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Dissertations / Theses on the topic 'PM elements'

Author: Grafiati

Published: 5 June 2025

Last updated: 16 July 2025

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1

Apel, Th, F. Milde, and M. Theß. "SPC-PM Po 3D --- Programmers Manual." Universitätsbibliothek Chemnitz, 1998. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-199800848.

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The experimental program ¨SPC-PM Po 3D¨ is part of the ongoing research of the Chemnitz research group Scientific Parallel Computing (SPC) into finite element methods for problems over three dimensional domains. The package in its version 2.0 is documented in two manuals. The User's Manual provides an overview over the program, its capabilities, its installation, and handling. Moreover, test examples are explained. The aim of the Programmer's Manual is to provide a description of the algorithms and their realization. It is written for those who are interested in a deeper insight into the code,

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2

Schutte, Jacques. "Optimisation of a transverse flux linear PM generator using 3D Finite Element Analysis." Thesis, Stellenbosch : Stellenbosch University, 2011. http://hdl.handle.net/10019.1/17930.

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Thesis (MScEng)--Stellenbosch University, 2011.<br>ENGLISH ABSTRACT: Several transverse flux and longitudinal flux linear generator topologies exist for freepiston Stirling engine applications. In this thesis the transverse flux permanent magnet linear generators are investigated together with a back-to-back converter which can deliver the electrical energy from the linear generator to the electrical network. The transverse flux permanent magnet linear generator is geometrically optimised with the aim to maximise the power-to-weight ratio while maintaining preset power and efficiency lev

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3

Huang, Xinxin. "PM 2.5: The Contribution of Coal Burning to Air Pollution in Beijing." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-211686.

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Due to the rapid economic growth and industrial development in China, the constantly soaring upGDP has made many people believe that the golden age of China has come. But along with the boomingdevelopment, the neglect and violation of the natural environment has brought intensive discussion and criticism.Moreover, during past decades, frequent natural disasters and extreme weathers resulting from human activitieshave made local dwellers suffer from economical loss, as well as physical harm. Thus more attention fromwithin the country has been drawn to the environmental issues; media reports, na

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4

Taran, Narges. "Optimum Design of Axial Flux PM Machines based on Electromagnetic 3D FEA." UKnowledge, 2019. https://uknowledge.uky.edu/ece_etds/145.

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Axial flux permanent magnet (AFPM) machines have recently attracted significant attention due to several reasons, such as their specific form factor, potentially higher torque density and lower losses, feasibility of increasing the number of poles, and facilitating innovative machine structures for emerging applications. One such machine design, which has promising, high efficiency particularly at higher speeds, is of the coreless AFPM type and has been studied in the dissertation together with more conventional AFPM topologies that employ a ferromagnetic core. A challenge in designing coreles

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5

Al-ou'n, Ashraf M. S. "VM Allocation in Cloud Datacenters Based on the Multi-Agent System. An Investigation into the Design and Response Time Analysis of a Multi-Agent-based Virtual Machine (VM) Allocation/Placement Policy in Cloud Datacenters." Thesis, University of Bradford, 2017. http://hdl.handle.net/10454/16067.

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Recent years have witnessed a surge in demand for infrastructure and services to cover high demands on processing big chunks of data and applications resulting in a mega Cloud Datacenter. A datacenter is of high complexity with increasing difficulties to identify, allocate efficiently and fast an appropriate host for the requested virtual machine (VM). Establishing a good awareness of all datacenter’s resources enables the allocation “placement” policies to make the best decision in reducing the time that is needed to allocate and create the VM(s) at the appropriate host(s). However, current a

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6

Ježek, Přemysl. "Pevnostně deformační analýza uchycení filtru pevných částic na traktoru." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2012. http://www.nusl.cz/ntk/nusl-230021.

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The subject of this thesis is to carry out stress-strain analysis of diesel particulate filter support on tractor. So it describes sequence of steps for the analysis model, such as geometry description, mesh generation, applied forces definition and others. Result of the analysis is assessed in terms of strength and improvement was proposed.

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7

Vaseghi, Babak. "Contribution à l'étude des machines électriques en présence de défaut entre-spires : modélisation - Réduction du courant de défaut." Thesis, Vandoeuvre-les-Nancy, INPL, 2009. http://www.theses.fr/2009INPL090N/document.

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Le principal objectif de nos travaux était l’établissement de modèles suffisamment précis pour étudier le comportement des machines électriques en présence d’un défaut de court-circuit entre spires et d’en déduire les signatures pertinentes pour la détection de ce type de défaut. L’autre objectif était de dimensionner des machines électriques à courant de court-circuit d’amplitude limitée pour réduire le risque de propagation du défaut. La première approche de modélisation consiste à effectuer une étude complète en utilisant la méthode d’éléments finis pas à pas dans le temps. Les résultats ob

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8

Nguyen, Martin. "Stavební průzkum a hodnocení stavu konstrukce." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2017. http://www.nusl.cz/ntk/nusl-265486.

