检索结果-南通市图书馆

Weighted-adaptive Inertia Strategy for Multi-objective Scheduling in Multi-clouds

在线全文

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2022年第7期72卷 1529-1560页

作者： Mazen Farid Rohaya Latip Masnida Hussin Nor Asilah Wati Abdul hamid Department of Communication Technology and Networks Universiti Putra Malaysia(UPM)Serdang43400Malaysia Institute for Mathematical Research(INSPEM) Universiti Putra Malaysia(UPM)Serdang43400Malaysia Faculty of Education-Saber University of AdenAden2408Yemen

One of the fundamental problems associated with scheduling workflows on virtual machines in a multi-cloud environment is how to find a near-optimum *** workflow scheduling involves assigning independent computational jobs with conflicting objectives to a set of virtual *** optimization methods for solving non-deterministic polynomial-time hardness(NP-hard)problems deploy multi-objective *** such,Pareto dominance is one of the most efficient criteria for determining the best solutions within the Pareto ***,the main drawback of this method is that it requires a reasonably long time to provide an optimum *** this paper,a new multi-objective minimum weight algorithm is used to derive the Pareto *** conflicting objectives considered are reliability,cost,resource utilization,risk probability and *** multi-objective algorithms select a number of permutations with an optimal trade-off between conflicting objectives,we propose a new decisionmaking approach named the minimum weight optimization(MWO).MWO produces alternative weight to determine the inertia weight by using an adaptive strategy to provide an appropriate alternative for all optimal *** way,consumers’needs and service providers’interests are taken into *** standard scientific workflows with conflicting objectives,we compare our proposed multi-objective scheduling algorithm using minimum weigh optimization(MOS-MWO)with multi-objective scheduling algorithm(MOS).Results show that MOS-MWO outperforms MOS in term of QoS satisfaction rate.

关键词： Multi-cloud environment multi-objective optimization Pareto optimization workflow scheduling

Developing Engagement in the Learning Management System Supported by Learning Analytics

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computer Systems Science & Engineering 2022年第7期42卷 335-350页

作者： Suraya hamid Shahrul Nizam Ismail Muzaffar Hamzah Asad W.Malik Department of Information System Faculty of Computer Science and Information TechnologyUniversiti MalayaKuala LumpurMalaysia Faculty of Computing and Informatics Universiti Malaysia SabahSabahMalaysia Department of Computing School of Electrical Engineering and Computer Science(SEECS)National University of Sciences and Technology(NUST)IslamabadPakistan

Learning analytics is an emerging technique of analysing student par-ticipation and *** recent COVID-19 pandemic has signiﬁcantly increased the role of learning management systems(LMSs).LMSs previously only complemented face-to-face teaching,something which has not been possible between 2019 to *** date,the existing body of literature on LMSs has not analysed learning in the context of the pandemic,where an LMS serves as the only interface between students and ***,productive results will remain elusive if the key factors that contribute towards engaging students in learning are notﬁrst identiﬁ***,this study aimed to perform an exten-sive literature review with which to design and develop a student engagement model for holistic involvement in an *** required data was collected from an LMS that is currently utilised by a local Malaysian *** model was validated by a panel of experts as well as discussions with *** is our hope that the result of this study will help other institutions of higher learning determine factors of low engagement in their respective LMSs.

关键词： Engagement analysis learning analytics learning management system student engagement

Optimization techniques in deep convolutional neuronal networks applied to olive diseases classification

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Artificial Intelligence in Agriculture 2022年第1期6卷 77-89页

作者： El Mehdi Raouhi Mohamed Lachgar a hamid Hrimech Ali Kartit LTI Laboratory ENSAChouaib Doukkali University of El JadidaEl JadidaMorocco LAMSAD Laboratory ENSAHassan First UniversityBerrechidMorocco

Plants diseases have a detrimental effect on the quality but also on the quantity of agricultural ***,the prediction of these diseases is proving the effect on crop quality and on reducing the risk of production ***,the detection of plant diseases-either with a naked eye or using traditional methods-is largely a cumbersome process in terms of time,availability and results with a high-risk *** present work introduces a depth study of various CNN architectures with different optimization algorithms carried out for olive disease detection using classification techniques that recommend the best model for constructing an effective disease *** study presents a dataset of 5571 olive leaf images collected manually on real conditions from different regions of Morocco,that also includes healthy class to detect olive ***,one of the goals of this research was to study the correlation effects between CNN architectures and optimization algorithms evaluated by the accuracy and other performance *** highest rate in trained models was 100%,while the highest rate in experiments without data augmentation was 92,59%.Another subject of this study is the influence of the optimization algorithms on neuronal network *** a result of the experiments carried out,the MobileNet architecture using Rmsprop algorithms outperformed the others combinations in terms of performance and efficiency of disease detector.

