scholarly journals SELF ORGANIZING NEURAL MAPS IN THE PROBLEMS OF ECOLOGICAL MONITORING

2021 ◽  
pp. 112-117
Author(s):  
O. Getmanets ◽  
M. Pelikhatyi
Keyword(s):  
Finite Number ◽  
Environmental Pollution ◽  
Background Radiation ◽  
Ecological Monitoring ◽  
Abiotic Factor ◽  
Radiation Dose Rate ◽  
Continuous Map ◽  
And Cluster Analysis ◽  
Neural Maps ◽  
Self Organizing

There is a certain problem in ecological monitoring of the environment state according to the measured values of a certain abiotic factor. Namely, how to build a continuous map of environmental pollution throughout the controlled area, based on the results of measurements carried out at a finite number of points inside the controlled territory. The aim of the work is to study the possibility of using the method of self organizing neural maps (SOM) for the problems of the ecological monitoring of the environment, and specifically for building an accurate continuous map of environmental pollution on the ground. The materials and methods of researches are the results of measurements the ambient equivalent of the continuous X-ray and gamma radiation dose rate on a territory of the historical center of Kharkiv has been used as research materials; processing of the obtained data by SOM's methods using MatLab 8.1 and STATISTICA 10 computer programs has been done. Results: in the process of 1000 self-learning cycles of a neural network of 100 initial active neurons randomly located on the controlled area map, 25 neural clusters have been obtained, the coordinates of the centers of which practically coincided with the 25 control points coordinates. A continuous map of the background radiation on the controlled area has been built. The accuracy of this map was no worse than 0.25 μR/hour. Conclusions: the possibility of using the SOM methods to build a continuous map of the level of environmental pollution on the ground based on the results of measuring the values of a certain abiotic factor in a finite number of points has been proven. It has been proven that this method is more accurate compared to the methods of regression mapping and cluster analysis, from which it is essentially different. The possibilities for a significant improvement in the accuracy of the method lie in increasing the number of initial neurons on the terrain map and the number of iterations during their training.

scholarly journals A function space from a compact metrizable space to a dendrite with the hypo-graph topology

2015 ◽  
Vol 13 (1) ◽  
Author(s):  
Hanbiao Yang ◽  
Katsuro Sakai ◽  
Katsuhisa Koshino
Keyword(s):  
Finite Number ◽  
Function Space ◽  
Metrizable Space ◽  
Vietoris Topology ◽  
Hilbert Cube ◽  
Graph Topology ◽  
Closed Sets ◽  
Continuous Map ◽  
Compact Metrizable Space ◽  
Isolated Points

Abstract Let X be an infinite compact metrizable space having only a finite number of isolated points and Y be a non-degenerate dendrite with a distinguished end point v. For each continuous map ƒ : X → Y , we define the hypo-graph ↓vƒ = ∪ x∈X {x} × [v, ƒ (x)], where [v, ƒ (x)] is the unique arc from v to ƒ (x) in Y . Then we can regard ↓v C(X, Y ) = {↓vƒ | ƒ : X → Y is continuous} as the subspace of the hyperspace Cld(X × Y ) of nonempty closed sets in X × Y endowed with the Vietoris topology. Let be the closure of ↓v C(X, Y ) in Cld(X ×Y ). In this paper, we shall prove that the pair , ↓v C(X, Y )) is homeomorphic to (Q, c0), where Q = Iℕ is the Hilbert cube and c0 = {(xi )i∈ℕ ∈ Q | limi→∞xi = 0}.

scholarly journals Spatial distribution and cluster analysis of dengue using self organizing maps in Andhra Pradesh, India, 2011–2013

2018 ◽  
Vol 3 (1) ◽  
pp. 52-61 ◽  
Author(s):  
Srinivasa Rao Mutheneni ◽  
Rajasekhar Mopuri ◽  
Suchithra Naish ◽  
Deepak Gunti ◽  
Suryanarayana Murty Upadhyayula
Keyword(s):  
Cluster Analysis ◽  
Spatial Distribution ◽  
Andhra Pradesh ◽  
Self Organizing Maps ◽  
And Cluster Analysis ◽  
Self Organizing

A Low‐cost Scheme for Local Radiation Monitoring

1993 ◽  
Vol 2 (3) ◽  
Author(s):  
D.G. Moule
Keyword(s):  
Cost Effectiveness ◽  
Background Radiation ◽  
Low Cost ◽  
Public Information ◽  
Radiation Monitoring ◽  
Radioactive Material ◽  
Public Concern ◽  
Radiation Dose Rate ◽  
The United Kingdom ◽  
Local Radiation

