维普中文期刊产品整合服务
15篇 您的检索式:作者名="Boscheri"
    题名 作者 年代 出处 被引量
1Correlation of heart- type fatty acid-binding protein with mortality and echocardio- graphic data in patients with pulmonary embolism at intermediate risk显示文摘Boscheri A Wunderlich C Langer M 2010Am Heart J2010,160,2:1
2Correlation of heart-type fatty acid-binding protein with mortahty and echocardiographic data in patients with pulmonary embolism at intermediate risk 显示文摘Boscheri A Wunderlich C Langer M Am Heart0,160,2:1
3Correlation of heart- type fatty acid-binding protein with mortality and echocardiographic data in patients with pulmonary embolism at intezanediate risk显示文摘Boscheri A Wunderlich C Langer M 2010Am Heart J2010,160,2:1
4Correlation of heart-type fatty acid-binding protein with mortality and echocardiographic data in patients with pulmonary embolism at intermediate risk显示文摘Boscheri A Wunderlich C Langer M 2010Am Heart J2010,160,2:1
5Correlation of hearttype fatty acid-binding protein with mortality and echocardiographic data in patients with pulmonary embolism at intermediate risk显示文摘Boscheri A Wunderlich C Langer M 2010Am Heart J2010,160,2:1
6Correlation of heart-type fatty acid–binding protein with mortality and echocardiographic data in patients with pulmonary embolism at intermediate risk显示文摘Alessandra Boscheri Carsten Wunderlich Martin Langer Steffen Schoen B?rbel Wiedemann Dirk Stolte Gesa Elmer Peggy Barthel Ruth H. Strasser 2010American Heart Journal2010,,2:1
7Incidence of aortic valvle regurgitation and outcome after percutaneous closure of atrial septal defects and patent foramen ovale显示文摘Schoen S P Boscheri A Lange S A 2008Heart2008,94,7:1
8Correlation of heart - type fatty acid - binding protein with mortality and echocardiographic data in patients with pulmonary embolism at intermediate risk 显示文摘BOSCHERI A WUNDERLICH C LANGER M 2010Am Heart J2010,160,2:1
9Pinewood nematode species complex: interbreeding potential and chromosome number 显示文摘BOLLA R I BOSCHERI M 1993Journal of Nematology1993,25,:1
10Correlation of heart- type fatty acid - binding protein with mortality and echocardiographic data in patients with pulmonary embolism at intermediate risk 显示文摘Boscheri A Wunderlich C Langer M 2010Am Heart J2010,160,2:1
11Correlation of heart- type fatty acid-binding protein with mortality and echocardiographic data in patients with pulmonary embolism at intermediate risk 显示文摘Boscheri A Wunderlich C Langer M 2010Am Heart J2010,160,2:1
12High Order Accurate Direct Arbitrary-Lagrangian-Eulerian ADER-MOOD Finite Volume Schemes for Non-Conservative Hyperbolic Systems with Stiff Source Terms显示文摘In this paper we present a 2D/3D high order accurate finite volume scheme in the context of direct Arbitrary-Lagrangian-Eulerian algorithms for general hyperbolic systems of partial differential equations with non-conservative products and stiff source terms.This scheme is constructed with a single stencil polynomial reconstruction operator,a one-step space-time ADER integration which is suitably designed for dealing even with stiff sources,a nodal solver with relaxation to determine the mesh motion,a path-conservative integration technique for the treatment of non-conservative products and an a posteriori stabilization procedure derived from the so-called Multidimensional Optimal Order Detection(MOOD)paradigm.In this work we consider the seven equation Baer-Nunziato model of compressible multi-phase flows as a representative model involving non-conservative products as well as relaxation source terms which are allowed to become stiff.The new scheme is validated against a set of test cases on 2D/3D unstructured moving meshes on parallel machines and the high order of accuracy achieved by the method is demonstrated by performing a numerical convergence study.Classical Riemann problems and explosion problems with exact solutions are simulated in 2D and 3D.The overall numerical code is also profiled to provide an estimate of the computational cost required by each component of the whole algorithm.Walter Boscheri Raphael Loubere 2017Communications in Computational Physics2017,21,1:0
13Curl Constraint-Preserving Reconstruction and the Guidance it Gives for Mimetic Scheme Design显示文摘Several important PDE systems,like magnetohydrodynamics and computational electrodynamics,are known to support involutions where the divergence of a vector field evolves in divergence-free or divergence constraint-preserving fashion.Recently,new classes of PDE systems have emerged for hyperelasticity,compressible multiphase flows,so-called firstorder reductions of the Einstein field equations,or a novel first-order hyperbolic reformulation of Schrödinger’s equation,to name a few,where the involution in the PDE supports curl-free or curl constraint-preserving evolution of a vector field.We study the problem of curl constraint-preserving reconstruction as it pertains to the design of mimetic finite volume(FV)WENO-like schemes for PDEs that support a curl-preserving involution.