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Disturbance Evaluation in Power System Based on machine Learning

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Computers, materials & Continua 2022年第4期71卷 231-254页

作者： Emad m.Ahmed mohamed A.Ahmed ziad m.ali Imran Khan Department of Electrical Engineering College of EngineeringJouf UniversitySakaka72388Al-JoufSaudi Arabia Department of Electrical Engineering College of EngineeringPrince Sattam bin Abdulaziz UniversityWadi Addawaser11991Saudi Arabia Department of Electrical Engineering Aswan Faculty of EngineeringAswan UniversityAswan81542Egypt Department of Electrical Engineering University of Engineering and Technology PeshawarPakistan

The operation complexity of the distribution system increases as a large number of distributed generators(DG)and electric vehicles were introduced,resulting in higher demands for fast online reactive power *** a power system,the characteristic selection criteria for power quality disturbance classification are not *** classification effect and efficiency needs to be improved,as does the generalization *** order to categorize the quality in the power signal disturbance,this paper proposes a multi-layer severe learning computer auto-encoder to optimize the input weights and extract the characteristics of electric power quality ***,a multi-label classification algorithm based on rating is proposed to understand the relationship between the labels and identify the various power quality *** two algorithms are combined to construct a multi-label classification model based on a multi-level extreme learning machine,and the optimal network structure of the multi-level extreme learning machine as well as the optimal multi-label classification threshold are *** proposed method can be used to classify the single and compound power quality disturbances with improved classification effect,reliability,robustness,and anti-noise performance,according to the experimental *** hamming loss obtained by the proposed algorithm is about 0.17 whereas mL-RBF,SVm and mL-KNN schemes have 0.28,0.23 and 0.22 respectively at a noise intensity of 20 *** average precision obtained by the proposed algorithm 0.85 whereas the mL-RBF,SVm and mL-KNN schemes indicates 0.7,0.77 and 0.78 respectively.

关键词： Optimal power flow optimization algorithm deep learning power systems

An Optimized Algorithm for Renewable Energy Forecasting Based on machine Learning

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Intelligent Automation & Soft Computing 2023年第1期35卷 755-767页

作者： ziad m.ali Ahmed m.Galal Salem Alkhalaf Imran Khan College of Engineering at Wadi Addawaser Prince Sattam bin Abdulaziz UniversityWadi Aldawaser11991Saudi Arabia Electrical Engineering Department Aswan Faculty of EngineeringAswan UniversityAswan81542Egypt Production Engineering and mechanical Design Department Faculty of EngineeringMansoura UniversityMansoura35516Egypt Department of Computer College of Science and Arts in Ar RassQassim UniversityAr RassSaudi Arabia Department of Electrical Engineering University of Engineering and TechnologyPeshawar814Pakistan

The large-scale application of renewable energy power generation technology brings new challenges to the operation of traditional power grids andenergy management on the load side. microgrid can effectively solve this problemby using its regulation and flexibility, and is considered to be an ideal *** traditional method of computing total transfer capability is difficult due tothe central integration of wind farms. As a result, the differential evolutionextreme learning machine is offered as a data mining approach for extractingoperating rules for the total transfer capability of tie-lines in wind-integratedpower systems. K-medoids clustering under the two-dimensional “wind power-load consumption” feature space is used to define representative operational scenarios initially. Then, using stochastic sampling and repetitive power flow, aknowledge base for total transfer capability operating rule mining is ***, a novel method is used to filter redundant characteristics and find featuresthat are closely associated to the total transfer capability in order to decrease theultra-high dimensionality of operational features. Finally, by feeding the trainingdata into the proposed algorithm, the total transfer capability operation rules arederived from the knowledge base. It can be seen that, the proposed algorithmcan optimize the system performance with good accuracy and generality, according to numerical data.

关键词： Load forecasting distribution network machine learning renewable energy

A review on the mechanisms of low salinity water/surfactant/nanoparticles and the potential synergistic application for c-EOR

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Petroleum Research 2023年第3期8卷 324-337页

作者： Stanley Sim Sze Lim Henry Elochukwu Jobrun Nandong ziad Bennour mohamed ali Hamid Chemical and Energy Department Faculty of Engineering and ScienceCurtin University MalaysiaMalaysia School of Engineering and Physical Sciences Heriot Watt UniversityMalaysia

