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The Synthetic and Mechanical Properties of a Silica Matrix Cermet Composite

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Journal of Wuhan University of Technology(Materials Science) 2022年第3期37卷 423-428页

作者： Sufian h humeedi Saadoon M Abdulkareem salih Y Darweesh Department of Physics College of ScienceTikrit UniversityTikritIraq Physics Department College of EducationSamaraa UniversitySamaraaIraq Physics Department College of Education TuzKhurmatuTikrit UniversityTikritIraq

A cermet composite was prepared by employing thermal spraying flame onto stainless steel surfaces of(304)*** 25,50%of aluminum was mixed with matrix of(10%Al_(2)O_(3)-SiO_(2)).A spray system consistis of oxygen barrel,acetylene and spray gun that contains powders feeder at different spray distances(5,10,15,20 and 25 cm).The thermal treatment of the samples resulting from spraying was performed at 1100℃for 1.5 *** physical examinations(porosity and adhesion),mechanical tests(hardness and wear rate)and Atomic Force Microscope(AFM)test were performed before and after thermal *** test results showed that the best mixing rate was(50%)and the best spray distance was(15cm)where the quality of coating layer improved after thermal treatment at 1100℃for 1.5 hr with a porosity ratio reduced from 11.2%to 6.6%,and adhesion strength improved with the increase in the alumina content to 50%.The results demonstrated that the best adhesion value after thermal treatment was 30.98 *** hardness of coating layer increased from 45.78 to 54.88 hV;while the lowest rate of wear was at 50%of alumina with a spray distance of ***,there was a clear improvement based on AFM within grain size,root mean square and roughness rate.

关键词： spraying by flame ceramic oxides composites atomic force microscope

Synthesis and spectral studies of macrocyclic Pb(Ⅱ),Zn(Ⅱ),Cd(Ⅱ)and La(Ⅲ) complexes derived from 1,4-bis(3-aminopropoxy)butane with metal nitrate and salicylaldehyde derivatives

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Chinese Chemical Letters 2009年第3期20卷 339-343页

作者： salih Ilhan hamdi Temel salih Pasa Department of Chemistry Faculty of Art and SciencesSiirt UniversitySiirtTurkey Department of Chemistry Faculty of EducationDicle UniversityDiyarbakirTurkey

Eight new macrocyclic complexes were synthesized by template reaction of 1,4-bis（3-aminopropoxy）butane with metal nitrate and 1,3-bis（2-formylphenyl）propane or 1,4-bis（2-formylphenyl）butane and their structures were proposed on the basis of elemental analysis, FTIR, UV-vis, molar conductivity measurements, ^1h NMR and mass spectra. The metals to ligand molar ratios of the complexes were found to be 1： 1. The complexes are 1：2 electrolytes for Pb（II）, Zn（II） and Cd（II） complexes and 1：3 electrolytes for La（III） as shown by their molar conductivities （Am） in DMSO at 10^-3 mol L^-1. Due to the existence of free ions in these complexes, such complexes are electrically conductive. The configurations of La（III） and Pb（II） were proposed to probably octahedral and Zn（II） and Cd（II） complexes were proposed to probably tetrahedral.

关键词： Macrocyclic Schiff base Macrocyclic complexes Salicylaldehyde derivatives 1,4-Bis(3-aminopropoxy)butane

Simulation of foamed concrete compressive strength prediction using adaptive neuro-fuzzy inference system optimized by nature-inspired algorithms

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Frontiers of Structural and Civil Engineering 2021年第1期15卷 61-79页

作者： Ahmad ShARAFATI h.NADERPOUR Sinan Q.salih E.ONYARI Zaher Mundher YASEEN Department of Civil Engineering Science and Research BranchIslamic Azad UniversityTehranIran Faculty of Civil Engineering Semnan UniversitySemnan ***Iran Computer Science Department Dijlah University CollegeBaghdadIraq Department of Civil and Chemical Engineering College of ScienceEngineering and TechnologyUniversity of South AfricaJohannesburgSouth Africa Institute of Research and Development Duy Tan UniversityDa Nang 550000Vietnam

