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PArTIAL rEGULArITY FOr OPTIMAL DESIGN PrOBLEMS INVOLVING BOTH BULK AND SUrFACE ENErGIES

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Chinese Annals of Mathematics,Series B 1999年第2期20卷 137-158页

作者： F.H.LIN r.V.KOHN CourantInstituteofMathematicalSciences USA projectsupportedbytheNationalNaturalScienceFoundationofUSA

This paper studies a class of variational problems which involving both bulk and surfaceenergies. The bulk energy is of Dirichlet type though it can be in very general forms allowingunknowns to be scalar or *** surface energy is an arbitrary elliptic parametric integralwhich is defined on a free interface. One also allows other constraints such as volumes of partitioning sets. One establishes the existence and regularity theory, in particular, the regularityof the free interface of such problems.

关键词： Partial regularity Optimal design problem Nonlinear variational problems

A New Calculation of rotational Bands in Alpha-Cluster Nuclei

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Communications in Theoretical Physics 2018年第7期69卷 67-70页

作者： N.roshanbakht M.r.Shojaei Department of Nuclear Physics Faculty of Physics and Nuclear Engineering Shahrood University of Technology

One of the cluster behaviors observed in light nuclei such as20 Ne and44 Ti is the presence of an alpha particle rotating around a double magic number core. In this work, a theoretical method is used for investigation of rotational spectra of two-particle cluster states. To this end, Deng-Fan potential in addition to Hellman potential is used as the core and cluster potential. Next, given the Wildermuth condition, and proper quantum numbers describing the relative motion of the alpha particle and core, the rotational levels of20 Ne and44 Ti isotopes are calculated. Our studies show that the results are in good agreement with the available data.

关键词： cluster model rotational band nuclear potential Wildermuth condition

Pulmonary artery catheterization in acute myocardial infarction complicated by cardiogenic shock:A review of contemporary literature

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World journal of Cardiology 2021年第12期13卷 720-732页

作者： Shiva P Ponamgi Muhammad Haisum Maqsood Pranathi r Sundaragiri Michael G DelCore Arun Kanmanthareddy Wissam A jaber William j Nicholson Saraschandra Vallabhajosyula Division of Cardiovascular Medicine Department of MedicineCreighton University School of MedicineOmahaNE 68154United States Department of Medicine Lincoln Medical Center/Cornell UniversityBronxNY 10451United States Department of Primary Care Internal Medicine Wake Forest Baptist HealthHigh PointNC 30260United States Section of Interventional Cardiology Division of Cardiovascular MedicineDepartment of MedicineEmory University School of MedicineAtlantaGA 30322United States Section of Cardiovascular Medicine Department of MedicineWake Forest University School of MedicineHigh PointNC 27262United States

Acute myocardial infarction(AMI)with left ventricular(LV)dysfunction patients,the most common cause of cardiogenic shock(CS),have acutely deteriorating hemodynamic *** frequent use of vasopressor and inotropic pharmacologic interventions along with mechanical circulatory support(MCS)in these patients necessitates invasive hemodynamic *** the pivotal Evaluation Study of Congestive Heart Failure and Pulmonary Artery Catheterization Effectiveness trial failed to show a significant improvement in clinical outcomes in shock patients managed with a pulmonary artery catheter(PAC),the use of PAC has become less popular in clinical *** this review,we summarize currently available literature to summarize the indications,clinical relevance,and recommendations for use of PAC in the setting of AMI-CS.

关键词： Pulmonary artery catheter Swan-ganz catheter Acute myocardial infarction Cardiogenic shock Hemodynamic monitoring Interventional cardiology Critical care cardiology

The challenge to improve the response of biomaterials to the physiological environment

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regenerative Biomaterials 2016年第2期3卷 67-71页

作者： Nicholas A.Peppas john r.Clegg McKetta Department of Chemical Engineering College of PharmacyUniversity of Texas at Austin Department of Biomedical Engineering College of PharmacyUniversity of Texas at Austin Institute for Biomaterials Drug Delivery and Regenerative MedicineCollege of PharmacyUniversity of Texas at Austin Department of Surgery and Perioperative Care Dell Medical SchoolCollege of PharmacyUniversity of Texas at Austin Division of Pharmaceutics College of PharmacyUniversity of Texas at Austin.

