scholarly journals Research on Network Model of Dentate Gyrus Based on Bionics

2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Jin Zhang ◽  
Xiaoping Wei ◽  
Shiwen Zhang ◽  
Xin Niu ◽  
Guang Li ◽  
...  
Keyword(s):  
Dentate Gyrus ◽  
Network Model ◽  
Small World ◽  
Calculation Model ◽  
Pathological State ◽  
The Real ◽  
Quantitative Classification ◽  
Stimulus Response ◽  
Definition Of ◽  
Improved Model

As an important part of the brain, the dentate gyrus has an irreplaceable effect in the process of memory generation. Therefore, the study of the dentate gyrus model has important significance in the study of brain function. This paper, combined with the real anatomical structure of the dentate gyrus, is based on the existing calculation model for studying the pathological state of the dentate gyrus, a network model of dentate gyrus based on bionics. Then, a simulation experiment on the normal dentate gyrus model is performed on the NEURON platform, the output of each neuron in the model is observed, and a conclusion that the improved model can respond to stimuli, generate action potentials, and transmit them along with the neural network is made. At the same time, the output results are compared with the existing pathological models, and the characteristics of the stimulus response between neurons in the dentate gyrus under normal physiological conditions are obtained. Finally, according to the semiquantitative classification definition and quantitative classification definition of the small-world network, the model is analyzed, and it is concluded that the improved dentate gyrus network model has small-world characteristics. Therefore, the neurons in the improved dentate gyrus model are tightly connected and can simulate the real dentate gyrus to a certain extent.

Three-layered supernetwork evolution model and the application for China-world's top 500 enterprises supernetwork

2014 ◽  
Vol 25 (05) ◽  
pp. 1440003 ◽  
Author(s):  
Qiang Liu ◽  
Jin-Qing Fang ◽  
Yong Li
Keyword(s):  
Real World ◽  
Small World ◽  
Evolution Model ◽  
The Real ◽  
Network Characteristics ◽  
Scale Free ◽  
Relevant Theory ◽  
Free Model ◽  
Cooperative Competition ◽  
Definition Of

Network of network (NON) or so-called supernetwork extensively exists in the real world. However, so far the definition of NON is not mutually recognized, relevant theory is rather lacking. In order to reveal certain characteristics of NON, we proposed four kinds of three-layered supernetwork evolution models (TLSEM) based on WS small-world and BA scale-free model, and defined two kinds of layer cross-degrees as new measures of cooperative-competition relationship for different layer nodes. The idea and methods of TLSEM are applied to the construction and analysis of China-world's top 500 enterprises supernetworks as a typical empirical example. The analytical results show that the layer cross-degree is better description than other network characteristics, and TLSEM may lay a certain foundation and extend to study more multilevel supernetworks.

scholarly journals Sublinear domination and core–periphery networks

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Marios Papachristou
Keyword(s):  
Network Model ◽  
Power Law ◽  
Real World ◽  
Random Network ◽  
Small World ◽  
The Core ◽  
Entire Network

AbstractIn this paper we devise a generative random network model with core–periphery properties whose core nodes act as sublinear dominators, that is, if the network has n nodes, the core has size o(n) and dominates the entire network. We show that instances generated by this model exhibit power law degree distributions, and incorporates small-world phenomena. We also fit our model in a variety of real-world networks.

Small World Network Model Validation. Case Study of Suartone Historical Fire in Corsica

2021 ◽  
pp. 1-16
Author(s):  
N. Hamamousse ◽  
A. Kaiss ◽  
F. Giroud ◽  
N. Bozabalian ◽  
J-P. Clerc ◽  
...  
Keyword(s):  
Model Validation ◽  
Network Model ◽  
Small World ◽  
Small World Network

Evaluation of a calculation model to estimate the impact of the COVID-19 pandemic lockdown on visual acuity in neovascular AMD

2021 ◽  
pp. 112067212110523
Author(s):  
Martin Stattin ◽  
Anna-Maria Haas ◽  
Daniel Ahmed ◽  
Alexandra Graf ◽  
Katharina Krepler ◽  
...  
Keyword(s):  
Visual Acuity ◽  
Real Life ◽  
Treatment Interruption ◽  
Term Treatment ◽  
Calculation Model ◽  
Life Outcomes ◽  
Short Term ◽  
Short Term Treatment ◽  
The Real ◽  
The Impact

