Dissertations / Theses on the topic 'Matlab code'

A MATLAB Finite Element code for plane strain analysis of footings on an Elasto-plastic material using the Mohr Coulomb failure criteria has been developed. The first step is to develop codes for mesh generation and Gaussian numerical integration. Next, the force matrix, the stiffness matrix and the self weight matrix are assembled. After that functions for non linear analysis such as the plastic potential derivatives are formed. Finally plots of the mesh, displacement shadings, stress shadings and stress-strain curves are developed. For the purpose of verification results from the code for biaxial test are compared with the theoretical solution. Additionally comparison is made between the code and prandtl’s bearing capacity solutions for a footing problem. These results show that accuracy depends on two factors: - the type of the element and the number of elements used. The three node triangular element and the four node rectangular element give less accurate results when compared to higher order element types. And for a relatively accurate result the number of elements should be too high.

MATLAB to C code translation is of increasing interest for science and industry. In

detail two MATLAB to C compilers denoted as Matlab to C Synthesis (MCS) and

Embedded MATLAB C (EMLC) have been studied. Three aspects of automatic code

generation have been studied; 1) generation of reference code; 2) target code generation;

3) floating-to-fixed-point conversion. The benchmark code used aimed to cover

simple up to more complex code by being viewed from a theoretical as well as practical perspective. A fixed-point filter implementation is demonstrated. EMLC and MCS

offer several fixed-point design tools. MCS provides a better support for C algorithm

reference generation, by covering a larger set of the MATLAB language as such. More

suitable for direct target implementation is code generated from EMLC. As a result

of the need to guarantee that the EMLC generated C-code allocates memory only

statically, MATLAB becomes more constraint by EMLC. Functional correctness was

generally achieved for each automatic translation.

Thales optronique SAS is a company specialized in the design of optronics equipment and missile electronics for air, naval or terrestrial forces. Among their products, the Infrared Cameras such as SOPHIE – for a soldier – or CATHERINE – for a vehicle – are crucial tools for target identification, location and tracking among other surveillance applications. Amid all the functions gathered in these cameras1, the system coping with the optical and electronic zoom is the thesis purpose. Previous works on the zoom system design involved the use of stepper-motors enabling a low cost of production and providing satisfactory results. However, if performances requirements tightened up – a more accurate system, a quicker zoom or a position feedback for instance –, the stepping technology would hit its limits. A new approach providing greater control performances with equivalent size and interfaces – for an easy integration – is required, thus, a DC-motors based system coupled with position feedback sensors is explored.The introduction details the IR cameras’ functionality and current technology: their limits and the alternative are exposed in the Problem statement and the thesis’ objective along with the methodology to complete it. A system description gives an insight of the zoom feature, especially regarding the hardware used and the setup. The third chapter is dedicated to explaining the model used for simulations. A model-based controller design relies on the previously introduced model and constitutes the fourth chapter: its choice is justified and its tuning is explained. It is followed by the whole program implementation on the microcontroller: Matlab Code Generation is introduced and used. Tests are done to validate the goals in the dedicated section, the last chapters discusses the results and their possible improvements. A conclusion goes over the previous chapters and puts them into perspective.
Thales optronique SAS är ett företag specialiserat på konstruktion av optronik utrustning och missil elektronik för luft, sjö- eller landstyrkor. Bland deras produkter finns IR Kameror som SOPHIE - för soldater - eller CATHERINE - för fordon - som är viktiga verktyg för målidentifiering, lokalisering och spårning. Denna rapporten fokuserar på den optiska och elektroniska zoomen i dessa system.  Tidigare arbeten på zoom systemdesign har använd stegmotorer som möjliggör en låg tillverkningskostnad och tillhandahåller tillfredsställande resultat. Men om prestandakraven skärps, t.ex. genom  krav på en mer exakt och snabbare zoom eller lägesretur, sätter stegmotortekniken hårda begränsningar. En ny ansats som ger bättre reglerprestanda med samma storlek och gränssnitt som tidigare krävs. För detta ändamål studeras här användningen av DC motorer kombinerat med positionsåterkoppling från sensorer. Introduktionen ger detaljer kring IR kameraets funktionalitet och nuvarande teknologi; deras begränsningar och alternativa lösningar diskuteras och målet med examensarbetet samt vald metodik redovisas. En systembeskrivning ger insyn i zoom egenskaper, speciellt gällande hårdvara och uppsätt. Det 3:e kapitlet omhandlar modellen som används för simuleringar. En modell baserad regulator, baserat på nämnda modell, presenteras i kapitel 4. Valet av regulator och inställningen av denna motiveras. Efter detta redogörs för implementeringen i en mikrokontroller och Matlabs kodgenerator introduceras och används. Tester görs för att validera målen med regleringen och det sista kapitlet diskuterar resultaten och föreslår möjliga förbättringar. Slutligen dras slutsatser av arbetet och resultaten sätts in i ett perspektiv.

This research discusses how the design of a tornado forward error correcting channel code (FEC) sends digital data stream profiles to the receiver. The complete design was based on the Tornado channel code, binary phase shift keying (BPSK) modulation on a Gaussian channel (AWGN). The communication link was simulated by using Matlab, which shows the theoretical systems efficiency. Then the data stream was input as data to be simulated communication systems using Matlab. The purpose of this paper is to introduce the audience to a simulation technique that has been successfully used to determine how well a FEC expected to work when transferring digital data streams. The goal is to use this data to show how FEC optimizes a digital data stream to gain a better digital communications systems. The results conclude by making comparisons of different possible styles for the Tornado FEC code.

MATLAB est un environnement informatique doté d'un langage de programmation simple et d'une vaste bibliothèque de fonctions couramment utilisées en science et ingénierie (CSE) pour le prototypage rapide. Cependant, certaines caractéristiques de son environnement, comme son langage dynamique ou son style de programmation interactif, affectent la rapidité d'exécution des programmes. Les approches actuelles d'amélioration des programmes MATLAB traduisent le code dans des langages statiques plus rapides comme C ou Fortran, ou bien appliquent systématiquement des transformations de code au programme MATLAB sans considérer leur impact sur les performances. Dans cette thèse, nous comblons cette lacune en développant des techniques d'analyse et de transformation de code des programmes MATLAB afin d'augmenter leur performance. Plus précisément, nous analysons et modélisons le comportement d'un environnement MATLAB black-box uniquement en mesurant l'exécution caractéristique des programmes sur CPU. À partir des données obtenues, nous formalisons un modèle statique qui prédit le type et l'ordonnancement des instructions programmées lors de l'exécution par le compilateur Just-In-Time (JIT). Ce modèle nous permet de proposer plusieurs transformations de code qui améliorent les performances des programmes MATLAB en influençant la façon dont le compilateur JIT génère le code machine. Les résultats obtenus démontrent les avantages pratiques de la méthodologie présentée
MATLAB is a computing environment with an easy programming language and a vast library of functions commonly used in Computation Science and Engineering (CSE) for fast prototyping. However, some features of its environment, such as its dynamic language or interactive style of programming affect how fast the programs can execute. Current approaches to improve MATLAB programs either translate the code to faster static languages like C or Fortran, or apply code transformations to MATLAB code systematically without considering their impact on the performance. In this thesis, we fill this gap by developing techniques for the analysis and codetransformation of MATLAB programs in order to improve their performance. More precisely, we analyse and model the behaviour of the black-box MATLAB environment by measuring the execution characteristics of programs on CPU. From the resulting data, we formalise a static model which predicts the type and order of instructions scheduled by the Just-In-Time (JIT)compiler. This model allows us to propose several code transformations which increase the performance of MATLAB programs by influencing how the JIT compiler generates the machine code. The obtained results demonstrate the practical benefits of the presented methodology

This thesis deals with Matlab application developed for simulation of the DVB-T channel coder and decoder. The first part of this thesis includes description of terrestrial digital video broadcasting system and comparison with analogue television. Channel coding and OFDM modulation, used in the DVB-T standard, is described in detail. Application developed in the Matlab environment is described in the second part. The application simulates data transfer of the DVB-T system. Results of the simulated transmission, using developed application are presented in the last part. Namely dependence of the BER on the S/N ratio, using various coder settings, was examined. Maximal possible data rate was determined for these various setting. All obtained values are graphically represented.

