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1173
Optimization of Multilayer Perceptron Training Parameters Using Artificial Bee Colony and Genetic Algorithm
Kartci, A.
English
In this paper, the momentum coefficient, learning rate, and the number of hidden neurons where the multilayer perceptron works best, are determined. The network and optimization algorithms are written in MATLAB, which was also successfully used to carry out results. To obtain the results, IRIS, mammographic_mass, and new_thyroid data sets have been used. Obtained results show that the determining effect on the neural learning process of parameters (momentum coefficient, learning rate, number of hidden neurons) are compatible with other approaches available in the literature. Both genetic algorithm (GA) and artificial bee colony (ABC) algorithm were successful on finding the values to get high performance as well as effect on performance of the population number.
Keywords:
Multilayer perceptron; artificial bee colony algorithm; genetic algorithm; training parameters optimization
Available in a digital repository NRGL
Optimization of Multilayer Perceptron Training Parameters Using Artificial Bee Colony and Genetic Algorithm
In this paper, the momentum coefficient, learning rate, and the number of hidden neurons where the multilayer perceptron works best, are determined. The network and optimization algorithms are written ...
Sodium ion batteries and gel electrolytes
Gottwald, T.
English
This work deals with the elecdrode materials and gel electrolytes suitable for sodium-ion batteries (Na-ion batteries). In the field of electrode materials were investigated carbon materials based on CR5995 with added SUPERp or NanoTubes for better conduction end LTO material boath working on the principle of insertion of sodium ion in to the electrode material structure. Another part witch this work deals are gel electrolytes for using in this Na-ion batteries, focused on the preparation and subsequent electrochemical and conductivity characterization of gel polymer electrolytes.
Keywords:
Sodium; Lithium; Batteries; Cell; Gel electrolyte
Available in a digital repository NRGL
Sodium ion batteries and gel electrolytes
This work deals with the elecdrode materials and gel electrolytes suitable for sodium-ion batteries (Na-ion batteries). In the field of electrode materials were investigated carbon materials based on ...
Comparison of Dry and Wet Oxidation Process during Low Pressure Boron Diffusion with BBR3 in Solar Cell Production
Mojrová, B.
English
This paper deals with replacing a dry oxidation with a wet oxidation process during low pressure diffusion using boron tribromide (BBr3) in solar cell production. Because the liquid boron trioxide (B2O3), a product of a chemical reaction during diffusion, condenses apart from wafers on walls of quartz tube, it is essential to clean the tube after diffusion. This could be done by evaporation of water into the tube after unload or, in order to make the production time shorter, by replacing the dry oxidation with wet oxidation process. In this paper a comparison of the wet and dry oxidation is given with regard to the solar cell production.
Keywords:
BBr3; diffusion; solar cell; oxidation
Available in a digital repository NRGL
Comparison of Dry and Wet Oxidation Process during Low Pressure Boron Diffusion with BBR3 in Solar Cell Production
This paper deals with replacing a dry oxidation with a wet oxidation process during low pressure diffusion using boron tribromide (BBr3) in solar cell production. Because the liquid boron trioxide ...
Analysis and Prediction of Reliability of Solder Joints
Novotný, V.
English
This article deals with the sphere of solder joints reliability and narrower focus is using simulation software ANSYS and fatigue models for estimate reliabity of solder joints. The text describes the introduction to the issue of the reliability of soldered connections and important factors with their influences. Then are described some options for prediction of reliability. This includes the issue of fatigue models and design of simulation in simulating software ANSYS. In conclusion, there are described output of simulations and options for calculation by fatigue models.
Keywords:
EEICT; ANSYS; Reliability; Simulation; Solder joints; fatigue models
Available in a digital repository NRGL
Analysis and Prediction of Reliability of Solder Joints
This article deals with the sphere of solder joints reliability and narrower focus is using simulation software ANSYS and fatigue models for estimate reliabity of solder joints. The text describes the ...
Detection of defect on FBGA solder balls using X-ray technology
Řihák, P.
English
The paper deals with the detection of defects using X-ray technology. It is focused on a particular type of X-ray machine, which is used for most of these experiments. X-ray cabinet is commonly used for analyzes of defects, which are formed during soldering process. Paper also includes an introduction of different types of defects. These defects are serious issue and they can cause malfunction of infected components or of the entire device. That is the main reason it is so important to focus on this issue.
