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Narayanan, Soundararajan Hari. "Torque transducer sensitivity study." Thesis, KTH, Maskinkonstruktion (Inst.), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-183048.
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A torque transducer or a torque sensor is a device for measuring and recording the torque on a rotating system. Torque transducers usually employ strain gauges to measure the torsional moment applied to a rotating shaft.It is to be noted that for an ideal torque transducer, it should measure only the strain that is caused by a torque. Strain due to bending load should be compensated as per the Wheatstone bridge arrangement. However, because of geometrical tolerances and assembly errors, the compensation doesn’t occur and the measured strain is a resultant of bending loads and axial loads which are undesired to measure the torque associated with the system. An analytical formulation has been developed using Matlab and this thesis gives the generalized indication of the strain due to all the associated loads. The user shall also entire the region where the strain needs to be computed and this knowledge can be useful for placing the strain gauges in the shaft accordingly. Initially, the formulation is based on a standard Torque Transducer used at Atlas Copco and then, a generalized result has been developed. The theoretical formulation is verified using the ProEngineer Mechanica software. The end user shall enter the different loads (if any) along with the geometrical tolerance values and the output will be an indication of the strain at point, strain at a region and sensitivity. The main intention of the thesis is to create a better understanding of the strain associated with the twisting, bending and axial loads and also the geometrical imperfections. The user can also make a decision on the location of strain gauges on a shaft for maximum accuracy. Finally, the differences in error from different possible configurations are compared and a conclusion has been made based on factorial design pertaining to design of experiments.Momentgivare är små sensorer som används för att mäta och registrera vridmomentet på en roterande axel. Momentgivare baseras vanligtvis på trådtöjningsmätare för att mäta vridmomentetet kring axeln de är fixerade på. Det skall noteras att en ideal momentgivare endast bör mäta den yttöjning som uppkommer på grund av ett vridmoment. Den belastning som uppkommer på grund av axelns böjning kompenseras bort med hjälp av en Wheatstonebrygga. Men på grund av geometriska toleranser och monteringsfel kan kompensationen bli felaktig och då påverkas det uppmätta momentet även av böj och axialbelastningar vilket är oönskat. En analytisk modell har utvecklats med hjälp av Matlab och denna rapport undersöker de olika lastfallens bidrag till momentfelet. Användaren kan ange området där yttöjningen skall beräknas och utifrån de beräkningarna bestämma var trådtöjningsgivarna bör placeras. Inledningsvis är beräkningarna baserade på en av Atlas Copcos momentgivare och sedan har generaliserade resultat utvecklats. De teoretiska beräkningarna verifieras med hjälp av programmet ProEngineer Mechanica. Användaren kan ange vilka belastningar som axeln känner samt de geometriska toleransvärdena och modellen beräknar då ytspänningen för den valda regionen. Det huvudsakliga syftet med denna avhandling är att skapa en bättre förståelse av ytspänningen som uppkommer på grund av vridning, böjning och axiella belastningar och även geometriska imperfektioner. Modellen kan också användas för att göra beräkningar som visar var töjningsgivare bör placeras på axeln för maximal precision. Slutligen har de introducerade felet från de olika möjliga konfigurationerna jämförts och en slutsats har dragits baserat på faktorförsök.
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Standfuss, S. "Sensitivity study of HLFC nacelles." Thesis, Cranfield University, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.427135.
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Patterson, Paula K. "Effect of study abroad on intercultural sensitivity." Diss., Columbia, Mo. : University of Missouri-Columbia, 2006. http://hdl.handle.net/10355/4422.
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Thesis (Ed. D.) University of Missouri-Columbia, 2006.The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on August 7, 2007) Includes bibliographical references.
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Teo, Chee Kong. "Sensitivity Study of a Truck Chassis." MSSTATE, 2002. http://sun.library.msstate.edu/ETD-db/theses/available/etd-10292002-201029/.
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In response to an increasingly demand for fuel-economy, more weight reduction techniques have been proposed to create an optimum vehicle chassis. Material selection and design modification are two of the vital techniques being investigated. In addition, ample attention has been dedicated towards improving the overall strength of a vehicle chassis. Specifically, the overall objective of this study is to maximize weight savings in a truck chassis, while improving its strength characteristics.
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Tamura-Wicks, Helen. "Sensitivity study of Caspian sea ice." Thesis, Imperial College London, 2015. http://hdl.handle.net/10044/1/30644.
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The Northern Caspian lies along the southern-most boundary within the Northern Hemisphere where sea-ice forms. Although ice cover is typically observed between November and March, it experiences high spatio-temporal variabilities. This variability may be of interest in the long-term as it may act as an early indicator of large-scale climate change, as well as being an area of interest to industries and vulnerable species. Through empirical and model studies, this thesis carries out a sensitivity study of Caspian sea-ice for the first time. Caspian sea-ice concentration from satellite passive microwave data and surface daily air temperatures are analysed from 1978 to 2009. Relationships between mean winter air temperatures, cumulative freezing degree days (CFDD) and the sum of daily ice area are found for the first time. Mean monthly air temperatures of less than 5.5-9.5°C, and a minimum CFDD of 3.6-11.2°C, is required for ice formation in the Northern Caspian. Examination of climate projections from multi-model ensembles of monthly mean air temperatures suggest for the first time that the Northern Caspian may be largely ice-free by 2100 for the highest emission scenario. An ocean-ice-atmosphere model of the Caspian shows weak sensitivities of the minimum CFDD to varied sea-ice albedo and ice compressive strength. Sea level decline reduces the minimum CFDD and promotes formation of higher concentration ice. An atmosphere model of the Caspian is run with observed 2006 to 2009 sea-ice cover, with an additional run without ice cover, to quantify the sensitivity of the atmosphere to sea-ice for the first time. Ice cover removal results in up to 5-10% increase in precipitation, surface wind speeds and humidity, with up to 3°C increase in surface temperature, in the December-January-February climatology over the Northern Caspian. Additionally, extreme precipitation and extreme wind speeds intensify and extreme cold air events weaken with ice removal.
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Sanderson, Kristin Alayne. "Planting the seeds of environmental sensitivity using children's literature." CSUSB ScholarWorks, 2005. https://scholarworks.lib.csusb.edu/etd-project/2805.
