Satellite overall test matrix

2019 ◽  
Vol 22 (6) ◽  
pp. 68-75
Author(s):  
Malik Khalfallah ◽  
Parisa Ghodous
Keyword(s):  
Test Matrix

A new test matrix for inverting matrices

1973 ◽  
Vol 8 (2) ◽  
pp. 22-23 ◽  
Author(s):  
Gerhard Zielke
Keyword(s):  
Test Matrix

scholarly journals A Schur-Cohn theorem for matrix polynomials

1990 ◽  
Vol 33 (3) ◽  
pp. 337-366 ◽  
Author(s):  
Harry Dym ◽  
Nicholas Young
Keyword(s):  
Unit Circle ◽  
Matrix Polynomial ◽  
Hermitian Matrix ◽  
Krein Space ◽  
Gram Matrix ◽  
Natural Basis ◽  
Test Matrix ◽  
Matrix Polynomials ◽  
Rational Vector ◽  
Square Matrix

Let N(λ) be a square matrix polynomial, and suppose det N is a polynomial of degree d. Subject to a certain non-singularity condition we construct a d by d Hermitian matrix whose signature determines the numbers of zeros of N inside and outside the unit circle. The result generalises a well known theorem of Schur and Cohn for scalar polynomials. The Hermitian “test matrix” is obtained as the inverse of the Gram matrix of a natural basis in a certain Krein space of rational vector functions associated with N. More complete results in a somewhat different formulation have been obtained by Lerer and Tismenetsky by other methods.

Investigation of Strip Seal Leakage With Special Focus on Seal Groove Design and Relative Displacement of Sealing Surfaces

2017 ◽  
Author(s):  
Thomas Huber ◽  
Cyrille Bricaud ◽  
Thomas Zierer
Keyword(s):  
Gas Turbine ◽  
Gas Turbines ◽  
High Performance ◽  
Relative Displacement ◽  
Curvature Radius ◽  
Special Focus ◽  
Test Matrix ◽  
Seal Design ◽  
Geometric Relation ◽  
Geometric Deviation

Tight sealing lines are vital in large gas turbines (GT) to achieve high performance and efficiency. Leakage including rim purge air can sum up to 30% of the total cooling and leakage air consumption of a gas turbine. Leakage through static strip seals contributes about 1/3 to all leakage air. Considering the seal design as on drawings, sealing quality is generally influenced by the seal type, sealing groove curvature and the sealing groove roughness. In addition the sealing quality depends strongly on the geometric deviation of the groove compared to ideal design. This is caused by manufacturing deviations or relative movements of the grooves during operation of the parts containing the sealing. In the article at hand, different seal designs and pertinent sealing quality is discussed. More in detail, it is discussed the geometric relation of seal, groove and misalignment to predict the seal position relative to its groove confinements. The risk of seal clamping can be judged and adaptation of seal or groove geometry can be derived. The effect of leakage increase due to misalignment is investigated by a test matrix varying seal length and curvature radius of groove as well as radial misalignment.

scholarly journals A two parameter test matrix

1964 ◽  
Vol 18 (86) ◽  
pp. 296-296 ◽  
Author(s):  
P. J. Eberlein
Keyword(s):  
Test Matrix ◽  
Parameter Test ◽  
Two Parameter

Solid-State Dissolved Oxygen Sensor Test Matrix Using a Pulsed-Plasma Deposited PTFE Film

2001 ◽  
pp. 1664-1667
Author(s):  
Glen W. McLaughlin ◽  
Katie Braden ◽  
Benjamin Franc ◽  
Gregory T. A. Kovacs
Keyword(s):  
Solid State ◽  
Dissolved Oxygen ◽  
Oxygen Sensor ◽  
Pulsed Plasma ◽  
Ptfe Film ◽  
Test Matrix

Measurement of quantum correlation by Frobenius norm in non-Markovian system

2018 ◽  
Vol 16 (03) ◽  
pp. 1850022 ◽  
Author(s):  
Juju Hu ◽  
Shuqin Liu ◽  
Yinghua Ji
Keyword(s):  
Density Matrix ◽  
Quantum System ◽  
Quantum Correlation ◽  
Quantum Discord ◽  
Frobenius Norm ◽  
Easy Method ◽  
Test Matrix ◽  
Research Results ◽  
Bipartite State ◽  
Markovian System

In order to measure the quantum correlation of a bipartite state quickly, an easy method is to construct a test matrix through the commutations among the blocks of its density matrix. Then, the Frobenius norm of the test matrix can be used to measure the quantum correlation. In this paper, we apply the measurement by Frobenius norm ([Formula: see text] to the dynamics evolution of the non-Markovian quantum system and compare it with the typical quantum discord ([Formula: see text] proposed by Ollivier and Zurek. The research results show that [Formula: see text] can indeed measure the quantum correlation of a bipartite state as same as [Formula: see text]. Further studies find that there are still differences between the two measurements: in some regions, when [Formula: see text] is zero, [Formula: see text] is not zero. It indicates that [Formula: see text] is more detailed than [Formula: see text] to measure quantum correlation of a bipartite state.

Hydrodynamic Coefficients of Cylinders With Strakes in Oscillatory Flows

2006 ◽  
Author(s):  
Renjeev Gopalakrishnakurup ◽  
David Clelland ◽  
Shan Huang
Keyword(s):  
Reynolds Number ◽  
Digital Signal ◽  
Water Tank ◽  
Hydrodynamic Coefficients ◽  
Oscillatory Flows ◽  
Signal Filtering ◽  
Test Matrix ◽  
Smooth Cylinder ◽  
Calm Water ◽  
Pitch Ratio

Hydrodynamic coefficients of cylinders fitted with strakes in oscillatory flows have been investigated. Three different pitch ratios have been tested, i.e. pitch ratios of infinity, 8 and 4. The cylinders are forced to oscillate in otherwise calm water in a water tank. To validate as well as to compare the experiment results, a smooth cylinder is included in the test matrix. Digital signal filtering has been found to influence the results obtained. Hence sine-fitted signals are used for obtaining the coefficients. For cylinders with strakes, it has been found that the coefficients vary little with Reynolds number. It is also concluded that the pitch ratio has a significant impact on the hydrodynamic coefficients.

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