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5.4pt;mso-para-margin:0in;mso-para-margin-bottom:.0001pt;mso-pagination:widow-orphan;font-size:11.0pt;font-family:"Calibri","sans-serif";mso-ascii-font-family:Calibri;mso-ascii-theme-font:minor-latin;mso-fareast-font-family:"Times New Roman";mso-fareast-theme-font:minor-fareast;mso-hansi-font-family:Calibri;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:"Times New Roman";mso-bidi-theme-font:minor-bidi;}</style><![endif]-->U tezi se razmatra kriterijum optimalnosti stohastičkog fleš A/D konvertora (SFADC) koji predstavlja osnovu stohastičke digitalne metode merenja (SDMM). Razvijen je matematički i simulacioni model višebitnog SFADC i određen optimum broja bita rezolucije. Napravljen je hardverski prototip 4-bitnog stohastičkog mernog instrumenta (SMI), koji je ispitan brojnim eksperimentima i upoređen sa teorijski određenim vrednostima performansi merenja. Hipoteza ove teze &ndash; da postoji optimalni broj bita rezolucije SMI pri kome se ostvaruje maksimalna dobit u preciznosti merenja po ceni dupliranja potrebnog hardvera &ndash; potpuno je potvrđena.</p> / <p><!--[if gte mso 9]><xml> <w:WordDocument> <w:View>Normal</w:View> <w:Zoom>0</w:Zoom> <w:TrackMoves/> <w:TrackFormatting/> <w:PunctuationKerning/> <w:ValidateAgainstSchemas/> <w:SaveIfXMLInvalid>false</w:SaveIfXMLInvalid> <w:IgnoreMixedContent>false</w:IgnoreMixedContent> <w:AlwaysShowPlaceholderText>false</w:AlwaysShowPlaceholderText> <w:DoNotPromoteQF/> <w:LidThemeOther>EN-US</w:LidThemeOther> <w:LidThemeAsian>X-NONE</w:LidThemeAsian> <w:LidThemeComplexScript>X-NONE</w:LidThemeComplexScript> <w:Compatibility> <w:BreakWrappedTables/> <w:SnapToGridInCell/> <w:WrapTextWithPunct/> <w:UseAsianBreakRules/> <w:DontGrowAutofit/> <w:SplitPgBreakAndParaMark/> <w:DontVertAlignCellWithSp/> <w:DontBreakConstrainedForcedTables/> <w:DontVertAlignInTxbx/> <w:Word11KerningPairs/> 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Normal";mso-tstyle-rowband-size:0;mso-tstyle-colband-size:0;mso-style-noshow:yes;mso-style-priority:99;mso-style-qformat:yes;mso-style-parent:"";mso-padding-alt:0in 5.4pt 0in 5.4pt;mso-para-margin:0in;mso-para-margin-bottom:.0001pt;mso-pagination:widow-orphan;font-size:11.0pt;font-family:"Calibri","sans-serif";mso-ascii-font-family:Calibri;mso-ascii-theme-font:minor-latin;mso-fareast-font-family:"Times New Roman";mso-fareast-theme-font:minor-fareast;mso-hansi-font-family:Calibri;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:"Times New Roman";mso-bidi-theme-font:minor-bidi;}</style><![endif]--><span style="font-size:9.0pt;mso-bidi-font-size:10.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-font-kerning:10.0pt;mso-ansi-language:EN-US;mso-fareast-language:EN-US;mso-bidi-language:AR-SA">The thesis considers the criterion of optimality of the stochastic flash A/D converter (SFADC), which is the basis of the stochastic digital measurement method (SDMM). The mathematical and simulation model of the multibit SFADC was developed and the optimal number of bits of resolution was determined. A hardware prototype of a 4-bit stochastic measuring instrument (SMI) was made, tested in numerous experiments and compared with theoretically determined measurement performance values. The hypothesis of this thesis - that there is an optimal number of SMI resolution bits in which the maximum benefit of the measurement precision is achieved at the price of duplication of the required hardware - is fully confirmed</span></p>

Diese Dissertation untersucht motorische und kognitive Leistungen in der Kindheit am Beispiel des Erlernens einer sportlichen Fertigkeit. Dafür wurde eine Methode zur Messung mentaler Vorstellungen von Bewegungen bei Vorschulkindern entwickelt. Diese basiert auf dem Prinzip räumlicher Verdeckung. Es wurden damit sowohl verschiedene kognitive Leistungen wie die Wahrnehmung und Vorstellung von Bewegungen miteinander verglichen als auch in Beziehung zum Bewegungslernen gesetzt. Außerdem wurde in einer quasi-experimentellen Studie u.a. der Einfluss von Erfahrung, Geschlecht und Versuchsbedingung auf Wahrnehmungs- und Vorstellungsleistungen per Experten-Novizen-Paradigma untersucht. Es wurde geschlussfolgert, dass die Methode hinsichtlich des Geschlechts auch in jungen Jahren differenziert. Das bedeutet, dass Mädchen und Jungen im Vorschulalter möglicherweise unterschiedlich bei der Lösung der Aufgaben vorgehen. Damit kann die Methode - im Gegensatz zur Methode der Mentalen Rotation - auch für die Diagnostik von Vorstellungen von Bewegungen ab einem Alter von 4 Jahren eingesetzt werden.

