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Effects of heating, breathing, hair style, posture, and air velocity on breathing zone concentrations for an anthropometrically-correct manikin in a wind tunnelEl-Nahas, Waleed Mahmoud. January 2005 (has links)
Thesis (Ph. D.)--West Virginia University, 2005. / Title from document title page. Document formatted into pages; contains xiv, 256 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 118-122).
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High order Parzen windows and randomized sampling /Zhou, Xiangjun. January 2009 (has links) (PDF)
Thesis (Ph.D.)--City University of Hong Kong, 2009. / "Submitted to Department of Mathematics in partial fulfillment of the requirements for the degree of Doctor of Philosophy." Includes bibliographical references (leaves [57]-62)
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Judgement post-stratification for designed experimentsDu, Juan, January 2006 (has links)
Thesis (Ph. D.)--Ohio State University, 2006. / Title from first page of PDF file. Includes bibliographical references (p. 143-146).
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The selection, integration, and evaluation of a payload for chemical plume detection on an autonomous underwater vehicle /Pennell, Vanessa, January 2003 (has links)
Thesis (M.Eng.)--Memorial University of Newfoundland, 2003. / The CD-ROM contains Appendix D: mass spectrometer data. Bibliography: leaves 94-97.
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A comparison of some estimators in forest sampling /Ek, Alan R. January 1969 (has links)
Thesis (Ph. D.)--Oregon State University, 1969. / Includes bibliographical references (p. 62-68). Also available on the World Wide Web.
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Analysis of Perceptron-Based Active LearningDasgupta, Sanjoy, Kalai, Adam Tauman, Monteleoni, Claire 17 November 2005 (has links)
We start by showing that in an active learning setting, the Perceptron algorithm needs $\Omega(\frac{1}{\epsilon^2})$ labels to learn linear separators within generalization error $\epsilon$. We then present a simple selective sampling algorithm for this problem, which combines a modification of the perceptron update with an adaptive filtering rule for deciding which points to query. For data distributed uniformly over the unit sphere, we show that our algorithm reaches generalization error $\epsilon$ after asking for just $\tilde{O}(d \log \frac{1}{\epsilon})$ labels. This exponential improvement over the usual sample complexity of supervised learning has previously been demonstrated only for the computationally more complex query-by-committee algorithm.
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Το φίλτρο Kalman σε ανομοιόμορφη δειγματοληψίαΤριανταφύλλου, Θωμαΐα 21 October 2011 (has links)
Σε αυτήν την διπλωματική εργασία ασχολούμαστε με το φίλτρο Kalman σε ανομοιόμορφη δειγματοληψία. Τα προαναφερθέντα αντικείμενα της εργασίας είτε χρησιμοποιούνται ξεχωριστά το ένα από το άλλο είτε εάν συνδυάζονται αποτελούν πάρα πολύ σημαντικά εργαλεία για κάθε επιστήμη και τεχνολογία.
Το φίλτρο Kalman χρησιμοποιείται με μεγάλη επιτυχία για εκτίμηση και ανάλυση δυναμικών συστημάτων. Οι εφαρμογές του καλύπτουν πολλά πεδία όπως την μηχανική, την επιστήμη των υλικών, τα οικονομικά, ακόμα και την ιατρική.
Από την άλλη, η χρήση της ανομοιόμορφης δειγματοληψίας, δηλαδή η δειγματοληψία σημάτων σε ανομοιόμορφα χρονικά διαστήματα αυξάνει συνεχώς και διαθέτει πάρα πολλά πλεονεκτήματα.
Σκοπός της διπλωματικής είναι η μελέτη και η ανάλυση αυτών των δύο στοιχείων και η εξαγωγή συμπερασμάτων όσον αφορά τον καλύτερο δυνατό αλγόριθμο επεξεργασίας σήματος. Έτσι στο 1ο Κεφάλαιο ασχολούμαστε με την γενικότερη έννοια της δειγματοληψίας, αλλά αναλύουμε και την ανομοιόμορφη. Στο 2ο Κεφάλαιο κάνουμε μια αρχική εισαγωγή για το πώς συνεργάζονται τα φίλτρα με την δειγματοληψία. Έπειτα, στο 3ο Κεφάλαιο αναφέρουμε λεπτομερειακά τις θεωρητικές και υπολογιστικές έννοιες γύρω από το φίλτρο Kalman. Το 4ο Κεφάλαιο περιλαμβάνει την υλοποίηση αλγορίθμων φίλτρου Kalman με ομοιόμορφη και ανομοιόμορφη δειγματοληψία. Στη συνέχεια, στο 5ο Κεφάλαιο παραθέτουμε την σύγκριση των αλγορίθμων και το συμπέρασμα για το οποιός είναι ο αποτελεσματικότερος και αναφέρουμε κάποιες εφαρμογές. Τέλος, το 6ο Κεφάλαιο εμφανίζεται το παράρτημα των κωδίκων που χρησιμοποιήθηκαν και στο 7ο Κεφάλαιο παραθέτουμε τις πηγές που αναλύσαμε. / In this thesis we deal with the Kalman filter to irregular sampling. The above subjects of the essay either they are used separately from one another or they are combined, they are very important tools for any science and technology.
