- About
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The Global ETD Search service is a free service for researchers
to find electronic theses and dissertations. This service is
provided by the
Networked Digital Library of Theses and Dissertations.
Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
Search results
Showing 31 to 40 of 120 (0.008 seconds)| 31 |
Applications of multivariate calibration models and factor analysis to spectroscopic dataRogers, Louise Jennifer January 1998 (has links)
No description available.
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On-line systems for automated sample introduction in atomic spectrometryPitts, Leslie John January 1995 (has links)
No description available.
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New approaches to automated analytical instrumentationCorns, Warren Thomas January 1991 (has links)
No description available.
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Multicore optical fibre sensors for differential strain measurementGander, Matthew James January 2000 (has links)
No description available.
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A study of optical and opto-electronic techniques for nondestructive testingWang, Jianmin January 1992 (has links)
No description available.
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The application of transient thermography to defect detectionHamzah, Ab Razak January 1996 (has links)
No description available.
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Detection of matrix cracking in a GFRP laminate using a fibre optic sensorBarton, Elena January 2000 (has links)
No description available.
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Pulsed eddy-current measurements for materials characterization and flaw detectionJohnson, Marcus James January 1997 (has links)
No description available.
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A frequency agile approach to air-coupled Lamb wave inspectionBanks, Robert January 1999 (has links)
This Thesis describes the design, manufacture and evaluation of a single sided through-air Lamb wave scanner for Non-Destructive Evaluation (NDE). The new scanning system utilises novel wideband piezocomposite transducers and specialised receive electronics to detect and monitor the thickness of faults within the structure under investigation using a frequency agile approach. Based upon the superheterodyne principle, this frequency agility dispenses with the costly requirement for precision manipulation of the transducer alignment, by effectively tuning the system for the thickness of the sample. Several important applications are identified, including defect detection on samples with tapered thicknesses and defect depth characterisation on plates with thickness erosion, in addition to conventional defect evaluation. Through the application of finite element modelling and practical analysis, a new range of wideband composite transducer have been developed which offer a considerable improvement in operational bandwidth in comparison to conventional piezocomposites. Moreover, a specialised ultra low noise heterodyning amplifier was designed and constructed to provide sufficient gain and selectivity to detect the Lamb waves generated in the various structures under examination. Experimental results obtained from the prototype system illustrate a capability to distinguish defects within test specimens of differing materials and determine the thickness of the given defect. The current system is capable of resolving defects down to less than 2mm in diameter or 20% thinning in a 1mm thick aluminium plate for a Lamb wave with a wavelength of 3mm. Moreover, the handheld nature of the scanning head employed within this system has facilitated the examination of practical NDE examples, such as disbonds between vehicle support structures and outer panelling over curved structures.
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Automated reflection photoelasticity : digital data acquisition and useZhang, Su Juan January 2000 (has links)
No description available.
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