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5152. Binary factorization in Hopfield-like neural networks: single-step approximation and computer simulations
- Creator:
- Frolov, A. A., Sirota, A. M., Húsek, D., Muraviev, I. P., and Polyakov, P. A.
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- nonlinear binary factor analysis, feature extraction, recurrent neural network, Single-Step approximation, neurodynamics simulation, attraction basins, Hebbian learning, unsupervised learning, neuroscience, and brain functions modeling
- Language:
- English
- Description:
- The unsupervised learning of feature extraction in high-dimesional patterns is a central problem for the neural network approach. Feature extraction is a procedure which maps original patterns into the feature (or factor) space of reduced dimension. In this paper we demonstrate that Hebbian learning in Hopfield-like neural network is a natural procedure for unsupervised learning of feature extraction. Due to this learning, factors become the attractors of network dynamics, hence they can be revealed by the random search. The neurodynamics is analysed by Single-Step approximation which is known [8] to be rather accurate for sparsely encoded Hopfield-network. Thus, the analysis is restricted by the case of sparsely encoded factors. The accuracy of Single-Step approximation is confirmed by Computer simulations.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
5153. Binary integer programming solution for troubleshooting with dependent actions
- Creator:
- Lín, Václav
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- binary integer programming and decision-theoretic troubleshooting
- Language:
- English
- Description:
- We deal with a sequencing problem that arises when there are multiple repair actions available to fix a broken man-made system and the true cause of the system failure is uncertain. The system is formally described by a probabilistic model, and it is to be repaired by a sequence of troubleshooting actions designed to identify the cause of the malfunction and fix the system. The task is to find a course of repair with minimal expected cost. We propose a binary integer programming formulation for the problem. This can be used to solve the problem directly or to compute lower bounds of the minimal expected cost using linear programming relaxation. We also present three greedy algorithms for computing initial feasible solutions.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
5154. Binary particle swarm optimization in classification
- Creator:
- Cervantes, Alejandro, Galván, Inés, and Isasi, Pedro
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- Evolutionary computation, particle swarm optimization, pattern classification, and swarm intelligence
- Language:
- English
- Description:
- Purpose of this work is to show that the Particle Swarm Optimization Algorithm may improve the results of some well known Machine Learning methods in the resolution of discrete classification problems. A binary version of the PSO algorithm is used to obtain a set of logic rules that map binary masks (that represent the attribute values), to the available classes. This algorithm has been tested both in a single pass mode and in an iterated mode on a well-known set of problems, called the MONKS set, to compare the PSO results against the results reported for that domain by the application of some common Machine Learning algorithms.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
5155. Binary segmentation and Bonferroni-type bounds
- Creator:
- Černý, Michal
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- Bonferroni inequality, segmentation statistic, and Z-function
- Language:
- English
- Description:
- We introduce the function Z(x;ξ,ν):=∫x−∞φ(t−ξ)⋅Φ(νt)dt, where φ and Φ are the pdf and cdf of N(0,1), respectively. We derive two recurrence formulas for the effective computation of its values. We show that with an algorithm for this function, we can efficiently compute the second-order terms of Bonferroni-type inequalities yielding the upper and lower bounds for the distribution of a max-type binary segmentation statistic in the case of small samples (where asymptotic results do not work), and in general for max-type random variables of a certain type. We show three applications of the method -- (a) calculation of critical values of the segmentation statistic, (b) evaluation of its efficiency and (c) evaluation of an estimator of a point of change in the mean of time series.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
5156. Binaural monopolar galvanic vestibular stimulation reduces body sway during human stance
- Creator:
- Křižková, M. and Hlavačka, F.
- Type:
- article, model:article, and TEXT
- Subject:
- galvanic stimulation, vestibular control of stance, and postural control
- Language:
- English
- Description:
- The influence of monopolar binaural galvanic stimulation of the vestibular system was studied on body sway. Subjects, with eyes closed, were standing on a hard support or on foam rubber. Their body sway was registered on a force platform at intervals of 50 s. Both polarities of direct current with intensity 1 mA were used as a galvanic stimulus during the whole recording interval. Changes of body sway amplitude and velocity were analyzed in situations with and without galvanic stimulation on two different support surfaces. In stance on the hard support, the cathodal polarization of labyrinths (in most subjects) reduced body sway velocity and decreased body sway slightly in the anteroposterior direction. Anodal polarization of labyrinths during 50 s did not affect the body sway parameters. The results on the foam rubber platform exhibited a significant reduction of body sway velocity induced by both anodal and cathodal polarization of the labyrinths. The decrease of body sway in the anteroposterior direction was also observed during cathodal polarization. The stabilizing effect of vestibular binaural monopolar stimulation on the upright stance was mainly observed in the postural control situation where the leg proprioceptive input was changed (stance on soft surface) and the role of vestibular input was more important.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
5157. Binding of phenylcyclohexylglycoloyl ester of hydroxyethyldimethylhydrazonium (compound VUFB-3113) to muscarinic receptors in rat heart, salivary gland and cerebral cortex
- Creator:
- Mysliveček jr., J. and Tuček, S.
