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Joint slip investigation based on finite element modelling verified by experimental results on wind turbine lattice towers

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Frontiers of Structural and Civil Engineering 2018年第3期12卷 341-351页

作者： saleh YAGhOOBi Ahmad ShOOShTARi Civil Engineering Department Ferdowsi University of Mashhad Mashhad Iran

Slippage corresponds to the relative displacement of a bolted joint subjected to shear loads since the construction clearance between the bolt shank and the bolthole at assembly can cause joint slip. Deflections of towers with joint slippage effects is up to 1.9 times greater than the displacements obtained by linear analytical methods. in this study, 8 different types of joints are modelled and studied in the finite element program, and the results are verified by the experimental results which have been done in the laboratory. Moreover, several types of joints have been modelled and studied and load-deformation curves have also been presented. Finally, joint slip data for different types of angles, bolt diameter and bolt arrangements are generated. Thereupon, damping ratios （ζ） for different types of connections are reported. The study can be useful to help in designing of wind turbine towers with a higher level of accuracy and safety.

关键词： Joint slip cyclic loading Finite element modelling Experimental joint behavior damping ratios (ζ)

investigation of sensitivity and threshold voltage shift of commercial MOSFETs in gamma irradiation

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Nuclear Science and Techniques 2016年第6期27卷 166-171页

作者： saleh Ashrafi Baharak Eslami Faculty of Physics University of Tabriz Department of Physics Payame Noor University

This article is about the absorbed-dose-dependent threshold voltage shift of the MOSFET *** of the MOSFETs has been tested in different gate *** of the transistors for 662 ke V gamma ray is studied in 1–5 Gy dose *** was found that for transistors irradiated in biased mode,significant changes in the threshold voltage occurred,and the sensitivity to gamma rays increased with the bias voltage.

关键词：阈值电压漂移 MOSFET γ射线照射敏感性商业吸收剂量偏置电压晶体管

Data Analytics for the identification of Fake Reviews Using Supervised Learning

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Computers, Materials & Continua 2022年第2期70卷 3189-3204页

作者： saleh Nagi Alsubari Sachin N.Deshmukh Ahmed Abdullah Alqarni Nizar Alsharif Theyazn h.h.Aldhyani Fawaz Waselallah Alsaade Osamah i.Khalaf Department of Computer Science&information Technology Dr.Babasaheb Ambedkar Marathwada UniversityAurangabadIndia Department of Computer Sciences and information Technology Albaha UniversitySaudi Arabia Department of Computer Engineering and Science Albaha UniversitySaudi Arabia Community College of Abqaiq King Faisal UniversityAl-AhsaSaudi Arabia College of Computer Science and information Technology King Faisal UniversityAl-AhsaSaudi Arabia Al–Nahrain University BagdadIraq

Fake reviews,also known as deceptive opinions,are used to mislead people and have gained more importance *** is due to the rapid increase in online marketing transactions,such as selling and purchasing.E-commerce provides a facility for customers to post reviews and comment about the product or service when *** customers usually go through the posted reviews or comments on the website before making a purchase ***,the current challenge is how new individuals can distinguish truthful reviews from fake ones,which later deceives customers,inflicts losses,and tarnishes the reputation of *** present paper attempts to develop an intelligent system that can detect fake reviews on ecommerce platforms using n-grams of the review text and sentiment scores given by the *** proposed methodology adopted in this study used a standard fake hotel review dataset for experimenting and data preprocessing methods and a term frequency-inverse document frequency(TF-iDF)approach for extracting features and their *** detection and classification,n-grams of review texts were inputted into the constructed models to be classified as fake or ***,the experiments were carried out using four different supervised machine-learning techniques and were trained and tested on a dataset collected from the Trip Advisor *** classification results of these experiments showed that na飗e Bayes(NB),support vector machine(SVM),adaptive boosting(AB),and random forest(RF)received 88%,93%,94%,and 95%,respectively,based on testing accuracy and tje *** obtained results were compared with existing works that used the same dataset,and the proposed methods outperformed the comparable methods in terms of accuracy.