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This project is aimed at helping children in elementary grades 1-6 develop a deep awareness of and empathy for the environment through children's fictional literature. This project takes a selection of children's books that encourage feelings of love, respect, and concern for the environment, and pairs them with an array of activities that put children more in touch with our planet and its problems. This combination of shared stories and related activities may be influential in developing environmental sensitivity in young children.
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Juhlin, Magnus. "A study on crosswind sensitivity of buses /." Stockholm : Department of Aeronautical and Vehicle Engineering, Royal Institute of Technology, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4084.
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Williams, Vincent Troy. "An Experimental Study of Distance Sensitivity Oracles." Scholar Commons, 2010. http://scholarcommons.usf.edu/etd/3697.
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The paper \A Nearly Optimal Oracle for Avoiding Failed Vertices and Edges" by
Aaron Bernstein and David Karger lays out a nearly optimal algorithm for nding the
shortest distances and paths between vertices with any given single failure in constant
time without reconstructing the oracle. Using their paper as a guideline, we have
implemented their algorithm in C++ and recorded each step in this thesis. Each step
has its own pseudo-code and its own analysis to prove that the entire oracle construction
stays within the stated running time and total space bounds, from the authors. The
effciency of the algorithm is compared against that of the brute-force methods total
running time and total space needed. Using multiple test cases with an increasing
number of vertices and edges, we have experimentally validated that their algorithm
holds true to their statements of space, running time, and query time.
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Blomberg, Joel. "Sensitivity study of control rod depletion coefficients." Thesis, Uppsala universitet, Tillämpad kärnfysik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-256092.
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This report investigates the sensitivity of the control rod depletion coefficients, Sg, to different input parameters and how this affects the accumulated 10B depletion, β. Currently the coefficients are generated with PHOENIX4, but the geometries can be more accurately simulated in McScram. McScram is used to calculate Control Rod Worth, which in turn is used to calculate Nuclear End Of Life, and Sg cannot be generated in the current version of McScram. Therefore, it is also analyzed whether the coefficients can be related to CRW and thus be studied indirectly through it. Simulations of the coefficients were done in PHOENIX4, simulations of CRW were done in both PHOENIX4 and McScram and simulations of β were done in POLCA7. All simulations were performed for a CR99 in a BWR reactor. The control rod coefficients were found to be sensitive to the enrichment of the fuel, void fraction of the water and the width of the gap, and these effects were also seen in the results of β. As a result, one of three steps could be taken. First, the parameter values should not be set arbitrarily, instead default values could be chosen such that Sg is calculated more accurately. Second, a set of tables of Sg could be generated for different parameter values so that β can be calculated with Sg from the current conditions, although this would mean that PHOENIX4 needs to be updated. Third, McScram can be updated to be able to calculate Sg directly. It has been concluded that Sg cannot be studied indirectly through CRW since the trends and the sensitivity to the different parameters were not consistent between Sg, CRW calculated with PHOENIX4 and CRW calculated with McScram, where PHOENIX4 was more sensitive than McScram. The results can instead be used to bench-mark the PHOENIX4 results.
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Bugnion, Véronique. "Driving the ocean's overturning : an adjoint sensitivity study." Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/58366.
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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 2001.Includes bibliographical references (p. 183-193).
The focus of this thesis is the sensitivity of the strength of the meridional overturning circulation to surface forcing and mixing on climatological time scales. An adjoint model is used to gain new insights into the spatial characteristics of the sensitivity patterns. Adjoint models provide the sensitivity of a diagnostic, often called cost function, to all model parameters in a single integration. In contrast, traditional sensitivity analyses are performed by repeated integrations of the so-called "forward" model, perturbing slightly the value of a single parameter at each integration. The results of the adjoint model allows us to calculate global maps of sensitivity. These maps provide a geographic picture of where on the ocean heat and freshwater flux, wind stress and diapycnal mixing perturbations in the North Atlantic are likely to have the greatest impact on the meridional overturning and its heat transport. The adjoint model provides clear identification of the physical mechanisms which can influence the meridional overturning on times scales of years to decades. Boundary and equatorial Kelvin waves and equatorially trapped Rossby waves carry information around the boundaries of the basin and across the equator in less than a decade for a basin of the size of the Atlantic. Advection of buoyancy perturbations has an important influence on the meridional overturning on the decadal time scale. Diffusion is important in determining the final equilibrated state of the meridional overturning on the centennial scale. The role of diapycnal mixing in determining the overturning's strength is confined to regions near the lateral boundaries in the Northern hemisphere and to the tropical region in both hemispheres. The important role played by the tropics in setting the overturning's strength seems to confirm the thermodynamic principles outlined by Sandstrom (1908), Jeffreys (1925) and Munk and Wunsch (1998): upward advection of heat is balanced by downward diffusion. The strength of the meridional overturning is then determined by the power available to return the fluid to the surface across the ocean's stratification. Because the ocean is most strongly stratified in the tropics, the mixing process is most efficient in that region. Along the eastern boundary in the extratropics, the importance of diapycnal mixing is confined to a shallow layer at the base of the thermocline. The large vertical temperature contrast between the western and deep western boundary currents induces efficient mixing in that region. Surface wind stress has two effects on the ocean's stratification which concentrate the sensitivity in the eastern equatorial region. Ekman suction increases the stratification along the equator while Ekman pumping decreases it in the rest of the tropics. The equatorial easterlies lift the thermocline on the eastern side of the basin, further increasing the stratification and the efficiency of the vertical mixing process in that region. These processes are similar in the results from a coupled model. Atmospheric feedbacks do, however, allow vertical mixing in the Pacific to play a role as important as mixing in the Atlantic in determining the overturning's strength. The large uncertainties in the global value of the diapycnal mixing in the ocean, estimated here at , KV = 3.10- 5 ± 2.10-5 m2s-1, translate into an uncertainty of approximately 6 Sv in the maximum value of the meridional overturning streamfunction. The role of surface buoyancy forcing on the overturning's strength depends on the formulation of the surface boundary conditions. The sensitivities are confined to high latitudes and the vicinity of convection sites when the surface