Results 261 to 270 of about 8,456 (309)

Vector Display of Cardiac Performance

Cardiology, 1974
Cardiac performance analysis consisting of X-Y display of ventricular pressure and flow or of their derivatives, in the form of vector loops is described. Three vector loops are described: pressure-flow (P-F) loop, pressure-pressure derivative (P-dP/dt) loop, and pressure-flow acceleration (P-dF/dt) loop.
René A. Arcilla, Peter Sodt, Robert Replogle   +2 more
openaire   +1 more source

On noninferior performance index vectors

Journal of Optimization Theory and Applications, 1971
The noninferior vector index problem of optimal control theory is investigated in an effort to establish some basic properties of the noninferior index surface in the generalN-dimensional index problem. The vector performance index problem is first converted to a family of scalar index problems by forming an auxiliary scalar index as a function of the ...
Reid, R. W., Citron, S. J.
openaire   +1 more source

Computation of vectoring nozzle performance

26th Joint Propulsion Conference, 1990
As an initial step toward greater application of computational fluid dynamics to airframe/exhaust nozzle integration efforts, Euler codes were applied to numerically evaluate the internal performance of three advanced thrust vectoring nozzles developed for aircraft control.
Patrick L. Cheatham, Steven H. Walker, Marvin C. Gridley   +2 more
openaire   +1 more source

Performance of Vector Machines

1989
In the previous two chapters the architectures of two distinct families of vector processor were described. One, the CDC CYBER 205 uses operands stored in memory, whereas the other, the CRAY family, uses operands held in vector registers. Knowledge about such aspects of their design, together with knowledge about the clock periods of these machines ...
R. N. Ibbett, N. P. Topham
openaire   +1 more source

Pruning Support Vector Machines Without Altering Performances

IEEE Transactions on Neural Networks, 2008
Support vector machines (SV machines, SVMs) have many merits that distinguish themselves from many other machine-learning algorithms, such as the nonexistence of local minima, the possession of the largest distance from the separating hyperplane to the SVs, and a solid theoretical foundation.
Xun, Liang, Rong-Chang, Chen, Xinyu, Guo
openaire   +2 more sources

Automated performance analysis of short-vector versus long-vector electrocardiograms

Journal of Electrocardiology, 2009
Background: ST-deviation analysis is a cornerstone in the early triage of myocardial ischemia. The current electrocardiogram (ECG) criteria for the diagnosis of occlusive myocardial ischemia focus on ST elevations, but recent studies have proposed to include both ST depression and ST elevation in the diagnosis, hence considering all ST deviations as ...
Dirk Q. Feild, Stacy Gehman
openaire   +1 more source

Installed performance of vectoring/reversing non-axisymmetric nozzles

14th Joint Propulsion Conference, 1978
An experimental program was conducted to determine the internal and installed performance characteristics of five different thrust vectoring and reversing nonaxisymmetric nozzle concepts for tactical fighter aircraft. As part of this program, the nonaxisymmetric nozzles and an advanced axisymmetric baseline nozzle were tested in the AEDC 16-ft ...
P. E. Hiley, D. E. Kitzmiller, C. M. Willard   +2 more
openaire   +1 more source

Performance of vector sensors in noise

The Journal of the Acoustical Society of America, 2003
Vector sensors are super gain devices that can provide ‘‘array gain’’ against ocean noise with a point sensor. As supergain devices they have increased sensitivity to nonacoustic noise components. This paper reviews and summarizes the processing gain that is achievable in various noise fields.
Henry Cox, Arthur Baggeroer
openaire   +1 more source

Performance measures for estimating vector systems

1999 IEEE International Conference on Acoustics, Speech, and Signal Processing. Proceedings. ICASSP99 (Cat. No.99CH36258), 1999
We propose a framework of performance measures for analyzing estimators of geometrical vectors that have intuitive physical interpretations, are independent of the coordinate frame and parameterization, and have no artificial singularities. We obtain finite-sample and asymptotic lower bounds on them for large classes of estimators and show how they may
A. Nehorai, M. Hawkes
openaire   +1 more source

Performance of C++ bit-vector implementations

Proceedings of the 2010 Annual Research Conference of the South African Institute of Computer Scientists and Information Technologists, 2010
This paper describes an experimental study to compare the performance of various dynamically resizable bit-vector implementations for the C++ programming language. We compare the std::vector from the Standard Template Library (STL), boost::dynamic_bitset from Boost, Qt::QBitArray from QT Software, and BitMagic's bm::bvector from the STL with these ...
Pieterse, V., Kourie, D.G., Cleophas, L.G.W.A., Watson, B.W.   +3 more
openaire   +1 more source