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Letteratura scientifica selezionata sul tema "3DAP"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 4 maggio 2024

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Articoli di riviste sul tema "3DAP"

Vurpillot, F., A. Cerezo, D. Blavette e D. J. Larson. "Modeling Image Distortions in 3DAP". Microscopy and Microanalysis 10, n. 3 (giugno 2004): 384–90. http://dx.doi.org/10.1017/s1431927604040486.

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A numerical model has been developed to simulate images obtained from the three-dimensional atom probe. This model was used to simulate the artefacts commonly observed in two-phase materials. This model takes into account the dynamic evolution of the atomic-scale shape of the specimen during field evaporation. This article reviews the model and its applications to some specific cases. Local magnification effects were studied as a function of the size, the shape, and the orientation of precipitated phases embedded in the matrix. Small precipitates produce large aberrations in good agreement with experiments. The magnification from such precipitates, as measured from the simulation, is only found to match the theoretical value for mesoscopic scale precipitates (size similar to the specimen size). Orientation effects are also observed in excellent agreement with experiments. The measured thickness of a grain-boundary-segregated film in the simulation is found to decrease with the angle between the normal to the grain boundary and the tip axis. Depth scaling artefacts caused by variation in the evaporation field of atoms in multilayer structures were successfully simulated and again showed good agreement with effects observed experimentally.

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Cerezo, Alfred, Peter H. Clifton, Sergio Lozano-Perez, Peter Panayi, Gang Sha e George D. W. Smith. "Overview: Recent Progress in Three-Dimensional Atom Probe Instruments and Applications". Microscopy and Microanalysis 13, n. 6 (14 novembre 2007): 408–17. http://dx.doi.org/10.1017/s143192760707095x.

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Over the last few years there have been significant developments in the field of three-dimensional atom probe (3DAP) analysis. This article reviews some of the technical compromises that have led to different instrument designs and the recent improvements in performance. An instrument has now been developed, based around a novel reflectron configuration combining both energy compensation and focusing elements, that yields a large field of view and very high mass resolution. The use of laser pulsing in the 3DAP, together with developments in specimen preparation methods using a focused ion-beam instrument, have led to a significant widening in the range of materials science problems that can be addressed with the 3DAP. Recent studies of semiconductor materials and devices are described.

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Schober, M., E. Eidenberger, P. Staron e H. Leitner. "Critical Consideration of Precipitate Analysis of Fe–1 at.% Cu Using Atom Probe and Small-Angle Neutron Scattering". Microscopy and Microanalysis 17, n. 1 (19 novembre 2010): 26–33. http://dx.doi.org/10.1017/s1431927610093955.

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AbstractAn Fe–1 at.% Cu model alloy was examined by atom probe (3DAP) and small-angle neutron scattering (SANS) to verify the accordance of the gained results. The Fe-Cu alloy was heat-treated for various times at 500°C, forming Cu-rich precipitates within the Fe matrix. The chemical compositions of the precipitates and matrix found by 3DAP were used to calculate the magnetic scattering contrast. Additionally, a magnetic moment of the precipitates that contain a significant amount of Fe was taken into account for the calculation of magnetic scattering contrast. This in turn is used for the evaluation of the magnetic scattering curves gained by SANS. Both the 3DAP data as well as the scattering curves were analyzed with regard to radius, number density, and volume fraction of the precipitates as a function of aging time. The results yielded by both techniques are in good agreement and correspond to the development of the hardness of the alloy. Minor differences can be related to the cluster search algorithm used for the analysis of the 3DAP data as well as Fe overestimation based on different field phases.

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Komiya, Yoshiki, Shoichi Hirosawa e Tatsuo Sato. "3DAP Analysis and Computer Simulation of Nanocluster Formation in the Initial Aging Stage of Al-Zn Alloys". Materials Science Forum 519-521 (luglio 2006): 437–42. http://dx.doi.org/10.4028/www.scientific.net/msf.519-521.437.

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The formation of nanoclusters in the early aging stage is not fully clarified due to their extremely small sizes. To clarify the atomic-scale clustering of solute atoms, a three-dimensional atom probe (3DAP) analysis and a Monte Carlo computer simulation have been conducted together for Al-Zn alloys. The nanoclusters in the alloy aged at room temperature were successfully detected in the obtained 3DAP maps. From these maps the growth behavior of nanoclusters during aging was experimentally examined. In the Monte Carlo simulation, on the other hand, many-body nearest neighbor interactions between atoms and between atoms and a vacancy were taken into account. The Zn concentration of the clusters calculated in the 4-body interaction model best agreed with that obtained experimentally, suggesting the importance of many-body interactions. Therefore, it was confirmed that the combined analysis of 3DAP and the well-constructed Monte Carlo simulation is useful to make clear the nanocluster formation in alloys.

