Dissertations / Theses on the topic 'Measurement and Analysis'
To see the other types of publications on this topic, follow the link: Measurement and Analysis.
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 dissertations / theses for your research on the topic 'Measurement and Analysis.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.
1
Sadafal, Videsh. "Measurement and analysis of BitTorrent." Texas A&M University, 2008. http://hdl.handle.net/1969.1/86010.
Full textAbstract:
BitTorrent is assumed and predicted to be the world's largest Peer to Peer (P2P)
network. Previous studies of the protocol mainly focus on its file sharing algorithm,
and many relevant aspects of the protocol remain untouched. In the thesis, we conduct a number of experiments to explore those untouched aspects. We implement a
BitTorrent crawler to collect data from trackers and peers, and statistically analyze
it to understand the characteristics and behaviors of the BitTorrent protocol better.
We find that the expected lifetime of a peer in the BitTorrent is 56.6 minutes and
the activity is diurnal. Peers show strong preference towards a limited number of
torrents, and 10% of torrents are responsible for 67% of traffic. The US contributes
maximum number of peers to the BitTorrent and µTorrent emerges as the favorite
BitTorrent client. We measure the strength of Distributed Denial of Service (DDoS)
attack using BitTorrent network and conclude that it is transient and weak. Finally
we address and discuss the content locatability problem in BitTorrent and propose
two solutions.
2
Gamblin, Todd Reed Daniel A. "Scalable performance measurement and analysis." Chapel Hill, N.C. : University of North Carolina at Chapel Hill, 2009. http://dc.lib.unc.edu/u?/etd,2811.
Full textAbstract:
Thesis (Ph. D.)--University of North Carolina at Chapel Hill, 2009.Title from electronic title page (viewed Mar. 10, 2010). "... in partial fulfillment of the requirements for the degree of Doctor of Philosophy in the Department of Computer Science." Discipline: Computer Science; Department/School: Computer Science.
3
Armstrong, Christopher. "Inoculant measurement with thermal analysis." Thesis, KTH, Materialvetenskap, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-279066.
Full textAbstract:
Over time the level of inoculant will decrease due to fading and this needs to be compensated bymore additions of inoculant. When casting CGI400 at Scania a one-step method is used, and the inoculant additions are based on the last ladle from the previous oven. Longer stops in production will result in the previous oven not being representable and more inoculant should be added. A method to establish the inoculation level of the base iron in the oven would make it easier to control the process. This study was about inoculation measurements with the help of thermo- analysis of the melt in the oven to get a better understanding how it fluctuates between ovens and changes over time. The study is also about how to implement this tool into production in a foundry. With the help of thermo- analytic measurements, the inoculation level of the melt was established, and the method was also used to see how the level of inoculant changed over. To establish the inoculation additions needed, the saturation point of inoculant was investigated. The results from the study shows that the starting level of inoculant is too low in the melt it also shows that the inoculation level fluctuates over time. The conclusions that can be drawn from this study is that thermos analysis can be used in production to establish the inoculation level, but moremeasurements needs to be conducted to determine its accuracy.Över tid så minskar ympnivån i en smälta på grund av fading och detta måste kompenseras med mertillsatser av ymp. Vid gjutning av CGI400 på Scania används en en-stegs metod där man baserar ymptillsatsen i skänken på vad ympnivån var i sista skänken från den tidigare ugnen. Vid längre produktionsstopp kommer inte ympnivån från ugnen innan vara representativ utan mer ymp måste tillsättas. En metod för att bestämma ympnivån av basjärnet i ugnen skulle göra det lättare att styra processen. Denna studie handlar om ympmätning med hjälp av termisk analys i bas smälta för att få en bättre förståelse för hur den fluktuerar mellan ugnar och ändras över tid. Studien handlar också om hur man ska kunna applicera denna mätmetod i produktionen på ett gjuteri. Med hjälp av termo analytiska mätningar skulle grundnivån av ymp i smältan bestämmas och även för att se hur nivån ändrades över tiden. För att bestämma tillsatsen av ymp som borde tillföras undersöktes mättnadspunkten av ymp och hur den kunde tillsättas i skänk. Resultaten från studien visar att grundnivån av ymp är för låg och resultaten visar också att nivån av ymp fluktuerar både upp och ner ökar tid vilket inte var vad man hade förväntat sig och även det finns flera faktorer som kan påverka nivån. Slutsatsen som kan dras är att termisk analys kan användas i produktion för att bestämma ympnivån, men mer mätningar behövs för att bestämmadess noggrannhet.
4
Lo, Sau Yee. "Measurement error in logistic regression model /." View abstract or full-text, 2004. http://library.ust.hk/cgi/db/thesis.pl?MATH%202004%20LO.
Full textAbstract:
Thesis (M. Phil.)--Hong Kong University of Science and Technology, 2004.Includes bibliographical references (leaves 82-83). Also available in electronic version. Access restricted to campus users.
5
劉藹欣 and Oi-yan Elizabeth Lau. "Wrist pulse contour analysis." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2002. http://hub.hku.hk/bib/B35273525.
Full text
6
Qiu, Yihong. "Measurement and analysis of breath sounds." Thesis, University of Glasgow, 2003. http://theses.gla.ac.uk/1676/.
Full textAbstract:
Existing breath sound measurement systems and possible new methods have been critically investigated. The frequency response of each part of the measurement system has been studied. Emphasis has been placed on frequency response of acoustic sensors; especially, a method to study a diaphragm type air-coupler in contact use has been proposed. Two new methods of breath sounds measurement have been studied: laser Doppler vibrometer and mobile phones. It has been shown that these two methods can find applications in breath sounds measurement, however there are some restrictions. A reliable automatic wheeze detection algorithm based on auditory modelling has been developed. That is the human’s auditory system is modelled as a bank of band pass filters, in which the bandwidths are frequency dependent. Wheezes are treated as signals additive to normal breath sounds (masker). Thus wheeze is detectable when it is above the masking threshold. This new algorithm has been validated using simulated and real data. It is superior to previous algorithms, being more reliable to detect wheezes and less prone to mistakes. Simulation of cardiorespiratory sounds and wheeze audibility tests have been developed. Simulated breath sounds can be used as a training tool, as well as an evaluation method. These simulations have shown that, under certain circumstance, there are wheezes but they are inaudible. It is postulated that this could also happen in real measurements. It has been shown that simulated sounds with predefined characteristics can be used as an objective method to evaluate automatic algorithms. Finally, the efficiency and necessity of heart sounds reduction procedures has been investigated. Based on wavelet decomposition and selective synthesis, heart sounds can be reduced with a cost of unnatural breath sounds. Heart sound reduction is shown not to be necessary if a time-frequency representation is used, as heart sounds have a fixed pattern in the time-frequency plane.