Chemical enhanced oil recovery(c-EOR)is a conventional and promising strategy to recover oil from reservoir techniques such as low salinity water flooding(LSWF),surfactant flooding,alkaline flooding,polymers flooding,and nanofluid *** use of various types of chemical materials for c-EOR method has recently attracted the attention of the oil and gas *** primary objective of this review work is to explore the synergy of low salinity water/surfactant/nanoparticle flooding for effective c-EOR method and investigate the mechanism behind these *** advantages of combining these chemical materials for c-EOR methods is also *** and limitations of this synergy and their economic feasibility for additional oil recovery and potential return on investment are *** have been successfully used in various applications in several industries and have also shown good application for EOR in terms of wettability *** contributes to wettability alteration,while surfactant contributes to wettability alteration and interfacial tension(IFT)***,fines migration caused by LSWF and nanoparticle agglomeration can cause formation damage,while excessive surfactant adsorption can lead to cost overrun on surfactant *** the characteristics of reservoir formation mineralogy and appropriate nanoparticle type,size,and concentration can be used to resolve this *** synergy of LSWF and nanoparticles in alkaline medium can serve as sacrificial agent to reduce excessive surfactant ***,the appropriate synergistic formulation of LSFW/surfactant/nanoparticle can improve additional oil recovery and support return on investment for c-EOR projects.

关键词： Surfactant Low salinity water Nanoparticles Nanofluid Enhanced oil recovery

middle East respiratory syndrome coronavirus： current situation and travel-associated concerns

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Frontiers of medicine 2016年第2期10卷 111-119页

作者： Jaffar A. Al-Tawfiq ali S. Omrani ziad A. memish johns Hopkins Aramco Healthcare Dhahran 31311 Kingdom of Saudi Arabia Indiana University School of medicine Indianapolis IN 46202-3082 USA Department of medicine Section of Infectious Diseases King Faisal Specialist Hospital and Research Centre Riyadh 11211 Kingdom of Saudi Arabia ministry of Health Riyadh 11514 Kingdom of Saudi Arabia College of medicine Alfaisal University Riyadh 11533 Kingdom of Saudi Arabia

The emergence of middle East respiratory syndrome coronavirus （mERS-CoV） in 2012 brought back memories of the occurrence of severe acute respiratory syndrome coronavirus （SARS-CoV） in 2002. more than 1500 mERS-CoV cases were recorded in 42 months with a case fatality rate （CFR） of 40%. meanwhile, 8000 cases of SARS-CoV were confirmed in six months with a CFR of 10%. The clinical presentation of mERS-CoV ranges from mild and non-specific presentation to progressive and severe pneumonia. No predictive signs or symptoms exist to differentiate mERS-CoV from community-acquired pneumonia in hospitalized patients. An apparent heterogeneity was observed in transmission. most mERS-CoV cases were secondary to large outbreaks in healthcare settings. These cases were secondary to community-acquired cases, which may also cause family outbreaks. Travel-associated mERS infection remains low. However, the virus exhibited a clear tendency to cause large outbreaks outside the Arabian Peninsula as exemplified by the outbreak in the Republic of Korea. In this review, we summarize the current knowledge about mERS-CoV and highlight travel-related issues.

关键词： coronavirus mERS middle East respiratory syndrome

Age as a predictor of clinical outcomes and determinant of therapeutic measures for emergency medical services treated cardiogenic shock

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Journal of Geriatric Cardiology 2023年第1期20卷 1-10页

作者： Xiaoman Xiao Jason E Bloom Emily Andrew Luke P Dawson ziad Nehme michael Stephenson David Anderson Himawan Fernando Samer Noaman Shelley Cox William Chan David m Kaye Karen Smith Dion Stub Department of Cardiology Alfred Health55 Commercial RoadMelbourneAustralia Baker Heart and Diabetes Institute 75 Commercial RoadMelbourneAustralia Department of Cardiology Western HealthFurlong RoadSt AlbansAustralia Ambulance Victoria 31 Joseph StreetBlackburnAustralia School of Public Health and Preventive medicine Monash University553 St Kilda RoadMelbourneAustralia Department of Paramedicine Monash UniversityMcMahons RoadFrankstonAustralia

BACKGROUND The impact of age on outcomes in cardiogenic shock(CS)is poorly described in the pre-hospital *** assessed the impact of age on outcomes of patients treated by emergency medical services(EmS).mETHODS This population-based cohort study included consecutive adult patients with CS transported to hospital by *** linked patients were stratified into tertiles by age(18-63,64-77,and>77 years).Predictors of 30-day mortality were assessed through regression *** primary outcome was 30-day all-cause *** A total of 3523 patients with CS were successfully linked to state health *** average age was 68±16 years and 1398(40%)were *** patients were more likely to have comorbidities including pre-existing coronary artery disease,hypertension,dyslipidemia,diabetes mellitus,and cerebrovascular *** incidence of CS was significantly greater with increasing age(incidence rate per 100,000 person years 6.47[95%CI:6.1-6.8]in age 18-63 years,34.34[32.4-36.4]in age 64-77 years,74.87[70.6-79.3]in age>77 years,Pmortality with increasing age *** adjustment,compared to the lowest age tertile,patients aged>77 years had increased risk of 30-day mortality(adjusted hazard ratio=2.26[95%CI:1.96-2.60]).Older patients were less likely to receive inpatient coronary *** Older patients with EmS-treated CS have significantly higher rates of short-term *** reduced rates of invasive interventions in older patients underscore the need for further development of systems of care to improve outcomes for this patient group.