FPGAs are of interest in the signal processing domain as they provide the opportunity to run algorithms at very high speed. One possible use case is to sort incoming data in a measurement system, using e.g. a histogram method. Developing code for FPGA applications usually requires knowledge about special languages, which are not common knowledge in the signal processing domain. High-level synthesis is an approach where high-level languages, as MATLAB or C++, can be used together with a code generation tool, to directly generate an FPGA ready output. This thesis uses the development of a histogram as a test case to investigate the efficiency of three different tools, HDL Coder in MATLAB, HDL Coder in Simulink and System Generator for DSP in comparison to the direct development of the same histogram in Vivado using Verilog. How to write and structure code in these tools for proper functionality was also examined. It has been found that all tools deliver an operation frequency comparable to a direct implementation in Verilog, decreased resource usage, a development time which decreased by 27% (HDL Coder in MATLAB), 45% (System Generator) and 64% (HDL Coder in Simulink) but at the cost of increased power consumption. Instructions for how to use all three tools has been collected and summarised.
I ingångssteget på ett mätsystem är det av intresse att använda en FPGA för att uppnå höga hastigheter på de oundvikliga datafiltrering och sorterings algoritmer som körs. Ett problem med FPGAer är att utvecklingen ställer höga krav på specifik kunskap gällande utvecklingsspråk och miljöer vilket för en person specialiserad inom t.ex. signalbehandling kan saknas helt. HLS är en metodik där högnivåspråk kan användas för digital design genom att nyttja ett verktyg för automatgenerering av kod. I detta arbete har utveckling av ett histogram använts som testfall för att utvärdera effektivitet samt designmetodik av tre olika HLS verktyg, HDL Coder till MATLAB, HDL Coder till Simulink och System Generator for DSP. Utvecklingen i dessa verktyg har jämförts mot utvecklingen av samma histogram i Vivado, där språket Verilog använts. Arbetets slutsater är att samtliga verktyg som testats leverar en arbetsfrekvens som är jämförbar med att skriva histogrammet direkt i Verilog, en minskad resursanvändning, utvecklingstid som minskat med 27% (HDL Coder i MATLAB), 45% (System Generator) och 64% (HDL Coder i Simulink) men med en ökad strömförbrukning. En sammanställning av instruktioner för utveckling med hjälp av verktygen har även gjorts.

The main subject of this thesis is creating a programme, used for channel coding demonstration. This programme will be used for teaching purposes. The programme contains various codes from simple ones, to those which almost reach Shanon’s channel capacity theorem. Specifically these are the Hamming code, cyclic code, convolutional code and LDPC code. These functions are based on theoretical background described in this thesis and have been programed in Matlab. Practical output of this thesis is user interface, where the user is able to input information word, simulate transmission through the transmission channel and observe coding and decoding for each code. This thesis also contains a comparison between individual codes, concerning bit-error rate depending on SNR and various parameters. There is a computer lab with theoretical background, assignment and sheets for convenient accomplishment of each task.

To improve efficacy in the field of drug discovery simpler in vivo, non invasive methods such as PET and SPECT are used. Pharmacokinetic analysis is the underlying method for analyzing the PET data. Imaging of tracer distribution is used to study a metabolic process. Using Matlab as the programming language, a software tool is developed to analyze the quantitative information from PET and to obtain an estimate of pharmacokinetic parameters, representing the bio- distribution of the radiotracer. A Graphical User Interface developed allows two types of analysis, depending upon the nature of the radiotracer: Compartmental Modeling and Logan Plot Analysis. Compartmental analysis gives us rate constants and blood volume where as Logan analysis gives us the distribution volume as the parameter of interest. Code validation is done for two radiotracers, 15O-water (Single compartment model) and FPAC (Logan Plot). Results from the code were compared with those obtained during a research work done to study MDR.

The population in Sweden and around the world is increasing. When population increases, cities become more densely populated and a demand for investments in housing and infrastructure is created. The investments needed are usually large in size and the projects resulting from the investments are often of a complex nature. A major factor responsible for creating the complexity of the projects is the lack of space due to the dense population. The lack of space creates a situation where a very common feature of these types of projects is the use of earth retaining systems. The design of retaining systems in Europe is performed today based on Eurocode. Eurocode is a newly introduced standard for the design of structures and is developed in order to make it easier to work cross borders by using the same principle of design in all countries. For the design of retaining walls in Sweden, Eurocode uses the old standard as the basis of the design procedure consisting of two separate calculations, ultimate limit state and serviceability limit state. Since soil does not consist of two separate mechanisms consisting of failure and serviceability, this approach to solving engineering problems fails to address the real behavior of soils. To handle this problem Bolton et. al. (1990a, 1990b, 2004, 2006, 2008, 2010) developed the theory of “mobilized strength design” where a single calculation procedure incorporates both the calculation of deformations and the safety against failure. The calculation uses conservation of energy and the degree of mobilized shear strength to study deformations in and around the retaining system and the safety against failure in mobilizing the maximum shear strength of the soil. The aim of this thesis was to introduce the theory of mobilized strength design to geotechnical engineers in Sweden working both in academia and in industry. Another aim of the thesis was to develop a tool that could be used to perform calculations of earth retaining systems based on this theory. The development of a working tool has resulted in a Matlab code which can in a simple way be used to calculate both deformations in the retaining system and the safety against failure by using the degree of mobilized shear strength presented in the theory. The Matlab code can handle ground layering with different shear strengths and weights of the soil. A comparison instrument in a Mathcad calculation sheet have been developed to produce results based on the original theory where the feature of soil layering is not incorporated into the calculation procedure. The thesis shows that the Matlab code developed performs well but is not yet sensitive enough to produce the same results as the Mathcad calculation sheet and needs to be further developed to make it more robust in order to handle all different excavation scenarios. v The theory of mobilized strength design has been introduced to geotechnical engineers in Sweden and the thesis studies the theory and shows the calculation procedure and how the different input values and calculations affect the analysis. The thesis also shows some areas in which the theory and the code can be modified and where further research can be performed in order to make them fully applicable to Swedish conditions. As an example the use of rock dowels drilled into the bedrock and attached to the retaining structure is a common feature for deep excavations in Sweden. Further research can be pursued on how to incorporate the energy stored in the rock dowels into the calculation procedure.

Something that has recently gained popularity in the leading car manufacturing companies is the integration of an auto-reverse assistance system to improve the customer experience. The undeniable spread of smartphones and their significant role in human life in recent years, gave rise to the idea of designing an application to be used for reverse driving. As a result, the car company Volvo proposed an idea for this project: to implement an Android based application to facilitate reverse navigation in their trucks. From a technical point of view, the most crucial obstacle that should be addressed is implementing a secure and reliable communication link between the smartphone and the truck's control centre. Hence, the primary goal of this thesis work is to provide a secure channel to transmit data and computing reliability of the com-munication link. Another objective of this project is to define a solution for auto-converting path plan function, currently developed in Matlab, to run on Android devices. In addition, this solution should enable the developer to modify the path plan function in Matlab without having to consider Android programming. The differential method has been proposed for transferring secure data transfer using Bluetooth technol-ogy. This solution not only increases the security of the communication link but also improves transmission time. Another objective has been reached by developing a middleware function using C programming language and Android Native Development Kite (NDK) between An-droid and Matlab. The result of these solutions provides a reliable communication link and runs the developed path plan function in Android phone.

This Diploma thesis deals with Turbo code problems. The Turbo codes belong to the group of error correction codes, sometimes referred to as forward error correcting (FEC) codes or channel codes. This thesis can be thematically divided into two basic parts. The first part describes turbo code encoder and decoder block diagram with the illustration of two most frequently used iterative decoding algorithms (SOVA and MAP). The end of this part contains best known turbo codes, which are used in present communication systems. The second part pursues simulation results for the turbo codes using Binary Phase Shift Keying (BPSK) over Additive White Gaussian Noise (AWGN) channels. These simulations were created in the MATLAB/SIMULINK computer program. It will be shown here, that there exist many different parameters, greatly affecting turbo codes performance. Some of these parameters are: number of decoding iterations used, the input data frame length, generating polynoms and RSC encoders constraint lengths, properly designed interleaving block, decoding algorithm used, etc.

