Prohlížení Acta Polytechnica. 2016, vol. 56 dle názvu
Zobrazují se záznamy 19-38 z 61
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DETERMINING THE ROLE OF INDIVIDUAL FLY ASH PARTICLES IN INFLUENCING THE VARIATION IN THE OVERALL PHYSICAL, MORPHOLOGICAL, AND CHEMICAL PROPERTIES OF FLY ASH
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2016)The properties of fly ashes vary because of the differences in the properties of their individual particles, and the determination of variation in these properties is of interest to the industries which use pulverized raw ... -
EFFECT OF FIBRE ASPECT RATIO AND FIBRE VOLUME FRACTION ON THE EFFECTIVE FRACTURE ENERGY OF ULTRA-HIGH-PERFORMANCE FIBRE-REINFORCED CONCRETE
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2016)This paper investigates the effective fracture energy of UHPFRC with various fibre volume fractions and various fibre aspect ratios. We have concluded that the effective fracture energy is dependent on both the fibre volume ... -
ELASTO-KINEMATIC COMPUTATIONAL MODEL OF SUSPENSION WITH FLEXIBLE SUPPORTING ELEMENTS
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2016)This paper analyzes the impact of flexibility of individual supporting elements of independent suspension on its elasto-kinematic characteristics. The toe and camber angle are the geometric parameters of the suspension, ... -
EVALUATION OF THE SURFACE SETTLEMENT ABOVE THE PRAGUE METRO LINE A EXTENSION CONSTRUCTED BY TWO SHIELDS
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2016)The new section of the Prague metro V.A is located in the west part of Prague, between stations Dejvická and Motol Hospital. The new metro section is 6.2km long and has four new stations. Majority of the two running tunnels ... -
EXPERIMENTAL EVALUATION OF WEDM MACHINED SURFACE WAVINESS
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2016)Wire Electrical Discharge Machining (WEDM) an unconventional machining technology which has become indispensable in many industries. The typical morphology of a surface machined using the electrical discharge technology ... -
EXPERIMENTAL INVESTIGATION ON CHROMIUM(VI) REMOVAL FROM AQUEOUS SOLUTION USING ACTIVATED CARBON RESORCINOL FORMALDEHYDE XEROGELS
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2016)The adsorption of chromium(VI) metal ion in aqueous solutions by activated carbon resorcinol formaldehyde xerogels (ACRF) was investigated. The results showed that pore structure, surface area and the adsorbent surface ... -
EXPERIMENTAL LEVELLING AT THE INTERFACE OF OPTICAL ENVIRONMENTS
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2016)The article discusses the problems of refraction and its impact on levelling at the interface of optical environments. It describes the influence of a vertical refraction and shows the results of investigating the effect ... -
EXPERIMENTAL METHOD ON INVESTIGATION OF FIBRE REINFORCED CONCRETE AT ELEVATED TEMPERATURES
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2016)Generally speaking, adding a certain amount of steel fibres to a concrete mixture improves its mechanical properties. Currently, a lack of information considering tensile and post cracking behaviour of FRC at elevated ... -
FINITE ELEMENT MODELLING AND SIMULATION OF VEHICLE IMPACT ON STEEL SAFETY BARRIERS
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2016)This paper deals with a FEA simulation of the vehicle crash with steel safety barriers in ANSYS LS-DYNA® 15.0. Two types of safety barriers are used: JSNH4/H2 and JSAM-2/H2. A geometrical model of the barrier in the Modeler ... -
FORMATION CONTROL OF MULTIPLE UNICYCLE-TYPE ROBOTS USING LIE GROUP
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2016)In this paper the formation control of a multi-robots system is investigated. The proposed control law, based on Lie group theory, is applied to control the formation of a group of unicycle-type robots. The communication ... -
HYBRID REASONING FOR MULTI-ROBOT DRILL PLANNING IN OPEN-PIT MINES
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2016)Fleet automation often involves solving several strongly correlated sub-problems, including task allocation, motion planning, and coordination. Solutions need to account for very specific, domaindependent constraints. In ... -
IMPACT OF PLASTIC DEFORMATION ON THE PROPERTIES OF A SELECTED ALUMINIUM ALLOY
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2016)This paper reports on an experiment to assess the influence of plastic deformation on the microstructure and properties of EN AW 6012 (AlMgSiPb) aluminium alloy in two states. The first was the initial state with heat ... -
INTEGRAL METHODS FOR DESCRIBING PULSATILE FLOW
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2016)This paper presents an approximate solution of the pulsatile flow of a Newtonian fluid in the laminar flow regime in a rigid tube of constant diameter. The model is represented by two ordinary differential equations. The ... -
IS PT-SYMMETRIC QUANTUM THEORY FALSE AS A FUNDAMENTAL THEORY?
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2016)Yi-Chan Lee et al. claim (cf. Phys. Rev. Lett. 112, 130404 (2014)) that the “recent extension of quantum theory to non-Hermitian Hamiltonians” (which is widely known under the nickname of “PT-symmetric quantum theory”) is ... -
ITINERARIES INDUCED BY EXCHANGE OF THREE INTERVALS
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2016)We focus on a generalization of the three gap theorem well known in the framework of exchange of two intervals. For the case of three intervals, our main result provides an analogue of this result implying that there are ... -
LABORATORY TESTING OF THE LEICA AT401 LASER TRACKER
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2016)This paper describes laboratory tests on a Leica AT401laser tracker. As the newer Leica AT402 model also uses the same firmware package, most of the results should also be valid for this device. First, we present the ... -
LAPLACE EQUATIONS, CONFORMAL SUPERINTEGRABILITY AND BÔCHER CONTRACTIONS
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2016)Quantum superintegrable systems are solvable eigenvalue problems. Their solvability is due to symmetry, but the symmetry is often ``hidden''.The symmetry generators of 2nd order superintegrable systems in 2 dimensions close ... -
MAGNETRON SPUTTERING WITH HOT SOLID TARGET: THERMAL PROCESSES AND EROSION
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2016)This work focuses on erosion and thermal processes taking place on the surface of the titanium target in magnetron sputtering. The study was carried out using magnetron sputtering systems (MSS) with different thermal ... -
MEASUREMENTS ON THE VT 400 AIR TURBINE
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2016)This paper presents a basic description of measurements on the experimental air turbine located in the laboratories of the Department of Power System Engineering (KKE). The research on this turbine focuses on the flow in ... -
MODEL OF HEAT SIMULATOR FOR DATA CENTERS
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2016)The aim of this paper is to present a design and a development of a heat simulator, which will be used for a flow research in data centers. The designed heat simulator is based on an ideological basis of four-processor 1U ...