Abstract:
:A new association scheme which can still recall appropriate data when some key elements are missing (blank) is presented. The traditional associative memory models are designed to deal with complete (memorized) keys, but in the real world, key elements are often missing due to error, equipment failure, observation difficulty, etc. The traditional models, in this case, can not have an optimal association except for special cases. When an incomplete key containing blanks is given, we wish to get the same data, as nearly as possible, as would be obtained with the complete key. In this paper, the optimal associative memory model which operates with partly missing keys is proposed. The model is constructed on the basis of the theory of the pseudoinverse of matrices. Even from the incomplete keys which contain a large percentage of blanks, the model recalls the appropriate data optimally under the MSE criterion. From the results of computer simulations, we can show that the model has the expected ability.
journal_name
Biol Cybernjournal_title
Biological cyberneticsauthors
Murakami K,Aibara Tdoi
10.1007/BF00317975subject
Has Abstractpub_date
1982-01-01 00:00:00pages
151-5issue
2eissn
0340-1200issn
1432-0770journal_volume
44pub_type
杂志文章abstract::The myoskeletal inverse dynamics problem and the myocybernetic control inverse problem were investigated with respect to their ill-posedness. The first problem consists of finding from observed experimental motion and reaction force data the resultant muscle moments that generated the observed motion, while the second...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/s004220050013
更新日期:2000-02-01 00:00:00
abstract::Panoramic image differences can be used for view-based homing under natural outdoor conditions, because they increase smoothly with distance from a reference location (Zeil et al., J Opt Soc Am A 20(3):450-469, 2003). The particular shape, slope and depth of such image difference functions (IDFs) recorded at any one p...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/s00422-007-0147-3
更新日期:2007-05-01 00:00:00
abstract::This article presents the use of continuous dynamic models in the form of differential equations to describe and predict temporal changes in biological processes and discusses several of its important advantages over discontinuous bistable ones, exemplified on the stick insect walking system. In this system, coordinat...
journal_title:Biological cybernetics
pub_type: 杂志文章,评审
doi:10.1007/s00422-011-0446-6
更新日期:2011-07-01 00:00:00
abstract::According to modern views of the cerebellum in motor control, each cerebellar functional unit, or microzone, learns how to execute predictive and coordinative control, based on long-term depression of the granule cell-Purkinje cell synapses. In the present paper, in light of recent experimental and theoretical studies...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/s004220050462
更新日期:1998-08-01 00:00:00
abstract::We propose a model for the first stage of the cortical transformation of the visual image based on the principle that the cortex encodes the information with the minimum number of channels mathematically needed. We restrict our model to be consistent with the data on size adaptations, the known relationships of acuity...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/BF00336972
更新日期:1982-01-01 00:00:00
abstract::This paper concerns the processing of the outputs of the two opponent-color mechanisms in the human visual system. We present experimental evidence that opponent-color signals interact after joint modulation even though they are essentially independent under neutral steady adaptation and after exclusive modulation of ...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:
更新日期:1993-01-01 00:00:00
abstract::The response of a healthy lateral eye of Limulus to constant, uniform and sufficiently intense light stimulation, consists of a sustained oscillatory discharge, all ommatidia firing synchronously in bursts, at intervals of about 0.2s (Barlow and Fraioli, 1978). This response has been analysed by a computer simulation,...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/BF00336944
更新日期:1980-01-01 00:00:00
abstract::Trajectories in human aimed movements are inherently variable. Using the concept of positional variance profiles, such trajectories are shown to be decomposable into two phases: In a first phase, the variance of the limb position over many trajectories increases rapidly; in a second phase, it then decreases steadily. ...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/s00422-020-00853-7
更新日期:2020-12-01 00:00:00
abstract::Experimental studies have shown that responses of ventral intraparietal area (VIP) neurons specialize in head movements and the environment near the head. VIP neurons respond to visual, auditory, and tactile stimuli, smooth pursuit eye movements, and passive and active movements of the head. This study demonstrates ma...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/s00422-012-0491-9
更新日期:2012-07-01 00:00:00
abstract::The previous companion paper describes the initial (seed) schema architecture that gives rise to the observed prey-catching behavior. In this second paper in the series we describe the fundamental adaptive processes required during learning after lesioning. Following bilateral transections of the hypoglossal nerve, an...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/s00422-005-0014-z
更新日期:2005-12-01 00:00:00
abstract::The aim of this paper is to summarize and to compare some known mathematical models of orientation perception in random dot patterns and to propose new solutions of this question. The model adequacy is judged from the previously obtained experimental results. Apart from the models based on some simple function of the ...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/BF00202455
更新日期:1990-01-01 00:00:00
abstract::We present a procedure that optimally adjusts specified parameters of a mathematical model to describe a set of measured data. The technique integrates a dynamic systems-simulation language with a robust algorithm for nonlinear parameter estimation, and it can be implemented on a microcomputer. Sensitivity functions a...
