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1173
On Solutions Of A Discrete Equation Of Emden-Fowler Type
Korobko, Evgeniya
anglický
The present paper considers a discrete Emden-Fowler-type equation. It is proved that there exists at least one solution with a prescribed asymptotic behavior for all sufficiently large values of the independent variable. The proof is based on a result proved previously
Klíčová slova:
Discrete equation; asymptotic behavior of solution; Emden-Fowler type equation
Plné texty jsou dostupné v digitálním repozitáři NUŠL
On Solutions Of A Discrete Equation Of Emden-Fowler Type
The present paper considers a discrete Emden-Fowler-type equation. It is proved that there exists at least one solution with a prescribed asymptotic behavior for all sufficiently large values of the ...
Detection Of Intracranial Haemorrhages In Head Ct Data Based On Deep Learning
Nemček, Jakub
anglický
In this paper, we present a method for detection of intracranial haemorrhages in the head CT data using convolutional neural networks. We introduce three 2D image classifiers that perform in three perpendicular anatomical planes and classify the CT slices into healthy or pathological, whereby they provide the information about the position of the haemorrhage in the 3D CT image. The accuracies of the three models are 90.19%, 88.15%, and 80.90% for the axial, sagittal and coronal plane.
Klíčová slova:
Intracranial haemorrhage; CT; classification; detection; convolutional neural network
Plné texty jsou dostupné v digitálním repozitáři NUŠL
Detection Of Intracranial Haemorrhages In Head Ct Data Based On Deep Learning
In this paper, we present a method for detection of intracranial haemorrhages in the head CT data using convolutional neural networks. We introduce three 2D image classifiers that perform in three ...
The Design Of Sample Holder For Xrd Measurements In Inert Atmosphere With Displacement Error Correction
Klvač, Ondřej
anglický
This article describes a designed of a holder for post-mortem XRD measurements of Li-ion, Na-ion and Li-S electrodes, which need to be performed in the inert atmosphere. The first part describes the measurement method and problems arising during the measurements of the samples. Subsequently, the design and construction of a new cell with hermetic insulation and sample displacement error correction possible during the operation of the diffractometer is described. Finally, the inert gas attenuation within the cell is theoretically calculated. The calculation is verified by practical measurements, and alternatives are proposed to improve the signal-to-noise ratio.
Klíčová slova:
XRD; ex-situ; post-mortem; sample displacement; attenuation; SNR
Plné texty jsou dostupné v digitálním repozitáři NUŠL
The Design Of Sample Holder For Xrd Measurements In Inert Atmosphere With Displacement Error Correction
This article describes a designed of a holder for post-mortem XRD measurements of Li-ion, Na-ion and Li-S electrodes, which need to be performed in the inert atmosphere. The first part describes the ...
Universal Power Sequencer For Rf Power Amplifiers
Waldecker, Miroslav
anglický
More often used Galium Nitride (GaN) based Radio-Frequency high power transistors in the various RF PA configurations e.g. Doherty is by their nature easily destroyed, great care must be taken, when powering-up and shutting down this circuits. That means, proper power biasing and sequencing is necessary. The Doherty type RF PA with RF drivers four different gate, drain voltages and time when the individual voltages are turned on or off must be controled. Universal power sequencer and biasing device, which meets this requirements is described in this article.
Klíčová slova:
GaN; RF PA; Biasing; Power Sequencing
Plné texty jsou dostupné v digitálním repozitáři NUŠL
Universal Power Sequencer For Rf Power Amplifiers
More often used Galium Nitride (GaN) based Radio-Frequency high power transistors in the various RF PA configurations e.g. Doherty is by their nature easily destroyed, great care must be taken, when ...
The Crane Manipulator For The 3d Printers
Denys, Khmil
anglický
The aim of this work is to design the architecture of a manipulator that takes the finished product out of the 3D printer. This article deals with the whole concept of the machine, its design in the CAD program Siemens NX12, selection of parts, software development, and real prototype assembling. The manipulator is driven by LinuxCNC ecosystem installed on a single-board computer Beaglebone Black. To control the machine, a client PC application was developed. The manipulator movements are achieved using the tooth rail gearing and closed loop stepper motors Nema23.
Klíčová slova:
Manipulator; 3D Printer; CAD; LinuxCNC; Beaglebone Black
Plné texty jsou dostupné v digitálním repozitáři NUŠL
The Crane Manipulator For The 3d Printers
The aim of this work is to design the architecture of a manipulator that takes the finished product out of the 3D printer. This article deals with the whole concept of the machine, its design in the ...
