Dissertation Abstracts International Research Articles

52971 Determination of the elastic constants of composite materials from ultrasonic group velocity measurements : Niu, Lin Dissertation Abstracts International, vol. 53, no. 7, p. 3584 (Jan. 1993) (DA9236006)

52971 Determination of the elastic constants of composite materials from ultrasonic group velocity measurements : Niu, Lin Dissertation Abstracts International, vol. 53, no. 7, p. 3584 (Jan. 1993) (DA9236006)

Machining process characterization and intelligent tool condition monitoring using acoustic emission signal analysis : Dissertation Abstracts International, Vol. 50, No. 7, p. 3114-B (Jan. 1990)

Machining process characterization and intelligent tool condition monitoring using acoustic emission signal analysis : Dissertation Abstracts International, Vol. 50, No. 7, p. 3114-B (Jan. 1990)

Intelligent acoustic emission sensing in machining for tool condition monitoring : Dissertation Abstracts International Vol. 51, No. 5, pp. 2575-B (Nov. 1990) (DA9028894)

Intelligent acoustic emission sensing in machining for tool condition monitoring : Dissertation Abstracts International Vol. 51, No. 5, pp. 2575-B (Nov. 1990) (DA9028894)

Ultrasonic signal processing and pattern recognition in evaluating the microstructure of materials: 41631 Tao, W. Dissertation Abstracts International, Vol. 49, No. 4, p. 1327 (Oct. 1988)

Ultrasonic signal processing and pattern recognition in evaluating the microstructure of materials: 41631 Tao, W. Dissertation Abstracts International, Vol. 49, No. 4, p. 1327 (Oct. 1988)

Digital processing of ultrasound signals backscattered from coarse grained austenitic stainless steel: 45156 Lawrence, M. Dissertation Abstracts International, Vol. 51, No. 3, pp. 1416 (Sep. 1990) (BROX 89358)

Digital processing of ultrasound signals backscattered from coarse grained austenitic stainless steel: 45156 Lawrence, M. Dissertation Abstracts International, Vol. 51, No. 3, pp. 1416 (Sep. 1990) (BROX 89358)

A study of ultrasound backscatter techniques for monitoring stresses and simulated crack mouth opening in aluminium alloys and steel used for offshore oil platforms: 45649 Kreshna, A. Dissertation Abstracts International Vol. 51, No. 5, pp. 2586-B (Nov. 1990) (BRDX90192)

A study of ultrasound backscatter techniques for monitoring stresses and simulated crack mouth opening in aluminium alloys and steel used for offshore oil platforms: 45649 Kreshna, A. Dissertation Abstracts International Vol. 51, No. 5, pp. 2586-B (Nov. 1990) (BRDX90192)

Backscatter from flaws in fiber-reinforced composites: 38504 Qu Jianmin Dissertation Abstracts International, Vol. 48, No. 8, pp. 2377–2378 (Feb. 1988)

Backscatter from flaws in fiber-reinforced composites: 38504 Qu Jianmin Dissertation Abstracts International, Vol. 48, No. 8, pp. 2377–2378 (Feb. 1988)

Study of beamforming techniques for ultrasound imaging in nondestructive testing: Ghorayeb, S.R. Dissertation Abstracts International, Vol. 53, No. 3, p. 1529 (Sep. 1992)

Study of beamforming techniques for ultrasound imaging in nondestructive testing: Ghorayeb, S.R. Dissertation Abstracts International, Vol. 53, No. 3, p. 1529 (Sep. 1992)

Frequency dependent heat generation during vibrothermographic testing of composite materials : Lin Shiangshin Dissertation Abstracts International, Vol. 48, No. 11, p. 3335 (May 1988)

Frequency dependent heat generation during vibrothermographic testing of composite materials : Lin Shiangshin Dissertation Abstracts International, Vol. 48, No. 11, p. 3335 (May 1988)

Acoustic emissions from fatigue cracks in steels: Dissertation Abstracts International, Vol. 49, No. 3, p. 875B (Sep. 1988)

Acoustic emissions from fatigue cracks in steels: Dissertation Abstracts International, Vol. 49, No. 3, p. 875B (Sep. 1988)

Tomographic reconstruction of sound fields of ultrasonic transducer by means of schlieren visualization techniques : Dissertation Abstracts International, Vol. 49, No. 4, p. 1215 (Oct. 1988)

Tomographic reconstruction of sound fields of ultrasonic transducer by means of schlieren visualization techniques : Dissertation Abstracts International, Vol. 49, No. 4, p. 1215 (Oct. 1988)

Image analysis, modeling, enhancement, restoration, feature extraction and their applications in nondestructive evaluation and radio astronomy : Dissertation Abstracts International, Vol. 49, No. 2, pp. 507 (Aug. 1988)

