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Synthesized graphene oxide and fumed aerosil 380 dispersion stability and characterization with partially hydrolyzed polyacrylamide

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Chinese Journal of Chemical Engineering 2021年第6期34卷 307-322页

作者： Najeebullah Lashari tarek Ganat Department of Petroleum Engineering Universiti Teknologi PETRONAS32610 Seri IskandarPerak Darul RidzuanMalaysia Department of Petroleum and Gas Engineering Dawood University of Engineering&TechnologyM.A Jinnah RoadKarachi 74800Pakistan

Hydrolyzed polyacrylamide(HPAM)is a commonly used polymer for the chemicals,mining and refining processes of hydrocarbon but suffers from a persistent high-temperature instability *** contrast,the nanoparticle suspension remains a technical challenge because of the strong interactions of van der Waal forces within nanoparticles,which always encourage *** research sought to improve nanoparticles(NP)stability and polymer(HPAM)rheological properties to improved hydrocarbon recovery by utilizing synthesized graphene oxide(GO)nanosheets and fumed Aerosil 380 Silica oxide(SiO_(2)).The aqueous nanocomposites based on HPAM-GO and HPAM-SiO_(2) in aqueous polymeric solutions have been developed,and its viscoelastic and static behaviour is *** results imply that by adding fumed silica NP,the viscoelastic behaviour of HPAM is marginally improved,particularly in high temperatures and salinity,however,the inclusion of GO's significantly improves the viscosity and stability of the base polymer fluid at high *** Fourier data for the transformation of the infrared spectrum confirmed that the hydrogen bonding formed between HPAM carbonyl groups and silica NP surface silanol functionality and covalent interlinking of electrostatic h-bonding between HPAM and functional GO contributed to the improved stabilization and improved rheological performance that helps to recover high salinity and temperature hydrocarbons.

关键词： Aggregation Composites Chemical enhance oil recovery Hydrocarbons Nanoparticles Polymer

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Emerging applications of nanomaterials in chemical enhanced oil recovery:Progress and perspective

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Chinese Journal of Chemical Engineering 2020年第8期28卷 1995-2009页

In enhanced oil recovery,different chemicalmethods utilization improves hydrocarbon recovery due to their fascinating abilities to alter some critical parameters in porous media,such as mobility control,the interaction between fluid to fluid,and fluid to rock *** decades the use of surfactant and polymer flooding has been used as tertiary recovery *** the current research,the inclusion of nanomaterials in enhanced oil recovery injection fluids solely or in the presence of other chemicals has got colossal *** emphasis of this review is on the applicability of nanofluids in the chemical enhanced oil *** responsiblemechanisms are an increment in the viscosity of injection fluid,decrement in oil viscosity,reduction in interfacial and surface tension,and alteration of wettability in the rock *** this review,important parameters are presented,which may affect the desired behavior of nanoparticles,and the drawbacks of nanofluid and polymer flooding and the need for a combination of nanoparticles with the polymer are *** to the lack of literature in defining the mechanism of nanofluid in a reservoir,this paper covers majorly all the previous work done on the application of nanoparticles in chemical enhanced oil recovery at home ***,the problems associatedwith the nano-enhanced oil recovery are outlined,and the research gap is identified,which must be addressed to implement polymeric nanofluids in chemical enhanced oil recovery.

关键词： Chemical enhanced oil recovery Mechanisms Nanoparticles Polymeric Nanofluids

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Simplified Method of Stability Analysis of Nonlinear Systems without Using of Lyapunov Concept

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Journal of Applied Mathematics and Physics 2023年第4期11卷 1049-1060页

作者： tarek Benmiloud Department of Electrical Engineering & Automation Faculty of Science and Technology University of Relizane Relizane Algeria

In this paper a new simplified method of stability study of dynamical nonlinear systems is proposed as an alternative to using Lyapunov’s method. Like the Lyapunov theorem, the new concept describes a sufficient condition for the systems to be globally stable. The proposed method is based on the assumption that, not only the state matrix contains information on the stability of the systems, but also the eigenvectors. So, first we will write the model of nonlinear systems in the state-space representation, then we use the eigenvectors of the state matrix as system stability indicators.

