Bibliografie tematiche / Geometry fusion

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Letteratura scientifica selezionata sul tema "Geometry fusion"

Autore: Grafiati

Pubblicato: 7 luglio 2024

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Articoli di riviste sul tema "Geometry fusion"

Gepner, Doron. "Fusion rings and geometry." Communications in Mathematical Physics 141, no. 2 (1991): 381–411. http://dx.doi.org/10.1007/bf02101511.

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Siler, Todd. "Fractal Reactor: Re-Creating the Sun." Leonardo 40, no. 3 (2007): 270–78. http://dx.doi.org/10.1162/leon.2007.40.3.270.

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The author recounts his quest to design an alternative plasma fusion device that could generate limitless energy through nuclear fusion. The proposed Fractal Reactor is based on fractal geometry rather than the Euclidean geometry used in the designs for the containment systems of plasma fusion devices. Fusion energy systems might become more effective if they more closely embody the geometry and physics of stars, nature's “fractal reactors.” The author aims to work with nature and not against it in controlling the forces that govern burning plasmas. Instead of jamming the square peg of Euclidean geometry into the round hole of fractal geometry, the author considers exerting intense forces on plasmas that approximate the gravitational forces in a star.

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Basko, M. M., M. D. Churazov, A. Kemp, and J. Meyer-ter-Vehn. "Magnetized target fusion in cylindrical geometry." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 464, no. 1-3 (2001): 196–200. http://dx.doi.org/10.1016/s0168-9002(01)00033-x.

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Szepesvári, Csaba, and András Lőrincz. "Approximate geometry representations and sensory fusion." Neurocomputing 12, no. 2-3 (1996): 267–87. http://dx.doi.org/10.1016/0925-2312(95)00116-6.

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Li, Yuhan, Yishun Dou, Yue Shi, et al. "FocalDreamer: Text-Driven 3D Editing via Focal-Fusion Assembly." Proceedings of the AAAI Conference on Artificial Intelligence 38, no. 4 (2024): 3279–87. http://dx.doi.org/10.1609/aaai.v38i4.28113.

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While text-3D editing has made significant strides in leveraging score distillation sampling, emerging approaches still fall short in delivering separable, precise and consistent outcomes that are vital to content creation. In response, we introduce FocalDreamer, a framework that merges base shape with editable parts according to text prompts for fine-grained editing within desired regions. Specifically, equipped with geometry union and dual-path rendering, FocalDreamer assembles independent 3D parts into a complete object, tailored for convenient instance reuse and part-wise control. We propose geometric focal loss and style consistency regularization, which encourage focal fusion and congruent overall appearance. Furthermore, FocalDreamer generates high-fidelity geometry and PBR textures which are compatible with widely-used graphics engines. Extensive experiments have highlighted the superior editing capabilities of FocalDreamer in both quantitative and qualitative evaluations.

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Wang, Yuan, Haonan Wang, and Louis L. Scharf. "The geometry of fusion inspired channel design." Signal Processing 99 (June 2014): 136–46. http://dx.doi.org/10.1016/j.sigpro.2013.12.015.

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Knapp, Daniel R. "Planar geometry inertial electrostatic confinement fusion device." Journal of Physics: Conference Series 591 (March 24, 2015): 012018. http://dx.doi.org/10.1088/1742-6596/591/1/012018.

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Dubrovin, B. "Geometry and integrability of topological-antitopological fusion." Communications in Mathematical Physics 152, no. 3 (1993): 539–64. http://dx.doi.org/10.1007/bf02096618.

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Tang, Chengkai, Yuyang Wang, Lingling Zhang, Yi Zhang, and Houbing Song. "Multisource Fusion UAV Cluster Cooperative Positioning Using Information Geometry." Remote Sensing 14, no. 21 (2022): 5491. http://dx.doi.org/10.3390/rs14215491.

