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Aspect-Based Sentiment Analysis for Polarity Estimation of Customer Reviews on Twitter

Computers, Materials & Continua 2021年第5期67卷 2203-2225页

作者： Ameen Banjar Zohair Ahmed Ali Daud rabeeh ayaz abbasi Hussain Dawood Department of Information Systems and Technology College of Computer Science and EngineeringUniversity of JeddahJeddah21589Saudi Arabia Air University Islamabad44000Pakistan Department of Computer Science Islamabad44000Pakistan Department of Computer and Network Engineering College of Computer Science and EngineeringUniversity of JeddahJeddah21589 Saudi Arabia

Most consumers read online reviews written by different users before making purchase decisions,where each opinion expresses some ***,sentiment analysis is currently a hot topic of *** particular,aspect-based sentiment analysis concerns the exploration of emotions,opinions and facts that are expressed by people,usually in the form of *** is crucial to consider polarity calculations and not simply categorize reviews as positive,negative,or ***,the available lexicon-based method accuracy is affected by limited *** of the available polarity estimation techniques are too general and may not reect the aspect/topic in question if reviews contain a wide range of information about different *** paper presents a model for the polarity estimation of customer reviews using aspect-based sentiment analysis(ABSA-PER).ABSA-PER has three major phases:data preprocessing,aspect co-occurrence calculation(CAC)and polarity estimation.A multi-domain sentiment dataset,Twitter dataset,and trust pilot forum dataset(developed by us by dened judgement rules)are used to verify *** outcomes show that ABSA-PER achieves better accuracy,i.e.,85.7%accuracy for aspect extraction and 86.5%accuracy in terms of polarity estimation,than that of the baseline methods.

关键词： Natural language processing sentiment analysis aspect co-occurrence calculation sentiment polarity customer reviews twitte

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Does acid pickling of Mg-Ca alloy enhance biomineralization?

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Journal of Magnesium and Alloys 2021年第3期9卷 1028-1038页

作者： Shebeer A Rahim VP Muhammad rabeeh M A Joseph T Hanas Department of Mechanical Engineering National Institute of Technology CalicutKerala 673601India Nanomaterials Research Laboratory School of Materials Science and EngineeringNational Institute of Technology CalicutKerala 673601India

The mechanical and physical properties of biodegradable magnesium(Mg)alloys make them suitable for temporary orthopaedic *** success of these alloys depends on their performance in the physiological *** the present work,surface modification of Mg-Ca binary alloy by acid pickling for better biomineralization and controlled biodegradation is *** corrosion rates of nitric and phosphoric acid treated samples were analysed by conducting electrochemical corrosion *** vitro degradation behaviour was studied using immersion test in simulated body fluid(SBF).The sample surfaces were characterized using scanning electron microscope(SEM),energy dispersive X-ray spectroscopy(EDS),Fourier transform infrared spectroscopy(FTIR)and X-ray photoelectron spectroscopy(XPS).It is seen that acid pickling leads to significant improvement in biomineralization and develop in situ calcium phosphate(Ca P)coating on the sample *** addition,the treated samples recorded a reduced degradation rate in the SBF compared to untreated ***,acid pickling is suggested as an effective surface treatment method to tailor the biomineralization and degradation behaviour of the Mg-Ca alloy in the physiological environment.

关键词： Inorganic acid pickling Magnesium alloy Surface pretreatment Surface characterization Biomineralization Degradation rate

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Isolation of Stenotrophomonas maltophilia from clinical samples: An investigation of patterns motility and production of melanin pigment

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Asian Pacific Journal of Tropical Biomedicine 2017年第9期7卷 826-830页

作者： rabeeh Izadi Amoli Jamileh Nowroozi Azar Sabokbar Ramazan Rajabniya Department of Microbiology Karaj BranchIslamic Azad UniversityKarajIran Microbiology Department of Islamic Azad University North Tehran Branch Iran Infectious Diseases and Tropical Medicine Research Center Babol University of Medical SciencesBabolIran

Objectives: To investigate possible sources of Stenotrophomonas maltophilia(S. maltophilia) in the clinical ***: Different samples were collected from Amol City of Iran. Steps for the identification of S. maltophilia included culturing, biochemical tests, polymerase chain reaction(PCR) of 16 S r RNA gene and 23 S r RNA gene. In addition, production of melanin pigment and patterns of motility of the bacteria, were also ***: In our study, 20 S. maltophilia strains were isolated from clinical sources,oxygen manometer apparatus of hospitals were 7/110(6.36%), blood was 1/777(0.13%),sputum was 4/40(4%), urine was 1/2 947(0.03%), tap water was 1/240(0.42%) and dental suction was 6/120(5%). The isolated bacteria showed production of melanin pigment with rates of strong, moderate, weak, and lack of pigment. Types of motilities were seen in ***: The highest percentage of bacteria is isolated of oxygen manometer system and dental suction, yet has not been reported from oxygen manometer system. These bacteria have also been associated with patients who have respiratory problems, so it is essential for staffs of hospitals to draw attention to this source of bacteria.

关键词： Stenotrophomonas maltophilia 23S rRNA Melanin Motility

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Mechanistic, Energetic and Structural Aspects of the Adsorption of Carmustine on the Functionalized Carbon Nanotubes

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Chinese Journal of Structural Chemistry 2017年第10期36卷 1639-1646页

作者： KHORRAM rabeeh MORSALI Ali RAISSI Heidar HAKIMI Mohammad BEYRAMABADI S. Ali Chemistry Department Payame Noor University 19395-4697 Tehran I. R. of IRAN Department of Chemistry Mashhad Branch Islamic Azad University Mashhad Iran & Research Centerfor Animal Development Applied Biology Mashhad Branch Islamic Azad University Mashhad 917568 Iran Chemistry Department University of Birjand Birjand Iran

Using density functional theory, noncovalent interactions and two mechanisms of covalent functionalization of drug carmustine with functionalized carbon nanotube（CNT） have been investigated. Quantum molecular descriptors of noncovalent configurations were studied. It was specified that binding of drug carmustine with functionalized CNT is thermodynamically suitable. NTCOOH and NTCOCl can bond to the NH group of carmustine through OH（COOH mechanism） and Cl（COCl mechanism） groups, respectively. The activation energies, activation enthalpies and activation Gibbs free energies of two pathways were calculated and compared with each other. The activation parameters related to COOH mechanism are higher than those related to COCl mechanism, and therefore COCl mechanism is suitable for covalent functionalization. COOH functionalized CNT（NTCOOH） has more binding energy than COCl functionalized CNT（NTCOCl） and can act as a favorable system for carmustine drug delivery within biological and chemical systems（noncovalent）. These results could be generalized to other similar drugs.

关键词： carmustine, covalent and noncovalent adsorption, functionalized carbon nanotubes, quantum molecular descriptors, reaction mechanisms

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