Gotowe bibliografie tematyczne / Doppler spread / Rozprawy doktorskie
Kliknij ten link, aby zobaczyć inne rodzaje publikacji na ten temat: Doppler spread.

Rozprawy doktorskie na temat „Doppler spread”

Autor: Grafiati
Data publikacji: 4 czerwca 2021
Data aktualizacji: 25 lipca 2025

Utwórz poprawne odniesienie w stylach APA, MLA, Chicago, Harvard i wielu innych

Wybierz rodzaj źródła:

Sprawdź 47 najlepszych rozpraw doktorskich naukowych na temat „Doppler spread”.

Przycisk „Dodaj do bibliografii” jest dostępny obok każdej pracy w bibliografii. Użyj go – a my automatycznie utworzymy odniesienie bibliograficzne do wybranej pracy w stylu cytowania, którego potrzebujesz: APA, MLA, Harvard, Chicago, Vancouver itp.

Możesz również pobrać pełny tekst publikacji naukowej w formacie „.pdf” i przeczytać adnotację do pracy online, jeśli odpowiednie parametry są dostępne w metadanych.

Przeglądaj rozprawy doktorskie z różnych dziedzin i twórz odpowiednie bibliografie.

1

Eggen, Trym H. 1963. "Underwater acoustic communication over Doppler spread channels." Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/42768.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
2

Malachias, Nickolaos. "Doppler shift and spread study for ionospherically propagated signals." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1994. http://handle.dtic.mil/100.2/ADA284610.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
3

Wen, Hui. "Comparison and Evaluation of Doppler Spread Estimation Algorithms in WCDMA." Thesis, KTH, Kommunikationsteori, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-152226.

Pełny tekst źródła
Streszczenie:
In a WCDMA transmission systems, the properties of the radio transmissionchannels can be strongly aected by the movement of User Equipment (UE) orthe surrounding objects. The estimation of Doppler spread is therefore of greatimportance since it is closely related to the mobile speed, as it can also be usedto characterize the fast fading in the radio channel. Thus the Doppler spread estimation can have wide range of applications and the relative research on thistopic has drawn much attention. Many Doppler spread estimation algorithms has been proposed in the literature. In this report, these al
Style APA, Harvard, Vancouver, ISO itp.
4

Fofanah, Ibrahim, and Wannaw Assegu. "Delay Spread Characterization of the Aeronautical Channel." International Foundation for Telemetering, 2012. http://hdl.handle.net/10150/581653.

Pełny tekst źródła
Streszczenie:
ITC/USA 2012 Conference Proceedings / The Forty-Eighth Annual International Telemetering Conference and Technical Exhibition / October 22-25, 2012 / Town and Country Resort & Convention Center, San Diego, California<br>Radio transmission channel influences greatly the quality of transmitted voice and data signal in terms of data rate and robustness. This degradation is as a result of many factors, notable amongst them are having multiple replica of the transmitted signal at the receiver (multipath), changes of frequency as a result of the movement of the aircraft (Doppler shift) and noise. Thi
Style APA, Harvard, Vancouver, ISO itp.
5

Peng, Ziqi. "Performance and Complexity Comparison of Doppler Spread Estimation for WCDMA Systems." Thesis, KTH, Kommunikationsteori, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-152225.

Pełny tekst źródła
Streszczenie:
In cellular communication systems, the estimation of Doppler spread has a wide range of applications such as handoff, channel assignment scheme, adaptivetransmission, power control, etc. A great quantity of Doppler spread estimation algorithms have been proposed in the literature. But there has been few investigations which gives a comprehensive comparison of these algorithms. Therefore, it is of great signicance to compare and evaluate the performance of the existing algorithms in the same simulation framework. In this report, the uplink of WCDMA is considered. Four different types of Doppler
Style APA, Harvard, Vancouver, ISO itp.
6

Scaife, Bradley J. "DOPPLER SHIFTED SPREAD SPECTRUM CARRIER RECOVERY USING REAL-TIME DSP TECHNIQUES." International Foundation for Telemetering, 1998. http://hdl.handle.net/10150/607365.

