Wyniki wyszukiwania - Biblioteka Nauki

1

Zastosowanie sztucznych sieci neuronowych w cukrownictwie. Cz. 1: Budowa i działanie sztucznych sieci neuronowych

100%

Dobrowolski M. , Iciek J.

Zeszyty Naukowe. Chemia Spożywcza i Biotechnologia / Politechnika Łódzka

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2000

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tom Z. 64

35-50

PL

Celem artykułu jest wyjaśnienie podstaw budowy i funkcjonowania sztucznych sieci neuronowych. Struktura sieci neuronowych jest oparta czy podobna w swej istocie do struktury neuronów i wewnętrznych połączeń między nimi w organizmach żywych. Skutkiem tego podobieństwa są niezwykle interesujące właściwości sieci polegające na zdolności do uczenia się i w efekcie rozwiązywania postawionych przed sztuczną siecią neuronową zadań - również technicznych, których rozwiązanie jest często bardzo trudne czy wręcz niemożliwe. Przykłady takich i innych problemów przedstawiono w artykule. By wyjaśnić istotę procesu nauki i działania sieci neuronowych autorzy posłużyli się prostymi diagramami i wykresami do minimum ograniczając i upraszczając stosowany aparat matematyczny.

EN

The main goal of this article is to introduce the fundamentals of artificial neural networks. Their architectures are inspired by living beings' biological, neural structures. Such a structure topology leads to an interesting behavior such as "learning" and in the effect, to the possibility of solving many technical problems that are hard to be worked out, or are even insoluble in different ways. Some examples are included. To explain the essence of learning and neural networks running simple mathematics, algorithms and diagrams are used.

2

Comparative study of divers oscillators

75%

Karaliunas B. , Shulskis D.

Prace Instytutu Elektrotechniki

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2006

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tom Z. 226

19-44

EN

In this paper several classical neural oscillators (FitzHugh-Nagumo, Van der Pol, Hodgkin-Huxley) were studied. Although there are many known different oscillators, the Hodgkin-Huxley oscillator was more deeply investigated. Systems of two interconnected Hodgkin-Huxley neurons were also analyzed. Relationships between frequency and input current amplitude were found.

PL

Artykuł omawia kilka klasycznych oscylatorów neutralnych (FitzHug-Nagumo, Van der Pol, Hodgkin-Huxley). Jakkolwiek znanych jest wiele różnych oscylatorów, jednak oscylator Hodgkin-Huxley został zbadany dokładniej. Przeanalizowano też układy dwu połączonych neuronów Hodgkin-Huxley. Podano zależność częstotliwości od amplitudy prądu wejściowego.

3

Dopamine-dependent stimulus evaluation by nucleus accumbens neurons

71%

Nicola S. , Fields H. L.

Acta Neurobiologiae Experimentalis

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2005

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tom 65

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nr 5

4

Types of neurons of the claustrum in the rabbit - Nissl, Kluver-Barrera and Golgi studies

71%

Wasilewska B. , Najdzion J.

Folia Morphologica

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2001

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tom 60

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nr 1

EN

The studies were carried out on the claustrum of 8 adult rabbits. Four types of neurons were distinguished: 1. Multipolar neurons, which have dendritic trunks either with conus (multipolar polygonal perikarya) or without conus (multipolar rounded perikarya). Both subdivisions of the multipolar neurons have 3–6 dendritic trunks. Only some branches of these trunks have spines. An axon emerges mainly from the cell body, rarely from the initial part of the dendritic trunk. 2. Bipolar neurons with fusiform or rounded perikarya; they have two dendrites covered with spines. An axon originates directly from the cell body or from one of the dendritic trunks. 3. Triangular neurons, which have three dendritic branches with spines. An axon emerges directly from the soma, often near the primary dendritic trunk. 4. Pear-shaped neurons with one or two dendritic trunks arise from one pole of the cell body and with an axon that originates from the opposite side of the perikaryon. The dendrites are covered with spines.

5

Matrix metalloproteinases and their response to neuronal stimulation

71%

Kaczmarek L.

Cellular and Molecular Biology Letters

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2002

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tom 07

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nr Suppl.

6

The role of the NUR77 family of nuclear receptors in the signalling pathways of thymocytes and neurons

71%

Matuszyk J.

Cellular and Molecular Biology Letters

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2002

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tom 07

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nr Suppl.

7

Neurotransmitter receptors and the plasticity of the brain cortex

71%

Kossut M.

Cellular and Molecular Biology Letters

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2002

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tom 07

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nr Suppl.

8

Kappa opioid receptor expression and function in differentiating neurons and glial cells in culture

71%

Cserpan E. , Tryoen-Toth P. , Maderspach K.

Folia Histochemica et Cytobiologica. Supplement

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1997

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tom 35

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nr 2

9

Gangliosides in the repair of brain cholinergic neurons

71%

Oderfeld-Nowak B. , Casamenti F. , Pepeu G.

Acta Biochimica Polonica

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1993

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tom 40

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nr 3

10

The Neurevise - software for three-dimensional visualization and editing of neuron morphology data files

62%

Jarzina M. , Józefiak P. , Szulc M. , Rybarczyk A.