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Warren, P. J., A. Cerezo e G. D. W. Smith. "Observation of atomic planes in 3DAP analysis". Ultramicroscopy 73, n. 1-4 (giugno 1998): 261–66. http://dx.doi.org/10.1016/s0304-3991(97)00165-4.

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Warren, PJ, A. Cerezo e G. D. W. Smith. "Towards 3D lattice reconstruction with the Position Sensitive Atom Probe". Microscopy and Microanalysis 4, S2 (luglio 1998): 86–87. http://dx.doi.org/10.1017/s1431927600020559.

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3-dimensional atom probe (3DAP) analysis enables 3D reconstruction of the chemical variations inside materials with near atomic resolution. This technique has enabled important insights into the phase chemistry and microstructure of a range of complex engineering materials. Although individual planes can be resolved when analysing in a direction close to a low-index pole, the spatial resolution of this technique has not been sufficient for reconstruction of all the original lattice positions. The spatial resolution is thought to be fundamentally limited by small lateral displacements of the atom on the surface of the specimen during the field evaporation process due primarily to interactions with the neighbouring surface atoms. It has therefore been considered that it will be impossible to correctly reconstruct the crystal lattice from 3DAP data. Recently, we have found that a 3DAP reconstruction of a region near a grain boundary in pure tungsten (an element renown for its good imaging and evaporation behaviour) revealed several different sets of crystallographic planes visible at angles up to 45° from the direction of analysis.

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Luo, Yi, e Xiao Chun Wu. "Investigation of Precipitation in a Aging Hardened Plastic Mould Steel". Advanced Materials Research 528 (giugno 2012): 152–55. http://dx.doi.org/10.4028/www.scientific.net/amr.528.152.

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The aging hardened plastic mould steel 10Ni3MnCuAl after aging at 510 °C is investigated by scanning electron microscope (SEM), transmission electronic microscope (TEM) and three dimensional atom probe (3DAP). The results show that its microstructure is granular bainite after soluted. Its aging hardening is mainly due to the precipitation of a high density, nanoscale and fully coherent NiAl precipitation with the B2 structure for 4 h. Clusters associated precipitates from 3DAP results show that its aging hardening derives from multicomponent precipitate containing Fe, Ni, Al, Mn and Cu, and concentration of Fe decreases with the aging time, while that of Ni, Al, Mn and Cu are opposite, and the ratio between Ni and Al are roughly 1.

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Ohkubo, T., D. Nagahama, Isabelle Martin e K. Hono. "Laser Assisted 3DAP Analysis of Bulk Metallic Glass". Materia Japan 46, n. 12 (2007): 810. http://dx.doi.org/10.2320/materia.46.810.

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Ohkubo, T., H. Sepehri-Amin, T. T. Sasaki e K. Hono. "Multi-scale characterization by FIB-SEM/TEM/3DAP". Microscopy 63, suppl 1 (30 ottobre 2014): i6—i7. http://dx.doi.org/10.1093/jmicro/dfu046.

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Sasaki, T. T., T. Ohkubo e K. Hono. "3DAP/TEM Study of Precipitation Hardened Magnesium Alloys". Microscopy and Microanalysis 23, S1 (luglio 2017): 686–87. http://dx.doi.org/10.1017/s1431927617004093.

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Tesi sul tema "3DAP"

Marlaud, Thorsten. "Microstructures de précipitation et mécanismes de corrosion feuilletante dans les alliages d'aluminium de la série 7000 à très hautes caractéristiques mécaniques". Phd thesis, Grenoble INPG, 2008. http://www.theses.fr/2008INPG0031.