The Kalman filter is used with great success for observing and analyzing each dynamic system. Its applications cover several fields such as engineering, materials science, economics, and even medicine.
On the other hand, the use of non-uniform sampling, which is the procedure of sampling some signals at uneven intervals, is growing continuously and has many advantages.
The aim of this essay is the study and analysis of both subjects and the export of conclusions about the best possible signal processing algorithm. So in the first chapter we deal with the general concept of sampling, but we analyze the irregular too. In the second chapter we make an initial introduction to how the filters cooperate with the sampling. Then, in the third chapter we report in detail the theoretical and computational concepts around the filter Kalman. The fourth chapter includes the implementation of Kalman filter algorithms with uniform and non-uniform sampling. Then, in Chapter 5 we present a comparison of algorithms and the conclusion on which is the most effective and we mention some applications. Finally, in the 6th chapter the Appendix of the codes is appeared and in the seventh chapter we cited the bibliograpfy we have analyzed.
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Μελέτη μεθόδων διαφορισμού και πολύπλεξης για ασύρματα δίκτυα επικοινωνιώνΝτούνη, Γεωργία 21 December 2012 (has links)
Αντικείμενο της παρούσας διπλωματικής εργασίας είναι η μελέτη μεθόδων διαφορισμού και πολύπλεξης που μπορούν να χρησιμοποιηθούν στα ασύρματα δίκτυα επικοινωνιών. Αρχικά, γίνεται μια ανασκόπηση της βασικής θεωρίας με τη ντετερμινιστική και στοχαστική μοντελοποίηση του ασύρματου τηλεπικοινωνιακού καναλιού. Αφού παρουσιάζονται οι βασικές τεχνικές διαμόρφωσης, ακολουθεί η σύγκριση του καναλιού Λευκού Προσθετικού Γκαουσιανού Θορύβου (AWGN) με το κανάλι επίπεδων διαλείψεων (flat fading) Rayleigh. Στη συνέχεια, μελετάται ο διαφορισμός στο χώρο με χρήση πολλαπλών κεραιών στον πομπό ή/και στο δέκτη και παρουσιάζονται βασικές τεχνικές μετάδοσης και ανίχνευσης. Ξεκινώντας από συστήματα SIMO και MISO με διαφορισμό μόνο στο δέκτη και στον πομπό, αντίστοιχα, καταλήγουμε στο σύστημα MIMO που εμφανίζει το μεγαλύτερο ενδιαφέρον. Τέλος, τα θεωρητικά αποτελέσματα που προκύπτουν επαληθεύονται με τη χρήση προσομοιώσεων, για τις οποίες εφαρμόζεται η τεχνική σημαίνουσας δειγματοληψίας (Importance Sampling). / The main goal of this diploma thesis is the study of diversity and multiplexing techniques which are employed in wireless communication systems. First of all, the deterministic and stochastic model of the wireless channel are introduced. After the presentation of the basic modulation techniques, the Additive White Gaussian Noise (AWGN) channel is compared with the Flat Fading Rayleigh channel. Space diversity aims at improving the performance of wireless systems in fading environments. More precisely, basic transmission and detection techniques are analyzed for systems with multiple antennas at the transmitter or/and the receiver. Beginning from SIMO and MISO systems the thesis concludes with the study of MIMO systems which are the most interesting. Finally, the theoretical results are confirmed with simulations developed with a fast simulation method called importance sampling.
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Robust sampling-based conflict resolution for commercial aircraft in airport environmentsVan den Aardweg, William 03 1900 (has links)
Thesis (MEng)--Stellenbosch University, 2015. / ENGLISH ABSTRACT: This thesis presents a robust, sampling-based path planning algorithm for commercial airliners that simultaneously
performs collision avoidance both with intruder aircraft and terrain. The existing resolution systems
implemented on commercial airliners are fast and reliable; however, they do possess certain limitations. This
thesis aims to propose an algorithm that is capable of rectifying some of these limitations. The development
and research required to derive this conflict resolution system is supplied in the document, including a
detailed literature study explaining the selection of the final algorithm. The proposed algorithm applies an
incremental sampling-based technique to determine a safe path quickly and reliably. The algorithm makes
use of a local planning method to ensure that the paths proposed by the system are indeed flyable. Additional
search optimisation techniques are implemented to reduce the computational complexity of the algorithm.
