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Relevant bibliographies by topics / Defect size estimation

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Academic literature on the topic 'Defect size estimation'

Author: Grafiati

Published: 10 December 2022

Last updated: 29 January 2023

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Journal articles on the topic "Defect size estimation"

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Moskovchenko, Alexey, Michal Švantner, Vladimir Vavilov, and Arsenii Chulkov. "Characterizing Depth of Defects with Low Size/Depth Aspect Ratio and Low Thermal Reflection by Using Pulsed IR Thermography." Materials 14, no. 8 (2021): 1886. http://dx.doi.org/10.3390/ma14081886.

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This study is focused on the quantitative estimation of defect depth by applying pulsed thermal nondestructive testing. The majority of known defect characterization techniques are based on 1D heat conduction solutions, thus being inappropriate for evaluating defects with low aspect ratios. A novel method for estimating defect depth is proposed by taking into account the phenomenon of 3D heat diffusion, finite lateral size of defects and the thermal reflection coefficient at the boundary between a host material and defects. The method is based on the combination of a known analytical model and

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Damaskinskaya, E. E., V. L. Hilarov, I. A. Panteleev, D. V. Korost, and K. A. Damaskinskii. "In-situ estimation of defect volume from parameters of acoustic emission signals." Journal of Physics: Conference Series 2103, no. 1 (2021): 012066. http://dx.doi.org/10.1088/1742-6596/2103/1/012066.

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Abstract By using two methods of nondestructive testing, i.e., acoustic emission (AE) measurements and X-ray computed microtomography (CT), an experimental study of defect accumulation during a uniaxial compression of a natural heterogeneous material was carried out. A joint analysis of the AE and CT data revealed a correspondence between energy characteristics of the acoustic emission accompanying defect formation and volume of defects. It is shown that the dependence of the total energy of AE signals on the defect volume is linear, which is consistent with the phenomenological dependences fo

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Al-Ghamdi, A. M., P. Cole, R. Such, and D. Mba. "Estimation of bearing defect size with acoustic emission." Insight - Non-Destructive Testing and Condition Monitoring 46, no. 12 (2004): 758–61. http://dx.doi.org/10.1784/insi.46.12.758.54491.

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Shim, Won Heum, Sejoong Rim, Sang Wook Lim, et al. "Estimation of Size of Adult Atrial Septal Defect." Korean Circulation Journal 26, no. 3 (1996): 631. http://dx.doi.org/10.4070/kcj.1996.26.3.631.

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Wang, Hong'an, and Guoming Chen. "Defect size estimation method for magnetic flux leakage signals using convolutional neural networks." Insight - Non-Destructive Testing and Condition Monitoring 62, no. 2 (2020): 86–90. http://dx.doi.org/10.1784/insi.2020.62.2.86.

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A method for defect size estimation of magnetic flux leakage (MFL) signals using convolutional neural networks (CNNs) is proposed to overcome the problem of quantitative identification of pipeline MFL testing. The model mainly includes two modules: defect classification and defect size regression. The former is used to realise data fusion, feature extraction and tasks of three components (axial, circumferential and radial) of the MFL defect signal. The defect size regression module includes seven CNNs, which realise the size estimation of different types of defect. The input is a different typ

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Nabhan, Ahmed, and Ahmed Rashed. "Experimental and numerical investigation of defect-size estimation in taper roller bearing." Noise & Vibration Worldwide 49, no. 11 (2018): 345–54. http://dx.doi.org/10.1177/0957456518801141.

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In this article, the estimation of different defect sizes present on the outer race of taper roller bearing confirms the effectiveness of the applied method for different vibration signals. Experiments and numerical model conducted for three primary conditions of bearing setting, which are positive, negative, and zero clearance. The outer race is installed in five different positions so that the defect located at 0°, 45°, 90°, 135°, and 180°. The output of the numerical model finds close correlation with the vibration signal pattern–obtained experiments. From the results, it is clear that defe

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Ciecieląg, Krzysztof, Krzysztof Kecik, and Kazimierz Zaleski. "Defects detection from time series of cutting force in composite milling process by recurrence analysis." Journal of Reinforced Plastics and Composites 39, no. 23-24 (2020): 890–901. http://dx.doi.org/10.1177/0731684420935985.