This semestral thesis presents definition of plagiarism and focuses primarily on solving this problem in academic world. The main topic is the detection of plagiarism. It is discussed the various steps of the detection process and special attention is given to plagiarism detection of program codes. The work mentions question of the reliability of detection tools and divides the plagiarism detection methods into basic groups. One chapter is devoted metrics for comparing files. Mentioned are two tools available to detect plagiarism. In the last chapter is analyzed own draft program for plagiarism detection of program codes. The detector was applied to a database of student’s works, and the results were plotted.

The focus of this thesis work was the development of an approachto couple a previosly existing Thermal Energy Storage (TES) modelwritten in C++ with a Simulink/Simscape plant model to simulate anAdvanced Adiabatic Compressed Air Energy Storage (AA-CAES) plant.After the creation and validation of such tool, the complete modelwas used to run simulations, with the aim of assessing the AA-CAESplant's performance under multiple patterns of charge anddischarge.Most of the works found in the literature only provide values ofstorage efficiency obtained from analytical approaches, whilethose that use simulation tools provide average values ofefficiencies when the plant is performing a series of identicalcycles of charge and discharge. During this thesis project,instead, simulations were performed for consecutive irregularcycles determined as the plant response to the electric grid powerrequest. The average efficiency values obtained provide thereforea better representation of how the plant would perform in realapplications.The results show that, under the assumptions made, the AA-CAESplant's overall storage efficiency is influenced very weakly byalterations of the charge-discharge patterns, and that goodperformances can be expected not only for identical chargedischargeconsucutive cycles, but for any pattern that observesthe cavern pressure limits, as long as the thermal energy storageis sized wisely.In addition, a sensitivity analysis was performed in order toassess the influence of turbomachinery efficiency on overallstorage efficiency, for a specified plant layout. The results showthat the turbine efficiency is the most affecting parameter to theplant's performance, while the impact of the main compressors'sinefficiency is mitigated by the thermal recovery that takes placein the TES.The present work confirms that AA-CAES is a promising technologyand that storage efficiencies above 70% can be achieved even inrealistic production scenarios.Finally, future steps for more accurate simulations of plants'performances and more detailed energy production scenarios areproposed.MSc ET 18007Examinator: Joakim WidénÄmnesgranskare: Ane HåkanssonHandledare:

L’objectif principal de cette thèse est de tirer de données LiDAR de télédétection à très haute résolution afin d’extraire une partie du traces tectono-géomorphiques imprimées dans la morphologie de grands tremblements de terre préhistoriques. Les informations consultées dans ces traces constituent l'historique des glissements cumulés de grands tremblements paléoséismique successifs le long d'une faille donnée. L'historique des glissements permet de déterminer le nombre d'événements et les glissements les plus importants produits par ces événements. La connaissance des plus grandes glissades produites par des grands séismes historiques et préhistoriques permettra de déduire l'ampleur potentielle des événements futurs. La caractérisation de la distribution du glissement superficiel fournit des informations importantes sur la mécanique des failles, les contrôles de la propagation de la rupture et la répétabilité de la rupture à certains points le long de la faille. Cependant, la caractérisation et la mesure correctes de la distribution des glissements à partir de formes de relief géomorphologiques déplacées par tectonisme sont accompagnées d'incertitudes considérables, résultant principalement de processus d'érosion et de dépôt. Ces incertitudes pourraient entraîner à la fois une sous-estimation et une surestimation du glissement, ainsi que des résultats contradictoires issus d'enquêtes différentes sur le même défaut. Par conséquent, nous avons développé une nouvelle technique basée sur MATLAB, 3D_Fault_Offsets, pour caractériser mathématiquement, et donc automatiquement, la géométrie 3D de marqueurs géomorphiques décalés (définie par 9 entités géométriques situées de part et d'autre de la faille), puis calculer composants latéraux et verticaux du glissement. Nous estimons que les incertitudes générées par cette technique définissent mieux la gamme des "véritables" compensations potentielles par rapport aux incertitudes plus libérales proposées dans d’autres études, pourtant ils se révèlent assez volumineux. Après vérification de l'efficacité du code en mesurant à nouveau 3 ensembles de données paléosismiques, nous avons l’appliqué à une faille de décrochement qui était historiquement capable d'un séisme de chute de contrainte importante (MW ~ 8,2 en 1855), la faille de Wairarapa. Nous avons identifié et analysé un total d'environ 700 marqueurs géomorphiques déplacés le long d'une zone de données LiDAR de 70 km, ce qui en fait l'un des ensembles de données paléosismiques les plus vastes et les plus denses. Les décalages latéraux mesurés vont de quelques mètres à environ 800 m, mais la majorité d'entre eux sont inférieurs à 80 m, ce qui permet d'examiner les plus récents glissements de faille latéraux. Les décalages verticaux varient entre 0 et ~ 30 m et suggèrent des rapports de glissement vertical / latéral généralement compris entre 10 et 20%. Nous avons effectué les analyses statistiques de la collection dense de décalages mesurés séparément le long des principaux segments successifs qui constituent l'étendue de la faille étudiée. Dans la plupart des segments, cette analyse a révélé la présence de 6 à 7 amas décalés dans la plage allant de 0 à 80 m, suggérant la rupture de la faille de Wairarapa lors de 6 à 7 grands séismes précédents. Les plus grandes glissades que nous déduisons pour ces tremblements de terre passés sont importantes, la plupart dans la plage 7-15 m. Chaque glissement sismique semble varier le long de la faille et généralement plus grand dans sa partie sud. La faille de Wairarapa a ainsi provoqué à plusieurs reprises d'importants séismes dus à la chute de contraintes au cours de la période préhistorique, ce qui souligne le risque sismique élevé qu'elle pose dans le sud de la Nouvelle-Zélande. Par conséquent, l'utilisation de notre nouveau code 3D_Fault_Offsets avec des données topographiques à haute résolution telles que LIDAR peut permettre de mieux évaluer le comportement futur des failles sismogènes
The main scope of this PhD thesis is to utilize very high-resolution remote sensing LiDAR data to extract some of the tectono-geomorphic traces imprinted in the morphology from large prehistoric earthquakes. The information that is accessed in these traces is the cumulative slip history of successive large paleoearthquakes along a given fault. The slip history allows the determination of the number of events and the largest slips produced by those respective events. The knowledge of the largest slips produced by historic and prehistoric large earthquakes will enable some inference into the potential magnitude of future events. Characterizing the distribution of surface slip provides important insights into fault mechanics, controls on rupture propagation, and repeatability of rupture at certain points along the fault. However, properly characterizing and measuring the slip distribution from tectonically-displaced geomorphic landforms comes with considerable uncertainties mostly resulting from erosion and depositional processes. These uncertainties could lead to both underestimation and overestimation of the slip, and to conflicting results from different surveys of the same fault. Therefore, we have developed a new MATLAB-based technique, 3D_Fault_Offsets, to mathematically, and hence automatically, characterize the 3D geometry of offset geomorphic markers (defined by 9 geometric features either side of the fault), and then calculate the lateral and vertical components of slip. We believe that the uncertainties obtained from this technique better define the range of potential ‘true’ offsets compared to more liberal uncertainties offered in other studies, yet they reveal to be fairly large. Upon verification of the code efficacy by successfully re-measuring 3 paleoseismic datasets, we applied it to a strike-slip fault in New Zealand that was historically capable of a large stress drop earthquake (MW~8.2 in 1855), the Wairarapa fault. We identified and analyzed a total of ~700 displaced geomorphic markers along a 70-km stretch of LiDAR data, making this one of the largest and densest paleoseismic datasets. Measured lateral offsets range from a few meters to about 800 m, but the majority are lower than 80 m, providing the means to examine the most recent lateral fault slips. The vertical offsets range between 0 and ~30 m, and suggest vertical to lateral slip ratios commonly in the range 10-20%. We conducted the statistical analyses of the dense collection of measured offsets separately along the successive major segments that form the investigated fault stretch. In most segments, this analysis revealed 6-7 offset clusters in the range 0-80 m, suggesting the Wairarapa fault ruptured in 6-7 previous large earthquakes. The largest slips we infer for these past earthquakes are large, most in the range 7-15 m. Each earthquake slip seems to vary along the fault length, and be generally greater in its southern part. The Wairarapa fault has thus repeatedly produced large stress drop earthquakes in prehistoric time, which emphasizes the elevated seismic hazard it poses in Southern New Zealand. Therefore, the use of our new code 3D_Fault_Offsets with high resolution topographic data such as LIDAR can lead to better assessments of future behavior of seismogenic faults

This thesis project aims to deepen the basic concepts of quantum mechanics with particular reference to quantum information theory and quantum error correction codes, fundamental for a correct reception of information. The relations between these codes and classical ones have been investigated, based upon their representation in terms of stabilizers and then developing a possible error detection code. It has also been examined a classical problem in communication systems, namely frame synchronization, discussing it in quantum communication systems.