Purpose A model was calculated during the first Austrian coronavirus disease-2019 (COVID-19) pandemic lockdown to estimate the effect of a short-term treatment interruption due to healthcare restrictions on visual acuity (VA) in neovascular age-related macular degeneration (nAMD). The model was compared to the real-life outcomes before treatment re-started. Methods Retrospective data-collection of 142 eyes in 142 patients receiving repeated intravitreal injections with anti-VEGF at a retina unit in Vienna in a personalized pro-re-nata regimen prior to the COVID-19 associated lockdown, when treatment was deferred between March 16 and May 4, 2020. During the lockdown, the preliminary data was integrated into pre-existing formulae based on the natural course of the disease in untreated eyes in the long term. Patients were re-scheduled and treated after gradually opening operating rooms. The calculation model was compared to the effective VA change. Results The model calculated an overall VA loss of 3.5 ± 0.8 letters early treatment diabetes retinopathy study (ETDRS) ( p < 0.001 [95% CI:3.3;3.6]) on average compared to 2.5 ± 6 letters ETDRS ( p < 0.001 [95% CI:1.5;3.5]) as measured with a mean treatment delay of 61 ± 14 days after previously scheduled appointments. The total difference between the model exercise and the real-life outcomes accounted for 1 ± 5.9 letters ETDRS ( p = 0.051 [95% CI: 0.1;1.9]). Conclusion The herein presented calculation model might not be suitable to estimate the effective VA loss correctly over time, although untreated eyes and eyes under therapy show similarities after short-term treatment interruption. However, this study demonstrated the potentially negative impact of the COVID-19 pandemic lockdown on patients compromised by nAMD.

scholarly journals Imagology of Iranians in One Thousand Nights and One Night

2016 ◽  
Vol 4 (1) ◽  
pp. 74
Author(s):  
Ehsan Ghabool ◽  
Mina Ravansalar
Keyword(s):  
Comparative Literature ◽  
Literary Work ◽  
Real Image ◽  
Economic Prosperity ◽  
Literary Works ◽  
Arabic Translation ◽  
The Real ◽  
Similarities And Differences ◽  
Definition Of

Imagology is a branch of comparative literature which explores the image of one nation in the literature of another nation. One Thousand Nights and One Night is among the important books which can show the image of different nations and people such as Indians, Iranians and Arabs. Since the oldest version of the book is in Arabic, it is considered an Arabic literary work though it was translated from a Persian tale in the first place. On this basis the study of the image of Iranians in One Thousand Nights and One Night can be included under the definition of imagology. In this article, first we explain, analyze and study the image of Iranians in the book One Thousand Nights and One Night with respect to 1. anthropology (including entertainments, personification of animals, disapprobation of lies and betrayal of spouses), 2. religious and mythical beliefs (including the belief in daevas and jinnis, magic, fire-worshipping and similar plots), 3. politics (emphasizing the position of vizier and his family in government), 4. economics (emphasizing economic prosperity), then we will compare the collected information with the image of Iranians in credited works and in this way we will identify the similarities and differences of Iranians’ image in One Thousand Nights and One Night and the above-said literary works. Finally we come to this conclusion that the similarities belong to the real image of Iranians in the pre-Islamic days and that differences show the image of post-Islamic Iran which is added through Arabic translation.

scholarly journals Some remarks on incomplete gamma type function γ*(α, x_)

Filomat ◽  
2015 ◽  
Vol 29 (1) ◽  
pp. 125-131 ◽  
Author(s):  
Emin Özcağ ◽  
İnci Egeb
Keyword(s):  
Recurrence Relation ◽  
Real Line ◽  
Summable Function ◽  
Type Function ◽  
The Real ◽  
Definition Of ◽  
Derivatives Of

The incomplete gamma type function ?*(?, x_) is defined as locally summable function on the real line for ?>0 by ?*(?,x_) = {?x0 |u|?-1 e-u du, x?0; 0, x > 0 = ?-x_0 |u|?-1 e-u du the integral divergining ? ? 0 and by using the recurrence relation ?*(? + 1,x_) = -??*(?,x_) - x?_ e-x the definition of ?*(?, x_) can be extended to the negative non-integer values of ?. Recently the authors [8] defined ?*(-m, x_) for m = 0, 1, 2,... . In this paper we define the derivatives of the incomplete gamma type function ?*(?, x_) as a distribution for all ? < 0.

scholarly journals Problemy z granicami wypowiedzeń w polszczyźnie mówionej – uwagi wstępne

2015 ◽  
Author(s):  
Michał Szczyszek
Keyword(s):  
Spoken Language ◽  
Specific Task ◽  
The Real ◽  
Definition Of ◽  
Task Oriented ◽  
Theoretical Reflection ◽  
Innovative Concept

The article discusses the problems associated with segmented into separate sentences the stream of spoken language. There are both: theoretical problems (what is utterance?, what are its boundaries?, what are the theoretical proposals for the segmentation of utterances?), and practical problems (where is the real border between the two utterances in spoken language?, what criteria of segmentation stream of spoken language can be used?). The language material – which is the basis for the research presented in this article – comes from twenty task-oriented dialogue sessions with the participation of forty speakers performing a specific task. As a result of the analysis, based on available positions and theoretical reflection I managed to develop a tool for syntactical segmentation of the stream of spoken language. This tool can be presented in the form of a new (innovative) concept of definition of the utterance.

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