Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 15 of 15 for “"Amplitude Ratio"”.
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Towards Ultra-High Resolution Mode-localised MEMS Sensors
… such as displacement, charge, mass, and acceleration. However, practical aspects of developing a sensor starting from design of a closed-loop implementation to understanding different operating regions with the aim of resolution analysis and noise optimisation have yet to be explored in depth. …
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Quantifying tympanic membrane dynamics in otitis media using low coherence interferometry
… was developed with automated pressure generation. The pneumatic LCI system developed during this research measures the TM displacement with an axial resolution of around 6.5 μm, and provides simultaneous pressure measurement in the ear canal with a temporal resolution of 1 msec. To …
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Stress tensor estimates derived from focal mechanism solutions of sparse data sets: applications to seismic zones in Virginia and eastern Tennessee
… preserving fit to the original polarity and amplitude ratio data, and (2) the differences between the observed and theoretical fault slip is used as a weighting scheme for the results of the tensor estimation. Other methods, which rotate the single observed focal mechanism solution from its …
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Analysis of early auditory evoked potentials elicited by stimuli with directional information
… the residual noise and the signal-to-noise ratio of an evoked potential is demonstrated. In chap. 3 it is shown that the amplitudes of ABRs and BDs rather correspond to the lateralization of the stimuli than to the interaural parameters. Chap. 4 deals with the dipole source analysis of …
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The measurement of oxygen uptake kinetics in children
… V02 KINETICS in the frequency domain in terms of amplitude ratio and phase delay over the frequency range of 2.2-8.9mHz. At each of the frequencies assessed amplitude ratio was higher in children (P<0.001) than in either of the adult groups. Phase delay was also significantly shorter in children …
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Design of segmental rotor and non-overlap windings in single-phase fefsm for low torque high speed applications
… refinement. The balanced armature magnetic flux amplitude ratio obtained is 1.002, almost 41.2% reduction from the initial design. In addition, the optimized motor has increased maximum torque and power by 80.25% to 1.65 Nm, and 43.6% to 398.6W, respectively. Moreover, copper loss of the …
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An investigation of the dynamic stalling characteristics of rotating axial-flow compressor blades
… of the compressor rotor row as an amplitude ratio and a phase shift of the Fourier frequency components of the total pressure loss distribution. This transfer function representation of the dynamic characteristics of the blade row provides important advantages over previous …
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Natural frequencies evaluation on existing reinforced concrete bridges using microtremor testing
… loadings into their structural design consideration. Structure constructed without the consideration of seismic design is generally more vulnerable to ground shaking during seismic event. Even though Malaysia is located on the stable Sunda shelf with low to medium seismic activity level, …
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MEMS MULTI-DOF WEAKLY COUPLED RESONATOR BASED ON MODE LOCALIZATION FOR MASS CHANGE SENSING APPLICATIONS
… It has been demonstrated that a) the resonance amplitude ratio yields a sensitivity to mass changes around two times larger than amplitude change and around two orders of magnitude larger than frequency shift in air and b) nanoparticles as mass perturbation to characterize the MEMS mass sensors …
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Interfacial properties of fluid phases in two dimensions and of three-component surfactant systems
… temperature is determined by a critical amplitude ratio. In our computer simulation study of this problem, the interfacial thickness between two two-dimensional Lennard-Jones fluid phases is determined by using the method of molecular dynamics. Within statistical uncertainty, the results …
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FUSING GEDI LIDAR AND TANDEM-X INSAR OBSERVATIONS FOR IMPROVED FOREST STRUCTURE AND BIOMASS MAPPING
… extinction coefficient (σ) and ground-to-volume amplitude ratio (µ) – were made. Using an external DTM derived from simulated GEDI lidar data, RVoG model was used to calculate spatially varied σ values and derived forest heights with better accuracy. TDX forest height estimation was further …
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Bayesian source inversion of microseismic events
… This approach is developed for polarity and amplitude ratio data, although it is possible to use any data type, provided the noise model can be estimated. The resultant posterior probability distributions are easily visualised on different plots for orientation and source-type. Several …
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Design and Implementation of Mode Localised Resonant MEMS Oscillators for Gravimetric Sensing
… Systems (MEMS) Technology. Integration of miniature electrical and mechanical components fabricated using integrated circuit batch processing techniques is achievable utilising MEMS Technology. As a result, MEMS devices have witnessed exponential growth over the last decade in …
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Investigation of the Dynamic Performance of a Cable-Stayed Footbridge
… can be provided by passive dampers. However, amplitude dependent behaviour of dampers and slip in connections can make them effective only above a threshold amplitude. Hence, due to high uncertainties in the complex CSFB-damper system, usually, dynamic tests are performed to investigate the …
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The Hydrodynamic and Estuarine Physics Of Maketu Estuary
… tidal prism decreases below 255,000 m³. A Ω/Mₜₒₜ ratio of - 25 classifies Maketu inlet as a "barbypasser" having positional stability, with an estimated increase of the ebb shoal volume of - 17% in comparison to 1985. Three tide gauge stations were established within the estuary to provide …