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57Fe Mössbauer spectroscopy, X-ray diffraction and local (WDX, EDX) and bulk chemical methods (ICP-AES complemented with Fe2 + titration) were used to study glauconites originating from three sandstone samples (NY1, NY3 and EWT) of the Upper Oligocene Eger Formation (Northern Hungary). The, during glauconitisation, increasing aggregate density and magnetic susceptibility offered a unique...
In this paper a novel fuzzy model-based approach is introduced to define the optimal ranges of the cutting parameters (cutting speed, feed, and depth of cut) for hypereutectic aluminum alloys with a diamond tool. This evaluation structure allows one to taking into account the blurred boundaries between the grades of the input parameters, and the expert knowledge can be built into the system by the...
In this work we present the design aspects of special microfluidic structures applicable to dilute and transport analyte solutions (such as whole blood) to the sensing area of biosensors. Our goal is to design and realise a reliable microfluidic system which is applicable for effective sample transport and can accomplish simple sample preparation functions such as mixing to ensure homogeneous concentration...
In risk evaluation of physiological processes there are a lot of input factors and rules, furthermore there are many interactions between them. Handling these interactions is very problematic, because it is difficult to see through the combined effect the large number of factors even the experts. In this paper a possible theoretical method of this problem's treatment will be presented. The study is...
In this paper a possible simplification of a risk level calculation model's neuro-fuzzy subsystem will be studied. The basic model has a hierarchical multilevel structure and uses fuzzy logic based decision making for some groups of risk factors and neuro-fuzzy subsystem is based on ANFIS model structure for the other. The simplification of neuro-fuzzy subsystem is based on disjunction fuzzy operator...
In this paper a neuro-fuzzy risk calculation model based on the authors' former validated hierarchical multilevel risk calculation model will be introduced. In the basic fuzzy model a fuzzy logic controller was replaced with a neural network subsystem. In this way the membership function later will be tuned depending on the patients' characteristics. The two models were tested using several typical...
This paper describes the procedure to calibrate Instrument Transformer Test Set (ITTS) at power line frequency using digital sampling techniques with two commercial multimeters (Agilent 3458A). A power source generates the nominal values of voltage and phase shift between them. The developed software calculates the RMS values of voltages and their shift phases.
Detection of, and protection from overload and denial of service attacks is a common problem in information system servers. Such situation may be the result of simple overload, such as increased service request rate during peak hours, or a malicious distributed attack originating from many computers. This article describes a solution to this problem, focusing on protection mechanisms against both...
A method to minimize the components of uncertainty of a measurement of the quantities of electric power and energy is presented in this work. The measurement procedure is adopted to disseminate the referred units with smaller uncertainties than those inherited due to traceability of secondary standards
The paper gives an account on a new power measuring system, based on digital sampling, which was developed by the National Institute of Metrology (INMETRO) of Brazil. The goal of the project was to achieve the highest possible accuracy at the presence of considerable harmonic distortions, to guarantee full traceability to national standards and to minimize the costs of obtaining a high quality reference...
We report a new configuration for the Maxwell-Wien bridge, with some simple and innovative solutions used in the construction of the bridge developed recently by Inmetro
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