Analysis of multiaxial stress states by diffraction methods
Ganev Nikolaj; Pala Zdenek; Lukáš Petr
2013 - English Available at various departments of the ČVUT. Analysis of multiaxial stress states by diffraction methods

Ganev Nikolaj; Pala Zdenek; Lukáš Petr
České vysoké učení technické v Praze, 2013

Optical systems with diffractive elements
Fiala Pavel; Hopp Jaroslav; Jaroszewicz Zbignew
2013 - English Available at various departments of the ČVUT. Optical systems with diffractive elements

Fiala Pavel; Hopp Jaroslav; Jaroszewicz Zbignew
České vysoké učení technické v Praze, 2013

Texture Editing
Haindl Michal; Hatka Martin; Havran Vlastimil
2013 - English Available at various departments of the ČVUT. Texture Editing

Haindl Michal; Hatka Martin; Havran Vlastimil
České vysoké učení technické v Praze, 2013

Clinical dosimetry using polymer gels, application of magnetic resonance imaging
Novotný Josef; Končeková Jitka; Makovička Libor
2013 - English Available at various departments of the ČVUT. Clinical dosimetry using polymer gels, application of magnetic resonance imaging

Novotný Josef; Končeková Jitka; Makovička Libor
České vysoké učení technické v Praze, 2013

USING FUZZY INTEGRAL AS AN AGGREGATION OPERATOR IN DYNAMIC CLASSIFIER SYSTEMS
Holeňa Martin; Štefka David; Berka Petr
2013 - English Using Fuzzy Integral in Dynamic Classifier SystemsUsing Fuzzy Integral in Dynamic Classifier Systems Keywords: classifier combining; dynamic classifier systems; fuzzy integral,fuzzy measure Available at various departments of the ČVUT. USING FUZZY INTEGRAL AS AN AGGREGATION OPERATOR IN DYNAMIC CLASSIFIER SYSTEMS

Using Fuzzy Integral in Dynamic Classifier SystemsUsing Fuzzy Integral in Dynamic Classifier Systems

Holeňa Martin; Štefka David; Berka Petr
České vysoké učení technické v Praze, 2013

Optical guiding of ultra short laser pulses in capillary discharge
Vrbová Miroslava; Tamáš Martin; Kálal Milan
2013 - English Available at various departments of the ČVUT. Optical guiding of ultra short laser pulses in capillary discharge

Vrbová Miroslava; Tamáš Martin; Kálal Milan
České vysoké učení technické v Praze, 2013

Flexural behavior of FRP reinforced concrete beam
Konvalinka Petr; Zatloukal Jan; Kuklík Pavel
2013 - English The flexural behavior of FRP reinforced concrete beam has been the topic of previous research, because of the spread of use of modern FRP composite materials as concrete reinforcement in technical practice. The behavior of FRP reinforced member is vastly different from the one reinforced with steel, mainly because of vast difference between moduli of elasticity of FRP composite and steel. This difference results in the fact that conventional design methods used for years in the field of reinforced concrete structures using steel reinforcement give very poor results if attempted use with FRP reinforced structures. Results of conventional methods are so poor that use of such methods would be dangerous - they tend to overestimate load carrying capacity and underestimate deformations - both resulting in unsafe predictions. This thesis points to formulating easy to use and comprehensible method of evaluating FRP reinforced concrete structures subjected to bending loading, not requiring specialized software and utilizing 1D finite elements.The flexural behavior of FRP reinforced concrete beam has been the topic of previous research, because of the spread of use of modern FRP composite materials as concrete reinforcement in technical practice. The behavior of FRP reinforced member is vastly different from the one reinforced with steel, mainly because of vast difference between moduli of elasticity of FRP composite and steel. This difference results in the fact that conventional design methods used for years in the field of reinforced concrete structures using steel reinforcement give very poor results if attempted use with FRP reinforced structures. Results of conventional methods are so poor that use of such methods would be dangerous - they tend to overestimate load carrying capacity and underestimate deformations - both resulting in unsafe predictions. This thesis points to formulating easy to use and comprehensible method of evaluating FRP reinforced concrete structures subjected to bending loading, not requiring specialized software and utilizing 1D finite elements. Keywords: FRP; composite reinforcement; flexural behavior; moment capacity reduction based on member curvature; potential energy based evaluation Available at various departments of the ČVUT. Flexural behavior of FRP reinforced concrete beam

The flexural behavior of FRP reinforced concrete beam has been the topic of previous research, because of the spread of use of modern FRP composite materials as concrete reinforcement in technical ...

Konvalinka Petr; Zatloukal Jan; Kuklík Pavel
České vysoké učení technické v Praze, 2013

Determination of Number of Particles in the DIRAC Experiment
Smolík Jan; Doškářová Pavla; Taševský Marek
2013 - English Determination of Number of Particles in the DIRAC ExperimentDetermination of Number of Particles in the DIRAC Experiment Keywords: DIRAC experiment; Heavy Gas Cherenkov counter; pp pairs Available at various departments of the ČVUT. Determination of Number of Particles in the DIRAC Experiment

Determination of Number of Particles in the DIRAC ExperimentDetermination of Number of Particles in the DIRAC Experiment

Smolík Jan; Doškářová Pavla; Taševský Marek
České vysoké učení technické v Praze, 2013