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Les alliages d’aluminium de la série 7000 à hautes caractéristiques mécaniques, constitués principalement des éléments d’addition Zn, Mg, et Cu, sont notamment utilisés dans l’industrie aéronautique civile. Néanmoins, les traitements thermiques et/ou thermomécaniques appliqués pour maximiser les propriétés mécaniques de ces alliages, peuvent les sensibiliser à divers modes de corrosion structurale dont la corrosion feuilletante, dont les mécanismes sont encore mal compris. En outre, les nouvelles générations d’alliages, développées en vue d’augmenter les propriétés mécaniques, contiennent toujours plus d’éléments d’addition, ce qui est susceptible de modifier leur sensibilité à ce phénomène. Ce travail s’attache à faire progresser la compréhension des mécanismes de corrosion feuilletante des alliages 7000, en cherchant à identifier le rôle des principaux éléments d’alliage. Pour cela nous avons caractérisé finement les états de précipitation d’un grand nombre de microstructures, comme la composition des précipités durcissants nanométriques et de la matrice, par ASAXS et 3DAP. En parallèle, nous avons développé de nouvelles techniques électrochimiques permettant de quantifier la sensibilité de ces mêmes microstructures à la corrosion feuilletante. Les résultats de l’étude mettent en évidence l’existence de deux mécanismes de corrosion : endommagement par dissolution intergranulaire et par rupture intergranulaire, dont la prédominance dépend de la composition de l’alliage et du traitement thermique. Nous proposons une explication au comportement en corrosion des différentes microstructures, faisant intervenir la composition chimique des différentes entités microstructurales
High strength 7XXX series aluminium alloys, composed of the major alloying elements Zn, Mg, and Cu, are used especially for aircraft applications. However, the ageing process, maximizing the mechanical properties, returns alloys sensitive to structural corrosion, and particularly to exfoliation corrosion. New developments in high strength alloys, for strength optimization, lead an overall increase in solute saturation, which could modify their corrosion susceptibility. The objective of the study is to progress in the understanding of the exfoliation corrosion mechanisms of high-strength 7000 series aluminium alloys, by attempting especially to identify the role of the main alloying elements. By leaning on a quantitative precipitation characterisation of a large number of microstructures, we notably measured the composition of nanometric hardening precipitates and of the matrix, by ASAXS and 3DAP. In parallel, we developed new electrochemical techniques providing quantitative results on the exfoliation corrosion sensitivity of microstructuresTheses results show the existence of two operating corrosion mechanisms: damages by " intergranular dissolution " and by intergranular ruptures. The ascendancy of which depends on the composition of the alloy. We propose an explanation of the corrosion susceptibility of the various microstructures, based on the chemical composition of the microstructural entities and of the alloy

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Les alliages d'aluminium de la série 7000 à hautes caractéristiques mécaniques, constitués principalement des éléments d'addition Zn, Mg, et Cu, sont notamment utilisés dans l'industrie aéronautique civile. Néanmoins, les traitements thermiques et/ou thermomécaniques appliqués pour maximiser les propriétés mécaniques de ces alliages, peuvent les sensibiliser à divers modes de corrosion structurale dont la corrosion feuilletante, dont les mécanismes sont encore mal compris. En outre, les nouvelles générations d'alliages, développées en vue d'augmenter les propriétés mécaniques, contiennent toujours plus d'éléments d'addition, ce qui est susceptible de modifier leur sensibilité à ce phénomène.
Ce travail s'attache à faire progresser la compréhension des mécanismes de corrosion feuilletante des alliages 7000, en cherchant à identifier le rôle des principaux éléments d'alliage. Pour cela nous avons caractérisé finement les états de précipitation d'un grand nombre de microstructures, comme la composition des précipités durcissants nanométriques et de la matrice, par ASAXS et 3DAP. En parallèle, nous avons développé de nouvelles techniques électrochimiques permettant de quantifier la sensibilité de ces mêmes microstructures à la corrosion feuilletante.
Les résultats de l'étude mettent en évidence l'existence de deux mécanismes de corrosion : endommagement par dissolution intergranulaire et par rupture intergranulaire, dont la prédominance dépend de la composition de l'alliage et du traitement thermique. Nous proposons une explication au comportement en corrosion des différentes microstructures, faisant intervenir la composition chimique des différentes entités microstructurales.

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Buha, Joka School of Materials Science &amp engineering UNSW. "Interrupted ageing of Al-Mg-Si-Cu alloys". Awarded by:University of New South Wales. School of Materials Science and engineering, 2005. http://handle.unsw.edu.au/1959.4/20794.