关键词： assessed services shock

Comparative effectiveness of i-SCAN^(Tm) and high-definition white light characterizing small colonic polyps

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World Journal of Gastroenterology 2012年第41期18卷 5905-5911页

作者： Johanna L Chan Li Lin michael Feiler Andrew I Wolf Diana m Cardona ziad F Gellad Department of medicine Duke University Medical CenterDurham NC 27705 United States Duke Clinical Research Institute DurhamNC 27705 United States Department of Pathology Duke UniversityMedical Center Durham NC 27705 United States Durham VA medical Center Durham NC 27705United States

AIm:To evaluate accuracy of in vivo diagnosis of adenomatous vs non-adenomatous polyps using i-SCAN digital chromoendoscopy compared with high-definition white ***:This is a single-center comparative effectiveness pilot ***(n = 103) from 75 averagerisk adult outpatients undergoing screening or surveillance colonoscopy between December 1,2010 and April 1,2011 were evaluated by two participating endoscopists in an academic outpatient endoscopy *** were evaluated both with high-definition white light and with i-SCAN to make an in vivo prediction of adenomatous vs non-adenomatous *** determined diagnostic characteristics of i-SCAN and highdefinition white light,including sensitivity,specificity,and accuracy,with regards to identifying adenomatous vs non-adenomatous *** diagnosis was the gold standard ***:One hundred and three small polyps,detected from forty-three patients,were included in the *** average size of the polyps evaluated in the analysis was 3.7 mm(SD 1.3 mm,range 2 mm to 8 mm).Formal histopathology revealed that 54/103(52.4%) were adenomas,26/103(25.2%) were hyperplastic,and 23/103(22.3%) were other diagnoses include "lymphoid aggregates","non-specific colitis," and "no pathologic diagnosis." Overall,the combined accuracy of endoscopists for predicting adenomas was identical between i-SCAN(71.8%,95%CI:62.1%-80.3%) and high-definition white light(71.8%,95%CI:62.1%-80.3%).However,the accuracy of each endoscopist differed substantially,where endoscopist A demonstrated 63.0% overall accuracy(95%CI:50.9%-74.0%) as compared with endoscopist B demonstrating 93.3% overall accuracy(95%CI:77.9%-99.2%),irrespective of imaging *** endoscopist demonstrated a significant learning effect with i-SCAN during the *** endoscopist A increased accuracy using i-SCAN from 59%(95%CI:42.1%-74.4%) in the first half to 67.6%(95%CI:49.5%-82.6%) in the second half,and endoscopist B de

关键词：数字高清晰度结肠镜白光病理组织学诊断肉效益特征平均风险

Statistical Analysis of Groundwater Quality Parameters for Harrana and Azraq Basins, Jordan

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Journal of Geoscience and Environment Protection 2020年第10期8卷 242-261页

作者： ali m. Obeidat Omar Rimawi ziad S. Abu-Hamatteh Department of Geology The University of Jordan Amman Jordan Civil Engineering Department Faculty of Engineering Technology Al-Balqa Applied University Amman Jordan

Groundwater quality parameter (Ca2+, mg2+, Na+, K+, Cl, SO42−, HCO3−, NO3− , B, Fe, Sr, mn, Al, Ba, SiO2, pH, and BTEX) relationships of 36 wells from the Harrana area and 24 wells from Azraq area are examined to classify the wells water quality. Statistical analyses of the quality parameters have been conducted. Factor analyses are applied to extract five factors from the water quality parameters of Area 1;Factor 1 accounts for more than 38% of the variance among water quality. Cations including B, Na+, mg2+, and K+ with anions including Cl− and SOmal;">4mal;">2− were loaded significantly. It represents the variation in the geological formations penetrated by the wells. For Azraq wells, five factors were extracted. Factor 1 accounts for more than 50% of the variance in water quality. Six of water quality parameters were loaded on Factor 1. These parameters included cations represented by B, Na+, and mg2+ in addition to Cl− and SOmal;">4mal;">2− as anions. Cluster analysis classified the Harrana wells into three groups, i.e., cluster I included 26 wells with minimum mean con

