A novel enhanced connection of AC/AC powertrain for HEV - modelling and simulation results

The paper deals with a novel enhanced connection of AC/AC powertrain for Hybrid Electric Vehicles (HEV). The substantial contribution of such a connection is the absence of 4QC auxiliary converter needed for autonomous and hybrid operational modes and its compensation by power-lesser 0x5 matrix converter. The main advantages of a simplified connection are, beside smaller auxiliary converter sizing, also possible better efficiency of the HEV powertrain. So, powertrain operation in autonomous traction accu-battery modes uses direct 0x5 configuration of traction 3x5 MxC matrix converter, and in hybrid modes of Internal Combustion Engine (ICE) and accu-battery uses besides traction 3x5 MxC matrix converter the auxiliary 0x5 matrix converter. Modeling and simulation using Matlab-Simulink environment of traction powertrain configuration in autonomous modes are presented in the paper as well as all simulation experiment result

Automata Systems

Táto bakalárska práca sa zaoberá automatovými systémami, konkrétne definuje stavovo a pravidlovo kontrolované paralelné typy automatových systémov, ktorých komponentmi sú konečné automaty, na základe rozboru a skúmania princípov už existujúcich systémov. Taktiež sú práci porovnávané tieto nové systémy s týmy existujúcimi, sú skúmané ich vlastnosti a možnosť transformácie stavovo kontrolovaného paralelného automatového systému na pravidlovo kontrolovaný paralelný automatový systém a aj opačne.This bachelor thesis deals with automata systems, especially the ones, which are defined as state and or rule controlled parallel automata systems. Their components are finite automata systems. Definitions are retrieved from analyzing and researching already existing automata systems. In the thesis, a comparison of these systems is made with systems defined a priori. The thesis also analyzes first features of these systems, and second a possibilities of transforming the state controlled parallel automata system into the rule controlled parallel automata system and vice versa.

Analiza materijala elektroda za elektrootporno točkasto zavarivanje

The contribution deals with metallographic analysis of welding tip materials and workpieces used in production. Microstructures of most used alloys Cu for welding electrodes of resistance spot welding are evaluated. Alloys of CuCr1Zr, CuCoBe and CuBe2. Analysis of influence of alloying elements and production technology of the alloys on final properties of electrode materials are presented.Ovaj rad se bavi metalografskom analizom materijala elektroda za elektrootporno točkasto zavarivanje koji se koriste u proizvodnji. Mikrostrukture najčešće korištenih legura Cu za izradu otpornih elektroda za točkasto zavarivanje su evaluirane. Analizirane su legure: CuCr1Zr, CuCoBe i CuBe2. Analiza utjecaja legirajućih elemenata i tehnologije proizvodnje legura na konačna svojstva materijala elektroda je također predstavljena u radu

K filozofii vzdělávání a výchovy: Filozoficko-edukačné modely v situácii sociokultúrnej mnohosti

Príspevok poukazuje na fundamentálnu diverzitu východísk súčasných filozoficko-edukačných teorií reflektujúcich sociokultúrnu mnohost’ a snaží sa pomocou troch teoretických modelov vyjadriť základné póly tejto diverzity. Tieto póly sú následne predmetom vzájomnej komparácie, čím sa ukážu ich teoretické obmedzenia, ale aj hranice ich edukačného realizovania.Príspevok poukazuje na fundamentálnu diverzitu východísk súčasných filozoficko-edukačných teorií reflektujúcich sociokultúrnu mnohost’ a snaží sa pomocou troch teoretických modelov vyjadriť základné póly tejto diverzity. Tieto póly sú následne predmetom vzájomnej komparácie, čím sa ukážu ich teoretické obmedzenia, ale aj hranice ich edukačného realizovania

Compression of IP Flow Records

Diplomová práce pojednává o problémech komprese toků v síťových zařízeních. Od řešení se očekává úspora paměti toků a ulehčení zpracování síťového provozu. V úvodu jsou popsány protokoly sloužící pro ukládání a manipulaci s daty, následuje rozprava o možnostech současných kompresních metod. V další části je podrobná analýza zdrojových dat, která odhaluje jejich strukturu a složení. Přináší užitečné poznatky, které jsou dále použity při testování, zkoumání možností a využití existujících kompresních metod při kompresi toků. Práce posléze experimentuje se ztrátovou kompresí, kde na základě výsledků testů, dojde k popsání nového přístupu komprese založeného na ztrátové kompresi a klustrování toků. Závěrečná část práce obsahuje zhodnocení této metody a celkovou sumarizaci práce s nabídnutými návrhy možného pokračování vývoje v této problematice.My Master's thesis deals with the problems of flow compression in network devices. Its outcome should alleviate memory consumption of the flows and simplify the processing of network traffic. As an introduction I provide a description of protocols serving for data storage and manipulation, followed by discussion about possibilities of compression methods that are employed nowadays. In the following part there is an in-depth analysis of source data that shows the structure and composition of the data and brings up useful observations, which are later used in the testing  of existing compression methods, as well as about their potential and utilization in flow compression. Later on, I venture into the field of lossy compression and basing on the test results a new approach is described, created by means of flow clustering and their subsequent lossy compression. The conclusion contains an evaluation of the possibilities of the method and the final summary of the thesis along with various suggestions for further development of the research.

Školská penalita a sociálna moc: Pedagogické súvislosti sociálno-filozofickej koncepcie moci M. Foucaulta

Príspevok nadväzuje na typológiu trestnej moci francúzskeho filozofa M. Foucaulta a snaží sa ju paralelizovať so školskou realitou a podobami penálnej praxe v rámci nej.The article refers to the typology of punitive power of French philosopher M. Foucault and tries to parallelize it with school reality and forms of penal practice within this reality

DEFORMATION INFLUENCE ON A LIFETIME OF WELDING ELECTRODE TIPS

The contribution deals with the influence of welding electrode tips deformation on their lifetime. The influence of material properties, production technology and the intensity of welding electrodes load on their lifetime are presented. The electrode tips of the most used type of CuCr1Zr alloy of three basic standard shapes before and after the process of welding are evaluated. The process of welding is realized with low, middle and maximum welding parameters on programmable pneumatic spot welding machine VTS BPK 20. The influence of welding parameters on chosen material characteristics of welding tips is observed. Through the use of upsetting test, dependency of forming strength and deformation of material on used technology of welding tip production is observed

FORMABILITY OF THIN SHEETS FROM ALUMINUM ALLOYS

In this contribution there have been evaluated properties of four types of sheets made from aluminium alloys. In the case of each of the examined sheets there has been checked its shearing ability via the influence of punch-die clearance change on the quality of blanking edge. Quality of blanking edge is characterized by a ratio of plastic zone height to the total thickness of the sheared material. Formability during the drawing process was measured with earring test. Results are presented by the earring coefficient (unequal height) of the cups

Plastic Formed and Spot Welded Joints Strength of S350GD+Z Steel

This paper presents a research of the lap joint shear strength of S350GD+Z sheet material joined by resistance spot welding. The resistance spot welding process was done for five values of welding current. The joints strength structure analysis was done for the shearing curves. The influence of the welding current on the joints maximum strength and the shear curve of the resistance spot welded joints was presented. Welding current increase influence efficiency on the joints strength was analyzed. The analysis of the cold plastic formed joining technologies (clinching) was also presented. The clinching joints were made by using different tool types and uniform values of embossment minimum thickness. The influence of tool shape on the joint strength was described. In the case of round clinching joints the influence of forming force increase on the joints strength was studied