forcing is prescribed as restoring the sea surface salinity or temperature towards observations. When the forcing is prescribed as have the greatest impact on the meridional overturning. On climatological time scales, it is the uncertainty in the precipitation and evaporation fields in the tropics which have the greatest impact on the uncertainty in the streamfunction, the latter can be estimated at: 'MAX = 29 ± 4 Sv. Over the intermediate time scale of climate change, the overturning is likely to weaken at first because of warming and freshening in high latitudes. It will, however, eventually recover as positive salinity anomalies are advected northwards from the tropics. The sensitivity of the overturning to the wind stress forcing is also dependent on the surface boundary conditions. Under restoring boundary conditions, large positive sensitivities are observed in the Antarctic Circumpolar Channel in a pattern reminiscent of the so-called Drake Passage effect. According to that hypothesis, upwelling of North Atlantic Deep Water takes place predominantly in a branch of the Deacon cell in the Drake Passage region. The importance of wind in the Drake Passage vanishes when the surface buoyancy fields are less tightly constrained, for example in the model forced by mixed boundary conditions or in the coupled model. The Agulhas Plateau, the Chilean coastline and the Indonesian throughflow play an important role in setting the overturning's strength in the ocean model forced by mixed boundary conditions. These "gateways" act as a regulator of the salinity of the Atlantic basin. The wind stress determines the balance between the inflow of relatively salty Indian Ocean water through the Agulhas current, the inflow of fresher Benguela current water southwest of Africa and the flow of very cold and fresh water through the Drake Passage. A wind stress perturbation of ±0.03 N m 2 over the Agulhas Plateau would have a significant impact on the meridional streamfunction's maximum, estimated at MAX = 29t ± 0.5 Sv. Both Drake Passage and gateway effects disappear almost completely in the coupled version of the model, which shows the strongest positive sensitivities to wind stress in the region of equatorial Ekman upwelling. Our study shows that, in a climatological ocean model, the choice of air-sea boundary conditions is crucial in determining the sensitivity of the meridional overturning circulation. The climatology of the forward ocean model is credible and quite similar in all scenarios. However, including interactive atmospheric transports of heat and moisture changes the manner in which the ocean model state adjusts to changes in wind stress, heat flux and diapycnal mixing. Considering the role of both the atmosphere and the ocean when studying the climatological behavior of the MOC is, therefore, clearly important. Models which keep one of the components fixed can lead to very different conclusions from models in which both components are represented.
by Véronique Bugnion.
Ph.D.
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Taber, Victoria L. "Environmental sensitivity study on mine impact burial prediction model." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1999. http://handle.dtic.mil/100.2/ADA361822.
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Thesis (M.S. in Meteorology and Physical Oceanography) Naval Postgraduate School, March 1999."March 1999". Thesis advisor(s): Peter C. Chu. Includes bibliographical references (p. 47-48). Also available online.
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Block, Noah R. "A sensitivity study of a polychromatic sparse-aperture system /." Online version of thesis, 2005. http://hdl.handle.net/1850/7065.
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Johnston, Simon Douglas. "An epidemiological study of serological markers and gluten sensitivity." Thesis, Queen's University Belfast, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.337056.
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Jacamon, Pauline. "Sensitivity study on Duty cycles for Actuator fatigue analysis." Thesis, KTH, Flygdynamik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-203311.
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During the aircraft's ight, the control surfaces that enable the aircraft to perform the required maneuvers and the actuator that control them have to withstand loads. Those loads will a ect the actuators lifetime and that is why it is very important to be able to predict their amplitude in order to make sure the actuators will last long enough and be ecient enough during the aircraft lifetime. Duty cycles are thus computed in order to compute the actuators fatigue severity and endurance criteria. The problem is that during the design of a new aircraft, duty cycles generation is very long process. The aim of this thesis it to predict the evolution of actuators fatigue with respect to design parameters in order to reduce computation time during incremental aircraft design.
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Carvalho, Régis L. "Mechanistic-empirical design of flexible pavements a sensitivity study /." College Park, Md.: University of Maryland, 2006. http://hdl.handle.net/1903/3376.
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Thesis (M.S.) -- University of Maryland, College Park, 2006.Thesis research directed by: Dept. of Civil and Environmental Engineering. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
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Phibbs, Samuel Anthony. "Idealised and regional modelling study on cyclones' sensitivity to temperature." Thesis, Imperial College London, 2016. http://hdl.handle.net/10044/1/57118.
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Idealised tropical and extratropical cyclones, and a historic medicane are simulated using the Coupled-Ocean-Atmosphere-Wave-Sediment Transport Modeling System. This manuscript examines the sensitivity of: surface wind and waves to ocean temperature for tropical cyclones (TCs); precipitation to atmospheric temperature for extra-tropical cyclones; wind, waves and precipitation to simultaneous increases in atmospheric and oceanic temperature for the medicane. More intense and larger TCs, with higher waves, form when ocean temperature is increased. The maximum significant wave height increases more than the maximum wind speed for TCs up to hurricane-force wind. Above hurricane-force wind this relationship is reversed. This is explained by the wind drag coefficient dependence on wind speed. The relative increase in the footprint of high waves is considerably greater than the increase in the maximum wave height as ocean temperature is increased. This suggests a future warmer ocean will result in a large increase in the surface area of damaging waves generated by TCs. For the extratropical cyclones the footprint of extreme precipitation (total surface area where accumulated precipitation exceeds high thresholds) and the accumulation in different sized catchment areas is examined. The footprint of extreme precipitation grows considerably with temperature. When the catchment areas are ranked in order of total precipitation, super Clausius-Clapeyron behaviour of the 99th percentile is found for all the catchment sizes. This surprising result for larger catchment areas is due to spatially concentrated changes in the extreme precipitation. A more intense, significantly larger medicane generally developed when temperatures were increased. The greater area of high winds led to increases in both the maximum significant wave height and the footprint of high waves. The mean and extreme precipitation increased with temperature slightly and substantial faster than Clausius-Clapeyron scaling respectively, this was accompanied by a larger but less fragmented footprint of extreme precipitation.
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Ullestad, Mollie. "University Student Indigenous Intercultural Sensitivity and Short-term Study Abroad." Thesis, University of Missouri - Columbia, 2019. http://pqdtopen.proquest.com/#viewpdf?dispub=13850756.