Pełny tekst źródła
Streszczenie:
International Telemetering Conference Proceedings / October 26-29, 1998 / Town & Country Resort Hotel and Convention Center, San Diego, California<br>In any satellite communication, the Doppler shift associated with the satellite’s position and velocity must be calculated in order to determine the carrier frequency. If the satellite state vector is unknown then some estimate must be formed of the Doppler-shifted carrier frequency. One elementary technique is to examine the signal spectrum and base the estimate on the dominant spectral component. If, however, the carrier is spread (as in m
Style APA, Harvard, Vancouver, ISO itp.
7

Landon, David. "DOPPLER BANDWIDTH CHARACTERIZATION OF ARTM CHANNEL SOUNDING DATA." International Foundation for Telemetering, 1999. http://hdl.handle.net/10150/608760.

Pełny tekst źródła
Streszczenie:
International Telemetering Conference Proceedings / October 25-28, 1999 / Riviera Hotel and Convention Center, Las Vegas, Nevada<br>Data from ARTM channel sounding test flights is examined to characterize the dynamic channel behavior of aeronautical telemetry channels. The dynamic behavior is characterized using the Doppler power spectrum. The width of the Doppler power spectrum is the Doppler bandwidth of the channel which indicates the required bandwidth of adaptive detection techniques such as adaptive equalization, adaptive modulation, adaptive channel selection and adaptive error control
Style APA, Harvard, Vancouver, ISO itp.
8

Widodo, Slamet. "Wind and Doppler Shift Compensation for Spread Spectrum Sound-based Positioning System." Kyoto University, 2013. http://hdl.handle.net/2433/180518.

Pełny tekst źródła
Streszczenie:
Kyoto University (京都大学)<br>0048<br>新制・課程博士<br>博士(農学)<br>甲第17901号<br>農博第2024号<br>新制||農||1017(附属図書館)<br>学位論文||H25||N4797(農学部図書室)<br>30721<br>京都大学大学院農学研究科地域環境科学専攻<br>(主査)教授 近藤 直, 准教授 小川 雄一, 教授 飯田 訓久<br>学位規則第4条第1項該当
Style APA, Harvard, Vancouver, ISO itp.
9

Jian-zhong, Qi, Gong Yan, and Song Peng. "Realization of Fast Acquisition for Spread Spectrum Signal Based on FFT." International Foundation for Telemetering, 2011. http://hdl.handle.net/10150/595763.

Pełny tekst źródła
Streszczenie:
ITC/USA 2011 Conference Proceedings / The Forty-Seventh Annual International Telemetering Conference and Technical Exhibition / October 24-27, 2011 / Bally's Las Vegas, Las Vegas, Nevada<br>Acquisition based on Fast Fourier Transform (FFT) can acquire Pseudo-random code phase quickly and improve the performance of the satellite navigation receivers. In the paper Real-time receiver adopts the FPGA to realize the function of FFT and uses DSP processor to control the implementation process of Acquisition. For increasing the sensitivity of Acquisition incoherent accumulation were used in the proce
Style APA, Harvard, Vancouver, ISO itp.
10

Landon, David. "PARAMETRIC ESTIMATION OF THE SCATTERING FUNCTION FOR ARTM CHANNEL SOUNDING DATA." International Foundation for Telemetering, 2000. http://hdl.handle.net/10150/608249.

Pełny tekst źródła
Streszczenie:
International Telemetering Conference Proceedings / October 23-26, 2000 / Town & Country Hotel and Conference Center, San Diego, California<br>Parameterized data from ARTM channel sounding test flights are used to derive a parameter-based estimate of the scattering function. The Doppler bandwidth and Doppler spread, important measures of channel dynamics, can be estimated from such a scattering function. Data collected from ARTM Flight 11 suggest that the Doppler bandwidth is larger than 6.7 Hz. Even for very small collections of parameterized data, surprising agreement is shown to non-paramet
Style APA, Harvard, Vancouver, ISO itp.
11

Sanchez, Monica A. "Doppler Extraction for a Demand Assignment Multiple Access Service for NASA's Space Network." International Foundation for Telemetering, 1996. http://hdl.handle.net/10150/611433.

