Prohlížení Acta Polytechnica. 2012, vol. 52 dle názvu
Zobrazují se záznamy 38-57 z 100
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Experimental Investigation of Radial Gas Dispersion Coefficients in a Fluidized Bed
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)In a fluidized bed boiler, the combustion efficiency, the NOX formation rate, flue gas desulphurization and fluidized bed heat transfer are all ruled by the gas distribution. In this investigation, the tracer gas method ... -
Explosion Cladding of Lead on Steel
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)This work deals with explosion cladding of lead on steel. The welded materials and the Semtex S type explosive are characterised. The preparation of the welded materials and the proposed welding assembly are described. The ... -
Femoral Test Bed for Impedance Controlled Surgical Instrumentation
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)The risk for patients during the standard procedure of revision of cemented artificial hip joints is unsatisfactorily highdue to its high level of invasiveness and limited access to the operative field. To reduce this risk ... -
Flexible Multi-Electrode Array for Medical Applications
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)A flexible multi-electrode array (MEA) with an embedded silicon chip for electrical stimulation of neurons or for recording action potentials has been manufactured and characterized. Possible improvements for medical ... -
FMEA and FTA Analyses of the Adhesive Joining Process using Electrically Conductive Adhesives
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)This paper introduces a formulation of appropriate risk estimation methods that can be used for improving of processes in the electronics area. Two risk assessment methods have been chosen with regard to the specifics of ... -
Fundamental Research on Hydraulic Systems Driven by Alternating Flow
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)This paper presents a new approach to rotary hydraulic systems, and the functional principles of rotary hydraulic systems that can work using alternating flows. Hydraulic transmissions using alternating flows are based on ... -
Gated Graphene Electrical Transport Characterization
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)Graphene is a very interesting new material, and promises attractive applications in future nanodevices. It is a 2D carbon structure with very interesting physical behavior. Graphene is an almost transparent material that ... -
Geometrical Modeling of Concrete Microstructure for the Assessment of ITZ Percolation
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)Percolation is considered to be a critical factor affecting the transport properties of multiphase materials. In the case of concrete, the transport properties are strongly dependent on the interfacial transition zone ... -
Global Optima for Size Optimization Benchmarks by Branch and Bound Principles
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)This paper searches for global optima for size optimization benchmarks utilizing a method based on branch and bound principles. The goal is to demonstrate the process for finding these global optima on the basis of two ... -
GRB Duration Distribution Considering the Position of the Fermi
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)The Fermi satellite has a particular motion during its flight which enables it to catch the gamma-ray bursts mostly well. The side-effect of this favourable feature is that the lightcurves of the GBM detectors are stressed ... -
Heat Exchangers for Condensation and Evaporation Applications Operating in a Low Pressure Atmosphere
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)This paper presents a state-of-the-art study of a heat transfer process in liquid spraying heat exchangers placed in a vacuum chamber. The experimental case studied here describes the behavior of a falling film evaporation ... -
Hierarchical Modeling of Mastic Asphalt in Layered Road Structures Based on the Mori-Tanaka Method
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)We present an application of the Mori-Tanaka micromechanical model for a description of the highly nonlinear behavior of asphalt mixtures. This method is expected to replace an expensive finite element-based fully-coupled ... -
Holding Pressure and Its Influence on Quality in PIM Technology
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)The PIM (powder injection molding) process consists of several steps in which faults can occur. The quality of the part that is produced usually cannot be seen until the end of the process. It is therefore necessary to ... -
Hygiena 3, a Forgotten Project for Electrolytic Water Treatment
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)In the interwar period, the city of Prague had to resolve the problem of treating the polluted water produced by its citizens. From 1933 - 1936 an ambitious competition was held. The idea behind the competition was to bring ... -
Hygro-Thermo-Mechanical Analysis of a Reactor Vessel
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)Determining the durability of a reactor vessel requires a hygro-thermo-mechanical analysis of the vessel throughout its service life. Damage, prestress losses, distribution of heat and moisture and some other quantities ... -
Idealized Compression Ratio for a Screw Briquetting Press
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)This paper deals with issues in determining the ideal compression ratio for a screw briquetting press. First, the principles of operation and a basic description of the main parts of a screw briquetting press are introduced. ... -
Influence of the Amount of Master Alloy on the Properties of Austenitic Stainless Steel AISI 316L Powder Sintered in Hydrogen
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)AISI 316L austenitic stainless steel powder was modified with four different amounts of boron (0.1; 0.2; 0.3; 0.4 of wt. %) in the form of MasterAlloy micro-powder, and was sintered in a pure dry hydrogen atmosphere in ... -
Influence of the Surface Layer when the CMT Process Is Used for Welding Steel Sheets Treated by Nitrooxidation
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)Nitrooxidation is a non-conventional surface treatment method that can provide significantly improved mechanical properties as well as corrosion resistance. However, the surface layer is a major problem during the welding ... -
Influence of Various Process Parameters on the Density of Sintered Aluminium Alloys
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)This paper presents the results of density measurements carried out on Alumix sintered parts. ECKA Alumix aluminium powders were used because of their wide application in the powder metallurgy industry. The compacts were ... -
Integration of Autonomous UAVs into Multi-agent Simulation
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)In recent years, Unmanned Aerial Vehicles (UAVs) have attracted much attention both in the research field and in the field of commercial deployment. Researchers recently started to study problems and opportunities connected ...