Statistical approach to definition of the human organism states' vector and dynamics of the states under MRT treatment

1994 ◽  
Author(s):  
Sergey P. Sit'ko
Keyword(s):  
Statistical Approach ◽  
Human Organism ◽  
Definition Of

scholarly journals Estimation of the return period of rockfalls according to the block size

2016 ◽  
Author(s):  
Valerio De Biagi ◽  
Maria Lia Napoli ◽  
Monica Barbero ◽  
Daniele Peila
Keyword(s):  
Return Period ◽  
Statistical Approach ◽  
Historical Data ◽  
Risk Estimation ◽  
Block Size ◽  
Return Time ◽  
Correct Definition ◽  
Protection Devices ◽  
Definition Of ◽  
Rockfall Protection

Abstract. With reference to the rockfall risk estimation and the planning of rockfall protection devices one of the most critical and most discussed problems is the correct definition of the design block taking into account its return period. In this paper, a methodology for the assessment of the design block linked with its return time is proposed and discussed, following a statistical approach. The procedure is based on the survey of the blocks already detached from the slope and accumulated at the foot of the slope and the available historical data.

scholarly journals On the Uncertainty of the Image Velocimetry Method Parameters

Hydrology ◽  
2020 ◽  
Vol 7 (3) ◽  
pp. 65
Author(s):  
Evangelos Rozos ◽  
Panayiotis Dimitriadis ◽  
Katerina Mazi ◽  
Spyridon Lykoudis ◽  
Antonis Koussis
Keyword(s):  
Confidence Intervals ◽  
Statistical Approach ◽  
Random Number Generator ◽  
Surface Flow ◽  
Surface Velocity ◽  
A Value ◽  
Image Velocimetry ◽  
Interrogation Area ◽  
Definition Of ◽  
Parameter Values

Image velocimetry is a popular remote sensing method mainly because of the very modest cost of the necessary equipment. However, image velocimetry methods employ parameters that require high expertise to select appropriate values in order to obtain accurate surface flow velocity estimations. This introduces considerations regarding the subjectivity introduced in the definition of the parameter values and its impact on the estimated surface velocity. Alternatively, a statistical approach can be employed instead of directly selecting a value for each image velocimetry parameter. First, probability distribution should be defined for each model parameter, and then Monte Carlo simulations should be employed. In this paper, we demonstrate how this statistical approach can be used to simultaneously produce the confidence intervals of the estimated surface velocity, reduce the uncertainty of some parameters (more specifically, the size of the interrogation area), and reduce the subjectivity. Since image velocimetry algorithms are CPU-intensive, an alternative random number generator that allows obtaining the confidence intervals with a limited number of iterations is suggested. The case study indicated that if the statistical approach is applied diligently, one can achieve the previously mentioned threefold objective.

scholarly journals THE ANALYSIS FORMULATION OF THE LOWEST ASTRONOMICAL TIDE (LAT) BASED ON THE TIME OBSERVATION (THE CASE STUDY OF BENOA WATERS)

JOURNAL ASRO ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 77
Author(s):  
Okol Sri Suharyo ◽  
Johar Setiadi ◽  
Nawanto Budi Sukoco ◽  
Kuncoro Kuncoro
Keyword(s):  
Water Surface ◽  
Statistical Approach ◽  
High Water ◽  
Astronomical Tide ◽  
Time Observation ◽  
Using Data ◽  
One Year ◽  
Definition Of

According to the definition of International Hydrographic Organization (IHO) M-13 2005, the LowestAstronomical Tide (LAT) is Internationally used as chart datum, which is used as instruction for measuring thevalidation of high water surface in the Hydro-oceanography survey. It is predicted by tide prediction for 18.61years. This research is observed minimized in one year. In determining of LAT, it will be analyzed by the tideConstanta and prediction analysis.The analysis of tide Constanta will be calculated by the Rayleigh numberingmethod (the smallest quadrat), start on tide data observation for one month, two months, three months, fourmonths, six months until twelve months data of tide observation. Afterward, from that analysis results of t ideConstanta, it can be predicted the tide for 18.61 years. From this result, the prediction will be found thedifference of the LAT value of tide data less than in one year with tide data in one year. Then, from thedifference of LAT values can be analyzed at a significant level by using the statistical approach. From the resultof the LAT calculation by using data observation of tide in one year will be got the LAT position that is 43.3 cm.If comparing with LAT value which uses a variety of data less than in one year, it will result in the level ofsignificant differences. In this case, LAT value thas is calculated by data less than in one year cannot beequated with LAT which is used by observation of tide data in one year.Keywords: LAT, Tide Component, and interval of tide observation.

