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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
201

Optimalizace predikce pozice v síti / Optimization of network position prediction

Pospíšil, Petr January 2008 (has links)
This work is about position prediction in network, it is focused to find Landmark closest to the Host in the network (with lowest distance vector). The algorithm is based on GNP system. In terms of GNP system simulation was selected method for mathematical part of position prediction. The method was Simplex Downhill. The designed algorithm was implemented in Java. In the first step chose Host continent by meassuring the distance vector. In next step is selected nearest part in the continent. In conclusion estimate Host its position and then closest Landmark. Results from this work is important for designing TTP protocol. The verdict is that the GNP can be used for TTP, but Landmarks must be located in uniform density.
202

Dvojitě vyvážený směšovač – laboratorní přípravek / Doble-balanced mixer - laboratory equipment

Dušek, Libor January 2008 (has links)
The aim of this work was double-balanced mixer implementation, which will be used like laboratory equipment. This thesis deals with design of the double-balanced mixer from first theoretical principles to a practical design of a laboratory equipment. For the practical design the integrated mixer SA612 was used. Input signal to the mixer up to 500 MHz frequency can be used. For required operation external oscillator and fifth-order low pass filter were constructed. Oscillator was designed for fixed frequency 32 MHz. Fifth-order low pass filter was inserted between the mixer and the oscillator, because of filtering higher harmonics. The second aim of the work was measuring double-balanced mixer basic parameters, such as Compression Point (P-1dB) and Intercept Point (IP3). For the IP3 measurement, another one device was required. It consists of the power combiner for mixing two frequency close signals and third-order bandpass filter, which selects required frequency band. Finally, the laboratory equipment was fabricated and its real parameters were measured.
203

Optimalizace technologie výroby odlitků ze slitin Al metodou vytavitelného modelu / Optimized manufacturing of aluminium castings by using lost wax technology

Talanda, Ivan January 2012 (has links)
Aim of this diploma thesis is to choose new pattern wax for Fimes a.s. foundry. New wax should substitute old not fully satisfactory pattern wax which caused problems in technological process resulting in increased number of rejects. New pattern wax should eliminate current problems and help foundry with producing large, thin-walled, high-quality castings. Numbers of pattern waxes supplied by world’s leading wax manufacturers were subjected to laboratory tests and pilot study. This diploma thesis is part of project Alfa TA01010766: „Research and development of production technology large, thin and high quality castings of aluminium alloys “
204

Hodnocení vlastností pojiv typu PMB obsahujících pojivo z R-materiálu / Evaluation of properties of PMB containing binder from RAP

Měšťanová, Petra Unknown Date (has links)
Subject of this diploma thesis is to describe the effect of adding different amount of aged binder recovered from RAP on the change of properties of polymer modified bitumen. The RAP containing unmodified bitumen and the RAP where we can expect bitumen modification are used to recover binder. The binder obtained from RAP is dosed into the virgin binder in amount of 15 %, 30 % and 50 %. The methods of recycling of flexible pavements, extraction and regeneration of asphalt binders, rejuvenating of their properties and methods of empirical and functional laboratory tests are described in the theoretical part. The practical part deals with evaluating and comparison of the results mixed binders properties.
205

Implementace a aplikace statistických metod ve výzkumu, výrobní technologii a řízení jakosti / Implementation and Application of Statistical Methods in Research, Manufacturing Technology and Quality Control

Kupka, Karel January 2012 (has links)
This thesis deals with modern statistical approaches and their application aimed at robust methods and neural network modelling. Selected methods are analyzed and applied on frequent practical problems in czech industry and technology. Topics and methods are to be benificial in real applications compared to currently used classical methods. Applicability and effectivity of the algorithms is verified and demonstrated on real studies and problems in czech industrial and research bodies. The great and unexploited potential of modern theoretical and computational capacity and the potential of new approaces to statistical modelling and methods. A significant result of this thesis is also an environment for software application development for data analysis with own programming language DARWin (Data Analysis Robot for Windows) for implemenation of effective numerical algorithms for extaction information from data. The thesis should be an incentive for boarder use of robust and computationally intensive methods as neural networks for modelling processes, quality control and generally better understanding of nature.
206

