Wyniki 1-4 spośród 4 dla zapytania: authorDesc:"Saule SMAILOVA"

Using a priori data for segmentation anatomical structures of the brain DOI:10.15199/48.2017.05.20

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The paper presents a method for providing a segmentation of the anatomical structures of the brain at the image. The proposed method of segmentation makes the analysis of tomographic slices based on the stage of the provisional classification. Furthermore, for the segmentation of brain CT slices, it is proposed to use as the information about the position and the shape of structures and the X-ray density. Streszczenie. Artykuł prezentuje metodę segmentacji struktur anatomicznych mózgu. Przedstawiona metoda segmentacji wykorzystuje etap wstępnej anlizy przekrojów tomograficznych. Dodatkowo informacji uzyskana na etapie segmentacji obrazów CT mózgu, może być wykorzystana do określania kształtu o położenia struktur mózgowych, jak również określenia wiązki promieniowania X podczas zabiegu operacyjnego (Wykorzystanie danych a priori do segmentacji anatomicznych struktur mózgu). Keywords: brain, computed tomography, image segmentation, a priori information. Słowa kluczowe: mózg, tomografia komputerowa, segmentacja obrazu, informacja a priori Introduction Currently, stereotactic brain surgery relies heavily on computer planning of surgical accesses. These systems, using introscopic research data (such as CT, MRI, etc.) allow us to identify the most optimal (in terms of the least trauma) path of a surgical intervention. Development of computer planning systems is a challenge that includes both hardware and software levels. One of the fundamental parts of a planning system is space of operation on which the calculation is made. This space is the volume of brain, elementary item which contains the value of invasiveness index corresponding to a specific anatomical structure. Building of such a volume according the introscopic data manually is a tedious task. It is therefore necessary to carry out the automatic segmentation of brain CT slices based on a priori information about the disposition of anatomical structures. The solution to this pr[...]

Evaluation of the risk of occupation a diseases caused by electromagnetic field generated by extra-high voltage electric installations DOI:10.15199/48.2017.05.24

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Researched were the regularities in formation of the risk of occupational disease in staff caused by industrial-frequency electromagnetic field in extra-high voltage electric installations for further evaluation. Considered were the main conditions of electrical safety systems (optimum, permissible, harmful, dangerous) and possible transitions between them depending on the magnitude of the electric power, absorbed by employee’s body. Proposed are new levels of working conditions associated with electric power effect under proposed techniques. Set forth are the results of evaluation of occupational disease risk using probit-function and the recommendations regarding the arrangements aimed at reduction thereof. Streszczenie. W pracy badano regularność w występowaniu ryzyka choroby zawodowej pracowników, spowodowane przez pole elektromagnetyczne, o częstotliwości przemysłowej w wysokonapięciowych instalacjach elektrycznych. Rozpatrywane były główne warunki bezpieczeństwa instalacji elektrycznych (optymalne, dopuszczalne, szkodliwe, niebezpieczne) oraz możliwe przejścia między nimi, w zależności od wielkości energii elektrycznej, pochłanianej przez ciało pracownika. Zaproponowano nowe poziomy warunków pracy, związane z oddziaływaniem mocy elektrycznej, związanych z proponowanymi technikami. W pracy podano wyniki oceny wystąpienia ryzyka choroby zawodowej z wykorzystaniem modelu probit oraz zalecenia, dotyczące ustaleń mających na celu ich zmniejszenie. (Ocena ryzyka wystąpienia chorób zawodowych wywołanych przez pola elektromagnetyczne generowane przez instalacje elektryczne najwyższego napięcia). Keywords: electromagnetic field, risk, disease, electric installation, electric power. Słowa kluczowe: pole elektromagnetyczne, ryzyko, choroby, instalacja elektryczna, energia elektryczna. Introduction The Extra-high voltage (EHV) electric installations of industrial frequency 330, 500, 750 kV represent one of the main components of Ukraine[...]

Basic principles of technological object's touch registration during machining materials DOI:10.15199/48.2019.04.19

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The problem of increasing the efficiency of processing processes and improving the quality of products can be solved successfully by the creation and implementation of methods and systems for controlling the quality of production processes. The implementation of such methods is especially important for instrument making, where in many cases the requirements for improving the accuracy of processing are of paramount importance. Analyzing the factors influencing the quality of the final product of mechanical processing [1, 2, 3], it should be noted that this is a set of indicators produced by the consumer market of products, formulated by quality standards.The rather superficial view of these indicators is to see the impact of equipment wear on their variations over time. The fluidity of the machine's parameters is especially felt on the exact parameters of the parts manufactured. Hence, the quality parameter most exposed is the size of individual fragments of the part. The more precisely it is necessary to perform this or that part size, the greater the requirements for the accuracy of the machine. But due to the rapid wear and tear of the machine tool there are possibilities of violation of the above indicators. The main factor affecting this indicator is obvious hysteresis in the movement of the forward and reverse coordinates (duality - clearance). Analyzing the work of modern CNC-machines [4, 5, 6], it is necessary to notice the fact that despite the high precision of the motion of the working surface and the tool, the machine as a forming device is technologically unlocked in its circle. The movement of the working surfaces of the machine tool and the cutting tool can occur even without the presence of a detail on the workdesktop. Such a lack of feedback leaves the technological information system in relation to the accuracy of the size be performed, the wear of the tool, the fidelity of the chosen mode of operation, th[...]

Coordination of serial-parallel manufacturing processes of milk production DOI:10.15199/48.2019.04.31

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The use of spatially distributed technological objects in industry and production systems is an ever-increasing trend. One of the first fundamental overview of distributed processes control systems was in the work of Golemanov [1]. The isolated action of these objects often leads to numerous problems and generates a high degree of uncertainty in making managerial decisions. Objects can have different goals and constraints, various parameters of productivity and efficiency, therefore to achieve a common goal it is necessary to organize their complex interaction [2-4]. The problem of decision making coordination in the control of production systems is particularly relevant. Researchers have dedicated a lot of attention to formulation of coordination control in complex systems and methods of their solutions, as evidenced by the significant number of publications that have appeared in recent decades [5-6]. In this work, we consider mainly iterative and non-iterative coordination algorithms. With the non-iterative algorithm, the result of optimal coordination is achieved through a single information exchange between levels of the control hierarchy. The disadvantage of this method is the high complexity of the calculations. In the iterative algorithm, the optimal solution is associated with multiple exchanges of information between the center and the elements. In this case, the drawback consists in a significant number of iterations and, consequently, a long calculation time. The disadvantage of this method is the high complexity of the calculations. In the iterative algorithm, the optimal solution is associated with multiple exchanges of information between the center and the elements. In this case, the drawback consists in a significant number of iterations and, consequently, a long calculation time. A series of works carried out with the participation of authors [7-9] is devoted to the tasks of model development and coordinat[...]

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