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Dissertations / Theses on the topic 'Air variables'

Author: Grafiati

Published: 4 June 2025

Last updated: 1 August 2025

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1

Smith, Benjamin L. "Pilot fatigue detection using aircraft state variables." Morgantown, W. Va. : [West Virginia University Libraries], 2008. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=5607.

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Thesis (M.S.)--West Virginia University, 2008.<br>Title from document title page. Document formatted into pages; contains v, 88 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 57-59).

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2

Hu, Zhiguang. "Binary latent variable modelling in the analysis of health data with multiple binary outcomes in an air pollution study in Hong Kong /." Hong Kong : University of Hong Kong, 1997. http://sunzi.lib.hku.hk/hkuto/record.jsp?B19588975.

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3

Adlan, Mohd Nordin Bin. "A study of dissolved air flotation tank design variables and separation zone performance." Thesis, University of Newcastle Upon Tyne, 1998. http://hdl.handle.net/10443/409.

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A study of velocity and turbidity distributions in the separation zone of dissolved air flotation (DAF) tanks was carried out at Franldey and Trimpley Water Treatment Works of Severn Trent Water. Sampling of velocity was made using an Acoustic Doppler Velocimeter (ADV). The instrument is capable of measuring velocities as low as 1 mmlsec and producing three dimensional velocity data. Sixty-four points set at equal intervals within the tank were monitored and the flow rate corresponding to the velocity for each point was recorded. The same points were used for the sampling of turbidity within t

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4

Baker, Larry Earle. "The relationship between higher education curricular variables and human flight performance in a preliminary flying training program." FIU Digital Commons, 1988. http://digitalcommons.fiu.edu/etd/1377.

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The ability of the United States Air Force (USAF) to sustain a high level of operational ability and readiness is dependent on the proficiency and expertise of its pilots. Recruitment, education, training, and retention of its pilot force are crucial factors in the USAF's attainment of its operational mission: defense of this nation and its allies. Failure of a student pilot during a training program does not only represent a loss of costly training expenditures to the American public, but often consists of loss of human life, aircraft, and property. This research focused on the Air Force Rese

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5

Mamat, Rizalman. "Performance and emission characteristics of an automotive diesel engine using biodiesel fuel with the influence of air intake variables." Thesis, University of Birmingham, 2010. http://etheses.bham.ac.uk//id/eprint/1003/.

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The air induction system plays a major role by providing necessary air charge for combustion to take place in an engine cylinder. The pressure drop across the air intake manifold is known to have a significant effect on the indicated power of the internal combustion engine. Most car manufacturers locate the air grill at the front of a vehicle to enhance the volumetric efficiency. However due to wading performance, for a sport utility vehicle like a Land Rover Freelander the air grill is located at the side of the front tyre. The air speed at the grill side is high and creates negative pressure

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6

Cayet, Stephan. "Densite des especes dans un jet a basse pression de plasma air-vapeur d'eau en proportions variables. Experiences et modelisation." Paris 11, 1993. http://www.theses.fr/1993PA112358.

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L'etude des plasmas d'air et de leur desionisation par injection d'eau sont abordees par la modelisation et par l'experience, dans la perspective des problemes de rentrees atmospheriques d'engins. Une methode de calcul des concentrations dans les melanges gazeux a deux temperatures est developpee, qui permet de connaitre les conditions d'equilibre chimique vers lesquelles relaxent nos plasmas en ecoulement. Elle est appliquee a un melange air-eau en proportions variables. La desionisation attendue en presence d'eau n'est que tres faiblement obtenue a l'equilibre chimique. Un calcul mene sur un

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7

Hu, Zhiguang, and 胡志光. "Binary latent variable modelling in the analysis of health data with multiple binary outcomes in an air pollution study in Hong Kong." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1997. http://hub.hku.hk/bib/B31237058.

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8

Kingston, Derek B. "Decentralized Control of Multiple UAVs for Perimeter and Target Surveillance." BYU ScholarsArchive, 2007. https://scholarsarchive.byu.edu/etd/1174.

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With the recent development of reliable autonomous technologies for small unmanned air vehicles (UAVs), the algorithms utilizing teams of these vehicles are becoming an increasingly important research area. Unfortunately, there is no unified framework into which all (or even most) cooperative control problems fall. Five factors that affect the development of cooperative control algorithms are objective coupling, communication, completeness, robustness, and efficiency. We classify cooperative control algorithms by these factors and then present three algorithms with application to target and pe

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9

Omer, Jérémy Jean Guy. "Modèles déterministes et stochastiques pour la résolution numérique du problème de maintien de séparation entre aéronefs." Thesis, Toulouse, ISAE, 2013. http://www.theses.fr/2013ESAE0007/document.