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The article presents possibility of defects detection from milling time series using nonlinear methods: recurrence plots and recurrence quantifications. The defects are modeled as the holes with different diameters and depths. This allows estimation of the minimal size of defect possible to detect. Based on the conducted research, it has been shown that some of the recurrence indicators enable detection of defects. These recurrence indicators have been tested on the reals damage. Additionally, we show influence of the defect depth on the recurrence indicator values.

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Wermers, Jens, Benedikt Schliemann, Michael J. Raschke, et al. "Glenoid concavity has a higher impact on shoulder stability than the size of a bony defect." Knee Surgery, Sports Traumatology, Arthroscopy 29, no. 8 (2021): 2631–39. http://dx.doi.org/10.1007/s00167-021-06562-3.

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Abstract Purpose Surgical treatment of shoulder instability caused by anterior glenoid bone loss is based on a critical threshold of the defect size. Recent studies indicate that the glenoid concavity is essential for glenohumeral stability. However, biomechanical proof of this principle is lacking. The aim of this study was to evaluate whether glenoid concavity allows a more precise assessment of glenohumeral stability than the defect size alone. Methods The stability ratio (SR) is a biomechanical estimate of glenohumeral stability. It is defined as the maximum dislocating force the joint can

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Chen, Aoyu, and Thomas R. Kurfess. "A new model for rolling element bearing defect size estimation." Measurement 114 (January 2018): 144–49. http://dx.doi.org/10.1016/j.measurement.2017.09.018.

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Vasseur, Julien, Dmytro Vasiukov, Salim Chaki, et al. "Fracture and determination of a lifetime of in-service mechanical components with porosity cluster in an aluminium alloy." MATEC Web of Conferences 300 (2019): 04001. http://dx.doi.org/10.1051/matecconf/201930004001.

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This paper focuses on the fatigue lifetime estimation of metallic components containing group of porosities as manufacturing defects. In order to represent these defects, six test specimens with different Side Drilled Holes (SDH) clusters, have been made of 7075-T6 aluminium alloy. Main characteristics of such defect (elementary size of porosities, spatial density or gradient of elementary sizes) have been studied by taking it into account in a FEM modelling in fatigue to determine their influence on the lifetime. Experimental tensile fatigue tests have been performed on all SDH samples with l

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Dissertations / Theses on the topic "Defect size estimation"

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Boyers, Albert S. "SPECT myocardial perfusion scans : a left ventricular defect size estimation algorithm and a three dimensional computer simulation." Diss., Georgia Institute of Technology, 1991. http://hdl.handle.net/1853/14879.

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Bin, Muhd Noor Nik Nooruhafidzi. "Statistical modelling of ECDA data for the prioritisation of defects on buried pipelines." Thesis, Brunel University, 2017. http://bura.brunel.ac.uk/handle/2438/16392.

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Buried pipelines are vulnerable to the threat of corrosion. Hence, they are normally coated with a protective coating to isolate the metal substrate from the surrounding environment with the addition of CP current being applied to the pipeline surface to halt any corrosion activity that might be taking place. With time, this barrier will deteriorate which could potentially lead to corrosion of the pipe. The External Corrosion Direct Assessment (ECDA) methodology was developed with the intention of upholding the structural integrity of pipelines. Above ground indirect inspection techniques such

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Dworak, Jennifer Lynn. "Modeling defective part level due to static and dynamic defects based upon site observation and excitation balance." Diss., Texas A&M University, 2004. http://hdl.handle.net/1969.1/323.

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Manufacture testing of digital integrated circuits is essential for high quality. However, exhaustive testing is impractical, and only a small subset of all possible test patterns (or test pattern pairs) may be applied. Thus, it is crucial to choose a subset that detects a high percentage of the defective parts and produces a low defective part level. Historically, test pattern generation has often been seen as a deterministic endeavor. Test sets are generated to deterministically ensure that a large percentage of the targeted faults are detected. However, many real defects do not behave like

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Moazen-ahmadi, Alireza. "Vibration signatures of defective bearings and defect size estimation methods." Thesis, 2016. http://hdl.handle.net/2440/112971.