7
Henry, R. "Measurement and analysis of pipe profiles." Thesis, Swansea University, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.637264.
Full textAbstract:
The repair cost for deteriorating sewers had led to the growing use of closed circuit television surveys to assess their condition. A more objective assessment of these sewers was required since information from these surveys was being used to allocate scarce resources. The useful information produced by TV surveys was increased by the adoption of the principle of an optical section. A special light-head was placed in front of a TV camera such that a ring of light was projected onto the pipe, perpendicular to the pipe's axis. The camera viewed this ring of light and any deformation in the pipe was reproduced by the light-ring. Using a microcomputer as the controller, a framestore digitised the video signal from the survey camera, and the picture information was downloaded into the computer memory. The initial research period was spent developing a reliable algorithm which could accurately identify the light-ring with the minimum number of errors. This was achieved by examining the digital map of the picture for specified gradients of light which generally only occurred at the light-ring. A mathematical representation of the profile coordinates was created using Fourier Desciptors. This model allowed diameter measurements to be extracted to an accuracy of 0.2% when using a solid state camera, and each profile could be stored in 100 bytes. This system was proved in field trials. It was shown by Cluster Analysis that the deformed shape of a pipe could be classified by the use of its Fourier Desciptors. It is expected that when a large enough database has been gathered the structural stability of a sewer may be automatically assessed from this mathematical representation of its profile.
8
Bay, Ibrahim. "Measurement and analysis of wave overtopping." Thesis, University of Liverpool, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.428241.
Full text
9
Gau, Jiahn-Rong J. "Microwave absorber analysis, design and measurement /." The Ohio State University, 1994. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487859313347128.
Full text
10
Hirst, William Mark. "Outcome measurement error in survival analysis." Thesis, University of Liverpool, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.366352.
Full text
11
Schmidt, Allen. "AFFTC RADIOMETRIC ANALYSIS AND MEASUREMENT SYSTEM." International Foundation for Telemetering, 1999. http://hdl.handle.net/10150/608437.
Full textAbstract:
International Telemetering Conference Proceedings / October 25-28, 1999 / Riviera Hotel and Convention Center, Las Vegas, NevadaA broad class of Electro-Optical (E-O) sensors are continually being improved and/or developed for aircraft to assist in performance of such tasks as surveillance, target acquisition, target designation, and weapons delivery. These E-O sensors possess a variety of Electro-Optical links that encompass the spectral region of 0.4 to 14 micrometers. The Radiometric Lab at Edwards Air Force base is tasked to provide instrumentation support for projects that develop, test, and evaluate ground and airborne E-O systems/sensors. The heart of the labs support capability is the Radiometric Analysis and Measurement System (RAMS) and is contained within an all-terrain van. A variety of sub-systems exist within the van to meet support requirements. These include an 8 to 12 micron infrared (IR) imaging system, 4 to 14 micron spectral radiometer, 380 to 1068 nanometer spectral radiometer, 400 to 1800 nanometer imaging camera, 1.064 nd:YAG laser, off-axis collimator with IR and visible light sources, and a weather station. This paper describes the system, its capabilities and limitations, and its application in aircraft sensor evaluation.
12
Dånmark, Anders. "Volume measurement of wood disks." Thesis, Uppsala universitet, Bildanalys och människa-datorinteraktion, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-212199.
Full textAbstract:
At the Department of Forest Products at Swedish University of Agricultural Sciences different metrics for wood are used. The volume of wood disks' is measured using archimedes principle.There are concerns of how accurate this measurement is and a different measuringsystem is wanted. This thesis has investigated the possibility of measuring the disks' volumes with imageanalysis. The recovery error should be less than 1% of the actual volume. In general, there are two methods for recovering an object using imageanalysis, active and passive methods. Compairing active and passive methods, active methods usually require simple algorithms but more expensive equipment compared to passive methods. Different methods for measuring objects' volumes have been evaluated and the choosen method was ``shape from silhouette''. Shape from silhouette is a passive method, only using the silhouette of anobject from multiple views to recover the objects volume. Passive methods have one drawback, they can only recover the visual hull of an object and the wood disks can be slightly concave. Due to the questionable accuracy of the current measurement method it was still deemed as possible to achieve at least equal performance. When the volume measuring algorithm was developed it was first tested in two simulations using on a sphere to determine its performance with different voxel sizes and different number of images. The algorithm performed well and an error of less than 1 % was achieved with a sphere. A third simulation was performed using a simulated wood disk, which is a much more complex object, and 5 % accuracy was achieved. Finally, an experiment on real images was performed. This experiment did, however, fail due to the low quality imaging setup. The conclusion of this thesis is that itis not possible to achieve less than 1 % accuracy of the recovered volume using the shape from silhouette technique.
13
WIRKIERMAN, ARIEL LUIS. "PRODUCTIVITY ANALYSIS FROM A CLASSICAL PERSPECTIVE: THEORY OF MEASUREMENT AND MEASUREMENT OF THEORY." Doctoral thesis, Università Cattolica del Sacro Cuore, 2012. http://hdl.handle.net/10280/1269.
