Refine
Year of publication
Document Type
- Conference Proceeding (608)
- Article (356)
- Other Publications (136)
- Part of a Book (135)
- Book (69)
- Doctoral Thesis (52)
- Working Paper (40)
- Report (12)
- Patent (4)
- Preprint (2)
Language
- English (745)
- German (668)
- Multiple languages (7)
Has Fulltext
- no (1420) (remove)
Keywords
- (Strict) sign-regularity (1)
- 360-degree coverage (1)
- 3D Extended Object Tracking (EOT) (2)
- 3D Skelett Wickeltechnik (1)
- 3D ship detection (1)
- 3D urban planning (1)
- AAL (3)
- ADAM (1)
- AHI (1)
- ASEAN (1)
Institute
- Fakultät Architektur und Gestaltung (14)
- Fakultät Bauingenieurwesen (28)
- Fakultät Elektrotechnik und Informationstechnik (11)
- Fakultät Informatik (62)
- Fakultät Maschinenbau (27)
- Fakultät Wirtschafts-, Kultur- und Rechtswissenschaften (66)
- Institut für Angewandte Forschung - IAF (71)
- Institut für Naturwissenschaften und Mathematik - INM (1)
- Institut für Optische Systeme - IOS (26)
- Institut für Strategische Innovation und Technologiemanagement - IST (58)
A real matrix is called totally nonnegative if all of its minors are nonnegative. In this paper, the minors are determined from which the maximum allowable entry perturbation of a totally nonnegative matrix can be found, such that the perturbed matrix remains totally nonnegative. Also, the total nonnegativity of the first and second subdirect sum of two totally nonnegative matrices is considered.
In this paper totally nonnegative (positive) matrices are considered which are matrices having all their minors nonnegative (positve); the almost totally positive matrices form a class between the totally nonnegative matrices and the totally positive ones. An efficient determinantal test based on the Cauchon algorithm for checking a given matrix for falling in one of these three classes of matrices is applied to matrices which are related to roots of polynomials and poles of rational functions, specifically the Hankel matrix associated with the Laurent series at infinity of a rational function and matrices of Hurwitz type associated with polynomials. In both cases it is concluded from properties of one or two finite sections of the infinite matrix that the infinite matrix itself has these or related properties. Then the results are applied to derive a sufficient condition for the Hurwitz stability of an interval family of polynomials. Finally, interval problems for a subclass of the rational functions, viz. R-functions, are investigated. These problems include invariance of exclusively positive poles and exclusively negative roots in the presence of variation of the coefficients of the polynomials within given intervals.
This work investigates data compression algorithms for applications in non-volatile flash memories. The main goal of the data compression is to minimize the amount of user data such that the redundancy of the error correction coding can be increased and the reliability of the error correction can be improved. A compression algorithm is proposed that combines a modified move-to-front algorithm with Huffman coding. The proposed data compression algorithm has low complexity, but provides a compression gain comparable to the Lempel-Ziv-Welch algorithm.
Let A = [a_ij] be a real symmetric matrix. If f:(0,oo)-->[0,oo) is a Bernstein function, a sufficient condition for the matrix [f(a_ij)] to have only one positive eigenvalue is presented. By using this result, new results for a symmetric matrix with exactly one positive eigenvalue, e.g., properties of its Hadamard powers, are derived.
In this thesis, the recognition problem and the properties of eigenvalues and eigenvectors of matrices which are strictly sign-regular of a given order, i.e., matrices whose minors of a given order have the same strict sign, are considered. The results are extended to matrices which are sign-regular of a given order, i.e., matrices whose minors of a given order have the same sign or are allowed to vanish. As a generalization, a new type of matrices called oscillatory of a specific order, are introduced. Furthermore, the properties for this type are investigated. Also, same applications to dynamic systems are given.