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粉末冶金制备Al2024/SiC功能梯度复合材料的显微组织表征和力学性能（英文）

transactions of Nonferrous Metals Society of China 2015年第11期25卷 3569-3577页

作者： F.ERDEMIR A.CANAKCI t.varol Department of Metallurgical and Materials Engineering Engineering FacultyKaradeniz Technical University

采用粉末冶金和热压技术制备了不同梯度层数和不同SiC含量的Al2024/SiC功能梯度材料。研究了梯度层数和SiC含量对Al2024/SiC功能梯度材料显微组织和力学性能的影响。XRD和SEM-EDX分析表明Al和SiC为复合材料的主要成分,同时还有Al_4C_3、... 详细信息

采用粉末冶金和热压技术制备了不同梯度层数和不同SiC含量的Al2024/SiC功能梯度材料。研究了梯度层数和SiC含量对Al2024/SiC功能梯度材料显微组织和力学性能的影响。XRD和SEM-EDX分析表明Al和SiC为复合材料的主要成分,同时还有Al_4C_3、CuAl_2和CuMgAl_2等其他成分。表层含有40%SiC的两层Al2024/SiC功能梯度材料具有最高的抗弯强度,为1400 MPa。显微硬度的降低和孔隙率的变化与SiC含量和金属间化合物的形成有关。结果表明,显微硬度的增加和金属间化合物的形成对复合材料力学性能的提高起重要作用。

关键词： Al2024/SiC复合材料功能梯度材料金属间化合物显微硬度粉末冶金

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Investigating the surface integrity of aluminium based composites machined by EDM

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Defence technology（防务技术） 2019年第3期15卷 338-343页

作者： S.Suresh Kumar M.Uthayakumar S.thirumalai Kumaran temel varol Aykut Canakci Faculty of Mechanical Engineering Kalasalingam University Krishnankoil 626126 India Materials and Metallurgy Department Karadeniz Technical University Turkey

In the present work, the surface characteristics of Electrical Discharge Machined (EDM) Al (6351)eSiC and Al (6351)eSiCeB4C composites are investigated. the composites are prepared by employing the conventional stir casting technique, as it can produce better particle dispersion in the matrix. the detailed experimental study is performed on the composites by varying current (I), duty factor (t), pulse on time (ton), and the gap voltage (V) in order to analyze the Heat Affected Zone (HAZ) formed in the sub surface and the average crater diameter formed on the machined surface of the composites as an output function. the formation of recast layers, presence of bubbles and the surface texture of the composites at various machining conditions are observed. the results show that the increased Metal Removal Rate (MRR) increases the depth of HAZ and the average crater diameter on the machined area. Further, the addition of B4C particles to the composite produces more surface defect than the AleSiC composite.

关键词： Composites EDM Surface Crater HAZ

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Association of inflammation with atrial fibrillation in hyperthyroidism

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Journal of Geriatric Cardiology 2012年第4期9卷 344-348页

作者： Mehmet Ozaydin Ali Kutlucan Yasin turker Banu Koroglu Akif Arslan Bayram A. Uysal Dogan Erdogan Ercan varol Abdullah Dogan Department of Cardiology Suleyman Demirel University Kurtulus Mah 122. cad. Hatice Halici apt. no: 126 32040 Isparta Turkey Department of Internal Medicine Gulkent Hospital Atatürk Blv 10432 32200 Sanayi Isparta Turkey Department of Cardiology Gulkent Hospital Atatürk Blv 10432 32200 Sanayi Isparta Turkey

the aim of this studywas to evaluate the relationship between inflammation and development of atrial fibrillation (AF) in patients with *** A total of 65 patients with newly diagnosed hyperthyroidism, 35 of whom were in sinus rhythm and 30 of whom in AF. thirty five age- and gender-matched patients in a control group were included in the study. Factors associated with the development of AF were evaluated by multivariate regression analysis. Results Factors associated with AF in multivariate analysis included high sensitivity C reactive protein (HsCRP) [odds ratio (OR): 11.19; 95% confidence interval (95% CI): 1.80–69.53; P = 0.003],free t4 (OR: 8.76; 95% CI: 2.09–36.7; P = 0.003), and left atrial diameter (OR: 1.25; 95% CI: 1.06–1.47; P = 0.008). Conclusions the results of the present study suggest that HsCRP, an indicator of inflammation, free t4 and left atrial diameter are associated with the development AF in patients with hyperthyroidism.

