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Systems, Man and Cybernetics, 1989. Conference Proceedings., IEEE International Conference on

Date 14-17 Nov. 1989

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  • 1989 IEEE International Conference on Systems, Man and Cybernetics. Conference Proceeding. (Cat. No.89CH2809-2)

    Publication Year: 1989
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    Freely Available from IEEE
  • CAD-based computer vision: from CAD models to relational graphs

    Publication Year: 1989 , Page(s): 162 - 167 vol.1
    Cited by:  Papers (1)  |  Patents (1)
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    The authors outline their approach for automatic translation of geometric entities produced by a CAD system into a relational graph structure. They have developed a system which uses 3-D object descriptions created on a commercial CAD system and expressed in the industry-standard IGES form, and performs geometric inferencing to object a relational graph representation of the object which can be stored in a database of models of object recognition. Details of the IGES standard, the geometric inference engine, and some formal properties of 3-D models are discussed. In addition to the process of translation from one data format to another, the interference engine extracts higher-level information from the CAD model and stores it explicitly in the new data structure. The higher-level features will allow the search space explored during the object recognition stage to be pruned early.<> View full abstract»

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  • Segmentation of document images

    Publication Year: 1989 , Page(s): 1062 - 1067 vol.3
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    Several methods for segmentation of document images are explored. The authors pose the segmentation operation as a statistical classification task with two pattern classes: print and background. A number of classification strategies are available. All require some prior information about the distribution of gray levels for the two classes. Learning (either supervised or unsupervised) and automatic updating of the class-conditional densities are performed within image subregions to adapt global density estimates to the local area. After local densities have been obtained, each pixel within the window is classified; several techniques for this are considered. Results on four test images indicate that the commonly used contextual models are not suitable to all document images.<> View full abstract»

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  • An interruption tree model to evaluate system performance of industrial processing complex

    Publication Year: 1989 , Page(s): 1224 - 1225 vol.3
    Cited by:  Patents (2)
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    An interruption tree model was developed to analyze the problems of product interruptions in industrial processing systems and to estimate the performance of a processing system through simulation. Alternative policies to reduce interruptions, simulation of the model under each policy, and identification of the optimal policy are presented View full abstract»

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  • User modeling and knowledge-based support: on the evaluation of improved system design

    Publication Year: 1989 , Page(s): 24 - 28 vol.1
    Cited by:  Patents (1)
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    Various approaches to user modeling are presented and the possibility for verification is assessed. In a larger context, this leads to the issue of evaluating and validating combined human-machine systems in the presence of model-based and expert-system-based operator support. With such support, detailed measures and analyses of the overall system performance become more important. An example of a project that deals with a multi-expert-system supported graphical dialogue environment (GRADIENT) illustrates some of the aspects of designing experiments and other suitable approaches for assessing the system's impact on the human operator's behavior and performance. The general guideline is to plan evaluation bottom up, combining many specific or restricted aspects in order to gain a comprehensive understanding of the overall systems. It is suggested that, even with full use of existing methodologies, the evaluation of complex operator support systems may fail, and, therefore, directions for research are proposed that appear promising View full abstract»

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  • Integration of ultrasonic and vision sensors for 3-D underwater scene analysis

    Publication Year: 1989 , Page(s): 582 - 583 vol.2
    Cited by:  Papers (1)
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    A method for calibrating ultrasound and video sensors in the hostile underwater environment is presented. It yields sufficient accuracy to allow transformation of image data in one sensor's image plane to the baseframe, and from there into the other sensor's image plane, a prerequisite for any form of sensor fusion. The feasibility of automatic segmentation of underwater video scenes in combination with sparse ultrasound data has been demonstrated by experiment View full abstract»

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  • The optimal design of decentralized information exchanging

    Publication Year: 1989 , Page(s): 945 - 946 vol.3
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    The problem of canceling fixed modes for decentralized systems via information exchanges is considered. For decentralized systems with two stations, the least number of required exchange channels is given, as is a design method. This is used as the basis for a recursive algorithm for the three-station case. The algorithm can be extended further to the general case View full abstract»

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  • Design of an FMS operator workstation using the Rasmussen abstraction hierarchy

    Publication Year: 1989 , Page(s): 959 - 964 vol.3
    Cited by:  Papers (1)
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    A description is given of a research domain developed to study the role of human supervisory control in discrete manufacturing. A discussion is presented of the problems found when attempting to map J. Rasmussen's hierarchy (1986) directly to the discrete manufacturing domain. A methodology is proposed for extending Rasmussen's hierarchy to discrete manufacturing, and a plan to validate the hypothesis is suggested View full abstract»

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  • Standard medical device data language (MDDL): architecture and applications

    Publication Year: 1989 , Page(s): 1104 - 1108 vol.3
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    A medical device data language (MDDL) is being developed by the P1073 Medical Information Bus (MIB) Standard Committee, under the auspices of the Engineering in Biology and Medicine Society (EMBS) of the IEEE. A review is presented of several significant architectural notions and application issues associated with MDDL. The conflicting requirements of comprehensiveness, flexibility, extensibility, and feasibility (cost, performance) have necessitated the use of a number of methods ranging from object-oriented abstraction to regenerative transformational grammar to substitution of other languages. As a result, significant progress has been made but further work is needed and is continuing to achieve a `survivable' MDDL. Present emphasis is on specification of the initial version and on extensibility and compatibility of evolved versions View full abstract»

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  • Edge adaptive filtering: how much and which direction?