Pełny tekst źródła
Streszczenie:
International Telemetering Conference Proceedings / October 28-31, 1996 / Town and Country Hotel and Convention Center, San Diego, California<br>NASA's Space Network (SN) provides both single access (SA) and multiple access (MA) services through a pre-scheduling system. Currently, a user's spacecraft is incapable of receiving service unless prior scheduling occurred with the control center. NASA is interested in efficiently utilizing the time between scheduled services. Thus, a demand assignment multiple access (DAMA) service study was conducted to provide a solution. The DAMA service would al
Style APA, Harvard, Vancouver, ISO itp.
12

Huang, Zichen. "A Passive Spread Spectrum Sound-Based Local Positioning System for Robots in a Greenhouse." Kyoto University, 2020. http://hdl.handle.net/2433/259051.

Pełny tekst źródła
Streszczenie:
Kyoto University (京都大学)<br>0048<br>新制・課程博士<br>博士(農学)<br>甲第22783号<br>農博第2426号<br>新制||農||1081(附属図書館)<br>学位論文||R2||N5303(農学部図書室)<br>京都大学大学院農学研究科地域環境科学専攻<br>(主査)教授 近藤 直, 教授 飯田 訓久, 准教授 小川 雄一<br>学位規則第4条第1項該当
Style APA, Harvard, Vancouver, ISO itp.
13

Hassana, Ramesh Rakesh Kashyap. "Transform Domain Acquisition of Spread Spectrum Signals in a Low Signal to Noise Ratio Environment." Ohio University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1289579500.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
14

Fu, Ruijun. "Empirical RF Propagation Modeling of Human Body Motions for Activity Classification." Digital WPI, 2012. https://digitalcommons.wpi.edu/etd-theses/1130.

Pełny tekst źródła
Streszczenie:
"Many current and future medical devices are wearable, using the human body as a conduit for wireless communication, which implies that human body serves as a crucial part of the transmission medium in body area networks (BANs). Implantable medical devices such as Pacemaker and Cardiac Defibrillators are designed to provide patients with timely monitoring and treatment. Endoscopy capsules, pH Monitors and blood pressure sensors are used as clinical diagnostic tools to detect physiological abnormalities and replace traditional wired medical devices. Body-mounted sensors need to be investigated
Style APA, Harvard, Vancouver, ISO itp.
15

Bergadà, Caramés Pau. "Oblique Sounding and HF Communication Techniques for Very Long Haul Ionospheric Links." Doctoral thesis, Universitat Ramon Llull, 2015. http://hdl.handle.net/10803/285837.

Pełny tekst źródła
Streszczenie:
El sistema de comunicació ràdio d’alta freqüència (HF, en anglès) és usat arreu del món per agències governamentals i no governamentals sempre que calgui una alternativa a les comunicacions via satèl•lit: vaixells a alta mar, avions fora de cobertura de xarxes ràdio amb visió directa, operacions militars, zones on la infraestructura ha estat destruïda per algun tipus de desastre o bé zones llunyanes sense cap altre tipus de comunicació. La ràdio HF representa una alternativa, o un sistema de backup al satèl•lit per a comunicacions de llarg abast i en redueix els costos, evita la vulnerabilitat
Style APA, Harvard, Vancouver, ISO itp.
16

Gunaydin, Ezgi. "Implementation Of Software Gps Receiver." Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/2/12606305/index.pdf.

Pełny tekst źródła
Streszczenie:
A software GPS receiver is a functional GPS receiver in software. It has several advantages compared to its hardware counterparts. For instance, improvements in receiver architecture as well as GPS system structure can be easily adapted to it. Furthermore, interaction between nearby sensors can be coordinated easily. In this thesis, a SGR (software GPS receiver) is presented from a practical point of view. Major components of the SGR are implemented in Matlab environment. Furthermore, some alternative algorithms are implemented. SGR implementation is considered in two main sections namely a si
Style APA, Harvard, Vancouver, ISO itp.
17

FLOHRE, NICHOLAS MATTHEW. "EXPERIMENTAL INVESTIGATION OF SPRAY ATOMIZATION PROPERTIES OF AN AIRCRAFT ENGINE SWIRL CUP." University of Cincinnati / OhioLINK, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1054322000.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
18

Moreau, Florian. "Évaporation et dispersion d'un spray bi-composant dans un écoulement de canal chauffé fortement turbulent : une approche expérimentale." Thesis, Toulouse, INPT, 2010. http://www.theses.fr/2010INPT0087/document.

