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Proceedings of the IEEE

Issue 12 • Date Dec. 1981

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Displaying Results 1 - 25 of 26
  • [Front cover and table of contents]

    Publication Year: 1981, Page(s): c1
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  • Scanning the issue

    Publication Year: 1981, Page(s): 1523
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  • A technical and economic assessment of computer vision for industrial inspection and robotic assembly

    Publication Year: 1981, Page(s):1524 - 1538
    Cited by:  Papers (10)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1843 KB)

    The use of computer vision to detect, measure, and perhaps guide the assembly of man-made components is potentially a very significant research and development area. The efficacy of these techniques for any given application depends on both technical and economic considerations. This paper will explore both these considerations using appropriate generic examples. It is our goal to first present a ... View full abstract»

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  • Nonlinear echoes, phase conjugation, time reversal, and electronic holography

    Publication Year: 1981, Page(s):1539 - 1556
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1814 KB)

    In this paper we review the experiments on nonlinear echo phenomena during the last three decades, from spin echoes to echoes in piezoelectric powders. We show how the common principle is one of a physical Fourier transform space in which time reversal is brought about through phase conjugation. It will be seen how this leads to intriguing applications in signal processing, signal storage, and ele... View full abstract»

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  • Nonlinear system modeling based on the Wiener theory

    Publication Year: 1981, Page(s):1557 - 1573
    Cited by:  Papers (104)  |  Patents (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1615 KB)

    This paper is a tutorial of nonlinear system modeling methods which are based on the Wiener theory of nonlinear systems. The basic concepts that underlie the Wiener theory are discussed and illustrated. Various modeling methods are presented by which a non-linear system can be modeled using either white Gaussian, nonwhite Gaussian, or certain non-Gaussian inputs. The experimental error in determin... View full abstract»

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  • Analogy to numerical solution of wave propagation in an inhomogeneous medium with gain or loss variations

    Publication Year: 1981, Page(s):1574 - 1575
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (190 KB)

    An analogy to numerical method is presented for solving the problem of wave propagation in inhomogeneous media. This method may be used to calculate the modes in an inhomogeneous slab waveguide without using the Wentzel-Kramer-Brillouin (WKB) method or perturbation method. View full abstract»

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  • Magnetoelectric properties of an electron beam

    Publication Year: 1981, Page(s):1575 - 1577
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (308 KB)

    An electron beam is described as a magnetoelectric medium. Expressions for the energy and power flux densities are deduced and applied to the plane waves propagating in the direction of the beam. View full abstract»

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  • A property of digital quadrature filters

    Publication Year: 1981, Page(s):1577 - 1578
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (222 KB)

    A relationship is derived for digital linear-phase quadrature filters of even length. It is shown that their impulse responses are simply related through an alternate sign inversion operation. View full abstract»

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  • Evaluation method of device noise figure and gain through noise measurements

    Publication Year: 1981, Page(s):1578 - 1579
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (186 KB)

    A new method of evaluating the noise figure and available gain of a linear two-port device only from noise measurements is proposed. In this method, there is no need for tuning at the output port of a device under test (DUT) by the use of an excess noise injection through a circulator to the device output port. Hence it gives a much simplified procedure and an improvement of accuracy. View full abstract»

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  • A note on new inner-matrix for stability

    Publication Year: 1981, Page(s):1579 - 1580
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (188 KB)

    In this note a new inner-matrix for stability is introduced. The application of such a matrix for open left half-plane and inside the unit circle roots of complex polynomials is shown. Furthermore, the Hurwitz minors for left half-plane stability of real polynomial are given in terms of inners determinants of a resultant matrix. This connection is obtained by symmetrizing the Schur-Complement of t... View full abstract»

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  • Spatial replication in back-propagated acoustic holograms

    Publication Year: 1981, Page(s):1580 - 1582
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (313 KB)

    Acoustic holograms may be reconstructed digitally by the method of backward wave propagation. The images may be distorted by spatial replication, caused by the use of two discrete Fourier transforms (DFT's) in sequence to produce the image. This phenomenon is illustrated and explained, as is a method to prevent the distortion. View full abstract»

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  • Distribution of a random walk with an application to a truncated nonparametric sequential test

    Publication Year: 1981, Page(s):1582 - 1584
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (252 KB)

    Explicit expressions for the probability of reaching a given position at each stage of a random walk are derived for the case of absorbing boundaries. Utilizing these results, exact expressions for the power function and the average sample number function of a truncated nonparametric sequential test are obtained. Some numerical examples are also given. View full abstract»

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  • On the absolute stability of nonlinear feedback systems

    Publication Year: 1981, Page(s):1584 - 1585
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (174 KB)

    A new criterion for absolute stability in the sector [a, η], a ≠ 0, is presented. View full abstract»

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  • A new FM modulator using phase unstable PLL (PU-PLL)

    Publication Year: 1981, Page(s):1585 - 1586
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (255 KB)

    A phase-locked loop (PLL) with a second-order low-pass filter can oscillate with the frequency nearly equal to the filter cutoff. By modulating the amplitude of the oscillation, a stable frequency modulated signal can be obtained at the output of a voltage-controlled oscillator (VCO). View full abstract»

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  • Formulas for computation of approximate values of some Bessel functions

    Publication Year: 1981, Page(s):1586 - 1588
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (255 KB)

    Formulas are obtained for J0(x),J1(x),J2(x),I0(Y),I1(y), I2(Y), in terms of trigonometric and hyperbolic functions. These give accuracy suitable for many practical purposes for values of x up to about 4, or even higher in one case, and for greater values of y. View full abstract»

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  • High power electrostatic generator with rotor of piezoelectric strips

    Publication Year: 1981, Page(s):1588 - 1590
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (310 KB)

    The paper discusses a multipole ESG with rotor of piezo-electric strips. The polarization of a strip, bent due to rotation, causes an ac in a resistor connected across electrode pairs. With rotor of PZT-5 or ZnO crystal, the calculated power of the generator is above 3 and 22 kW, respectively, under vacuum insulation strength of 10 kV/mm. View full abstract»

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  • Modified cubic B-spline interpolation

    Publication Year: 1981, Page(s):1590 - 1592
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (301 KB)

    The image samples from most scanning systems are integral averages of the light intensity over resolution elements. New modified B-spline interpolations are conceived and operated on these nonideal samples. In addition to smooth interpolation, the derivation and experiment also show reduction of interpolation error due to finite width sampling. View full abstract»

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  • A new classification of logic functions of three variables

    Publication Year: 1981, Page(s):1592 - 1594
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB)

    This letter presents a new categorization of three-variable logic functions based on tree type multiplexer implementation. Certain generalizations useful in implementing logic functions of a large number of variables are brought out. View full abstract»

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  • Human interaction with computers

    Publication Year: 1981, Page(s): 1594
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  • Systems engineering models of human-machine interaction

    Publication Year: 1981, Page(s):1594 - 1595
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  • The micro milleneum

    Publication Year: 1981, Page(s):1595 - 1596
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  • Electronics

    Publication Year: 1981, Page(s): 1596
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  • Frequency-response methods in control systems

    Publication Year: 1981, Page(s): 1596
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  • Information, transmission, modulation and noise

    Publication Year: 1981, Page(s):1596 - 1597
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  • Book alert

    Publication Year: 1981, Page(s):1597 - 1598
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The most highly-cited general interest journal in electrical engineering and computer science, the Proceedings is the best way to stay informed on an exemplary range of topics.

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Meet Our Editors

Editor-in-Chief
H. Joel Trussell
North Carolina State University