关键词： E-commerce fake reviews detection methodologies machine learning hotel reviews

Preparation and Characterization of Some Ferrites from CuO-ZnO-Fe_2O_3 Mixtures

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Journal of Materials Science & Technology 1998年第3期14卷 236-240页

作者： A.A.hanna h.i.saleh and M.Sh.Khalil(inorg. Chem. Dept., National Research Centre, Dokki, Cairo, Egypt) inorg. Chem. Dept. National Research Centre Dokki Cairo Egypt

The ferrites of Cuo-ZnO-Fe2o3 solid solution series near the molar ratio of ZnxCu1-x were prepared by direct heating of their coprecipitated hydroxides using Nh4Oh as precipitating agent where x=0.0, 0.2, 0.5, 0.8 and 1.0. Additional amounts of Cu and Zn sulphates were added to compensate the loss during the coprecipitation of the hydroxides. The ferritized samples were characterized by chemical analysis, XRD. DTA, TGA and SEM. XRD of both Zn0.2Cu0.8Fe2O4 and Zn0.5Cu0.5 Fe2O4 that indicates the formation of a heterogeneous ferrite material of ZnFe2O4 and CuFe2O4 mixed with variable amounts of α-Fe2O3. Zn and Cu ferrites were observed only in *** TGA-time relation, the activation energy of the different transformation phases were calculated. it is found that, the activation energy of ZnFe2O4 is slightly equal to 3/2 of that for CuFe2O4. Dielectric measurements show that the electrical behaviour depends on the ordering and disordering of the phases.

关键词： CuO ZnO Fe Preparation and Characterization of Some Ferrites from CuO-ZnO-Fe2O3 Mixtures

DNA Sequence Analysis for Brain Disorder Using Deep Learning and Secure Storage

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Computers, Materials & Continua 2022年第6期71卷 5949-5962页

作者： Ala saleh Alluhaidan Departmemt of information Systems College of Computer and Information SciencePrincess Nourah Bint Abdulrahman UniversityRiyadh 11671Saudi Arabia

Analysis of brain disorder in the neuroimaging of Magnetic Resonance imaging(MRi),Positron Emission Tomography(PET),and Computed Tomography(CT)needs to understand the functionalities of the brain and it has been performed using *** learning algorithms have also been applied in genomics data *** brain disorder diseases of Alzheimer,Schizophrenia,and Parkinson are analyzed in this *** main issue in the traditional algorithm is the improper detection of disorders in the neuroimaging *** paper presents a deep learning algorithm for the classification of brain disorder using Deep Belief Network(DBN)and securely storing the image using a Deoxyribonucleic Acid(DNA)Sequence-based Joint Photographic Experts Group(JPEG)Zig Zag Encryption Algorithm(DBNJZZ).in this work,DBNJZZ implements an efficient and effective prediction model for disorders using the open-access datasets of Alzheimer’s Disease Neuroimaging initiative(Adni),the Center for Biomedical Research Excellence(Cobre),the Open Access Series of imaging Studies(Oasis),the Function Biomedical informatics Research Network(Fbirn),a Parkinson’s dataset of 55 patients and 23 subjects with Parkinson’s syndromes(Ntua),and the Parkinson’s Progression Markers initiative(Ppmi).This algorithm is implemented and tested using performance metric measures of accuracy,Root Mean Square Error(RMSE),Mean Absolute Error(MAE),and Mean Absolute Percentage Error(MAPE).DBNJZZ gives better performance with an accuracy of 99.21%and also surpasses previous methods on other measures.

关键词： DBN Zig zag deep learning MAPE RMSE DNA genomics

The sexually dimorphic expression of glutamate transporters and their implication in pain after spinal cord injury

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Neural Regeneration Research 2025年第11期20卷 3317-3329页

作者： Jennifer M.Colón-Mercado Aranza i.Torrado-Tapias iris K.Salgado Jose M.Santiago Samuel E.Ocasio Rivera Dina P.Bracho-Rincon Luis h.Pagan Rivera Jorge D.Miranda Department of Physiology University of Puerto RicoMedical Sciences CampusSan JuanPRUSA National institutes of health National Human Genome Research InstituteBethesdaMDUSA Universidad Central del Caribe School of MedicineBayamónPRUSA University of Puerto Rico Carolina CampusCarolinaPRUSA institute of Neurobiology San JuanPRUSA

in addition to the loss of motor function,~60% of patients develop pain after spinal cord *** cellular-molecular mechanisms are not well understood,but the data suggests that plasticity within the rostral,epicenter,and caudal penumbra of the injury site initiates a cellularmolecular interplay that acts as a rewiring mechanism leading to central neuropathic *** can lead to the formation of new connections triggering abnormal sensory *** excitatory glutamate transporters are responsible for the reuptake of extracellular glutamate which makes them a critical target to prevent neuronal hyperexcitability and *** previous studies showed a sexually dimorphic therapeutic window for spinal cord injury after treatment with the selective estrogen receptor modulator *** this study,we investigated the anti-allodynic effects of tamoxifen in male and female rats with spinal cord *** hypothesized that tamoxifen exerts anti-allodynic effects by increasing the expression of glutamate transporters,leading to reduced hyperexcitability of the secondary neuron or by decreasing aberrant *** and female rats received a moderate contusion to the thoracic spinal cord followed by subcutaneous slow-release treatment of tamoxifen or matrix pellets as a control(placebo).We used von Frey monofilaments and the“up-down method”to evaluate mechanical *** treatment decreased allodynia only in female rats with spinal cord injury revealing a sexdependent *** expression profile of glutamatergic transporters(excitatory amino acid transporter 1/glutamate aspartate transporter and excitatory amino acid transporter 2/glutamate transporter-1)revealed a sexual dimorphism in the rostral,epicenter,and caudal areas of the spinal cord with a pattern of expression primarily on *** rodents showed a significantly higher level of excitatory amino acid transporter-1 expression while male rodents showed increased