Full textAbstract:
La presente tesi studia la nozione di produttività dal punto di vista Classico. In primo luogo, si connette la distinzione tra produttività (productivity) e profittabilità (productiveness) a quella tra il lato della spesa e quello del valore aggiunto dell'economia, vista come un flusso circolare. In secondo luogo, si collegano vari schemi teorici alle strutture empiriche del sistema di contabilità nazionale. Si calcolano quindi sia degli indicatori dei cambiamenti della produttività fisica, utilizzando come unità dell'analisi i subsistemi in crescita, che delle misure del grado di capacità delle singole industrie di generare sovrappiú. Si ottengono ed utilizzano regole di aggregazione e procedure di riduzione al fine di tenere correttamente conto dell'eterogeneità dei mezzi di produzione prodotti. In tutta la tesi, i risultati analitici ottenuti sono corredati da applicazioni empiriche. In larga misura, tale lavoro empirico concerne l'economia italiana (1999-2007); tuttavia, alcuni risultati riguardano un insieme di paesi industrializzati (Germania, Francia, Italia, Giappone, GB e USA) nel decennio 1995-2005.This is a study on the notion of productivity, viewed from a Classical perspective. First, the distinction between physical productivity and productiveness (i.e. profitability) is connected to the distinction between the expenditure side and value added side of the economy, seen as a circular flow. Second, a mapping of some theoretical frameworks into empirical structures of the System of National Accounts is advanced. Then, indicators of physical productivity changes with the (growing) subsystem as a unit of analysis are obtained, together with measures reflecting the degree of surplus generating capacity at the level of individual industries. Aggregation rules and reduction procedures are devised and applied to deal with the heterogeneous nature of produced means of production. All throughout the study, empirical applications of the analytical results are provided. For the most part, empirical work is referred to the case of Italy (1999-2007), though some results concern a set of advanced industrial economies (Germany, France, Italy, Japan, UK and the US) during the 1995-2005 decade.
14
Lohm, Isberg Maximilian, and David Olsson. "Analysis and performance measurement of construction logistics." Thesis, Linköpings universitet, Kommunikations- och transportsystem, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-95236.
Full textAbstract:
The construction industry is a business with an intense flow of both material and information that require well-functioning logistics in order to not suffer from unnecessarily high costs. Suppliers play a big part regarding the costs of the distribution and handling of material and due to this a construction project’s costs are affected a great deal by the suppliers’ actions. Spinnrocken is a construction project in the town center of Norrköping. The real estate company Fastighets AB L E Lundbergs is the client and the construction company Skanska is contracted as sole constructor for the project. Spinnrocken is planned to be finalized in the summer of 2014 and consists of several rental-apartments and some smaller businesses. Spinnrocken and its central location result in major logistic challenges, because of this Lundbergs and Skanska want to analyze and evaluate the project’s logistic performance. The main purpose of this thesis is to measure the order fulfillment of interior materials, the scaffold material Doka and windows at Spinnrocken by using the so-called perfect order fulfillment measure, as defined in Supply Chain Operations Reference Model. Perfect order fulfillment indicates the delivery performance to the construction site.The combined perfect order fulfillment for the three investigated materials is 18 %. A perfect order fulfillment of 18 % means that only one out of five inspected deliveries to Spinnrocken was considered having no faults at all. The effects of a low perfect order fulfillment are disruptions in the short-term time schedule, delayed operations, additional work and that the work space at the construction site is occupied by unnecessary construction material. The resulting effects thereby affects the project’s economy negatively.
15
Mirzaei, Majid. "On fatigue crack closure analysis and measurement." Thesis, McGill University, 1991. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=70339.
Full textAbstract:
This thesis describes a novel approach to the analysis of fatigue crack closure phenomena. Based on the proposed model, the combined effect of residual plastic stretch, asperity mismatch, and corrosion debris on the closure behavior of a fatigue crack can be simulated by a hypothetical rigid insert located in an ideal crack wake. Accordingly, the crack closing period can be modeled by a gradual contact between the ideal crack faces and the rigid insert.The formulation of the model results in a set of equations which can predict the closure load as well as the load-CMOD characteristics using the residual CMOD at zero load as a unique experimental input. Based on the initial model, the final form of the derived equations are either logarithmic or quadratic. While the latter can be solved directly for the closure load, the former requires a numerical solution.
The model qualitatively predicts the effect of gradual crack wake removal on the crack closure load level and the load-CMOD behavior. It also accounts for the response of a cracked component to an anomalous crack wake formed by single or block overloads.
The model is verified, both qualitatively and quantitatively, using specifically designed experimental techniques, a variety of specimen sizes, and two different alloys.
16
Palacín, Mateo Manuel. "The Internet ecosystem: a traffic measurement analysis." Doctoral thesis, Universitat Pompeu Fabra, 2015. http://hdl.handle.net/10803/326736.
Full textAbstract:
The analysis of the interconnection status-quo between content providers and Internet Service Providers (ISPs) is essential to understand the evolution of the Internet ecosystem. In the last years we have witnessed a spectacular increase of Internet traffic, especially multimedia content, which has driven both content providers and operators to rethink their interconnection models. This thesis performs an extensive traffic analysis from two perspectives to understand the rationale behind the Internet players. First, we analyse the traffic from the perspective of the evolution of the Internet protocols. Analyzing the protocols we pretend to observe whether the traffic pattern has changed while new applications have emerged and the demand have exploded. Second, we collect a dataset of Internet traces to evaluate the connectivity between access ISPs and the most popular content providers. Analyzing the Internet traces we want to identify the correlations in the interconnection models that different Internet players use.El análisis de las interconexiones entre proveedores de contenidos y operadores de Internet es esencial para entender la evolución del ecosistema de Internet. En los últimos años hemos sido testigos de un espectacular crecimiento del tráfico multimedia que ha llevado tanto a los proveedores de contenidos como a los operadores a replantearse sus modelos de interconexión. En esta tesis se realiza un análisis del tráfico de Internet des de dos perspectivas. Primero, se analiza el tráfico desde una perspectiva de los protocolos. Gracias al análisis de los protocolos se observa cómo ha cambiado el tráfico debido a la irrupción de nuevas aplicaciones y al incremento de la demanda de Internet. Segundo, se han realizado medidas que nos permite evaluar la conectividad entre diferentes operadores y proveedores de contenidos. El análisis de estos datos nos permite identificar correlaciones entre los diferentes modelos de interconexión que utilizan los operadores.
17
Talhouni, Bassam T. K. "Measurement and analysis of construction labour productivity." Thesis, University of Dundee, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.334262.
Full textAbstract:
An analytical approach for explaining the variability in labour intensive construction operations has been developed. A consistent method of collecting productivity developed jointly at the Pennsylvania State University and the University of Dundee has been refined and tested. Data has been collected daily from seven Scottish sites for continuous periods of up to 3 months. Not only productivity but many of the factors affecting it have been measured. A comprehensive, computerised database has been designed to facilitate data storage and manipulation. The quantification of the impact of each individual factor is based on the assumption that deviations from an operative?s normal output arise because of disturbances imposed by a multiplicity of site factors. The impact of each individual factor causes the average daily productivity to change.
