Dissertations / Theses on the topic 'Pitch dimensions'
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Gerdsen, Willy. "Investigating suitable pitch sizes for young football players in New Zealand." Click here to access this resource online, 2008. http://hdl.handle.net/10292/399.
Full textZhen, Yi. "Numerical Simulation of Dropped Cylindrical Objects into Water in Two Dimensions (2D)." ScholarWorks@UNO, 2018. https://scholarworks.uno.edu/td/2568.
Full textChoudhury, Abhishek. "Chip-last embedded low temperature interconnections with chip-first dimensions." Thesis, Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/37104.
Full textEmmert, Antonia C. "Visual and proprioceptive inputs on spatial orientation in the pitch dimension." Thesis, Monterey, California. Naval Postgraduate School, 1989. http://hdl.handle.net/10945/27334.
Full textOlds, Shana D. "Modeling and LQR Control of a Two-Dimensional Airfoil." Thesis, Virginia Tech, 1997. http://hdl.handle.net/10919/36668.
Full textMaster of Science
Wang, Tianyu Tom. "Exploiting pitch dynamics for speech spectral estimation using a two-dimensional processing framework." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/43067.
Full textIncludes bibliographical references (p. 133-135).
This thesis addresses the problem of obtaining an accurate spectral representation of speech formant structure when the voicing source exhibits a high fundamental frequency. Our work is inspired by auditory perception and physiological modeling studies implicating the use of temporal changes in speech by humans. Specifically, we develop and evaluate signal processing schemes that exploit temporal change of pitch as a basis for high-pitch formant estimation. As part of our development, we assess the source-filter separation capabilities of several two-dimensional processing schemes that utilize both standard spectrographic and auditory-based time-frequency representations. Our methods show quantitative improvements under certain conditions over representations derived from traditional and homomorphic linear prediction. We conclude by highlighting potential benefits of our framework in the particular application of speaker recognition with preliminary results indicating a performance gender-gap closure on subsets of the TIMIT corpus.
by Tianyu Tom Wang.
S.M.
Starr, Gary Earl. "Auditory short-term memory timbre and pitch : interference effects from grouping and same-dimension similarity /." The Ohio State University, 1996. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487940308433416.
Full textRamachandran, Koushik. "Conductive anodic filament reliability of fine-pitch through-vias in organic packaging substrates." Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/50228.
Full textChannon, Scott William. "One and two dimensional studies of the collisionless large Larmor radius Z pinch." Thesis, Imperial College London, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.326160.
Full textHonrao, Chinmay. "Fine-pitch Cu-snag die-to-die and die-to-interposer interconnections using advanced slid bonding." Thesis, Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/50333.
Full textOljelund, David. "Dimensionering och konstruktion av passiv mekanisk pitch för småskaliga horisontalaxlade vindkraftverk." Thesis, Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-42348.
Full textFor small-scale wind turbines, there are mainly two ways of reducing loads at high wind speeds, stall regulation and yaw the rotor out of wind. A third method is to pitch the rotor blade to a smaller angle of attack. This reduces the load on the rotor blade while maintaining power generation. The following work presents a design for a spring based passive mechanical pitch that is limited to only dimensioning a torsion spring and three bearings. The design is aimed at horizontal axis wind turbines with three rotor blades with a rotor diameter up to 20m. An ideal rotor blade is mathematically modeled to produce the forces and torques needed in order to properly dimension the torsion spring and bearings. The design shows that the load of the rotor blade can be reduced and that forces connected to the power can be kept more or less constant for wind speeds 16 to 24 m / s. The results of sizing show that both the torsion spring and bearings can be adapted to different shaft diameters relatively easy. The conclusions are that if dimensioning is done according to the presented results, it is possible, at least in theory, to achieve the desired behaviour. For further development and verification it is recommended to do real tests for the torsion spring to determine its precision due to small angle displacement in the spring.
Prince, Jonathan. "The Integration of Pitch and Time in Music Perception." Thesis, 2009. http://hdl.handle.net/1807/19076.
