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Electronic Computers, IRE Transactions on

Issue 4 • Date Dec. 1957

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Displaying Results 1 - 18 of 18
  • [Front cover]

    Publication Year: 1957 , Page(s): c1
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    Freely Available from IEEE
  • IRE Professional Group on Electronic Computers

    Publication Year: 1957 , Page(s): nil1
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    Freely Available from IEEE
  • [Breaker page]

    Publication Year: 1957 , Page(s): nil1
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  • The Synthesis and Analysis of Digital Systems by Boolean Matrices

    Publication Year: 1957 , Page(s): 231 - 241
    Cited by:  Papers (5)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1955 KB)  

    In this paper methods are described by which Boolean matrices can be used to synthesize digital systems. The matrices offer a means by which the design of such systems can be systematized much in the same way as do matrix methods when applied to electrical circuit design. They also present a means by which the problems of optimum logical design and programming can be approached. View full abstract»

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  • Simulation of Transistor Switching Circuits on the IBM 704

    Publication Year: 1957 , Page(s): 242 - 247
    Cited by:  Papers (1)
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    When the configuration of a circuit and the equivalent representations of the transistors are known, a computer program can be written to yield the performance of the circuit and the mean values of the circuit parameters. Nonlinearity of the transistors is accounted for by piece-wise linearization of an equivalent circuit. Rules of interconnection have been devised to combine this procedure efficiently with the manipulation of the matrix equations that define the linear extemal circuitry. The general method can be extended to combinations of basic circuits. View full abstract»

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  • An optimum character recognition system using decision functions

    Publication Year: 1957 , Page(s): 247 - 254
    Cited by:  Papers (67)  |  Patents (1)
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    The character recognition problem, usually resulting from characters being corrupted by printing deterioration and/or inherent noise of the devices, is considered from the viewpoint of statistical decision theory. The optimization consists of minimizing the expected risk for a weight function which is preassigned to measure the consequences of system decisions As an alternative minimization of the error rate for a given rejection rate is used as the critenon. The optimum recogition is thus obtained. The optimum system consists of a conditional-probability densisities computer; character channels, one for each character; a rejection channel; and a comparison network. Its precise structure and and ultimate performance depend essentially upon the signals and noise structure. Explicit examples for an additive Gaussian noise and a ``cosine'' noise are presented. Finally, an error-free recognition system and a possible criterion to measure the character style and deteriortation are presented. View full abstract»

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  • An Analysis of Certain Errors in Electronic Differential Analyzers I-Bandwidth Limitations

    Publication Year: 1957 , Page(s): 255 - 260
    Cited by:  Papers (6)
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    When a differential analyzer or analog computer is set up to solve a given equation, certain errors are introduced into the solution because the components of the computer are not perfect. Stated another way, the computer produces the solution to an equation, called the "machine equation," which differs from the given equation. In this paper the computer imperfections considered are 1) operational amplifier frequency response, 2) capacitor leakage resistance, and 3) stray capacitance in summing and integrating amplifier circuits. It is shown that when the given equation is a system of one or more linear differential equations with constant coefficients, the machine equation can be expressed approximately as an equation of the same degree as the given equation and with constant coefficients which are functions of the coefficients of the given equation and of the computer imperfections. View full abstract»

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  • Synthesis of Vector Networks

    Publication Year: 1957 , Page(s): 261 - 265
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    The convenience of vector notation in formulating physical geometrical problems results principally because the significance of the problem can be isolated from the analysis used in its solution. When analog computer techniques are employed in problems of this nature, the advantages of the vector methods frequently are lost because the computer inherently is more adaptable to solving problems described in the algebraic field of real numbers rather than in a vector space, and vector equations must be reduced to their scalar counterparts before a network for solving the equations may be synthesized. To facilitate treatment of problems of this type, a method is presented for synthesizing networks directly from the vector notation. This method will simplify synthesis and analysis of the networks by drawing a closer analogy between the mathematics and the electronics. The application of transformations and operators represents two areas in which the pertinent aspects of the method can be illustrated. This is accomplished by presenting first the basic mathematical background, followed by the network aspects of the problem, and finally, by the illustrative examples. The more extensive problems usually encountered, for example, in airborne fire-control systems, then may be synthesized by proper application of the elementary ``vector networks.'' View full abstract»

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  • Switching Functions of Three Variables

    Publication Year: 1957 , Page(s): 265 - 275
    Cited by:  Papers (2)
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    A switching function is a function of variables which take only the values 0 and 1, and which takes only these values itself. There are 256 different switching functions of three variables, but only 218 of these really depend on all three variables. A switching function of three variables can be expressed in terms of switching functions of two variables. For example F1{F2[A, F3(B, C)], F4(B, C)} can be shown to represent any function of A, B, and C if F1 F2 F3 and F4 are suitably chosen switching functions. The problem solved is: for each switching function of three variables, what is the least number of switching functions of two variables required express it? View full abstract»

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  • Analysis of Sequential Machines

    Publication Year: 1957 , Page(s): 276 - 285
    Cited by:  Papers (12)
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    This paper begins with Mealy's model of a sequential machine and introduces a ``connection matrix'' which describes the machine completely. The ``equivalence'' of states of such a machine may be analyzed systematically by an iterative technique, the validity of which is rigorously established. Once equivalence is completely analyzed, it is a simple matter to write the connection matrix for the simplest equivalent machine. The process is not difficult to execute, even in complex cases, and could be programmed for a computer. View full abstract»

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  • The Logical Combination of Punched Paper Tapes

    Publication Year: 1957 , Page(s): 285 - 286
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    First Page of the Article
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  • Demonstration of Conditional Stability on an Analog Computer

    Publication Year: 1957 , Page(s): 287
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    First Page of the Article
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  • On the Use of Redundant Integrators in Analog Computers

    Publication Year: 1957 , Page(s): 287 - 288
    Cited by:  Papers (1)
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    First Page of the Article
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  • Contributors

    Publication Year: 1957 , Page(s): 288
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    Freely Available from IEEE
  • PGEC News

    Publication Year: 1957 , Page(s): 289
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    Freely Available from IEEE
  • Reviews of Current Literature

    Publication Year: 1957 , Page(s): 291 - 307
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    Freely Available from IEEE
  • Index to IRE Transactions on Electronic Computers

    Publication Year: 1957 , Page(s): 1 - 4
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    Freely Available from IEEE
  • [Front cover]

    Publication Year: 1957 , Page(s): c2
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    Freely Available from IEEE

Aims & Scope

This Transactions ceased publication in 1962. The current retitled publication is 

IEEE Transactions on Computers.

Full Aims & Scope