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Cette thèse s’inscrit dans le domaine de la programmation mathématique appliquée à la séparation d’aéronefs stabilisés en altitude. L’objectif est le développement d’algorithmes de résolution de conflits aériens ; l’enjeu étant d’augmenter la capacité de l’espace aérien afin de diminuer les retards et d’autoriser un plus grand nombre d’aéronefs à suivre leur trajectoire optimale. En outre, du fait de l’imprécision des prédictions relatives à la météo ou à l’état des aéronefs, l’incertitude sur les données est une caractéristique importante du problème. La démarche suivie dans ce mémoire s’atta

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10

Gomes, Adriana Dias. "Relações entre preferências térmicas humanas no interior de edificações e as temperaturas externas: um estudo sobre o método adotado na norma AHSRAE 55-2004." Universidade Federal de São Carlos, 2007. https://repositorio.ufscar.br/handle/ufscar/4621.

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Made available in DSpace on 2016-06-02T20:09:07Z (GMT). No. of bitstreams: 1 1612.pdf: 2927282 bytes, checksum: 0156961dd061931755aa12339ca3139f (MD5) Previous issue date: 2007-03-09<br>Financiadora de Estudos e Projetos<br>Thermal comfort is specifically related to thermal behavior in response to both indoor and outdoor air temperature. Human thermal acceptability to climate changes and its effects depend on several aspects. It relies not only on local climatic conditions, but also on personal traits which can interfere seriously with thermal preferences as well as with someone s mental and

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11

Leeper, Ronnie. "Near-surface Atmospheric Response to Simulated Changes in Land-cover Vegetation Fraction, and Soil Moisture over Western Kentucky." TopSCHOLAR®, 2009. http://digitalcommons.wku.edu/theses/108.

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A series of land-use-land-cover-change (LULCC) based sensitivity experiments, including changes in vegetation type, fractional vegetation (FV), and soil moisture (SM), over Western Kentucky were conducted to investigate atmospheric response to land-use. The choice of land-use for this study was chosen in the context of Western Kentucky’s historical LULCC. For this study, vegetation types considered were grassland, forest, and bare soil with further variations in FV for grassland and forest at 25, 50, 75, and 100 % and systematic increases and decreases in volumetric SM of 0.05, 0.10, and 0.15

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12

Coêlho, Micheline de Sousa Zanotti Stagliorio. "Uma análise estatística com vistas a previsibilidade de internações por doenças respiratórias em função das condições meteorotrópicas na cidade de São Paulo." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/14/14133/tde-20022008-224808/.

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O conhecimento antecipado das condições meteorológicas poderá ajudar a sociedade a evitar prejuízos e desperdícios de recursos humanos e materiais. Portanto, o objetivo deste estudo foi obter a partir de uma análise estatística um modelo capaz de predizer internações a partir dos dados de poluição do ar e índices biometeorológicos. Para isso, foram utilizados dados diários de 1997 a 2000, referentes à cidade de São Paulo. Os dados de internações por doenças respiratórias foram divididos em três categorias: AVAS (Afecções Vias Aéreas Superiores), AVAI (Afecções das Vias Aéreas Inferiores) e IP

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13

Wicoff, Paul. "Application and design of air-to-air variable refrigerant flow systems." Kansas State University, 2010. http://hdl.handle.net/2097/6816.

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Master of Science<br>Department of Architectural Engineering and Construction Science<br>Julia A. Keen<br>This report addresses the operation, use, and design of air-to-air variable refrigerant flow systems, also known as VRF. Relatively new to the United States, these HVAC systems have potential to reduce energy consumption and utility costs in the correct applications. Although useful in many applications, the best building types for VRF are those requiring a large number of zones and with low ventilation air requirements. The report explains design and system selection considerations and

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14

洪淵深 and Yuen-sum Hung. "Study of interactions of terminal units of a variable air volume air conditioning system." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1997. http://hub.hku.hk/bib/B31214162.

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15

Hung, Yuen-sum. "Study of interactions of terminal units of a variable air volume air conditioning system /." Hong Kong : University of Hong Kong, 1997. http://sunzi.lib.hku.hk/hkuto/record.jsp?B18696417.

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16

Chuang, Jason C. "Variable Speed Flapping Wing Micro Air Vehicle using a Continuous Variable Transmission Design." Wright State University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=wright1401813452.