18
Paffett, John. "VHF band interference measurement, analysis and avoidance." Thesis, University of Surrey, 2000. http://epubs.surrey.ac.uk/2105/.
Full text
19
Thomson, Louise. "Employee absence behaviour : measurement, analysis and antecedents." Thesis, University of Nottingham, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.326653.
Full text
20
Clay, G. A. "Automatic fibre length measurement by image analysis." Thesis, University of Manchester, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.305598.
Full text
21
Terry, Carol G. "Analysis and implementation of software reuse measurement." Master's thesis, This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-03302010-020346/.
Full text
22
Tabaka, Gregory A. "Analysis and measurement of candle flame shapes." College Park, Md.: University of Maryland, 2008. http://hdl.handle.net/1903/8230.
Full textAbstract:
Thesis (M.S.) -- University of Maryland, College Park, 2008.Thesis research directed by: Dept. of Fire Protection Engineering. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
23
Taylor, James Wagner. "Direct measurement and analysis of cyclohexadienyl oxidation." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/33716.
Full textAbstract:
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 2005.Includes bibliographical references (p. 173-182).
The oxidation of cyclohexadienyl radical (c-C₆H₇) and similar resonantly stabilized radicals are important in an astonishing array of processes in nature. Cyclohexadienyl radical has been postulated to be significant in a variety of processes that involve the atmospheric formation of benzene. In biology, there are specific enzymes that promote the formation of benzene-like intermediates from cyclohexadienyl radicals, called cyclohexadienyl dehydratases. In combustion processes, cyclohexadienyl radical is a possible link to the formation of soot and other large polyaromatic hydrocarbons (PAH's). Thus, the cyclohexadienyl radical moiety is important in many chemical processes, and its detailed study is of interest in many areas. In this work, cyclohexadienyl radical is studied both computationally and experimentally in the liquid and gas phases. The cyclohexadienyl radical is created using laser-flash photolysis. The UV absorption bands of the radical are probed and it's relative concentration over time measured in non-polar solvents in both the presence and absence of oxygen. Several analytical and numerical models of the chemistry were constructed to explain a puzzling discrepancy in the reported liquid and gas phase reaction rates.
(cont.) The models and data developed were then used in testing new software for finding the global optimum of dynamic systems. Optimized parameters for several key reaction pathways are reported, as well as a detailed description of the procedure. Finally, c-C₆H₇ was studied in the gas phase using an ultra-fast laser system. Preliminary results from those experiments are reported, as well as recommendations for future work.
by James Wagner Taylor.
Ph.D.
24
Joshi, Surabhi. "Measurement and analysis of damping in microresonators." Thesis, McGill University, 2013. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=116988.
Full textAbstract:
Microresonators are the central components of microelectromechanical systems (MEMS) used for sensing, imaging, signal processing and energy harvesting. For all these applications, it is necessary to control and minimize damping to improve device performance. However, the rational design of damping has been a long-standing challenge because numerous complicated mechanisms are responsible for energy dissipation in structures. Here, we focus our attention on microresonators that are characterized by low damping and linear damping. For such structures, damping can be modeled using three classical approaches – viscous dashpot; spring with complex-valued stiffness; and the three-parameter standard anelastic solid – and estimated using different dynamic and energetic measures (logarithmic decrement; quality factor; phase angle; specific damping capacity). A detailed study of the relationships between these models and measures establishes a foundation for this thesis, enables a close comparison of measurements using different techniques, and forms a link between theoretical calculations and measurements of damping. Subsequently, these relationships are used to develop a robust protocol for estimating damping by measuring thermomechanical noise in microresonators, and to derive formulas for estimating damping in layered beam and plate microresonators. The protocol is implemented and validated by measuring damping in single-crystal silicon microresonators.Les micro-résonateurs sont les composantes principales dans les systèmes micro-électro-mécaniques (MEMS). Ils sont utilisés pour l'imagerie, des capteurs et la récolte d'énergie. Pour toutes ces applications, il est nécessaire de contrôler et de réduire l'amortissement pour améliorer la performance du micro-résonateur. Cependant, le design pour l'amortissement a était un très grand défi parce que nombreux mécanismes complexes sont responsable pour dissiper l'énergie dans des structures. Dans cette thèse, nous nous concentrons sur les micro-résonateurs qui se caractérisent par un amortissement bas et linéaire. Pour de telles structures, l'amortissement peut être modélisé par trois approches classiques (amortisseur visqueux ; ressort avec une rigidité complexe ; solide standard anélastique) et estimer en appliquant des différentes mesures dynamiques et énergétiques (décrément logarithmique ; facteur de qualité ; angle de phase ; capacité d'amortissement spécifique) Une étude approfondie sur les liens entres ces modèles et ces mesures est le fondement de cette thèse. Cela permet une comparaison précise des différentes méthodes de mesure et crée un lien entre les calculs théoriques et les mesures d'amortissements. Ultérieurement, ces liens sont utilisés pour développer un protocole robuste pour estimer l'amortissement en mesurant les bruits thermomécaniques dans les micro-résonateurs. Aussi, cela va nous permettre de dériver des formules pour estimer l'amortissement dans une poutre en couche et des plateaux de micro-résonateur. Le protocole est exécuté et validé en mesurant l'amortissement dans un micro-résonateur silicium monocristallin.
25
Woodhouse, Geoffrey M. "Adjustment for measurement error in multilevel analysis." Thesis, University College London (University of London), 1998. http://discovery.ucl.ac.uk/10019113/.