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There is an extreme underrepresentation of indigenous peoples within American study abroad programs, and student participants rarely gain an authentic experience, awareness, and intercultural sensitivity towards such groups. This case study seeks to address this disparity through the creation of a new geography short-term study abroad program titled, “Resources and Indigenous Peoples of Oceania”, at the University of Missouri. This program is based on providing geographic opportunities for students to experience the diverse physical landscapes of New Zealand and interact with the local Maori indigenous people and their culture. The Developmental Model of Intercultural Sensitivity (DMIS) is used both before and after the study abroad program to measure changes in student participants’ indigenous intercultural sensitivity, as well as student program journal entries and final papers. The goal of this case study is to discover whether or not a study abroad program with a focus on elements of indigenous culture can actually improve students’ intercultural sensitivity towards such groups.
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Izountouemoi, Anna. "Emotional Sensitivity, Emotional Expressivity and Dance expertise: A comparative study." Thesis, Mittuniversitetet, Institutionen för psykologi och socialt arbete, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-41180.
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Shaheen, Stephanie. "The effect of pre-departure preparation on student intercultural development during study abroad programs." Connect to this title online, 2004. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1091481152.
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Thesis (Ph. D.)--Ohio State University, 2004.Title from first page of PDF file. Document formatted into pages; contains viii, 215 p.; also includes graphics. Includes bibliographical references (p. 204-215).
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Miao, Shicong. "A Parametric Study For Panel Buckling Sensitivity Of Composite Sandwich Wind Turbine Blades." University of Dayton / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1323963140.
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Jones, David H. "Membrane receptor sensitivity, a ²H NMR study of signal transduction mechanisms." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape7/PQDD_0014/NQ40267.pdf.
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Egan, Sarah T. "Impulsivity, reward sensitivity and motivations to use ecstasy an integrative study /." Swinburne Research Bank, 2006. http://hdl.handle.net/1959.3/4479.
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Thesis (BA(Hons) (Psychology)) - Faculty of Life and Social Sciences, Swinburne University of Technology, 2006."June 2006". A thesis is submitted in fulfillment of the requirements for the degree Bachelor of Arts (Honours), [Faculty of Life and Social Sciences], Swinburne University of Technology - 2006. Typescript.
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Capp, Alison Jane. "An electrophysiological study of sensitivity control in the vertebrate (fish) retina." Thesis, Imperial College London, 1989. http://hdl.handle.net/10044/1/47374.
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Ekman, Petter. "A Sensitivity Study of Some Numerical and Geometrical Parameters Affecting Lift." Thesis, Linköpings universitet, Mekanisk värmeteori och strömningslära, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-124197.
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Volvo Car Corporation (VCC) uses Computational Fluid Dynamics (CFD) and wind tunnel during the aerodynamic development of new vehicles. In the past VCC main focus has been on the drag force correlation to the wind tunnel measurements but in recent years improved methods for lift force correlations has been highly wanted. Three objectives were considered in this study to improve the lift force correlation between the CFD simulations and wind tunnel measurements for geometrical configurations of the V60 and S60 models.Poor mesh resolution for the wall bounded flow existed for the VCC mesh method and therefore prisms layers were considered in this thesis to increase the mesh resolution inside the boundary layer.As slick tyres generally were used in the CFD simulations better geometrical correlation was wanted to be studied as it could improve the lift force correlation between CFD simulations and wind tunnel measurements. Therefore detailed tyres were considered in this study.As the coarsest surface mesh size was used for the underbody and the components inside the engine bay, where some of the highest flow velocities occurred, mesh refinements were investigated for engine bay and underbody in this study.The prisms layers improved the predicted behavior for the boundary layer as it captured the large velocity gradients more accurately. Due to this, the skin friction prediction was also improved. Different flow behavior around the front wheels and rear wake occurred due to earlier separation. The different flow field caused an improved correlation for the lift force but worsened correlation for the drag force due to increased pressure at the rear of the cars. However, the front lift force trend correlation for the considered configurations was improved with the prisms layer mesh method.The detailed tyres caused slight more disturbances for the underbody flow which caused more attached flow around the rear of the car hence lowered pressure. Earlier separation around the front wheels also occurred for the detailed tyre geometry as the disturbed flow around the wheels was increased. Slight improved correlation for the front and rear lift forces to the wind tunnel measurements could be seen with the detailed tyre compared to the slick tyre.The mesh refinements for the engine bay and underbody showed significant differences for the flow at the underbody which had significant impact on the flow at the rear wake for the V60 model. Minor differences could be seen for the aerodynamic forces for the baseline configuration for the V60 model while great differences occurred for the configurations affecting the underbody. Due to this significant improved correlation for the front and rear lift force trends were achieved for the underbody configurations with the refined engine bay and underbody mesh method.Conclusions could be drawn that the prisms layer caused earlier separation due to its increased mesh resolution for the wall bounded flow. However, finer mesh resolution was needed inside the boundary layer to ensure consistent separation behavior for both the considered models. Improved correlation for the front lift force could however be seen. The detailed tyre only had minor effects on the flow field and aerodynamic forces and therefore not so important to include for further studies. The refined engine bay and underbody caused significant improved lift force trend correlation to the wind tunnel measurements and should be considered for future studies. To improve the correlation between CFD simulations and wind tunnel measurements increased mesh resolution for the wall bounded flow should be considered to better capture the large velocity gradients close to the wall.
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Dalveren, Taylan. "A Study of Sensitivity Mapping Techniques for Multi-Channel MR Coils." University of Akron / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=akron1373403690.
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Lewandowski, Albert J. "Environmental sensitivity : a case study of environmental learning through nature appreciation /." The Ohio State University, 2001. http://rave.ohiolink.edu/etdc/view?acc_num=osu1486572165276547.
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Nilsson, Gustaf. "Are people with higher interoceptive sensitivity really morealtruistic? : A replication study." Thesis, Stockholms universitet, Psykologiska institutionen, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-193668.