<p>Дисертација истражује утицај примене дитерског сигнала (дискретног аналогног униформног шума) генерисаног новом методом на повећање ефективне резолуције мерних инструмената базираних на стохастичкој дигиталној мерној методи. У дисертацији је дат преглед досадашњих решења базираних на стохастичкој дигиталној мерној методи у циљу сагледавања потребе и оправданости истраживања. Предложено решење представља комбинацију псеудослучајног и истински случајног генератора и као такво задржава најбоље особине из обе области. Дaт je прeдлoг нoве методе гeнeрисaњa шумa унифoрмнe рaспoдeлe aмплитудa. Умeстo уoбичajeнoг нaчинa гeнeрисaњa кoришћeњeм гeнeрaтoрa псeудoслучajних брojeвa и Д/А кoнвeртoрa, oвдe сe прeдлaжe гeнeрисaњe зaснoвaнo нa нeунифoрмнoм одабирању тeстeрaстoг или троугаоног нaпoнa. Oсим уштeдe збoг нeкoришћeњa Д/А кoнвeртoрa, дoбит je и мoгућнoст гeнeрисaњa нaпoнa из кoнтинуалнoг, умeстo дискрeтнoг скупa aмплитудa. Вeћинa дaнaшњих хaрдвeрских гeнeрaтoрa псeудoслучajнoг нaпoнa, сe бaзирa нa употреби микрoкoнтрoлeра и Д/A кoнвeртoра, пa je нa тaj нaчин рeзoлуциja гeнeрисaњa псeудoслучajнoг нaпoнa oгрaничeнa резолуцијом Д/A кoнвeрторa. Одабирањем тестерастог или троугаоног напона предложеном методом се остварује готово неограничена резолуција. Употреба овако генерисаног дитерског сигнала доводи до повећања ефективне резолуције код стохастичких мерних инстурмената. Симулацијом је одређена оптимална структура генератора на основу предложене методе. Експериментална мерења су изведена помоћу развијеног прототипа хардверског генератора.</p> / <p>Disertacija istražuje uticaj primene diterskog signala (diskretnog analognog uniformnog šuma) generisanog novom metodom na povećanje efektivne rezolucije mernih instrumenata baziranih na stohastičkoj digitalnoj mernoj metodi. U disertaciji je dat pregled dosadašnjih rešenja baziranih na stohastičkoj digitalnoj mernoj metodi u cilju sagledavanja potrebe i opravdanosti istraživanja. Predloženo rešenje predstavlja kombinaciju pseudoslučajnog i istinski slučajnog generatora i kao takvo zadržava najbolje osobine iz obe oblasti. Dat je predlog nove metode generisanja šuma uniformne raspodele amplituda. Umesto uobičajenog načina generisanja korišćenjem generatora pseudoslučajnih brojeva i D/A konvertora, ovde se predlaže generisanje zasnovano na neuniformnom odabiranju testerastog ili trougaonog napona. Osim uštede zbog nekorišćenja D/A konvertora, dobit je i mogućnost generisanja napona iz kontinualnog, umesto diskretnog skupa amplituda. Većina današnjih hardverskih generatora pseudoslučajnog napona, se bazira na upotrebi mikrokontrolera i D/A konvertora, pa je na taj način rezolucija generisanja pseudoslučajnog napona ograničena rezolucijom D/A konvertora. Odabiranjem testerastog ili trougaonog napona predloženom metodom se ostvaruje gotovo neograničena rezolucija. Upotreba ovako generisanog diterskog signala dovodi do povećanja efektivne rezolucije kod stohastičkih mernih insturmenata. Simulacijom je određena optimalna struktura generatora na osnovu predložene metode. Eksperimentalna merenja su izvedena pomoću razvijenog prototipa hardverskog generatora.</p> / <p>The dissertation investigates the impact of the application of the dithering signal (discrete analogue uniform noise) generated by the new method for increasing the effective resolution of measurement instruments based on the stochastic digital measurement method. The dissertation provides an overview of the existing solutions based on the stochastic digital measurement method in order to understand the need and justification of the research. The proposed solution represents a combination of a pseudorandom and truly random generator and as such holds the best features in both areas. А suggestion of a new way of generating the noise of the uniform distribution of amplitudes is presented. Instead of the usual way of generating using a pseudorandom number generator and a D/A converter, the generation based on the nonuniform sampling of sawtooth or triangle voltage is proposed. In addition to the savings due to the non-use of a D/A converter, the possibility of generating voltages from a continual instead of a discrete amplitude set is also obtained. Most of today&#39;s hardware pseudorandom voltage generators are based on the use of a microcontroller and D/A converter, so in this way the resolution of the pseudorandom voltage generation is limited by the resolution of the D/A converter. By sampling the sawtooth or triangle voltage using the proposed method, almost unlimited resolution is achieved. The use of this generated dither signal leads to an increase in effective resolution in stochastic measuring instruments. The simulation determined the optimal structure of the generator based on the proposed method. Experimental measurements were made using developed hardware.</p>