Full textAbstract:
Measurements in educational research are often subject to error. Where it is desired to base conclusions on underlying characteristics rather than on the raw measurements of them, it is necessary to adjust for measurement error in the modelling process. In this thesis it is shown how the classical model for measurement error may be extended to model the more complex structures of error variance and covariance that typically occur in multilevel models, particularly multivariate multilevel models, with continuous response. For these models parameter estimators are derived, with adjustment based on prior values of the measurement error variances and covariances among the response and explanatory variables. A straightforward method of specifring these prior values is presented. In simulations using data with known characteristics the new procedure is shown to be effective in reducing the biases in parameter estimates that result from unadjusted estimation. Improved estimates of the standard errors also are demonstrated. In particular, random coefficients of variables with error are successfully estimated. The estimation procedure is then used in a two-level analysis of an educational data set. It is shown how estimates and conclusions can vary, depending on the degree of measurement error that is assumed to exist in explanatory variables at level 1 and level 2. The importance of obtaining satisfactory prior estimates of measurement error variances and covariances, and of correctly adjusting for them during analysis, is demonstrated.
26
Pärlstrand, Anders. "Ultrasonic measurement and analysis of screw elongation." Thesis, KTH, Hållfasthetslära (Avd.), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-232519.
Full textAbstract:
Based on the customers' increasing demands on the precision of the preload in a screw joint Atlas Copco is investigating the opportunity to integrate ultrasonic technologies in their industrial tools in order to be able to measure the screw elongation and thereby preload. The preload in a screw joint is important when trying to optimize the joint in terms of weight and life time. The ultrasonic technology for preload measurements has two large advantages; the technique requires only access to the screw head and it is completely independent of the friction in the joint which enables more accurate measurements of the preload. In ultrasonic preload measurements the time of flight is measured (i.e. time for ultrasonic waves to travel through the screw). The time can be transformed into length and elongation by use of the sound velocity. Of importance in this calculation is to take the so called acoustoelastic effect into account which predicts a lower longitudinal wave velocity with increasing tensile stress. The purpose of this master thesis is to develop a method that can predict screw elongations from ultrasonic measurements. Finite element simulations showed that the acoustoelastic ultrasonic constant only depend on the ratio between the clamp length and the screw diameter up to a certain degree of accuracy. A function of type =∙ ∙ where a, b and c are real-valued constants and = is the clamp length () divided by the screw diameter () fits the data well. However, the ultrasonic measurements showed some deviations from the theoretical predictions.
27
Clayton, Sarah Elisabeth. "Tracking, analysis and measurement of pedestrian trajectories." Thesis, Edinburgh Napier University, 2016. http://researchrepository.napier.ac.uk/Output/452997.
Full textAbstract:
Pedestrian movement is unconstrained. For this reason it is not amenable to mathematical modelling in the same way as road trac. Individual pedestrians are notoriously difficult to monitor at a microscopic level. This has led to a lack of primary data that can be used to develop reliable models. Although video surveillance is cheap to install and operate, video data is extremely expensive to process for this purpose. An alternative approach is to use passive infrared detectors that are able to track individuals unobtrusively. This thesis describesthe use of a low cost infrared sensor for use in tracking pedestrians. The sensor itself, manufactured by a British company, is designed to count people crossing an arbitrary datum line. However, with the development of additional software, the functionality of these sensors can be extended beyond their original design specication. This allows the trajectories of individual pedestrians to be tracked. Although the field of view of each sensor is relatively small (44 m), five were deployed in a busy indoor corridor, covering most of its length. In this research, the technical challenges involved in using the sensors in this way are addressed. Statistics derived from the data collected are then compared to other studies at this scale.
28
Svensson, André. "Atmospheric measurement using CanSat : Sensors power analysis." Thesis, Mittuniversitetet, Institutionen för elektronikkonstruktion, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-39601.
Full textAbstract:
The climate change has been an ongoing debate throughout the years. There are already some devices that monitor the changing of the climate, CanSat is a good example. The main goal of this project is to create a CanSat prototype and analyse the power used by it. The focus is on several factors such as the use of power with and without an upload program, the use of power when the sensors are switched on/off and the duration of the battery using the prototype. Some parts of the analysis have been done theoretically and practical. The project has been conducted with the aid of Arduino, an ammeter, and a voltmeter. The results show that the prototype would not spare much power if the sensors are switched off and on, this because not all the sensors have implemented the “sleep mode”. The difference between sleep mode and the normal functionality is equal to 0.026𝑊. Moreover, the difference in power when there is an upload program and when there is not an upload program is equal to 0.057𝑊. The duration of battery in the prototype is equal to 1 hour and 45 minutes according to the theoretical part, while the practical part showed a duration of 1 hour and 11 minutes. Moreover, the results show also that the prototype send the wrong values for some of the sensors when the battery have a low value. It was estimated a value of 7V of battery left to guarantee credible measurements. From the result it is possible to deduce that the decrease of power used from the CanSat prototype can be improved by finding sensors that have implemented the sleep mode, by having a small code and by having an electric platform that consume less power than Arduino. Keywords: CanSat, Power consumption, Battery life, Arduino.
29
Edmark, Marcus, and Olle Benzler. "Measurement Method Analysis of Photonic CO2 Sensor." Thesis, KTH, Skolan för elektro- och systemteknik (EES), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-200580.
Full text
30
Chen, Xiaowei. "Measurement, analysis and improvement of BitTorrent Darknets." HKBU Institutional Repository, 2013. http://repository.hkbu.edu.hk/etd_ra/1545.
Full text
31
Webster, Martin Nicholas. "Measurement and contact analysis of engineering surfaces." Thesis, Imperial College London, 1986. http://hdl.handle.net/10044/1/38184.
Full text
32
Wood, Christopher Martin. "Shape analysis using Young's fringes." Thesis, Liverpool John Moores University, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.261442.
Full text
33
Niu, Xiaochuan. "Measurement, analysis, and detection of nasalization in speech." Full text open access at:, 2008. http://content.ohsu.edu/u?/etd,623.
Full text
34
Lee, Anyu 1963. "Transient analysis of interconnections using spectral method." Thesis, The University of Arizona, 1988. http://hdl.handle.net/10150/276750.
Full textAbstract:
The present paper introduces one very efficient and flexible time-domain analysis technique to predict the kinds of reflections and crosstalk. Numerical results show that this technique is indeed efficient and accurate in the transient analysis of a general multiple line system. Furthermore, this algorithm can be eventually coded in a form of a subroutine compatible with any standard CAD program, such as SPICE.
35
Wu, Chun-Liang, and 吳俊良. "3.5G Network Measurement Analysis." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/9jhmug.
