Conceptual project of biomass fired district heating power plant
Zawojak, Sylwia; Żurawska, Monika; Czopek, Przemyslaw; Dziwak, Bartosz; Nowak, Mateusz
2014 - English Keywords: biomasa; dálkové vytápění; projekt; biomass; district heating; project Available in digital repository of ZČU. Conceptual project of biomass fired district heating power plant

Zawojak, Sylwia; Żurawska, Monika; Czopek, Przemyslaw; Dziwak, Bartosz; Nowak, Mateusz
Západočeská univerzita v Plzni, 2014

Using pyrolysis of biomass for production fuels and gases for energetics
Bucko, Samuel; German-Sobek, Martin; Pavlík, Marek; Király, Jozef; Novák, Matúš
2014 - English The Pyrolysis method for biomass processing was presented in this paper. One from lot of methods for comparing kinds and properties of biomass in pyrolysis process was selected thermogravimetric analysis (TGA). The aim of this paper is presenting current research in pyrolysis from agricultural countries. In general, using of biomass can be convenient, primarily in developing countries for fulfillment international emission standards. Keywords: biomasa; pyrolýza; palivo; plyny; biomass; pyrolysis; fuel; gases Available in digital repository of ZČU. Using pyrolysis of biomass for production fuels and gases for energetics

The Pyrolysis method for biomass processing was presented in this paper. One from lot of methods for comparing kinds and properties of biomass in pyrolysis process was selected ...

Bucko, Samuel; German-Sobek, Martin; Pavlík, Marek; Király, Jozef; Novák, Matúš
Západočeská univerzita v Plzni, 2014

The negative effects of biomass combustion and co-combustion in small power boilers
Hardy, Tomasz
2014 - English Keywords: biomasa; malé elektrické kotle; negativní vlivy; biomass; small power boilers; negative effects Available in digital repository of ZČU. The negative effects of biomass combustion and co-combustion in small power boilers

Hardy, Tomasz
Západočeská univerzita v Plzni, 2014

Overview of biomass usage in combined heat and power units
Király, Jozef; Novák, Matúš; Zbojovský, Ján; Lisoň, Lukáš
2014 - English This article deals with overview of biomass usage in combined heat and power units (CHP). The aim of the paper is to explain fundamentals and basic properties of these units and heat and power generation with these units. Article deals also with basic requirements for connecting these blocks into power grid and differences in operation between decentralised CHP units and centralised power plants. In beginning of article the authors devote about basic principles of extraction fuel from biomass and with processing of biomass. Decentralised units are introduced also on examples of onsite solutions of these units. Keywords: biomasa; topení; kombinovaná tepelné a elektrické jednotky; biomass; heating; combined heat and power units Available in digital repository of ZČU. Overview of biomass usage in combined heat and power units

This article deals with overview of biomass usage in combined heat and power units (CHP). The aim of the paper is to explain fundamentals and basic properties of these units and heat and ...

Király, Jozef; Novák, Matúš; Zbojovský, Ján; Lisoň, Lukáš
Západočeská univerzita v Plzni, 2014

Impact of connection point of alternative energy sources to the size of short circuit current in the distribution network
Kmec, Miroslav; Jakubčák, Roman; Lisoň, Lukáš; Čonka, Zsolt; Beňa, Ľubomír
2014 - English Nowadays it is effort to use as much as possible renewable (alternative) sources of electricity based on the sun radiation (biomass, hydro, wind or solar power). These plants are environmentally friendly and do not pollute the environment as much as it was in traditional coal power plants. These sources are at present in a large number were connected to the existing distribution network. Due to the increase of these sources in distribution networks is necessary to examine their impact on the overall operation of the network as in normal operation as well as a fault condition. The aim of this paper is to point out of impact location of connection newly built alternative energy sources, especially biomass power plants (BPP) to the size of short-circuit current during fault in the distribution network. This paper describes possible connection of these sources into power system, short theoretical knowledge for short circuit calculation in distribution network and simulation in program Matlab / Simulink. Keywords: alternativní zdroje energie; zkratový proud; distribuční síť; alternative energy sources; short circuit current; distribution network Available in digital repository of ZČU. Impact of connection point of alternative energy sources to the size of short circuit current in the distribution network

Nowadays it is effort to use as much as possible renewable (alternative) sources of electricity based on the sun radiation (biomass, hydro, wind or solar power). These plants are environmentally ...

Kmec, Miroslav; Jakubčák, Roman; Lisoň, Lukáš; Čonka, Zsolt; Beňa, Ľubomír
Západočeská univerzita v Plzni, 2014

Character Transfer: Example-based individuality retargeting for facial animations
Kato, Takuya; Saito, Shunsuke; Kawai, Masahide; Iwao, Tomoyori; Maejima, Akinobu; Morishima, Shigeo
2014 - English A key disadvantage of blendshape animation is the labor-intensive task of sculpting blendshapes with individual expressions for each character. In this paper, we propose a novel system ”Character Transfer”, that automatically sculpts blendshapes with individual expressions by extracting them from training examples; this extraction creates a mapping that drives the sculpting process. Comparing our approach with the naïve method of transferring facial expressions from other characters, Character Transfer effectively sculpted blendshapes without the need to create such unnecessary blendshapes for other characters. Character Transfer is applicable even the training examples are limited to only a few number by using region segmentations of the face and the blending of the mappings. Keywords: animace obličeje; blandshape animace; segmentace modelu obličeje; výraz obličeje; facial animation; blendshape animation; facial model segmentation; facial expression Available in digital repository of ZČU. Character Transfer: Example-based individuality retargeting for facial animations

A key disadvantage of blendshape animation is the labor-intensive task of sculpting blendshapes with individual expressions for each character. In this paper, we propose a novel system ”Character ...