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Due to the functional limitations of a single UAV, UAV clusters have become an important part of smart cities, and the relative positioning between UAVs is the core difficulty in UAV cluster applications. Existing UAVs can be equipped with satellite navigation, radio navigation, and other positioning equipment, but in complex environments, such as urban canyons, various navigation sources cannot achieve full positioning information due to occlusion, interference, and other factors, and existing positioning fusion methods cannot meet the requirements of these environments. Therefore, demand exists for the real-time positioning of UAV clusters. Aiming to solve the above problems, this paper proposes multisource fusion UAV cluster cooperative positioning using information geometry (UCP-IG), which converts various types of navigation source information into information geometric probability models and reduces the impact of accidental errors, and proposes the Kullback–Leibler divergence minimization (KLM) fusion method to achieve rapid fusion on geometric manifolds and creatively solve the problem of difficult fusion caused by different positioning information formats and parameters. The method proposed in this paper is compared with the main synergistic methods, such as LS and neural networks, in an ideal scenario, a mutation error scenario, and a random motion scenario. The simulation results show that by using UAV cluster movement, the method proposed in this paper can effectively suppress mutation errors and achieve fast positioning.

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Holland, Kitty L. "An introduction to fusion of strongly minimal sets: The geometry of fusions." Archive for Mathematical Logic 34, no. 6 (1995): 395–413. http://dx.doi.org/10.1007/s001530050031.

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Tesi sul tema "Geometry fusion"

Builth-Williams, Joseph Douglas. "Geometrically and Reflectively Enhanced Embedded Fusion." Thesis, University of Sydney, 2020. https://hdl.handle.net/2123/23256.

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Inertial Electrostatic Confinement (IEC) fusion is a technique that uses electrostatic fields to confine and heat ions in order to achieve nuclear fusion. This is achieved by using a metal grid as the cathode to create the confining electrostatic well. There have been unpublished suggestions that the materials and geometry of the cathode have an effect on the fusion rate. A systematic experimental study is carried out on a range of non-standard cathode geometries and materials in an IEC fusion device under low energy conditions to challenge the commonly accepted notion that a more highly transparent grid is the most efficient means of fusion neutron production. A number of hollow cathode geometries were exposed to a range of different pressures, voltages, and currents, which were compared to an IEC grid under the same conditions. The cathode surface temperature and ion energy distribution in the plasma were used to correlate the fusion rate associated with the temperature and plasma properties. It was found that the hollow cathodes operating under the abnormal discharge conditions produced more neutrons than an IEC grid. A model using ambipolar diffusion and sheath terms was developed. A study into the material dependence of the cathodes was performed using stainless steel as the control group. Graphite was found to produce an order of magnitude more neutrons than stainless steel. A model was presented that showed a qualitative trend for all metallic samples that correlated with the experimental results. However the anomalous results from graphite proved to be more elusive. Finally, a cathode that combined both the most efficient geometry and material was studied. The graphite biconical cathode was found to have a higher fusion rate than the sum of its parts. This study represents the first of its kind focusing on the effects of material and cathode geometry under low energy discharge conditions on the neutron production rate.

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JUNIOR, ANTONIO CESAR PINHO BRASIL. "HEAT TRANSFER DURING THE FUSION IN A VERTICAL CYLINDRICAL GEOMETRY." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 1985. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=33303@1.

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COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR<br>CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO<br>Uma análise experimental é desenvolvida para avaliação da transferência de calor durante a fusão ao redor de um cilindro isotérmico vertical imerso em um meio de mudança de fase. A posição e forma da interface sólido-líquido é determinada como função do tempo, para diferentes temperaturas do cilindro. A relação altura/diâmetro é de cinco, para comparação com resultados já existentes. A faixa de Número de Stefan investigado foi de 0,017 a 0,33 o que equivale a uma faixa de Número Rayleigh de 7x10 elevado a quarta potência a 2x10 elevado a sexta potência. Os dados obtidos foram utilizados para a determinação dos números de Nusselt locais na interface e médios para a superfície do cilindro. A dependência da massa fundida com o tempo foi também determinada, parametrizada por Rayleigh. Soluções do problema de fusão sem os efeitos de convecção natural (Problema tipo STEFAN) foram obtidos via método de elementos finitos e estes resultados foram comparados com os dados experimentais obtidos. Isto permitiu a determinação do tempo quando os efeitos de convecção natural tornam-se importantes. Comparações com resultados numéricos publicados, para a mesma condição física, foram desenvolvidas obtendo excelentes concordâncias.<br>An experimental investigation was performed to determine heat transfer coefficients during the outward melting of a phase-change material (PCM),maintained at its fusion temperature, around an isothermal cylinder positioned vertically. The position and shape of the Solid-liquid interface were determined as a function of time, for diferent temperatures of the cylinder. The ratio height-to-diameter of the cylinder was chosen to be five, in order to allow comparisons with available results. The Stefan number range investigated was 0,017 - 0,33 corresponding to a Rayleigh number variation from 7x10 to the fourth power to 2x10 to the sixth power. The data obtained was used in the determination of local Nusselt numbers for the interface and average Nusselt numbers for cylinder surface. The dependence of the molten mass on time was also determined, for several combinations of the relevant parameters. Solutions of the axisymmetric melting problem without natural convection effects (Stefan-like problem) were obtained via finite-element analysis. These numerical results were compared with the experimental data, which permitted the determination of times when the natural convection effects in the liquid region become of importance. The experimental data were compared with the results of an available numerical analysis of the same physical situation, and excellent agreement was obtained.