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This thesis systematically investigates the effects of a recently developed modified ageing procedure of aluminium alloys, termed the T6I6 temper, on the microstructural development and mechanical properties of the Al ??? Mg ??? Si - Cu alloy 6061. For the T6I6 temper, a conventional single stage T6 temper is interrupted by an ageing period at a reduced temperature (65??C) to facilitate secondary precipitation, before resuming the final ageing at the temperature of the initial T6 treatment. The T6I6 temper was found to cause simultaneous increases in tensile properties, hardness, and toughness as compared with 6061 T6. Al ??? Mg ??? Si ??? Cu alloys are medium strength alloys widely used in the automotive industry and their further improvement is underpinned by stringent demands for weight reduction placed on the transportation industry in recent years. The potential for further improvement of the mechanical properties was found in the control of secondary precipitation that may take place even in some fully aged alloys when exposed to reduced temperatures. The overall improvement in the mechanical properties of 6061 T6I6 was attributed to the formation of finer and more densely dispersed precipitates in the final microstructure. The refinement of precipitates was facilitated by control of the precipitation processes and gradual evolution of the microstructure throughout each stage of the T6I6 treatment. The results indicated that the concentration and the chemical environment of the vacancies controlled the precipitation processes in this alloy. Findings also show that the proportion of the different precipitate phases present in the final microstructure, as well as the amount of the solute in these precipitates, can be controlled and modified utilizing secondary precipitation. A number of analytical techniques were used in this study. The evolution of the microstructure was studied using Transmission Electron Microscopy (TEM), High Resolution TEM (HRTEM) and Three Dimensional Atom Probe (3DAP). Vacancy-solute interactions were studied using Positron Annihilation Lifetime Spectroscopy (PALS) and 3DAP. The distribution of the solute was studied using 3DAP and Nuclear Magnetic Resonance (NMR). Differential Scanning Calorimetry (DSC) was used to identify precipitation reactions and to determine the stability of vacancy-associated aggregates.

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Kimata, Hideaki. "MPEG 3DAV International Standardization Activities". INTELLIGENT MEDIA INTEGRATION NAGOYA UNIVERSITY / COE, 2005. http://hdl.handle.net/2237/10359.

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Gatto, Matteo. "Investigation of 3DP technology for fabrication of surgical simulation phantoms". Thesis, Loughborough University, 2011. https://dspace.lboro.ac.uk/2134/8362.

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The demand for affordable and realistic phantoms for training, in particular for functional endoscopic sinus surgery (FESS), has continuously increased in recent years. Conventional training methods, such as current physical models, virtual simulators and cadavers may have restrictions, including fidelity, accessibility, cost and ethics. In this investigation, the potential of three-dimensional printing for the manufacture of biologically representative simulation materials for surgery training phantoms has been investigated. A characterisation of sinus anatomical elements was performed through CT and micro-CT scanning of a cadaveric sinus portion. In particular, the relevant constituent tissues of each sinus region have been determined. Secondly, feedback force values experienced during surgical cutting have been quantified with an actual surgical instrument, specifically modified for this purpose. Force values from multiple post-mortem subjects and different areas of the paranasal sinuses have been gathered and used as a benchmark for the optimisation of 3D-printing materials. The research has explored the wide range of properties achievable in 3DP through post-processing methods and variation of printing parameters. For this latter element, a machine-vision system has been developed to monitor the 3DP in real time. The combination of different infiltrants allowed the reproduction of force values comparable to those registered from cadaveric human tissue. The internal characteristics of 3D printed samples were shown to influence their fracture behaviour under resection. Realistic appearance under endoscopic conditions has also been confirmed. The utilisation of some of the research has also been demonstrated in another medical (non-surgical) training application. This investigation highlights a number of capabilities, and also limitations, of 3DP for the manufacturing of representative materials for application in surgical training phantoms.

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Wang, Hong-Ren 1973. "Gradient-Index (GRIN) lenses by Slurry-based Three-Dimensional Printing (S-3DP)". Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/30248.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2005.
In title on t.p., superscript "TM" follows "S-3DP".
Includes bibliographical references.
GRIN lenses with vertical index variation and radial index variation have been successfully fabricated using S-3DPTM. Two silica-based material systems, A1203-SiO₂ and BaO-SiO₂, have been studied and used for the fabrication of GRIN lenses. Aluminum nitrate was dissolved in water to provide the dopant salt solution for S-3DPTM. The pre-sintering treatment at 1000 ⁰Cfor 24 hours in. vacuum (-5x10-6 torr) was used to remove the hydroxyl groups that cause bubbles during sintering. The sintering condition for the A1203-SiO₂ material system was found to be 1650 ⁰C for 30 minutes in vacuum. Two alumina-doped silica GRIN lenses with vertical index variation, Design 1.63 [percent] max and Design 2.5 [percent] max, were fabricated with effective focal lengths of 10.00 cm and 6.10 cm, respectively. An alumina-doped silica GRIN lens with radial parabolic index variation also was fabricated with effective focal lengths of 63.75 cm in the x direction and 52.50 cm in the y direction. The BaO-SiO₂ material system, which has a 2.4 stronger index changing ability than the A1203-SiO₂ material system, also was developed. Barium acetate was used as the dopant source. The pre-sintering treatment was found to be 900 ⁰C for 18 hours in air to convert barium acetate to barium oxide. The sintering condition was found to be 1725 ⁰C for 10 minutes in vacuum. A barium oxide-doped GRIN lens with radial parabolic index variation was fabricated. Its effective focal length was measured to be 14.63 cm in the x direction and 11.14 cm in the y direction. The barium oxide concentration profiles were measured. The theoretical focal lengths were calculated and compared with the effective focal lengths.
by Hong-Ren Wang.
Ph.D.

