Summary form only given, as follows. neuralnetwork models are reviewed from the point of view of parallel distributedprocessing models. More specifically, the interactions between neural models and the computational...
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Summary form only given, as follows. neuralnetwork models are reviewed from the point of view of parallel distributedprocessing models. More specifically, the interactions between neural models and the computational model implemented by transputer-based machines are identified so as to define a general strategy for mapping neuralnetworks onto transputers, and therefore achieving the design and a prototype of a neuralnetwork mapper for transputer-based machines.< >
Key elements of an automated damage assessment (ADA) will include ground-based sensors to survey and measure postattack damages, communication networks to link sensors, a survival recovery center (SRC), a runway repai...
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Key elements of an automated damage assessment (ADA) will include ground-based sensors to survey and measure postattack damages, communication networks to link sensors, a survival recovery center (SRC), a runway repair team (or robots) for rapid response, and advanced signal processors to perform the 'search and optimization' processes for the 'best' airbase recovery plan. To meet the USAF ADA requirements, ITT Avionics has proposed the development of a hybrid signal processor. The system will consist of algorithmic processors and neuralnetworks. To improve DA performance, key DA functions are implemented by neuralnetworks. Due to the intrinsic nature of distributedprocessing power, the neuralnetwork not only provides the high throughput required for DA but it also achieves fault tolerance and graceful degradation, which are extremely important for the Rapid Runway Repair program.< >
An efficient parallel simulation algorithm is described for a multilayered neuralnetwork with a backpropagation learning procedure on a distributed-memory multiprocessor with ring connection. Each layer is divided in...
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An efficient parallel simulation algorithm is described for a multilayered neuralnetwork with a backpropagation learning procedure on a distributed-memory multiprocessor with ring connection. Each layer is divided into P disjoint blocks and each block is mapped on each processor of a P-processor system. The parallel simulation using this algorithm has been implemented on a system of transputers with ring connection, and the time complexity of both calculation and communication is analyzed. It is shown that the algorithm can provide high efficiency on a multiprocessor system which has a large number of processors connected in a ring.< >
A three-layer dynamical neuralnetwork with feedback and recurrent connections is proposed for nonlinear input-output mapping applications. A simple-to-implement distributed learning scheme is developed, and convergen...
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A three-layer dynamical neuralnetwork with feedback and recurrent connections is proposed for nonlinear input-output mapping applications. A simple-to-implement distributed learning scheme is developed, and convergence properties of the training procedure are established. Application of the network architecture and the learning scheme to the identification of the dynamics of a nonlinear system is made, and a performance evaluation is given.< >
The author proposes a novel hybrid combination of networks for the processing of spatio-temporal patterns. While the instantaneous spatial components of patterns are translated into firing intensities of 'grandmot...
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The author proposes a novel hybrid combination of networks for the processing of spatio-temporal patterns. While the instantaneous spatial components of patterns are translated into firing intensities of 'grandmother' cells, the temporal sequence of patterns is mapped into intensities of so-called TIM (time-intensity-mapping) cells. The TIM cells generate a corresponding (spatially distributed) activity pattern which in turn is processed by another set of grandmother cells. The feasibility of the approach is demonstrated by using temporal sequences of letters. The robustness against distortions of transient pattern sequences is remarkable and may lead to applications of the TIM network in speech recognition.< >
A two-stage neuralnetwork is described for transformation-invariant visual pattern recognition. In the first stage, features are extracted after normalizing the image. It is shown how parameters of spatial transforma...
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A two-stage neuralnetwork is described for transformation-invariant visual pattern recognition. In the first stage, features are extracted after normalizing the image. It is shown how parameters of spatial transformation can be estimated even in the presence of noise by using knowledge about rigid objects. Circular arcs in the normalized image are used as generalized features to describe the input pattern. Each image pixel contributes to the features which it can constitute. Contributions from noisy pixels are distributed over the feature space, whereas meaningful parts contribute to clusters that correspond to features of the image. In the second stage, the image is classified on the basis of these features by a multilayer perceptron network trained using a backpropagation algorithm.< >
The authors investigate the parallel simulation of the Hopfield model on a digital computer with a multiprocessor. The synchronous and parallel mode of simulation may result in the oscillation of the network, so they ...
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The authors investigate the parallel simulation of the Hopfield model on a digital computer with a multiprocessor. The synchronous and parallel mode of simulation may result in the oscillation of the network, so they suggest a serial update and parallel evaluation policy, which results in the speedup being proportional to the number of processors used while the convergence of the network is guaranteed. A mapping to a message passing multiple-instruction/multiple-data (MIMD) multiprocessor to reduce the computation time is proposed, and two updating sequences of neurons in the multiprocessor are compared and analyzed.< >
The architecture of a multiprocessor machine designed specifically for simulating large digital neuralnetworks is described. The single-input multiple data (SIMD) machine comprises a host computer for high-level cont...
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The architecture of a multiprocessor machine designed specifically for simulating large digital neuralnetworks is described. The single-input multiple data (SIMD) machine comprises a host computer for high-level control and software development, a network controller which has data distribution and control responsibilities, and multiple processor arrays which carry out most of the computation for the network. Each processor array comprises a high-performance reduced instruction set computer (RISC) as a controller and 20 processing elements, each of which consist of a custom VLSI floating point processor and 1.5 Mbytes of private high-speed memory. The peak processing rate for a single processor array is 500 MFLOPS which can be sustained for relatively long vectors.< >
The author presents the ASP (associative string processor) a massively parallel, programmable, fault-tolerant architecture, which can efficiently support low-MIMD/high-SIMD and other parallel computation paradigms by ...
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The author presents the ASP (associative string processor) a massively parallel, programmable, fault-tolerant architecture, which can efficiently support low-MIMD/high-SIMD and other parallel computation paradigms by providing comprehensive cover of both numeric and symbolic processing, supporting content-addressing, and a dynamically reconfigurable rich-in-connectivity interprocessor communication network. The efficient implementation of a neuralnetwork model (i.e. the backpropagation model) on the ASP is addressed and its performance, at a computational rate of 10/sup 9/ interconnections per second (i.e. 10/sup 9/ Giga-interconnections/s), is reported.< >
The authors show how to synthesize, given a Bayesian network description of a probability distribution, an instance of P. Smolensky's harmony network (1986) that computes maximum-likelihood completions to partial ...
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The authors show how to synthesize, given a Bayesian network description of a probability distribution, an instance of P. Smolensky's harmony network (1986) that computes maximum-likelihood completions to partial value assignments, according to the given distribution. As an application, they present a scheme for translating a high-level description of a conceptual hierarchy, with default values and exceptions, to a harmony network representation, which is then inherently capable of quite complicated query processing. Finally, the authors discuss their experience with implementing such a translation scheme.< >
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