Image analysis, modeling, enhancement, restoration, feature extraction and their applications in nondestructive evaluation and radio astronomy : Dissertation Abstracts International, Vol. 49, No. 2, pp. 507 (Aug. 1988)

Model-based ultrasonic flaw classification and sizing : Dissertation Abstracts International, Vol. 51, No. 8, pp. 4013-B (Feb. 1991) (DA 9101339)

Model-based ultrasonic flaw classification and sizing : Dissertation Abstracts International, Vol. 51, No. 8, pp. 4013-B (Feb. 1991) (DA 9101339)

Transducer characterization in inhomogeneous media using the angular spectrum method : Dissertation Abstracts International, Vol. 49, No. 7, pp. 2691 (Jan. 1989)

Transducer characterization in inhomogeneous media using the angular spectrum method : Dissertation Abstracts International, Vol. 49, No. 7, pp. 2691 (Jan. 1989)

A knowledge-based automatic nondestructive test for CIMS using the eddy current method : Dissertation Abstracts International, Vol. 52, No. 6, pp. 3231-B (Dec. 1991) (DA9129334)

This dissertation presents a heuristic pattern recognition signal processing method to automate defect detection and classification processes. Testing is performed by the eddy current nondestructive testing technique. Eddy current testing consists of measuring impedance changes in a test coil caused by eddy currents induced in an electrically conductive material. The methodology presented in this dissertation utilizes an expert's knowledge in interpreting the impedance plane plots. Since this approach utilizes an expert's cognitive processes in impedance plane interpretation, its problem domain centers on representing the expert's knowledge. This is achieved through the knowledge engineering process. The knowledge engineering process involves two steps. One is detecting defects; the other is classifying defect types. The pseudo run-length test is performed to check the signal data randomness to detect defects. Then the classification process begins. Each defect type's signal features are extracted based on experiments to classify the defect types. The rules for both the defect detection and classification process are developed based on the feature extraction results. This approach is less difficult and expensive in developing a pattern recognition signal processing method for eddy current analysis in comparison to existing signal processing methods.

Selected AI-Related Dissertations Bibliography

The following are citations selected by title and abstract as being related to AI, resulting from a computer search, using BRS Information Technologies, of the Dissertation Abstracts Online database produced by University Microfilms International (UMI).The online file includes abstracts, which are not published in this listing, but the citations below do include reference to the published Dissertation Abstracts International (DAI), which contains the abstracts. Other elements of the citation are author; university, degree, and, if available, number of pages; title; UMI order number and year-month of DAI; and one or more DAI subject descriptors chosen by the author of the dissertation. The listing may include masters abstracts, denoted by MAI (Masters Abstracts International) instead of DAI. References are sorted by subject descriptor; in the event that there is more than one descriptor, the first is used. Within each descriptor, entries are sorted by author.Unless otherwise specified, paper or microform copies of dissertations may be ordered from University Microfilms International, Dissertation Copies, Post Office Box 1764, Ann Arbor, MI 48106; telephone for U.S. (except Michigan, Hawaii, Alaska): 1-800-521-3042, for Canada: 1-800-268-6090. Price lists and other ordering and shipping information are in the introduction to the published DAI. Agriculture, Forestry and Wildlife

Non-destructive testing of materials with the differential gamma scattering spectroscopy (DGSS) : Humphries, L.L. Dissertation Abstracts International, Vol. 51, No. 3, pp. 1470 (Sep. 1990) (DA 9021212)

Non-destructive testing of materials with the differential gamma scattering spectroscopy (DGSS) : Humphries, L.L. Dissertation Abstracts International, Vol. 51, No. 3, pp. 1470 (Sep. 1990) (DA 9021212)

Frequency dependent heat generation during vibrothermographic testing of composite materials : Lin Shiangshin Dissertation Abstracts International, Vol. 48, No. 11, p. 3335 (May 1988)

Frequency dependent heat generation during vibrothermographic testing of composite materials : Lin Shiangshin Dissertation Abstracts International, Vol. 48, No. 11, p. 3335 (May 1988)

Modal analysis for damage assessment in structures : Hearn, G. Dissertation Abstracts International Vol. 51, No. 3, pp. 1400 (Sep. 1990) (DA 9020540)

Modal analysis for damage assessment in structures : Hearn, G. Dissertation Abstracts International Vol. 51, No. 3, pp. 1400 (Sep. 1990) (DA 9020540)

41980 Damage assessment by acousto-ultrasonic technique in composites : Moon, S.M. Dissertation Abstracts International, Vol. 49, No. 11, p. 5001 (May 1989)

41980 Damage assessment by acousto-ultrasonic technique in composites : Moon, S.M. Dissertation Abstracts International, Vol. 49, No. 11, p. 5001 (May 1989)