Pełny tekst źródła
Streszczenie:
Cette étude s'inscrit dans le cadre de la compréhension des phénomènes ayant lieu dans les chambres de combustion aéronautiques. Ces phénomènes étant multiples et complexes, des simplifications sont nécessaires. L'étude se focalise uniquement sur l'évaporation de gouttelettes bi-composant en écoulements turbulents. De nombreux modèles d'évaporation existent mais l'influence de la turbulence dans le cas d'un spray est encore mal comprise. Alors que la turbulence augmente l'évaporation d'une goutte isolée, elle peut amener à la création d'amas de gouttes qui vont au contraire ralentir l'évaporat
Style APA, Harvard, Vancouver, ISO itp.
19

Mühlbauer, Monika. "Modelling wall interactions of a high-pressure, hollow cone spray /." Aachen : Shaker, 2009. http://d-nb.info/998456616/04.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
20

Zaremba, Matouš. "Vliv provozních parametrů na kvalitu rozprašování kapalin u dvou-médiových trysek." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2013. http://www.nusl.cz/ntk/nusl-230587.

Pełny tekst źródła
Streszczenie:
This master’s thesis deals with measurement of spray characteristics of Effervescent atomizers intended for burning waste and heavy fuels. Atomizers were tested on cold test bench by means of Phase Doppler Anemometry. Spray characteristics were evaluated for many different regimes of pressure, temperature and Gas to liquid ratio. The aim of this measurement is to compare flow regimes and their influence on the quality of spray characteristics. The theoretical part describes basic fundamental principles of liquid atomization, effervescent atomization and principles of laser diagnostic methods.
Style APA, Harvard, Vancouver, ISO itp.
21

Aftel, Robert. "Effect of atomization gas properties on droplet atomization in an "air-assist" atomizer." Master's thesis, Virginia Tech, 1996. http://hdl.handle.net/10919/32599.

Pełny tekst źródła
Streszczenie:
<p>Air, nitrogen, argon and carbon dioxide were used as the atomizing gas in an 'air-assist' spray nozzle to determine the effect of these gases on mean droplet size, number density, velocity and their distributions in kerosene fuel spays and spray flames using a two dimensional phase Doppler interferometer. Data have been obtained with these atomizing gases using a base, air assisted case as a reference, since this is the most commonly used atomizing fluid in almost all applications. Comparisons were made between the gases on a mass and momentum flux basis. Both burning and nonburning sprays
Style APA, Harvard, Vancouver, ISO itp.
22

Fukumasu, Newton Kiyoshi. "Análise experimental da influência da frequência de injeção de combustível em chamas pulsadas de spray de etanol." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/3/3150/tde-26082015-104625/.

Pełny tekst źródła
Streszczenie:
E consenso que o crescente consumo de combustíveis fósseis na geração de potencia tem provocado uma maior degradação do meio ambiente. Para mitigar os efeitos adversos desse consumo, novas fontes e usos sustentáveis de energia são necessários. O uso de etanol na atual geração de motores de combustão interna demanda informações detalhadas sobre os processos de nebulização, evaporação, mistura e combustão das gotas desse combustível. Adicionalmente, novas estratégias de injeção de combustível em MCIs com injeção direta estão em desenvolvimento, como a injeção estraticada. Essa estratégia consist
Style APA, Harvard, Vancouver, ISO itp.
23

Boëdec, Thomas. "Caractérisation d'un spray dense et à grande vitesse par diagnostics optiques." Ecully, Ecole centrale de Lyon, 1999. http://bibli.ec-lyon.fr/exl-doc/TH_T1822_tboedec.pdf.