The work deals with data security using BCH codes. In the work are described BCH codes in binary and non-binary form, and their most important subclass RS codes. Furthermore, this work describes the method of decoding Peterson-Gorenstein-Zierl, Berlekamp- Massey and Euclidean algorithm. For the presentation of encoding and decoding process, the application was created in Matlab, which has two parts – Learning BCH codes and Simulation of BCH codes. Using the generated application performance of BCH codes was compared at the last part of the work.

The interest of drones in all forms has exploded in the recent years. The development of multirotor vehicles such as quadcopters and octocopters, has reached a point where they are cheap and versatile enough to start becoming a part of everyday life. It is clear to say that the future applications seem limitless. This thesis goes through the steps of development, modelling and control design of an octocopter system. The developed octocopter builds on a concept of using the mini computer Raspberry Pi together with the code generation functionality of Matlab/Simulink. The mathematical modelling of the octocopter includes the thrust and torques generated by the propellers, added with gyroscopic torque. These are combined with the aerodynamic effects caused by incoming air. The importance of modelling the later mentioned effects has increased with the demand of precise controlled extreme manoeuvres. A full state feedback based hybrid controller scheme is designed against a linearized model, which makes use of the motor dynamics. The controllers show good performance in simulations and are approved for flight tests, which are conducted on two separate occasions. The octocopter makes two successful flights, proving that the concept can be applied on multirotor vehicles. However, there is a miss-match between the mathematical model and the physical octocopter, leaving questions for future work.

This research studies the performance of a salinity gradient solar pond driving an absorption cooling system, as an alternative to a conventional electrically powered cooling system, to provide cool air for a modern single family house in the hot dry climate of Baghdad, Iraq. The system comprises a salinity gradient solar pond, a hot-water-fired absorption water chiller, a chilled-water cooling coil which cools the air in the house, and a cooling tower which rejects heat to the ambient air. Hot brine from the pond circulates through a heat exchanger, where it heats water that is then pumped to the chiller. This arrangement protects the chiller from the corrosive brine. The system is controlled on-off by a room thermostat in the house. The system performance is modelled by dynamic thermal simulation using TMY2 hourly typical weather data. TRNSYS software is used for the main simulation, coupled to a MATLAB model of heat and mass transfer in the pond and the ground beneath it. The model of the pond and the ground is one-dimensional (only vertical transfers are considered). Radiation, convection, conduction, evaporation and diffusion are considered; the ground water at some depth below the pond is treated as being at a fixed temperature. All input data and parameter values in the simulation are based on published, standard or manufacturer's data. Temperature profiles in the pond were calculated and found to be in good agreement with published experimental results. It was found that a pond area of approximately 400 m2 was required to provide satisfactory cooling for a non-insulated house of approximately 125 m2 floor area. It was found that varying the pond area, ground conditions and pond layer thicknesses affected the system performance. The optimum site is one that has soil with low thermal conductivity, low moisture content and a deep water table. It is concluded that Iraq's climate has a potential for solar-pond-powered thermal cooling systems. It is feasible to use a solar-pond-powered cooling system to meet the space cooling load for a single family house in the summer season. Improving the thermal performance of the house by insulation could reduce the required solar pond area.

L'obiettivo della tesi è implementare un codice per dimensionare un condensatore e analizzare i grafici ottenuti dal programma in Matlab; è stata inoltre creata anche un'interfaccia grafica dove sono stati inseriti i dati iniziali (modificabili) e si sono analizzati i grafici relativi ai costi per la scelta di una configurazione rispetto ad un'altra. Dopo un'introduzione al condensatore e una descrizione dettagliata delle caratteristiche principali dei condensatori a superficie, si descrive come viene prelevata l'acqua di raffreddamento che scorre all'interno dei tubi del condensatore. In seguito sono presentati tutti i calcoli e i grafici (fatti in Matlab) relativi al dimensionamento del condensatore, in particolare il numero dei tubi, la lunghezza e il diametro del condensatore. Successivamente vengono fatti tutti i calcoli e i grafici relativi alle perdite totali (distribuite più concentrate) e alla potenza della pompa di circolazione dell'acqua di raffreddamento. Infine seguono le valutazioni economiche: in particolare viene calcolato e rappresentato il costo di acquisto totale dell'impianto (condensatore più pompa), il costo di esercizio e si evidenzia come una configurazione di un condensatore rispetto ad un'altra sia più vantaggiosa dal punto di vista economico.

Il ricerca condotta rientra all' interno di un progetto europeo noto come il nome di “Shift2rail”. Shift2Rail è la prima iniziativa ferroviaria europea nata con l’intento di perseguire innovazioni e soluzioni guidate dal mercato, al fine di sviluppare nuove e avanzate tecnologie capaci di poter essere concorrenti all’ interno del mercato dei prodotti ferroviari. Shift2Rail promuove la competitività dell'industria ferroviaria europea e risponderà alle mutevoli esigenze di trasporto dell'UE. Lo studio condotto in questa tesi, accoglie l’idea fino ad oggi non ancora messa in pratica, di concentrarsi sul miglioramento di un elemento in particolare della sezione ferroviaria, lo sleeper o traversina. L’obiettivo della tesi proposta è quello di investigare una nuova forma di sleeper con migliori capacità resistenti, supportato da un codice numerico in Matlab, capace di dimostrare la sua validità, passando attraverso un’ampia analisi del comportamento dell’elemento all’interfaccia sleeper/ballast. La ricerca effettuata si pone quindi solo come punto di partenza e non di arrivo per una nuova area di ricerca che in futuro produrrà risultati stupefacenti.

Au cours de la derniere decennie, le developpement de codes numeriques a ete grandement simplifie par l'apparition d'environnement de developpement offrant une forte convivialite et une grande portabilite. Ainsi, de nombreux numericiens utilisent le logiciel matlab et le langage associe pour verifier la validite de leurs methodes sans se soucier des details d'implantations. Malheureusement, les performances de matlab sont assez faibles car le mecanisme d'interpretation des codes induit un cout non negligeable. Au cours de cette these, nous avons developpe menhir, un environnement permettant la compilation et eventuellement la parallelisation des codes matlab. Nous utilisons une description externe du systeme cible pouvant etre amelioree par les utilisateurs desirant ajouter leur propres methodes de calculs. Cette approche nous permet egalement d'obtenir un logiciel adaptable a des systemes cibles tres differents par leurs architectures materielles, par les bibliotheques de fonctions numeriques disponibles et par les modeles de programmations utilises. Nous avons developpe des techniques d'inferences des types permettant de pallier l'absence de declarations des variables dans les codes matlab. Nous avons egalement developpe une selection automatiques des structures de donnees et des codes numeriques parmis toutes les possibilites proposees dans la description du systeme cible. Nos experimentations montrent que de nombreuses sources d'optimisations permettent d'ameliorer sensiblement les performances des programmes matlab.

