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IEEE Transactions on Systems Science and Cybernetics

Issue 2 • April 1970

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  • [Table of contents]

    Publication Year: 1970, Page(s): c1
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  • IEEE Systems Science and Cybernetics Group

    Publication Year: 1970, Page(s): c2
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  • SSC Group ADCOM Members

    Publication Year: 1970, Page(s):77 - 78
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  • SSC Group Associate Editors

    Publication Year: 1970, Page(s):79 - 80
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  • Queueing Requirements in an Automatic Radar Target Detection System Operating with a Narrow Bandwidth Data Link

    Publication Year: 1970, Page(s):81 - 91
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1447 KB)

    Automation of the radar target detection process for remotely located scanning radars in an air traffic control system results in a queueing requirement for target reports when the communication link transfer rate is less than that of the radar. To determine the nature of this queueing requirement, a systems model was developed which incorporates the effects of aircraft target spacing at random in... View full abstract»

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  • Fundamental Structure of Input-Output Stability for Feedback Systems

    Publication Year: 1970, Page(s):92 - 96
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1097 KB)

    An approach to the input-output stability of feedback systems is discussed. This approach incorporates the natural inverse operator model to describe these systems. Using this operator, the input-output stability problem is decomposed into five subproblems. One of these subproblems involves the causality of the input-output operator, a property not recognized in previous feedback system stability ... View full abstract»

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  • Learning Applied to Successive Approximation Algorithms

    Publication Year: 1970, Page(s):97 - 103
    Cited by:  Papers (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1142 KB)

    A linear reinforcement learning technique is proposed to provide a memory and thus accelerate the convergence of successive approximation algorithms. The learning scheme is used to update weighting coefficients applied to the components of the correction terms of the algorithm. A direction of the search approaching the direction of a "ridge" will result in a gradient peak-seeking method which acce... View full abstract»

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  • Visual Target Tracking with Active Head Rotation

    Publication Year: 1970, Page(s):103 - 109
    Cited by:  Papers (13)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3771 KB)

    Visual target tracking during active head movements is investigated. Transient response and frequency response both indicate that the eye tracking behavior relative to the target is independent of head movement. The explanation of this phenomenon is pursued. It seems most likely that the vestibulo-ocular reflex, the eye movements elicited by head rotation, plays an essential role. Compensation for... View full abstract»

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  • On the Extraction of Pattern Features from Continuous Measurements

    Publication Year: 1970, Page(s):110 - 115
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (914 KB)

    A suboptimum method of extracting features, by linear operations, from continuous data belonging to M pattern classes is presented. The set of features selected minimizes bounds on the probability of error obtained from the Bhattacharyya distance and the Hajek divergence. The random processes associated with the pattern classes are assumed to be Gaussian with different means and covariance functio... View full abstract»

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  • Studies in Postural Control Systems Part I: Torque Disturbance Input

    Publication Year: 1970, Page(s):116 - 121
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (941 KB)

    The postural control system in normal humans is studied by applying a mechanical torque disturbance to the system. It is shown that the response of the system can be approximated by a second-order differential equation where the parameters depend on the state of the system. View full abstract»

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  • Studies in Postural Control Systems Part II: Tendon Jerk Input

    Publication Year: 1970, Page(s):122 - 126
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (928 KB)

    The postural control system in normal humans is studied by applying a tendon jerk disturbance to the system. A stretch reflex was elicited in the gastrocnemius-soleus muscle by a tap on the achilles tendon. It is shown that the initial conditions (muscle tension or the length of the muscle) and the stimulus (strength of the hammer force) have strong influence on the reflex response (change in foot... View full abstract»

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  • Studies in Postural Control Systems Part III: A Muscle Spindle Model

    Publication Year: 1970, Page(s):127 - 132
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1021 KB)

    A linear lumped-parameter mechanical model of the muscle spindle is presented. It is shown that the model simulation on a digital computer exhibits the spindle behavior in most aspects of transient ramp-stretch performance. The requirements that such a model places on the mechanisms of fusimotor control are discussed. View full abstract»

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  • A Shrinking Boundary Algorithm for Discrete System Models

    Publication Year: 1970, Page(s):133 - 140
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1489 KB)

    Improved mathematical optimization procedures are steadily finding wider use in engineering system studies, but the difficulties associated with the solution of discrete decision variable models remain formidable. An algorithm is described which will solve a certain class of problems formulated as linear integer programs. The procedure employs parallel shifts of selected boundary planes. This is a... View full abstract»

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  • On How Often the Supervisor Should Sample

    Publication Year: 1970, Page(s):140 - 145
    Cited by:  Papers (52)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1025 KB)

    A procedure is presented for specifying how long a supervisor or monitor of a process should wait between input samples to maximize a given value or payoff function, assuming he resets the controls with each sample as a function of the best information he has. The procedure is based upon Bayesian preposterior information analysis. View full abstract»

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  • A Multistage Solution of the Template-Layout Problem

    Publication Year: 1970, Page(s):145 - 151
    Cited by:  Papers (37)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1045 KB)

    The template-layout problem is to determine how to cut irregular-shaped two-dimensional pieces out of given stock sheets in an optimum manner without making an exhaustive search of all possible arrangements of the pieces. An algorithm is described for solving template-layout problems with a digital computer. The method of solution requires that the irregular shapes be enclosed, singly or in combin... View full abstract»

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  • An Unsupervised Learning Problem Using Limited Storage Capacity

    Publication Year: 1970, Page(s):151 - 152
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (385 KB)

    In unsupervised learning pattern recognition problems, the need arises for updating conditional density functions of uncertain parameters using probability density function mixtures. In general, the form of the density mixtures is not reproducing, invoking the need for unlimited system storage requirements. One suboptimal method for achieving limited storage is to restrict the uncertain parameters... View full abstract»

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  • Recognition of Handprinted Numerals by Two-Stage Feature Extraction

    Publication Year: 1970, Page(s):153 - 154
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (359 KB)

    An optical character recognition system for handprinted numerals of noisy and low-resolution measurement is proposed. The system consists of the two-stage feature extraction process. In the first stage a set of primary features insensitive to the quality and format of a black-white bit pattern are extracted. In the second stage, a set of properties capable of discriminating the character classes i... View full abstract»

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  • Constraint Theory Applied to the Kinematics of Free-Fall Weapons

    Publication Year: 1970, Page(s):154 - 157
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1451 KB)

    A recent application of many of the principles established in [1]-[3] is presented. Although the fundamental motivation of the theory is to analyze constraint in mathematical models of very high dimension, it is hoped that this ten-dimensional example will clarify the techniques and provide a focus for the utility of the constraint concept. View full abstract»

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  • Contributors

    Publication Year: 1970, Page(s):157 - 160
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  • Information for authors

    Publication Year: 1970, Page(s): 160b
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