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 20 of 90 for “"Defect detection"”.
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Thermography Approaches for Building Defect Detection
… can be used to detect thermally significant defects in buildings and is traditionally performed using a walk-through methodology. Yet because of limitations such as transient climatic changes, there is a key performance gap between image capture and interpretation. There are however new …
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Defect Detection in Selective Laser Melting
… using selective laser melting (SLM) are prone to defects created during the build process due to part shrinkage while cooling. Currently defects are found only after the part is removed from the printer. To determine whether cracks can be detected before a print is completed, this project …
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Non-contact defect detection in silicon
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1984.
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A Multiple Sensors Approach to Wood Defect Detection
… it takes more time to remove the additional defects that occur in the lower grade material. Simultaneously, labor costs have gone up and availability of skilled workers capable of getting a high yield of usable parts has markedly decreased. To face this increasingly complex and competitive …
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Bridge Pier Surface Defect Detection Based on Improved YOLOV9
This research introduces an innovative surface defect detection methodology specifically designed for bridge piers, which integrates state-of-the-art image enhancement algorithms with sophisticated target detection frameworks. This hybrid approach effectively addresses some of the inherent …
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Real time defect detection in welds by ultrasonic means
… system has been developed to detect weld defects ultrasonically whilst welding is in progress. This system, including a flash analogue to digital converter and built-in memories to store sampled data, a peak characters extractor and a welding process controller, enabled welding processes …
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Automated defect detection and evaluation in X-ray CT images
… This work provides methods for the automatic detection of defects and their geometric description. The approach will be based on spatial statistical analysis of the voxel structure to determine the presence of a defect. Once detected, defect voxels will be clustered to determine shape and size …
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The Study of Ultrasonic Pulse -Echo Subwavelength Defect Detection Mechanism
… inspection implementation. The subwavelength defect detection mechanism study prompts our understanding about nondestructive characterization and evaluation of materials.
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Deep Transfer Learning for Macroscale Defect Detection in Semiconductor Manufacturing
… regarding the presence of macroscale defects. In this work, a model for detecting central defects is described in detail, and a novel approach to overcoming data scarcity through the creation of synthetic data is deployed. The binary classifier model achieves an out-of-distribution …
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Data Intensive Method For Processing Defect Detection and Mitigation For Composites
<p>Composite manufacturing without processing defects is a crucial step in satisfying the production, performance, and quality requirements of composite materials in various industries. Autoclave processing enables manufacturing of high-quality composite parts with excellent mechanical properties, …
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Automated Assessment of Student-written Tests Based on Defect-detection Capability
… measures of test quality based on how many defects the tests can detect either from code written by other students—all-pairs execution—or from artificially injected changes—mutation analysis. We also investigate a new potential measure called checked code coverage that calculates coverage …
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In-Situ Defect Detection Using Acoustic Vibration Monitoring for Additive Manufacturing Processes
… situational unknowns that can cause detrimental defects, often on micron scales.</p> <p>Through in-situ monitoring techniques, such as visual or acoustic monitoring, a secondary level of quality assessment can be performed. This type of real time monitoring solution can be used in a variety of …
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Comparative study of non-destructive testing methods of defect detection on aircraft
… that respond with a high probability of detection of defects on such high-specific strength materials. In this thesis, Digital shearography and Infrared Thermography (IRT) techniques are employed to test aircraft composite materials. Background information on the techniques has been …
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Automatic interpretation of computed tomography (CT) images for hardwood log defect detection
… an image interpretation system for the automatic detection of internal hardwood log defects. The goal of the research is that such a system should not only be able to identify and locate internal defects of hardwood logs using computed tomography (CT) imagery, but also should be able to …
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Defect detection using 3D computed tomography images and application on nuclear power plants
Tools used in nuclear power plant (NPP) inspection are required to be inspected before and after use on a reactor to check their integrity. To address the long duration required for manual inspection, non-destructive testing (NDT) can be implemented. In this thesis, a novel NDT framework is …
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Defect detection and condition assessment of adhesively-bonded joints using acoustic emission techniques.
… of acoustic emission (AE) techniques to the defect detection and monitoring of adhesively-bonded joints. Pencil Lead Breaks (PLBs) have been used as a simulated AE source to experimentally investigate the characteristics of AE wave-propagation in adhesively-bonded joints, and have been …
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On Infrared Grey -Field Photoelasticity and Applications for Defect Detection in Bonded Semiconductor Devices
*This dissertation is a compound document (contains both a paper copy and a CD as part of the dissertation). The CD requires the following system requirements: Micrsoft Office; Windows MediaPlayer or RealPlayer.
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