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Rolling element bearings are widely used in rotary machinery, often with extremely demanding performance criteria. The failure of bearings is the most common reason for machine breakdowns. Machine failures can be catastrophic, resulting in costly downtime and sometimes in human casualties. The implementation of condition monitoring systems, which use data from various sources to determine the state of bearings, is commonly used to predict bearing failure. Hence, a considerable amount of attention has been devoted to bearing failure modes, fault detection, fault development and life expec

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Books on the topic "Defect size estimation"

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Schreuder, Michiel F. Renal hypoplasia. Edited by Adrian Woolf. Oxford University Press, 2015. http://dx.doi.org/10.1093/med/9780199592548.003.0348.

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In true renal hypoplasia, normal nephrons are formed but with a deficit in total numbers. As nephron number estimation is not possible in vivo, renal size is used as a marker. A widely used definition of renal hypoplasia is kidneys with a normal appearance on ultrasound but with a size less than two standard deviations below the mean for gender, age, and body size. A distinct and severe form of renal hypoplasia is called (congenital) oligomeganephronia, which is characterized by small but normal-shaped kidneys with a marked reduction in nephron numbers (to as low as 10–20% of normal), a distin

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Book chapters on the topic "Defect size estimation"

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Singhal, Shyam, Beulah Moses, and Veena Jadhav. "Generalizing Software Defect Estimation Using Size and Two Interaction Variables." In Handbook on Artificial Intelligence-Empowered Applied Software Engineering. Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-08202-3_4.

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Light, Paul C. "A Warning Renewed." In The Government-Industrial Complex. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780190851798.003.0001.

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Chapter 1 provides a broad history of Dwight D. Eisenhower’s 1961 farewell address and the author’s methodology for estimating the true size of the government-industrial complex workforce. The chapter begins with Eisenhower’s decision to deliver a nationally televised speech warning the nation of the grave threats created by the conjunction of an imperative, but immense military and armaments industry. The chapter explores the history of the speech and the president’s chosen words for characterizing the military-industrial complex. The chapter continues with a discussion of the method used for estimating the true size of the federal, contract, and grant workforces. The method converts federal spending into estimates of the full-time-equivalent contract and grant employment for use in side-by-side comparisons to the federal workforce. The chapter ends with a discussion of the data deficit surrounding the government-industrial complex and warns readers that all data have expiration dates, including the data used in the book.

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Rosell, Frank, and Róisín Campbell-Palmer. "Territoriality, communication, and populations." In Beavers. Oxford University Press, 2022. http://dx.doi.org/10.1093/oso/9780198835042.003.0007.

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Beavers are highly territorial and actively defend a territory that includes nutritional resources, one or more rest sites, a family overwintering site, and a reproduction site. New territories are normally established during early autumn when dispersing subadults settle down in a new area of their own, but this can vary considerably. Each family group scent marks its territories with castoreum and/or anal gland secretion. Territory size is generally measured as the length of shoreline but can also be expressed as a combination of terrestrial and aquatic patches used by the beavers in a two-dimensional space. The territorial size depends on many factors such as habitat quality and quantity, habitat type (stream, river, or pond), density of beavers, social factors (sex and age), time of year (season), and settlement pattern. Beavers patrol their territory to look out for intruders and potential predators and scent mark their territory with fluid from their castor sacs and/or secretions from their anal glands. Territorial defence can include direct fighting or even more unusual warning behaviours such as boundary stick displays. The duration of territory occupancy and its importance for the fitness of beavers are also discussed. Further, this chapter explores beaver communication using odours, sounds, tail slapping, poses, and other movements. Beavers predominantly communicate via odours, but the importance of all these modalities is explored. Lastly, population estimations, growth, fluctuations, and densities of beaver populations are discussed.

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Pon Bharathi, A., Allan J. Wilson, S. Arun, and V. Ramanathan. "A Compact Disc Shaped Microstrip Patch Antenna Using Inset Fed at 5GHz for Satellite Communications." In Recent Trends in Intensive Computing. IOS Press, 2021. http://dx.doi.org/10.3233/apc210181.

