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Systems, Man and Cybernetics, IEEE Transactions on

Issue 9 • Date Sept. 1978

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Displaying Results 1 - 15 of 15
  • [Table of contents]

    Publication Year: 1978 , Page(s): c1
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  • IEEE Systems, Man, and Cybernetics Society

    Publication Year: 1978 , Page(s): c2
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  • An Empirical Test of New Forecasting Methods Derived from a Theory of Intelligence: The Prediction of Conflict in Latin America

    Publication Year: 1978 , Page(s): 657 - 666
    Cited by:  Papers (1)
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    The "compromise" method is a new computer-based forecasting tool, available within the conversational CS package on the MIT Multics. Like regression (least squares) or new forms of Box-Jenkins methods, it estimates the parameters of a multivariate dynamic model and may be used for causal analysis or policy impact analysis. Unlike those maximum-likelihood methods, it does not assume that errors are "white noise," random and normal. It follows the newer robust philosophy of trying to minimize estimation errors on the assumption that noise will be inextricably dirty. In the case of "strong" dynamic models├é┬┐models which predict that changes in present variable values lead to comparable changes in future variable values it may reduce parameter errors by an order of magnitude. Forecasting errors will also be reduced, although the degree of reduction depends on how much randomness exists in the process. When we used the compromise method according to the new "bias" procedure, in order to reestimate the J-5 model (a nonlinear multiequation model used by the Department of Defense in long-range forecasting), forecasting errors were reduced by between 0 and 45 percent (with a median of about 20 percent) across different variables, as compared with regression. With simultaneous-equation econometric models, it has reduced them by 50 percent. The procedure has been documented for use by nonprogrammers [1]; it incorporates a new quasi-Newtonian method which can handle many parameters. View full abstract»

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  • Interactive Generation of Object Models with a Manipulator

    Publication Year: 1978 , Page(s): 667 - 679
    Cited by:  Papers (9)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (3624 KB)  

    Manipulator programs in a high-level language consist of manipulation procedures and object model declarations. As higher level languages are developed, the procedures will shrink while the declarations will grow. This trend makes it desirable to develop means for automating the generation of these declarations. A system is proposed which would permit users to specify certain object models interactively, using the manipulator itself as a measuring tool in three dimensions. A preliminary version of the system has been tested. View full abstract»

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  • Effectiveness of Basic Display Augmentation in Vehicular Control by Visual Field Cues

    Publication Year: 1978 , Page(s): 679 - 690
    Cited by:  Papers (6)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2220 KB)  

    The effectiveness of different basic display augmentation concepts (fixed reticle, velocity vector, and predicted future vehicle path) for remotely piloted vehicles (RPV) controlled by a vehicle mounted television camera is investigated. The task is lateral manual control of a low flying RPV along a straight reference line in the presence of random side gusts. The man-machine system and the visual interface are modeled as a linear time-invariant system. Minimization of a quadratic performance criterion is assumed to underly the control strategy of a well-trained human operator. The solution for the optimal feedback matrix enables the explicit computation of the variances of lateral deviation and directional error of the vehicle and of the control force that are used as performance measures. These variances are initially calculated with assumed values of human operator parameters such as weighting coefficients and noise levels. In particular, it is investigated whether and to what extent the human operator actually utilizes the display of information representing higher order state components such as lateral velocity and acceleration. The results show that the effectiveness of the display aids strongly depends on the vehicle dynamics and the spectrum of the disturbance. A velocity vector reticle is very effective for fast vehicle dynamics and rather ineffective for slow vehicle dynamics. On the other hand, a future vehicle path reticle is very effective for slow vehicle dynamics but less effective for fast vehicle dynamics and fast disturbances. The analytical results obtained are then validated by means of a specially developed flight simulator. View full abstract»

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  • An Approach to Spatial Pattern Recognition of Solid Objects

    Publication Year: 1978 , Page(s): 690 - 694
    Cited by:  Papers (1)
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  • Random Mosaic Models for Textures

    Publication Year: 1978 , Page(s): 694 - 702
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  • Optimal Myopic Strategies in Combined Decision and State Estimation Problems

    Publication Year: 1978 , Page(s): 702 - 705
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  • Noise Cleaning by Iterated Local Averaging

    Publication Year: 1978 , Page(s): 705 - 710
    Cited by:  Patents (1)
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  • A Sliding Scale for Hospital Reimbursement

    Publication Year: 1978 , Page(s): 710 - 711
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  • On-Line Maximum Likelihood Estimation for Load Forecasting

    Publication Year: 1978 , Page(s): 711 - 715
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  • Head Rotational Spectral Characteristics during Two-Dimensional Smooth Pursuit Tasks

    Publication Year: 1978 , Page(s): 715 - 724
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  • Contributors

    Publication Year: 1978 , Page(s): 724
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  • IEEE Systems, Man, and Cybernetics Society

    Publication Year: 1978 , Page(s): 724-a
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  • Information for authors

    Publication Year: 1978 , Page(s): 724b
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