Subsoil influenced by groundwater flow
Kuklík Pavel; Brouček Miroslav
2013 - English Even though the soil mechanics has rapidly evolved within last 80 years of its modern history, due to numerous phenomena which influence soils behaviour and are based on its natural characteristics the room for improvement exists. However, most engineering problems, regarding saturated and even unsaturated soils behaviour, can be resolved with sufficient accuracy using powerful numerical models and methods. Although even models which approximate the reality perfectly have to be supplied with material parameters obtained from either laboratory or in-situ experiment when both classes affect only limited surroundings.This thesis focuses on two important areas of research connected with the presence of liquid phase in the soil. First, there is an internal erosion problem of saturated soils when subjected to groundwater flow. Second, the behaviour of soils in unsaturated state under is part of the research. Here the thesis focuses on suction cancellation followed by additional settlement of foundation structures in fine grained and coarse grained soils. However, the last mentioned class is commonly referred as unaffected by suction cancellation. The area of interest was restricted to "hydro-mechanical" point of view and does not involve any chemical interactions between the phases inside the soil or between the surrounding and solved domain. Predominant part of the thesis concentrates on the experimental analysis and its evaluation followed by recommendations. Stand for full scale experiments with varying groundwater table was designed and constructed allowing for observation of all the phenomena and possibility of estimating the effects in situ due to selected measuring technique, i.e. static plate load test. The results obtained from the full scale experiments proved to be very useful in understanding and evaluating of the processes through which the groundwater influence the behaviour of the subsoil. Some of the results obtained challenge the general assumptions, such as fine particle loss due to groundwater flow or negligibility of the effect of suction for coarse soils. The results were also used to calibrate and confirm the ability of professional codes to approximate the soils behaviour during plate load tests and suction cancellation. The success of the last mentioned simulations was very limited despite the enormous computational time used.Part of the thesis is devoted to search for a simple solution with large variety of use available and understandable in common engineering practice. Here, the elastic layer theory with adopted varying influence zone theory providing for fast analytical solution is employed. The thesis also contains recommendations for flood risk assessment, and several comments on practical issues regarding the infiltration policy for large impermeable areas and the influence of hydraulic structures and channel improvements on adjacent areasEven though the soil mechanics has rapidly evolved within last 80 years of its modern history, due to numerous phenomena which influence soils behaviour and are based on its natural characteristics the room for improvement exists. However, most engineering problems, regarding saturated and even unsaturated soils behaviour, can be resolved with sufficient accuracy using powerful numerical models and methods. Although even models which approximate the reality perfectly have to be supplied with material parameters obtained from either laboratory or in-situ experiment when both classes affect only limited surroundings.This thesis focuses on two important areas of research connected with the presence of liquid phase in the soil. First, there is an internal erosion problem of saturated soils when subjected to groundwater flow. Second, the behaviour of soils in unsaturated state under is part of the research. Here the thesis focuses on suction cancellation followed by additional settlement of foundation structures in fine grained and coarse grained soils. However, the last mentioned class is commonly referred as unaffected by suction cancellation. The area of interest was restricted to "hydro-mechanical" point of view and does not involve any chemical interactions between the phases inside the soil or between the surrounding and solved domain. Predominant part of the thesis concentrates on the experimental analysis and its evaluation followed by recommendations. Stand for full scale experiments with varying groundwater table was designed and constructed allowing for observation of all the phenomena and possibility of estimating the effects in situ due to selected measuring technique, i.e. static plate load test. The results obtained from the full scale experiments proved to be very useful in understanding and evaluating of the processes through which the groundwater influence the behaviour of the subsoil. Some of the results obtained challenge the general assumptions, such as fine particle loss due to groundwater flow or negligibility of the effect of suction for coarse soils. The results were also used to calibrate and confirm the ability of professional codes to approximate the soils behaviour during plate load tests and suction cancellation. The success of the last mentioned simulations was very limited despite the enormous computational time used.Part of the thesis is devoted to search for a simple solution with large variety of use available and understandable in common engineering practice. Here, the elastic layer theory with adopted varying influence zone theory providing for fast analytical solution is employed. The thesis also contains recommendations for flood risk assessment, and several comments on practical issues regarding the infiltration policy for large impermeable areas and the influence of hydraulic structures and channel improvements on adjacent areas Keywords: unsaturated soils; suction cancellation; internal erosion; influence zone; elastic layer; static plate load test; Available at various departments of the ČVUT. Subsoil influenced by groundwater flow

Even though the soil mechanics has rapidly evolved within last 80 years of its modern history, due to numerous phenomena which influence soils behaviour and are based on its natural characteristics ...

Kuklík Pavel; Brouček Miroslav
České vysoké učení technické v Praze, 2013

Structural optimization applying neural networks
Křístek Vladimír; Müller Jacob; Procházka Petr
2013 - English Structures are designed to fulfill requirements established in numerous design codes or standards. After the design and construction phase is completed, only a few - sophisticated or important structures, such as bridges - are monitored. However, these monitoring systems are mostly non permanent and typically measure only one or two parameters, which leads to incomplete or questionable results. The thesis is focused on the development of an "intelligent monitoring system". This is achieved by applying neural network algorithms to analyze several complex parameters. This approach achieves reliable results, because the neural network is capable to detect an unusual condition through a self learning process.Structures are designed to fulfill requirements established in numerous design codes or standards. After the design and construction phase is completed, only a few - sophisticated or important structures, such as bridges - are monitored. However, these monitoring systems are mostly non permanent and typically measure only one or two parameters, which leads to incomplete or questionable results. The thesis is focused on the development of an "intelligent monitoring system". This is achieved by applying neural network algorithms to analyze several complex parameters. This approach achieves reliable results, because the neural network is capable to detect an unusual condition through a self learning process. Keywords: Structural design and engineering; building monitoring; neural networks; ideal cycle; structure durability and liability; adaptive applications Available at various departments of the ČVUT. Structural optimization applying neural networks

Structures are designed to fulfill requirements established in numerous design codes or standards. After the design and construction phase is completed, only a few - sophisticated or important ...

Křístek Vladimír; Müller Jacob; Procházka Petr
České vysoké učení technické v Praze, 2013