All

What are you looking for?

All
Projects
Results
Organizations

Quick search

  • Projects supported by TA ČR
  • Excellent projects
  • Projects with the highest public support
  • Current projects

Smart search

  • That is how I find a specific +word
  • That is how I leave the -word out of the results
  • “That is how I can find the whole phrase”
EN
ČeštinaEnglish

Filters

108 415 (0,339s) •

Result

Sign patterns of J-orthogonal matrices

and Rozloznik. A number of further generalnresults on the sign patterns of the J-orthogonal matrices are proved. Properties of block diagonal matrices andntheir sign patterns are examined. It is shown tha...

Applied mathematics

  • 2017
    • •
  • Jimp
    • •
  • Link
Result

G-matrices, J-orthogonal Matrices, and their Sign Patterns

Connections are made between the G-matrices and the J-orthogonal matrices. An investigation into the sign patterns of the J-orthogonal matrices is initiated. Some examples and open questions are provided....

BA - Obecná matematika

  • 2016
    • •
  • Jx
    • •
  • Link
Result

G-matrices

We define a new type of matrix called G-matrix as a real nonsingular matrix A for which there exist nonsingular diagonal matrices D1 and D2 such that (A-1)T=D1AD2. Many special matrices are G-matrices including (generalized) Cauchy matrices and o...

BA - Obecná matematika

  • 2012
    • •
  • Jx
    • •
  • Link
Result

Ranks of dense alternating sign matrices and their sign patterns

In this paper, an explicit formula for the ranks of dense alternating sign matrices is obtained. The minimum rank and the maximum rank of the sign pattern of a dense alternating sign matrix are determined. Some rel...

BA - Obecná matematika

  • 2015
    • •
  • Jx
    • •
  • Link
Result

Dual-band mutually orthogonal pattern antenna with fractal motif

For the dual-band operation, self-similarity of the fractal motif is employed. Antenna is electrically small: 0.2x0.2x0.12 ? in the lower band (1.25GHz) and 0.33x0.33x0.2 ? in the upper band (2GHz). Gain is >7dBi in both bands, while polarizations ar...

JA - Elektronika a optoelektronika, elektrotechnika

  • 2010
    • •
  • Gfunk
Result

Alternating projections and orthogonal decompositions

We present a new proof of von Neumann's classical convergence theorem regarding alternating orthogonal projections in Hilbert space. Our argument is based on an orthogonal decomposition lemma and on the construction of a Tietze-type...

BA - Obecná matematika

  • 2011
    • •
  • Jx
Result

Combinatorial aspects of generalized complementary basic matrices

This paper extends some properties of the generalized complementary basic matrices, in particular, in a combinatorial direction. These include inheritance (such as for Alternating Sign Matrices), spectral, and sign pattern ...

BA - Obecná matematika

  • 2013
    • •
  • Jx
    • •
  • Link
Result

Local Binary Pattern Based Features for Sign Language Recognition

In this paper we focus on appearance features describing the manual component of Sign Language particularly the Local Binary Patterns. We compare the performance signs with several repetitions. Local Binary Patterns

JD - Využití počítačů, robotika a její aplikace

  • 2011
    • •
  • Jx
    • •
  • Link
Result

Device for surface mapping of electrical potential caused by cardiac activity with a set of electrodes for placement in orthogonal coordinates

Device for surface mapping of electrical potential caused by cardiac activity with a set of electrodes for placement in orthogonal coordinates. Display of maps of surface potential of high-frequency components on the chest....

Cardiac and Cardiovascular systems

  • 2019
    • •
  • Fuzit
    • •
  • Link
Result

Glass melting and its innovation potentials: The potential role of glass flow in the sand-dissolution process

This work demonstrates how the temperature distribution and glass melt flow patterns resulting from these temperature gradients in a simple melting space or tank (horizontal orthogonal channel) influence sand dissolution from the me...

JH - Keramika, žáruvzdorné materiály a skla

  • 2009
    • •
  • Jx
  • 1 - 10 out of 108 415