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Characterization and Influence of Nanofiber Flours of Wood Modified on Fresh State Properties of Cement Based Mortars

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Journal of Renewable Materials 2019年第6期7卷 557-566页

作者： fadhel aloulou Sabrine Alila LabEM-LR11ES34:Laboratory of Energy and Materials University of SousseTunisia Laboratoire Sciences des Matériaux et Environneme nt University of SfaxTunisia

Nanofibrillated wood fiber was used as fillers in the partial cement matrix replacing the cement to a content of up to 2%by weight of *** nanofibrillated effect of wood fibers on porosity,thermal properties and compressive strength was *** results obtained showed an improvement in compressive strength of more than 40%with 1%by weight of wood fiber *** addition of nanofibrillated wood fiber shows a good pore reduction,and the best result was obtained with emulsion of a mixture incorporating 1%by weight of wood fiber nanofibrillate in the presence of an anionic surfactant(SDBS).Thermal conductivity measurements and thermal expansion coefficient,compared to nanofibrillated wood fiber reinforced cement pastes,showed the reinforcing efficiency of cellulose fiber *** degree of hydration of the cement increased with nanofibrillated wood *** property has been confirmed by Fourier transform infrared *** analyzes revealed that the presence of nanofibrillated wood fibers generates and promotes the hydration of the cement,producing more portlandite and calcium silicate gel,which influences the compressive strength which gives a strong improvement.

关键词： Cement nano-fiber flour nano-fiber wood modified adjuvant surfactant emulsion

Influence and Dispersion of Nanofiber of Wood Modified on Properties of Cement Based Mortars

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Journal of Renewable Materials 2019年第7期7卷 631-641页

作者： fadhel aloulou Alila Sabrine Habib Sammouda LabEM-LR11ES34:Laboratory of Energy and Materials University of SousseTunisia LMSE:Laboratoire Sciences des Matériaux et Environnement University of SfaxTunisia

Wood nanofibers from industrial waste have been used as polymeric material to reinforce the cement paste to a content of up to 2%by weight of *** effect of the wood nanofibre content on the porosity,the compressive strength and the degree of hydration of the cement was *** results showed an improvement in compressive strength of over 50%with 1%of added *** modification of nanofiber wood by grafting alkyl chains to their surface can reduce the amount of water absorbed by the *** of an anionic additive(SDBS)to the mixing water improves the surface of the samples more and more by minimizing the pore size by emulsion effect,hence the water absorption *** degree of hydration of the cement increased with the cellulose content containing *** analysis revealed that the presence of nanofibers favored the hydration of the cement by producing more calcium silicate gel and portlandite,probably the main reason for this improvement in compressive strength.

关键词： Cement nano-fiber wood modified adjuvant,surfactant emulsion

Stabilization and Evaluation of Modified Nanofiber Flour Wood on the Properties of Cement-Baszd Mortar

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Journal of Renewable Materials 2019年第8期7卷 763-774页

作者： fadhel aloulou Sabrine Alila Habib Sammouda Laboratory of Energy and Materials(LabEM):LR11ES34 Higher School of Science and Technology of Hammam SousseUniversity of SousseSousseTunisia Laboratoire Sciences des Matériaux et Environnement:LMSE Facultédes Sciences de SfaxUniversity of SfaxSfaxTunisia

The influence of nanofiberwood on the properties of the fresh condition of cement based mortars is not known in detail,despite recent advances in nanocellulose technology and it is related composite *** wood from industrial waste,produced by high-pressure homogenization,was used as cement partial replacement for cement paste at a content ranging from 0%to 2%by weight of *** effect of the nanofiber wood content on the porosity,the compressive strength and the degree of hydration of the cement was *** have shown an improvement in the compressive strength by more than 50%with 1%of added fiber *** chemical modification of nanofibers wood by grafting of chains alkyls in their surfaces can reduce the quantity of water absorbed by the *** addition of an anionic additive(SDBS)in the water of mixing improves of more the surface of samples by minimizing the size of pores by emulsion effect,from where the absorption of water *** degree of hydration of the cement has increased with the cellulose content containing *** analyze revealed that the presence of nanofiber wood favored the hydration of the cement by producing more calcium silicate gel and portlandite,probably the main reason for this improvement in compressive strength.