scholarly journals Genetic status of patients with colorectal cancer

2021 ◽  
Vol 67 (3) ◽  
pp. 332-337
Author(s):  
Evgeny Kulikov ◽  
Sergey Mertsalov ◽  
Vladimir Grigorenko
Keyword(s):  
Colorectal Cancer ◽  
Genetic Markers ◽  
Diagnostic Methods ◽  
Modern Concept ◽  
Human Organism ◽  
Protective Effects ◽  
Nucleotide Polymorphisms ◽  
Social Significance ◽  
Definition Of ◽  
Work Done

Colorectal cancer remains one of the most common tumors. In the structure of cancer mortality in Russia, tumors of this localization occupy the second place among persons of both sexes, giving way to the cancer of the trachea and bronchi in men, and breast cancer in women, respectively. Despite modern diagnostic methods and approaches to treatment, the problem of colorectal cancer remains acute due to increasing morbidity throughout the world, and recently there has been a downward trend in the average age of patients, which increases the social significance of the problem.  According to the modern concept of carcinogenesis, assessment of the influence of genetic factors on the development of tumors of this localization looks very promising. Research aimed at finding a connection between genetic markers, single-nucleotide polymorphisms of genes and their contribution to the problem of colorectal cancer is one of the most studied directions in modern oncology. In this review, the work done related to the role of gene polymorphisms in the development and therapy of colorectal cancer was evaluated. The works were searched for in the databases of PubMed and Cyber Leninka. The known data about some genes participating in different processes of human organism are given. The data on sensitization and protective effects of polymorphisms of genes, the effect of polymorphisms on the result of treatment of colorectal cancer are presented. The necessity of further work in this direction in order to search for genetic markers and the possibility of implementing the definition of gene polymorphism in clinical practice for personalization of treatment of patients with colorectal cancer are discussed.  

scholarly journals Géomatique appliquée à la géomorphologie littorale : Contribution à la connaissance théorique des techniques d’analyse spatiale de l’évolution du linéaire côtier

2021 ◽  
Vol 17 (28) ◽  
pp. 101
Author(s):  
Mamadou Thior
Keyword(s):  
Remote Sensing ◽  
Statistical Approach ◽  
Digital Processing ◽  
Remote Sensing And Gis ◽  
Aerial Images ◽  
Coastline Evolution ◽  
Système D’Information ◽  
The Subject ◽  
Methodological Approaches ◽  
Definition Of

L’analyse de l’évolution du trait de côte en cinématique du littoral exige tout d’abord le choix d’un indicateur linéaire. En effet, il existe plus d’une douzaine de lignes de référence matérialisant la position du trait de côte. Cette diversité d’indicateurs induit la recherche et la mise au point de nombreuses méthodes pour détecter, extraire et suivre la mobilité du trait de côte. Ces approches méthodologiques reposent sur la compilation et la comparaison de données acquises, soit sur le terrain par des instruments de topométrie (niveau de chantier, théodolite, tachéomètre électronique, lidar, récepteur DGPS, etc.), soit en laboratoire par le traitement numérique d’images satellites ou aériennes. Le but de ce travail est de contribuer à une meilleure connaissance de l’approche cartographique et statistique qui permet de calculer les taux de variation historique du trait de côte à travers les outils la géomatique: Télédétéction et Système d’Information Géographique (SIG). La technique faisant l’objet d’étude dans cette approche est une méthode statistique d’extrapolation et de calcul de tendances basée sur le traitement des images géospatiales. Dans un cadre théorique, le sujet discute la définition de la ligne de référence, du protocole méthodologique de son extraction et de la cartographie de l’évolution du trait de côte du littoral.   The analysis of coastline evolution in coastal kinematics requires first of all the choice of a linear indicator. Indeed, there are more than a dozen reference lines materializing the position of the coastline. This diversity of indicators leads to the research and development of numerous methods to detect, extract and monitor coastline mobility. These methodological approaches are based on the compilation and comparison of data acquired either in the field by topometry instruments (site level, theodolite, electronic tacheometer, lidar, DGPS receiver, etc.) or in the laboratory by digital processing of satellite or aerial images. The aim of this work is to contribute to a better knowledge of the cartographic and statistical approach that allows the calculation of historical coastline variation rates through geomatics tools: Remote sensing and GIS. The technique studied in this approach is a statistical method of extrapolation and calculation of trends based on the processing of geospatial images. In a theoretical framework, the subject discusses the definition of the reference line, the methodological protocol of its extraction and the mapping of the coastline evolution.