Vliv foam rolleru na svalové napětí po zátěži / Effect of foam roller application on muscle tone after physical load

Patschová, Miroslava January 2019 (has links)
Title: The effect of foam roller on muscle tone after physical load Objectives: The aim of this thesis was to summarize theoretical knowledge about muscle, changes in muscle tension and possibilities of its affect. The aim of the practical part was to find out the effect of the foam roller on muscle tone after exercise. Methods: Practical part of this thesis was processed in biomechanical laboratory at FTVS UK in Prague and included 16 probands. We measured muscle tone of biceps brachii, m. triceps surae and m. quadriceps femoris before exercise, then the probands performed an activity aimed at increasing the muscular tension of the musculature mentioned above, after which we measured the muscle tension again. The foam rolling of each muscle group lasted for 60 seconds and then we measured the muscle tone for the last time. A myotonometer device was used and the data were transmitted by KISTLER MULTICHANNEL CHARGE AMPLIFIER and processed by the DeweSoftX3 (64 bit) programme in SIRIUS DEWEsoft S-BOX2 computer. At the end, we compared measured values with subjective sensations of the probands who filled quick questionnaire. Results: The measurement showed that after exercise, the muscular tensions of the muscle groups we selected increased, and at the same time that the application of the foam roller...
207

Čtyřstěny a jejich vlastnosti / Tetrahedra and their properties

ČERVENKOVÁ, Kateřina January 2019 (has links)
This diploma thesis Tetrahedra and their properties summarizes the basic properties of tetrahedron. The main goal is to introduce the topic to a reader of this thesis. Author would like to provide basic information about the particular types of tetrahedra and their properties. I try to examine there a spatial analogy of selected terms of a triangle. Conditions for the existence of the orthocenter of a tetrahedron are derived. Then for a non-orthocetric tetrahedron the Monge point as its generalization is introduced. By most properties their proofs are given. In the final part worksheets for pupils of primary and secondary schools are designed. Pictures in the thesis are created in a geometrical program called GeoGebra 3D. These pictures can help the reader to understand this problem.
208

Diferenciální počet více proměnných pro studenty učitelství 2.stupně ZŠ / The differential calculus of functions of several variables

BEŇADIK, Vladislav January 2011 (has links)
This thesis includes solving the basic examples of differential calculus (especially two and three variables). The work covers examples of the solutions of the domain, the first and second partial derivatives, determining the functions of local extremes (both explicitly and implicitly given) and find the equation of the tangent plane to a point in the graphs of functions. The examples are sorted by difficulty.
209

Struktura a aproximace reálných rovinných algebraických křivek / Structure and approximation of real planar algebraic curves

Blažková, Eva January 2018 (has links)
Finding a topologically accurate approximation of a real planar algebraic curve is a classic problem in Computer Aided Geometric Design. Algorithms describing the topology search primarily the singular points and are usually based on algebraic techniques applied directly to the curve equation. In this thesis we propose a more geometric approach, taking into account the subsequent high-precision approximation. Our algorithm is primarily based on the identification and approximation of smooth monotonous curve segments, which can in certain cases cross the singularities of the curve. To find the characteristic points we use not only the primary algebraic equation of the curve but also, and more importantly, its implicit support function representation. Using the rational Puiseux series, we describe local properties of curve branches at the points of interest and exploit them to find their connectivity. The support function representation is also used for an approximation of the segments. In this way, we obtain an approximate graph of the entire curve with several nice properties. It approximates the curve within a given Hausdorff distance. The actual error can be measured efficiently. The ap- proximate curve and its offsets are piecewise rational. And the question of topological equivalence of the...
210

Moderní metody řízení nákladů / Modern methods of cost management

SLÁDKOVÁ, Kateřina January 2013 (has links)
The main objective of this thesis is to analyze the costs of a organization with fictitious name PROFIL Ltd. for the period 2007 - 2012 and then propose measures to improve the performance of the company by optimizing various cost types. The theoretical part describes the traditional tools and modern methods of cost management. The application part is focused on the characteristics of organization, evaluation of its financial situation during the reporting period, analysis of cost structures, analysis of break-even point, estimation of cost functions and analysis of organization?s individual cost items, followed by drawing conclusions and action plans.

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