关键词： allodynia central neuropathic pain EAAT-1/GLAST EAAT-2/GLT-1 glutamate transporters selective estrogen receptor modulator sexual dimorphism spinal cord injury trauma

Exact solutions for nonlinear partial fractional differential equations

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Chinese Physics B 2012年第11期21卷 32-38页

作者： Khaled A.Gepreel saleh Omran Mathematics Department Faculty of ScienceZagazig University Mathematics Department Faculty of ScienceTaif University Mathematics Department Faculty of scienceSouth Valley University

′in this article, we use the fractional complex transformation to convert nonlinear partial fractional differential equations to nonlinear ordinary differential equations. We use the improved （G′/G）-expansion function method to calculate the exact solutions to the time- and space-fractional derivative foam drainage equation and the time- and space-fractional derivative nonlinear KdV equation. This method is efficient and powerful for solving wide classes of nonlinear evolution fractional order equations.

关键词： fractional calculus complex transformation modified Riemann-Liouville derivative im- proved (G′/G)-expansion function method

Type-2 Neutrosophic Set and Their Applications in Medical Databases Deadlock Resolution

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Computers, Materials & Continua 2023年第2期74卷 4417-4434页

作者： Marwan h.hassan Saad M.Darwish saleh M.Elkaffas Department of Advocacy and Public Speaking Imam Al-Adham University CollegeAnbar55431Iraq Department of information Technology Institute of Graduate Studies and ResearchAlexandria UniversityAlexandria21526Egypt College of Computing and information Technology Arab Academy for ScienceTechnology and Maritime TransportAlexandria1029Egypt

Electronic patient data gives many advantages,but also new *** may delay procedures like acquiring patient *** deadlock resolution solutions introduce uncertainty due to inaccurate transaction *** computing-based solutions have been developed to solve this *** a single framework,ambiguous,vague,incomplete,and inconsistent transaction attribute information has received minimal *** work presented in this paper employed type-2 neutrosophic logic,an extension of type-1 neutrosophic logic,to handle uncertainty in real-time deadlock-resolving *** proposed method is structured to reflect multiple types of knowledge and relations among transactions’features that include validation factor degree,slackness degree,degree of deadline-missed transaction based on the degree of membership of truthiness,degree ofmembership of indeterminacy,and degree ofmembership of ***,the footprint of uncertainty(FOU)for truth,indeterminacy,and falsity represents the level of uncertainty that exists in the value of a grade of *** employed a distributed real-time transaction processing simulator(DRTTPS)to conduct the simulations and conducted experiments using the benchmark Pima indians diabetes dataset(PiDD).As the results showed,there is an increase in detection rate and a large drop in rollback rate when this new strategy is *** performance of Type-2 neutrosophicbased resolution is better than the Type-1 neutrosophic-based approach on the execution ratio *** improvement rate has reached 10%to 20%,depending on the number of arrived transactions.

关键词： Deadlock recovery type-2 neutrosophic set healthcare databases distributed deadlock detection

On Time-Constant Robust Tuning of Fractional Order [Proportional Derivative] Controllers

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iEEE/CAA Journal of Automatica Sinica 2019年第5期6卷 1179-1186页

作者： Vahid Badri Mohammad saleh Tavazoei Electrical Engineering Department Sharif University of TechnologyTehranIran

This paper deals with analyzing a newly introduced method for tuning of fractional order [proportional derivative](FO[PD]) controllers to be used in motion control. By using this tuning method, not only the phase margin and gain crossover frequency are adjustable, but also robustness to variations in the plant time-constant is guaranteed. Conditions on the values of control specifications(desired phase margin and gain crossover frequency) for solution existence in this tuning method are found. Also, the number of solutions is analytically determined in this study. Moreover, experimental verifications are presented to indicate the applicability of the obtained results.

关键词： Fractional order controller robustness solution existence tuning method