Full textAbstract:
碩士國立臺北科技大學
電腦與通訊研究所
97
Due to higher, and more demand for wireless high speed download from mobile users, the global mobile communication technology has rapidly developed in this field recent years. Basically, the enhancement downloads transmits rate HSDPA technology (i.e. 3.5G) is developed above the 3rd generation mobile communication system. From the aspect of technicality, HSDPA is part of data downloading service enhancement technology under the 3G network platform, which is similar to EDGE performs as to the enhancement version of the GSM/GPRS. Theoretically, 3.5G can provide up to 14.4 Mbps transmit rate and is sufficient to satisfy the demands for mobile wireless internet. From domestic mobile communication operator’s point of view, 3.5G network is simply an upgrade version of 3G network. In order to enhance the mobile wireless internet service, all it needs is to install the additional hardware in current system, and upgrade the software. In Taiwan, the mobile communication operators have started their 3G network back to Q3 of 2005, and 3.5G network in September, 2006. At the beginning stage of 3.5G service, domestic operators focused on the users located in major metropolitan area, and provided up to 3.6Mbps transmit rate. Strategically, as the users increase, the service will also expand to rest of the rural regions gradually. The focus of this thesis is to, through operators’ actual data collected, and surveyed, analyze the relation between the establishments of, and the performance of wireless internet service for the four major mobile telecommunication operators in Taiwan. In my conclusion, might do site survey by operator once again when migrating to 7.2 Mbps or 14.4 Mbps is in progress.
36
Teganya, Yves. "5G Radio Measurement Analysis." Thesis, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-21997.
Full textAbstract:
The wireless smartphone success, applications and services that keep increasing nowadays, raise the demand to provide high bitrate; there is a need to find solutions for that requirement. 5G is the next generation networks that will provide data rates beyond 1Gbps. The aim of this master thesis is to analyze radio measurements gathered with a 5G radio prototype system operating at 15 GHz, which is one of the 5G frequency candidates. The focus of this thesis is to primarily search for different expected and unexpected radio propagation behaviors by comparing measurement results with existing models and characteristics of existing lower frequency bands. This has been done by modeling the blocking objects using MATLAB and mapping the results of the blocking model with the measurements gathered during the blocking. From the obtained results, it was found that the model response was moving close to the average of the measurement for reasonable estimation of the obstacles’ dimensions. The model was found to be sensitive to the height of the obstacles, especially those near the User Equipment (UE). The knife-edge diffraction model was verified and results were in close agreement with the measurements. The outcome of the channel estimate analysis is that the signal penetration varied behind the studied tree, depending on the density of the foliage. Channel gains for the co-polarized antennas at the Transmission Point (TP) and the UE were found to be 9 dB higher than channel gains for the cross-polarized antennas at the TP and the UE. Furthermore, the physical separation between antenna elements at the UE was observed on the MIMO paths when the average channel estimates during the road sign blocking were calculated and plotted.
37
Martins, João Miguel Pizarro. "Innovation measurement - a comparative analysis between innovation measurement literature and innovation measurement tools." Master's thesis, 2019. http://hdl.handle.net/10362/69498.
Full textAbstract:
Innovation is paramount for organizations as a primary source of competitive advantage. It is crucial for organizations to measure and quantify their innovation level in order to optimize resource allocation. There are several tools aimed to evaluate the innovation level of organizations. However, these tools lack some internal validity due to their misalignment with recommendations from research. The present thesis is a comparative analysis between the recommendations from the literature on innovation measurement and the structure of the main tools used for measuring innovation in organizations. Our findings propose recommendations for further improvement of these tools.
38
Li, Hsieh-chin, and 李協親. "Accuracy Analysis of Measurement System." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/64306025866763337363.
Full textAbstract:
碩士義守大學
工業工程與管理學系碩士班
97
In order to sustainable survival and development, and for quality management system requirements, modern enterprises need to develop and implement discipline, to ensure that the product quality. Recently to participate in the ISO 9000 standard certification, or the TS 16949 standard certification, and import the Six Sigma system, the enterprise has been pursuit the international quality criterion of supremacy. As a result of the measurement management is a key element of quality assurance system, modern enterprise should be the measurement system as the focus of inspection item. In1994, the Big Three U.S. automakers first jointly promulgated the QS 9000 standard, formally the Measurement System Analysis as a mandatory item. For in accordance to the ISO 9000:2000 standard, the Big Three U.S. automakers require the quality management system of suppliers will be fully converted to the TS 16949 standard since 2006. However, the MSA is still the requirements item of the system mandatory. As the North American Automotive Industry jointly request the use of MSA has more than 10 years, lead the industry general will be the MSA of the TS 16949 standard as the requirements item of quality management system. The MSA is based on the stability of system performance, and the main content of system performance contains precision and accuracy. The precision evaluation on the MSA, the method of various industries to adopt are similar; but，the accuracy evaluation method of adopted by various industries, it is no different, and many are troubled fallacy. This study investigated the accuracy evaluation method of various industries, including the method of the TS 16949 standard, MINITAB Package and the U.S. Intel Corporation, and exposes their fallacy. Starting from the bivariate normal distribution, this study to build the statistical model of MSA; then, according to the model can master the variation relations between parts value, measured value and appraiser bias. Final, for the accuracy evaluation fallacy of various industries, this study advance the improved methods of meet the needs of various industries; And, this study development the software model of accuracy evaluation, to support the business users.
39
Huang, Po-Jen, and 黃柏仁. "Applications of Thin Film Optical Measurement System and Measurement System Analysis." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/72576120143223212122.
Full textAbstract:
碩士明志科技大學
機電工程研究所
100
Optical inspection technology is often applied in optical components, thin-film materials, and measurements of the surface roughness of metal surface processing. This study aimed to develop an optical measurement system with high measurement speed and high accuracy through simple optical equipment, which can be applied in non-destructive and real-time measurements on mass production lines. Through the non-linear polarized He-Ne and white light interferometer, the surface roughness of low temperature polycrystalline silicon thin-film was measured in this study to propose the best trend equation and the best measurement angle for predicting the surface roughness, with the maximum measurement rate controlled at within 8.61 %. Then, the digital multimeter and photodetector were integrated to develop a low-cost and high-precision fast optical detection system, which were applied in measuring the surface roughness of low-temperature polycrystalline silicone thin-film and chromium carbon nitride. The maximum errors were controlled at 5.72 % and 10.07 %, while the detection time efficiencies were 50 % and 40 % respectively. Moreover, through the measurement system analysis, the system measurement ability was evaluated. The results show that the repeatability and reproducibility of the system expressed in percentage was 7.46 %, which was lower than the accepted criterion of 10 % for measurement systems.