journal_title:Biological cybernetics
pub_type: 杂志文章,评审
doi:10.1007/BF00201441
更新日期:1990-01-01 00:00:00
abstract::This paper describes how a synergy made up of a pair of agonist and antagonist systems involved in the production of a rapid movement can control movement time. A quadratic law is derived to predict the movement time as a function of the various parameters describing the neuromuscular synergy. Conditions for a simplif...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/BF00202786
更新日期:1995-01-01 00:00:00
abstract::Many neurons at the sensory periphery receive periodic input, and their activity exhibits entrainment to this input in the form of a preferred phase for firing. This article describes a modeling study of neurons which skip a random number of cycles of the stimulus between firings over a large range of input intensitie...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/BF00198810
更新日期:1994-01-01 00:00:00
abstract::In a seminal paper, Witkin (1981) derived a model of surface slant and tilt recovery based on the statistics of the orientations of texture elements (texels) on a planar surface. This model made use of basic mathematical properties of probability distributions to formulate a posterior distribution on slant and tilt gi...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/s00422-010-0389-3
更新日期:2010-09-01 00:00:00
abstract::Sixty subjects were tested to assign orientation to ten dot patterns differing in their overall form and the number of dots in the pattern. The patterns were presented in four different positions in the visual field and their orientation was estimated in two ways. It was demonstrated that the assignment of orientation...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/BF00335157
更新日期:1981-01-01 00:00:00
abstract::The stoichiometric and kinetic details of transmitter-receptor interaction (the number of conformations and the rate constants of conformation changes( in synaptic transmission have been investigated analyzing postsynaptic membrane noises by the aid of the fluctuation-dissipation theorem of stochastic chemical kinetic...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/BF00337450
更新日期:1979-02-02 00:00:00
abstract::One of the major goals in cellular neurobiology is the meaningful cell classification. However, in cell classification there are many unresolved issues that need to be addressed. Neuronal classification usually starts with grouping cells into classes according to their main morphological features. If one tries to test...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/s00422-011-0426-x
更新日期:2011-03-01 00:00:00
abstract::Synchronization properties of locally coupled neural oscillators were investigated analytically and by computer simulation. When coupled in a manner that mimics excitatory chemical synapses, oscillators having more than one time scale (relaxation oscillators) are shown to approach synchrony using mechanisms very diffe...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/BF00198772
更新日期:1993-01-01 00:00:00
abstract::Multiplying memory span by mental speed, we obtain the information entropy of short-term memory capacity, which is rate-limiting for cognitive functions and corresponds with EEG power spectral density. The number of EEG harmonics (n = 1, 2,..., 9) is identical with memory span, and the eigenvalues of the EEG impulse r...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/BF00201438
更新日期:1992-01-01 00:00:00
abstract::Two different chaotic time series analysis methods--the correlation dimension and nonlinear forecasting--are introduced and then used to process the interspike intervals (ISI) of the action potential trains propagated along a single nerve fiber of the anesthetized rat. From the results, the conclusion is drawn that co...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/s004220050422
更新日期:1998-02-01 00:00:00
abstract::The Hodgkin-Huxley equations with a slight modification are investigated, in which the inactivation process (h) of sodium channels or the activation process of potassium channels (n) is slowed down. We show that the equations produce a variety of action potential waveforms ranging from a plateau potential, such as in ...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/PL00007996
更新日期:2001-07-01 00:00:00
abstract::This paper introduces a theoretical frame-work for characterizing and classifying simple parallel algorithms and systems with many inputs, for example an array of photoreceptors. The polynomial representation (Taylor series development) of a large class of operators is introduced and its range of validity discussed. T...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/BF00355455
更新日期:1980-01-01 00:00:00
abstract::Firing-rate models describing neural-network activity can be formulated in terms of differential equations for the synaptic drive from neurons. Such models are typically derived from more general models based on Volterra integral equations assuming exponentially decaying temporal coupling kernels describing the coupli...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/s00422-007-0167-z
更新日期:2007-09-01 00:00:00
abstract::Highly-interconnected networks of nonlinear analog neurons are shown to be extremely effective in computing. The networks can rapidly provide a collectively-computed solution (a digital output) to a problem on the basis of analog input information. The problems to be solved must be formulated in terms of desired optim...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/BF00339943
更新日期:1985-01-01 00:00:00
abstract::Models built using mean data can represent only a very small percentage, or none, of the population being modeled, and produce different activity than any member of it. Overcoming this "averaging" pitfall requires measuring, in single individuals in single experiments, all of the system's defining characteristics. We ...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/s00422-012-0530-6
更新日期:2012-11-01 00:00:00
abstract::In the neural superposition eye of a dipteran fly every ommatidium has eight photoreceptors, each associated with a rhabdomere, two central and six peripheral, which altogether result in seven functional light guides. Groups of eight rhabdomeres in neighboring ommatidia have largely overlapping fields of view. Based o...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/s00422-006-0097-1
更新日期:2006-11-01 00:00:00
abstract::The contrast threshold elevation effect has been measured for one dimensional (grating) and for two dimensional (spot) stimulus patterns. It has been shown previously (Burton and Ruddock, 1978) that such stimuli elicit, respectively, non-length-selective and length-selective adaptation effects. It is established that,...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/BF00337369
更新日期:1978-11-10 00:00:00
abstract::In the current research, the muscle equivalent linear damping coefficient which is introduced as the force-velocity relation in a muscle model and the corresponding time constant are investigated. In order to reach this goal, a 1D skeletal muscle model was used. Two characterizations of this model using a linear force...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/s00422-016-0680-z
更新日期:2016-02-01 00:00:00
abstract::This report demonstrates the effectiveness of two processes in constructing simple feedforward networks which perform good transformations on their inputs. Good transformations are characterized by the minimization of two information measures: the information loss incurred with the transformation and the statistical d...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/BF00202569
更新日期:1993-01-01 00:00:00