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51篇 您的检索式:作者名="Alexander RG"
    题名 作者 年代 出处 被引量
1Impact of lattice relaxations on phase transitions in a high-entropy alloy studied by machine-learning potentials显示文摘Recently,high-entropy alloys(HEAs)have attracted wide attention due to their extraordinary materials properties.A main challenge in identifying new HEAs is the lack of efficient approaches for exploring their huge compositional space.Ab initio calculations have emerged as a powerful approach that complements experiment.However,for multicomponent alloys existing approaches suffer from the chemical complexity involved.In this work we propose a method for studying HEAs computationally.Our approach is based on the application of machine-learning potentials based on ab initio data in combination with Monte Carlo simulations.The high efficiency and performance of the approach are demonstrated on the prototype bcc NbMoTaW HEA.The approach is employed to study phase stability,phase transitions,and chemical short-range order.The importance of including local relaxation effects is revealed:they significantly stabilize single-phase formation of bcc NbMoTaW down to room temperature.Finally,a so-far unknown mechanism that drives chemical order due to atomic relaxation at ambient temperatures is discovered.Tatiana Kostiuchenko Fritz Körmann Jörg Neugebauer Alexander Shapeev 2019npj Computational Materials2019,,1:17
2Laparoscopic surgery for benign and malign diseases of the digestive system:Indications,limitations,and evidence显示文摘The laparoscopic technique was introduced in gastrointestinal surgery in the mid 1980s.Since then,the development of this technique has been extraordinary.Triggered by technical innovations(stapling devices or coagulation/dissecting devices),nowadays any type of gastrointestinal resection has been successfully performed laparoscopically and can be performed laparoscopically dependent on the patient’s condition.This summary gives an overview over 30 years of laparoscopic surgery with focus on today’s indications and evidence.Main indications remain the more common procedures,e.g.,appendectomy,cholecystectomy,bariatric procedures or colorectal resections.For all these indications,the laparoscopic approach has become the gold standard with less perioperative morbidity.Regarding oncological outcome there have been several highquality randomized controlled trials which demonstrated equivalency between laparoscopic and open colorectal resections.Less common procedures like esophagectomy,oncological gastrectomy,liver and pancreatic resections can be performed successfully as well by anexperienced surgeon.However,the evidence for these special indications is poor and a general recommendation cannot be given.In conclusion,laparoscopic surgery has revolutionized the field of gastrointestinal surgery by reducing perioperative morbidity without disregarding surgical principles especially in oncological surgery.Markus Alexander Küper Friederike Eisner Alfred K?nigsrainer J?rg Glatzle 2014World Journal of Gastroenterology2014,20,17:9
3FOLFIRI plus cetuximab versus FOLFIRI plus bevacizumab as first-line treatment for patients with metastatic colorectal cancer (FIRE-3): a randomised, open-label, phase 3 trial显示文摘Volker Heinemann Ludwig Fischer von Weikersthal Thomas Decker Alexander Kiani Ursula Vehling-Kaiser Salah-Eddin Al-Batran Tobias Heintges Christian Lerchenmüller Christoph Kahl Gernot Seipelt Frank Kullmann Martina Stauch Werner Scheithauer J?rg Hielscher 2014Lancet Oncology2014,,10:2
4Intraoperative laser fluorescence angiography in colorectal surgery: a noninvasive analysis to reduce the rate of anastomotic leakage显示文摘Stefanie Kudszus Christian Roesel Alexander Schachtrupp J?rg J. H?er 2010Langenbeck’s Archives of Surgery2010,,8:2
5Circulating microRNAs (miRNA) in Serum of Patients With Prostate Cancer显示文摘Robert Mahn Lukas C. Heukamp Sebastian Rogenhofer Alexander von Ruecker Stefan C. Müller J?rg Ellinger 2011Urology2011,,5:1
6He-paranase Expression in Primary and Metastatic Pancreatic Cancer显示文摘Alexander Koliopanos Helmut Friess J rg Kleeff 2001Cancer Research2001,61,12:1
7Differences in dental arch morphology among adult females with untreated Class Ⅰ and Class Ⅱ malocclusion 显示文摘Buschang PH J Stroud and RG Alexander 1994Eur J Orthod1994,16,1:1
8Surgical correction of the long-face syndromes显示文摘Bell WH Greekmore TD Alexander RG 1977Am J Orthod1977,71,:1
9Lip bumper therapy for gaining arch length显示文摘Nevant CT Buschang PH Alexander RG 1991Am J Orthod Dentofacial Orthop1991,100,3:1
10Long-term stability of combined rapid palatal expansion-lip bumper therapy foUowed by full fixed appliance 显示文摘Ferris T Alexander RG Boley J 2005AM J Orthod Dentofacial Orthop2005,128,3:1
11Congestive heart failure and left ventricular dysfunction complicating doxorubicin therapy: seven-year experience using serial radionuclide angiocardiography显示文摘Schwartz RG Mckenzie WB Alexander J etal 1987Am J Med1987,82,6:1
12Lip bumper therapy for gaining arch length显示文摘Nevant CT Buschang PH Alexander RG 1991Am J Orthod Dentofacial Orthop1991,100,4:1
13Decreased nitric oxide synthesis activity causes impaired endothelium-dependent relaxation in the postisehemia heart显示文摘Roberto RG Alexander P Yong X 1997J Bid Chem1997,272,21:1
14Omega-3 polyunsaturated fatty acids and cognition throughout the lifes- pan: a review 显示文摘KARR JE ALEXANDER JE WINNINGHAM RG 2011NutrNeurosci2011,14,5:1
15Diference in dental arch morphology among adult females with untreated Class I and Class II malocelusion显示文摘Buschang PH Stroud J Alexander RG 1994Am J Orthod1994,16,1:1
16Omega-3 polyun- saturated fatty acids and cognition throughout the lifespan:a review显示文摘Karr JE Alexander JE Winningham RG 2011Nutr Neurosci2011,14,5:1
17Treatment guidelines 显示文摘Alexander RG 2007Am J Orthod Dentofa- cial Orthop2007,131,6:1
18Lng-term stability of com- bined rapid palatal expansion-lip bumper therapy followed by full fixed appliances 显示文摘Fen'is T Alexander RG Boley J 2005Am J Orthod De ntofac Orthop2005,128,3:1
19The varisimplex discipline,PartⅠ,concepts and appliance design显示文摘Alexander RG 1983J Clin Orthop1983,17,:1
20Ab initio vibrational free energies including anharmonicity for multicomponent alloys显示文摘The unique and unanticipated properties of multiple principal component alloys have reinvigorated the field of alloy design and drawn strong interest across scientific disciplines.The vast compositional parameter space makes these alloys a unique area of exploration by means of computational design.However,as of now a method to compute efficiently,yet with high accuracy the thermodynamic properties of such alloys has been missing.One of the underlying reasons is the lack of accurate and efficient approaches to compute vibrational free energies—including anharmonicity—for these chemically complex multicomponent alloys.In this work,a density-functional-theory based approach to overcome this issue is developed based on a combination of thermodynamic integration and a machine-learning potential.We demonstrate the performance of the approach by computing the anharmonic free energy of the prototypical five-component VNbMoTaW refractory high entropy alloy.Blazej Grabowski Yuji Ikeda Prashanth Srinivasan Fritz Körmann Christoph Freysoldt Andrew Ian Duff Alexander Shapeev Jörg Neugebauer 2019npj Computational Materials2019,,1:1
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