Prostatic Cells Classification Using Deep Learning
Majerčík, Jakub; Špaček, Michal
anglický
Human prostate cancer PC-3 cell line is widely used in cancer research. Previously, Zinc- Resistant variant was described characteristically by higher dry cellular mass determined by quantitative phase imaging. This work aims to classify these 2 cell types into corresponding categories using machine learning methods. We have achieved 97.5% accuracy with the correct preprocessing using Res-Net network.
Klíčová slova:
cell classification; deep learning; neural network; quantitative phase imaging; microscopy
Plné texty jsou dostupné v digitálním repozitáři NUŠL
Prostatic Cells Classification Using Deep Learning
Human prostate cancer PC-3 cell line is widely used in cancer research. Previously, Zinc- Resistant variant was described characteristically by higher dry cellular mass determined by quantitative ...
History Of Electromobility, Future Battery Trends And Howto Measure Them
Šedina, Martin
anglický
This work deals with the description of the development of electromobility from historyto the present day. Problems associated with the use of silicon in anodes and a measuring system fortesting the volume changes of batteries are also mentioned.
Plné texty jsou dostupné v digitálním repozitáři NUŠL
History Of Electromobility, Future Battery Trends And Howto Measure Them
This work deals with the description of the development of electromobility from historyto the present day. Problems associated with the use of silicon in anodes and a measuring system fortesting the ...
In-Situ Sem Characterization Of Lithium-Ion Battery Created On Mems Chip
Klvač, Ondřej
anglický
The aim of the work is to develop an in-situ method for electrode nanostructure investigationby scanning electron microscopy. In the first part, the preparation of a model battery using FIBSEMsystem is described, which consists of lithium titanate oxide (LTO) and metallic lithium materialcutting by the focused ion beam, transport to the MEMS chip, and contacting by carbon deposition.After that the electrodes were soaked by the electrolyte, the voltage changes were measured ontwo created battery systems. Finally, a current was applied to the cell. However, cycling failed dueto technological problems. Challenges connected with battery preparation are described and possiblesolutions for future testing are proposed. The work is evolved in cooperation with Thermo FisherScientific Brno.
Klíčová slova:
SEM; FIB; MEMS; in-situ; Li-ion; LTO; battery characterization
Plné texty jsou dostupné v digitálním repozitáři NUŠL
In-Situ Sem Characterization Of Lithium-Ion Battery Created On Mems Chip
The aim of the work is to develop an in-situ method for electrode nanostructure investigationby scanning electron microscopy. In the first part, the preparation of a model battery using FIBSEMsystem ...
Issue Of Measuring Parameters Of Dielectric Materials
Pelikán, Luděk
anglický
This article deals with the problems arising in the electrical measurement of various dielectricmaterials used in power engineering. The article presents the basic quantities and theirmeasurement principles. It focuses mainly on parameters measurable in non-destructive measurements,such as volume resistivity, relative permittivity, and dissipation factor. The article draws attentionto the problems that may arise during the measurement and thus guides the reader on howto measure these parameters correctly. These problems and findings were gathered during severaldifferent measurements with different types of dielectrics.
Klíčová slova:
Insulation; Dielectric; DC Resistivity; Polarization; Permittivity; Dissipation Factor,Electronic Bridge
Plné texty jsou dostupné v digitálním repozitáři NUŠL
Issue Of Measuring Parameters Of Dielectric Materials
This article deals with the problems arising in the electrical measurement of various dielectricmaterials used in power engineering. The article presents the basic quantities and theirmeasurement ...
Assessment Of Invesments In Local Distribution System Using Cost-Benefit Analysis
Vrtal, Matěj
anglický
This paper demonstrates the possibility of using cost-benefit analysis to evaluate investmentsin the development of local distribution systems, specifically the modernization of distributiontransformers. The article interprets the results of the analysis of three investment variants of aspecific company operating a local distribution system in the Czech Republic.
Klíčová slova:
LDS; CBA; transformer; investments; assessment
Plné texty jsou dostupné v digitálním repozitáři NUŠL
Assessment Of Invesments In Local Distribution System Using Cost-Benefit Analysis
This paper demonstrates the possibility of using cost-benefit analysis to evaluate investmentsin the development of local distribution systems, specifically the modernization of ...
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