<p dir="ltr">Tip leakage flows in unshrouded turbines lead to significant pressure losses and heat loads, both on the rotating blades and the adjacent casing surface. These penalties are influenced by the tip clearance size, highly pertinent to the new generation of small-core high-speed turbines. Tailored to decrease tip leakage effects, small-core turbines feature running clearances below 0.3mm, making small blade-to-blade clearance variations extremely relevant for the machine's performance. Therefore, tip clearance monitoring and assessment of the leakage flow structures are paramount to design strategies for this class of turbines. Due to the limitations of commercially available CFD tools to accurately resolve highly detached unsteady flows, in-situ empirical observations are required. Furthermore, the documentation of flow field relationships with the tip clearance is highly valuable for in-service engine applications, such as tip clearance estimations from more accessible measurements to provide feedback for clearance control systems.</p><p dir="ltr">The dissertation developed hereafter performs aerothermal measurements in the casing end wall of a small-core high-speed turbine at engine-representative conditions and a wide range of clearance values. A novel in-situ calibration procedure for capacitance probes is tailored to reduce the required clearance measurements and the experimental time. Its uncertainty analysis demonstrates improved prediction bands, supporting this method for tight clearance measurements. A thorough evaluation of the casing static pressure is performed with high-frequency miniature pressure transducers. Specific trends are identified with independent variations of operating pressure ratio, rotational speed, and tip clearance. The results revealed the existence of a clearance-dependent threshold rotational blade tip Reynolds, where the circumferential directionality of tip leakage flows reverses. The analysis of the convective heat flux field with varying operating parameters was achieved with Atomic Layer Thermopile sensors. The computed adiabatic parameters and unsteady contributors reveal high influence of the temperature field on the convective heat flux mechanisms. Lastly, the evaluation of the unsteady terms with tip clearance unveil the shift of thermal loads from the pressure to the suction side of the blade tip.</p><p dir="ltr">The achieved results have provided valuable insight into the underlying aerothermal mechanisms governing the tip clearance region, as well as connections with tip clearance size that could potentially be implemented on engine application systems.</p>

Visual Simultaneous Localisation and Mapping (SLAM) is concerned with simultaneously estimating the pose of a camera and a map of the environment from a sequence of images. Traditionally, sparse maps comprising isolated point features have been employed, which facilitate robust localisation but are not well suited to advanced applications. In this thesis, we present map representations that allow a more dense description of the environment. In one approach, planar features are used to represent textured planar surfaces in the scene. This model is applied within a visual SLAM framework based on the Extended Kalman Filter. We presents solutions to several challenges which arise from this approach.

This master’s thesis describes various principles of measurement of electromagnetic waves in a free space and on a line. Used sensors and their real parameters are given for every method. The analysis of protections of high-frequency inputs of measuring instruments is done here and the most suitable method and protections of input for realization are chosen. The analysis of design of secondary protection of high-frequency input is done in this project. The protection of input is realized and measured. The suitable method of measurement is chosen as well as the sensor for measurement of power. The block diagram and circuit diagram of the meter of power are designed. According to designed conception the measuring instrument for measurement of power is realized and its single qualities are measured during the realization. In the final part its precision is measured and the evaluation of results is done.

Visual Simultaneous Localisation and Mapping (SLAM) is concerned with simultaneously estimating the pose of a camera and a map of the environment from a sequence of images. Traditionally, sparse maps comprising isolated point features have been employed, which facilitate robust localisation but are not well suited to advanced applications. In this thesis, we present map representations that allow a more dense description of the environment. In one approach, planar features are used to represent textured planar surfaces in the scene. This model is applied within a visual SLAM framework based on the Extended Kalman Filter. We presents solutions to several challenges which arise from this approach.