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17

Tsang, Ho-on Frederick. "Time variable parameter estimation on the wind speed air quality model in Hong Kong /." Hong Kong : University of Hong Kong, 1995. http://sunzi.lib.hku.hk/hkuto/record.jsp?B14723554.

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18

Hernandez, Torres David. "Commande robuste de générateurs électrochimiques hybrides." Thesis, Grenoble, 2011. http://www.theses.fr/2011GRENT075/document.

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L'objectif de cette thèse est la conception, dans un premier temps, des différentes stratégies de commande pour un générateur hybride composé par une pile à combustible et une source auxiliaire de stockage d'énergie. L'outil des Inégalités Linéaires Matricielles (LMI) est utilisé dans la thèse pour la solution du problème de la commande robuste et multi-variables. Dans un premier temps la commande se consacre à la gestion de la partie électrique de la pile. Des stratégies de commande sont proposées pour les convertisseurs élévateurs du bus continu mais aussi pour le contrôle d'un onduleur de t

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19

Ängalid, Filip. "Utredning av behovsstyrd ventilation : En jämförelse mellan CAV och VAV." Thesis, Högskolan i Gävle, Avdelningen för bygg- energi- och miljöteknik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-13860.

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Denna rapport är ett examensarbete på C-nivå som görs i sammarbete med teknikkonsulten Ramböll. Det vanligaste sättet att ventilera en byggnad idag är med så kallad CAV-ventilation (Constant Air Volume). Denna metod bygger på att ett luftflöde bestäms för rummet och upprätthålls med konstant flöde. En annan metod är så kallad VAV (Variable Air Volume) som bygger på att flödet varierar efter behovet. Anledningen till varför man väljer VAV istället för CAV är att med CAV finns det ofta en stor risk att man överventilerar ett rum eller byggnad, just på grund av att flödet är konstant. Problemet m

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20

Ip, Kai-ming. "Dynamic response of a cooling and dehumidifying coil to variations in air flow rate /." Hong Kong : University of Hong Kong, 1997. http://sunzi.lib.hku.hk/hkuto/record.jsp?B19832369.

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21

Rosén, Malin, and Andreas Boström. "Conceptual Design of a Variable Air Inlet, JAS 39 Gripen." Thesis, Linköpings universitet, Maskinkonstruktion, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-119673.

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The JAS 39 Gripen currently has a static air inlet designed for cooling the engine bay. This inlet has been developed over the years and has consisted of several different solutions. In this master’s thesis an investigation of past and current designs has been conducted in order to develop new concepts with a variable solution. Since the static inlet is designed for a worst case scenario, long duration of flight at low altitudes and high atmospheric temperatures, the cooling produced is not always needed and instead causes an unnecessary amount of drag. Developing concepts with variable soluti

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22

Achath, Krishnadas. "Effects of carbon dioxide control systems on the performance of variable-air-volume distribution air conditioning systems." [Gainesville, Fla.] : University of Florida, 2004. http://purl.fcla.edu/fcla/etd/UFE0004563.

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23

Alshatti, Rashid Ali. "Analyses of Variable Refrigerant Flow and Exergy in Air Conditioning Systems." Scholar Commons, 2011. http://scholarcommons.usf.edu/etd/2983.

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This thesis consists of two research problems in the air conditioning (A/C) area. For the first problem, the aim is to model and simulate a variable refrigerant flow (VRF) air conditioning system. The coefficient of performance (COP) for refrigeration or heat pump system is one of the critical parameters for designing an air conditioning system. The modeling of the system components for a VRF cycle under different cooling conditions using R-134a and R-22 as refrigerants was carried out. Calculations were performed by varying different parameters such as condenser and evaporator temperatures, a

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24

Fantenberg, Elina. "Estimation of Air Mass Flow in Engines with Variable Valve Timing." Thesis, Linköpings universitet, Reglerteknik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-152290.

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To control the combustion in an engine, an accurate estimation of the air mass flow is required. Due to strict emission legislation and high demands on fuel consumption from customers, a technology called variable valve timing is investigated. This technology controls the amount of air inducted to the engine cylinder and the amount of gases pushed out of the cylinder, via the inlet and exhaust valves. The air mass flow is usually estimated by large look-up tables but when introducing variable valve timing, the air mass flow also depends on the angles of the inlet and exhaust valves causing the

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25

葉啓明 and Kai-ming Ip. "Dynamic response of a cooling and dehumidifying coil to variations in air flow rate." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1997. http://hub.hku.hk/bib/B31215361.

