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Evaluation of pitting corrosion of thixoformed A356 alloy using a simulation model

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Transactions of Nonferrous Metals Society of China 2010年第9期20卷 1702-1706页

作者： S.TAHAMTAN a.f ADAVI BOOSTANI Department of Materials Engineering Isfahan University of Technology (IUT)

Pitting behavior of thixoformed A356 alloy, with different reheating temperatures, was evaluated. Linear sweep voltammetric tests were used to study the pitting behavior of thixoformed, rheocast and gravity-cast A356 alloy in a 3.5% NaCl solution. A simulation method was also used in order to identify local galvanic corrosion current density between local galvanic couples. The results obtained show that the resistance to pitting corrosion of the thixoformed samples formed at 600 ℃ is higher than that of the samples formed at 610 ℃ as well as rheocast and gravity-cast samples. These results could be explained by morphological aspects of silicon phase as well as the area effect as related to galvanic corrosion between silicon particles and eutectic aluminum phase.

关键词： rheocasting gravity casting A356 alloy corrosion pitting pitting microstructure

Numerical simulation of the effect of the free carrier motilities on light-soaked a-Si:H p–i–n solar cell

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Journal of Semiconductors 2015年第7期36卷 59-68页

作者： L.Ayat a.f.bouhdjar Af.Meftah N.Sengouga Laboratory of Semiconductor Devices Physics Physics DepartmentUniversity of Béchar faculté des Sciences de la matière Laboratoire des Matériaux Semi-conducteurs et MétalliquesUniversité Mohammed Khider

Using a previous model, which was developed to describe the light-induced creation ofthe defect density in the a-Si：H gap states, we present in this work a computer simulation of the a-Si：H p-i-n solar cell behavior under continuous illumination. We have considered the simple case of a monochromatic light beam nonuniformly absorbed. As a consequence of this light-absorption profile, the increase of the dangling bond density is assumed to be inhomogeneous over the intrinsic layer （i-layer）. We investigate the internal variable profiles during illumination to understand in more detail the changes resulting from the light-induced degradation effect. Changes in the cell external parameters including the open circuit voltage, Voc, the short circuit current density, Jsc, the fill factor, ff, and the maximum power density, Pmax, are also presented. This shows, in addition, the free carrier mobility influence. The obtained results show that Voc seems to be the less a.fected parameter by the light-induced increase of the dangling bond density. Moreover, its degradation is very weak-sensitive to the free carrier mobility. finally, the free hole mobility effect is found to be more important than that of electrons in the improvement of the solar cell performance.

关键词： a-Si:H Staebler-Wronski effect defect pool model p-i-n

Behaviour of 4-(4-chlorophenyl)-6-(4-tolyl)-4,5-dihydro pyrimidine-2(1H)thione and 2-hydrazino derivative toward carbon electrophiles

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Chinese Journal of Chemistry 1991年第2期9卷 189-192页

作者： EL-HASHASH,M.A EL-KAfRAWY,a.f SHIBA,S.a.faculty of Science,Ain Shams University,Abbassia, Cairo.Egypt faculty of Science Ain Shams University Abbassia Cairo. Egypt

The reaction of thiourea with p-methyl-β-p-chlorophenyl acrylophenone(1)is,in princi- ple,an attractive[3+ 3]-fragment approach to the synthesis of dihydropyrimidine bearing aryl groups.

关键词： Behaviour of 4 chlorophenyl dihydro pyrimidine-2 thione and 2-hydrazino derivative toward carbon electrophiles tolyl

Unusual ovarian hyperstimulation syndrome presentation:Pleural effusion without ascites.A case report

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World Journal of Clinical Cases 2025年第8期13卷 26-34页

作者： Íngrid Solsona Sara Peralta Yasmina Barral francisco fàbregues Pepita Giménez-Bonafé Department of Physiological Sciences Physiology UnitFaculty of Medicine and Health SciencesBellvitge CampusUniversitat de BarcelonaIDIBELLBarcelona 08907CataloniaSpain Institut Clinic of Gynecology Obstetrics and NeonatologyHospital ClínicInstitut d'Investigacions Biomèdiques August Pi i SunyerFaculty of MedicineUniversity of BarcelonaBarcelona 08036CataloniaSpain Department of Physiological Sciences Faculty of Medicine and Health SciencesBellvitge CampusUniversitat de BarcelonaIDIBELLL'Hospitalet de Llobregat 08907BarcelonaSpain