(Some insights into discontinuous Galerkin(DG)schemes are also drawn,though that is not the prime focus of this paper.)This is done for two-and three-dimensional structured mesh problems where we deliver closed form expressions for the reconstruction.The importance of multidimensional Riemann solvers in facilitating the design of such schemes is also documented.In two dimensions,a von Neumann analysis of structure-preserving WENOlike schemes that mimetically satisfy the curl constraints,is also presented.It shows the tremendous value of higher order WENO-like schemes in minimizing dissipation and dispersion for this class of problems.Numerical results are also presented to show that the edge-centered curl-preserving(ECCP)schemes meet their design accuracy.This paper is the first paper that invents non-linearly hybridized curl-preserving reconstruction and integrates it with higher order Godunov philosophy.By its very design,this paper is,therefore,intended to be forward-looking and to set the stage for future work on curl involution-constrained PDEs.Dinshaw S.Balsara Roger Käppeli Walter Boscheri Michael Dumbser 2023Communications on Applied Mathematics and Computation2023,5,1:0
14Lagrangian-Eulerian One-Step WENO Finite Volume Schemes on Unstructured Triangular Meshes显示文摘In this article we present a new class of high order accurate Arbitrary-Eulerian-Lagrangian(ALE)one-step WENO finite volume schemes for solving nonlinear hyperbolic systems of conservation laws on moving two dimensional unstructured triangular meshes.A WENO reconstruction algorithm is used to achieve high order accuracy in space and a high order one-step time discretization is achieved by using the local space-time Galerkin predictor proposed in[25].For that purpose,a new element-local weak formulation of the governing PDE is adopted on moving space-time elements.The space-time basis and test functions are obtained considering Lagrange interpolation polynomials passing through a predefined set of nodes.Moreover,a polynomial mapping defined by the same local space-time basis functions as the weak solution of the PDE is used to map the moving physical space-time element onto a space-time reference element.To maintain algorithmic simplicity,the final ALE one-step finite volume scheme uses moving triangular meshes with straight edges.This is possible in the ALE framework,which allows a local mesh velocity that is different from the local fluid velocity.We present numerical convergence rates for the schemes presented in this paper up to sixth order of accuracy in space and time and show some classical numerical test problems for the two-dimensional Euler equations of compressible gas dynamics.Walter Boscheri Michael Dumbser 2013Communications in Computational Physics2013,14,10:0
15Continuous Finite Element Subgrid Basis Functions for Discontinuous Galerkin Schemes on Unstructured Polygonal Voronoi Meshes显示文摘We propose a new high order accurate nodal discontinuous Galerkin(DG)method for the solution of nonlinear hyperbolic systems of partial differential equations(PDE)on unstructured polygonal Voronoi meshes.Rather than using classical polynomials of degree N inside each element,in our new approach the discrete solution is represented by piecewise continuous polynomials of degree N within each Voronoi element,using a continuous finite element basis defined on a subgrid inside each polygon.We call the resulting subgrid basis an agglomerated finite element(AFE)basis for the DG method on general polygons,since it is obtained by the agglomeration of the finite element basis functions associated with the subgrid triangles.The basis functions on each sub-triangle are defined,as usual,on a universal reference element,hence allowing to compute universal mass,flux and stiffness matrices for the subgrid triangles once and for all in a pre-processing stage for the reference element only.Consequently,the construction of an efficient quadrature-free algorithm is possible,despite the unstructured nature of the computational grid.High order of accuracy in time is achieved thanks to the ADER approach,making use of an element-local space-time Galerkin finite element predictor.The novel schemes are carefully validated against a set of typical benchmark problems for the compressible Euler and Navier-Stokes equations.The numerical results have been checked with reference solutions available in literature and also systematically compared,in terms of computational efficiency and accuracy,with those obtained by the corresponding modal DG version of the scheme.Walter Boscheri Michael Dumbser Elena Gaburro 2022Communications in Computational Physics2022,32,6:0
返回顶部 每页显示:
共1页 首页 上一页 第1页 下一页 末页 /1 跳转

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1 渝公网安备 50019002500403号 违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费