Concrete compressive strength prediction is an essential process for material design and *** study investigates several novel hybrid adaptive neuro-fuzzy inference system(ANFIS)evolutionary models,i.e.,ANFIS-particle swarm optimization(PSO),ANFIS-ant colony,ANFIS-differential evolution(DE),and ANFIS-genetic algorithm to predict the foamed concrete compressive *** concrete properties,including cement content(C),oven dry density(O),water-to-binder ratio(W),and foamed volume(F)are used as input variables.A relevant data set is obtained from open-access published experimental investigations and used to build predictive *** performance of the proposed predictive models is evaluated based on the mean performance(MP),which is the mean value of several statistical error *** optimize each predictive model and its input variables,univariate(C,O,W,and F),bivariate(C-O,C-W,C-F,O-W,O-F,and W-F),trivariate(C-O-W,C-W-F,O-W-F),and four-variate(C-O-W-F)combinations of input variables are constructed for each *** results indicate that the best predictions obtained using the univariate,bivariate,trivariate,and four-variate models are ANFIS-DE-(O)(MP=0.96),ANFIS-PSO-(C-O)(MP=0.88),ANFIS-DE-(O-W-F)(MP=0.94),and ANFIS-PSO-(C-O-W-F)(MP=0.89),***-PSO-(C-O)yielded the best accurate prediction of compressive strength with an MP value of 0.96.

关键词： foamed concrete adaptive neuro fuzzy inference system nature-inspired algorithms prediction of compressive strength

A Novel Cryptocurrency Prediction Method Using Optimum CNN

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Computers, Materials & Continua 2022年第4期71卷 1051-1063页

作者： Syed h.hasan Syeda huyam hasan Mohammed salih Ahmed Syed hamid hasan Iowa State University AmesUSA University of Texas at Arlington USA Department of Computer Engineering College of Computer Science and Information TechnologyImam Abdulrahman Bin Faisal UniversityDammamSaudi Arabia Department of Information Systems Faculty of Computing and Information TechnologyKing Abdulaziz UniversityJeddahSaudi Arabia

In recent years,cryptocurrency has become gradually more significant in economic regions *** cryptocurrencies,records are stored using a cryptographic *** main aim of this research was to develop an optimal solution for predicting the price of cryptocurrencies based on user opinions from social *** is used as a marketing tool for cryptoanalysis owing to the unrestricted conversations on cryptocurrencies that take place on social media ***,this work focuses on extracting Tweets and gathering data from different sources to classify them into positive,negative,and neutral categories,and further examining the correlations between cryptocurrency movements and Tweet *** paper proposes an optimized method using a deep learning algorithm and convolution neural network for cryptocurrency prediction;this method is used to predict the prices of four cryptocurrencies,namely,Litecoin,Monero,Bitcoin,and *** results of analyses demonstrate that the proposed method forecasts prices with a high accuracy of about 98.75%.The method is validated by comparison with existing methods using visualization tools.

关键词： Cryptocurrency litecoin monero bitcoin ethereum twitter optimal CNN price prediction sentiment analysis

Synthesis and Characterization of New Macrocyclic Cu（Ⅱ） Complexes from Various Diamines, Copper（Ⅱ） Nitrate and 1,4-Bis（2-formylphenoxy）butane

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Chinese Journal of Chemistry 2007年第10期25卷 1547-1550页

作者： ILhAN, salih TEMEL, hamdi KILIC, Ahmet Chemistry Department Faculty of Education Dicle University Diyarbakir 21010 Turkey Chemistry Department Faculty of Art and Science Harran University Sanhurfa 63100 Turkey

Six new macrocyclic complexes were synthesized by a template reaction of 1,4-bis（2-formylphenoxy）butane with diamines and Cu（NO3）2·3h2O and their structures were proposed on the basis of elemental analysis, FT-IR, UV-Vis, magnetic susceptibility measurements, molar conductivity measurements and mass spectra. The metal to ligand molar ratios of the Cu（Ⅱ） complexes were found to be 1 ： 1. The Cu（Ⅱ） complexes are 1 ： 2 electrolytes as shown by their molar conductivities （∧m） in DMF at 10^-3 mol·L^-1. Due to the existence of free ions the Cu（Ⅱ） complexes are electrically conductive. Their configurations were proposed to be probably distorted octahedral.