Estimation of natural background level of Cr(VI) in ultramafic rock related alluvial aquifers of central Greece: Comparison of results by statistical and deterministic preselection method approaches

2020 ◽  
Author(s):  
Ariadne Argyraki ◽  
Konstantina Pyrgaki ◽  
Efstratios Kelepertzis ◽  
Fotini Botsou ◽  
Ifigeneia Megremi
Keyword(s):  
Statistical Approach ◽  
Ultramafic Rock ◽  
Anthropogenic Activities ◽  
Background Level ◽  
Anthropogenic Factors ◽  
Background Concentration ◽  
Natural Background ◽  
Central Greece ◽  
Alluvial Groundwater ◽  
Definition Of

<p>The definition of natural background concentration levels (NBLs) of geogenic trace metals in groundwater is a challenging issue, particularly in areas where anthropogenic activities are also present. The estimation of NBLs, in combination with environmental quality standards, in such areas is particularly important for the establishment of relevant groundwater threshold values. Over 100 groundwater samples were collected and analysed from four Cr(VI) impacted, alluvial groundwater bodies of central Greece during two consecutive hydrologic years. A common feature of the examined aquifers is the presence of weathered ultramafic rock material in the alluvial sediments. Most sampled boreholes (79 %) are used for irrigation, whereas 21 % of them are used for domestic drinking water supply. Hexavalent Cr concentrations in groundwater, ranging from below detection limit to 430 μg/L, have been attributed to both geogenic and anthropogenic factors. The scope of the present study is to estimate the NBL of Cr(VI) by using a classical statistical approach and a deterministic preselection method and test the comparability of results. In the statistical approach the distribution of samples versus Cr(VI) concentrations has been explored by using probability plots. In this way, the concentration variations within the examined groundwater bodies can be studied and the presence of sub-populations becomes evident by breaks in the slope. In the instance of the preselection method, the concentrations of a set of additional analyzed parameters in ground water, including major water ions and nitrate as well as dissolved oxygen, have been taken into account in order to categorize the samples into two groups of low and high anthropogenic influence, respectively. The comparability of the results derived by the two approaches are discussed in the context of EU Water Framework Directive.</p>

scholarly journals Statistical Estimation of the Dynamics of Watershed Dams

2009 ◽  
Vol 19 (2) ◽  
pp. 349-360
Author(s):  
Zbisław Tabor
Keyword(s):  
Mathematical Morphology ◽  
Extreme Value Theory ◽  
Statistical Estimation ◽  
Statistical Approach ◽  
Statistical Error ◽  
Value Theory ◽  
Direct Measure ◽  
Contour Dynamics ◽  
Statistical Dynamics ◽  
Definition Of

Statistical Estimation of the Dynamics of Watershed DamsIn the present study the notion of watershed contour dynamics, defined within the framework of mathematical morphology, is examined. It is shown that the dynamics are a direct measure of the "sharpness" of transition between neighboring watershed basins. The expressions for the expected value and the statistical error of the estimation of contour dynamics are derived in the presence of noise, based on extreme value theory. The sensitivity of contour dynamics to noise is studied. A statistical approach to the notion of contour dynamics is developed and a definition of statistical dynamics is proposed.

scholarly journals Definition of Probability That Energy Production Differs from Demand, a Statistical Approach

2021 ◽  
Vol 65 (2-4) ◽  
pp. 236-241
Author(s):  
Federico Rossi ◽  
Alberto Maria Gambelli ◽  
Andrea Presciutti
Keyword(s):  
Energy Demand ◽  
Energy Production ◽  
Statistical Approach ◽  
A Priori ◽  
Electricity Grid ◽  
True Value ◽  
Opposite Trend ◽  
Accumulation System ◽  
The Difference ◽  
Definition Of

Starting from the average trend of energy demand and energy production related to a specific user, the goal is to produce an immediate estimate, as close as possible to the true value (clearly achievable only through a precise and punctual measurement), of the difference existing between these two values, in order to “a priori” understand whether an energy production surplus should be expected, or the opposite trend will occur. If energy produced exceeds the request, two solutions will be possible. An accumulation system can be provided, that allows to avoid taking energy from the grid whenever the trend reserves and the demand exceeds the production. The second solution consists in directly introduce the whole surplus of energy produced in the electricity grid. Similarly, even if the energy required exceeds the amount of energy produced, two different solutions can be envisaged. In both cases, it will be necessary to take energy from the electricity grid. An accumulation system could be created, sized on the maximum difference between production and energy demand, evaluated when the production exceeds the request (if the production never exceeds the request, it would not make sense to talk about accumulation) or, even in this case, a direct exchange might be promoted, both incoming and outgoing, with the electricity grid. Topic of the present paper is to not reasoning any more in terms of energy performances as a function of time but, on the contrary, determine the probability that the difference existing between production and demand assumes a certain value and, based on this, estimate the amount of energy to be stored and/or exchange with the grid.

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