Kato, Takuya; Saito, Shunsuke; Kawai, Masahide; Iwao, Tomoyori; Maejima, Akinobu; Morishima, Shigeo
Západočeská univerzita v Plzni, 2014

Accurate thickness computation of a B-Rep model on the GPU
Lemasson, Grégoire; Iehl, Jean-Claude; Zara, F.; Baudet, Vincent; Arthaud, Philippe; Shariat, Behzad
2014 - English In this paper, we present a technique that calculates the thickness of a B-Rep model. This calculation is performed directly on trimmed NURBS and not on a triangular approximation. We determine the thickness in parallel on GPU, by computing the radius of maximal spheres contained within the B-Rep model. The results are presented by a color-coded thickness map. A detailed study of our results demonstrates a very important gain in stability, precision and computation time compared to others approaches. Keywords: výpočet tloušťky; parametrické plochy; ořezávání křivek; Newtonovy iterace; grafické procesory; thickness computation; parametric surfaces; trimming curves; Newton iterations; graphic processing units Available in digital repository of ZČU. Accurate thickness computation of a B-Rep model on the GPU

In this paper, we present a technique that calculates the thickness of a B-Rep model. This calculation is performed directly on trimmed NURBS and not on a triangular approximation. We determine the ...

Lemasson, Grégoire; Iehl, Jean-Claude; Zara, F.; Baudet, Vincent; Arthaud, Philippe; Shariat, Behzad
Západočeská univerzita v Plzni, 2014

A Stable and Invariant Three-polar Surface Representation: Application to 3D Face Description
Jribi, Majdi; Ghorbel, Faouzi
2014 - English In this paper, we intend to introduce a new curved surface representation that we qualify by three-polar. It is constructed by the superposition of the three geodesic potentials generated from three reference points of the surface. By considering a pre-selected levels set of this superposition, invariant points are obtained. A comparative study between this representation and the unipolar one based on the level curves around one reference point is established in the sense of the stability under errors on the reference points positions. The three-polar representation is applied, finally, for 3D human faces description. Its accuracy is performed in the mean of the Hausdorff shape distance. Keywords: reprezentace povrchu; 3D popis; obličej; surface representation; 3D description; face Available in digital repository of ZČU. A Stable and Invariant Three-polar Surface Representation: Application to 3D Face Description

In this paper, we intend to introduce a new curved surface representation that we qualify by three-polar. It is constructed by the superposition of the three geodesic potentials generated from three ...

Jribi, Majdi; Ghorbel, Faouzi
Západočeská univerzita v Plzni, 2014

Supervised Force Directed Algorithm for the Generation of Flow Maps
Debiasi, Alberto; Simões, Bruno; De Amicis, Raffaele
2014 - English Cartographic flow maps are graphical representations for portraying the movement of objects, such as people, goods or traffic network, from one location to another. On the one hand, flow maps can reduce visual clutter by merging single representations of movement. On the other hand, flow maps are also fast to produce and simple to understand. In this paper, we present a new method for the automatic generation of flow maps. Our method is based on a theoretically grounded physical system to describe the motion and forces of attraction and repulsion between data points. Additionally, support for an optional supervision of the graph layout is also available. Finally, the cost of our algorithm is evaluated and a comparison with existing implementations is provided. Results have shown a good balance between computational complexity and the visual quality of the generated maps. Keywords: mapy toku; kartografie; geovizualizace; grafická interakce; flow maps; cartography; geovisualization; graphic interaction Available in digital repository of ZČU. Supervised Force Directed Algorithm for the Generation of Flow Maps

Cartographic flow maps are graphical representations for portraying the movement of objects, such as people, goods or traffic network, from one location to another. On the one hand, flow maps can ...

Debiasi, Alberto; Simões, Bruno; De Amicis, Raffaele
Západočeská univerzita v Plzni, 2014

Review and Comparative Study of Ray Traversal Algorithms on a Modern GPU Architecture
dos Santos, Artur Lira; Teichrieb, Veronica; Lindoso, Jorge
2014 - English In this paper we present a chronological review of five distinct data structures commonly found in literature and ray tracing systems: Bounding Volume Hierarchies (BVH), Octrees, Uniform Grids, KD-Trees, and Bounding Interval Hierarchies (BIH). This review is then followed by an extensive comparative study of six different ray traversal algorithms implemented on a modern Kepler CUDA GPU architecture, to point out pros and cons regarding performance and memory consumption of such structures. We show that a GPU KD-Tree ray traversal based on ropes achieved the best performance results. It surpasses the BVH, often used as primary structure on state-of-the-art ray tracers. Compared to BVHs, a carefully well implemented ropes-based KD-Tree is from 13 to 71% faster. However, it may consume up to 9x more memory than other structures. This disadvantage can be a limiting factor on memory limited architectures. Keywords: sledování paprsku; algoritmy traversace paprsku; reprezentace scény pomocí hierarchie obálek; octree; uniformní mřížky; kd strom; ray tracing; ray traversal algorithms; bounding volume hierarchy; octree; uniform grids; kd tree; bounding interval hierarchy Available in digital repository of ZČU. Review and Comparative Study of Ray Traversal Algorithms on a Modern GPU Architecture

In this paper we present a chronological review of five distinct data structures commonly found in literature and ray tracing systems: Bounding Volume Hierarchies (BVH), Octrees, Uniform Grids, ...

dos Santos, Artur Lira; Teichrieb, Veronica; Lindoso, Jorge
Západočeská univerzita v Plzni, 2014