Pełny tekst źródła
Streszczenie:
Ce travail constitue une contribution à la caractérisation expérimentale d'un spray dense et à grande vitesse de type spray diesel, au moyen de diagnostics optiques, par des mesures ponctuelles - anémométrie phase doppler (PDA) - ou planes - vélocimétrie par images de particules (PIV) et traitement et analyse d'images (DIP) -. Un écoulement stationnaire est produit par décharge d'eau pressurisée à 10 MPa, à travers un orifice de diamètre 0,2 mm, débouchant dans le milieu ambiant. Grace à des mesures PDA, cinq critères définissant la transition d'un écoulement dense vers un écoulement pleinemen
Style APA, Harvard, Vancouver, ISO itp.
24

Shang, Lei, and lei shang@ieee org. "Modelling of Mobile Fading Channels with Fading Mitigation Techniques." RMIT University. Electrical and Computer Engineering, 2006. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20061222.113303.

Pełny tekst źródła
Streszczenie:
This thesis aims to contribute to the developments of wireless communication systems. The work generally consists of three parts: the first part is a discussion on general digital communication systems, the second part focuses on wireless channel modelling and fading mitigation techniques, and in the third part we discuss the possible application of advanced digital signal processing, especially time-frequency representation and blind source separation, to wireless communication systems. The first part considers general digital communication systems which will be incorporated i
Style APA, Harvard, Vancouver, ISO itp.
25

Friedman, Jacob A. "Investigating the interaction of an annular air jet with a spray flame using phase-Doppler interferometry and laser-induced fluorescence." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0006/NQ30609.pdf.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
26

Ďurdina, Lukáš. "Stanovení charakteristik spreje pomocí optických měřících metod." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2012. http://www.nusl.cz/ntk/nusl-230349.

Pełny tekst źródła
Streszczenie:
Diplomová práce se zabývá měřením charakteristik sprejů dvou tlakových vířivých trysek pro spalovací komoru malého turbínového motoru na zkušebním stavu za studena pomocí metod Particle Image Velocimetry (PIV) a fázové Dopplerovské anemometrie (PDA). Cílem měření bylo stanovit a porovnat charakteristiky sprejů obou trysek. Výsledky měření mají objasnit rozdílnost chování trysek za provozu a možný dopad na proces spalování. Úvodní teoretická část pojednává o základních fyzikálních principech atomizace kapalin, konstrukci a oblasti uplatnění tlakových vířivých trysek a o principech laserových di
Style APA, Harvard, Vancouver, ISO itp.
27

Malý, Milan. "Experimentální studie vlastností spreje a funkčnosti malých tlakových vířivých trysek." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-254386.

Pełny tekst źródła
Streszczenie:
Diplomová práce se zabývá experimentální studií vlastností spreje z několika malých tlakových vířivých trysek používaných ve spalovacích komorách proudových motorů. Po desetiletí byla snaha zlepšit jejich rozprašovací charakteristiky a stále jsou možnosti, které nebyly téměř prozkoumány. Výzkum byl proveden za použití různých geometrií jednotlivých dílů trysky za účelem zjištění jejich vlivu na sprej. Byl použit různý počet vstupních portů (2, 3 a 4), různé vířivé komůrky (kulová, kuželová, konvexní, nízká kuželová) a rozdílné návrhy obtokového otvoru (osové, mimosové). Důraz byl kladen na pos
Style APA, Harvard, Vancouver, ISO itp.
28

Delconte, Alain. "Fluorescence induite par laser multibande appliquée à la mesure de température dans les milieux complexes." Thesis, Vandoeuvre-les-Nancy, INPL, 2009. http://www.theses.fr/2009INPL062N/document.

Pełny tekst źródła
Streszczenie:
La fluorescence induite par laser multibande est une technique non intrusive permettant d’accéder à la température de la phase liquide dans des milieux complexes. L’application de cette technique dans des liquides monophasiques où le chemin optique est variable (produit de la concentration moléculaire du traceur et de la distance dans le milieu liquide entre le volume de mesure et l’optique de détection) a été considérée. Le rapport des intensités de fluorescence collectées sur deux bandes spectrales permet de s’affranchir de la concentration en traceur fluorescent, de l’intensité laser incide
Style APA, Harvard, Vancouver, ISO itp.
29

Delay, Guillaume Bazile Rudy Charnay Georges. "Analyse des écoulements transitoires dans les systèmes d'injection directe essence effets sur l'entraînement d'air instationnaire du spray /." Toulouse : INP Toulouse, 2006. http://ethesis.inp-toulouse.fr/archive/00000053.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
30

Torrent, Martí Xavier. "Advances on spray drift assessment in 3d crops." Doctoral thesis, Universitat de Lleida, 2020. http://hdl.handle.net/10803/673105.

