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Wyszukujesz frazę "object model" wg kryterium: Temat


Wyświetlanie 1-6 z 6
Tytuł:
A Neural Network Model for Object Mask Detection in Medical Images
Autorzy:
Tereikovskyi, Igor
Korchenko, Oleksander
Bushuyev, Sergey
Tereikovskyi, Oleh
Ziubina, Ruslan
Veselska, Olga
Powiązania:
https://bibliotekanauki.pl/articles/2200721.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
model
neural network
object mask
medical images
Opis:
In modern conditions in the field of medicine, raster image analysis systems are becoming more widespread, which allow automating the process of establishing a diagnosis based on the results of instrumental monitoring of a patient. One of the most important stages of such an analysis is the detection of the mask of the object to be recognized on the image. It is shown that under the conditions of a multivariate and multifactorial task of analyzing medical images, the most promising are neural network tools for extracting masks. It has also been determined that the known detection tools are highly specialized and not sufficiently adapted to the variability of the conditions of use, which necessitates the construction of an effective neural network model adapted to the definition of a mask on medical images. An approach is proposed to determine the most effective type of neural network model, which provides for expert evaluation of the effectiveness of acceptable types of models and conducting computer experiments to make a final decision. It is shown that to evaluate the effectiveness of a neural network model, it is possible to use the Intersection over Union and Dice Loss metrics. The proposed solutions were verified by isolating the brachial plexus of nerve fibers on grayscale images presented in the public Ultrasound Nerve Segmentation database. The expediency of using neural network models U-Net, YOLOv4 and PSPNet was determined by expert evaluation, and with the help of computer experiments, it was proved that U-Net is the most effective in terms of Intersection over Union and Dice Loss, which provides a detection accuracy of about 0.89. Also, the analysis of the results of the experiments showed the need to improve the mathematical apparatus, which is used to calculate the mask detection indicators.
Źródło:
International Journal of Electronics and Telecommunications; 2023, 69, 1; 41--46
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Peculiarities of technical object’s safety level evaluation
Autorzy:
Korostil, J.
Powiązania:
https://bibliotekanauki.pl/articles/360587.pdf
Data publikacji:
2014
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
risk
safety
model
environment
malfunction
technical object
Opis:
In this work is developed method of evaluation safety level, which decreases with floating intensity functioning during technical object. Factors, condition such changes were reviewed. Basing on proposed methodic of detection of various types of risks exists possibility to form constructive algorithms of evaluation of safety level, which allows forming adequate danger counteraction means. One of basic factors, representing dangers, is malfunctions, appearing on technical object.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2014, 40 (112); 100-104
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Features of protection of technical objects against negative exposure
Autorzy:
Korostil, J.
Powiązania:
https://bibliotekanauki.pl/articles/114248.pdf
Data publikacji:
2016
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
attack
prognosis
security system
model
technical object
tools
Opis:
This paper presents research of different classes of attacks against complex technical objects. Attacks are differentiated into different classes on the basis of analysis of attack features which reflect the possible methods of attack interaction with the security system. The developed methods of formal description of attacks and defense methods on the level of their logical approximation allow describing tasks of withstanding attacks for defense tools with enough certainty. Thanks to the proposed interpretation of attack interaction with a defense object and defense tools, it has become possible to determine approaches to the extension of the defense system by adding new tools oriented towards withstanding new attacks.
Źródło:
Measurement Automation Monitoring; 2016, 62, 7; 234-237
2450-2855
Pojawia się w:
Measurement Automation Monitoring
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Semi-Markovian models of the process of technical state changes of technical objects
Autorzy:
Girtler, J.
Powiązania:
https://bibliotekanauki.pl/articles/259191.pdf
Data publikacji:
2004
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
model
technical object
semi-Marcovian process
technical state
Opis:
The most important problem of operation of all technical objects (devices) is the problem of rational (optimum) decision control of the process of technical state changes of the objects. Such control can be realized when a model of the process of technical stale chanŹges is applied. In view of this, a formal description of the operational process of technical objects was presented in this paper, as well as it was justified that the model of the process may be a semi-Markovian process of finite set of states. Examples of 4-and 3-state semiŹ-Markovian process were given as a model of the above mentioned process of state chanŹges of any device. Difficulties associated with forming such model, which arise from application of the theory of semi-Markovian processes, were indicated. Therefore the proposed model is the semi-Markovian process whose values are technical states occurring in the phase of operation of many technical objects of practical importance (e.g. combustion piston engines, turbines, displacement and rotary compressors, impeller pumps etc).
Źródło:
Polish Maritime Research; 2004, 4; 3-7
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Probabilistic concept of defining the situations possible to occur during operation of floating docks
Autorzy:
Girtler, J.
Powiązania:
https://bibliotekanauki.pl/articles/260295.pdf
Data publikacji:
2005
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
floating dock
safety
model
reliability
technical object
semi-Markov process
technical state
Opis:
In this paper possibility to assess safety of floating docks as a result of application of the theory of semi-Markov processes both in the phase of their designing and operating, is outlined. Formal description of the situations which may occur during service of floating docks both those intended for building and repairing the ships, was presented. The following situations were distinguished : normal, complicated, hazardous, emergency and disastrous. A model of changing the distinguished situations was proposed in the form of a semi - Markov process with discrete set of states, and continuous with time. The mentioned situations are values of the process. An operational safety measure for dock was formulated in the form of the probability of the event consisting in occurrence of normal or complicated situation. It was proved that assessment of probability of occurrence of particular situations is possible.
Źródło:
Polish Maritime Research; 2005, S 1; 34-38
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
From UML object behavior description into petri net models towards systematic development of embedded systems
Autorzy:
Szmuc, W.
Szmuc, T.
Powiązania:
https://bibliotekanauki.pl/articles/398100.pdf
Data publikacji:
2016
Wydawca:
Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki
Tematy:
UML
state machine
event
queue
object
Petri
formal
model
maszyna stanów
zdarzenie
kolejka
obiekt
Opis:
The paper describes a translation of object behavior specified by UML into semantically equivalent Petri net models. The translation focuses on object behavior with event handling implemented in UML. The resulted Petri net allows to check UML model properties not only by simulation but also in formal way. For possibly closest congruence between UML and Petri net model an event queue is defined. Each state machine assigned to an object has its own event queue which is available as long as the machine exists. It allows modeling not just a simple message passing but also cases, when state machine cannot handle an event. A higher priority of sub-machine's event queue is also considered. The presented solution is a part of wider conversion algorithm from UML model into Petri nets [12]. However, the paper is intended to describe the issue in such a detailed way and focuses on aspects crucial for embedded systems development.
Źródło:
International Journal of Microelectronics and Computer Science; 2016, 7, 2; 60-64
2080-8755
2353-9607
Pojawia się w:
International Journal of Microelectronics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-6 z 6

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