关键词： Azraq Factor and Cluster Analysis Groundwater Harrana Water Quality Jordan

Effect of acid etching on marginal adaptation of mineral trioxide aggregate to apical dentin:microcomputed tomography and scanning electron microscopy analysis

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International Journal of Oral Science 2012年第4期4卷 202-207页

作者： Khalid Al-Fouzan ziad Al-Garawi Khalid Al-Hezaimi Fawad Javed Thakib Al-Shalan Ilan Rotstein Engineer Abdullah Bugshan Research Chair for Growth Factors and Bone Regeneration 3D Imaging and Biomechanical LaboratoryCollege of Applied Medical SciencesKing Saud University Division of Endodontics King Abdulaziz Medical CityNational Guard Hospital Dental Service Department Ministry of Interior Department of Periodontics and Community Dentistry College of DentistryKing Saud University Divisions of Endodontics Oral & Maxillofacial Surgery and OrthodonticsHerman Ostrow School of Dentistry of University of Southern California

The present investigation assessed the effect of acid etching on marginal adaptation of white- and gray-colored mineral trioxide aggregate （mTA） to apical dentin using microcomputed tomography （micro-CT） and scanning electron microscopy （SEm）. Sixty-four extracted single-rooted human maxillary teeth were used. Following root-end resection and apical preparation, the teeth were equally divided into four groups according to the following root end filling materials：（i） white-colored mTA （WmTA）, （ii） etched WmTA （EWmTA）, （iii） gray-colored mTA （GmTA） and （iv） etched GmTA （EGmTA）. After 48 h, the interface between root-end filling materials and the dentinal walls was assessed using micro-CT and SEm. Data were statistically analyzed using the KruskaI-Wallis and Dunn tests. micro-CT analysis revealed gap volumes between the apical cavity dentin walls and EGmTA, GmTA, EWmTA and WmTA of （0.007 1±0.004） mm3, （0.053±0.002） mm3, （0.003 6±0.001） mm3 and （0.005 9±0.002） mm3 respectively. SEm analysis revealed gap sizes for EGmTA, WmTA, EWmTA and GmTA to be （492.3±13.8） μm, （594.5±17.12）μm, （543.1±15.33） μm and （910.7±26.2）μm respectively. A significant difference in gap size between root end preparations filled with GmTA and EGmTA was found （P〈O.05）. No significance difference in gap size between WmTA and EWmTA were found in either SEm or micro-CT analysis. In conclusion, pre-etching of apical dentin can provide a better seal for GmTA but not for WmTA.

关键词： acid etching biocompatibility mineral trioxide aggregate root end filling

Alternative and Eco-Friendly Synthesis of Tetrakis(Aminomethyl)Calix-[4]-Resorcinarene

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International Journal of Organic Chemistry 2017年第4期7卷 403-411页

作者： S. ali moussaoui ziad Damaj moheddine Wehbie Stéphane Pellet Rostaing Iyad Karamé Department of Chemistry Laboratory of Catalysis Organometallic and Materiels LCOM Lebanese University Faculty of Sciences I Hadath Lebanon Institut de Chimie Séparative de marcoule ICSM UMR 5257 - CEA/CNRS/UM2/ENSCM Site de Marcoule Batiment 426 F-30207 Bagnols sur Cèse Cedex France

A cleaner and eco-friendly method was developed for the preparation of tetrakis(aminomethyl)calix-[4]-resorcinarene via a synthetic pathway of five steps starting from methylresorcinol. This alternative methodology is firstly based on avoiding the use of CH2BrCl, which is a non-eco-friendly substance with high ozone depletion potential, and on replacing it by CH2Cl2 as a readily available reagent with much less dangerous effects. Secondly, this method engages acetone or CH2Cl2 as the solvent of the bromination step in the place of the very toxic CCl4, leading to tetrakis(bromomethyl)calix-[4]-resorcinarene. The brominated intermediate has been reacted with sodium azide in acetone instead of the high-boiling solvent DmSO to produce tetrakis(azidomethyl) calix-[4]-resorcinarene without the need of tedious purification. Lastly, this work reports an efficient hydrogenation method of the versatile azido adduct employing Pt/C (5%) as the catalyst for the preparation of the amino cavitand as an alternative route with high atom economy that can replace the classical methods used currently.

关键词： Bridged Calix--Resorcinarene Eco-Friendly Synthesis Catalytic Hydrogenation Atom Economy Radical Substitution Nucleophilic Substitution CH2Cl2