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Durbin, Samuel Glen. "Dynamics and free-surface geometry of turbulent liquid sheets." Available online, Georgia Institute of Technology, 2005:, 2005. http://etd.gatech.edu/theses/available/etd-03032005-095517/unrestricted/Durbin%5FSamuel%5FG%5F200505%5Fphd.pdf.

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Thesis (Ph. D.)--Mechanical Engineering, Georgia Institute of Technology, 2005.<br>Minami Yoda, Committee Co-Chair ; Said I. Abdel-Khalik, Committee Co-Chair ; S. Mostafa Ghiaasiaan, Committee Member ; Cyrus K. Aidun, Committee Member ; Donald R. Webster, Committee Member ; Ralph W. Moir, Committee Member. Includes bibliographical references.

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Abdullah, Ramli Bin. "Bond behaviour of fusion bonded epoxy coated reinforcement : influence of bar rib geometry." Thesis, Heriot-Watt University, 1992. http://hdl.handle.net/10399/805.

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Aguilar, Quiñones Valeria. "Impact of Viral Geometry and Cellular Lipid Environment on Virus-Endosome Fusion Kinetics." Thesis, Uppsala universitet, Institutionen för medicinsk biokemi och mikrobiologi, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-446545.

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Wang, Chao. "Point clouds and thermal data fusion for automated gbXML-based building geometry model generation." Diss., Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/54008.

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Existing residential and small commercial buildings now represent the greatest opportunity to improve building energy efficiency. Building energy simulation analysis is becoming increasingly important because the analysis results can assist the decision makers to make decisions on improving building energy efficiency and reducing environmental impacts. However, manually measuring as-is conditions of building envelops including geometry and thermal value is still a labor-intensive, costly, and slow process. Thus, the primary objective of this research was to automatically collect and extract the as-is geometry and thermal data of the building envelope components and create a gbXML-based building geometry model. In the proposed methodology, a rapid and low-cost data collection hardware system was designed by integrating 3D laser scanners and an infrared (IR) camera. Secondly, several algorithms were created to automatically recognize various components of building envelope as objects from collected raw data. The extracted 3D semantic geometric model was then automatically saved as an industry standard file format for data interoperability. The feasibility of the proposed method was validated through three case studies. The contributions of this research include 1) a customized low-cost hybrid data collection system development to fuse various data into a thermal point cloud; 2) an automatic method of extracting building envelope components and its geometry data to generate gbXML-based building geometry model. The broader impacts of this research are that it could offer a new way to collect as is building data without impeding occupants’ daily life, and provide an easier way for laypeople to understand the energy performance of their buildings via 3D thermal point cloud visualization.

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Gallo, Alberto. "Impact of the plasma geometry on the divertor power exhaust in a magnetic fusion reactor." Thesis, Aix-Marseille, 2018. http://www.theses.fr/2018AIXM0001/document.