- Type:
- article, model:article, and TEXT
- Subject:
- muscarinic receptors, heart, salivary gland, phenylcyclohexylglycoloyloxyethyldimethylhydrazonium, and brain cortex
- Language:
- English
- Description:
- Phenylcyclohexylglycoloylester of hydroxyethyldimethylhydrazonium (compound VGFB-3113) has been shown earlier to have a strong antimuscarinic effect on smooth muscle. Its affinity to muscarinic binding sites in homogenates of rat heart ventricles (M2 subtype), submandibular salivary gland (M3 subtype) and brain cortex (predominantly Ml subtype) has now been investigated in radioligand displacement experiments using (3H)quinuclidinyl benzilate ((3H)QNB) as a relatively non-specific muscarinic ligand. VGFB-3113 inhibited the binding of (3H)QNB with pKj values of 8.17, 8.73, and 8.52 in the heart, salivary gland, and brain cortex, respectively. It is concluded that the compound has a high affinity for muscarinic binding sites without strong preference for any of the Ml-M3 subtypes.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
5158. Bing Xin and Her Reception in Bohemia and Slovakia /
- Creator:
- Gálik, Marián,
- Subject:
- Xin, Bing,, Průšek, Jaroslav,, Šťovíčková, Dana,, Stolzová-Boušková, Marcela,, Häringová, Jarmila,, Jiang, Guangci,, spisovatelé čínští, ženy, vztahy československo-čínské, dějiny literatury, literatura čínská, orientalistika, sinologie, bohemisté čínští, recepce literatury, světové dějiny od r. 1918 do současnosti, Čína, Československo 1918-1992, literatura, spisovatelé, dějiny slavistiky, and dějiny věd o neslovanských oblastech
- Language:
- English
- Rights:
- unknown
5159. Bio-bibliographical yearbook 1994-1995 /
- Publisher:
- Institute of History,
- Type:
- ročenky
- Subject:
- Historická věda. Pomocné vědy historické. Archivnictví, instituce vědecké, historici čeští, bibliografie periodické, české a československé vědecké instituce a společnosti, vysoké školy, historiografie, vědecké projekty, and personální bibliografie
- Language:
- English
- Rights:
- unknown
5160. Bio-psycho-socio-filosofické spojení psychosomatiky. Příspěvek k identitě psychosomatika/y
- Creator:
- Poněšický, Jan
- Format:
- braille, electronic resource, remote, and elektronický zdroj
- Type:
- model:article, article, Text, statistics, and TEXT
- Subject:
- psychosomatické lékařství, psychofyziologie, spiritualita, reflex, posttraumatická stresová porucha, paměť, retence (psychologie), psychosomatické poruchy, epigeneze genetická, neurologické manifestace, sociální prostředí, duševní procesy, filosofie, and lidé
- Language:
- Czech and English
- Description:
- K běžnému bio-psycho-sociálnímu modelu zdraví a nem oci, přidává autor ve své úvaze filosofický aspekt. Klade si otázku, proč vlastně k ritizujeme Descarta za neřešitelnou karteziánskou podvojnost těla a duše, když jde skut ečně o dvě odlišné úrovně lidského žití? K plnému porozumění člověka, jenž je charakte rizován autopoezou a svobodnou volbou, patří i pochopení a smysl, čemuž odpovídají konotativní teorie. Zde se hodí k poznání vnitřního světa a chování druhého empatie, příběhy, obrazy, přirovnání a metafory, tak je třeba chápat i psychoanalytické te orie a interpretace., The author, in his essay, adds a philosophical asp ect to the current bio-psycho-social model of health and illness. The question “Why is D escartes criticized for intractable Cartesian duality of body and soul when it is reall y two different levels of human life?” is being raised. Both understanding and sense are i nvolved in full understanding of a human being, who is characterized by autopoiesis an d free choice, with which connotative theories correspond. Empathy, stories, images, similes and metaphors suit to the knowledge of the inner world and the behavio ur of the others. It is to be even understood psychoanalytic theories and interpretati ons., Poněšický J., and Literatura
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public