关键词： Stability Criterion of Nonlinear Systems Eigenvectors State-Space Representation Lyapunov Method

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Innovative Hetero-Associative Memory Encoder(HAMTE)for Palmprint Template Protection

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Computer Systems Science & Engineering 2023年第7期46卷 619-636页

作者： Eslam Hamouda Mohamed Ezz Ayman Mohamed Mostafa Murtada K.Elbashir Meshrif Alruily Mayada tarek College of Computer and Information Sciences Jouf UniversitySakaka72314Saudi Arabia College of Computers and Informatics Mansoura University35516Egypt

Many types of research focus on utilizing Palmprint recognition in user identification and *** Palmprint is one of biometric authentication(something you are)invariable during a person’s life and needs careful protection during enrollment into different biometric authentication *** and irreversibility are critical requirements for securing the Palmprint template during enrollment and *** paper proposes an innovative HAMTE neural network model that contains Hetero-Associative Memory for Palmprint template translation and projection using matrix multiplication and dot product multiplication.A HAMTE-Siamese network is constructed,which accepts two Palmprint templates and predicts whether these two templates belong to the same user or different *** HAMTE is generated for each user during the enrollment phase,which is responsible for generating a secure template for the enrolled *** proposed network secures the person’s Palmprint template by translating it into an irreversible template(different features space).It can be stored safely in a trusted/untrusted third-party authentication system that protects the original person’s template from being *** results are conducted on the CASIA database,where the proposed network achieved accuracy close to the original accuracy for the unprotected Palmprint *** recognition accuracy deviated by around 3%,and the equal error rate(EER)by approximately 0.02 compared to the original data,with appropriate performance(approximately 13 ms)while preserving the irreversibility property of the secure ***,the brute-force attack has been analyzed under the new Palmprint protection scheme.

关键词： Palmprint recognition hetero-associative memory neural network and Siamese network

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YKL-40 expression in human hepatocellular carcinoma:a potential biomarker?

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Hepatobiliary & Pancreatic Diseases International 2011年第6期10卷 605-610页

作者： tarek Hassanein Liver Center Hillcrest Medical CenterUniversity of California at San DiegoCA 92103USA

BACKGROUND:YKL-40 is a new biomarker with diagnostic value in many different *** it may serve as a biomarker for hepatocellular carcinoma (HCC) is still *** study aimed to examine the expression of YKL-40 in the serum and liver tissues of HCC patients and in HCC cell lines,in comparison with that in non-HCC liver disease patients and non-tumor hepatic cell lines,***:Immunohistochemical staining was used to detect YKL-40 protein expression in liver biopsy specimens from 8 HCC *** was used to assess the serum YKL-40 level in 90 HCC patients,90 inactive HBsAg carrier (IHC) patients with normal liver functions,and 90 liver cirrhosis ***-time PCR was used to determine the YKL-40 mRNA expression in three HCC cell lines and two non-tumor hepatic cell ***:Immunohistochemical staining of liver biopsy specimens from HCC patients showed that the YKL-40 protein expression in tumor tissue was higher than that in adjacent normal *** revealed that the YKL-40 serum level in the HCC group was significantly higher than that in the IHC group,but not significantly different from that in the cirrhosis ***-time PCR showed that YKL-40 mRNA levels in HCC cell lines were significantly higher than those in nontumor hepatic ***:YKL-40 is highly expressed in HCC at the molecular,cellular and tissue ***,it may not serve as a serum biomarker for HCC because measurement of the serum YKL-40 level cannot distinguish HCC from cirrhosis.

关键词： YKL-40 hepatocellular carcinoma cirrhosis

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Overview of genetic causes of recurrent miscarriage and the diagnostic approach

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BIOCELL 2019年第4期43卷 253-262页

作者： tarek A ATIA Prince Sattam bin Abdulaziz University College of Applied Medical SciencesMedical Laboratory Sciences DepartmentAl-kharjSaudi Arabia

Recurring miscarriage(RM)is a frustrating reproductive complication with variable *** genetic defects have been known to play a crucial role in the etiology of *** abnormalities are frequently detected,while other genetic defects cannot be diagnosed through routine research,such as cryptic chromosomal anomalies,single nucleotide polymorphism,single-gene defect,and gene copy number *** laboratories have recently used variable advanced techniques to detect potential genetic abnormalities in couples with RM and/or in products of *** we aim to summarize the known genetic causes of RM,with a focus on the new diagnostic *** of the genetic profile of miscarriages is important for prognosis and potential counseling planning,as well as the prenatal diagnostic strategy in subsequent pregnancies.