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Interoceptive sensitivity (IS) is the ability to feel one’s own bodilysignals accurately. The connection between IS, emotional processingand consecutive behavior is a popular research topic. In this study, Itried to replicate a study by Piech and colleagues from 2017. Theoriginal study reported on a correlation between strong IS and beingmore altruistic. In this replication attempt, I used the same methodologyas in the original study; a dictator game as a measure of altruistictendencies and a heartbeat detection task as a measure of IS. However,I did not find a relationship between strong IS and being more altruistic.An analysis of the new data indicates that a minor methodologicaldifference for this replication - using a purely hypothetical dictatorgame - resulted in a generally larger amount of money given away inthe test. This complicates interpretation, since this new result can beinterpreted either as resulting from individual differences in respondingto a hypothetical game (as compared to a real game), or from an actualnull relationship found between IS and altruism. The strength of therelationship reported in the original study is still questioned, afterarguments are made that the data in replicating most favorably supportthe null relationship being a valid estimate.
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Zhang, Wei. "A sensitivity study on identification schemes of the structural vector autoregression /." free to MU campus, to others for purchase, 2001. http://wwwlib.umi.com/cr/mo/fullcit?p3025669.
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Massoli, Fabio Valerio <1987>. "The XENON1T experiment: Monte Carlo background estimation and sensitivity curves study." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amsdottorato.unibo.it/6776/1/Massoli_FabioValerio_tesi.pdf.
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Despite the scientific achievement of the last decades in the astrophysical and cosmological fields, the majority of the Universe energy content is still unknown. A potential solution to the “missing mass problem” is the existence of dark matter in the form of WIMPs. Due to the very small cross section for WIMP-nuleon
interactions, the number of expected events is very limited (about 1 ev/tonne/year), thus requiring detectors with large target mass and low background level. The aim of the XENON1T experiment, the first tonne-scale LXe based detector, is to be sensitive to WIMP-nucleon cross section as low as 10^-47 cm^2.
To investigate the possibility of such a detector to reach its goal, Monte Carlo simulations are mandatory to estimate the background. To this aim, the GEANT4 toolkit has been used to implement the detector geometry and to simulate the decays from the various background sources: electromagnetic and nuclear. From the analysis of the simulations, the level of background has been found totally acceptable for the experiment purposes: about 1 background event in a 2 tonne-years exposure. Indeed, using the Maximum Gap method, the XENON1T sensitivity has been evaluated and the minimum for the WIMP-nucleon cross sections has been found at
1.87 x 10^-47 cm^2, at 90% CL, for a WIMP mass of 45 GeV/c^2. The results have been independently cross checked by using the Likelihood Ratio method that confirmed such results with an agreement within less than a factor two. Such a result is completely acceptable considering the intrinsic differences between the two statistical methods. Thus, in the PhD thesis it has been proven that the XENON1T detector will be able to reach the designed sensitivity, thus lowering the limits on the WIMP-nucleon cross section by about 2 orders of magnitude with respect to the current experiments.
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Massoli, Fabio Valerio <1987>. "The XENON1T experiment: Monte Carlo background estimation and sensitivity curves study." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amsdottorato.unibo.it/6776/.
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Despite the scientific achievement of the last decades in the astrophysical and cosmological fields, the majority of the Universe energy content is still unknown. A potential solution to the “missing mass problem” is the existence of dark matter in the form of WIMPs. Due to the very small cross section for WIMP-nuleon
interactions, the number of expected events is very limited (about 1 ev/tonne/year), thus requiring detectors with large target mass and low background level. The aim of the XENON1T experiment, the first tonne-scale LXe based detector, is to be sensitive to WIMP-nucleon cross section as low as 10^-47 cm^2.
To investigate the possibility of such a detector to reach its goal, Monte Carlo simulations are mandatory to estimate the background. To this aim, the GEANT4 toolkit has been used to implement the detector geometry and to simulate the decays from the various background sources: electromagnetic and nuclear. From the analysis of the simulations, the level of background has been found totally acceptable for the experiment purposes: about 1 background event in a 2 tonne-years exposure. Indeed, using the Maximum Gap method, the XENON1T sensitivity has been evaluated and the minimum for the WIMP-nucleon cross sections has been found at
1.87 x 10^-47 cm^2, at 90% CL, for a WIMP mass of 45 GeV/c^2. The results have been independently cross checked by using the Likelihood Ratio method that confirmed such results with an agreement within less than a factor two. Such a result is completely acceptable considering the intrinsic differences between the two statistical methods. Thus, in the PhD thesis it has been proven that the XENON1T detector will be able to reach the designed sensitivity, thus lowering the limits on the WIMP-nucleon cross section by about 2 orders of magnitude with respect to the current experiments.
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Kuppuswamy, Harini. "An experimental investigation of the sensitivity of a buried fiber optic intrusion sensor." Texas A&M University, 2005. http://hdl.handle.net/1969.1/3087.
Full textAbstract:
A distributed fiber optic sensor with the ability of detecting and locating intruders
on foot and vehicles over long perimeters (>10 km) was studied. The response
of the sensor to people walking over or near it and to vehicles driving nearby was observed
and analyzed. The sensor works on the principle of phase sensitive optical time
domain re
ectometry, making use of interferometric effects of Rayleigh backscattered
light along a single mode fiber. Light pulses from a highly stable Er:doped fiber laser
emitting single longitudinal mode light and exhibiting low frequency drift are passed
through one end of the buried fiber. The backscattered light emerging from the same
fiber end was monitored using a photodetector. The phase changes produced in the
light pulse due to the pressure of the intruder walking directly above or near the
sensor or from the seismic disturbances created by vehicles moving in the vicinity of
the sensor are detected using the phase sensitive Optical Time Domain Re
ectometer (OTDR).
Field tests were conducted with the sensing element as a single mode fiber in a
3-mm diameter cable buried at depths ranging from 8 to 18 inches in clay soil. It was
observed that the sensor could detect intruders walking transverse to the cable line at
a distance of 40 ft from it. A car moving at a speed of 30 mph on a rough road could
be consistently detected up to a distance of 480 ft from the sensor, while a car driven
on a smooth road 200 ft from the sensor could be detected only when passing through
rough patches on the road. Tests were also performed with an intruder walking near the sensor while a car was driven at a speed of 30 mph on a rough road. The effect
on the signal due to the intruder on foot could be distinguished clearly only when the
car was at least 200 ft away from the sensor.
The results in this thesis represent the first quantitative study of the sensitivity
of the sensor under varied test conditions. It is expected that these findings will be
helpful in the practical implementation of the long perimeter intrusion sensor along
high security domains like national borders, military bases and government buildings.