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This examination work is focused around planning and simulating another kind of inset feed Disc Shaped Microstrip Patch Antenna (DSMPA) with Inset feed and Defected ground plane (DGP). By presenting a round space at the focal point of the ground plane, improved attributes of Microstrip patch antenna can be accomplished. The proposed Disc Shaped Microstrip patch antenna is reverberating at 5 GHz. Simulation has been finished by utilizing reenactment programming HFSS version15. From recreation results, it discovers that our examined Disc Shaped Microstrip patch antenna yields better return loss of - 25.1 dB & VSWR estimation of 0.96 dB. The examined DSMPA is yielding a higher radiation efficiency of 77.20 %. The minimized size and higher radiation efficiency contrasted with rectangular Microstrip patch antenna makes it all the more generally helpful for satellite communications.

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Conference papers on the topic "Defect size estimation"

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Murthy, Aravind N., Karl A. Flechsig, Wes Hillman, Keith Conard, and Remmelt Pit. "Thermal Fly-Height Controlled Glide for Disk Defect Detection and In-Situ Defect Size Estimation for Disk Drives." In ASME 2013 Conference on Information Storage and Processing Systems. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/isps2013-2805.

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Current hard disk drives (HDD’s) use thermal fly-height control (TFC) during read/write operations. In this study, we use TFC technology during the disk glide process to determine sub-5nm height defects. We also utilize TFC to measure the height of the defect during glide operation. Addtionally, we magnetically mark the disk locations where defects are detected for further post-processing of the defects using optical surface analysis (OSA), atomic force microscopy (AFM), and scanning electron microscopy (SEM). The defect height estimation during the glide was confirmed to be accurate by AFM an

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Revel, Gian Marco, Giuseppe Pandarese, and Gloria Allevi. "Quantitative defect size estimation in shearography inspection by wavelet transform and shear correction." In 2017 IEEE International Workshop on Metrology for AeroSpace (MetroAeroSpace). IEEE, 2017. http://dx.doi.org/10.1109/metroaerospace.2017.7999631.

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Chen, Jenny Jing, Stephen Westwood, and David Heaney. "A Feature-Specific Probabilistic Assessment of Pipeline Defect Size From ILI MFL Signal Using Convolutional Neural Network." In 2020 13th International Pipeline Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/ipc2020-9331.

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Abstract When estimating pipeline burst pressure, one of the prevalent sources of uncertainty that needs to be factored into the calculation is the model error in the estimation of feature depth and length from the in-line inspection tool. Due to modeling technique limitation, as of today many ILI vendors have feature specific error bounds depending on the morphologies of the corrosion, this error can only be reported to operators as an overall error known as the ILI tool tolerance which is usually obtained from samples of excavation data or pull test data. At the most, the error is reported b

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Gautier, S., and L. Cha˜tellier. "A Help for Lifetime Management: Defect Characterisation Through Signal Processing of Ultrasonic Data." In ASME 2003 Pressure Vessels and Piping Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/pvp2003-2159.

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So as to detect and to characterize potential defects on cast components, a program of in-service inspections is carried out for the non destructive evaluation (NDE) of the component. A first step of inspection usually consists in detection. Still, should a defect be detected, one can be asked to prove the component still stands the mechanical constraints. Then, it is very important to be able to characterize precisely the size and the position of the defect. In the studied case, we concentrate on planar defects which are to be characterized from ultrasonic. The estimation of the height consis

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Feng, Tie, Cunlin Zhang, and Lichun Feng. "The effect of depth on the quantitative estimation of defect size using pulsed thermography." In International Symposium on Photoelectronic Detection and Imaging 2011. SPIE, 2011. http://dx.doi.org/10.1117/12.900752.

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Yoshikawa, Takao, Masahiro Maeda, and Hideyuki Hirasawa. "A Study on Construction of Evaluation Method for Defect Sizing Utilizing Numerical Simulation." In ASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2011. http://dx.doi.org/10.1115/omae2011-49349.

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To prevent the brittle fracture of the extremely thick plate which is used in the deck plate and the hatch side coaming of the large container ships, it is important to detect surely and repair the inner defects, which are possible to lead the brittle fracture at an early stage. Now Ultrasonic Testing is used in order to inspect the inner defect in a thick plate, and it is necessary to select adequately the probe size and oscillating frequency to evaluate the defect size accurately. The estimation of the defect size in vertical direction to plate surface is important from the viewpoint of fati

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Mu, Rangke, and Chun-sheng Zhao. "A New Method for the Pile Quality Detection: Estimation of the Shape of a Pile." In ASME 1991 Design Technical Conferences. American Society of Mechanical Engineers, 1991. http://dx.doi.org/10.1115/detc1991-0373.