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Une compréhension profonde du transport du plasma au bord d'un réacteur à fusion par confinement magnétique est obligatoire pour gérer l'extraction de puissance. Dans les dispositifs de fusion de nouvelle génération, des limites technologiques contraignent le flux de chaleur maximal au divertor. Pour une puissance d'échappement donnée le flux de chaleur maximal est déterminé par l'amplitude de l'empreinte du plasma au mur. Les profils de flux de chaleur au divertor peuvent être paramétrés par deux échelles de longueur du transport. Nous remettons en question l'interprétation actuelle de ces deux échelles de longueur en étudiant l'impact de la géométrie du divertor sur l'échappement. En particulier, un élargissement des profils de flux de chaleur avec la longueur de la jambe du divertor externe est diagnostiqué. Des efforts de modélisation ont montré que les simulations diffusives reproduisent les profils expérimentaux de flux de chaleur pour les plasmas à jambes courtes. Inversement, l'étalement du flux de chaleur pour une longe jambe du divertor est reproduit par un modèle turbulent, soulignant l'importance de la turbulence aussi dans le divertor. Ces résultats remettent en question l'interprétation de la largeur du flux de chaleur comme grandeur liée a la main SOL uniquement. Les configurations magnétiques avec une longe jambe du divertor mettent en évidence l'importance du transport asymétrique dans le divertor. Nous concluons que le transport dans la main SOL et celui dans le divertor ne sont pas à découpler et nous soulignons l'importance de la géométrie magnétique sur le transport turbulent avec l'avantage potentiel d'un inattendu étalement du dépôt de puissance<br>A deep understanding of plasma transport at the edge of a magnetically confined fusion device is mandatory for a sustainable and controlled handling of the power exhaust. In the next-generation fusion device ITER, technological limits constrain the peak heat flux on the divertor. For a given exhaust power the peak heat flux is determined by the extent of the plasma footprint on the wall. Heat flux profiles at the divertor targets of X-point configurations can be parametrized by using two length scales for the transport of heat in SOL. In this work, we challenge the current interpretation of these two length scales by studying the impact of divertor geometry modifications on the heat exhaust. In particular, a significant broadening of the heat flux profiles at the outer divertor target is diagnosed while increasing the length of the outer divertor leg. Modelling efforts showed that diffusive simulations well reproduce the experimental heat flux profiles for short-legged plasmas. Conversely, the broadening of the heat flux for a long divertor leg is reproduced by a turbulent model, highlighting the importance of turbulent transport not only in the main SOL but also in the divertor. These results question the current interpretation of the heat flux width as a purely main SOL transport length scale. In fact, long divertor leg magnetic configurations highlighted the importance of asymmetric divertor transport. We therefore conclude that main SOL and divertor SOL transport cannot be arbitrarily disentangled and we underline the importance of the divertor magnetic geometry in enhancing asymmetric turbulent transport with the potential benefit of an unexpected power spreading

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Gallo, Alberto. "Impact of the plasma geometry on the divertor power exhaust in a magnetic fusion reactor." Electronic Thesis or Diss., Aix-Marseille, 2018. http://www.theses.fr/2018AIXM0001.

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Fay, Robert H. "Application of the Fusion Model for Cognitive Diagnostic Assessment with Non-diagnostic Algebra-Geometry Readiness Test Data." Scholar Commons, 2018. https://scholarcommons.usf.edu/etd/7285.