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Roberts, Ralph Nigel. "Insulin sensitivity in reproductive medicine : application of the minimal model of glucose disappearance to the study of insulin sensitivity in reproductive medicine." Thesis, Queen's University Belfast, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.318955.
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Yilmaz, Ozturk Nazan. "Probabilistic Seismic Hazard Analysis: A Sensitivity Study With Respect To Different Models." Phd thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/3/12609403/index.pdf.
Full textAbstract:
Due to the randomness inherent in the occurrence of earthquakes with respect to time, space and magnitude as well as other various sources of uncertainties, seismic hazard assessment should be carried out in a probabilistic manner.
Basic steps of probabilistic seismic hazard analysis are the delineation of seismic sources, assessment of the earthquake occurrence characteristics for each seismic source, selection of the appropriate ground motion attenuation relationship and identification of the site characteristics. Seismic sources can be modeled as area and line sources. Also, the seismic activity that can not be related with any major seismic sources can be treated as background source in which the seismicity is assumed to be uniform or spatially smoothed. Exponentially distributed magnitude and characteristic earthquake models are often used to describe the magnitude recurrence relationship. Poisson and renewal models are used to model the occurrence of earthquakes in the time domain.
In this study, the sensitivity of seismic hazard results to the models associated with the different assumptions mentioned above is investigated. The effects of different sources of uncertainties involved in probabilistic seismic hazard analysis methodology to the results are investigated for a number of sites with different distances to a single fault. Two case studies are carried out to examine the influence of different assumptions on the final results based on real data as well as to illustrate the implementation of probabilistic seismic hazard analysis methodology for a large region (e.g. a country) and a smaller region (e.g. a province).
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Ogeman, Elin. "Sensitivity Study of Semisubmersible Motions to Hull Form Parameters and Their Optimisation." Thesis, KTH, Marina system, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-162073.
Full textAbstract:
An optimisation routine is developed to find the optimal size of a semisubmersible regarding the seven geometrical variables, column radius, column draught, pontoon height, pontoon beam, horizontal column distance and total underwater beam. Depending on the user’s input, the objective function consists of both heave, roll and pitch motions in several different wave directions. The aim is to minimise the motions of a semisubmersible to increase its workability in a specific sea state. Overall, it is proven that the optimal design of a semisubmersible depends on the objective function. Hence, depending if the user wants to decrease the heave, roll or pitch motions, different designs will be obtained. Furthermore, it is shown that a single goal objective function works better than a multiple goal objective function for the optimiser. A multiple goal function should preferably be rewritten as a single goal function with several constraints.
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Kao, Chih-Chung. "A study of the sensitivity of the Greenland Sea acoustic tomography array." Thesis, Monterey, California. Naval Postgraduate School, 1989. http://hdl.handle.net/10945/27295.
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Gautre, Christy. "Time-Lapse Depletion Modeling Sensitivity Study: Gas-Filled Gulf of Mexico Reservoir." ScholarWorks@UNO, 2010. http://scholarworks.uno.edu/td/1187.
Full textAbstract:
Time-lapse seismic allows oil/gas reservoir monitoring during production, highlighting compaction and water movement. Time-lapse modeling, using a stress-dependent rock physics model, helps determine the need and frequency of expensive repeat seismic acquisition. We simulate a Gulf of Mexico gas reservoir time-lapse response for depletion and water flooding using uncertainty ranges in water saturation, porosity, stress-induced velocity changes, and pore compressibility. An analysis is conducted to see if a water-swept region could have been predicted. Findings show the swept and un-swept monitor cases amplitude differences range from 6% to 15%, which is higher than the actual monitor seismic noise level. Thus, it is unlikely these cases could be differentiated. However, the modeled amplitude changes from base to monitor cases do not match measured amplitude changes. This suggests the rock property model requires pressure-variance improvement and/or the changes in seismic amplitudes are associated with pressure/porosity, thickness, or saturation cases not modeled.
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Farber, Kathleen Hickam. "An Experimental Study of Scotopic Sensitivity Irlen Syndrome in Learning Disabled Students." PDXScholar, 1994. https://pdxscholar.library.pdx.edu/open_access_etds/1329.
Full textAbstract:
This study examined the effect on reading performance of a controversial treatment for a dysfunction of visual perception known as Scotopic sensitivity/lrlen Syndrome. The treatment, referred to as spectral modification, involved the use of colored transparent overlays for reading by four elementary school children in their actual school environments. The diagnostic, prescriptive and remediation procedures used in this study were originally developed by Helen Irlen, a California psychologist and researcher. Irlen conceptualized Scotopic Sensitivity Syndrome as a difficulty in visual processing of the printed page when perceived through full spectrum light. Spectral modification techniques were considered controversial in that they were employed prior to scientific validation of the syndrome. Previous research used pre-test/post-test experimental designs to test the effect of spectral modification on reading performance. The research problem addressed here was that the technique had not been systematically examined over time in the school setting, and from the practitioner's point of view. Sample selection involved pre-screening and screening phases. The pre-screening procedures of teacher recommendation and file review resulted in a pool of 26 children who were screened with the Irlen Differential Perceptual Interview Survey. Four subjects were selected who were in separate school settings, who demonstrated Irlen Syndrome to a significant extent, and whose profiles did not present variables which would compromise their participation. These four underwent comprehensive vision evaluations as a preliminary assessment procedure. A four-strand single-subject experimental design was used to generate data on subjects' rate and accuracy of oral reading, and comprehension of silent reading. Performance changes during experimental reading trials varied between the four, although three subjects exhibited positive performance change on one indicator. A supporting procedure was that subjects were pre and post-tested on the three performance indicators. Post-test results corroborated the changes demonstrated by three subjects Interview formats were employed to obtain qualitative data from teachers, parents, and the subjects themselves. Recommendations for practitioners intending to implement spectral modification techniques were generated from this data.
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Turan, Ceren <1984>. "Study of Venturia inaequalis sensitivity to fungicides through molecular and biological methodologies." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amsdottorato.unibo.it/5638/1/turan_ceren_tesi.pdf.