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Oliveira, Mark A. (Mark Anthony) 1977. "Slurry based Three Dimensional Printing (S-3DP tm) of tungsten carbide cobalt". Thesis, Massachusetts Institute of Technology, 2002. http://hdl.handle.net/1721.1/109638.

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Benítez, César Manuel Vargas. "Um algoritmo genético paralelo para o problema de dobramento de proteínas utilizando o modelo 3DHP com cadeia lateral". Universidade Tecnológica Federal do Paraná, 2010. http://repositorio.utfpr.edu.br/jspui/handle/1/1049.

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CNPq
Este trabalho apresenta um algoritmo genético paralelo (AGP) para o problema de dobramento de proteínas, utilizando o modelo 3DHP-SC. Este modelo tem sido pouco abordado devido ao elevado grau de complexidade envolvido. Foi proposta uma função de fitness baseada na energia livre e na compacidade do dobramento. Operadores genéticos especiais foram desenvolvidos, além de estratégias para auxiliar o algoritmo no processo de busca de conformações de proteínas. Vários experimentos foram realizados para ajustar todos os parâmetros do sistema, incluindo os parâmetros básicos do AG (probabilidades de mutação e crossover, e o tamanho de torneio) e os parâmetros dos operadores especiais e das estratégias. O efeito da matriz de energias para o modelo no desempenho do algoritmo também foi estudado. Uma comparação com outra abordagem de computação evolucionária também foi realizada, a fim de verificar o desempenho do método proposto. Devido a não existir, até então, benchmarks para teste deste modelo, foi proposto um conjunto de 25 sequências baseado em outro modelo mais simplificado. Os resultados obtidos mostraram que o AGP alcançou um bom nível de eficiência e obteve dobramentos biologicamente coerentes, sugerindo a adequabilidade da metodologia proposta.
This work presents a parallel genetic algorithm (PGA) for the protein folding problem, using the 3DHP-SC model. This model has been sparsely studied in the literature due to its complexity. A new fitness function was proposed, based on the free-energy and compacity of the folding. Special genetic operators were developed, besides strategies to aid the algorithm in the search of protein conformations. Many experiments were done to adjust all the parameters of the system, including the basic parameters of the GA (mutation and crossover probability, and tournament size) and parameters of the special genetic operators and strategies. The effect of the energy matrix of the model in the performance of the algorithm was also studied. Moreover, a comparison with other evolutionary computation approach was done, to verify the performance of the proposed method. Since there is no benchmark available to date, a set of 25 sequences was used, based on a simpler model. Results show that the PGA achieved a good level of efficiency and obtained biologically coherent results, suggesting its adequacy for the problem.

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Mehta-Chopra, Nishi. "The representation and consumption of 'Asian culture'". Thesis, Oxford Brookes University, 2005. https://radar.brookes.ac.uk/radar/items/679e936c-3da8-4fdb-90a5-6e6abf625db1/1/.

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This thesis focuses on the representation and consumption of 'Asian culture' within a context of Western popular culture and specifically, 'British mainstream' and 'British Asian' magazine visual discourses. Through a critical engagement with Edward Said's Orientalism (1978) which charted Western inferiorizing cultural representations of the East as located in historical and material contexts, I aim to explore issues of 'race' and Otherness amidst a background of historical and commodification processes. This has been attempted using multiple methodologies that in addition to engaging with secondary material, has involved a reflexive use of semiotics and discourse analysis to analyse magazine images and written text respectively. Further, I have attempted to go beyond the textual focus of both Orientalism (1978) and many media studies by also gathering contextual reader responses to magazine representations. These have taken the form of the subjective interpretations of 20 British youths (men and women of Asian and white English origin) that have been analysed in conjunction with biographical narratives that I also conducted with each of them. Through the use of this rich and varied empirical data coupled with a thorough review of secondary source material, I aim to add to and question work that has been conducted in the area of 'race' and culture that appears to have moved from a concentration on the 'essential black subject' to an emphasis on ethnic unities within an uncritical celebration of 'diaspora' and 'hybridity'. I also aim to make problematic work that has been conducted in the area of orientalism through drawing attention to the limitations associated with the concept of 'self-orientalism' and practices of 'self-representation' by minorities. Overall, through conducting work on Asian representations within the popular magazine media coupled with its interrelation with varied audiences, I hope to make some inroads into these under-researched areas.

