• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 8
  • 1
  • Tagged with
  • 9
  • 9
  • 8
  • 8
  • 8
  • 8
  • 6
  • 6
  • 6
  • 6
  • 6
  • 6
  • 6
  • 6
  • 6
  • 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.
1

Oceňování prací při pozemkových úpravách / Valuation of works in the land consolidation

Naňka, Martin January 2013 (has links)
The aim is to comprehensively describe the problems of land consolidation plans and prepare budgets of joint facilities performed in a frame of the landscaping. For individual plans of common facilities, cards of budgetary indicators will be processed. Finally, we will evaluate the resulting processed budgets and budget indicators.
2

Développement des joints de grain et des joints de phase dans les carbures cémentés WC-CO / Development of grain boundaries and phase boundaries in WCCo cemented carbides

Pellan, Maxime 10 December 2015 (has links)
Le carbure cémenté (WC-Co) est un système biphasé constitué de grains de carbure de tungstène enrobés dans un liant à base de cobalt. Dans ce matériau composite, qui allie donc la dureté du carbure à la résilience du cobalt, la maîtrise de la microstructure est un paramètre clef pour l’optimisation des propriétés mécaniques.Le but de ce travail est de mettre au jour les mécanismes régissant le développement des joint de grain et des joints de phase lors du frittage. L’effet de la teneur en liant, du taux de carbone et du temps de frittage ont été particulièrement étudiés.Ce travail est basée sur la caractérisation du matériau par EBSD (Electron BackScattered Diffraction), une méthode qui facilite la séparation des grains et donc l’utilisation de techniques d’analyse d’image pour étudier la microstructure. En outre un programme basé sur les données d’orientation des grains collectées par EBSD et permettant l’analyse de la texturation des joints de grain et des joints de phase a été développé pour cette étude.L’étude de la contiguité montre qu’elle ne dépend pas du taux de frittage ni de la teneur en carbone du liant, mais essentiellement de la fraction volumique de liant. Cela implique que l’encombrement et l’imbrication des particules sont les principaux paramètres entrant en compte dans l’établissement de la contiguité. Un grossissement plus rapide et plus marqué a été observé dans les échantillons riches en carbone, ainsi que dans ceux présentant un fort taux de liant. Un grossissement anormal a été observé dans les échantillons riches en carbone et à fort taux de liant. La désorientation aux joints de grains est caractérisée par un couple axe/angle décrivant la rotation liant les deux cristaux. L’étude de la distribution des axes a révélé que trois rotations sont particulièrement abondantes : celles autour de [101 ̅0], [21 ̅1 ̅0] et [0001]. Elles représentent environ 30% de la surface totale des joints de grains. Pour chacune des rotations particulières ont été détectées : [101 ̅0]/90°, [21 ̅1 ̅0] / (48°- 60°- 90°) et [0001]/90°. L’étude de la géométrie de ces joints suggère que leur remarquable stabilité est due au fort taux de cohérence dans le plan de joint. L’analyse statistique des plans de joint de grain et de joint de phase montre que la plupart d’entre eux correspond à un plan basal ou prismatique pour au moins l’un des deux grains (70% environ de la surface totale de joint de grain, et 50% environ de la surface totale de joint de phase). Sur la base de ces résultats, un scénario décrivant l’évolution de la microstructure durant le frittage est finalement proposé. / WC-Co cemented carbide is a two phase system constituted of a cobalt based binder matrix embedding hard tungsten carbide grains. This material is especially used in fields such as metal cutting or mining, where high mechanical properties are required. Therefore, the microstructure is a key parameter to control to optimize the mechanical properties of the alloy.This work aims at understanding the mechanisms of grain boundary and phase boundary development during sintering, and how they may influence the final microstructure. The effect of the binder content, carbon content and sintering time was especially investigated.Electron BackScattered Diffraction characterization was chosen to conduct this study. First because the precise separation of grains in the resulting images makes possible automation of the measurements, and thus allows a statistical analysis of several microstructural parameters (as grain size, contiguity) on numerous samples. Secondly because orientation data collected by this way make possible the analysis of grain boundary and phase boundary texture. To this end, an automated method was developed for analysis of grain boundaries and estimation of remarkable boundary planes fraction from 2D EBSD measurements.The study of contiguity shows that it does not depend on sintering time or carbon content in the binder, but essentially of the carbide grain volume fraction. This result implies that impingement is the first order parameter in the evolution of contiguity. Grains appear to grow faster and in a larger extent in samples with a carbon rich binder, as well as in high binder content samples. Abnormal grain growth seems to be favored by high binder content in carbon rich samples. All grain boundaries were characterized by a couple of rotation axis and misorientation angle. Three particular rotation axes were identified: [101 ̅0], [21 ̅1 ̅0] and [0001]. They represent around 30% of the total grain boundary surface area. In addition, specific rotations were found to be particularly abundant in the microstructure: [101 ̅0]/90°, [21 ̅1 ̅0] / (48°- 60°- 90°) and [0001]/90°.A study of their geometry suggests that their stability would be due to a particularly coherent boundary plane. A statistical analysis shows that most grain boundaries and phase boundaries have a habit plane parallel to a basal or prismatic plane (about 70% of the total grain boundary surface area and 50% of the total phase boundary area. Finally, a scenario is proposed for the microstructure development model during sintering of cemented carbides on the basis of the results.
3