New applications of biomaterials often require advanced structures containing synthetic and natural components that are tuned to provide properties unique to a specific *** discuss how structural characteristics of biomaterials,especially hydrophilic ones,can be used in conjunction with non-ideal thermodynamics to develop advanced medical *** show a number of examples of biocompatible,intelligent biomaterials that can be used for organ replacement,biosensors,precise drug delivery over days or weeks,and regenerative medicine.

关键词： drug delivery nanobiomaterials regenerative mechanism materials structure

Influencing mechanism of pre-existing nanoscale Al5Fe2 phase on Mg-Fe interface in friction stir spot welded Al-free ZK60-Q235 joint

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journal of Materials Science & Technology 2020年第7期42卷 220-228页

作者： r.Z.Xu Q.Yang D.r.Ni B.L.Xiao C.Z.Liu Z.Y.Ma Institute of Metal research Chinese Academy of SciencesShenyang110016China College of Material Science and Engineering Shenyang Aerospace UniversityShenyang110136China Department of Materials Science and Engineering University of Illinois at Urbana-Champaign1304 W Green StUrbanaIL61801United States Fredrick Seitz Materials research Laboratory University of Illinois at Urbana-Champaign104 S Goodwin AveUrbanaIL61801United States

Al-free ZK60 magnesium (Mg) alloy sheet was selected as substrate material of Mg-steel pinless friction stir spot welding (FSSW), avoiding the effect of the Al element in the substrate on the alloying reaction of Mg-iron (Fe) interface. The sound FSSW joint of ZK60 Mg alloy and Q235 steel with a hot-dipped aluminum (Al)-containing zinc (Zn) coating was successfully realized. The detailed microstructural examinations proved that Al5Fe2 phase at the Mg-Fe interface came from the pre-existing Al5Fe2 phase in the coating and acted as the transition layer for promoting the metallurgical bonding of Mg and Fe. The interfaces with well-matched lattice sites among Fe, Al5Fe2 and Mg were formed during FSSW. A low energy interface with good match of lattice sites ((002)Al5Fe2//(110)Fe, [110]Al5Fe2//[113]Fe) between Al5Fe2 and Fe was identified. For the interface between Al5Fe2 and Mg, an orientation relationship of (622)Al5Fe2//(3112)Mgand[158]Al5Fe2//[2423]Mg was observed. The tensile-shear load of the ZK60-steel joint could reach 4.6 kN. Moreover, the joint fracture occurred at the interface between the Al5Fe2 layer and the Mg alloy substrate, suggesting the brittle fracture characteristic.

关键词： Dissimilar welding Friction stir spot welding Magnesium alloys Steels Zinc coating

Solid-State Metal Additive Manufacturing for Structural repair

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Accounts of Materials research 2021年第9期2卷 780-792页

作者： ryan B.Gottwald r.joey Griffiths Dylan T.Petersen Mackenzie E.j.Perry Hang Z.Yu Department of Materials Science and Engineering Virginia TechBlacksburgVirginia 24061United States

