrium was evaluated using Langmuir,Freundlich and BET *** sorption mechanisms were characterised using scanning electron microscopy and Fourier transform infrared *** main mechanisms were ion exchange coupled with a complexation *** alvarezii waste biomass represents a potential for Cr（III） ion removal from aqueous solution.

关键词： biosorption chromium Kappaphycus alvarezii

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The convergence ball and error analysis of the two-step Secant method

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Applied Mathematics(A Journal of Chinese Universities) 2017年第4期32卷 397-406页

作者： LIN Rong-fei WU Qing-biao CHEN Min-hong KHAN yasir LIU Lu Department of Mathematics Taizhou University Department of Mathematics Zhejiang University Department of Mathematics Zhejiang Sci-Tech University

Under the assumption that the nonlinear operator has Lipschitz continuous divided differences for the first order,we obtain an estimate of the radius of the convergence ball for the two-step secant ***,we also provide an error estimate that matches the convergence order of the two-step secant *** last,we give an application of the proposed theorem.

关键词： two-step secant method estimate of radius convergence ball Lipschitz continuous

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Incidence and clinical presentation of portal vein thrombosis in cirrhotic patients

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Hepatobiliary & Pancreatic Diseases International 2016年第5期15卷 499-503页

作者： yasir Furkan Cagin Yahya Atayan Mehmet Ali Erdogan Firat Dagtekin Cemil Colak Division of Gastroenterology Medical Faculty Inonu University Malatya 44280 Turkey Division of Internal Medicine Medical Faculty Inonu University Malatya 44280 Turkey Division of Biostatistics and Medical Informatics Colak C Medical Faculty Inonu University Malatya 44280 Turkey

BACKGROUND: Portal vein thrombosis (PVT) is due to many risk factors, but its pathogenesis is still not clearly understood. To identify the risk factors for PVT, we analyzed the clinical characteristics and complications associated with PVT in cir-rhotic patients. METHODS: We studied patients with liver cirrhosis who were admitted to our unit from April 2009 to December 2014. The patients were divided into the PVT and non-PVT groups, and were compared by variables including gender, age, the etiology of cirrhosis, stage of cirrhosis, complications, imaging, and treatment. RESULTS: PVT was found in 45 (9.8%) of 461 cirrhotic pa-tients admitted to our hospital. Most patients (45.9%) had hepatitis B virus (HBV)-related cirrhosis, with a similar dis-tribution of etiologies between the groups. However, there was no positive relationship between PVT and etiologies of cirrhosis. Most patients (71.5%) were in the stage of hepatic decompensation. No statistically signiifcant differences were found in complications including esophageal varices, ascites, and hepatic encephalopathy between the groups. However, there was a signiifcant positive correlation between hepatocel-lular carcinoma (HCC) and PVT (P CONCLUSIONS: The incidence of PVT was 9.8%, mainly in patients with HBV-related cirrhosis. The development of PVT was associated with the severity of liver disease and HCC.

关键词： portal vein thrombosis cirrhosis clinical presentation

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Robotic surgery and liver transplantation:A single-center experience of 501 robotic donor hepatectomies

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Hepatobiliary & Pancreatic Diseases International 2022年第4期21卷 334-339页

作者： Maren Schulze Yasser Elsheikh Markus Ulrich Boehnert yasir Alnemary Saleh Alabbad Dieter Clemens Broering Organ Transplant Center of Excellence King Faisal Specialist Hospital&Research CentreP.O.Box 3354Riyadh 11211Saudi Arabia