关键词： Atrial fibrillation Hyperthyroidism Inflammation

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the Effect of Human Immunodeficiency Virus-1 Infection on Low Birth Weight, Mother to Child HIV transmission and Infants’ Death in African Area

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Open Journal of Obstetrics and Gynecology 2019年第2期9卷 158-169页

作者： traoré Youssouf téguété Ibrahima Dicko Fatoumata traoré Bocoum Amadou Fané Seydou traoré tidiani traoré Mamadou Salia Dao Seydou touré Moustapha varol Nesrin Dolo Amadou Department of Gynaecology and Obstétrics Gabriel TOURE Teaching Hospital Bamako Mali Department of Pediatics Gabriel TOURE Teaching Hospital Bamako Mali Department of Gynaecology and Obstétrics Regional Hospital of Segou Bamako Mali Department of Gynaecology and Obstétrics Point G Teaching Hospital Bamako Mali Motherhood Unit of “Csref Commune II” Bamako Mali Department of Gynaecology and Obstétrics “Hopital du Mali” Teaching Hospital Bamako Mali Sydney Gynaecology & Endometriosis Centre Sydney Medical School The University of Sydney Sydney Australia

Background: It is yet a controversy subject whether low birth weight and infant death are associated to human immunodeficiency virus-1 infection. Objective: to appreciate association between low birth weights, mother to child HIV transmission and infant mortality in HIV-1 infected pregnant women delivering between 2011 and 2016. Materials: We conducted 6 years cohort study in urban Mali. Outcome included preterm delivery, small for gestational age, infant survival status and HIV transmission. Comparison concerned women clinical WHO stage, mother viro-immunological status, and newborn anthropometric parameters. Results: HIV-1 infected women who delivered low birth weight newborn were 20.9% (111/531) versus 16.5% (1910/11.546) in HIV negative patients (p = 0.016). CD4 t cell counts low than 350 t cells count were strongly associated to LBW (p = 0.000;RR = 3.03;95% CI [1.89 - 3.16]). there is no significant association between ARt that was initiated during pregnancy (p = 0.061, RR = 0.02;CI 95% (1.02 - 1.99)) or during delivery (p = 0.571;RR = 1.01;CI 95% (0.10 - 3.02)) and LBW delivery. In multivariate analysis ARt regimens containing protease inhibitor (PI) were lone regimens associated with LBW ((p = 0.030;RR = 1.001;95% confidence interval [1.28 - 3.80]). Very low birth weight was statistically associated to women HIV infection (adjusted relative risk, 2.02;p = 0.000;95% confidence interval (2.17 - 4.10)). there is no significant difference between mother to child HIV transmission rate in the two HIV-infected pregnant women (10 infected children in group 2: MtCt rate 4.5%) and 3 infected children in group 1 (MtCt rate: 2.7%) (p = 0.56;RR, 0.59;CI 95% (0.18 - 4.39)). In multivariate analysis, LBW was associated with infant death (p = 0.001;RR = 2.04;CI 95% [1.04 - 5.05]). the median weight of infant at the moment of death in group 1 was 851 g (IQR: 520 - 1833 g). Significant relationship was found between infant death among LBW newborn with mother WHO stage 2 (p = 0

关键词： Low Birth Weight Human Immunodeficiency Virus Infection Mother to Child transmission Newborn Death Mali

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Performance and calibration of quark/gluon-jet taggers using 140 fb^(-1) of pp collisions at √s=13 teV with the AtLAS detector

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Chinese Physics C 2024年第2期48卷 1-25页