Full textAbstract:
This study was aimed to correlate the results of relative germination from in vitro tests by trifloxystrobin with those of qPCR on a wide range of V. inaequalis populations and monoconidial isolates. Samples were collected in Italian and Turkish distinct locations from orchards with different scab management. In this study, an allele-specific qPCR with primer sets designed was successfully developed to quantitatively determine the frequency of QoI-resistant allele G143A in populations and monoconidial isolates of V. inaequalis. qPCR followed a similar pattern to that obtained using in vitro conidial germination test in very sensitive and very resistant populations. However, the variability between two test results was observed in hetereogenous populations. Therefore, the results of correlations between in vitro and qPCR showed a positive but not very high correlation for Venturia inaequalis populations (R2=0.70). On the contrary, this correlation between two assessment methods was very high for monoconidial isolates (R2=0.92). Results obtained in quantitative PCR and from traditional spore germination assay differed for the same fungal population and in some cases, it is difficult to assess the resistance in the field by only qPCR.
It was concluded that it is not always possible to correlate the frequency of detection of the mutation with biological assessment. In such situations, monitoring by molecular techniques must be supported by standard in vitro resistance assessments and observation of field performance in order to have correct conclusions.
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Turan, Ceren <1984>. "Study of Venturia inaequalis sensitivity to fungicides through molecular and biological methodologies." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amsdottorato.unibo.it/5638/.
Full textAbstract:
This study was aimed to correlate the results of relative germination from in vitro tests by trifloxystrobin with those of qPCR on a wide range of V. inaequalis populations and monoconidial isolates. Samples were collected in Italian and Turkish distinct locations from orchards with different scab management. In this study, an allele-specific qPCR with primer sets designed was successfully developed to quantitatively determine the frequency of QoI-resistant allele G143A in populations and monoconidial isolates of V. inaequalis. qPCR followed a similar pattern to that obtained using in vitro conidial germination test in very sensitive and very resistant populations. However, the variability between two test results was observed in hetereogenous populations. Therefore, the results of correlations between in vitro and qPCR showed a positive but not very high correlation for Venturia inaequalis populations (R2=0.70). On the contrary, this correlation between two assessment methods was very high for monoconidial isolates (R2=0.92). Results obtained in quantitative PCR and from traditional spore germination assay differed for the same fungal population and in some cases, it is difficult to assess the resistance in the field by only qPCR.
It was concluded that it is not always possible to correlate the frequency of detection of the mutation with biological assessment. In such situations, monitoring by molecular techniques must be supported by standard in vitro resistance assessments and observation of field performance in order to have correct conclusions.
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Kuan, wai-ling, and 官瑋聆. "Study of high-sensitivity heterodyne interferometer." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/81259628871056069099.
Full textAbstract:
碩士聖約翰科技大學
自動化及機電整合研究所
100
ABSTRACT Traditional heterodyne interferometer is a very important measurement tools, from point of view, displacement, refractive index, surface profile, temperature optical speed to biochemical activity, have extensive use of heterodyne interferometer. It has a fast response, easy integration with other technologies, and measurement accuracy advantages. In this article, we will be the traditional heterodyne interferometer with one-half wave plate structure to improve its sensitivity. The experiment confirmed that using this improved the heterodyne interferometer can be increased by 4 times the sensitivity. And the displacement measurement, signal to noise ratio (SNR) and stability experiments。 This method has a total optical path structure, it has a high stability, and easy to set up assembly, and a timely measure of merit. Stability can be achieved an average error of 0.061, SNR values of up to 43.2db.
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Zeng, Yuan-Kai, and 曾元鍇. "Sensitivity Study of Structuredependent Explicit Method." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/6qx6kv.
Full textAbstract:
碩士國立臺北科技大學
土木與防災研究所
96
Formerly studied explicit integration method with unconditional stability, has explicit integration method to calculate simpler and a time-saving merit, and simultaneously holds implicit integration method unconditional stability the merit. Integration equations coefficient of this integration method is expresses by the structure basic nature and the integration time length of stride product. Speaking of uses explicit integration method with unconditional stability to carry on step-by-step integration Pseudodynamic test, carries on before the experiment essential to gauge the structure initial stiffness matrices in order to calculates integration equations coefficient, can use step-by-step integration method to carry on the operation. However, speaking of the highly non-linear material, when its initial stiffness often can gauge exerts the displacement different obtains different values, then, integration equations coefficient will have a difference because of initial stiffness values, then will have the influence to the explicit integration method with unconditional stability integral result.Therefore, the present paper will penetrate numerical examples and Pseudodynamic test, will discuss this kind of difference to explicit integration method with unconditional the stability precision influence. Knew by the result, reaction time structure in important low frequency, the precision of integral won’t have the obvious influence because of difference of the initial stiffness gauging.
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Chen, Yen-po, and 陳彥伯. "Sensitivity Study for Interferometric Chromatic Dispersion Monitoring." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/28582938499040308950.
Full textAbstract:
碩士國立臺灣科技大學
電子工程系
100
In recent years, fiber optic communication system is always pursuing the higher efficiency in transfer rate and faster speed response in bit error rate. Because of the dispersion issue in the fiber optic communication system, it becomes one of the main factors that limits the performance on the system’s transfer efficiency and speed response. The Mach-Zehnder delayed interferometer (MZDI) system was utilized to monitor the chromatic dispersion (CD) in this thesis. The CD monitoring system was first made by the silicon-on-insulator (SOI) platform, which has been developed and demonstrated as high speed electronics and highly optoelectronic integrated circuits (OEIC) due to the large refractive index and its compatibility with the complementary metal oxide semiconductor (CMOS) standard process. The SOI based MZDI consists of two 2x2 multimode interfering coupler (MIC) and delayed 100-ps optical path between two arms. The optical delay is equal to 8689.6-?慆 physical length difference from 10 Gb/s modulation speed. We can see that the MZDI output optical isolation is mainly affected by the coupling ratio and delay optical path propagation loss. An asymmetric 2x2 MIC was then utilized to get the splitting ratio of 66/33 for the optical loss compensation between two MZDI arms. The output optical isolation should be infinite. Due to the optical waveguide trapezoidal geometry after processing, the experimental data from 2x2 MIC were showing 90/10 splitting ratio and the isolation was only 2dB due to the higher propagation loss of 5 dB/cm on SOI waveguides. To improve the MZDI isolation based on the current SOI waveguide propagation loss, 2x2 MIC splitting ratio should be maintained at 70/30. Due to the difficulty in the waveguide geometry and optical loss from SOI waveguide processing control, the polarization maintain fiber (PMF) based MZDI was taken as the CD monitor, which delay optical path difference can be precisely controlled by the stepper motor stage in the optical low coherence interferometer. At the wavelength of 1550 nm, the CD monitoring range was up to -2000 ps/nm at 10-Gb/s modulation speed and 100-ps delayed optical path and the sensitivity could achieve 4x10-3dB.nm/ps. The MZDI path difference was typically calibrated by the free spectral range (FSR). However, the resolution from the tunable laser source and optical spectrum analyzer was normally around 0.01 – 0.02 nm, which will cause 10-Gb/s modulation, which is equal to 8689.6 ?慆 delayed optical path, up to 0.016-nm wavelength variation, same as 7.5-mm optical path difference in MZDI. The CD monitoring sensitivity was then degraded, the 500-ps/nm CD increased at the increased 1-dB RF power. The tunable and adjustable MZDI could effectively improve the CD monitoring sensitivity at low cost.