关键词： Convolutional neuronal networks(CNN) Classification Optimization Gradient descent Plant diseases Olive dataset diseases(ODD)

Breeding Enrichment of Genetic Variation of Grain Yield and Its Attributes in Bread Wheat under Drought Stress and Well Irrigation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Phyton-International Journal of Experimental Botany 2022年第12期91卷 2699-2717页

作者： Dina Swelam Abdel hamid Salem Manal Hassan Mohammed Ali Wheat Research Department Agricultural Research CenterGiza12619Egypt Agronomy Department Faculty of AgricultureZagazig UniversityZagazig44519Egypt

Drought stress(DS)is one of the most critical environmental abiotic stresses for wheat production in the arid *** of high-yielding genotypes tolerant to DS can play a significant role in mitigation the negative impacts associated with *** the present study,generation means analysis(GMA)was used to study the performance of two crosses under well irrigation(WI)and deficit irrigation[cross I(Line 44×Shandweel-1)and cross II(Line 20×Sakha 93)].Significant differences were observed for days to heading(DH),days to maturity(DM),plant height(PH),spike length(SL),number of spikes per plant(NS/P),number of grains per spike(NG/S),thousand-grain weight(TGW),grain yield per plant(GY/P),and proline content(PC)in the six populations of the two crosses within each irrigation *** II had early maturity and the highest PC,NS/P,TGW,and GY/P regardless of the irrigation *** I showed positive significant relative heterosis and heterobeltiosis for GY/P under the two irrigation *** inheritance of characters of cross I revealed additive,dominant,and epistatic effects,which varied with trait and *** genetic effects predominated in DH,SL,and PC,while non-additive were found in DM,NS/P,NG/S,and GY/***-sense heritability estimates(h^(2) n)were high for DH and PC,moderate to high for PH and SL,moderate for DM,NG/S,NS/P,and TGW,and low for GY/*** on different drought indices the populations BC_(1),BC_(2),F_(1),and P1 of cross II and BC1 of cross I were more tolerant to drought ***,PC,TGW and DH can be used as selection indicators to improve wheat for drought tolerance in early generations and other yield components traits in late *** second cross(Line 20×Sakha 93)shows promise and is of interest to a drought tolerance breeding program,where wheat breeders can use recombinant breeding strategies to construct desirable drought stress *** and path coefficient revealed that TGW and PC were the main

关键词： Drought generation mean analysis heterosis heritability wheat

Electromagnetic field exposure as a plausible approach to enhance the proliferation and differentiation of mesenchymal stem cells in clinically relevant scenarios

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2022年第1期23卷 42-57页

作者： Haslinda Abdul hamid Vahid Hosseinpour SARMADI Vivek PRASAD Rajesh RAMASAMY Azizi MISKON Bio-artificial Organ and Regenerative Medicine Unit National Defense University of MalaysiaKuala Lumpur57000Malaysia Cellular and Molecular Research Centre Iran University of Medical SciencesTehran***Iran Institutes of Regenerative Medicine Iran University of Medical SciencesTehran***Iran Stem Cell and Immunity Research Group Immunology LaboratoryDepartment of PathologyFaculty of Medicine and Health SciencesUniversiti Putra Malaysia(UPM)Seri KembanganSelangor43400Malaysia

Mesenchymal stem/stromal cell(MSC)-based therapy has been regarded as one of the most revolutionary breakthroughs in the history of modern medicine owing to its myriad of immunoregulatory and regenerative *** the rapid progress in the fields of osteo-and musculoskeletal therapies,the demand for MSC-based treatment modalities is becoming increasingly *** this endeavor,researchers around the world have devised new and innovative techniques to support the proliferation of MSCs while minimizing the loss of hallmark features of stem *** such example is electromagnetic field(EMF)exposure,which is an alternative approach with promising *** this review,we present a critical discourse on the efficiency,practicability,and limitations of some of the relevant methods,with insurmountable evidence backing the implementation of EMF as a feasible strategy for the clinically relevant expansion of MSCs.