The response to the deposition of radioactive material over the United Kingdom from Chernobyl, in 1986, demonstrated the inadequacy of arrangements at that time for the monitoring of radiation and the subsequent dissemination of public information and advice. As a result, a low cost scheme for local radiation monitoring was developed in Surrey, using two forms of monitoring: environmental monitoring of background radiation dose rate, and monitoring of radioactivity in food and non‐food products. The scheme commenced operation in April 1990 and the results for the first three years are presented. Details of costs are examined and conclusions drawn as to the scientific credibility and cost effectiveness of the scheme. Results show that radiation levels in Surrey are of low radiological significance and that none of the results gives any cause for public concern.

scholarly journals Estimates by gap potentials of free homotopy decompositions of critical Sobolev maps

2019 ◽  
Vol 9 (1) ◽  
pp. 1214-1250
Author(s):  
Jean Van Schaftingen
Keyword(s):  
Riemannian Manifold ◽  
Finite Number ◽  
Homotopy Group ◽  
Compact Riemannian Manifold ◽  
A Priori ◽  
Homotopy Classes ◽  
Continuous Map ◽  
Homotopy Decomposition ◽  
Sobolev Maps ◽  
Finite Set

Abstract A free homotopy decomposition of any continuous map from a compact Riemannian manifold 𝓜 to a compact Riemannian manifold 𝓝 into a finite number maps belonging to a finite set is constructed, in such a way that the number of maps in this free homotopy decomposition and the number of elements of the set to which they belong can be estimated a priori by the critical Sobolev energy of the map in Ws,p(𝓜, 𝓝), with sp = m = dim 𝓜. In particular, when the fundamental group π1(𝓝) acts trivially on the homotopy group πm(𝓝), the number of homotopy classes to which a map can belong can be estimated by its Sobolev energy. The estimates are particular cases of estimates under a boundedness assumption on gap potentials of the form $$\begin{array}{} \displaystyle \iint\limits_{\substack{(x, y) \in \mathcal{M} \times \mathcal{M} \\ d_\mathcal{N} (f (x), f (y)) \ge \varepsilon}} \frac{1}{d_\mathcal{M} (y, x)^{2 m}} \, \mathrm{d} y \, \mathrm{d}x. \end{array}$$ When m ≥ 2, the estimates scale optimally as ε → 0. When m = 1, the total variation of the maps appearing in the decomposition can be controlled by the gap potential. Linear estimates on the Hurewicz homomorphism and the induced cohomology homomorphism are also obtained.

BIOLOGICAL ECONOMICAL ASPECTS OF USAGE OF QUANTUM BLOCKCHAIN-STEGANOGRAPHY FOR ECOLOGICAL MONITORING AND PREVENTION OF REGIONAL ENVIRONMENTAL POLLUTION WITH THE APPLICATIONS OF UNMANNED COMPLEXES AND PILOTED SYSTEMS

2020 ◽  
pp. 321-323
Keyword(s):  
Environmental Pollution ◽  
Ecological Monitoring ◽  
Ecological Situation ◽  
Data Treatment ◽  
Federal Districts

The biological economical products for quantum blockchain-steganography for analyzing of ecological situation in the regions, operating ecological monitoring in the Federal Districts and prevention of regional environmental pollution are presented. Quantum blockchain-steganography is used for unmanned complexes and piloted systems data treatment

scholarly journals Annual Effective Dose from Natural Background Radiation in Pokhara, Nepal

2020 ◽  
pp. 36-42
Author(s):  
S. P. Gautam ◽  
A. Silwal ◽  
S. Acharya ◽  
B. Aryal
Keyword(s):  
Effective Dose ◽  
Dose Rate ◽  
Background Radiation ◽  
Annual Effective Dose ◽  
Radiological Protection ◽  
Natural Background ◽  
Radiation Dose Rate ◽  
Natural Background Radiation ◽  
Effective Dose Rate ◽  
Annual Effective Dose Rate

Measurement of outdoor natural background radiation doses at different locations of Pokhara city, Nepal was carried out using GCA-07W, Nuclear Regulatory Commission (NRC) certified Geiger Muller (GM) detector. From the measurements, the least value of background radiation dose rate was found to be 0.26 ± 0.08 μSv/hr for Mahendra Cave area, and the highest value of dose rate was found to be 0.65 ± 0.12 μSv/hr for Prithvi Narayan Campus. The average annual effective dose rate of Pokhara city was found to be 0.56 ± 0.12 mSv/yr ranging from 0.31 ± 0.09 mSv/yr to 0.80 ± 0.14 mSv/yr. The radiation levels in Pokhara, the most populated city of the western development region of Nepal, were found to be within the secure limit for areas of the normal background recommended by the International Commission on Radiological Protection (ICRP) (1 mSv/yr). Further, the current result was compared with the previous study of annual effective dose rate measured in Kathmandu city. Comparable value of the average annual effective dose rate in Pokhara and Kathmandu was obtained.

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