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26

Harson, Andrew. "A blade angle control system for large variable pitch fans." Thesis, Queen's University Belfast, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.334529.

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27

Zhang, Hao. "HEAT PUMP AND AIR CONDITIONING SYSTEM ANALYSIS BASED ON VARIABLE SPEED COMPRESSOR." Master's thesis, Temple University Libraries, 2010. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/97265.

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Mechanical Engineering<br>M.S.E.<br>Experiments were carried out to investigate the effect of ambient air temperatures on the heat pump performance using a variable speed compressor. Ambient air temperatures were varied from 40 to 60 °F to simulate different seasons. The compressor frequencies of 45 Hz, 50 Hz, 55 Hz, and 60 Hz were studied to determine the optimal frequency under various heating loads. The investigation was carried out by showing the compressor power input, heating output, and coefficient of performance for each case. Thermal cycle analysis along with the heat exchanger theory

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28

Tsang, Ho-on Frederick, and 曾可安. "Time variable parameter estimation on the wind speed air quality modelin Hong Kong." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1995. http://hub.hku.hk/bib/B31253283.

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29

Furr, James C. Jr. "Development of models for series and parallel fan variable air volume terminal units." Texas A&M University, 2003. http://hdl.handle.net/1969.1/6008.

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Empirical models of airflow output and power consumption were developed for series and parallel fan powered variable air volume terminal units at typical design pressure conditions. A testing procedure and experimental setup were developed to test sets of terminal units from three different manufacturers. Each set consisted of two series and two parallel units, each with 8 in. (203 mm) and 12 in. (304 mm) primary air inlets, for a total of four units in each set. Generalized models were developed for the series and parallel units, with coefficients varying by size and manufacturer. Statistical

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30

Zheng, Guo Rong. "Dynamic modeling and global optimal operation of multizone variable air volume HVAC systems." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq25927.pdf.

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31

Hill, John Michael. "Simulation of a variable speed air conditioner as a multiple loop thermal system." Diss., Georgia Institute of Technology, 1991. http://hdl.handle.net/1853/16754.

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32

Ip, Kenneth C. W. "Dynamic modular simulation of variable water and air volume flow systems in buildings." Thesis, University of Bristol, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.251526.

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33

Drabo, Alassane. "Health, environment and economic development." Thesis, Clermont-Ferrand 1, 2011. http://www.theses.fr/2011CLF10376/document.

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Cette thèse étudie théoriquement et empiriquement les interrelations entre la santé de la population, la dégradation de l'environnement et le développement économique, ses conséquences pour les pays en développement, et fournit certaines réponses en termes de politique économique. Elle est subdivisée en deux parties. La première partie s’intéresse à la relation entre l’environnement, la santé, et les inégalités. Elle analyse dans un premier temps l’hypothèse selon laquelle la dégradation de l'environnement pourrait être considérée comme un canal supplémentaire par lequel les inégalités de reve

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34

Psanis, Christodoulos. "Modelling and experimentation on air hybrid engine concepts for automotive applications." Thesis, Brunel University, 2007. http://bura.brunel.ac.uk/handle/2438/3218.

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Hybrid powertrains that use compressed air to help power a vehicle could dramatically improve the fuel economy, particularly in cities and urban areas where the traffic conditions involve a lot of starts and stops. In such conditions, a large amount of fuel is needed to accelerate the vehicle, and much of this is converted to heat in brake friction during decelerations. Capturing, storing and reusing this braking energy to produce additional power can therefore improve fuel efficiency. In this study, three approaches towards air hybrid powertrains are proposed and analyzed. In the first approa

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35

Peng, Sheng. "Characterizing air-water interfacial area in variably saturated sandy porous media." Diss., The University of Arizona, 2004. http://hdl.handle.net/10150/280732.

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Air-water interface plays an important role in the transport of many contaminants in the vadose zone. It is also a limiting factor for many processes involve mass or energy transfer between air and water phases in vadose zone. In this research, the gas-phase partitioning tracer method was used to measure air-water interfacial area for eight porous media. The experimental results were used to investigate the influencing factors of the magnitude of air-water interfacial area and the relationship between the air-water interfacial area and water saturation, and capillary pressure. The porous media

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36

Flach-Malaspina, Nicolas. "Conception globale d'une pompe à chaleur air / eau à puissance variable pour le secteur résidentiel." Phd thesis, Paris, ENMP, 2004. http://www.theses.fr/2004ENMP1227.