关键词： macrocyclic Schiff base complex 1,4-bis(2-formylphenoxy)butane diamine copper(Ⅱ) complex

Performance investigation of LAMBDA and bootstrapping methods for PPP narrow-lane ambiguity resolution

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Geo-Spatial Information Science 2021年第4期24卷 604-614页

作者： Omer Faruk Atiz Sermet Ogutcu salih Alcay Pan Li Ilkay Bugdayci Department of Geomatics Engineering Necmettin Erbakan UniversityKonyaTurkey Department of Geodesy and Remote Sensing German Research Centre for GeosciencesPotsdamGermany

Precise point positioning with ambiguity resolution(PPP-AR)is a powerful tool for geodetic and time-constrained applications that require high *** performance of PPP-AR highly depends on the reliability of the correct integer carrier-phase ambiguity *** this study,the performance of narrow-lane ambiguity resolution of PPP using the Least-squares AMBiguity Decorrelation(LAMBDA)and bootstrapping methods is extensively investigated using real data from 55 IGS stations over one-month in *** PPP with 24-,12-,8-,4-,2-,1-and½-h sessions using two different cutoff angles(7°and 30°)was conducted with three PPP modes:***-float and two kinds of ambiguity-fixed PPP using the LAMBDA and bootstrapping methods for narrow-lane AR,*** results show that the LAMBDA method can produce more reliable results for 2 hour and shorter observation sessions com-pared with the bootstrapping method using a 7°cutoff *** a 30°cutoff angle,the LAMBDA method outperforms the bootstrapping method for observation sessions of 4 h and *** long observation times,the bootstrapping method produced much more accurate coordinates compared with the LAMBDA method without considering the wrong fixes *** results also show that occurrences of fixing the wrong integer ambiguities using the bootstrapping method are higher than that of the LAMBDA method.

关键词： Ambiguity resolution narrow-lane Precise point positioning(PPP) LAMBDA bootstrapping

Alanine aminotransferase normalization at week 8 predicts viral response during hepatitis C treatment

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World Journal of Gastroenterology 2013年第46期19卷 8678-8686页

作者： Umit Bilge Dogan Mustafa salih Akin Serkan Yalaki Departments of Gastroenterology Adana Numune Training and Research Hospital

AIM:To investigate alanine aminotransferase(ALT)and sustained virological response(SVR)in chronic hepatitis C(ChC)during peginterferon-ribavirin ***:One hundred and fifty-one genotype 1ChC patients underwent treatment for 48 wk with peginterferon and ribavirin,and were retrospectively divided into two groups as having a rapid virological response(RVR)(Group 1,n=52)and not having an RVR(Group 2,n=99).We also subdivided each group into two according to the initial ALT level being high(Group1h and Group 2h)or normal(Group 1n and Group 2n).hCV RNA and ALT levels were measured at baseline;at 4,12,24 and 48 wk during the treatment period;and at 24 wk *** levels were also obtained at 8 *** to the results of ALT,patients were enrolled in either the follow-up abnormal or follow-up normalized ALT groups at each *** with high and normal ALT levels were compared for each interval in terms of ***:The SVR rates were 83%vs 40%(P=0.000),82%vs 84%(P=0.830),and 37%vs 44%(P=0.466)when comparing Group 1 with 2,1h with1n,and 2h with 2n,*** Group 2h,the SVR rates were 34%vs 40%(P=0.701),11%vs 52%(P=0.004),12%vs 50%(P=0.007),7%vs 50%(P=0.003),6%vs 53%(P=0.001),and 0%vs 64%(P=0.000)when comparing patients with high and normalized ALT levels at week 4,8,12,24,48 and 72,*** multiple logistic regression analysis revealed that RVR(OR=7.05;95%CI:3.1-16.05,P=0.000),complete early virological response(cEVR)(OR=17.55;95%CI:6.32-48.76,P=0.000),normalization of ALT at8 wk(OR=3.04;95%CI:1.31-7.06,P=0.008),and at 12 wk(OR=4.21;95%CI:1.65-10.76,P=0.002)were identified as independent significant predictive factors for ***:Normalization of ALT at 8 wk may predict viral response during peginterferon-ribavirin treatment in genotype-1 ChC patients especially without RVR.