关键词： Electromagnetic field Proliferation Mesenchymal stem cell Therapy

Characterization and corrosion behavior of Al-Co-rare earth(Ce-La)amorphous alloy

在线全文

学校读者我要写书评

暂无评论

Journal of Rare Earths 2023年第5期41卷 771-779,I0006页

作者： Seyed Ali Mousavi Sayed hamid Hashemi Ali Ashrafi Reza Shoja Razavi Seyyed Mehdi Ghazi Mirsaeed Faculty of Materials and Manufacturing Technologies Malek Ashtar University of TechnologyTehran167885611Iran Department of Materials Engineering Malek Ashtar University of TechnologyIsfahanShahin-shahrIran Department of Materials Engineering Isfahan University of TechnologyIsfahan***Iran

A new Al-based amorphous alloy with excellent corrosion resistance and high thermal stability was produced in the Al-Co-RE(Ce-La)*** this regard,two different amorphous-nanocrystalline ribbons:Al_(87.6)-Co_(6.4)-Ce_(3.8-)La_(2.2)(M_(1))and Al_(82.3)-Co_(10.1)-Ce_(4.8)-La_(2.8)(M_(2))were prepared using melt *** results reveal the supercooled liquid region(ATx)of 218℃which shows that the M2alloy has higher thermal stability in comparison to the *** M2ribbons present the superior corrosion resistance because of the formation of amorphous *** icorr,Ecorr,Epit,and Epit-Ecorrvalues of fully amorphous Al-Co-Ce-La metallic ribbons have a better trend of anti-corrosion performance compared to other crystalline and amorphous aluminum alloys.

关键词： Amorphous alloys Melt-spinning Rare earth metal Corrosion behavior

Numerical Investigation of the Thermal Behavior of a System with a Partition Wall Incorporating a Phase Change Material

在线全文

学校读者我要写书评

暂无评论

Fluid Dynamics & Materials Processing 2023年第5期19卷 1227-1236页

作者： Nisrine Hanchi hamid Hamza Jawad Lahjomri Khalid Zniber Abdelaziz Oubarra Faculty of Sciences Ain Chock Laboratory of MechanicsHassan II University of CasablancaCasablancaMorocco

The work deals with the thermal behavior of a conventional partition wall incorporating a phase change material(PCM).The wall separates two environments with different thermal *** first one is conditioned,while the adjacent space is characterized by a temperature that changes sinusoidally in *** effect of the PCM is assessed through a comparative analysis of the cases with and without *** performances are evaluated in terms of dimensionless energy stored within the wall,comfort temperature and variations of these quantities as a function of the amount of PCM and its emplacement.

关键词： Phase change materials rangemelting temperature composite wall comfort temperature dimensionless energy stored

Uncommon post-infarction pseudoaneurysms:A case report

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Cardiology 2022年第4期14卷 260-265页

作者： hamid Jallal Soufiane Belabes Ali Khatouri Department of Cardiology Military Hospital of Instruction Omar Bongo OndimbaLibreville 204040Gabon Department of Radiology Military Hospital of Instruction Omar Bongo OndimbaLibreville 20404Gabon Department of Cardiology Military Hospital AvicenneUniversity Cadi AyyadMarrakech 40000Morocco

BACKGROUND Mechanical complications are a rare presentation in chronic coronary syndromes,which have significantly decreased in the primary coronary intervention *** rupture may occur,resulting in pseudoaneurysms(PANs).Early reperfusion decreases the risk of this *** is the method of choice for *** SUMMARY A 54-year-old female hypertensive patient,with a history of non-revascularized inferior and anterior ST-segment elevation myocardial infarction(MI)4 years prior,was admitted to the cardiac unit of the hospital with complaints of abdominal pain and dyspnea lasting 2 *** patient was hemodynamically stable,and 12-lead electrocardiogram showed persistent ST elevation and Q wave in the inferior and apical *** echocardiogram in the twochamber view showed a narrow neck of a wide PAN in the distal apical left ventricular inferior *** addition,the apical four-chamber and subcostal views revealed a second bulky PAN of the apical wall separated from the first by a common organizing *** magnetic resonance imaging confirmed the coexistence of more than one *** patient received conservative medical treatment,and surgery was scheduled for outside the *** patient had worsening multiple organ failure and died 4 wk after *** Multifocal PANs rarely occur in chronic *** should be paid to patients with pain and cardiovascular risk factors.

关键词： Cardiac rupture Myocardial infarction Pseudoaneurysm Echocardiogram Case report

Bridging the microstructural evolutions from slurry to porous electrode of a lithium-ion battery

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2023年第9期84卷 329-334页

作者： hamid Hamed Zoleikha Mirzaie Alamooti Ashutosh Agrawal Jan D'Haen An Hardy Mohammadhosein Safari Institute for Materials Research(IMO-imomec) UHasseltMartelarenlaan 42B-3500 HasseltBelgium Energyville Thor Park 8320B-3600 GenkBelgium IMEC Division IMOMEC BE-3590Belgium

1. Introduction The porous electrodes are the crucial components of the modern electrochemical devices including lithium-ion batteries. The detailed configuration of the lithium-insertion, carbon black, and PVDF binder particles in a typical electrode of a lithium-ion cell has a significant impact on its energy and power density. A thinner electrode is desired to decrease the battery volume particularly for portable electronics and mobility applications.

关键词： density. lithium electrode