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37

Nathwani, Ashak. "Comparative Analysis of Air Conditioning Systems in Commercial Office Buildings: Cost, Energy and Comfort." Thesis, The University of Sydney, 2022. https://hdl.handle.net/2123/28831.

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Heating Ventilation & Air Conditioning (HVAC) systems prevalent in Australian office buildings are Variable Air Volume (VAV), Under Floor Air Distribution (UFAD) and Chilled Beams (CB). This study compared these systems with respect to cost, energy, and comfort. Using an A-B comparison research design, structured feedback was provided on comfort vectors and system preferences by a randomised sample of 30 human subjects recruited from the industry. The findings showed thermal comfort preferences for CB as being 62% versus 38% for VAV and UFAD. Logistic Regression analysis, like the approach ta

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38

Maisonnave, Océane. "Contrôle et optimisation énergétique d’une chaîne multimachines multi-pompes à vitesse variable pour le stockage d’énergie par air comprimé." Thesis, Nantes, 2019. http://www.theses.fr/2019NANT4070.

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Dans le cadre du développement d’un système de stockage par air comprimé, la présente étude porte sur le contrôle et l’optimisation énergétique d’une chaîne réversible multi-machines et multi-pompes en vue de la maximisation du rendement. Le système de pompage est identifié comme l’élément du système le plus influant vis-à-vis des performances. Une structure de contrôle-commande à vitesse variable est proposée et permet de contraindre son fonctionnement en régime dynamique à ses points de meilleure efficacité (BEP). Les lois de commandes soumettent la conversion électromécanique à un fonctionn

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39

Richard, Gaetan C., and Daniel G. Gonzales. "A NEW VARIABLE BEAMWIDTH ANTENNA FOR TELEMETRY TRACKING SYSTEMS." International Foundation for Telemetering, 1995. http://hdl.handle.net/10150/608402.

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International Telemetering Conference Proceedings / October 30-November 02, 1995 / Riviera Hotel, Las Vegas, Nevada<br>This paper presents a new variable beamwidth antenna designed for use in telemetry tracking systems when a high gain/low gain antenna configuration is required. This antenna can be commanded to continuously vary its beamwidth between a high gain/narrow beamwidth mode of operation and a low gain/ wide beamwidth mode of operation. A design goal of a 4:1 increase in beamwidth has been set and a 3.0:1 increase has been achieved without causing any significant degradation in t

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Blum, David H. (David Henry). "Analysis and characterization of ancillary service demand response strategies for variable air volume HVAC systems." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/82162.

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Thesis (S.M. in Building Technology)--Massachusetts Institute of Technology, Dept. of Architecture, 2013.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Cataloged from student-submitted PDF version of thesis.<br>Includes bibliographical references (p. 113-119).<br>Output variability and prediction difficulties with respect to solar and wind electricity resources increase the requirement of grid-scale reserve capacity and add strain to existing firm generators used for reserves and other an

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Qureshi, Tauqir Qadir. "Investigation of the performance of alternative compressor technologies in variable speed refrigeration systems for air conditioning applications." Thesis, Brunel University, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.385281.

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42

Protheroe, Michael. "Simulation of variable fluid-properties plate heat exchanger for educational purposes thesis submitted in partial fulfilment of the Masters degree in Engineering, Auckland University of Technology, October 2003." Full thesis. Abstract, 2003. http://puka2.aut.ac.nz/ait/theses/ProtheroeM.pdf.

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43

Johnson, Kyle Jacob. "AXISYMMETRIC AIR AUGMENTED METHANOL/GOX ROCKET MIXING DUCT EXPERIMENTAL THRUST STUDY." DigitalCommons@CalPoly, 2013. https://digitalcommons.calpoly.edu/theses/930.

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A hot-flow axisymmetric Air Augmented Rocket (AAR) test apparatus was constructed to test various mixing duct configurations at static conditions. Primary flow for the AAR was provided through a liquid methanol-gaseous oxygen bipropellant rocket. Experimental thrust measurements were recorded and propellant mass flow rates and chamber conditions were calculated using an iterative solver dependant on recorded propellant line stagnation pressures. Primary rocket flow produced thrust ranging from 14 to 17.9lbf. Primary mass flow rate through testing ranged from 0.071 to 0.085lbm/s with calculated

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44

Bagnoli, Joseph P. Jr. "Merit Aid as a Predictor Variable of Undergraduate Student Enrollment." UKnowledge, 2016. http://uknowledge.uky.edu/epe_etds/41.