关键词： Recurrent miscarriage Genetic defects Diagnostic approach Chromosomal microarray Next-generation sequencing

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Hydrophilic bi-functional B-doped g-C_(3)N_(4) hierarchical architecture for excellent photocatalytic H_(2)O_(2) production and photoelectrochemical water splitting

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Journal of Energy Chemistry 2022年第7期31卷 236-247,I0007页

作者： Yang Ding Soumyajit Maitra Chunhua Wang Runtian Zheng Meiyu Zhang tarek Barakat Subhasis Roy Jing Liu Yu Li Tawfique Hasan Bao-Lian Su Laboratory of Inorganic Materials Chemistry(CMI) University of Namur61 rue de BruxellesB-5000 NamurBelgium Namur Institute of Structured Matter(NISM) University of Namur61 rue de BruxellesB-5000 NamurBelgium Department of Chemical Engineering University of Calcutta92 APC RoadWest BengalKolkata 700009India Department of Chemistry KU LeuvenCelestijnenlaan 200FB-3001 LeuvenBelgium State Key Laboratory of Applied Organic Chemistry Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu ProvinceCollege of Chemistry and Chemical EngineeringLanzhou UniversityLanzhou 730000GansuChina State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070HubeiChina Cambridge Graphene Centre University of CambridgeCambridgeCB30DSUK Clare Hall University of CambridgeUnited KingdomCB21EWUK

Graphitic carbon nitride(g-C_(3)N_(4))has attracted great interest in photocatalysis and ***,their poor hydrophilicity poses a great challenge for their applications in aqueous ***,we demonstrate synthesis of a hydrophilic bi-functional hierarchical architecture by the assembly of B-doped g-C_(3)N_(4)*** hierarchical B-doped g-C_(3)N_(4)material enables full utilization of their highly enhanced visible light absorption and photogenerated carrier separation in aqueous medium,leading to an excellent photocatalytic H_(2)O_(2)production rate of 4240.3μM g^(-1)h^(-1),2.84,2.64 and 2.13 times higher than that of the bulk g-C_(3)N_(4),g-C_(3)N_(4)nanoplatelets and bulk B doped g-C_(3)N_(4),*** based on these hierarchical architectures can generate an unprecedented photocurrent density of 1.72 m A cm^(-2)at 1.23 V under AM 1.5 G illumination for photoelectrochemical water *** work makes a fundamental improvement towards large-scale exploitation of highly active,hydrophilic and stable metal-free g-C_(3)N_(4)photocatalysts for various practical applications.

关键词： Boron doping Hydrophilicity Hierarchically assembled architectures Photocatalytic H_(2)O_(2)production Photoelectrocatalytic water splitting

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Intelligent Intrusion Detection System for Industrial Internet of Things Environment

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Computer Systems Science & Engineering 2023年第2期44卷 1567-1582页

作者： R.Gopi R.Sheeba K.Anguraj T.Chelladurai Haya Mesfer Alshahrani Nadhem Nemri tarek Lamoudan Department of Computer Science and Engineering Dhanalakshmi Srinivasan Engineering CollegePerambalur621212India Department of Computer Science and Engineering K.Ramakrishnan College of EngineeringTiruchirappalli621112India Department of Electronics and Communication Engineering Sona College of TechnologySalem636005India Department of Electronics and Communication Engineering PSNA College of Engineering and TechnologyDindigul624622India Department of Information Systems College of Computer and Information SciencesPrincess Nourah Bint Abdulrahman UniversityRiyadh11671Saudi Arabia Department of Information Systems College of Science&Arts at MahayilKing Khalid UniversityMuhayel Aseer62529Saudi Arabia Department of Mathematics College of Science&Arts at MahayilKing Khalid UniversityMuhayel Aseer62529Saudi Arabia