As the number of samples increases, the algorithm strives towards an optimal solution; thereby deriving a
safe, near-optimal path that avoids the predicted conflict region. The development and justification of the
different methods used to adapt the basic algorithm for the application as a confiict resolution system are
described in depth. The final system is simulated using a simplified aircraft model. The simulation results
show that the proposed algorithm is able to successfully resolve various conflict scenarios, including the generic
two aircraft scenario, terrain only scenario, a two aircraft with terrain scenario and a multiple aircraft
and terrain scenario. The developed algorithm is tested in cluttered dynamic environments to ensure that
it is capable of dealing with airport scenarios. A statistical analysis of the simulation results shows that the
algorithm finds an initial resolution path quickly and reliably, while utilising all additional computation time
to strive towards a near-optimal solution. / AFRIKAANSE OPSOMMING: Hierdie tesis bied 'n robuuste, monster-gebaseerde roetebeplanningsalgoritme vir kommersiële vliegtuie aan,
wat botsingvermyding met indringervliegtuie en met die terrein gelyktydig uitvoer. Die bestaande konflikvermyding-
stelsels wat op kommersiële vliegtuie geïmplementeer word, is vinnig en betroubaar; dit het egter
ook sekere tekortkominge. Hierdie tesis is daarop gemik om 'n algoritme voor te stel wat in staat is om
sommige van hierdie tekortkominge reg te stel. Die ontwikkeling en navorsing wat nodig was om hierdie
konflik-vermyding-algoritme af te lei, word in die dokument voorgelê, insluitende 'n gedetailleerde literatuurstudie
wat die keuse van die finale algoritme verduidelik. Die voorgestelde algoritme pas 'n inkrementele,
monster-gebaseerde tegniek toe om vinnig en betroubaar 'n veilige roete te bepaal. Die algoritme maak
gebruik van 'n lokale beplanningsmetode om te verseker dat die roetes wat die stelsel voorstel inderdaad
uitvoerbaar is. Aanvullende soektog-optimeringstegnieke word geïmplementeer om die berekeningskompleksiteit
van die algoritme te verlaag. Soos die aantal monsters toeneem, streef die algoritme na 'n optimale
oplossing; sodoende herlei dit na 'n veilige, byna-optimale roete wat die voorspelde konflikgebied vermy.
Die ontwikkeling en regverdiging van die verskillende metodes wat gebruik is om die basiese algoritme aan
te pas vir die toepassing daarvan as 'n konflik-vermyding-stelsels word in diepte beskryf. Die finale stelsel
word gesimuleer deur 'n vereenvoudigde vliegtuigmodel te gebruik. Die simulasie resultate dui daarop dat
die voorgestelde algoritme verskeie konflikscenario's suksesvol kan oplos, insluitend die generiese tweevliegtuigscenario,
die slegs-terreinscenario, die tweevliegtuig-met-terreinscenario en die veelvuldige vliegtuig-enterreinscenario.
Die ontwikkelde algoritme is in 'n beisge (cluttered), dinamiese omgewing getoets om te
verseker dat dit 'n besige lughawescenario kan hanteer. 'n Statistiese ontleding van die simulasie resultate
bewys dat die algoritme vinnig en betroubaar 'n aanvanklike oplossingspad kan vind, addisioneel word die
oorblywende berekeningstyd ook gebruik om na 'n byna optimaleoplossing te streef.
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EVALUATING SAMPLING STRATEGIES FOR RAINFALL SIMULATION STUDIES AND SURFACE TRANSPORT OF ANTIBIOTICS FROM SWINE MANURE APPLIED TO FESCUE PLOTSEnlow, Holly K 01 January 2014 (has links)
Antibiotics are commonly used in animal agriculture to treat and prevent diseases and promote growth. Unfortunately, large amounts of antibiotics are not metabolized, but instead are excreted in urine and feces. Rainfall simulation studies were used to investigate the transport of the antibiotic oxytetracycline and various constituents in runoff and the ability of alum to reduce pollutant transport. Runoff samples were collected at several points during the simulated storm event from each of four treatments: control (C), manure only (M), manure and antibiotics (MA), and manure, antibiotics and alum (MAA). Flow-weighted composite samples were created and compared to the flow weighted mean concentration (FWMC). Constituents with concentrations well-above the detection limits (E. coli, NH4-N, turbidity, TSS, TOC, and EC) showed a strong correlation between flow-weighted composite samples and FWMC. When constituent concentrations were at or near the detection limits, errors associated with the composite samples were magnified. Oxytetracycline concentrations had the strong correlation to E. coli, Cl, TOC, TSS, and turbidity suggesting that a BMP effective at trapping sediment or particulates may work best for reducing oxytetracycline concentrations in runoff. Alum (1%) did not reduce levels of oxytetracycline in runoff. It is recommended that higher doses of alum be tested.
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