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Merit-based financial aid has long been utilized by college and university enrollment managers to attract the most academically qualified applicants for admission. Considerable research has been done to illustrate the impact of state-based merit aid programs and other scholarly pursuits have drawn attention to the consequences of merit aid on institutional investments in need-based aid. Less is known about the efficacy of merit aid to achieve college student enrollment objectives. The purpose of this study was to evaluate the relationship between merit aid values and the likelihood of undergra

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45

Jang, Wonyong. "Unsteady multiphase flow modeling of IN-SITU air sparging system in a variable saturated subsurface environment." Available online, Georgia Institute of Technology, 2005, 2005. http://etd.gatech.edu/theses/available/etd-11172005-140745/.

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Thesis (Ph. D.)--Civil and Environmental Engineering, Georgia Institute of Technology, 2006.<br>Dr. Spyros Pavlostathis, Committee Member ; Dr. Mustafa M. Aral, Committee Chair ; Dr. Turgay Uzer, Committee Member ; Dr. Ching-Hua Huang, Committee Member ; Dr. Sotira Yiacoumi, Committee Member. Vita. Includes bibliographical references.

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46

Bouaniche, Alexandre. "A hybrid stochastic-sectional method for the simulation of soot particle size distributions Vitiated high karlovitz n-decane/air turbulent flames: scaling laws and micro-mixing modeling analysis A hybrid stochastic/fixed-sectional method for solving the population balance equation." Thesis, Normandie, 2019. http://www.theses.fr/2019NORMIR23.

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Les particules de suie (qui sont un type de particules ultrafines) peuvent être produites et émises dans des conditions de combustion riche. Les secteurs comme les transports (routier et aérien), où l'industrie sont des contributeurs significatifs aux émissions de particules. Celles-ci sont habituellement considérées comme des polluants dans la mesure où leur impact négatif sur la santé a été mesuré. Dans certains cas spécifiques comme la production de nanomatériaux, elles peuvent être synthétisées de manière volontaire. Dans les deux cas, une compréhension précise et une capabilité de prédict

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47

Yun, Hayong. "The design and control strategies for automotive air conditioning systems using motor driven, variable speed centrifugal compressors." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/11099.

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48

Kaya, Tarik. "Étude expérimentale et numérique du fonctionnement d'une soufflante à calage variable en présence d'une distorsion de pression totale en entrée." Toulouse, ENSAE, 1993. http://www.theses.fr/1993ESAE0023.

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Abstract:

L’écoulement dans un fan à calage variable a été étudié avec une distorsion de pression totale imposée en entrée. L’étude comporte deux parties principales. Dans la première partie, l'écoulement dans le fan a été étudié en alimentation homogène. Les essais stationnaires ont fourni un ensemble de données pour un calcul numérique quasi-tridimensionnel. Une confrontation calcul-expérience a été réalisée. Les essais instationnaires effectués en utilisant une sonde a films chauds croisés ont permis de mesurer l'évolution du sillage au niveau de la roue mobile. Dans la deuxième partie, l'écoulement

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49

Rondon, Yepez Victor Rousel. "Comparación energética de un sistema de volumen variable de refrigerante vs sistemas centrales enfriados por agua." Bachelor's thesis, Universidad Nacional Mayor de San Marcos, 2014. https://hdl.handle.net/20.500.12672/12017.

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Abstract:

Señala que existen diversos tipos de sistemas de aire acondicionado centrales, tales como los sistemas de enfriado por agua, sistemas de volumen de refrigerante variable entre otros. Sin embargo, el manejo eficiente de la energía es una preocupación constante del empresariado, por lo que no cabe duda que el ahorro y el correcto uso de la energía eléctrica es un tema fundamental para cualquier empresa. El exceso de consumo de la misma no solo incurre en un pago adicional de la tarifa mensual sino también en la contaminación ambiental, desgaste del equipo o sistema, aumento de la frecuencia de m

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50

Correia, Carlos André Henriques Martins. "Strategic variables for National Air Transport." Master's thesis, 2010. http://hdl.handle.net/10071/3830.

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Abstract:

Air Transport allowed over time, to reduce distances, eliminate borders, increase mobility and contribute to a new model of society as we know today.These are some of the reasons why in recent years, there were times of growth, development and higher demand, strengthening its role in a society increasingly globalized. While environmental costs caused by air transport are often highlighted, very little is said about its benefits. Broadly speaking it can be said that aviation contributes to worldwide trade by opening access to several markets, for investment through internationalizat

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