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This diploma thesis deal with the building survey and evaluating the state of existing constructions. In theoretical part are described the types of civil engineering surveys and diagnostic methods for conducting a survey of reinforced concrete structures. The practical part deal with describes the structural and technical survey of the production hall in the industrial area Fatra Napajedla, evaluating the strength of concrete on the existing structure through donations cores and verification of compliance with the reinforcement according to project documentation. The last part is focused on a

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9

Vaseghi, Babak. "Contribution à l'étude des machines électriques en présence de défaut entre-spires : modélisation - Réduction du courant de défaut." Electronic Thesis or Diss., Vandoeuvre-les-Nancy, INPL, 2009. http://www.theses.fr/2009INPL090N.

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Le principal objectif de nos travaux était l’établissement de modèles suffisamment précis pour étudier le comportement des machines électriques en présence d’un défaut de court-circuit entre spires et d’en déduire les signatures pertinentes pour la détection de ce type de défaut. L’autre objectif était de dimensionner des machines électriques à courant de court-circuit d’amplitude limitée pour réduire le risque de propagation du défaut. La première approche de modélisation consiste à effectuer une étude complète en utilisant la méthode d’éléments finis pas à pas dans le temps. Les résultats ob

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10

Shiao, Ya-Wen, and 蕭雅文. "Characteristics of metallic elements in PM over Taichung and an analysis of the possible sources." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/92574734652922458269.

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碩士<br>國立中興大學<br>環境工程學系所<br>98<br>In this study, two intensive ambient aerosol experiments were conducted during August 14 to 19 and November 4 to 7 in 2009 at Chinshui, Dadu mountain, Dali and Fengyuan stations in Taichung area. PM2.5 and PM2.5-10 were sampled by using high volume air samplers. The collected samples were further analyzed for 20 metallic elements (Al, Fe, Na, Mg, K, Ca, Sr, Ti, Mn, Ba, Ni, Cu, Zn, Cd, Sb, Pb, V, Cr, As and Se) by using microwave digestion method and determined with inductively coupled plasma mass spectrometry (ICP-MS). The purpose of this study was to investiga

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11

Liu, Chia-Wei, and 劉家維. "Effects of PM Processing Parameters and Alloying Elements on the Magnetic Properties of Sintered Iron Powders." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/45965742289433244873.

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碩士<br>國立臺灣大學<br>材料科學與工程學研究所<br>99<br>Iron and iron-base alloys made by Press and Sinter (P/S) process and Metal Injection Molding (MIM) process, are now widely used in a variety of electronic applications. The advantages of P/S and MIM parts include high yield and low cost. However, due to the polymeric binder added to the green parts, impurity level could be too high to achieve good magnetic properties. Four kinds of carbonyl iron powders are used in this study. The magnetic properties are measured after sintering in different heating rates, sintering temperatures and sintering atmospheres. I

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12

Habib, FOUAD. "A Finite Element Model for Ejection of Green Parts After PM Compaction." Thesis, 2008. http://hdl.handle.net/1974/1542.

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The present study describes the development of an FE model of tooling during production of a transmission gear. Results of the simulation at the puck/die interface during ejection examine the behavior of friction. Machine component deflections under pressure and areas of wear/binding are also predicted. The tooling was developed and modeled in Abaqus, an FE pre- and post-processor. A metal PM (Powder Metallurgy) puck is simulated from the point at the end of compaction, and then at several positions during ejection. A test setup was designed and built. The apparatus will be used to create iron

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13

Cias, A., and Stephen C. Mitchell. "Processing and Ductile-Brittle Transitions in PM Manganese Steels." 2005. http://hdl.handle.net/10454/892.

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Yes<br>Brittleness in manganese steels can be associated with processing in a "wet¿ [micro]climate resulting in the formation of continuous oxide networks. The formation of these networks can be prevented by sintering in an atmosphere, also ¿local¿ in a semiclosed container, adhering to the Ellingham-Richardson oxide reduction criteria. When this requirement is satisfied, however, further types of ductile ¿ brittle transitions are observed. Rapid cooling, typically above 40°C/min, produces enough martensite to render Fe-(3-4)Mn-(0·6-0·7)C material macroscopically brittle. Quenched and co

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14

Li, Chia-Chi, and 李家齊. "Effects of Atmosphere and Alloying Element on the Carbon Content in Sintered PM Steels." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/18107381551721325876.