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This study retrofitted a Diagnostic Classification Model (DCM) known as the Fusion model onto non-diagnostic test data from of the University of Chicago School Mathematics Project (UCSMP) Algebra and Geometry Readiness test post-test used with Transition Mathematics (Third Edition, Field-Trial Version). The test contained 24 multiple-choice middle school math items, and was originally given to 95 advanced 6th grade and 293 7th grade students. The use of these test answers for this study was an attempt to show that by using cognitive diagnostic analysis techniques on test items not constructed for that purpose, highly predictable multidimensional cognitive attribute profiles for each test taker could be obtained. These profiles delineated whether a given test taker was a master or non-master for each attribute measured by the test, thus allowing detailed diagnostic feedback to be disseminated to both the test takers and their teachers. The full version of the non-compensatory Fusion model, specifically, along with the Arpeggio software package, was used to estimate test taker profiles on each of the four cognitive attributes found to be intrinsic to the items on this test, because it handled both slips and guesses by test takers and accounted for residual skills not defined by the four attributes and twenty-four items in the Q-matrix. The attributes, one or more of which was needed to correctly answer an item, were defined as: Skills— those procedures that students should master with fluency; e.g., multiplying positive and negative numbers; Properties—which deal with the principles underlying the mathematics concepts being studied, such as being able to recognize and use the Repeated-Addition Property of Multiplication; Uses—which deal with applications of mathematics in real situations ranging from routine "word problems" to the development and use of mathematical models, like finding unknowns in real situations involving multiplication; and, Representations—which deal with pictures, graphs, or objects that illustrate concepts. Ultimately, a Q-matrix was developed from the rating of four content experts, with the attributes needed to answer each item clearly delineated. A validation of this Q-matrix was obtained from the Fusion model Arpeggio application to the data as test taker profiles showed which attributes were mastered by each test taker and which weren’t. Masters of the attributes needed to be acquired to successfully answer a test item had a proportion-correct difference from non-masters of .44, on average. Regression analysis produced an R-squared of .89 for the prediction of total scores on the test items by the attribute mastery probabilities obtained from the Fusion model with the final Q-matrix. Limitations of the study are discussed, along with reasons for the significance of the study.

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Walker, Joseph R. "Multi-Sensor Approach to Determine the Effect of Geometry on Microstructure in Additive Manufacturing." Wright State University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=wright1558900598369986.

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Libri sul tema "Geometry fusion"

Hasse, Rainer W. Geometrical Relationships of Macroscopic Nuclear Physics. Springer Berlin Heidelberg, 1988.

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Pohl, Christine. Geometric aspects of multisensor image fusion for topographic map updating in the humid tropics. International Institute for Aerospace Survey and Earth Sciences, 1996.

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Capitoli di libri sul tema "Geometry fusion"

Miley, George H., and S. Krupakar Murali. "Effect of Grid Geometry on IEC Performance." In Inertial Electrostatic Confinement (IEC) Fusion. Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-9338-9_6.

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Cousty, Jean, Gilles Bertrand, Michel Couprie, and Laurent Najman. "Fusion Graphs, Region Merging and Watersheds." In Discrete Geometry for Computer Imagery. Springer Berlin Heidelberg, 2006. http://dx.doi.org/10.1007/11907350_29.

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Wang, Rong, Zhi Xiong, and Jianye Liu. "Collaborative Geometry Optimization in Resilient Navigation." In Resilient Fusion Navigation Techniques: Collaboration in Swarm. Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-8371-9_6.

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Pechtel, Dag, and Kuhnert Klaus-Dieter. "Towards Feature Fusion - The Synthesis of Contour Sections Distinguishing Contours from Different Classes." In Discrete Geometry for Computer Imagery. Springer Berlin Heidelberg, 2000. http://dx.doi.org/10.1007/3-540-44438-6_42.

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Micucci, Monica, and Antonio Iula. "Fusion Analysis of a Palmprint-Hand Geometry Multimodal Ultrasound Recognition System." In Lecture Notes in Electrical Engineering. Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-25706-3_25.

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El-Alfy, El-Sayed M., and Galal M. BinMakhashen. "Improved Personal Identification Using Face and Hand Geometry Fusion and Support Vector Machines." In Networked Digital Technologies. Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-30567-2_21.

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Chen, Boan, Aohan Hu, Mengjie Xie, Zhi Gao, Xuhui Zhao, and Han Yi. "A Hierarchical Geometry-to-Semantic Fusion GNN Framework for Earth Surface Anomalies Detection." In Advances in Brain Inspired Cognitive Systems. Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-97-1417-9_6.

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Wen, Lijuan, Zhiyi Qu, and Lei Shi. "A New Depth Extraction Method Based on Fusion of Motion Information and Geometry Information." In Proceedings of the 2012 International Conference on Communication, Electronics and Automation Engineering. Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-31698-2_41.

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Fischer, Felix Gabriel, Niklas Birk, Tim Gerrit Lücke, and Niklas Praetzsch. "Detection of the Part Geometry in Laser Powder Bed Fusion Using Layer-Wise Images." In Progress in Additive Manufacturing 2021. ASTM International, 2022. http://dx.doi.org/10.1520/stp164420210131.