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CHEN, SHIN-KAI, and 陳信凱. "Study of Low Sensitivity Bandpass Filter Properties." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/97001391355841003623.
Full textAbstract:
碩士逢甲大學
資訊電機工程碩士在職專班
99
Band-pass filter is a very common and important communication components, designers should not be used to filter and attenuation of the signal band to the filter frequency response curve characteristics, the majority of filters are based on Chebyshev filter . The papers use Chebyshev polynomials as a seed function, to further modify the chained filter function, through the design parameters of the coupling coefficient and coupling matrix used with the ADS and Zeland program and other computer-aided software to estimated and compared the conventional Chebyshev bandpass filter and the modified chained filtering function bandpass filter frequency response, low sensitivity characteristics.
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Luca, Peter. "High sensitivity VLBI study of the quasar 3C454.3 /." 2007. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:MR38804.
Full textAbstract:
Thesis (M.Sc.)--York University, 2007. Graduate Programme in Physics and Astronomy.Typescript. Includes bibliographical references (leaves 105-109). Also available on the Internet. MODE OF ACCESS via web browser by entering the following URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:MR38804
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LIN, DONG-HAI, and 林東海. "A study on sampling survey for sensitivity problen." Thesis, 1989. http://ndltd.ncl.edu.tw/handle/77585018466172537338.
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Lee, Chin-Hsiung, and 李俊雄. "Study of Sensitivity to Purine Metabolism in Man." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/63409422535304573812.
Full textAbstract:
碩士國立中正大學
化學工程研究所
93
Mathematical modeling of purine metabolism in man was shown with regard to Michaelis-Menten (MM) model which was difficult to study on analysis of sensitivity. Therefore, we transferred MM model into GMA model with power-law approximation, Methematica software tools and simulated its dynamic behavior in response to different operating points. From the simulating result of rate constant analysis, we could find the concentration change of ARNA, APRT, GPRT, HPRT, GRPT, and ASLI enzymes would brought about the abnormalities in purine metabolism.. Alternatively, we would focus on the above specific enzymes to study their relative sensitivities with PLAS software tool. In the end, we used GMA model to make a simulating computation by changing the enzyme activities of ASLI in purine metabolic pathway, and compared the simulated result with clinical data, Furthermore, we made a discussion and analysis between the results of the drug therapy on gout patients.
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Yang, Ying. "A Study of Predicted Energy Savings and Sensitivity Analysis." Thesis, 2013. http://hdl.handle.net/1969.1/151215.
Full textAbstract:
The sensitivity of the important inputs and the savings prediction function reliability for the WinAM 4.3 software is studied in this research. WinAM was developed by the Continuous Commissioning (CC) group in the Energy Systems Laboratory at Texas A&M University. For the sensitivity analysis task, fourteen inputs are studied by adjusting one input at a time within ± 30% compared with its baseline. The Single Duct Variable Air Volume (SDVAV) system with and without the economizer has been applied to the square zone model. Mean Bias Error (MBE) and Influence Coefficient (IC) have been selected as the statistical methods to analyze the outputs that are obtained from WinAM 4.3. For the saving prediction reliability analysis task, eleven Continuous Commissioning projects have been selected. After reviewing each project, seven of the eleven have been chosen. The measured energy consumption data for the seven projects is compared with the simulated energy consumption data that has been obtained from WinAM 4.3. Normalization Mean Bias Error (NMBE) and Coefficient of Variation of the Root Mean Squared Error (CV (RMSE)) statistical methods have been used to analyze the results from real measured data and simulated data.
Highly sensitive parameters for each energy resource of the system with the economizer and the system without the economizer have been generated in the sensitivity analysis task. The main result of the savings prediction reliability analysis is that calibration improves the model’s quality. It also improves the predicted energy savings results compared with the results generated from the uncalibrated model.
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Tsai, Lin-Jeng, and 蔡林正. "Study of SAW Detectors Sensitivity for Gas Chromatography System." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/775ux2.
Full textAbstract:
碩士中原大學
電子工程研究所
100
The modern gas sensing technology plays an important role in industrial safety, personal health and environmental monitoring. The SAW devices provide superior properties: in terms of sensitivity, stability, compact size, response time, processing simplicity and cost; therefore, these SAW devices are suitable for broad applications. Two-ports SAW devices are used and designed for 433MHz oscillators, these 433MHz oscillators are applied as SAW sensors in the gas chromatography system. The sensitivity performance of SAW devices are used in the GC system. The experimental result of SAW sensor's sensing performance is also compared with those of the commercial FID. Three gases including ethyl acetate, alcohol and butanone are used for quantitative concentration analysis. Based on the experimental results, the quantitative calibration curves have been obtained successfully. Their standard deviations of accuracy are within 8%, and their sensitivity ranges from 330 to 450 (Hz/μmole) while the limitation of detection is between 0.75 and 0.91 μmole. Moreover, the SAW devices show better sensitivity and sensing limitation under the lower temperature.
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Hong, Jia-Huang, and 洪佳煌. "Sensitivity Study of the Heat Pipe Performance Test Instrument." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/09118681697874370027.
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CHEN, LI-SHENG, and 陳立生. "A study on the sensitivity of linearly damped system." Thesis, 1987. http://ndltd.ncl.edu.tw/handle/64463045406653553396.
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