作者： G. Aad B. Abbott K. Abeling N.J. Abicht S.H. Abidi A. Aboulhorma H. Abramowicz H. Abreu Y. Abulaiti B.S. Acharya C. Adam Bourdarios L. Adamczyk S.V. Addepalli M.J. Addison J. Adelman A. Adiguzel t. Adye A.A. Affolder Y. Afik M.N. Agaras J. Agarwala A. Aggarwal C. Agheorghiesei A. Ahmad F. Ahmadov W.S. Ahmed S. Ahuja X. Ai G. Aielli A. Aikot M. Ait tamlihat B. Aitbenchikh I. Aizenberg M. Akbiyik t.P.A. Åkesson A.V. Akimov D. Akiyama N.N. Akolkar K. Al Khoury G.L. Alberghi J. Albert P. Albicocco G.L. Albouy S. Alderweireldt M. Aleksa I.N. Aleksandrov C. Alexa t. Alexopoulos F. Alfonsi M. Algren M. Alhroob B. Ali H.M.J. Ali S. Ali S.W. Alibocus M. Aliev G. Alimonti W. Alkakhi C. Allaire B.M.M. Allbrooke J.F. Allen C.A. Allendes Flores P.P. Allport A. Aloisio F. Alonso C. Alpigiani M. Alvarez Estevez A. Alvarez Fernandez M. Alves Cardoso M.G. Alviggi M. Aly Y. Amaral Coutinho A. Ambler C. Amelung M. Amerl C.G. Ames D. Amidei S.P. Amor Dos Santos K.R. Amos V. Ananiev C. Anastopoulos t. Andeen J.K. Anders S.Y. Andrean A. Andreazza S. Angelidakis A. Angerami A.V. Anisenkov A. Annovi C. Antel M.t. Anthony E. Antipov M. Antonelli F. Anulli M. Aoki t. Aoki J.A. Aparisi Pozo M.A. Aparo L. Aperio Bella C. Appelt A. Apyan N. Aranzabal S.J. Arbiol Val C. Arcangeletti A.t.H. Arce E. Arena J-F. Arguin S. Argyropoulos J.-H. Arling O. Arnaez H. Arnold G. Artoni H. Asada K. Asai S. Asai N.A. Asbah J. Assahsah K. Assamagan R. Astalos S. Atashi R.J. Atkin M. Atkinson H. Atmani P.A. Atmasiddha K. Augsten S. Auricchio A.D. Auriol V.A. Austrup G. Avolio K. Axiotis G. Azuelos D. Babal H. Bachacou K. Bachas A. Bachiu F. Backman A. Badea P. Bagnaia M. Bahmani A.J. Bailey V.R. Bailey J.t. Baines L. Baines O.K. Baker E. Bakos D. Bakshi Gupta V. Balakrishnan R. Balasubramanian E.M. Baldin P. Balek E. Ballabene F. Balli L.M. Baltes W.K. Balunas J. Balz E. Banas M. Bandieramonte A. Bandyopadhyay S. Bansal L. Barak M. Barakat E.L. Barberio D. Barberis M. Barbero M.Z. Barel K.N. Barends t. Barillari M-S. Barisits t. Barklow P. Baron D.A. Baron Mo the AtLAS Collaboration

the identification of jets originating from quarks and gluons,often referred to as quark/gluon tagging,plays an important role in various analyses performed at the Large Hadron Collider,as Standard Model measurements and searches for new particles decaying to quarks often rely on suppressing a large gluon-induced *** paper describes the measurement of the efficiencies of quark/gluon taggers developed within the AtLAS Collaboration,using √s=13 teV proton–proton collision data with an integrated luminosity of 140 fb^(-1) collected by the AtLAS *** taggers with high performances in rejecting jets from gluon over jets from quarks are studied:one tagger is based on requirements on the number of inner-detector tracks associated with the jet,and the other combines several jet substructure observables using a boosted decision tree.A method is established to determine the quark/gluon fraction in data,by using quark/gluon-enriched subsamples defined by the jet *** in tagging efficiency between data and simulation are provided for jets with transverse momentum between 500 GeV and 2 teV and for multiple tagger working points.

关键词： AtLAS JEt QUARK GLUON tAGGING

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