Návrh systému polních cest v rámci plánu společných zařízení / Design of the rural roads system within the plan of common facilities

VÁCHA, Jan January 2018 (has links)
The key issue of the submitted diploma thesis is road plan proposal as part of the plan of joint facilities for komplex land consoladition in the cadastral area Hradiště u Kaplice. The introductory chapters are focused on the theoretical basis of the thesis and the analysis of professional literature, followed by the methodology of the procedure and criteria of the design of the field paths in the plan of common facilities. An essential part of the thesis is the evaluation of a detailed field survey, a proposal for reconstruction and completion of the road network. The final part of thesis evaluates results of the proposed measures for land access. The results of the work are processed in text and graphical form.
4

Zpracování plánu společných zařízení v komplexní pozemkové úpravě ve zvolené lokalitě

NÝDLOVÁ, Barbora January 2019 (has links)
This master thesis deals with the elaboration of a plan regarding collective facilities in complex land consolidation within the cadastral area of Ločenice municipality. Introductory chapters focus on the theoretical part, in which land consolidation is described as well as the scope of exploratory work, which are necessary for the elaboration of the plan and its content. The content of the practical part is the evaluation of detailed survey of the terrain in the area of interest and the subsequent proposal of particular measures according to methodology. In conclusion, the results which emerged from the plan of collective facilitiesare evaluated. The results are processed in text and graphic form.
5

Návrh plánu společných zařízení ve zvolené lokalitě

ROLNÍKOVÁ, Jitka January 2019 (has links)
The diploma thesis is devoted to the elaboration of a plan of common facilities in the cadastral area Přídolí. The work focused on the methodological procedure in the implementation of ground adaptations, according to technical and metodical standards. The content of the first part is a literature review, which not only describes the field of land consolidation and its course, but also specifies the plan of common facilities together with the scope of work necessary for its elaboration. Everything important in this section is theoretically described. In the second practical part, attention is paid to the selection of the territory and the evaluation of its condition with the help of exploratory works. Further to the field research, the practical part is focused mainly on the proposal of individual proceedings concerning the protection of ZPF, elements of TSES, water management elements and ensuring access to lands. The results of surveys and draft measures are presented in both text and graphic form.
6

Zpracování plánu společných zařízení v komplexní pozemkové úpravě ve zvolené lokalitě / Processing of common facilities plan in the complex land consolidation in selected area

ŠVECOVÁ, Markéta January 2017 (has links)
The subject of this thesis is to elaborate plan of common facilities in the complex land adjustment in the selected location. The plan of common facilities includes a set of measures which are designed to create the conditions for rational management, and also ensure the protection of natural resources. Solution site is the village Lhotka. The thesis contains a description and evaluation of the cadastral area, focusing on measures to make available land for erosion control land resources, measures for the creation and protection of the environment and water management measures. The results are contained in text form, as well as graphic, processed through the program ArcGIS.
7

Porovnání zásad tvorby KPÚ v zahraničí a v ČR / Comparison of the principles of complex land adjustment abroad and in the Czech republic

MARYŠKOVÁ, Kateřina January 2014 (has links)
This thesis builds on my bachelor thesis. It deals with land consolidation in the Czech Republic and abroad. The aim is to show how the process of land consolidation taking place in the Czech Republic and especially to show the process in the state of Bavaria, Poland and Slovak Republic. There is a focus on who is involved in land consolidation, who is driving, what are the forms of funding and consequently their comparison. This thesis aims to show what you are landscaping in individual countries similar and what is different on the contrary.
8

Dokumentace plánu společných zařízení pro komplexní pozemkovou úpravu / Documentation of common facilities plan for the complex land consolidation

TICHATZEK, Aleš January 2018 (has links)
The key issue of the submitted diploma thesis is plan of joint facilities for complex land consoladition in the cadastral area Strážkovice. The introductary chapters focus on the purpose and theoretical solutions of the thesis and on the analysis of expert literature to which it follows the methodology determining process and criteria of proposal in plan of joint facilities. The key part of the thesis is evalution of detailed exploration and proposal of individual measures. The final part of the thesis evaluates the results resulting of processing documentation plan of joint facilities. The results of the thesis are processed in text and graphic form.
9

Zpracování plánu společných zařízení pro komplexní pozemkovou úpravu

ANDREJKOVÁ, Michaela January 2019 (has links)
This diploma thesis is focused on the elaboration of a plan of joint facilities for comprehensive land treatment in the selected cadastral territory of Dolní Třebonín, located in the South Bohemian Region. The purpose of the thesis is the characterization and evaluation of the cadastral area as part of the need to implement these joint facilities: anti-erosion measures for the protection of agricultural land resources, measures for access to land, measures for protection and creation of the environment and water management measures. The theoretical part of this work is literary research. This section explains basic concepts such as land treatment, forms of land treatment, exploration works and joint facilities. The practical part describes the characteristics of the selected area, the exploration work in the given area and the proposal of the common facilities. The results are processed in textual and graphical form using ArcMap 10.0.

Page generated in 0.0679 seconds