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Bang, Won B. "Improving the strength of 3DP parts and development of controlled strength cellular structure investment casting shell". Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/38200.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1996.
Includes bibliographical references (p. 79).
Three Dimensional Printing (3DP) is a rapid prototyping process that creates a three dimensional part directly from computer models by printing a sequence of two dimensional layers. In this research, the strength of 3DP parts were improved by using different "print styles" (the way binder is deposited on the powder bed in creating a 3DP part) for use in investment casting process. The print styles that were created optimized line to line interaction between the printed lines, binder overlap, and the amount of unprinted powder surrounding the printed features. The strength of the parts are measured in three different axes (X-fast, Y-slow, Z). The strength improved by factors of 2, 8, and 7 for the three different axes. A controlled strength cellular structure investment casting shell that enables the creation of a metal part without any stress related defects has been created. The ceramic shell has an open cell frame structure with thin inner shell where the metal casting is poured. The flexibility of the 3DP technology applied to controlled strength cellular structure investment casting shell will incorporate all the advantages of 3DP to investment casting (Sach 1992, ASME) as well as reduction in material consumption, controlled heat transfer, permeability, and of course controlled strength to eliminate stress related defects. The cellular structure ceramic mold is designed to withstand the pouring pressures of the molten metal and survive the handling during processing yet fail when the stresses from the contracting metal becomes excessive. The 3DP molds are usually 60% porous and cellular structure investment casting shells consist of only 35% of the 3DP material per volume. A controlled strength cellular structure investment casting shell is designed to fail when excessive stress is applied to the shell structure. The stress on the casting shell is caused by the shrinkage of the metal part. The controlled strength investment casting shell has an open cellular structure frame with a thin inner shell where the metal casting will form.
by Won B. Bang.
S.M.

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Libri sul tema "3DAP"

(Society), SPIE, IS & T--the Society for Imaging Science and Technology e Electronic Imaging Science and Technology Symposium (2010 ; San Jose, Calif.), a cura di. Three-dimensional image processing (3DIP) and applications: 18-19 January 2010, San Jose, California, United States. Bellingham, Wash: Spie, 2010.

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Baskurt, Atilla, e Robert Sitnik. Three-dimensional image processing (3DIP) and applications II: 24-26 January 2012, Burlingame, California, United States. A cura di IS & T--the Society for Imaging Science and Technology, SPIE (Society) e Electronic Imaging Science and Technology Symposium (2012 : Burlingame, Calif.). Bellingham, Wash: SPIE, 2012.

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Z, Smith, e Space Environment Center (U.S.), a cura di. Comparison of plasma parameter values obtained from the WIND SWE and 3DP instruments. Boulder, Colo: U.S. Dept. of Commerce, National Oceanic and Atmospheric Administration, Environmental Research Laboratories, Space Environment Center, 1998.

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Shi ji kong long xiang qian chong!: 3D kuo zeng shi jing hu dong APP! : he chao meng de kong long men yi qi cheng ba di qiu = 3DAR dinosaur world. Xinbei Shi: You fu wen hua shi ye gu fen you xian gong si, 2015.

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Hai yang sheng wu xiang qian chong!: 3D kuo zeng shi jing hu dong APP! : he chao meng de hai yang sheng wu men yi qi tan suo hai di = 3DAR marine life. Xinbei Shi: You fu wen hua shi ye gu fen you xian gong si, 2015.

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Maggie, Rondon. 3day Diet Cookbook: Recipes to Help You Lose Pounds, Inches, and Kidney-Friendly Meal Plan for Living a Healthy Life. Independently Published, 2022.

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Capitoli di libri sul tema "3DAP"

Serizawa, Ai, Shoichi Hirosawa e Tatsuo Sato. "3DAP Characterization and Thermal Stability of Nano-Scale Clusters in Al-Mg-Si Alloys". In Materials Science Forum, 245–50. Stafa: Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-408-1.245.

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Komiya, Yoshiki, Shoichi Hirosawa e Tatsuo Sato. "3DAP Analysis and Computer Simulation of Nanocluster Formation in the Initial Aging Stage of Al-Zn Alloys". In Materials Science Forum, 437–42. Stafa: Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-408-1.437.

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Ribeiro, João, João Miguel Silva, António Morais, Bruno Figueiredo e Paulo J. S. Cruz. "3DCP for Complex Sites: Robotic Fabrication of Custom-Fit Slabs in Irregular Pontoons". In Computational Design and Robotic Fabrication, 492–502. Singapore: Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-99-8405-3_41.