Pełny tekst źródła
Streszczenie:
Els productes fitosanitaris són encara imprescindibles per combatre les plagues i malalties que afecten als cultius, i garantir així la producció d'aliments i altres matèries primeres vegetals. El principal efecte no desitjat, associat a l'ús de fitosanitaris, és la contaminació produïda per la deriva (quantitat de producte fitosanitari que es transportat més enllà dels límits de l’àrea tractada a través de corrents d’aire). Aquest fenomen es produeix per via aèria, afectant majoritàriament transeünts i residents locals, i també per sedimentació, contaminant cursos d’aigua, fauna, flora i altr
Style APA, Harvard, Vancouver, ISO itp.
31

Chishty, Wajid Ali. "Effects of Thermoacoustic Oscillations on Spray Combustion Dynamics with Implications for Lean Direct Injection Systems." Diss., Virginia Tech, 2005. http://hdl.handle.net/10919/28089.

Pełny tekst źródła
Streszczenie:
Thermoacoustic instabilities in modern high-performance, low-emission gas turbine engines are often observable as large amplitude pressure oscillations and can result in serious performance and structural degradations. These acoustic oscillations can cause oscillations in combustor through-flows and given the right phase conditions, can also drive unsteady heat release. This coupling has the potential to enhance the amplitude of pressure oscillations. To curb the potential harms caused by the existence of thermoacoustic instabilities, recent efforts have focused on the active suppression an
Style APA, Harvard, Vancouver, ISO itp.
32

Vince, Maxence. "Analyses in situ et approche paramétrique du procédé Spray Flash Evaporation pour l’élaboration d’hexolites." Electronic Thesis or Diss., Strasbourg, 2024. http://www.theses.fr/2024STRAE018.

Pełny tekst źródła
Streszczenie:
Les nanodiamants (NDs) font l'objet de recherches intenses dans les domaines biomédical, militaire et de la mécanique quantique. Pour produire ces NDs, le recours à la détonation d'un mélange RDX/TNT, aussi appelé hexolite, est souvent préféré. Cependant, pour produire des NDs aux propriétés physico-chimiques performantes, il est nécessaire d’avoir au préalable des particules fines d’hexolites, et des mélanges intimes et homogènes. Pour parvenir à cela, le laboratoire NS3E a développé le procédé de recristallisation par évaporation flash de spray (Spray Flash Evaporation, SFE). Cependant, l'in
Style APA, Harvard, Vancouver, ISO itp.
33

Delay, Guillaume. "Analyse des écoulements transitoires dans les systèmes d'injection directe essence : effets sur l'entraînement d'air instationnaire du spray." Phd thesis, Toulouse, INPT, 2005. http://oatao.univ-toulouse.fr/7367/1/delay1.pdf.

Pełny tekst źródła
Streszczenie:
L'objectif de cette étude est de déterminer l'effet des fluctuations de débit liquide instantané d'un injecteur sur l'entraînement d'air instationnaire d'un spray conique creux de type injection directe essence. Pour ce faire, nous utilisons plusi eurs outils, expérimentaux et numériques. Une méthode de mesure de débit liquide instantané, basée sur la modélisation physique des écoulements pulsés est utilisée. La mesure de la vitesse (Anémométrie Laser Doppler) de l'écoulement à l'axe de la conduite alimentant l'injecteur suffit pour reconstruire l'écoulement avant l'injecteur. Un logiciel de m
Style APA, Harvard, Vancouver, ISO itp.
34

Lojewski, Brandon. "A Linear Multiplexed Electrospray Thin Film Deposition System." Master's thesis, University of Central Florida, 2013. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5981.

Pełny tekst źródła
Streszczenie:
Liquid spray is essential to industries requiring processes such as spray coating, spray drying, spray pyrolysis, or spray cooling. This thesis reports the design, fabrication, and characterization of a thin film deposition system which utilizes a linear multiplexed electrospray (LINES) atomizer. First, a thorough review of the advantages and limitations of prior multiplexed electrospray systems leads to discussion of the design rationale for this work. Next, the line of charge model was extended to prescribe the operating conditions for the experiments and to estimate the spray profile. The s
Style APA, Harvard, Vancouver, ISO itp.
35

Milea, Andrei-Silviu. "Experimental investigation of innovative Low NOx / low soot injection systems for spinning combustiοn technology using advanced laser diagnostics". Electronic Thesis or Diss., Normandie, 2024. http://www.theses.fr/2024NORMIR43.

