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Letteratura scientifica selezionata sul tema "DIMENSION SHEET"

Autore: Grafiati

Pubblicato: 11 settembre 2023

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Articoli di riviste sul tema "DIMENSION SHEET"

1

Burton, D. A., e R. W. Tucker. "Geometry and dynamics of vortex sheets in 3 dimension". Theoretical and Applied Mechanics, n. 28-29 (2002): 55–76. http://dx.doi.org/10.2298/tam0229055b.

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We consider the properties and dynamics of vortex sheets from a geometrical, coordinate-free, perspective. Distribution-valued forms (de Rham currents) are used to represent the fluid velocity and vorticity due to the vortex sheets. The smooth velocities on either side of the sheets are solved in terms of the sheet strengths using the language of double forms. The classical results regarding the continuity of the sheet normal component of the velocity and the conservation of vorticity are exposed in this setting. The formalism is then applied to the case of the self-induced velocity of an isolated vortex sheet. We develop a simplified expression for the sheet velocity in terms of representative curves. Its relevance to the classical Localized Induction Approximation (LIA) to vortex filament dynamics is discussed. .

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2

Safronov, Evgeniy, e Andrey Nosko. "Analysis of Linear Dimension Accuracy of Sheet Metal Bending". MATEC Web of Conferences 346 (2021): 01007. http://dx.doi.org/10.1051/matecconf/202134601007.

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Working on the design of the products obtained by the V-bending, the engineer uses the nominal thickness of the material. In this case, the problem is to evaluate the accuracy of the linear dimensions of the resulting products due to deviations in the thickness of the material and the manufacturing technology of the steel sheets. Article presents analysis of linear dimension accuracy for V-bending for the metal cold-rolled and hot-rolled sheets with thickness 1.0…8.0 mm and width from 1000…1500mm. Proposed method is based on the calculation of difference between nominal flat length and flat lengths corresponding maximum and minimum thickness of the metal sheet.

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3

Hwang, Y.-M., e D.-C. Chen. "Finite element simulations on void closure behaviour inside the sheet during sheet rolling processes". Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 216, n. 9 (1 settembre 2002): 1227–37. http://dx.doi.org/10.1243/095440502760291781.

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The purpose of this paper is to explore the deformation mechanism of voids and stress-strain distributions around internal voids inside the sheet during sheet rolling processes. The plastic deformation and flow pattern of sheets during sheet rolling were simulated by the finite element method. The influences of various rolling conditions, such as the thickness reduction, the dimension of the internal void, friction factor, cross-sectional area of the void, etc., on the dimension of the void at the exit are discussed. The critical thickness reductions, over which the void would close completely, were also investigated. Furthermore, experiments on sheet rolling with an internal void inside the sheet were conducted. Theoretical predictions of the dimension of voids after rolling were compared with experimental results and relatively good agreement between them was found. Clearly, these analytical results can provide useful knowledge for designing the pass-schedule of sheet rolling processes for eliminating internal voids.

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4

He, Song, Heyun Liu, Yuan Zhang, Haili Liu e Wang Chen. "Investigation of the Interface Effects and Frosting Mechanism of Nanoporous Alumina Sheets". Processes 11, n. 7 (6 luglio 2023): 2019. http://dx.doi.org/10.3390/pr11072019.

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Nanoporous alumina sheets can inhibit the growth of the frost layer in a low-temperature environment, which has been widely used in air-conditioning heat exchangers. In this study, nanoporous alumina sheets with pore diameters of 30 nm, 100 nm, 200 nm, 300 nm, and 400 nm were prepared by using the anodic oxidation method with the conventional polished aluminum sheet as the reference. A comprehensive and in-depth analysis of the frosting mechanism has been proposed based on the contact angle, specific surface area, and fractal dimension. It was found that compared with the polished aluminum sheet, the nanoporous alumina sheets had good anti-frost properties. Due to its special interface effects, the porous alumina sheet with a 100 nm pore diameter had strong anti-frost performance under low temperatures and high humidity. In an environment with low surface temperature and high relative humidity, it is recommended to use hydrophilic aluminum fins with large specific areas and small fractal dimensions for the heat exchange fins of air source heat pump air conditioning systems.

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5

Wang, Xiao Xiong, Jing Liu, Jing Tao Han e Qian Liu. "Numerical Simulation of Polyurethane Pad Punching Process". Advanced Materials Research 941-944 (giugno 2014): 1817–21. http://dx.doi.org/10.4028/www.scientific.net/amr.941-944.1817.

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A numerical simulation was conducted to investigate the effect of the punching clearance, the thickness of sheet, and the hardness of polyurethane pad on the process of punching by finite element program ABAQUS which based on shear failure criterion and arbitrary Lagrangian-Eulerian adaptive meshing method. And the collapse height dimension and width dimension tendency of the sheet under different control parameters was analyzed after punching process according to this simulation result. The results show that the collapse height dimension and width dimension decreased with the increase of the polyurethane hardness, it means the cross section quality perspicuously has been increased; the collapse height dimension and width dimension decreased with the increasing of the sheet thickness; while the influence of the punching gap is indistinctive.

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6

Napolitano, F., G. De Rosa, G. Caporale, A. Carlucci, F. Grasso e E. Monteleone. "Bridging consumer perception and on-farm assessment of animal welfare". Animal Welfare 16, n. 2 (maggio 2007): 249–53. http://dx.doi.org/10.1017/s0962728600031456.