CONSPECTUS:Structural metal components play a vital role in a broad range of industries,from aerospace and automotive to infrastructure and *** service,these components can experience substantial wear,thermal fatigue,erosion,corrosion,or chemical reactions,resulting in significant surface or even volumetric *** of these components is often energy-intensive and economically *** repair,which aims to restore the original geometry while enabling good mechanical performance postrepair,can offset the costs *** on the additive capabilities and bonding mechanisms,structural repair technologies can be divided into four categories:nonadditive,nonmelting-based;nonadditive,melting-based;additive,nonmelting-based;additive,*** melting-based approaches can be applied to various repair geometries with good precision,the underlying melting and solidification processes inevitably lead to crucial problems impacting the mechanical performance,such as solidification porosity,high residual stresses,dendritic microstructure formation,elemental segregation,hot cracking,and stress corrosion *** fundamentally solve or minimize these problems,one may employ solid-state technologies that leverage ultrasonic vibration,friction stirring,or particle impact to facilitate metallurgical bond *** robust geometry restoration,an additive capability needs to be incorporated for continuous material feeding and precise deposition path ***,two solid-state technologies satisfy the requirement,cold spray and additive friction stir *** this Account,we discuss the structural repair enabled by solid-state metal additive manufacturing,focusing on(i)cold spray,which is a relatively established process,and(ii)additive friction stir deposition,which is an emerging process recently triggering significant research effortsthe authors are particularly invested in this process and are pioneering th

关键词： friction solidification corrosion

s-rEGULAr DIHEDrAL COVErINGS OF THE COMPLETE GrAPH OF OrDEr 4

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Chinese Annals of Mathematics,Series B 2004年第1期25卷 57-64页

作者： FENGYANQUAN j.H.KWAK DepartmentofMathematics NorthernJiaotongUniversityBeijing100044China CombinatorialandComputationalMathematicsCenter PohangUniversityofScienceandTechnologyPohang790-784Korea.

A graph is s-regular if its automorphism group acts regularly on the set of its s-arcs. An infinite family of cubic 1-regular graphs was constructed in [7] as cyclic coverings of the three-dimensional Hypercube, and a classification of all s-regular cyclic coverings of the complete bipartite graph of order 6 was given in [8] for each s ≥ 1, whose fibre-preserving automorphism subgroups act arc-transitively. In this paper, the authors classify all s-regular dihedral coverings of the complete graph of order 4 for each s ≥ 1, whose fibre-preserving automorphism subgroups act arc-transitively. As a result, a new infinite family of cubic 1-regular graphs is constructed.

关键词： s-regular graphs s-arc-transitive graphs regular coverings

OBSErVATION OF MYO-INOSITOL CONCENTrATIONS IN BIPOLAr DISOrDEr PATIENTS rECEIVING SODIUM VALPrOATE:An in vivo Proton Mr Spectroscopy Quantitative Study

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波谱学杂志 2002年第1期19卷 96-97页

作者： r.H.WU P.SILVErSTONE j.MA H.Kim H.B.rAO X.H.XU Shantou University Medical College China University of Alberta Canada University of Alberta Canada Dalian Medical University China Shantou University Medical College China

Introduction:Previous magnetic resonance spectroscopy (MrS) studies have suggested that lithium used in patients with bipolar disorder may alter brain myo-inositol concentrations.

关键词： Mr OBSErVATION OF MYO-INOSITOL CONCENTrATIONS IN BIPOLAr DISOrDEr PATIENTS rECEIVING SODIUM VALPrOATE MYO

Sun's Log-concavity Conjecture on the Catalan–Larcombe–French Sequence

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Acta Mathematica Sinica,English Series 2016年第5期32卷 553-558页

作者： james j.Y.ZHAO Center for Applied Mathematics Tianjin University

Let {Pn},n≥0 denote the Catalan-Larcombe-French sequence, which naturally came from the series expansion of the complete elliptic integral of the first kind. In this paper, we prove the strict log-concavity of the sequence { n√Pn}n≥1, which was originally conjectured by Z. W. Sun. We also obtain the strict log-concavity of the sequence {n√Vn}n≥1, where {Vn}n≥0 is the Fennessey-Larcombe- French sequence arising from the series expansion of the complete elliptic integral of the second kind.

关键词： The Catalan-Larcombe-French sequence the Fennessey-Larcombe-French sequence logconcavity three-term recurrence relation