La regola di massima nel design di sistemi meccanici, e in particolare di robot, è di rendere l'interfaccia fra attuatore e carico il più rigida possibile. Questo consente di ottenere un controllo di posizione con banda più elevata, e quindi molto veloce e preciso. Questi dispositivi rigidi presentano una impedenza meccanica molto alta (idealmente infinita), e di conseguenza il robot oppone resistenza al movimento, e si muove verso le posizioni comandate indipendentemente dalle forze esterne eventualmente agenti sui giunti. Questi sono di norma aspetti positivi quando il robot non deve interagire con l'ambiente circostante, oppure quando questo ambiente è statico e perfettamente conosciuto. Al contrario, queste caratteristiche non sono auspicabili per robot che operano in ambienti sconosciuti oppure che devono portare a termine compiti che richiedono interazione fra robot e robot, o, ancora peggio, fra uomo e robot. Uno degli approcci più promettenti allo sviluppo di robot capaci di interagire in modo sicuro con l'ambiente mantenendo le caratteristiche di precisione e ripetibilità di posizionamento è quello degli attuatori serial-elastici (SEA). Dal punto di vista meccanico in questi dispositivi viene aggiunto di proposito un elemento elastico (di solito una molla) fra motore e carico, in aperto contrasto con la "regola" tradizionale sopra riportata, rendendo però il problema del controllo più complicato dal momento che vi è un completo disaccoppiamento dinamico fra il lato motore (dove la coppia motrice viene applicata) e il lato carico (cioè la posizione del giunto da controllare). In questo contesto, questa tesi si occupa della modellazione e simulazione di un attuatore serial-elastico del robot FourByThree negli ambienti Matlab/Simulink e ROS/GAZEBO, e dello sviluppo di leggi di controllo sia model-based basate su Filtro di Kalman che adaptive, basate su Model Reference Adaptive Control.

The use of Ultra-Wideband (UWB) radio technology in a multistatic radar system has recently gained interest to implement Wireless Sensor Networks (WSN) capable of detecting and tracking targets in indoor environments. Due to the increasing attention towards multistatic UWB systems, it is important to perform the radio channel characterization. In this thesis we focus on the characterization of the path loss exponent (α). To perform the present work, the followed methodology was to collect experimental data from the UWB devices using a suitable target, this information was processed with a clutter removal algorithm using the Empty Room (ER) approach, then the contribution of the target was isolated to produce a graph of energy as a function of the product between the target-to-transmitter and the target-to-receiver distances in a bistatic configuration. Finally, using this plot it was properly obtained the value of the path loss exponent. As as additional experimental result, the main statistical parameters associated to the residual clutter were calculated, which are expected to allow having a better understanding and characterization of the radar system performance in the experimental environments.

En aéronautique civile, les systèmes électriques qui composent l'avion sont de plus en plus nombreux, de par l'accroissement des fonctionnalités, des besoins des usagers (confort), mais aussi par le besoin d'améliorer les performances des actionneurs électromécaniques et hydrauliques, voire de les remplacer par du tout électrique. Ainsi, les systèmes d'électroniques de puissance sont les premiers dispositifs électriques que voient les actionneurs. Ces dispositifs sont interfacés avec les interfaces de pilotage par des systèmes de contrôles-commandes.
Les normes aéronautiques imposent que tous les dispositifs utilisés dans un avion répondent à des contraintes sévères quant à leur fiabilité et leur sécurité de fonctionnement. Dans le cas précis des convertisseurs statiques qui pilotent les actionneurs, on est confronté aux normes de fonctionnement des réseaux électriques, aux normes C.E.M., aux normes environnementales (au sens du contexte du dispositif), et aux normes liés aux systèmes de contrôle.
Le marché de l'aéronautique, bien que très spécifique, est très concurrentiel au niveau mondial. Les multiples objectifs de matériels très performants, très fiables, très sûrs, mais les moins chers possibles sont donc de véritables problématiques.
Dans le cadre des convertisseurs statiques, un moyen pour réduire les coûts est l'utilisation de DSP (Digital Signal Processors) pour maximiser l'intégration de la commande et pour réduire les coûts, mais ce composant n'est pas conçu pour le milieu aéronautique.
L'ensemble de cette étude porte sur la conception d'un nouveau type de radar marqué par plusieurs ruptures technologiques. Le prototype réalisé comporte un convertisseur statique piloté par un DSP, mais ayant des fonctionnalités qui vont largement au-delà du convertisseur basique d'électronique de puissance. L'aspect « système » est largement pris en compte. Le convertisseur mis en oeuvre est un dispositif autonome de pilotage de moteurs.

Generating C code from MATLAB can be a powerful tool for a wide range of engineering problems. Especially in cases where MATLAB excels, including matrix operations and some of the built-in functions, code conversion may represent a significant assistance in their development. The aim of this master's thesis is to explore the possibilities of generating C code using MATLAB Coder App. As the documentation for MATLAB Coder was not found sufficient a theoretical basis for the use of this tool was introduced along with simple examples of possible applications. Next, code generation for controlling a laboratory DC motor using a microcontroller dsPIC was made automatic and controlled directly from a single MATLAB script. Individual steps were described to supplement existing documentation and to allow for an easy use. Finally, selected functions were tested for code generation. As a result, certain limitations can be outlined, as well as suitability of both the created tool and the MATLAB Coder App.

The topic of this thesis is the design and realization of a modular Data concentrator for various types of measurements in diverse conditions. The device conception, basic principles, design and functionality are described herein. Also, the lightweight protocol design for radio communication, standardized XML format for data storage and cloud usage are described. The electrical design of the device as well as the design of the printed circuit board was made using the Eagle Autodesk electronic design automation software (Eagle Autodesk EDA). The control software written in C/C++ for a target microcontroller (ESP32-WROOM-32) is based on a FreeRTOS platform and ESP-IDF framework. An IDE for managing this software is Visual Studio Code with PlatformIO extension. Selected and used Cloud Platform is ThingSpeak from Mathworks, which uses certain components from Matlab platform.

Electrical Bioimpedance (EBI) is the opposition offered by the biological material to theflow of electric current. Nowadays EBI technology is widely used for total body compositionand body fluid distribution.In this project a software suite is developed by using the GUI tool of Matlab, thissoftware is meant to help to remove artefacts from the EBI measurement and to visualize theEBIS measurements and the processing performed on them.Hook effect is one of the major artefacts found in EBI measurements, which createsproblems in any analysis. To eliminate the Hook effect some methods are followed. The data’sare processed using these methods and they are visualized. For the better understanding, bothraw data and the corrected data are plotted in impedance and admittance plots. The correcteddata is stored for further use and analysis.

Dans cette thèse, nous modélisons le passage d'une onde acoustique à travers un matériau poreux supposé périodique (mousse ou laine de verre). L'objectif est d'établir un système d'équations macroscopiques, prenant en compte la microstructure du domaine, sur un matériau homogène équivalent. Nous commençons par définir la modélisation du problème et nous obtenons un système non coercif écrit en fréquence afin de répondre aux problématiques industrielles. Nous établissons ensuite le caractère bien posé du système avant de le faire converger double échelle. Nous obtenons ainsi deux systèmes de cellule : un système de Stokes pour le fluide et un système de type élasticité linéaire pour décrire le déplacement du matériau. Au niveau macroscopique, nous obtenons un système couplé non intuitif. Nous finissons la partie théorique par une comparaison entre le modèle que nous avons obtenu et le modèle de Biot-Allard utilisé par les physiciens et industriels pour traiter ce type de problème. Enfin, nous illustrons le travail précédent grâce à des résultats numériques.

This work deals with three-phase active rectifier control. In first, theoretical part it describes several control strategies with focus on voltage oriented control. For this type of control a design is worked out, and created model and its simulation is described. Second, practical part deals with realisation on microcontroller TMS320F28335, which is main processing unit of device lent by company Elcom. Therefore in this part abilities and settings of the controller along with developped control algorithm are described. Reached results of measurement are then presented and in the conclusion they are evaluated.