    Publication Year: 1989 , Page(s): 364 - 366 vol.1
    Cited by:  Papers (2)  |  Patents (5)
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    A novel adaptive filter for edge-preserving smoothing of noisy images is introduced. The novelty of the filter is that its region of support is tuned simultaneously in its size and orientation. An edge strength measure is extracted from the local variance and used to control the size of the window. The gradient direction is used to adapt the orientation of the window. The use of both edge strength and edge detection information allows large windows to be used even in the vicinity of edges. The filter has been tested for additive white Gaussian noise with the mean as the point estimator over local windows, and for additive white impulse noise with the median as the point estimator. Results, particularly for the adaptive median filter, are very promising. The results show that the filter does greater smoothing in the vicinity of edges without compromising performance away from edges and the edge structure of the image View full abstract»

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  • A global approach for the path generation of redundant manipulators

    Publication Year: 1989 , Page(s): 538 - 544 vol.2
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    A singularities avoidance approach suitable for the optimal path planning of redundant robot manipulators is presented. The approach is based on establishing proper bounds for the rate of change of the Jacobian matrix of the transformation between the joint speeds and the end effector Cartesian speed. These bounds become an additional constraint for an optimization problem that is formulated to obtain the optimal path of the robot manipulator. Here, the optimization problem is formulated globally as a state-constrained continuous optimal control problem which can consider joint (speeds) constraints and/or manipulator dynamics, and be solved by an efficient iterative numerical technique. This approach is particularly exemplified for the optimal path generation of a simulated planar redundant manipulator, and its results are compared with the results yielded by a local approach. The results obtained (although not adequate for present real-time implementation) confirm the superiority of the global approach View full abstract»

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  • Variable and fixed rank 1 N4 interconnections [optical neural nets]

    Publication Year: 1989 , Page(s): 405 - 407 vol.2
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    It is shown that full interconnection of an N×N array to an N×N output array with a rank-1 N4-component matrix is quite straightforward for essentially all values of N. A number of applications and implementations are then described, showing that for fixed interconnect systems one can achieve small size, ruggedness, low cost, and speed View full abstract»

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  • Attention allocation using interacting neural populations

    Publication Year: 1989 , Page(s): 216 - 217 vol.1
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    It is hypothesized that the various kinds of attentional mechanisms seen in cognitive processing are all related to the modularization that results from the interaction of activity patterns generated by different neural populations. The author considers four basic types of neural populations that differ in their distribution of axon terminations and the effect of their neurotransmitters. Nodes with terminations restricted to a single region and circularly distributed around the node center are called short-range (ShR), while nodes with axons going between regions are called long-range columnar (LRC). The terminations of LRC units form a column in their target region which is several times larger than the circle formed by the terminations of an ShR node. The ShR correspond to interneurons, while the LRC correspond to the relay neurons found in the brain. Both the ShR and the LRC units consist of an excitatory and an inhibitory population. The author discusses how a neural network with these populations can do allocation of attention to sensory, memory, and cognitive channels View full abstract»

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  • Computation of features of 2-D polycurve-encoded boundaries

    Publication Year: 1989 , Page(s): 1041 - 1047 vol.3
    Cited by:  Patents (1)
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    Polycurve codes is the name of a line-drawing model for describing object boundaries and contour lines. It belongs to chain-coding families such as chain codes and generalized chain codes. Polycurve codes make possible the direct extraction and labeling of predefined high-level line and arc segments from irregular object boundaries. Several algorithms for computing features of the objects from polycurve-encoded boundaries are presented. Some geometric calculation such as inverse and intersection points of two polycurves are also considered. The algorithms use look-up tables indexed by segment labels so that only elementary operations such as addition and subtraction may be required View full abstract»

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  • Multilayered cognitive processing

    Publication Year: 1989 , Page(s): 1206 - 1207 vol.3
    Cited by:  Papers (1)
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    The complexity of large-scale systems can be controlled by imposing structure on the problem space. In the domain of device diagnosis the problem space consists of all possible faults and their manifestations which cannot be represented directly. A multitude of perspectives, such as physical structure, function, and behavior, need to be modeled to describe this space implicitly. The utility of a multilayered knowledge representation scheme for a relation-based knowledge base is demonstrated. The structure established by multiple layers and multiple perspectives facilitates classification of symptoms and focuses on the exploration of the solution space View full abstract»

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  • An intelligent diagnosis and control system for a complex data acquisition equipment in nuclear physics investigations