Available in a digital repository NRGL
Detection of defect on FBGA solder balls using X-ray technology
The paper deals with the detection of defects using X-ray technology. It is focused on a particular type of X-ray machine, which is used for most of these experiments. X-ray cabinet is commonly used ...
Technological aspects of rework
Řihák, P.
English
The paper deals with the technological aspects of rework. There are introduced some of these aspects as ambient temperature and ambient humidity, handling and storing devices and components, operators work, reflow soldering thermal profile, influence of flux. Technological aspects negatively influence reliability of soldering process, it is important to pay close attention to this phenomenon. They also have negative influence on repair yield.
Available in a digital repository NRGL
Technological aspects of rework
The paper deals with the technological aspects of rework. There are introduced some of these aspects as ambient temperature and ambient humidity, handling and storing devices and components, operators ...
Laboratory testing of the communication based protection relays
Daboul, M.; Wasserbauer, V.
English
The proper operation of control and protection applications in Substation Automation System (SAS) demands very high-speed and reliable communications that has being achieved by using IEC 61850. Moreover, the practical implementation and testing of protection scheme requires a communication system that can be conventional or high-speed peer-to-peer communication. This paper presents the evaluation of the performance advantage of GOOSE (Generic Object Oriented Substation Event) message over its conventional hard-wired counterpart for the same relays protection.
Keywords:
IEC 61850 standard; GOOSE; peer-to-peer communication; functional testing
Available in a digital repository NRGL
Laboratory testing of the communication based protection relays
The proper operation of control and protection applications in Substation Automation System (SAS) demands very high-speed and reliable communications that has being achieved by using IEC 61850. ...
Augmentation Technique For Artificial Phase-Contrast Microscopy Images Generation For The Training Of Deep Learning Algorithms
Mívalt, Filip
English
Phase contrast segmentation is crucial for various biological tasks such us quantitative, comparative or single cell level analysis. The popularity of image segmentation using deep learning strategies has been transferred into the field of microscopy imaging as well. Since the huge amount of training data is usually required, the annotation is time-consuming and lengthy. This paper introduces the method and augmentation techniques for artificial phase-contrast images generation aiming at the training of deep learning algorithms.
Keywords:
deep learning; phase-contrast; cell segmentation; data augmentation; artificial data generation
Available in a digital repository NRGL
Augmentation Technique For Artificial Phase-Contrast Microscopy Images Generation For The Training Of Deep Learning Algorithms
Phase contrast segmentation is crucial for various biological tasks such us quantitative, comparative or single cell level analysis. The popularity of image segmentation using deep learning strategies ...
Location Aware Analytics In The Context Of Mobile Network Performance Optimization
Urbanová, Lucie
English
The goal of this paper is to develop an estimation tool capable of predicting location aware network parameters, based on their previous field measurements and to perform a set of additional measurements to verify the accuracy of the tool. Additionally, the paper evaluates a number of regression methods in terms of their prediction accuracy, complexity and the amount of input data needed to create a prediction map of valid results.
Keywords:
Estimation tool; GPR; IDW; Random Forest; Regression
Available in a digital repository NRGL
Location Aware Analytics In The Context Of Mobile Network Performance Optimization
The goal of this paper is to develop an estimation tool capable of predicting location aware network parameters, based on their previous field measurements and to perform a set of additional ...
Simulation Scenarios For The Analysis Of Mobile Transport Network Behavior
Kolackova, Aneta
English
This paper deals with finding ideal emulation environment for simulating mobile transport network. On top of that, two simulation scenarios were created and configured in chosen emulating programs. Further, this article briefly describes the architecture of a mobile transport network with an emphasis on using network protocols. The individual connections between the devices and their purpose of this network are described here.
Keywords:
Simulation Scenario; GNS3; EVE-NG; ESXi; Mobile Transport Network; Cisco
Available in a digital repository NRGL
Simulation Scenarios For The Analysis Of Mobile Transport Network Behavior
This paper deals with finding ideal emulation environment for simulating mobile transport network. On top of that, two simulation scenarios were created and configured in chosen emulating programs. ...
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