Full text李夏吉. "Investigations of Flowfield Characteristics Upon Two-Dimensional Airfoil Oscillating in Pitch." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/00651387998751889451.
Full text國立中興大學
機械工程研究所
83
The flow structure over an NACA0012 airfoil oscillating sinusoidally in pitch will be investigated experimentally in a recirculation water channel. It is intended to understand the insight of hte flow physics and characteristics of the perturbed shear layer leading to higher lift at post-stall angle of attack. Flow visualizations are performed by hydrogen bubbles as well as the laser sheet methods; moreover, velocity informations are acquired by LDV system through phase-averaged technique. The evolution of small scale vortices in perturbed shear layer leading to coalescence and formation of large scale vortex above but closer to the airfoil. Neverthless, appropriate perturbation at the leading edge would lead to the most effective separation control when the forcing frequency matched with the subharmonic of the Klevin-Helmholtz shear layer instability frequency. Consequently, the significant improvements of pressure distribution on the upper surface are achieved in the post-stall angle of attack.
Pan, Jiun-Hung, and 潘俊宏. "Densification of Two-Dimensional Carbon/Carbon Composites by Impregnation of Petroleum Pitch." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/16990148211941712317.
Full text大同大學
材料工程研究所
88
Carbon/carbon composites, carbon fibers reinforced carbon matrix composites, are unique materials which combine the excellent mechanical properties of carbon fibers and the characteristics of graphitized carbon matrix. Carbon/carbon composites possess high specific strength and stiffness, excellent high temperature mechanical properties, low thermal expansion, high vibration damping capability, good wear resistance, good anti-corrosion, and well biocompatibility. Therefore, applications were found as high temperature structure materials, refractory materials, brakes and biomedical materials, for example, the nozzle of aerospaceplane, heat-resisting brick of high temp furnace, brake lining for high speed vehicles, and joint replacements. The decomposition and shrinkage of phenolic resin matrix results in a lot of cracks and pores in the carbonized composites. For this reason, densification by pitch impregnation/carbonization cycles was studied in this investigation. The variations of density, open porosity, and pore size distribution after each densification cycle were measured using mercury porosimetry and Archimedes’ method. The mechanical behavior after densification was investigated using three-point bending test. Four densification cycles were performed, and bulk density and flexural strength were found to increase gradually after each densification cycle. On the other hand, open porosity decreased significantly. Better flexural strength was obtained after one densification cycle. When a lower temperature increase rate of carbonization was used. However, a flexural strength lower than that before densification was obtained when using a higher carbonization rate. The reasons were probably due to the incomplete carbonization and generation of new cracks during recarbonization for a higher carbonization rate. It was also found that the composites could be densified more efficiently when adding an intermediate graphitization between densification cycles. As a result, a much higher flexural strength was also measured.
Shoko, Lay. "Effects of the chemical composition of coal tar pitch on dimensional changes during graphitization / Lay Shoko." Thesis, 2014. http://hdl.handle.net/10394/12261.
Full textPhD (Chemistry), North-West University, Potchefstroom Campus, 2014
Liu, Tsian-Hsing, and 劉燦興. "The Measurements of Variable pitch screw on 5-Axis machine and three-dimensional coordinate mearsuring machine." Thesis, 1995. http://ndltd.ncl.edu.tw/handle/34212261005482185684.
Full text國立成功大學
機械工程研究所
83
This thesis presents an analytical methodology on the NC data eneration for automation measurement of variable pitch lead screw on coordinate measuring machine and mutli-axis machine tools.he desired probe location and the ability functions of 4-axisMM and two multiaxis machine tools are derived by a modified notation. NC data equations are obtained by solving the machine''sink variables through equations of its ability function and theesired probe location matrices.This methodlogy is a general onend is applicable for various mechanical element measuring. Itlso combines the activities of design and quality control, thusaking the production process more flexible, automatic and controllable.