Background:Over the past two decades robotic surgery has been introduced to many areas including liver *** liver surgery is an alternative minimally invasive ***,moving on to the complexity of living donor hepatectomies,the advantages of robotic versus laparoscopic approach have convinced us to establish the robotic platform as a standard for living donor ***:From November 2018 to January 2022,501 fully robotic donor hepatectomies,including 177 left lateral donor lobes,112 full left lobes and 212 full right lobes were *** were donated to 296 adult recipients and 205 pediatric *** age,sex,body weight,body mass index(BMI),graft weight,graft to body weight ratio(GBWR),operative time,blood loss,first warm ischemic time,pain score,length of intensive care unit(ICU)stay and hospital stay,and complications were retrospectively analyzed based on a prospectively kept *** were evaluated for graft and patient survival,age,sex,BMI,body weight,model of end-stage liver disease score,blood loss,transfusions,operative time,cold ischemic time,length of hospital stay and ***:There was no donor *** cases needed to be converted to open *** median blood loss was 60 mL(range 20-800),median donor operative time was 6.77 h(range 2.93-11.53),median length of hospital stay was 4 days(range 2-22).Complication rate in donors classified following ClavienDindo was 6.4%(n=32)with one grade Ⅲ ***-year actual recipient overall survival was 91.4%;87.5% for adult recipients and 97.1% for pediatric ***-year actual graft overall survival was 90.6%;87.5% for adult recipients and 95.1% for pediatric ***-hospital mortality was 6%,9.1%(27/296)for adult recipients and 1.4%(3/205)for pediatric *** recipients’morbidity was 19.8%(n=99).Twenty-eight recipients(5.6%)had biliary and 22(4.4%)vascular ***(12.0%)recipients needed to

关键词： Living liver donor Innovation Robotic donor surgery Donor safety Minimally invasive donor surgery

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CLASSIFICATION OF CUBIC PARAMETERIZED HOMOGENEOUS VECTOR FIELDS

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Journal of Systems Science & Complexity 2002年第2期15卷 125-138页

作者： Kamal H yasir Tang Yun Department of Mathematical Science Tsinghua University 北京 100084

Abstract. In this paper the cubic homogeneous parameterized vector fields aJre *** classification of the phase portrait near the critical point is presented. This classifica- tion is an extension of the result given b... 详细信息

关键词： Classification Cubic vector fields.

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Ultra-Low Power 1 Volt Small Size 2.4 GHz CMOS RF Transceiver Design for Wireless Sensor Node

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Journal of Beijing Institute of Technology 2018年第4期27卷 584-591页

作者： Muhammad yasir Faheem Shun'an Zhong Abid Ali Minhas Muhammad Basit Azeem School of Information and Electronics Beijing Institute of TechnologyBeijing College of Computer and Information Systems Al Yamamah University Department of Mechatronics Engineering University of Engineering and Technology

Ultra-low power transceiver design is proposed for wireless sensor node used in the wireless sensor network（WSN）.Typically,each sensor node contains a transceiver so it is required that both hardware and software designs of WSN node must take care of energy consumption during all modes of operation including active/sleep modes so that the operational life of each node can be increased in order to increase the lifetime of *** current declared size of the wireless sensor node is of millimeter order,excluding the power source and crystal *** have proposed a new 2.4 GHz transceiver that has five blocks namely XO,PLL,PA,LNA and *** proposed transceiver incorporates less number of low-drop outs（LDOs）*** size of the transceiver is reduced by decreasing the area of beneficiary components up to 0.41 mm;of core area in such a way that some functions are optimally distributed among other *** proposed design is smaller in size and consumes less power,<1 mW,compared to other *** operating voltage has also been reduced to 1 *** transceiver is most efficient and will be fruitful for the wireless networks as it has been designed by considering modern requirements.

关键词： low-drop outs(LDOs) transceiver metal oxide semiconductor field effect transistor(MOSFET) wireless sensor networks(WSN)

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Numerical Study for Magnetohydrodynamic(MHD)Unsteady Maxwell Nanofluid Flow Impinging on Heated Stretching Sheet

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Computer Modeling in Engineering & Sciences 2022年第11期133卷 303-325页

作者： Muhammad Shoaib Arif Muhammad Jhangir yasir Nawaz Imran Abbas Kamaleldin Abodayeh Asad Ejaz Department of Mathematics and Sciences College of Humanities and SciencesPrince Sultan UniversityRiyadh11586Saudi Arabia Department of Mathematics Air UniversityIslamabad44000Pakistan

The numerous applications of Maxwell Nanofluid Stagnation Point Flow,such as those in production industries,the processing of polymers,compression,power generation,lubrication systems,food manufacturing and air conditioning,among other applications,require further research into the effects of various parameters on flow *** this paper,a study has been carried out for the heat andmass transfer of Maxwell nanofluid flow over the heated stretching sheet.A mathematical model with constitutive expressions is constructed in partial differential equations(PDEs)through obligatory basic conservation laws.A series of transformations are then used to take the system into an ordinary differential equation(ODE).The boundary conditions(BCs)are also treated similarly for transforming into first-order ordinary differential equations(ODEs).Then these ODEs are computed by using the Shooting *** effect of factors on the skin friction coefficient,the local Nusselt number,and the local Sherwood number are explored,and the results are displayed *** obtained results demonstrate that by increasing the values of the Maxwell and slip velocity parameters,velocity *** investigators tasked with addressing unresolved difficulties in the realm of enclosures used in industry and engineering,we thought this work would serve as a guide.

