Automatyka
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ISSN 1429-3447
e-ISSN: 2353-0952
Issue Date
2006
Volume
T. 10
Number
Nr 2
Description
Journal Volume
Automatyka
T. 10 (2006)
Projects
Pages
Articles
State estimation in linear multi-output systems - design example and discussion of optimality
(Wydawnictwa AGH, 2006) Baranowski, Jerzy
Problem of full rank observer design for multi output systems is considered. Joining of pole placement and optimization of chosen performance index are proposed. Two performance indexes (16) and (25) are presented along with reasoning for their application. Results are illustrated on the example of RC ladder network along with simulational results.
Automatyczne wykrywanie konturu wątroby w obrazach tomograficzno-komputerowych
(Wydawnictwa AGH, 2006) Ciecholewski, Marcin; Dębski, Krzysztof
Computed Tomography (CT) has been widely used for liver disease diagnosis. CT scans can bring precise inspection and shape extraction during examination. Computer-assisted methods to help extract organs and classify diseases from medical seans has received considerable interests over the past years. As a first step of gathering necessary data we need to isolate or segment the liver boundary within CT liver image. In the paper a fully automated method to detect a liver contour has been presented. We propose an author's algorithm based on piece-wise linear interpolation which extracts liver boundary. The paper provides necessary background of radiological anatomy and imaging of the liver.
Segmentacja wątroby w obrazach TK z wykorzystaniem modelu przybliżonego konturu
(Wydawnictwa AGH, 2006) Ciecholewski, Marcin; Dębski, Krzysztof
The segmentation of the liver structure from a computed tomography (CT) image is an important function of the software designed to assist liver diagnostics, because it allows for the elimination of excess information from the diagnostic process. This paper presents an original method of the automatic segmentation of the liver structure of both healthy organs and those with such specific disorders as hemangiomas and hepatomas. In this paper, the task of segmentation has been implemented through first finding the contour of the liver which is made up of a finite number of joint polylines approximating individual fragments of the liver in the CT image. The initial reference point for the calculations is the lumbar section of the spine which is a central point of any CT image of the liver. Next, the field outside the contour is divided into two polygons and eliminated from the image.
The resultants and discriminants of real polynomials and quasipolynomials
(Wydawnictwa AGH, 2006) Górecki, Henryk
The paper presents the connections between resultants of the algebraic and transcendental polynomials. The resultants give information about the problems of stability and the maximal errors in linear stationary dynamic systems.
Realizacja predyktora Smitha na platformie sprzętowo-programowej »soft PLC« bazującej na komputerze klasy PC
(Wydawnictwa AGH, 2006) Oprzędkiewicz, Krzysztof
In the paper problems of practical implementation a special control algorithm »Smith's predictor« were presented. The control system was implemented onto PC - based »soft PLC« platform. A basis version of »soft PLC« system (without real-time kernel) was used. In the paper the hardware and software platform to the task realization were shown, results of experimental tests of real-time requirement during considered control algorithm are also presented. The main conclusion from the paper is that the tested »soft PLC« system implemented with basic version of software assures keeping the longest cycle time of a controller fully responsible for a wide class of industrial control tasks.