Structure and structure-preserving algorithms for plasma physics

Structure and structure-preserving algorithms for plasma physics

Structure Preserving Integration Algorithms∗

Often in physics and engineering one encounters systems of differential equations that have a non-trivial dynamic or kinematic structure, e.g., the flow generated by such a system may satisfy one or more algebraic or differential constraints. Moreover, this structure is often of physical significance, embodying an important concept such as conservation of energy. Traditional numerical methods f...

Ela Structure Preserving Algorithms for Perplectic

Structured real canonical forms for matrices in Rn×n that are symmetric or skewsymmetric about the anti-diagonal as well as the main diagonal are presented, and Jacobi algorithms for solving the complete eigenproblem for three of these four classes of matrices are developed. Based on the direct solution of 4 × 4 subproblems constructed via quaternions, the algorithms calculate structured orthog...

Structure Preserving Algorithms for Perplectic Eigenproblems∗

Structured real canonical forms for matrices in Rn×n that are symmetric or skew-symmetric about the anti-diagonal as well as the main diagonal are presented, and Jacobi algorithms for solving the complete eigenproblem for three of these four classes of matrices are developed. Based on the direct solution of 4× 4 subproblems constructed via quaternions, the algorithms calculate structured orthog...

the underlying structure of language proficiency and the proficiency level

هدف از انجام این تخقیق بررسی رابطه احتمالی بین سطح مهارت زبان خارجی (foreign language proficiency) و ساختار مهارت زبان خارجی بود. تعداد 314 زبان آموز مونث و مذکر که عمدتا دانشجویان رشته های زبان انگلیسی در سطوح کارشناسی و کارشناسی ارشد بودند در این تحقیق شرکت کردند. از لحاظ سطح مهارت زبان خارجی شرکت کنندگان بسیار با هم متفاوت بودند، (75 نفر سطح پیشرفته، 113 نفر سطح متوسط، 126 سطح مقدماتی). کلا ...