Browsing Electrical Engineering and Computer Science by Issue Date
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On Schwarz canonical form for large system simplification
(IEEE, 19750401)Recently a new technique for the reduction of a largeorder dynamical system, using Schwarz canonical form, has been proposed [1]. It is presently shown that the above is essentially a frequency domain technique for which ... 
Identification of nonlinear systems in frequency domain
(IEEE, 19751101)A frequency domain technique for identifying a class of nonlinear systems is presented. The class of nonlinear systems we consider in this paper consists of a power series nonlinearity sandwiched between two linear systems ... 
Experimental results of the remote sensing of seasurface salinity at 21cm wavelength
(IEEE, 19760701)The complex dielectric constant of sea water is a function of salinity at 21cm wavelength, and seawater salinity can be determined by a measurement of radiometric temperature at 21 cm along with a measurement of thermodynamic ... 
Authors' reply
(IEEE, 19760801) 
An algorithm for the two dimensional FFT
(IEEE, 19770501)Conventional two dimensional fast Fourier transforms become very slow if the size of the matrix becomes too large to be contained in memory. This is due to the transposition of the matrix that is required. This new algorithm ... 
The zoom FFT using complex modulation
(IEEE, 19770501)A recent paper by Yip discussed the zoom transform as derived from the defining equation of the FFT. This paper simplifies the concepts and removes some of the restrictions assumed by Yip; ie., the total number of points ... 
Twodimensional zoom FFT
(IEEE, 19780401)The concept of the zoom FFT (a more efficient algorithm which allows zooming in on a narrow segment of the spectrum while preserving its frequency content) is extended to the twodimensional case. The technique is further ... 
An optimal frequency domain filter for edge detection in digital pictures
(IEEE, 19790101)Edge detection and enhancement are widely used in image processing applications. In this paper we consider the problem of optimizing spatial frequency domain filters for detecting edges in digital pictures. The filter is ... 
Optimal control systems with low sensitivity to small time delays
(IEEE, 19791201)The problem of reducing trajectory sensitivity to small time delays is considered. State and output feedback gains are computed, so that the system performs optimally with low sensitivity. The delay is assumed to be expected ... 
A digital quarter square multiplier
(IEEE, 198003)An application of the quarter square multiplication technique used in analog computing is proposed for digital multiplication. Significant savings in storage requirements for ROM implemented product tables are demonstrated. ... 
On the eigenvalue placement of discretetime systems with slow and fast modes
(IEEE, 19840606)Linear shift invariant discretetime systems with slow and fast modes are considered. Singular perturbation techniques are used to obtain the slow subsystem and the fast subsystem. A reducedorder control is designed for ... 
Decoupling of large scale systems
(IEEE, 19840606)Linear shift invariant large scale discretetime multivariable systems whose inputs and outputs are strongly interacted, are considered. The designing of compensators to decouple these systems is presented. 
Measurement of Gaussian beam diameter using ronchi rulings
(IEEE, 19850509)The analytical and experimental scope of the generalised Ronchi ruling method for the measurement of Gaussian laser beam diameter is presented. The effects of the ruling periodicity, ruling duty cycle, ruling type and the ... 
Estimation of maximum amplitudes of conductor galloping by describing function analysis
(IEEE, 19860101)Estimates of maximum amplitudes of conductor galloping are needed in order to determine appropriate phasetophase clearances on overhead lines. A new method for computing these estimates is presented. The method gives ... 
The observerbased controller design of the discretetime singularly perturbed systems
(IEEE, 19860618)The dynamic feedback control for a class of linear shiftinvariant discretetime singularly perturbed systems with inaccessible states is considered through a separate observerbased controller design for two lowerdimensional ... 
Output feedback design of singularly perturbed discretetime systems
(IEEE, 19860618)The output feedback regulator design for linear shiftinvariant discretetime systems possessing the twotimescale property is considered. An approximating quadratic performance index is derived, reflecting a twotimescale ... 
The observerbased controller design of discretetime singularly perturbed systems
(IEEE, 19870301)A class of linear shiftinvariant discretetime singularly perturbed systems with inaccessible states is considered. A design technique is formulated by which the stabilizing controller can be formed through the controllers ...