40
LI, YU-JU, and 李育儒. "An Integrated Evaluation System of Measurement System Analysis and Measurement Uncertainty." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/51110528403830561552.
Full textAbstract:
碩士朝陽科技大學
工業工程與管理系
102
In recent years, the quality of the management measurement system plays a very important role in current manufacturing industry. A good measurement system can measure the reliability of the production process and make products competitive. Based on the handbook of Measurement Systems Analysis (MSA), we can evaluate five kinds of characterization including measuring reproducibility and repeatability. In accordance with GUM (Guide to the Expression of Uncertainty in Measurement), the ISO (International Organization for Standardization) recommends assessment methods, the use of type A and type B uncertainty assessment and effective implementation to assess MSA and measurement uncertainty.The purpose of implementing MSA is to understand measurement accuracy as well as the measurement system with the exception of sophisticated improvements, and that of implementing GUM is to affect the measurement accuracy of the measurement process to understand the main factors. This study presents an integrated evaluation system of MSA and GUM to aim at reducing facility costs, shortening the time and improving the accuracy of measurement system. In order to verify the integrated assessment system, this study conducts experiments in the MSA for analyses of reproducibility and repeatability and followed by evaluating the ability of GUM. Through the experimental results on cost-effectiveness of the integrated evaluation system, we can reduce costs by 29%, while the efficiency can shorten the time was 19.9 percent, while the accuracy of the measurement system to improve by 14.1%. This study assessed the measurement system to improve the accuracy of the company's products and produce high-quality and competitive products on the market.
41
Jian-Yu, Chen. "Analysis and Measurement for RFID Detection." 2006. http://www.cetd.com.tw/ec/thesisdetail.aspx?etdun=U0001-1707200611263300.
Full text
42
Yu, Ming-fun, and 游明楓. "ADSL2 + circuit measurement and fault analysis." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/68008501528187256899.
Full textAbstract:
碩士國立中央大學
通訊工程研究所碩士在職專班
95
Recently with the wide wideband network demand is heightened in recent years, the advancing by leaps and bounds of complex software and hardware technology , network service supplier (Internet Service Provider, ISP) Have already used the optic fiber to the building (Fiber To The Building, FTTB) successively in the fetching of the wide band network ,Under the original digital subscriber loop（DSL）, can introduce another services as the image, communication etc. In order to accord with these demand, and that optic fiber is with high costs and not general in DSL, so the first generation asymmetry ADSL( Asymmetric Digital Subscriber Loop, ADSL) of technology to break out will be studying is the direction probed into in recent years. So the standard organization of international telecommunications (ITU-T) it is already asymmetry when it work out the second generation of DSL ADSL2 and the third generation of DSL ADSL2 +, point to improve to old ADSL issue, ADSL2+ fit on original ADSL structure, and use more elasticity except several more than customers supporting it. So the thesis carries on the discussion to the real site environment on ADSL series, from telecommunication provider in the office end (Digital Subscriber Loop Access Multiplexers, DSLAM) to the user end, how to raise on the signal noise rate(SNR) quality of circuit line and study with reducing the decaying value, and also use Remote Digital Subscriber Loop Access Multiplexer( Remote DSLAM) far construction circuit support load with way, as to the thing that remote in the area and exchange the border area of serving area of offices, because the distance of the loop is too long, it is unable to offer the predicament of the wide-band network, using the thesis to improve and go beyond the speed of line rate to support the way of service range containing distance, offer a high-speed solution of internet.
43
Mong-Chih, Shich, and 謝孟志. "SPT Impulse Energy Measurement and Analysis." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/37261753635185425333.
Full text
44
Jung, Chuang-Chieh, and 莊介榮. "The Analysis of WiMax Field Measurement." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/49876771633078639811.
Full textAbstract:
碩士淡江大學
資訊工程學系碩士在職專班
97
In the third generation mobile communication network, the solution for mobile users may proceeded the high speed data communication in any time, any place, Therefore, mobile communication technology extends to use the 4G technology which is also called the WiMax mobile network. This technology integrated the mobile voice communication and the IP network to construct The IP/voice mixed communication in the same mobile network. This is IEEE 802.16 serious. The newest development of this protocol is already to IEEE 802.16e. This technology provides the user the high efficiency of bandwidth for data access in the mobile IP network mutually communication. The essential target of the paper is to propose the actual IEEE 802.16e measurement environment including the line of sight (LOS) and non-line of sight (NLOS) environments in typical urban district area in Taiwan. Both of the fixed point and the non-fixed-point (moving) mobile stations were measured. In order to provide the reference data to the service provider and system integrator, the measurement of data transmission speed and the signal intensity were recorded. The conclusion of the emulation results can be stated as: 1. for the LOS environment, the data transmission quality can be maintained in - 70dbm of signal intensity; 2. for the NLOS environment, it is - 80dbm of signal intensity. We also proposed the best fitting model in our analysis which would be the suitable model in the urban district area in Taiwan. For the LOS environment, the Erceg model B shows the best result. For the NLOS environment, COST-231 Walfish-Ikegami model would be suggested. Regard to the result of the transmission speed, we proposed the reference of the signal level which system integrator should consider to have the handover mechanism between cells. We wish this paper could make contribution to the 4th generation (WiMax) mobile communication network in Taiwan.
45
Shen, Yu-Sheng, and 沈裕盛. "Measurement and Analysis of Grounding Technique." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/52798584575976097293.