Poznan University of Technology Academic Journals. Electrical Engineering

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2010

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tom No. 63

69-78

EN

Neurevise is a brand new software solution, capable of displaying three-dimensional representations of neural cells, stored in text files with a standard "swc" extension. This paper describes its implementation, focusing on programming techniques and underlying technology responsible for displaying the three-dimensional image as well as the editing features. It also highlights the simple yet effective design of the customizable user interface, alternative input methods and stereoscopic rendering. Moreover, the article presents the ability of the application to correct errors in the neuron morphology descriptions, both automatically and on user's demand.

11

Nerve cells and synapses in the human foetal hypogastric nerves

62%

Bruska M.

Folia Morphologica

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2005

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tom 64

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nr 3

199-211

EN

The hypogastric nerves of a human foetus of 220 mm C-R length (23rd week) were investigated with an electron microscope. These nerves were composed mainly of bundles of unmyelinated fibres and single myelinated fibres. Small ganglia and single ganglion cells were observed in the hypogastric nerves. Light and dark cells were found among the nerve cells. The two types of cell differed in the number of ribosomes and the amount rough endoplasmic reticulum. In the period of development investigated protosynapses and mature synapses were observed in the hypogastric nerves.

12

Ultrastructure of neurons of the otic ganglion in mouse

62%

Kuder T. , Slovakova D. , Mraz P.

Zoologica Poloniae

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1995

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tom 40

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nr 1-4

13

Types of neurons of the subthalamic nucleus and zona incerta in the guinea pig - Nissl and Golgi study

62%

Robak A. , Bogus-Nowakowska K. , Szteyn S.

Folia Morphologica

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2000

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tom 59

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nr 2

EN

The studies were carried out on the subthalamus of adult guinea pigs. Golgi impregnation, Nissl and Klüver-Barrera methods were used for the study. In Nissl stained sections the subthalamic neuronal population consists of multipolar, fusiform, oval and pear-shaped perikarya. In two studied areas: nucleus subthalamicus (STN) and zona incerta (ZI) three types of neurons were distinguished. Type I, multipolar neurons with quadrangular, triangular or oval perikarya. They have 3–6 primary dendrites wich run slightly wavy and spread out in all directions. Type II, bipolar neurons with fusiform or semilunar perikarya, they have two primary dendrites. Type III, pear-shaped neurons with 1–2 dendritic trunks arising from one pole of the neuron. In all types of neurons axon emerges from the perikaryon or initial segment of a dendritic trunk and can be followed at a maximum distance of about 50 μm.

14

The neuronal structure of the mamillary nuclei in guinea pig: Nissl, Kluver-Barrera and Golgi studies

62%

Robak A.

Folia Morphologica

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2000

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tom 59

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nr 2

EN

The neurons of the mamillary body of adult guinea pigs were classified into four types: Type 1 — unidendritic cells with rounded perikarya (7–16 µm) and one thick primary dendrite, mostly dividing into tortuous secondary branches; Type 2 — bipolar cells: curly or simple ones with fusiform perikarya (13–22 µm); the curly-bipolar neurons possess 2 primary dendrites which may divide, even into tertiary dendrites, but each of them runs in screw-like or bending patterns; the simple-bipolar neurons have slender dendrites following a more straight route; Type 3 -multipolar cells with cap-like perikarya (10–20 µm) and 2–3 dendritic trunks originating from the base of the perikaryon and running in a wavy pattern; sometimes their dendrites possess spiny-like protrusions; Type 4 — multipolar cells with triangular or quadrangular perikarya (13–28 µm) and 3–4 dendritic trunks, poorly ramified, having a rather rectilinear course. In all types of neurons, dendritic spines are absent or rare. The majority of these neurons have a short impregnated axon originating from the perikaryon or primary dendrite.

15

Role of the subplate neurons in specification of neocortical areas

62%

Wozniak W.

Folia Morphologica

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1995

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tom 54

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nr 3

16

Differentiation of neurons populations based on fractal dimension

62%

Skrzat J. , Usarz M. , Trabka J. , Goncerz G.

Folia Morphologica

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1996

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tom 55

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nr 4

17

The types of neurons in the claustrum of Bison bonasus: Nissl and Golgi study

62%

Rowniak M. , Szteyn S. , Robak A. , Klawon M.

Folia Morphologica

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1994

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tom 53

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nr 4

18

The cellular architecture of the pterygopalatine ganglion of Syrian hamster [Mesocricetus auratus W. 1839]

62%

Kuder T. , Szczurkowski A.

Zoologica Poloniae

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1996

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tom 41

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nr 1-4

19

Electrophysiological studies on the mechanisms determining the kinetics and pharmacological modulation of GABAergic synaptic transmission

62%

Mozrzymas J. W.

Cellular and Molecular Biology Letters

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2002

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tom 07

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nr Suppl.

20

Gnostic cells in the 21st century

62%

Quiroga R. Q.

Acta Neurobiologiae Experimentalis

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2013

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tom 73

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nr 4