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AbstractThis paper presents a case study on the use of 3DCP to qualify rocky pontoons with spaces for recreational use—namely sitting areas, circulation trails and fishing activities—and biodiversity protection—providing habitat and refuge for native marine species—with a focus on the challenges and opportunities associated with 3DCP prefabrication for such a complex topographical context. We first discuss the benefits and disadvantages of 3DCP over traditional methods for retrofitting strategies with the support of state-of-the-art literature review. We then present a methodology for an experimental case study, organized in three stages: (1) a photogrammetric survey and digital reconstruction of the site´s rocky landscape, (2) the creation of a tool to generate and optimize custom-fit slabs based on their location on site, intended use and role in the protection of the natural ecosystem, and (3) the robotic fabrication of these slabs through 3DCP. Finally, we present our key findings, revealing that 3DCP offers a viable and more efficient alternative for appropriating and revitalizing sites with a disorderly and highly complex topography.

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Wan, Qian, Li Wang e Guowei Ma. "Adaptable Tool-Path Planning Method for 3D Concrete Printing Based on the Mapping Method". In Proceedings of the 2020 DigitalFUTURES, 255–64. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-4400-6_24.

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Abstract3D concrete printing (3DCP) has been successfully and widely applied in the fields of civil structure, infrastructure, architectural decoration etc.,due to its unique advantages of automation and flexibility, and has shown great potential for development. One of the key steps in the execution of 3DCP is the tool-path planning process. However, 3DCP typically utilize the flowable composite materials which changes with time, and it is easy to induce interface joints or filling defects due to uneven path distribution when constructing the irregular-shaped construction. To solve the problem of printing path planning in 3DCP, this paper proposes tool-path planning based on mapping method, which integrates the rheology and necessary continuity of concrete materials into the printing process parameters, improves the mutual adaptability of printing process and material characteristics, improves the continuity of printing, the compactness of filling, and then ensures the stability and durability of printing structure.

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Kerr, Tyler. "FDM 3DP Limitations". In Synthesis Lectures on Digital Circuits & Systems, 25–33. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-19350-7_3.

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Bai, G., G. Chen, R. Li, L. Wang e G. Ma. "3D printed Ultra-High Performance Concrete: Preparation, Application, and Challenges". In Lecture Notes in Civil Engineering, 53–65. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-3330-3_8.

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Abstract3D printed ultra-high performance concrete (3DP-UHPC) plays an important role in the realization of ultra-high compressive and tensile strengths. Considering the particular characteristics of UHPC, the conversion of UHPC to 3DP-UHPC is a complex phenomenon and has been the subject of numerous studies. It is very important to be able to design a thixotropic structure in the early hydration stage for bridging the gap between the slow setting of UHPC and the rapid setting of the 3D printing procedure. In the design and application of 3DP-UHPC, requirements such as the ratio of coagulant and flocculant, fiber alignment, reinforced 3D printed no-rebar reinforced concrete, safety, cost etc. need to be taken into account. We present a comprehensive review of 3DP-UHPC in concrete construction from preparation to application, including design method, raw materials, mechanical, reinforced methods, and applications. Finally, recommendations are provided to promote the application of 3DP-UHPC in engineering practice.

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Ryan, Michael. "Implementation Scenarios for 3DP". In Managing 3D Printing, 7–24. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-23323-5_2.

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Eyers, Daniel. "Flexibility Strategies for 3DP". In Managing 3D Printing, 77–96. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-23323-5_6.

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Minetola, Paolo, Paolo C. Priarone e Giuseppe Ingarao. "Sustainability for 3DP Operations". In Managing 3D Printing, 97–126. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-23323-5_7.

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Griffin, James. "Biotech 3DP digital watermarking". In Intellectual Property Rights and Emerging Technology, 28–49. New York, NY: Routledge, 2018.: Routledge, 2018. http://dx.doi.org/10.4324/9781351239905-3.

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Atti di convegni sul tema "3DAP"

Cerezo, A., P. H. Clifton, A. Gomberg e G. D. W. Smith. "Temperature Measurements and Mass Resolution in a Laser-Pulsed 3DAP". In 2006 19th International Vacuum Nanoelectronics Conference. IEEE, 2006. http://dx.doi.org/10.1109/ivnc.2006.335350.

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Zhu, C., X. Xiong, A. Cerezo e G. D. W. Smith. "3DAP Study of Alloy Element Effects on the Tempering of Steel". In 2006 19th International Vacuum Nanoelectronics Conference. IEEE, 2006. http://dx.doi.org/10.1109/ivnc.2006.335385.

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Takahashi, Y. K., K. Hono, Y. Miyake, D. Kaneko e H. Kanai. "3DAP analysis of FeCo electrodeposited soft magnetic films with high B/sub s/". In INTERMAG Asia 2005: Digest of the IEEE International Magnetics Conference. IEEE, 2005. http://dx.doi.org/10.1109/intmag.2005.1463711.