关键词： Cement nano-fiber adjuvant surfactant emulsion hydratation thermal conductivity

Effects of Cationic Surfactant on Fresh and Hardened Properties of Cement-Based Mortar

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Journal of Renewable Materials 2023年第5期11卷 2345-2365页

作者： Soumaya Zormati fadhel aloulou Habib Sammouda Laboratory of Energy and Materials LabEM-LR11ES34University of SousseSousseTunisia

The objective of this study is to analyze the effects of using surfactant(CTAB)and cellulose nanofibers(NFC)as an admixture in cement *** examined composite properties as porosity,compression energy,thermal conductivity and *** results showed that with the addition of 0.7%by weight of NFC per emulsion in the presence of a cationic surfactant(CTAB).The new material produced presented a dry porosity between 4.7%and 4.4%,compressive strength between 9.8 and 22.9 MPa,and thermal conductivity between 0.95 and 2.25 W·m^(−1)·K^(−1).Thus we show better mechanical and thermal performance than that traditional Portland cement mortar with a density *** addition,the mortar made by emulsion of ordinary portland cement,cellulose nanofiber and organophilic clay(OC)treated with cetyltrimethylammonium bromide(CTAB)obtained has good resistance under high temperature and water,as well as excellent thermal insulation performance under high temperature and humidity *** study verified that the presence of NFC promotes hydration,leading to the production of more calcium silicate and portlandite gel.

关键词： Cement nanofiber cellulose organophile-clay thermal conductivity hydration surfactant compressive strength mortar

Multi-model deep learning approach for collaborative filtering recommendation system

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CAAI Transactions on Intelligence Technology 2020年第4期5卷 268-275页

作者： Mohammed fadhel Aljunid Manjaiah Doddaghatta Huchaiah Computer Science Mangalore UniversityMangaloreIndia

As a result of a huge volume of implicit feedback such as browsing and clicks,many researchers are involving in designing recommender systems(RSs)based on implicit *** implicit feedback is too challenging,it is highly applicable to use in building recommendation *** collaborative filtering techniques such as matrix decomposition,which consider user preferences as a linear combination of user and item latent features,have limited learning capacities,hence suffer from a cold start and data sparsity *** tackle these problems,the research direction towards considering the integration of conventional collaborative filtering with deep neural networks to maps user and item ***,the scalability and the sparsity of the data affect the performance of the methods and limit the worthiness of the results of the ***,the authors proposed a multimodel deep learning(MMDL)approach by integrating user and item functions to construct a hybrid RS and significant *** MMDL approach combines deep autoencoder with a one-dimensional convolution neural network model that learns user and item features to predict user *** detail experimentation on two real-world datasets,the proposed work exhibits substantial performance when compared to the existing methods.

关键词： filtering approach neural

An efficient hybrid recommendation model based on collaborative filtering recommender systems

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CAAI Transactions on Intelligence Technology 2021年第4期6卷 480-492页

作者： Mohammed fadhel Aljunid Manjaiah Doddaghatta Huchaiah Department of Computer Science Mangalore UniversityMangaloreIndia

In recent years,collaborative filtering(CF)techniques have become one of the most popularly used techniques for providing personalised services to *** techniques collect users9 previous information about items such as books,music,movies,ideas,and so ***-based models are generally referred to as similarity-based CF models,which are one of the most widely agreeable approaches for providing service *** memory-based approach includes user-based CF(UCF)and item-based CF(ICF)*** UCF model recommends items by finding similar users,while the ICF model recommends items by finding similar items based on the user-item rating ***,consequent to the ingrained sparsity of the user-item rating matrix,a large number of ratings are *** results in the availability of only a few ratings to make predictions for the unknown *** result is the poor prediction quality of the CF model.A model to find the best algorithm is provided here,which gives the most accurate recommendation based on different similarity *** a hybrid recommendation model,namely rUICF,is *** rUICF model integrates the UCF and ICF models with the T linear regression model to model the sparsity and scalability issue of the user-item rating *** experimentation on two different real-world datasets shows that the proposed model demonstrates substantial performance when compared with the existing methods.