Pełny tekst źródła
Streszczenie:
Les effets anthropogéniques sur l’environnement posent un défi majeur pour l’industrie aéronautique. Des réglementations de plus en plus strictes et la nécessité de rendre le transport aérien durable orientent les recherches actuelles vers des systèmes propulsifs innovants. Dans ce contexte, Safran Helicopter Engines développe sa technologie brevetée de combustion giratoire (SCT), visant à améliorer les performances des moteurs d’hélicoptères. Déjà implémentée sur le moteur Arrano, cette technologie est davantage optimisée pour réduire significativement les émissions de NOx et de suies. Dans l
Style APA, Harvard, Vancouver, ISO itp.
36

Zhang, Hong. "Doppler spread estimation in mobile fading channels." Thesis, 2007. http://library1.njit.edu/etd/fromwebvoyage.cfm?id=njit-etd2007-031.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
37

Tsai, Chia-Hung, and 蔡嘉鴻. "Low-complexity ML Doppler Spread Estimation for OFDM Systems." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/91485105639865188737.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
38

Targi, Ali Hassan M. "Doppler effects and coding performance of hybrid spread spectrum systems." Thesis, 1990. http://spectrum.library.concordia.ca/3059/1/ML56097.pdf.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
39

Lee, William Weiham. "Radar Space-Time Processing for Range-Folded Spread-Doppler Clutter Mitigation." Diss., 2011. http://hdl.handle.net/10161/4976.

Pełny tekst źródła
Streszczenie:
<p>Pulsed radars have an ambiguous relationship between range and velocity which is proportional to the pulse repetition frequency (PRF), leading to potential tradeoffs. High PRFs are necessary to avoid velocity aliasing but suffer at the expense of unambiguous range. Obscuration due to ambiguous range foldover from distant clutter echos seriously degrades target detectability. For the case of skywave HF over-the-horizon (OTH) radar, ionospheric motion causes spreading of surface clutter in Doppler space and coupled with range folded clutter, introduces the effect of so-called 'separated'
Style APA, Harvard, Vancouver, ISO itp.
40

Huang, Chun-I., and 黃俊溢. "Doppler Spread and Line-of-sight Component Estimation in Rician Fading Channels." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/31795079026047502923.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
41

陳彥齊. "EM-Based Algorithm for Joint Channel and Doppler Spread Estimation over Doubly-Selective Fading Channels." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/56706357504467008378.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
42

Chang, Ming-Jou, and 張明洲. "Pseudo-Noise Code Synchronization of Direct Sequence Spread Spectrum Systems under Doppler shift and/or Multiple Fading." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/92938304440946417812.

Pełny tekst źródła
Streszczenie:
博士<br>國立中正大學<br>電機工程研究所<br>88<br>Four issues and solutions are investigated in the thesis with regard to the pseudo-noise (PN) code synchronization for single- and multi-carrier direct sequence spread spectrum (DS-SS) systems operating on additive white Gaussian noise (AWGN) and/or multipath fading channels. In the first part, code tracking with code-Doppler compensation for single carrier DS-SS systems on AWGN channels is proposed. Code Doppler compensation is introduced to the traditional noncoherent digital delay lock loop (DLL) in addition to carrier D
Style APA, Harvard, Vancouver, ISO itp.
43

Yen, Nan-Yang, and 顏楠源. "PN Synchronization Performance Analysis of Direct-Sequence Spread-Spectrum Communication System in the Presence of Doppler Shift." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/47587343241026882128.