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Bai, Bing, Hanxiao Wang, Changyi Zhang, Zhenfeng Tong e Wen Yang. "Effect of Element Segregation on Thermal Aging Behavior of 17-4PH Martensitic Stainless Steel for Nuclear Power Plant". In 2017 25th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/icone25-66977.

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The valve stem used in the main steam system of nuclear power plant is usually 17-4PH martensitic stainless steel. When it served in 300 C° for a long time, the thermal aging embrittlement of valve stem will be significant, with the performance of the ductile brittle transition temperature (DBTT) and the hardness increased, the upper stage energy (USE) decreased. It will seriously affect the safety and economic operation of nuclear power plant (NPP). It is important to study the thermal aging effect of the 17-4PH steel for safe operation of nuclear power plant. In this work, Three-Dimensional Atom Probe (3DAP), Energy Dispersive X-Ray Spectroscopy (EDX), Scanning Electron Microscope (SEM) and Optical Microscope (OM) are used to analyze the element distribution in 17-4PH steel. The results show that lath martensite will grow significantly under high temperature for a long time. More δ-ferrite will be found between lath martensite, and some carbide aggregates at its interface. In addition, the number density of Cu clusters in the17-4PH steel is increased. It is found that Ni and Mn have obvious segregation with the Cu cluster.

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Paluszny, Marco, e Jose Fernando Ramirez. "Zero - distortion display of curved slices". In Three-Dimensional Image Processing (3DIP) and Applications. SPIE, 2010. http://dx.doi.org/10.1117/12.838683.

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Leschok, Matthias, e Benjamin Dillenburger. "Dissolvable 3DP Formwork". In ACADIA 2019: Ubiquity and Autonomy. ACADIA, 2019. http://dx.doi.org/10.52842/conf.acadia.2019.188.

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Sipman, Wim H. M. "3DAS: a breakthrough in fraud prevention". In Electronic Imaging: Science & Technology, a cura di Rudolf L. van Renesse. SPIE, 1996. http://dx.doi.org/10.1117/12.235451.

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Paquet, Eric, e Herna L. Viktor. "Fractal geometryand multimedia retrieval: a theoretical framework". In Three-Dimensional Image Processing (3DIP) and Applications II. SPIE, 2012. http://dx.doi.org/10.1117/12.905086.

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Läufer, Tim, e Matthias Ludwig. ""Building" knowledge by creating manipulatives with the 3D printer: A course for mathematics student teachers". In Ninth International Conference on Higher Education Advances. Valencia: Universitat Politècnica de València, 2023. http://dx.doi.org/10.4995/head23.2023.16225.

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3D modelling and printing (3DMP) is a suitable context for education. With it, own manipulatives for mathematics education can be created, which was not possible easily before. We develop a seminar at Goethe University, in which use 3DMP to teach mathematics student teachers about mathematics, pedagogy, and technology. In this paper, we present the general 3DMP process, and how we integrate it in the seminar. The structure and contents of the seminar, as well as results from the students are laid out. The hardware and software used are shown and explained, as well as our approach to 3D modelling with the help of programming. The individual iterations of the seminar and the conclusions show that students mainly benefit from being able to realize their ideas very early and having the freedom to choose their own topic.

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Fang, Guangchi, Qingyong Hu, Hanyun Wang, Yiling Xu e Yulan Guo. "3DAC: Learning Attribute Compression for Point Clouds". In 2022 IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR). IEEE, 2022. http://dx.doi.org/10.1109/cvpr52688.2022.01440.

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Rapporti di organizzazioni sul tema "3DAP"

Kahler, S. W., N. U. Crooker e D. E. Larson. Parameterizing the Wind 3DP Heat Flux Electron Data. Fort Belvoir, VA: Defense Technical Information Center, gennaio 2004. http://dx.doi.org/10.21236/ada422682.

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Reeves, Robert, Joseph Tringe, Darby Makel e Susana Carranza. Development of Powder Bed Printing (3DP) For Rapid and Flexible Fabrication of Energetic Material Payloads and Munitions Final Report CRADA No. TC02250.0. Office of Scientific and Technical Information (OSTI), novembre 2017. http://dx.doi.org/10.2172/1419652.

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Reeves, R., J. Tringe, D. Makel e S. Carranza. Development of Powder Bed Printing (3DP) For Rapid and Flexible Fabrication of Energetic Material Payloads and Munitions Final Report CRADA No. TC02250.0. Office of Scientific and Technical Information (OSTI), marzo 2021. http://dx.doi.org/10.2172/1774216.

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