关键词： services filtering similarity

A Genetic Algorithm to Minimize the Makespan in a Two-Machine Cross-Docking Flow Shop Problem

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Journal of the Operations Research Society of China 2020年第3期8卷 457-476页

作者： Imen Hamdi Mohamed fadhel Tekaya High Institute of Transport and Logistics University of SousseSousseTunisia MODILS lab Faculty of Economics and ManagementUniversity of SfaxSfaxTunisia

We consider the problem of two-machine cross-docking flow shop scheduling where each job on the second machine cannot be processed unless a job or a set of jobs have been completed on the first *** aim is to find a feasible schedule that minimizes the *** the problem is shown to be strongly NP-hard,we propose a genetic algorithm to solve small and large size *** test different types for each genetic operator where new ideas are introduced,which leads to propose six versions of the genetic *** then evaluate their effectiveness through an extensive computational experiments by using many instances generated randomly and by determining the percentage deviation from a lower bound from the literature.

关键词： Cross-docking Flow shop Scheduling Makespan Genetic algorithm

Radiolarian and Planktic Foraminifera Biostratigraphy of the Early Albian Organic Rich Beds of Fahdene Formation,Northern Tunisia

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Journal of Earth Science 2014年第1期25卷 45-63页

作者： M Ben fadhel T Zouaghi A Amri M Ben Youssef Département de Géologie Faculté des Sciences de Gafsa-Campus Universitaire Sidi Ahmed Zarrouk–2112 Département des Géoressources CERTE–Technopole de Borj Cédria

The lower part of Fahdene Formation outcropping in northeastern Tunisia is repre- sented by pelagic sequences and characterized by an important siliciclastic fraction that includes ra- diolarian and organic-rich beds of Allam Member. Litho-biostratigraphic analysis based on planktic foraminifera and radiolaria shows that deposition of organic-rich beds of Allam Member is confined to the Microhedbergella rischi Zone through the lower part of Ticinella primula Zone. Age diagnostic radiolaria recovered from these beds has been identified to constrain a direct age of black shale depo- sition. The assemblages can be correlated with the radiolarian biochronozone U.A.10-11 indicating an Early Albian to early Middle Albian in age. Radiolarian assemblages composed of species characteris- tic of U.A.10 biochronozone （A. montisserei, D. gracilis） are associated with radiolarian taxa belonging to Costata Zone （U.A.9 Pseudoeucyrtis hanni and Thanarla pseudodecora）, which can be correlated with Dercourt Member in the Ionian Zone and Paquier level of the Vocontian Basin （southeast of France）. Biostratigraphic and abundance curves analysis has demonstrated significant diversification of cryptocephalic Nassellaria and Archaeodictyomitrae, probably adapted to eutrophic conditions that characterized the Aptian-Albian transition. Ecological conditions may have governed the stratigraphic range of many cosmopolitan taxa （i.e., Pseudodictyomitrae lodogaensis） compared with stratigraphic distributions schemes reported from other domains. The timing of black shales deposition was dia- chronic due to local geodynamic conditions and upwelling currents distribution. The Allam black shales are correlative with the oceanic anoxic event OAElb which is characterized by the widespread of supraregionnally organic-rich beds in the Mediterranean Tethys basins across the Aptian-Albian transition.

关键词： northeastern Tunisia Albian Allam Member black shale radiolaria planktic foraminifera.

ENERGY-EFFICIENT MICROWAVE COMPONENTS FOR MOBILE COMMUNICATION

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China Communications 2017年第2期14卷 19-20页

作者： Yuanan Liu Quanyuan Feng fadhel M. Ghannouchi the electronic institute of china the school of information science and technology in southwest jiaotong university(swjtu) ChengduChina the institute of microelectronics of swjtu the electrical and computer engineering department schulich school of engineeringuniversity of calgaryCalgaryABCanada the intelligent rf radio laboratory(iradio lab) university of calgary royal society of canada the canadian academy of engineering-canadian academy of engineering the engineering institute of canada-engineering institute of canada ieee microwave theory and techniques society(ieee mtt-s)

In the coexisted world of 3G,4G,5G and many other specialized wireless communication systems,billions of connections could be existing for various information transmission ***,data show that the increase of network capacity is heavily more than the increase of the network energy efficiency in recent years,which could lead to more energy consumption per transmitted bit in the future *** basic units in mobile communication systems,microwave/RF components and modules play key roles

关键词： high data ENERGY-EFFICIENT MICROWAVE COMPONENTS FOR MOBILE COMMUNICATION PAPR show DPA