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Abstract In this paper, a new method for the pile quality detection is developed, which is the Estimation of the Shape of a pile (also called the ESP method). It has considered many defects and their high time reflections in a pile by using echo technique. At this we have carried out the computer simulation and the field tests by transient impact excitation on the head of the pile. It is proved that the ESP method is feasible for the pile quality detection, and the size, type, and site of a defect in a pile can be accurately determined by using it.

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Fazeli, Hamid, Masoud Mirzaei, and Pourya Forooghi. "Estimation of Location and Size of Defects in a Solid Body via Inverse Heat Conduction Problem." In 2010 14th International Heat Transfer Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/ihtc14-23075.

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In the present paper, geometry specification in the inverse heat conduction problems (IHCP) is applied to detect the location and size of defect in a solid body. A crack or cavity is modeled as a supper-elliptic geometry whose parameters are estimated with inverse heat conduction problems. Both inverse analysis and gradient-based optimization method have been applied to an inverse algorithm that iteratively estimates the defect shape parameters. The inverse analysis is based on recording temperatures data on outer surface of solid domain that determines the objective function in the inverse al

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Manohar, Arun, and Francesco Lanza di Scalea. "Modeling Heat Flow Interaction With Defects in Composite Materials Using Virtual Heat Sources in Pulsed Thermography." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-62568.

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Quantitative defect detection in composite structures is an important problem as the aerospace and wind energy industries are increasingly using composites due to their attractive properties. Newer aircraft contain over 50% composites, while the wind turbine blades contain over 95% composites. Quantitative estimation of defect parameters is relevant to perform repairs and assess the integrity of these structures. Previous studies are based on simple 1D heat conduction models, which are inadequate in predicting heat flow around defects, especially in composites where the ratio of longitudinal t

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Orynyak, Igor, Maksym Zarazovskii, and Mykhaylo Borodii. "The Method for Structural Reliability Estimation of the Heat Exchanger Tubes of Steam Generator of WWER NPPs." In ASME 2016 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/pvp2016-63710.

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After the replacement due to the well known problem of weld seam #111 the steam generators (SG) of the Ukrainian WWER-1000 type nuclear power plants (NPP) have been in operation for almost 25 years. So now, the main practical problem related to the SG is the leakage/breaking of heat exchanger tubes (HET). If the leakage criterion is not satisfied the NPP Unit has to be stopped until the corresponding HET is plugged, which leads to unexpected huge financial losses. Every year at least 12.5% of the SG HETs are controlled by eddy current inspection, after which some of the HETs are plugged accord

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Reports on the topic "Defect size estimation"

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Engel, Bernard, Yael Edan, James Simon, Hanoch Pasternak, and Shimon Edelman. Neural Networks for Quality Sorting of Agricultural Produce. United States Department of Agriculture, 1996. http://dx.doi.org/10.32747/1996.7613033.bard.

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The objectives of this project were to develop procedures and models, based on neural networks, for quality sorting of agricultural produce. Two research teams, one in Purdue University and the other in Israel, coordinated their research efforts on different aspects of each objective utilizing both melons and tomatoes as case studies. At Purdue: An expert system was developed to measure variances in human grading. Data were acquired from eight sensors: vision, two firmness sensors (destructive and nondestructive), chlorophyll from fluorescence, color sensor, electronic sniffer for odor detecti

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Financial Stability Report - September 2015. Banco de la República, 2021. http://dx.doi.org/10.32468/rept-estab-fin.sem2.eng-2015.

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From this edition, the Financial Stability Report will have fewer pages with some changes in its structure. The purpose of this change is to present the most relevant facts of the financial system and their implications on the financial stability. This allows displaying the analysis more concisely and clearly, as it will focus on describing the evolution of the variables that have the greatest impact on the performance of the financial system, for estimating then the effect of a possible materialization of these risks on the financial health of the institutions. The changing dynamics of the ri

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