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In this paper, an axially symmetrical biological tissue domain subjected to an external heat source is analyzed. The thermal processes occurring in the domain considered are described using the generalized dual-phase lag model supplemented by the Neumann boundary conditions and the appropriate initial conditions. The problem of tissue heating is solved using the implicit scheme of the finite difference...
In this work, a two-dimensional model was developed to analyze the transient temperature distribution in the head of a newborn human, during local cooling promoted by the flow of cold water through a cap. The inverse problem dealt with the sequential estimation of the internal temperature of the head, by performing non-invasive transient temperature measurements. A state estimation problem was solved...
This paper presents preliminary research aimed at recognizing some selected operating parameters of a thermoelectric device. The inverse problem was formulated, for the solution of which a population heuristics (Ant Colony Optimization) was used. In the inverse task, selected parameters important for the cell operation were reconstructed based on relatively easy to obtain temperature measurements...
The paper presents a methodology for the optimal design of multilayer thermal protection based on high-porosity open-cell foam, taking into account the foam morphology. The vector of design parameters includes the thicknesses of layers, porosity and cell diameter of open-cell foam and should ensure required operation temperature on the boundaries of layers and a minimum of the total mass of the system...
The correct orientation of the spacecraft during a space flight is one of the main tasks of astronautics,because its orientation affects the correct operation of all subsystems, in particular power supply systems,where the orientation of solar panels is one of the key tasks. From this point of view, the tasks of developingbackup or replacement of orientation systems are becoming relevant. In this...
The aim of this paper is to compare the performance of four deep convolutional neural networks in theproblem of image-based automated detection of concrete surface cracks in the case of a small dataset. Thiscrack detection problem is treated as a binary classification problem, and it is solved by training a deepconvolutional neural network on the small dataset. In this context, overfitting during...
The method presented in this paper allows the visualization of spatial relations that could not be obtainedusing existing methods. Depending on the component maps that represent the analysis criteria, it ispossible to indicate certain ways to develop good or bad areas. These maps may contain visibility dataas well as other types of spatial impact. Thanks to this, spatial decision criteria can be broad...
In this work, a three-dimensional simplified computational model was built to simulate the passive thermo-physiological response of part of a newborn’s head for neonate’s selective brain cooling. Both metabolicheat generation and blood perfusion were considered. The set of model parameters was selected anda sensitivity study was carried out. Analysis of dimensionless sensitivity coefficients showed...
In this paper, we compare techniques for 3D reconstruction from images. We focus on the pre-processingstep of reconstruction: improving the input images. Several image processing algorithms are selected andtested.The main goal is to improve the quality of the resulting 3D reconstruction. We use two approaches toanalyze the 3D model fitting: comparing them to the orthophotomap and measuring the position...
This paper presents results of experimental tests and numerical analysis of reinforced concrete (RC)beams containing an additional carbon fibre rope strengthening. Two single-span RC beam specimenswith classical reinforcing bars and stirrups and one carbon fibre rope as near-surface mounted (NSM)strengthening were tested in a four-point bending test. The paper presents and compares the resultsregistered...
A proper description of large deformation of continuum or shell requires dealing with curved spacesand application of tensor analysis and distinguishing of covariant and contravariant bases. Thanks tosymbolic computations and visualization capabilities of theMathematicasystem, this task can be carriedout in a straightforward manner. This has been already discussed in [9] and [10]. This paper is a...
Nowadays, people are more interested in their health by maintaining a proper diet. Today’s lifestylecauses obesity and malnutrition in humans because of an uncontrolled diet. This paper proposes thehealth monitoring system using the body mass index (BMI) calorie calculator, which guides people totake proper calories from their daily diet. The image processing steps segmentation, features extraction,and...
This paper presents a new algorithm with an objective of analyzing the similarity measure between two text documents. Specifically, the main idea of the implemented method is based on the structure of the so-called “edit distance matrix” (similarity matrix). Elements of this matrix are filled with a formula based on Levenshtein distances between sequences of sentences. The Levenshtein distance algorithm...
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