关键词： Chronic hepatitis C Genotype-1 Alanine aminotransferase Rapid virological response Sustained virological response,Interferon Ribavirin

Resource Exhaustion Attack Detection Scheme for WLAN Using Artificial Neural Network

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Computers, Materials & Continua 2023年第3期74卷 5607-5623页

作者： Abdallah Elhigazi Abdallah Mosab hamdan Shukor Abd Razak Fuad A.Ghalib Muzaffar hamzah Suleman Khan Siddiq Ahmed Babikir Ali Mutaz h.h.Khairi Sayeed salih Faculty of Engineering Future UniversityKhartoum 10553Sudan Faculty of Computing and Informatics Universiti Malaysia SabahKota Kinabalu88400Malaysia Information Assurance and Security Research School of ComputingUniversiti Teknologi MalaysiaJohor81310Malaysia School of Psychology and Computer Science University of Central LancashirePreston PR12HEUK Deaptement of Management Information Systems College of Administrative ScienceApplied Science UniversityAl Eker623Bahrain Deaptement of Information Technology College of Computer and Information SciencesKing Saud UniversityRiyadh11461Saudi Arabia

IEEE 802.11 Wi-Fi networks are prone to many denial of service(DoS)attacks due to vulnerabilities at the media access control(MAC)layer of the 802.11 *** to the data transmission nature of the wireless local area network(WLAN)through radio waves,its communication is exposed to the possibility of being attacked by illegitimate ***,the security design of the wireless structure is vulnerable to versatile *** example,the attacker can imitate genuine features,rendering classificationbased methods inaccurate in differentiating between real and false *** security standards have been proposed over the last decades to overcome many wireless network attacks,effectively detecting such attacks is crucial in today’s real-world *** paper presents a novel resource exhaustion attack detection scheme(READS)to detect resource exhaustion attacks *** proposed scheme can differentiate between the genuine and fake management frames in the early stages of the attack such that access points can effectively mitigate the consequences of the *** scheme is built through learning from clustered samples using artificial neural networks to identify the genuine and rogue resource exhaustion management frames effectively and efficiently in *** proposed scheme consists of four modules whichmake it capable to alleviates the attack impact more effectively than the related *** experimental results show the effectiveness of the proposed technique by gaining an 89.11%improvement compared to the existing works in terms of detection.

关键词： 802.11 media access control(MAC) wireless local area network(WLAN) artificial neural network denial-of-service(DoS)

Post-hepatectomy liver failure:A timeline centered review

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hepatobiliary & Pancreatic Diseases International 2023年第6期22卷 554-569页

作者： Mohamed Bekheit Lisa Grundy Ahmed KA salih Petru Bucur Eric Vibert Mudassar Ghazanfar Department of Surgery NHS GrampianForesterhill Health CampusAshgrove RoadAB252ZN AberdeenUK Institute of Medical Sciences Medical SchoolForesterhill Health CampusAshgrove RoadAB252ZN AberdeenUK hépatica Integrated Center of HPB CareElite HospitalAgriculture RoadAlexandriaEgypt Department of Surgery University Hospital ToursVal de la Loire 37000France Centre hépatobiliaire Paul Brousse Hospital12 Paul Valliant Couturier94804 VillejuifFrance

Background: Post-hepatectomy liver failure(PhLF) is a leading cause of postoperative mortality after liver surgery. Due to its significant impact, it is imperative to understand the risk stratification and preventative strategies for PhLF. The main objective of this review is to highlight the role of these strategies in a timeline centered way around curative resection. Data sources: This review includes studies on both humans and animals, where they addressed PhLF. A literature search was conducted across the Cochrane Library, Embase, MEDLINE/Pub Med, and Web of Knowledge electronic databases for English language studies published between July 1997 and June 2020. Studies presented in other languages were equally considered. The quality of included publications was assessed using Downs and Black’s checklist. The results were presented in qualitative summaries owing to the lack of studies qualifying for quantitative analysis. Results: This systematic review with 245 studies, provides insight into the current prediction, prevention, diagnosis, and management options for PhLF. This review highlighted that liver volume manipulation is the most frequently studied preventive measure against PhLF in clinical practice, with modest improvement in the treatment strategies over the past decade. Conclusions: Remnant liver volume manipulation is the most consistent preventive measure against PhLF.

关键词： Post-hepatectomy liver failure Liver neoplasms Prediction Prevention Management