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Showing 1 to 20 of 46 for “"Velocity measurement"”.
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Gas Shale Permeability and Velocity Measurement at Laboratory Scale
… can not be easily acquired from direct field measurements; it can only be measured in the laboratory. The main goal of this thesis was to characterize the elastic properties and gas transport properties for the Barnett shale which comes from the Fort Worth basin in North Texas, of the United …
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Flow velocity measurement in haemodialysis access using 4D MRI
Treatment of renal failure while awaiting transplant requires vascular access, which comes with both complications and failure rates. In order to improve this, information about the AVF or AVG itself, as well as the haemodynamics is required. This data will then be used for computer modelling …
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Local liquid velocity measurement of trickle bed reactor using digitial industrial X-ray radiography
… only fuels but also lubrication products. The measurement and the knowledge of local liquid velocities (VLL) in TBRs is less which is essential for advancing the understanding of its hydrodynamics and for validation computational fluid dynamics (CFD). Therefore, this work focused on developing …
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Evaluation of four rugged long-term velocity measurement methods for assessment of hydrokinetic energy production
… investigated to measure non-instantaneous river velocity to eliminate seasonal elements that can damage velocity instruments when deployed over a long-term period for measurements at energetic sites. Velocity data is required to predict the 95% confidence interval of the power production from …
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Velocity measurement in edge channel of wire wrapped fuel assembly by the Laser Doppler method.
Massachusetts Institute of Technology. Dept. of Nuclear Engineering. Thesis. 1974. M.S.
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Visualization and velocity measurement of unsteady flow in a gas generator using cold-flow technique
… tubes. Tests were run for flow visualization and measurement of axial velocity at different frequencies ranging from 4 Hz to 12 Hz. Flow visualization showed that the incoming flow was a complex jet flow conformed to a cylindrical enclosure, while the outgoing flow resembled the venting of a …
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Velocity measurement of laser energy induced Rayleigh surface waves on bulk substrates employing the optical beam deflection (knife-edge detection) method
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1995.
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Experimental Testing of a Decentralized Model Reference Adaptive Controller for a Mobile Robot
… available for the research did not allow for the measurement of joint velocity, so it was necessary to estimate the velocity as the derivative of the position measurement. The noise created by this estimation made completion of testing impossible. Future research should be performed on a robot …
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Current velocity profiling from an autonomous underwater vehicle with the application of Kalman filtering
… schemes for extracting Earth-referenced current velocity from relative current velocity measurement made by an Acoustic Doppler Current Profiler (ADCP) borne by an Autonomous Underwater Vehicle (AUV). Compared with conventional approaches, current profiling from an AUV platform has advantages …
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Elastic Constants of Plastic Crystals by Schaefer-Bergmann Scattering: Crystalline Cyclohexane and Deuteromethane
The Schaefer-Bergmann technique for sound velocity measurement has been adapted for use with solidified liquids and gases. The advantages of this method for measuring elastic constants of plastic crystals are discussed. A method for determining both the elastic constants and the spacial orientation …
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Refinement and Verification of the Virginia Tech Doppler Global Velocimeter (DGV)
Repairs and modifications were made to a flow velocity measurement system designed to measure a planar area of unsteady three component velocities in a single realization using a velocity measurement technique referred to as Doppler Global Velocimetry (DGV). Several hardware components in the …
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Development and Application of Particle Image Velocimetry in High-Speed Separated Flow: Two-Dimensional Base Cavities
… to obtain two-dimensional instantaneous velocity data over a planar region in high-speed separated flows for the quantitative analysis of turbulent and unsteady flow structures. This PIV system is the first of its type to incorporate sub-micron seed particles and birefringent image …
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Doppler global velocimetry measurements in a wing flow field with tip blowing
… and tested. DGV is a non-intrusive optical velocity measurement technique. DGV measures the Doppler shift of the frequency of the light scattered by seed particles at a specific location. The velocity of the particles is related to the Doppler shift.;DGV measurements were made in the WVU low …
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Measurement of Cosmic Ray Lithium Isotopes Using the Alpha Magnetic Spectrometer
… poses a particular challenge, as it requires the measurement of multiple observables to a high degree of accuracy for the deduction of nuclear mass. Using the unique detection capabilities of the Alpha Magnetic Spectrometer (AMS), the isotope fluxes of cosmic ray lithium in the rigidity range of …
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Infrared imaging: a proposed validation technique for computational fluid dynamics codes used in STOVL applications
… with the thermocouple traverses. Temperature and velocity measurement techniques, infrared imaging, and the computer model of the infrared imaging technique are presented and discussed. From the study, it is concluded that infrared imaging techniques coupled with the radiative exchange equations …
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Integration and Validation of Flow Image Quantification (Flow-IQ) System
… scheme was developed which does not limit the measurement to circular patterns. The elliptic estimator developed in this work is able to estimate the diameter of a particle with an elliptic shape, and assumes that the particle is axisymmetric about the x or y axis. Two elliptical schemes, the …
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Target Tracking from a UAV based on Computer Vision
… controller based on the relative position and velocity between the moving target and the quadrotor. Interface between PC and quadrotor is built by controlling the PWM signals of the transmitter for command transmission. Three types of position controllers including PD controller, fuzzy …
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Dispersão de traçador em medições de vazões em tubulações
… (mainly REDUC refinery an FABOR factory). Measurements were perfomed by the so-called Peak-to-Peak method with two completely independed measuring systems. It has been shown than an accuracy better than one percent is easily obtainable by this method for the flow velocity measurement. …
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Electrical system for interfacing with muscle for use in prosthetic devices
… used for proprioception. This scheme requires measurements of muscle length, velocity, and electrical activation in order to provide feedback control for the stimulation. These measurements can also be used to interpret the user's intent for movement of their prosthesis. However, no such …
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A Compact Ultrasonic Airflow Sensor for Clinical Monitoring of Pediatric Tracheostomy Patients
… correlates the timing of acoustic signals to velocity measurement. The compact prototype developed here can non-invasively measure all airflow into and out of a patient, so that breath interruption can easily be detected. This paper concerns technical design of the sensor, including the …
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