    Publication Year: 1989 , Page(s): 282 - 285 vol.1
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    The implementation of an expert system making possible online fault diagnosis on a complex data acquisition system, a particle detector, designed for the MACRO (Monopoles, Astrophysics and Cosmic Ray Observatory) physics investigations is outlined. The system, called MADIES (Macro Diagnostic Expert System), is designed to take appropriate control actions in order to reduce the unavailability of the apparatus. MADIES was developed using the NEXPERT commercial shell View full abstract»

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  • A preview control model of driver steering behavior

    Publication Year: 1989 , Page(s): 504 - 509 vol.2
    Cited by:  Papers (4)
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    A preview control model of driver steering behavior is introduced which is an outgrowth of a model of the human pilot. This model was developed to describe the preview control behavior of the human pilot in low-level flight tasks. The model describes preview behavior as a natural extension of compensatory and pursuit tracking. The preview model is exercised in analyzing driving tasks such as lane tracking on a cured roadway, and lane change maneuvers View full abstract»

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  • Whence networking

    Publication Year: 1989 , Page(s): 977 - 980 vol.3
    Cited by:  Papers (1)
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    Problems that are due to the lack of attention to human-factors engineering principles in the design of current networks are identified. The evolution of networks is compared with the evolution of the telephone system in the US and resulting lessons of history are identified. Sources for human-factors engineering expertise are listed. Network system and network component designers are admonished to observe sound human-factors principles and to evolve an integrated network system that has a uniform method of access from any terminal View full abstract»

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  • Experiments on a lattice theory of operator mental models

    Publication Year: 1989
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    Summary form only given. The importance of mental models in complex control tasks is discussed, and the lattice theory of mental models is described. Plans for a series of experiments using a simulation developed with the Lab View programming language to validate the lattice theory of mental models are reported View full abstract»

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  • Multi-branched diagnostic trees

    Publication Year: 1989 , Page(s): 92 - 98 vol.1
    Cited by:  Papers (1)
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    The authors describe the application of quantitative model-based reasoning to the automatic generation of multi-branched diagnostic trees using only a system model description containing connectivity and functional information. The technique is demonstrated using two examples, diagnosing a simple adder-multiplier circuit and a more complex analog feedback control system. Quantitative measures are defined for the performance of the generated trees, and data show that both diagnostic accuracy and efficiency increase with larger branching factors. This technique is believed to hold significant potential for increasing the productivity of developing fault isolation test programs View full abstract»

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  • A study of document format identification based on table structure

    Publication Year: 1989 , Page(s): 845 - 846 vol.2
    Cited by:  Papers (1)  |  Patents (1)
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    A method to identify formatted documents through table structure is described. This method extracts connected components of white pixels in documents for identification, using a subspace classification method. The effectiveness of this method is discussed. The authors focus on the discriminant functions of this classification and consider the applicability of the method for practical use View full abstract»

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  • Bimanual micro manipulator for televideo operation of anthropomorphic robots

    Publication Year: 1989 , Page(s): 804 - 805 vol.2
    Cited by:  Papers (1)
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    Some problems raised by bimanual coordination control of articulated systems are studied. In particular, the performance of human operators driving an anthropomorphic robot along 3-D trajectories using either a bimanual micromanipulator or a keypad is compared. The trajectories were materialized in space by a thin wire twisted to trace a cosine wave. The performance was quantified in terms of total time (that is, the time to drive the robot effector through the trajectory), cumulated error, standard deviation and maximum error along the trajectory View full abstract»

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  • An iterative growing and pruning algorithm for classification tree design

    Publication Year: 1989 , Page(s): 818 - 823 vol.2
    Cited by:  Papers (2)
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    An efficient iterative method is proposed to grow and prune classification trees. This method divides the data sample into two subsets and iteratively grows a tree with one subset and prunes it with the other subset, successively interchanging the roles of the two subsets. The convergence and other properties of the algorithm are established. Theoretical and practical considerations suggest that the iterative tree growing and pruning algorithm should perform better and require less computation than other widely used tree growing and pruning algorithms. Numerical results on a waveform recognition problem are presented to support this view View full abstract»

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  • Signal processing in neuron network: a radically different view

    Publication Year: 1989 , Page(s): 433 - 434 vol.2
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    The neuron network in the inner catfish retina was studied by injecting current from the one neuron and recording resulting responses into a nearby neuron. Current injected into an amacrine or a ganglion cell always produced a response from neighboring amacrine or ganglion cells chosen randomly. Bidirectional communications were found to exist for neurons of similar response patterns, e.g. on-cell pair, off-cell pair, or on-off cell pairs. These communications are mutually excitatory, fast, and likely linear. Single transmission between neurons of different response patterns was also shown to exist View full abstract»

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  • Modelling the spatial recognition process in a computer-generated 3-D world

    Publication Year: 1989 , Page(s): 584 - 585 vol.2
    Cited by:  Papers (1)
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    An experimental system was developed to examine the characteristics of spatial recognition. From several experiments, a mathematical model of estimated direction was produced. An algorithm based on the concept of population coding in the nervous system is being explored to construct a brain-style model of perceptual direction View full abstract»

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