Rapid increase in the large quantity of industrial data,Industry 4.0/5.0 poses several challenging issues such as heterogeneous data generation,data sensing and collection,real-time data processing,and high request arrival *** classical intrusion detection system(IDS)is not a practical solution to the Industry 4.0 environment owing to the resource limitations and *** resolve these issues,this paper designs a new Chaotic Cuckoo Search Optimiza-tion Algorithm(CCSOA)with optimal wavelet kernel extreme learning machine(OWKELM)named CCSOA-OWKELM technique for IDS on the Industry 4.0 *** CCSOA-OWKELM technique focuses on the design of feature selection with classiﬁcation approach to achieve minimum computation complex-ity and maximum detection *** CCSOA-OWKELM technique involves the design of CCSOA based feature selection technique,which incorpo-rates the concepts of chaotic maps with ***,the OWKELM technique is applied for the intrusion detection and classiﬁcation *** addition,the OWKELM technique is derived by the hyperparameter tuning of the WKELM technique by the use of sunﬂower optimization(SFO)*** utilization of CCSOA for feature subset selection and SFO algorithm based hyperparameter tuning leads to better *** order to guarantee the supreme performance of the CCSOA-OWKELM technique,a wide range of experiments take place on two benchmark datasets and the experimental outcomes demonstrate the promis-ing performance of the CCSOA-OWKELM technique over the recent state of art techniques.

关键词： Intrusion detection system artiﬁcial intelligence machine learning industry 4.0 internet of things

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Availability,sustainability and accessibility of agro crop residue production and solar radiation in Egypt for producing highly chemical products through pyrolysis processes

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Clean Energy 2023年第3期7卷 654-670页

作者： Saad A.El-Sayed Mohamed A.Ismail Mohamed E.Mostafa Emad H.Noseir tarek M.Khass Mechanical Power Engineering Department Faculty of EngineeringZagazig UniversityAl-SharkiaEgypt Mechanical Engineering Department College of EngineeringKing Faisal UniversityAl-AhsaSaudi Arabia Environmental Engineering Department Faculty of EngineeringZagazig UniversityAl-SharkiaEgypt

This study examines the large amount of agricultural waste produced in Egypt between 2010 and 2019 by analysing data from various departments within the Agriculture *** also provides a comprehensive database on the biomass available from agricultural waste in Egypt and its potential applications for producing power,heat and chemical *** biomass-pyrolysis systems powered by solar energy are used,research demonstrates the potential to convert agricultural waste into a variety of chemical *** approach utilizes solar energy,a clean and renewable source,and has wide-ranging industrial and power generation *** Egypt’s reliance on agriculture,the country currently utilizes little biomass for energy production and has not previously used it as a source for creating chemical products,which could potentially save on the imported oil used in these *** findings of the study are graphically presented using histograms,pie charts,*** overall production of residues reached the 30-Mt level in *** it contains the most rice-cultivated land,Dakahlia(Lower Egypt region)produces the highest percentage of the total residue(37.17%).Qena governorate(Upper Egypt region)produces 1.14 metric tons of residues,with sugarcane accounting for 20.3%of the total.

关键词： biomass agro-residue solar radiation pyrolysis chemical products sustainability

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Long-term changes in sea surface temperature(SST)within the southern Levantine Basin

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Acta Oceanologica Sinica 2021年第3期40卷 27-33页

作者： tarek M.El-Geziry Laboratory of Physical Oceanography Division of Marine EnvironmentNational Institute of Oceanography and Fisheries(NIOF)Alexandria21556Egypt

Knowledge of sea surface temperature(SST)behaviour is vital for long-term climate *** study highlights essential outcomes about the distinguishable and unsurprising warming of the SST along the southern border of the Levantine *** analysis is based on monthly SST data for the period *** southern Levantine Basin has undergone SST increase,during the last 71 *** this study,a consistent warming trend has been found for the analysed SST data series,with a rate of 0.04℃/a,i.e.,0.4℃/(10 a).From 1975 to 1991 the mean annual SST was 17.1℃,and this increased to be 19.2℃,over the period *** revealed two opposite trends of variability:a decreasing trend(−0.06℃/a)over the period 1975-1991,and an increasing trend(0.2℃/a)from 2002 to *** the period 1948-2018,positive mean annual SST anomalies had an average of 1.8℃,and negative anomalies had an average of−1.1℃.The lowest SST total increase was found from January to April,with values about 0.03℃,while the highest warming appeared from June to *** driving mechanisms behind the SST changes need to be more investigated,to understand the future trends and impacts of climate change in the Levantine Basin.

关键词： Mediterranean Sea Levantine Basin sea surface temperature anomaly trends warming

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