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碩士<br>臺灣大學<br>材料科學與工程學研究所<br>96<br>Powder metallurgy (PM) process has been used widely in the industry due to its capability of making net shape products economically. Similar to most wrought steels, carbon is the most important alloying element for PM steels and is usually added in the graphite powder form. The graphite powders are homogenized during sintering. Previous studies have shown that the composition and flow rate of the atmosphere and the alloying elements are critical in determining the final amount of the dissolved carbon. These effects are further investigated in this study. The

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15

Youseffi, Mansour, and N. Showaiter. "PM processing of elemental and prealloyed 6061 aluminium alloy with and without common lubricants and sintering aids." 2006. http://hdl.handle.net/10454/3942.

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No<br>A comparison has been made between compaction, sintering, microstructural and mechanical properties of the 6061 aluminium alloy prepared via premixed elemental (EL) and prealloyed (PA) powders (as received and degassed) with and without additions of sintering aids and various solid and/or liquid lubricants. Both EL and PA powders were cold pressed at different pressures, ranging from 250 to 770 MPa, and sintered under vacuum in the range 580-640°C for 30-120 min. and then under pure nitrogen atmosphere for comparison. Vacuum degassing of the PA powder provided better compressibility and

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16

Greene, David Scott. "Comparison between Tapered Element Microbalance (TEOM) and Federal Reference Method (FRM) for PM₂[subscript decimal point]₅ measurement in East Tennessee." 2005. http://etd.utk.edu/2005/GreeneDavid.pdf.

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Thesis (M.S.) -- University of Tennessee, Knoxville, 2005.<br>Title from title page screen (viewed on June 28, 2005). Thesis advisor: Wayne T. Davis. Document formatted into pages (ix, 82 p. : ill. (some col.), col. maps). Vita. Includes bibliographical references (p. 58-67).

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17

FREZZINI, MARIA AGOSTINA. "Investigation of the contribution of emission sources to atmospheric particulate matter concentration (PM) and to its redox properties." Doctoral thesis, 2022. http://hdl.handle.net/11573/1637945.

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In the last few years, various epidemiological studies were conducted to estimate the health effects of particulate matter (PM) on human population, placing at the core the association between exposure to PM and several adverse outcomes, especially on cardiovascular and respiratory systems. PM mass concentration is typically used to estimate population exposure. However, this indicator misestimate the overall impact of PM, since it does not consider the multiple toxicological effects of the different pollutants that constitute and determine the intrinsic properties of PM. In fact, the complexi

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18

MASSIMI, LORENZO. "New Insights for Health and Environmental Impact Assessment of PM Released by Specific Emission Sources." Doctoral thesis, 2020. http://hdl.handle.net/11573/1358604.

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This study is aimed to improve the knowledge about the association between health and environmental effects of particulate matter (PM) and its chemical composition and sources and it is focused on the integration of different observation systems and monitoring techniques. PM samples originated from different sources were collected and analyzed by traditional and innovative analytical methods, thus reaching a very detailed knowledge of their inorganic and organic chemical composition. (A) Acellular assays: 1,4-dithiothreitol (DTT), ascorbic acid (AA) and 2',7'dichlorodihydrofluorescein (DCFH),

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19

Oliveira, Ana Rita Gonçalves. "Propriedades químicas de poeiras atmosféricas recolhidas na região de Estarreja e potencial impacto na saúde humana." Master's thesis, 2019. http://hdl.handle.net/10773/29496.

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A região de Estarreja alberga um dos mais importantes centros da indústria petroquímica nacional, o Complexo Químico de Estarreja (CQE). O desenvolvimento industrial promoveu a evolução da rede viária e ferroviária assim como o crescimento populacional, o que tem contribuído para a degradação da qualidade do ar da região, com consequentes impactos tanto na saúde pública e bem-estar da população, como na fauna e na flora. A presente dissertação teve como principais objetivos a avaliação da qualidade das poeiras atmosféricas do concelho de Estarreja, identificar potencias fontes de contribuição

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20

(8741097), Ritwik Bandyopadhyay. "ENSURING FATIGUE PERFORMANCE VIA LOCATION-SPECIFIC LIFING IN AEROSPACE COMPONENTS MADE OF TITANIUM ALLOYS AND NICKEL-BASE SUPERALLOYS." Thesis, 2020.

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<div>In this thesis, the role of location-specific microstructural features in the fatigue performance of the safety-critical aerospace components made of Nickel (Ni)-base superalloys and linear friction welded (LFW) Titanium (Ti) alloys has been studied using crystal plasticity finite element (CPFE) simulations, energy dispersive X-ray diffraction (EDD), backscatter electron (BSE) images and digital image correlation (DIC).</div><div><br></div><div>In order to develop a microstructure-sensitive fatigue life prediction framework, first, it is essential to build trust in the quantitative predic

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