In the last years, the importance of locating people and objects and communicating with them in real time has become a common occurrence in every day life. Nowadays, the state of the art of location systems for indoor environments has not a dominant technology as instead occurs in location systems for outdoor environments, where GPS is the dominant technology. In fact, each location technology for indoor environments presents a set of features that do not allow their use in the overall application scenarios, but due its characteristics, it can well coexist with other similar technologies, without being dominant and more adopted than the others indoor location systems. In this context, the European project SELECT studies the opportunity of collecting all these different features in an innovative system which can be used in a large number of application scenarios. The goal of this project is to realize a wireless system, where a network of fixed readers able to query one or more tags attached to objects to be located. The SELECT consortium is composed of European institutions and companies, including Datalogic S.p.A. and CNIT, which deal with software and firmware development of the baseband receiving section of the readers, whose function is to acquire and process the information received from generic tagged objects. Since the SELECT project has an highly innovative content, one of the key stages of the system design is represented by the debug phase. This work aims to study and develop tools and techniques that allow to perform the debug phase of the firmware of the baseband receiving section of the readers.

This thesis focuses on detection algorithms of radar targets, namely on group of techniques for removing of disturbing reflections from static objects - clutter and for suppression of distortion products caused by the phase noise of the transmitter and receiver. Methods for distortion suppression in received signal are designed for implementation in the developed active multistatic radar, which operates in the code division multiplex of several transmitters on single frequency. The aim of the doctoral thesis is to design, implement in tool for technical computing MATLAB and analyze the effectiveness and computational complexity of these techniques on simulated and real data.

This report deals with the modeling of a part of the communication system based on the IEEE 802.11a standard which represents the next generation of wireless LAN with greater scalability, better interference immunity and significantly higher speed, up to 54 Mbps.

802.11a uses Orthogonal Frequency Division Multiplexing (OFDM) where modulation is performed by an IFFT and the demodulation by an FFT.

After modeling the FFT in Matlab and C, the FFT implementation has been validated using a soft microprocessor core by Xilinx (Microblaze) and the results were compared.

Attualmente i mezzi per ottenere diagnosi precoci di COVID-19 si rivelano inadeguati per ridurre il contagio del virus. Il COVID-19 è una malattia respiratoria e studi clinici dimostrano che altera il pattern normale di respirazione in maniera differente ad altre patologie come asma e raffreddore comune inoltre pazienti positivi al virus presentano suoni respiratori anormali dimostrando un legame fisico tra alterazione vocale e infezione di COVID-19. Diversi studi dimostrano che è possibile classificare e identificare queste alterazioni tramite l'analisi campioni acustici di tosse, voce e suoni respiratori. L'analisi vocale è uno strumento di diagnosi che viene già adoperato per l'individuazione di patologie come il morbo di Parkinson, l'apnea notturna ostruttiva e disturbi dello spettro autistico; L'obbiettivo di questo elaborato è dunque di valutare se esso possa costituire un metodo efficace nella diagnosi di COVID-19.

This Diploma thesis aims to explain the data coding using turbo codes. These codes belong to the group of error correction codes. We can reach the high efficiency using these codes. The first part describes process of encoding and decoding. There are describes parts of encoder and decoder. Principle of encoding and decoding demonstrate a simple example. The end of this part contains description of two most frequently used decoding algorithms (SOVA and MAP). The second part contains description of computer program that was made for using as teaching aid. This program was created in Matlab GUI. This program enables to browse error correction process step by step. This program contains graphic interface with many options and display results. In the third part is described program created in Matlab Simulink that was implemented into the TMS320C6713 kit and there is description of measuring procedure. For verification of efficiency of turbo codes was measured any parameters. Some of these parameters are: number of decoding iterations, generating polynoms and using of puncturing. The last part contains measured value and result evaluation.

To take advantage of the high speed in an optic fiber, one of the basic concept in fiber optic communication is to allow several users to simultaneously transmit data over the channel. One technique that provides multiple access is it fiber optic-code division multiple access (FO-CDMA). In FO-CDMA each user is assigned one or more signature sequences called codewords, which are subsets of a type of optical orthogonal code (OOC). The channel input/output consists of the superposition of several users codewords and at the receiver end an optical correlator extracts the information.

In the parallel code constructions, presented in this report, each user j is assigned a subset Cj from a code C. The subsets are disjoint and their union is the whole set C. A new way to map the information bits is to insert up to L zeros before each codeword from Cj and let this represent information aswell. This gives high rates for active users but an investigation is needed to ensure that this does not compromise the systems wanted property of sending information with a small probability of errors for all users. Therefore a simulation environment has been implemented in Matlab.

The result from these simulations shows that BER for the L parallel codes is acceptable and not much higher than for the traditional constructions. Because of the higher rate these construction should be preferred but an analysis if a hardware implementation is possible.