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Greiner, Sandra, Samuel Schlicht, and Dietmar Drummer. "Understanding Geometry Dependent Temperature Fields in Laser Powder Bed Fusion of PA12 by Means of Infrared Thermal Imaging." In Additive Manufacturing in Multidisciplinary Cooperation and Production. Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-37671-9_2.

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Atti di convegni sul tema "Geometry fusion"

Yazici, Sevil. "Efficiency in Architectural Geometry Informed by Materials." In eCAADe 2014: Fusion. eCAADe, 2014. http://dx.doi.org/10.52842/conf.ecaade.2014.1.547.

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Yazici, Sevil. "Efficiency in Architectural Geometry Informed by Materials." In eCAADe 2014: Fusion. eCAADe, 2014. http://dx.doi.org/10.52842/conf.ecaade.2014.1.547.

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Xuezhi Wang, Yongqiang Cheng, and B. Moran. "Bearings-only tracking analysis via information geometry." In 2010 13th International Conference on Information Fusion (FUSION 2010). IEEE, 2010. http://dx.doi.org/10.1109/icif.2010.5711965.

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Mishchenko, A., P. Helander, A. Könies, Olivier Sauter, Xavier Garbet, and Elio Sindoni. "Collisionless dynamics of zonal flows in stellarator geometry." In THEORY OF FUSION PLASMAS. AIP, 2008. http://dx.doi.org/10.1063/1.3033700.

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Li, Kailai, Florian Pfaff, and Uwe D. Hanebeck. "Hyperspherical Deterministic Sampling Based on Riemannian Geometry for Improved Nonlinear Bingham Filtering." In 2019 22th International Conference on Information Fusion (FUSION). IEEE, 2019. http://dx.doi.org/10.23919/fusion43075.2019.9011390.

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Li, Zhonggang, and Raj Thilak Rajan. "Geometry-Aware Distributed Kalman Filtering for Affine Formation Control under Observation Losses." In 2023 26th International Conference on Information Fusion (FUSION). IEEE, 2023. http://dx.doi.org/10.23919/fusion52260.2023.10224101.

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Kadar, Ivan. "Optimum geometry selection for sensor fusion." In Aerospace/Defense Sensing and Controls, edited by Ivan Kadar. SPIE, 1998. http://dx.doi.org/10.1117/12.327141.

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Sedrez, Maycon, Rafael Meneghel, and Gabriela Celani. "Digital fabrication of a brise-soleil using fractal geometry as generative system." In eCAADe 2014: Fusion. eCAADe, 2014. http://dx.doi.org/10.52842/conf.ecaade.2014.2.315.

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Mallick, M., S. Arulampalam, Yanjun Yan, and A. Mallick. "Connection between differential geometry and estimation theory for polynomial nonlinearity in 2D." In 2010 13th International Conference on Information Fusion (FUSION 2010). IEEE, 2010. http://dx.doi.org/10.1109/icif.2010.5712084.

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Rao, Nageswara S. V., Xiaochun Xu, and Sartaj Sahni. "A computational geometry method for DTOA triangulation." In 2007 10th International Conference on Information Fusion. IEEE, 2007. http://dx.doi.org/10.1109/icif.2007.4408050.

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Rapporti di organizzazioni sul tema "Geometry fusion"

King, Wayne. Process Control for Defect Mitigation in Laser Powder Bed Fusion Additive Manufacturing. SAE International, 2023. http://dx.doi.org/10.4271/epr2023011.