BACKGROUND Ovarian hyperstimulation syndrome(OHSS)is a life-threatening complication that can occur in the luteal phase or early pregnancy after controlled ovarian *** case report highlights a unique manifestation of OHSS involving pleural effusion(PE)in a patient without identifiable risk *** SUMMARY A 39-year-old woman who underwent controlled ovarian hyperstimulation for an in vitro fertilization(IVf)cycle experienced dyspnea on the eleventh day of post oocyte *** diagnosis was severe OHSS with a unique manifestation of PE without *** management involved fluid balance and treatment with albumin,furosemide,thromboembolic prophylaxis,and thoracentesis.A continued drainage of the pleural cavity was *** patient had a.favo-rable outcome,and a dichorionic diamniotic gestation passed without *** OHSS and its potential complications can include respiratory distress and PE,as well as thromboembolic disorders.

关键词： Dyspnea Infertility In vitro fertilization Ovarian hyperstimulation syndrome Pleural effusion Thoracentesis Case report

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极限拍摄大冒险

小哥白尼（趣味科学） 2013年第6期 2-7页

作者： a.f V.B BBC

带上一幅100年来都未曾更新过的地图,登上俄罗斯的破冰船——哦,也许是老掉牙的"金羊毛"号——那艘首次穿越南极的小艇,再聚齐一大帮志同道合、勇敢又可爱的家伙,奔赴南极和北极的冰天雪地,完成跨越地球的极限拍摄!

关键词：熔岩湖金羊毛杰夫山烟着陆点就这样影像制作大卫保暖内衣下甲

Gut virome:New key players in the pathogenesis of inflammatory bowel disease

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World Journal of Methodology 2025年第2期15卷 27-43页

作者： Helal f Hetta Rehab Ahmed Yasmin N Ramadan Hayam fathy Mohammed Khorshid Mohamed M Mabrouk Mai Hashem Department of Medical Microbiology and Immunology Faculty of MedicineAssiut UniversityAssiut 71515Egypt Division of Microbiology Immunology and BiotechnologyFaculty of pharmacyUniversity of TabukTabuk 71491Saudi Arabia Division of Microbiology Immunology and BiotechnologyDepartment of Natural Products and Alternative MedicineFaculty of PharmacyUniversity of TabukTabuk 71491Saudi Arabia Department of Internal Medicine Division HepatogastroenterologyAssiut UniversityAssiut 71515Egypt Department of Clinical Research Egyptian Developers of Gastroenterology and Endoscopy FoundationCairo 11936Egypt Department of Internal Medicine Faculty of Medicine.Tanta UniversityTanta 31527Egypt Department of Tropical Medicine Gastroenterology and HepatologyAssiut University HospitalAssiut 71515Egypt

Inflammatory bowel disease(IBD)is a chronic inflammatory illness of the *** the mechanism underlying the pathogenesis of IBD is not fully under-stood,it is believed that a complex combination of host immunological response,environmental exposure,particularly the gut microbiota,and genetic suscept-ibility represents the major *** gut virome is a group of viruses found in great frequency in the gastrointestinal tract of *** gut virome varies greatly among individuals and is influenced by factors including lifestyle,diet,health and disease conditions,geography,and *** majority of research has focused on the significance of gut bacteria in the progression of IBD,although viral populations represent an important component of the *** conducted this review to highlight the viral communities in the gut and their expected roles in the etiopathogenesis of IBD regarding published research to date.

关键词： Inflammatory bowel disease Pathogenesis Gut virome Bacteriophage Eukaryotic viruses

Second-order optimality conditions f or minimizing a ma.function

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Science China Mathematics 2000年第7期43卷 722-733页

作者：黄力人 K.f.Ng Department of Mathematics South China Normal University Guangzhou 510631 China Department of Mathematics The Chinese University of Hong KongHong KongChina Correspondence should be addressed to K.F.Ng

We study Chaney's and Ben-Tal-Zowe's second-order directional derivatives with applications in minimization problem for max-functions of the formh(x): = max {f(x, τ); τ ∈T},where T is a compact metricspace. We impr... 详细信息

关键词： max-f unction sup-type function second-order optimality condition nonsmooth optimization.

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你的乌发散开在我头上

当代音乐 2018年第6期 172-174页

作者： a.f夏克[德](词) 梁宝忠(曲) 不详东莞理工学院教育学院(师范学院)

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估价师应关注的十二个特别问题(上)

估价师应关注的十二个特别问题(上)