Pełny tekst źródła
Streszczenie:
博士<br>國立成功大學<br>電機工程學系研究所<br>85<br>The use of direct-sequence spread-spectrum (DS-SS) in communication systems is considered a promising technique to obtain higher bandwidth efficiency and power efficiency, in addition to its well-knownmerits in the field of secure communications. However, the efficiency of a spread-spectrum system is highly dependent on the capability of the receiver to obtain accurate and fast synchronization between the received and the lo
Style APA, Harvard, Vancouver, ISO itp.
44

Zhang, Yihai. "Intercarrier interference reduction and channel estimation in OFDM systems." Thesis, 2011. http://hdl.handle.net/1828/3462.

Pełny tekst źródła
Streszczenie:
With the increasing demand for more wireless multimedia applications, it is desired to design a wireless system with higher data rate. Furthermore, the frequency spectrum has become a limited and valuable resource, making it necessary to utilize the available spectrum efficiently and coexist with other wireless systems. Orthogonal frequency division multiplexing (OFDM) modulation is widely used in communication systems to meet the demand for ever increasing data rates. The major advantage of OFDM over single-carrier transmission is its ability to deal with severe channel conditions w
Style APA, Harvard, Vancouver, ISO itp.
45

Roudini, Mehrzad. "Experimental investigation of spray characteristics of prefilming airblast atomizers." 2019. https://monarch.qucosa.de/id/qucosa%3A37723.

Pełny tekst źródła
Streszczenie:
Für technische Zerstäubungsprozesse wird häufig eine Flüssigkeitsmenge durch die kinetische Energie eines Hochgeschwindigkeitsgases in einem Luftstromzerstäuber in Einzeltropfen dispergiert. In einem Prefilming-Luftstromzerstäuber befindet sich die zu zerstäubende Flüssigkeit zuerst auf einer Oberfläche (Prefilming-Oberfläche) um einen dünnen Flüssigkeitsfilm zu bilden, bevor sie einem Hochgeschwindigkeitsluftstrom ausgesetzt wird. Das erste Ziel dieser Untersuchungen ist, den Zerstäubungsmechanismus der Prefilming-Zerstäuber zu verstehen und den Effekt variierender Parameter des Sprühsystems
Style APA, Harvard, Vancouver, ISO itp.
46

Doudou, Abdelkader. "ETUDE MACRO/MICROSCOPIQUE DES SPRAYS DIESEL INJECTES PAR LE SYSTEME COMMON RAIL AVEC LA TECHNIQUE D'OMBROSCOPIE ET L'ANÉMOMÈTRE PHASE DOPPLER." Phd thesis, 2007. http://tel.archives-ouvertes.fr/tel-00629877.

Pełny tekst źródła
Streszczenie:
Le présent travail a pour objet, l'étude macro et microscopique des sprays diesel injectés à hautes pressions par le système d'injection Common-Rail à travers un injecteur mono trou de petit diamètre dans un environnement inerte isotherme, évitant l'évaporation du combustible à pression de gaz élevée. L'étude effectuée est une contribution aux recherches, menées sur les sprays diesel complètement atomisés dès la sortie de l'injecteur, et présente une base de données solide pouvant servir entre autres à la validation des codes de calcul de simulation (computational fluid dynamics: CFD). Deux te
Style APA, Harvard, Vancouver, ISO itp.
47

Saikesava, Govindu. "Multi-connectivity for Urllc and Coexistence with Embb in Time-varying and Fading Channels." Thesis, 2022. https://etd.iisc.ac.in/handle/2005/5919.

Pełny tekst źródła
Streszczenie:
Ultra-reliable and low latency communications (URLLC) is a novel use case of 5G. It has challenging requirements like such as low block error rates (BLERs) and stringent latency targets. Multi-connectivity, in which multiple base stations (BSs) transmit the same data to the user, is a key technique in 5G to meet the stringent reliability requirements. URLLC data is immediately transmitted by puncturing the ongoing enhanced mobile broadband (eMBB) transmission to satisfy the latency constraint. However, this results in an increase in the BLER of the eMBB users. We first propose a low complex
Style APA, Harvard, Vancouver, ISO itp.
Możesz być także zainteresowany bibliografiami na temat „Doppler spread” dla innych typów źródeł:
Artykuły w czasopismach
Oferujemy zniżki na wszystkie plany premium dla autorów, których prace zostały uwzględnione w tematycznych zestawieniach literatury. Skontaktuj się z nami, aby uzyskać unikalny kod promocyjny!

Do bibliografii