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<div class="section abstract"><div class="htmlview paragraph">Success in metal additive manufacturing (AM) relies on the optimization of a large set of process parameters to achieve materials whose properties and performance meet design and safety requirements. Despite continuous improvements in the process over the years, the quality of AM parts remains a major concern for manufacturers. Today, researchers are starting to move from discrete geometry-dependent build parameters to continuously variable or dynamically changing parameters that are geometry- and scan-path aware. This approach has become known as “feedforward control.”</div><div class="htmlview paragraph"><b>Process Control for Defect Mitigation in Laser Powder Bed Fusion Additive Manufacturing</b> discusses the origins of feedforward control, its early implementations in AM, the current state of the art, and a path forward to its broader adoption.</div><div class="htmlview paragraph"><a href="https://www.sae.org/publications/edge-research-reports" target="_blank">Click here to access the full SAE EDGE</a><sup>TM</sup><a href="https://www.sae.org/publications/edge-research-reports" target="_blank"> Research Report portfolio.</a></div></div>

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Wolff, Lawrence B. Differential Geometric Tools for Image Sensor Fusion. Defense Technical Information Center, 1999. http://dx.doi.org/10.21236/ada386912.

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Cheng, P., Th Toutin, and Y. Zhang. QuickBird - Geometric Correction, Data Fusion, and Automatic DEM Extraction. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2003. http://dx.doi.org/10.4095/220067.

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Miller, Mr Michael J. DTPH56-06-T-000017 In-Field Welding and Coating Protocols. Pipeline Research Council International, Inc. (PRCI), 2009. http://dx.doi.org/10.55274/r0012117.

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Gas Technology Institute (GTI) and Edison Welding Institute (EWI) created both laboratory and infield girth weld samples to evaluate the effects of weld geometry and hydrogen off-gassing on the performance of protective coatings. Laboratory-made plate welds were used to tightly control geometric differences and in-field welds were created to mimic real-world welding conditions and hydrogen off-gassing rates. These welds were then coated and tested with accelerated corrosion techniques to evaluate the coatings' effectiveness. Simulated girth welds investigated geometric effects on the performance of a liquid-applied coating. Welds were created, coated, and testing in a salt-fog environment to accelerate corrosion. Undercuts up to 0.03 inches were found to have no significant effect on coatings' resistance to corrosion. On the contrary, the undercut tended to add to the coating thickness and therefore increased corrosion resistance. Increasing cap height of a weld was found to thin the coating making it more susceptible to chipping but no more susceptible to corrosion. If applying proper coating procedures, especially surface profiling, the weld geometries investigated here had no strong negative effects on a liquid applied two-part epoxy coating's performance. Since fusion-bonded epoxy (FBE) coatings are applied in a different manner, these results cannot be extended from liquid to FBE coatings. If the FBE provides the same wetting of the undercut and similar coating thickness on the cap height one would expect similar results. In-field welds were created to test the effects of hydrogen off-gassing on coating performance. Two different welding mediums were used, one with a high hydrogen content and one with low hydrogen content. These different welds were then held for 2 or 5 hours to vary the amount of time allowed for hydrogen off-gassing and then coated in either FBE or a liquid 2 part epoxy. All other variables were held constant. Cross-sectional analysis of coated 24-inch diameter pipes showed no increase of voids above the welded area, indicating there was little off-gassing in these samples. Cathodic Disbondment Testing, per ASTM G-95, was performed to evaluate the coating's adhesion properties. No detectable adhesion differences were found that could be attributed to the hydrogen off-gassing from the weld, instead, the results were more dependent on the coating thickness. Within the scope/boundary of the completed research, a hold time of two hours is sufficient to minimize any hydrogen off-gassing effects. Within the parameters of the in-field welds and simulated welds, no major detrimental effects were found from hydrogen off-gassing and weld geometries. However, the higher cap-height did make coatings more susceptible to damage when handling. This confirms previous GTI research which indicated that coatings often accrue damage during handling. GTI and EWI, taking into consideration the survey and testing results produced a recommendation to be distributed to various stakeholders in the pipeline industry. The summary document to be disturbed is located in the Recommendation section of this report.

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Toutin, Th. Multisource Data Fusion with an Integrated and Unified Geometric Modelling. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1995. http://dx.doi.org/10.4095/218015.

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Cheng, P., Th Toutin, Y. Zhang, and M. Wood. QuickBird...Geometric Correction, Path and Block Processing and Data Fusion. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2003. http://dx.doi.org/10.4095/220038.

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Willsky, Alan S. Multiresolution, Geometric, and Learning Methods in Statistical Image Processing, Object Recognition, and Sensor Fusion. Defense Technical Information Center, 2004. http://dx.doi.org/10.21236/ada425745.

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