This PhD study, developed at Universitat Politècnica de València (UPV), aims to cover the first phase of the benchmark released by the expert group on Uncertainty Analysis in Modeling (UAM-LWR). The main contribution to the benchmark, made by the thesis' author, is the development of a MATLAB program requested by the benchmark organizers. This is used to generate neutronic libraries to distribute among the benchmark participants. The UAM benchmark pretends to determine the uncertainty introduced by coupled multi-physics and multi-scale LWR analysis codes. The benchmark is subdivided into three phases: 1. Neutronic phase: obtain collapsed and homogenized problem-dependent cross sections and criticality analyses. 2. Core phase: standalone thermohydraulic and neutronic codes. 3. System phase: coupled thermohydraulic and neutronic code. In this thesis the objectives of the first phase are covered. Specifically, a methodology is developed to propagate the uncertainty of cross sections and other neutronic parameters through a lattice physics code and core simulator. An Uncertainty and Sensitivity (U&S) analysis is performed over the cross sections contained in the ENDF/B-VII nuclear library. Their uncertainty is propagated through the lattice physics code SCALE6.2.1, including the collapse and homogenization phase, up to the generation of problem-dependent neutronic libraries. Afterward, the uncertainty contained in these libraries can be further propagated through a core simulator, in this study PARCSv3.2. The module SAMPLER -available in the latest release of SCALE- and DAKOTA 6.3 statistical tool are used for the U&S analysis. As a part of this process, a methodology to obtain neutronic libraries in NEMTAB format -to be used in a core simulator- is also developed. A code-to-code comparison with CASMO-4 is used as a verification. The whole methodology is tested using a Boiling Water Reactor (BWR) reactor type. Nevertheless, there is not any concern or limitation regarding its use in any other type of nuclear reactor. The Gesellschaft für Anlagen und Reaktorsicherheit (GRS) stochastic methodology for uncertainty quantification is used. This methodology makes use of the high-fidelity model and nonparametric sampling to propagate the uncertainty. As a result, the number of samples (determined using the revised Wilks' formula) does not depend on the number of input parameters but only on the desired confidence and uncertainty of output parameters. Moreover, the output Probability Distribution Functions (PDFs) are not subject to normality. The main disadvantage is that each input parameter must have a pre-defined PDF. If possible, input PDFs are defined using information found in the related literature. Otherwise, the uncertainty definition is based on expert judgment. A second scenario is used to propagate the uncertainty of different thermohydraulic parameters through the coupled code TRACE5.0p3/PARCSv3.0. In this case, a PWR reactor type is used and a transient control rod drop occurrence is simulated. As a new feature, the core is modeled chan-by-chan following a fully 3D discretization. No other study is found using a detailed 3D core. This U&S analysis also makes use of the GRS methodology and DAKOTA 6.3.
Este trabajo de doctorado, desarrollado en la Universitat Politècnica de València (UPV), tiene como objetivo cubrir la primera fase del benchmark presentado por el grupo de expertos Uncertainty Analysis in Modeling (UAM-LWR). La principal contribución al benchmark, por parte del autor de esta tesis, es el desarrollo de un programa de MATLAB solicitado por los organizadores del benchmark, el cual se usa para generar librerías neutrónicas a distribuir entre los participantes del benchmark. El benchmark del UAM pretende determinar la incertidumbre introducida por los códigos multifísicos y multiescala acoplados de análisis de reactores de agua ligera. El citado benchmark se divide en tres fases: 1. Fase neutrónica: obtener los parámetros neutrónicos y secciones eficaces del problema específico colapsados y homogenizados, además del análisis de criticidad. 2. Fase de núcleo: análisis termo-hidráulico y neutrónico por separado. 3. Fase de sistema: análisis termo-hidráulico y neutrónico acoplados. En esta tesis se completan los principales objetivos de la primera fase. Concretamente, se desarrolla una metodología para propagar la incertidumbre de secciones eficaces y otros parámetros neutrónicos a través de un código lattice y un simulador de núcleo. Se lleva a cabo un análisis de incertidumbre y sensibilidad para las secciones eficaces contenidas en la librería neutrónica ENDF/B-VII. Su incertidumbre se propaga a través del código lattice SCALE6.2.1, incluyendo las fases de colapsación y homogenización, hasta llegar a la generación de una librería neutrónica específica del problema. Luego, la incertidumbre contenida en dicha librería puede continuar propagándose a través de un simulador de núcleo, para este estudio PARCSv3.2. Para el análisis de incertidumbre y sensibilidad se ha usado el módulo SAMPLER -disponible en la última versión de SCALE- y la herramienta estadística DAKOTA 6.3. Como parte de este proceso, también se ha desarrollado una metodología para obtener librerías neutrónicas en formato NEMTAB para ser usadas en simuladores de núcleo. Se ha realizado una comparación con el código CASMO-4 para obtener una verificación de la metodología completa. Esta se ha probado usando un reactor de agua en ebullición del tipo BWR. Sin embargo, no hay ninguna preocupación o limitación respecto a su uso con otro tipo de reactor nuclear. Para la cuantificación de la incertidumbre se usa la metodología estocástica Gesellschaft für Anlagen und Reaktorsicherheit (GRS). Esta metodología hace uso del modelo de alta fidelidad y un muestreo no paramétrico para propagar la incertidumbre. Como resultado, el número de muestras (determinado con la fórmula revisada de Wilks) no depende del número de parámetros de entrada, sólo depende del nivel de confianza e incertidumbre deseados de los parámetros de salida. Además, las funciones de distribución de probabilidad no están limitadas a normalidad. El principal inconveniente es que se ha de disponer de las distribuciones de probabilidad de cada parámetro de entrada. Si es posible, las distribuciones de probabilidad de entrada se definen usando información encontrada en la literatura relacionada. En caso contrario, la incertidumbre se define en base a la opinión de un experto. Se usa un segundo escenario para propagar la incertidumbre de diferentes parámetros termo-hidráulicos a través del código acoplado TRACE5.0p3/PARCSv3.0. En este caso, se utiliza un reactor tipo PWR para simular un transitorio de una caída de barra. Como nueva característica, el núcleo se modela elemento a elemento siguiendo una discretización totalmente en 3D. No se ha encontrado ningún otro estudio que use un núcleo tan detallado en 3D. También se usa la metodología GRS y el DAKOTA 6.3 para este análisis de incertidumbre y sensibilidad.
Aquest treball de doctorat, desenvolupat a la Universitat Politècnica de València (UPV), té com a objectiu cobrir la primera fase del benchmark presentat pel grup d'experts Uncertainty Analysis in Modeling (UAM-LWR). La principal contribució al benchmark, per part de l'autor d'aquesta tesi, es el desenvolupament d'un programa de MATLAB sol¿licitat pels organitzadors del benchmark, el qual s'utilitza per a generar llibreries neutròniques a distribuir entre els participants del benchmark. El benchmark del UAM pretén determinar la incertesa introduïda pels codis multifísics i multiescala acoblats d'anàlisi de reactors d'aigua lleugera. El citat benchmark es divideix en tres fases: 1. Fase neutrònica: obtenir els paràmetres neutrònics i seccions eficaces del problema específic, col¿lapsats i homogeneïtzats, a més de la anàlisi de criticitat. 2. Fase de nucli: anàlisi termo-hidràulica i neutrònica per separat. 3. Fase de sistema: anàlisi termo-hidràulica i neutrònica acoblats. En aquesta tesi es completen els principals objectius de la primera fase. Concretament, es desenvolupa una metodologia per propagar la incertesa de les seccions eficaces i altres paràmetres neutrònics a través d'un codi lattice i un simulador de nucli. Es porta a terme una anàlisi d'incertesa i sensibilitat per a les seccions eficaces contingudes en la llibreria neutrònica ENDF/B-VII. La seua incertesa es propaga a través del codi lattice SCALE6.2.1, incloent les fases per col¿lapsar i homogeneïtzar, fins aplegar a la generació d'una llibreria neutrònica específica del problema. Després, la incertesa continguda en la esmentada llibreria pot continuar propagant-se a través d'un simulador de nucli, per a aquest estudi PARCSv3.2. Per a l'anàlisi d'incertesa i sensibilitat s'ha utilitzat el mòdul SAMPLER -disponible a l'última versió de SCALE- i la ferramenta estadística DAKOTA 6.3. Com a part d'aquest procés, també es desenvolupa una metodologia per a obtenir llibreries neutròniques en format NEMTAB per ser utilitzades en simuladors de nucli. S'ha realitzat una comparació amb el codi CASMO-4 per obtenir una verificació de la metodologia completa. Aquesta s'ha provat utilitzant un reactor d'aigua en ebullició del tipus BWR. Tanmateix, no hi ha cap preocupació o limitació respecte del seu ús amb un altre tipus de reactor nuclear. Per a la quantificació de la incertesa s'utilitza la metodologia estocàstica Gesellschaft für Anlagen und Reaktorsicherheit (GRS). Aquesta metodologia fa ús del model d'alta fidelitat i un mostreig no paramètric per propagar la incertesa. Com a resultat, el nombre de mostres (determinat amb la fórmula revisada de Wilks) no depèn del nombre de paràmetres d'entrada, sols depèn del nivell de confiança i incertesa desitjats dels paràmetres d'eixida. A més, las funcions de distribució de probabilitat no estan limitades a la normalitat. El principal inconvenient és que s'ha de disposar de les distribucions de probabilitat de cada paràmetre d'entrada. Si és possible, les distribucions de probabilitat d'entrada es defineixen utilitzant informació trobada a la literatura relacionada. En cas contrari, la incertesa es defineix en base a l'opinió d'un expert. S'utilitza un segon escenari per propagar la incertesa de diferents paràmetres termo-hidràulics a través del codi acoblat TRACE5.0p3/PARCSv3.0. En aquest cas, s'utilitza un reactor tipus PWR per simular un transitori d'una caiguda de barra. Com a nova característica, cal assenyalar que el nucli es modela element a element seguint una discretizació totalment 3D. No s'ha trobat cap altre estudi que utilitze un nucli tan detallat en 3D. També s'utilitza la metodologia GRS i el DAKOTA 6.3 per a aquesta anàlisi d'incertesa i sensibilitat.¿
Mesado Melia, C. (2017). Uncertainty Quantification and Sensitivity Analysis for Cross Sections and Thermohydraulic Parameters in Lattice and Core Physics Codes. Methodology for Cross Section Library Generation and Application to PWR and BWR [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/86167
TESIS

Electrical Bioimpedance measurement has been used in clinical practice for several years for non-invasive monitoring. In recent years new applications of electrical bioimpedance measurements based in the spectral analysis has been validated.This fact have encouraged the use of spectral analysis on Electrical Bioimpedance measurements and it is a wide spread idea that spectral analysis of electrical bioimpedance data is going to open the door for new indicators for health assessment.The intended goal of this project is to develop a software tool, based in Matlab, that allows researchers to perform, both spectral and time signal analysis on the measurements performed Electrical Bioimpedance Spectrometers. This tool must incorporate the necessary display capabilities to allow quick visual inspection and visualization of the analysis results.Once this tool has been implemented, spectral analysis and validation of classification features will be possible in an easy way accelerating the process of test and analysis of experimental data analysis. This task is always critical in any research or clinical study.To facilitate the spectral analysis of electrical bioimpedance data will contribute to the developing of novel methods of non-invasive diagnosis and monitoring.
Uppsatsnivå: D

Analysis of vibration transmission and reflection in beam-like engineering structures requires better predictive models to optimise structural behaviour further. Numerous studies have used flexural and longitudinal structural wave motion to model the vibrational response of angled junctions in beam-like structures, to better understand the transmission and reflection properties. This study considers a model of a variable joint angle which joins two semi-infinite rectangular cross-section beams. In a novel approach, the model allows for the joint to expand in size as the angle between the two beams is increased. The material, geometric and dynamics properties were consistently being considered. Thus, making the model a good representation of a wide range of angles. Predicted results are compared to an existing model of a joint between two semi-infinite beams where the joint was modelled as a fixed inertia regardless of the angle between the beams, thus limiting its physical representation, especially at the extremes of angle (two beams lay next to each other at 180 degree joint). Results from experimentation were also compared to the modelling, which is in good agreement for the range of angles investigated. Optimum angles for minimum vibrational power transmission are identified in terms of the frequency of the incoming flexural or longitudinal wave. Extended analysis and effect of adding stiffness and damping (rubber material) at the joint are also reported.