Full textAbstract:
碩士義守大學
電子工程學系
90
Grounding is one of the primary ways of minimizing unwanted noise and pickup. Proper use of grounding and cabling, in combination, can solve a large percentage of all noise problems. A good ground system must be designed；It is wishful thinking to expect a ground system to perform well if no thought has been given to its design. It is difficult to believe that expensive engineering time should be devoted to sorting out the minute details of circuit grounding, but in the end, not having to solve mysterious noise problem once the equipment is built and tested saves both money and time. One advantage of a well-designed ground system is that it that it can provide protection against unwanted interference and emission, without any additional per-unit cost to the product. The only cost is the engineer -ing time required to design the system. In comparison, an improperly de -signed ground system may be a primary source of interference and emis -sion and therefore require considerable engineering time to eliminate the problem. Hence properly designed ground systems are truly cost effective. Many grounding schemes and terms have been devised, including digital, analog, safety, signal, noisy, quiet, earth, single-point, multi-point, and so on. Grounding methods must be specified and designed into a product 20H-Rule is a print circuit board layout guideline. On board with power and ground planes, the fringing field at the edges of the board is contained by backing the edge of the power plane away from the edge of the board by a distance equal to 20 times the separation distance between the planes.
46
Yeh, Chung-Cheng, and 葉忠政. "Analysis and Measurement of Electromagnetic Radiation." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/33819101842663147787.
Full textAbstract:
碩士國立臺灣科技大學
電子工程系
95
The effect of electromagnetic wave to the health of human being has been a commonly concerned issue, especially in this highly developed communication era. The widely established base stations of mobile communication has resulted in the increased concern about the dangers of electromagnetic radiation. This, together with the exaggerated report on the subject by the media have caused the frequent confrontations between residents and communication as well as electric power utility companies. This thesis presents the analysis and measurement of the field strength for mobile phone stations and overhead power transmission lines. Measurements for various locations are made to help understand the functional relation between field strength and distance. The measured field data is compared with domestic non-ionized radiation limit to see if it complies with the code. The discrepancies between the calculated and measured values are discussed as well. The largest measured average power density for three personal handy phone stations is 3.7×10-6mW/cm2, which is far less than the safety limit of 0.95 mW/cm2 as required by the code. On the other hand, the largest measured magnetic flux density under overhead power transmission lines is 22mG, which lies within the safety limit of 833.3mG. In short, both calculated and measured values show that the field strength around mobile phone stations and under power transmission lines are far less than the safety limits as required by their respective codes. In addition, close agreement between calculated and measured data are obtained, especially in the three cases of overhead power transmission lines.
47
Chen, Jian-Yu, and 陳建宇. "Analysis and Measurement for RFID Detection." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/48592131776640384602.
Full textAbstract:
碩士國立臺灣大學
電信工程學研究所
94
In this thesis, we propose two detection methods for RFID system: the incoherent detection and the coherent detection. In the RFID system, the amount of the backscattered field is very small compared to the field introduced by the environment and we can increase the detection capability by considering both the magnitude and the phase information of the backscattered field, which is the basic principle of the coherent detection method. We construct a system for the measurement of the backscattered field of the RFID system. When discussing the detection capability, the effects of utilizing different types of antennas and adopting different transmitting power are investigated. We generate and measure the backscattered signal and the two detection methods proposed are used for the demodulation. The performance of the coherent detection is better than the incoherent detection. Besides, the effects on detection capability with different loading impedances are also discussed. In addition, the matching state between the tag antenna and the IC is another important issue in the design of the tag antenna. Therefore, the relation between the matching state and the level difference of the backscattered signal is also investigated.
48
Wei-Tsung, Lee, and 李尉聰. "Digital TV Measurement, Analysis and Watermarking." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/83604956569654810356.
Full textAbstract:
碩士國立交通大學
電子工程系
89
Digital TV (DTV) not only provides a better quality for video and audio services, it can also be used to carry other types of digital data. It will be one of the most important vehicles taking us to the information highway in the 21 century. However, it is different from the conventional TV in many aspects. In this thesis, we focus on the transmission characteristics of DTV and the content security issue. There are three parts in this thesis: (1) field test of ATSC DTV system for adjacent channel interference, (2) comparison of ATSC and DVB-T systems based on several sets of test data, and (3) digital watermarking for ownership protection of image/video data. The reception ability under adjacent channel interference is an important test item particularly during the analog and digital TV co-existing period, because they may interfere each other. Based on the field test results, the DTV signal reception is almost the same with or without the adjacent channel interference. In measuring DTV interference to NTSC, when the lower adjacent channel DTV signal is transmitted, the average of NTSC C/N value drops about 4~5 dB, but it does not change the visual quality much. There are several field tests around the world comparing two DTV systems, ATSC and DVB-T. due to different set-ups and parameters, these test results are not identical, but they show similar tendency. We did a comparison study and summarize our observations in this thesis. Watermarking is a technique that embeds invisible data into multimedia material. It can be used for ownership authentication and identification. There are specific requirements when this technique in this thesis to demonstrate its usefulness. We also discuss the requirements and system architecture for watermark embedding in DTV.
49
Ng, Kim Fung Kelvin. "Some aspects of measurement system analysis." 2002. http://hdl.handle.net/1993/22619.
Full text
50
Huang, Yu-Liang, and 黃友亮. "Mobile Software Quality Measurement and Analysis." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/3ezanj.
Full textAbstract:
碩士國立臺灣海洋大學
資訊工程學系
105
The vigorous development of mobile devices, which not only bring many users, but also attract a lot of software developers. According to Statista, which reported Google play app software has more than 2.8 million applications. However, in so many kinds of applications, they are difficult to solve the problems of mobile software quality measurement and evaluation. In particular, the development of environmental change is so fast, and the mobile software quality becomes very important issue. From the point of view of the good software quality, it is very important for a development team of software production and structure design. This paper for Android system, refer to the QMOOD model and ŞİMŞEK model that provide the software quality measurement technology to measure the mobile market application of software quality. We also look for factors that affect the quality of the software. We successfully tracked several popular development vendors. Besides, we observed the change of trend in the relationship between their several applications of software quality and its version. We learned from different development companies or development team for the quality of software attention. In addition to quality tracking to the same app using different version, we also evaluated the quality of different applications. In this paper, it was based on the binaries technologies, and helps us measure the quality of the software after the application was packaged. Through our development of quality testing tools, we hope to help developers and users understand the relatively unstable quality curve of the same application, and explore the factors, which may potentially affect the quality of software to improve the quality of the overall application program. We found that QMOOD quality attribute of the total score with the market popularity indicators only a very weak relationship, and vendor is a factor that affects the software quality of its application.