关键词： Maxwell fluid stagnation point flow heat and mass transfer thermal radiations shooting method

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The Role of Deep Learning in Parking Space Identification and Prediction Systems

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计算机、材料和连续体（英文） 2023年第4期75卷 761-784页

作者： Faizan Rasheed yasir Saleem Kok-Lim Alvin Yau Yung-Wey Chong Sye Loong Keoh School of Physics Engineering and Computer ScienceUniversity of HertfordshireHatfieldAL109ABUK Department of Computer Science Aberystwyth UniversityAberystwyth SY233FLUK Lee Kong Chian Faculty of Engineering and Science Universiti Tunku Abdul RahmanKajang43200SelangorMalaysia National Advanced IPv6 Centre(NAv6) Universiti Sains MalaysiaPenang11800Malaysia School of Computing Science University of Glasgow Singapore737729Singapore

In today’s smart city transportation,traffic congestion is a vexing issue,and vehicles seeking parking spaces have been identified as one of the causes leading to approximately 40%of traffic *** parking spaces alone is insufficient because an identified available parking space may have been taken by another vehicle when it arrives,resulting in the driver’s frustration and aggravating traffic jams while searching for another parking *** explains the need to predict the availability of parking ***,deep learning(DL)has been shown to facilitate drivers to find parking spaces efficiently,leading to a promising performance enhancement in parking identification and prediction ***,no work reviews DL approaches applied to solve parking identification and prediction *** by this gap,the purpose of this work is to investigate,highlight,and report on recent advances inDLapproaches applied to predict and identify the availability of parking *** of DL-based parking identification and prediction systems is established as a methodology by classifying and categorizing existing literature,and by doing so,the salient and supportive features of different DL techniques for providing parking solutions are ***,several open research challenges are *** work identifies that there are various DL architectures,datasets,and performance measures used to address parking identification and prediction ***,there are some open-source implementations available that can be used directly either to extend existing works or explore a new *** is the first short survey article that focuses on the use of DL-based techniques in parking identification and prediction systems for smart *** study concludes that although the deployment of DL in parking identification and prediction systems provides various benefits,the convergence of these two types of systems and DL brings about new i

关键词： Convolutional neural network deep learning neural networks parking identification parking prediction smart city

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Microstructure and Mechanical Properties of Fe-based Amorphous Composite Coatings Reinforced by Stainless Steel Powders

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Journal of Materials Science & Technology 2015年第1期31卷 43-47页

作者： H.Zhou C.Zhang W.Wang M.yasir L.Liu School of Materials Science and Engineering State Key Lab for Materials Processing and Die &Mould TechnologyHuazhong University of Science and Technology Huazhong University of Science and Technology Research Institute in Shenzhen

In this study,a few Fe-based amorphous matrix composite coatings reinforced with various portions(4,8 and16 vol.%) of 31 6L stainless steel powders have been successfully produced through high velocity oxy-fuel(HVOF) *** microstructure of the composite coatings was systematically characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM) and transmission electron microscopy(TEM).The main structure of composite coatings remained amorphous while 31 6L stainless steel splats were distributed homogeneously in the amorphous matrix and well connected with surrounding amorphous *** strength of coatings to the substrate was determined by 'pull-off' tensile *** results revealed that the31 6L stainless steel phase effectively improved the bonding strength of amorphous coatings,which is mainly contributed by the strong metallurgical bonding between stainless steel and amorphous *** addition of31 6L stainless steel also enhanced the ductility and fracture resistance of the coatings due to the ductile stainless steel phases,which can arrest crack propagation and increase energy dissipation.

关键词： Thermal spraying Fe-based amorphous coating Stainl

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