The aim is to explain the Turbo convolutional and block turbo codes and decoding the secure message. The practical part focuses on the design of a demonstration program in Matlab. The work is divided into four parts. The first two deal with theoretical analysis of coding and decoding. The third section contains a description created a demonstration program that allows you to navigate the process of encoding and decoding. The fourth is devoted to simulation and performance of turbo codes.

The aim of this thesis are problematics about LDPC codes. There are described metods to create parity check matrix, where are important structured metods using finite geometry: Euclidean geometry and projectice geometry. Next area in this thesis is decoding LDPC codes. There are presented four metods: Hard-Decision algorithm, Bit-Flipping algorithm, The Sum-Product algorithm and Log Likelihood algorithm, where is mainly focused on iterative decoding methods. Practical output of this work is program LDPC codes created in environment Matlab. The program is divided to two parts -- Practise LDPC codes and Simulation LDPC codes. The result reached by program Simulation LDPC codes is used to create a comparison of creating and decoding methods LDPC codes. For comparison of decoding methods LDPC codes were used BER characteristics and time dependence each method on various parameters LDPC code (number of iteration or size of parity matrix).

This dissertation thesis is focused to interference investigation in UMTS network and interference influence to error ratio and signal to noise or interference ratio. There are presented models based on UMTS physical layer specifications that simulate signal transmission and processing. The aim of simulations is to analyze different types of interference and to appoint the possibilities of this interference decrease.

L'elaborato tratta l'analisi di uno script Matlab che simula la tratta Uplink di sistemi 5G. In particolare ne analizza le funzioni che implementano la ricezione, cercando, attraverso l'utilizzo di tool come Matlab Coder, di convertirle in linguaggio C/C++ rendendole editabili e adattabili a varie esigenze; alcune di queste potrebbero essere sistemi embedded oppure ambienti Linux. Il coder è in grado di generare anche MEX files utilizzabili su Matlab che, in questo particolare caso ed in casi analoghi, migliorano le prestazioni dei tempi di esecuzione dello script. Vengono analizzate le criticità comparse durante i test e illustrate le possibili soluzioni che migliorano l'implementazione.

Orientador: Luis Geraldo Pedroso Meloni
Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Eletrica e de Computação
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Resumo: Este trabalho descreve o estudo, a pesquisa e compilação de técnicas de otimização de códigos em FPGA (Field Programmable Gate Arrays) utilizando uma ferramenta de prototipagem rápida. Para isso, foram implementados alguns algoritmos para auxiliar na apresentação e avaliação de quatro técnicas de otimização: uso de recursos alternativos, multiplexação no tempo, algoritmos alternativos e mudança da freqüência sistêmica. As principais contribuições do presente trabalho foram: compilar em um único documento diversas técnicas para geração eficiente de códigos de processamento digital de sinais; o estudo das etapas de fluxo de projeto baseado em ferramentas de prototipagem rápida; implementações de diversos algoritmos para demonstrar as técnicas de otimização, visando-se o estudo da minimização da área de ocupação em FPGA. Com o uso das técnicas pode-se alcançar uma redução de área da FPGA de até 90%, conforme a complexidade do sistema alvo.
Abstract: This work describes the study, research and compilation of programming optimization techniques for FPGA (Field Programmable Gate Arrays) using a tool technology for rapid prototyping. For this purpose, some algorithms have been implemented to help the presentation and evaluation of four optimization techniques: alternative resources usage, time multiplexing, alternative algorithms and systemic frequency change. The main contributions of this work are: compilation in one document several efficient techniques for generation code in digital signal processing; study of the phases of design flow were based on rapid prototyping tools; implementations of several algorithms to demonstrate the optimization techniques, looking for the minimization of the FPGA occupation area. With the use of these techniques, it is possible to reach a FPGA area reduction of up to 90%, depending of the complexity of the target system.
Universidade Estadual de Campi
Telecomunicações e Telemática
Mestre em Engenharia Elétrica

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES
For a long time, human societies have built a great deal of knowledge about the environments in which they are inserted, including knowledge about plant resources. This knowledge, ethnobotany's object of study, has guaranteed the survival of these populations as food, fuel and in the relief and cure of diseases. The present paper was structured in two chapters and had as it's objective to carry out an ethnobotanical survey on the knowledge and use of medicinal plants used by the inhabitants of the Ipiranga quilombola community, located in the south coast of Paraíba. In the first chapter, a survey of medicinal plant species was done according to the local knowledge, along with an analysis of the Usage Value and Informant Consensus Factor indexes. The interview method was applied through semi-structured questionnaires with a total of 100 community residents, 29 men and 71 women, between 20 and 90 years of age. the Usage Value and Informant Consensus Factor indexes were then estimated from the collected data. In the second chapter, a comparison between three different generations on the knowledge of medicinal plants was made, with a total of 171 individuals interviewed, and from the data, a Pearson correlation and an analysis of variance was accomplished. A total of 80 species, distributed in 66 genera and 38 botanical families, were identified. From the interviews, it was known that, in the majority, the leaves are the most used parts in the preparation of the medication, mainly through tea brewing. Most of the species used are grown in backyards. The medicinal species were indicated for the treatment of 66 diseases and classified into 14 categories of bodily systems. Regarding ethnobotanical knowledge among different generations, the results showed that older members of the group knew more species, as well as indicated a greater amount of uses for them.
Durante muito tempo, as sociedades humanas têm construído um grande conhecimento a respeito dos ambientes onde estão inseridas, incluindo os conhecimentos sobre os recursos vegetais. Este saber, objeto de estudo da etnobotânica, tem garantido a sobrevivência dessas populações seja como alimento, como combustível e também no alívio ou cura de doenças. O presente trabalho teve como objetivo realizar um levantamento etnobotânico sobre o conhecimento e uso das plantas medicinais utilizadas pelos moradores da comunidade quilombola Ipiranga, localizada no litoral sul da Paraíba, sendo estruturado em dois capítulos. O primeiro capitulo foi feito um levantamento das espécies de plantas medicinais segundo o conhecimento local, juntamente com a análise dos índices Valor de Uso e Fator de Consenso do Informante. Foi aplicado o método de entrevistas através dos questionários semiestruturados com um total de 100 moradores da comunidade, sendo 29 homens e 71 mulheres, entre 20 e 90 anos de idade. A partir dos dados foram estimados os índices de Valor de Uso e Fator de Consenso do Informante. O segundo capítulo foi feito uma comparação entre três diferentes gerações sobre o conhecimento das plantas medicinais com um total de 171 indivíduos entrevistados, sendo realizada a partir dos dados uma correlação de Pearson e análise de variância. Um total de 80 espécies distribuídas em 66 gêneros e 38 famílias botânicas foram identificadas. A partir das entrevistas ficou conhecido que, em sua maioria, são as folhas as partes mais utilizadas no preparo da medicação, principalmente através dos chás. A maior parte das espécies utilizadas são cultivadas nos quintais. As espécies medicinais foram indicadas para tratamento de 66 doenças e classificadas em 14 categorias de sistemas corporais. Com relação ao conhecimento etnobotânico entre diferentes gerações, os resultados mostraram que as pessoas mais velhas conhecem mais espécies, assim como indicam uma maior quantidade de usos para elas.

At the beginning is diploma thesis focused on a distribute power line parameters measurement and examination changes of this parameters depending on using of various power line cables. On the basis of measurements is made a transmission channel in Matlab & Simulink, where are executed simulations with power transmission line. The simulated power line is based on measured distribute parameters or physical proportions of cabels. By changing different parts of simulated communication channel is a symbol error rate expressed on the lenght of transmission line.