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AbstractThe present study aims to assess the relationship between consumer perception and on-farm assessment of animal welfare performed using the Animal Needs Index 35L (ANI). Two tie-stall, 2 straw yard and 2 cubicle farms were scored by trained assessors using the ANI and filmed to produce six 3.5 min videos. Each of them contained 4 clips: barn overall view, feeding, milking and individual animals. Ten untrained observers were asked to elicit terms describing how they perceived the observed farming systems to affect animal welfare using Free Choice Profiling (FCP). Data from FCP were subjected to Generalised Procrustes Analysis (GPA). GPA showed a significant consensus among observers. Observers characterised the first dimension with terms ranging from constrictive to comfortable conditions and the second one in terms of cleanliness/dirtiness. Principal Component Analysis (PCA) was conducted using the scores of the farms on the first two dimensions of GPA and the data gathered through the ANI. The first dimension of GPA (Comfortable), ANI's sheet 1 (Locomotion), sheet 2 (Social interaction) and sheet 6 (Total score) showed high loadings on the first component of PCA, whereas the second dimension of GPA (Clean), sheet 3 (Flooring) and sheet 4 (Stockmanship) were correlated with the second component of PCA. We concluded that FCP may be used to elicit lay person perception of welfare-related characteristics of dairy cattle farming systems, thus providing a tool to study the relationships between consumer perception and on-farm assessment of animal welfare.

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7

BRAUNE, S. "GEOMETRICAL PROPERTIES OF CONFORMAL FIELD THEORIES COUPLED TO TWO-DIMENSIONAL QUANTUM GRAVITY". International Journal of Modern Physics A 11, n. 11 (30 aprile 1996): 1913–28. http://dx.doi.org/10.1142/s0217751x96000997.

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In this work we discuss an approach due to F. David to the geometry of world sheets of noncritical strings in quasiclassical approximation. The gravitational dressed conformal dimension is related to the scaling behavior of the two-point function with respect to a distance variable. We show how this approach can reproduce the standard gravitational dressing in the next order of perturbation theory. Furthermore, we try to find this scaling dimension by studying the functional integral. With the same technique we calculate the intrinsic Hausdorff dimension of a world sheet.

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8

BEZEMER, DIRK J. "THE ECONOMY AS A COMPLEX SYSTEM: THE BALANCE SHEET DIMENSION". Advances in Complex Systems 15, supp02 (settembre 2012): 1250047. http://dx.doi.org/10.1142/s0219525912500476.

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Given the economy's complex behavior and sudden transitions as evidenced in the 2007–2008 crisis, agent-based models are widely considered a promising alternative to current macroeconomic research dominated by DSGE models. Their failure is commonly interpreted as a failure to incorporate heterogeneous interacting agents. This paper explains that complex behavior and sudden transitions also arise from the economy's financial structure as reflected in its balance sheets, not just from heterogeneous interacting agents. It introduces "flow-of-funds" or "accounting" models, which were pre eminent in successful anticipations of the recent crisis. In illustration, a simple balance sheet model of the economy is developed to demonstrate that non-linear behavior and sudden transition may arise from the economy's balance sheet structure, even without any micro-foundations. The paper concludes by discussing one recent example of combining flow-of-funds and agent-based models. This appears a promising avenue for future research.

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9

Yang, Xiaoyong, e Tan Jin. "Fractal calculation method of friction parameters: Surface morphology and load of galvanized sheet". Open Physics 19, n. 1 (1 gennaio 2021): 375–82. http://dx.doi.org/10.1515/phys-2021-0042.

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Abstract In the forming process of galvanized sheet, the friction between the die and the blank often causes the zinc coating of galvanized sheet to peel off, scratch, and crack. The aim of this study is to evaluate and calculate the fractal characteristics of the surface morphology of galvanized sheet and the effect of pressure on the interfacial friction behavior. Two steel plates, GA and GI, produced by Shanghai Baosteel Company, were used as materials to conduct tribological experiments, measure the surface profile and three-dimensional shape of the galvanized sheet, and calculate the fractal dimension and fractal roughness parameters. According to the analysis results of friction surface damage of galvanized sheet, the damage failure parameters of galvanized sheet are calculated. On this basis, according to the adhesive friction theory, the total surface friction value of galvanized sheet is obtained, and the fractal calculation model of galvanized sheet friction is established. The simulation results show that the galvanized sheet has fractal characteristics. The average values of fractal dimension and scale factor of SP781BQ alloy hot-dip galvanized sheet are 1.52 and 0.23 µm, respectively. The average fractal dimension and scale coefficient of HC420/780DPD + Z hot-dip galvanized sheet are 1.60 and 0.11 µm, respectively. The friction coefficient calculated by the proposed method is consistent with the theoretical value, and the error is less than 10%, which proves the accuracy and feasibility of the friction fractal calculation method.

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ELLIS, JOHN, N. E. MAVROMATOS e D. V. NANOPOULOS. "WORLD SHEET FORMULATION OF M THEORY". International Journal of Modern Physics A 13, n. 29 (20 novembre 1998): 5093–112. http://dx.doi.org/10.1142/s0217751x98002377.

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We first review the interpretation of world sheet defects as D branes described by a critical theory in 11 dimensions, that we interpret as M theory. We then show that D-brane recoil induces dynamically an anti-de Sitter (AdS) space–time background, with criticality restored by a twelfth timelike dimension described by a Liouville field. Local physics in the bulk of this AdS11 may be described by an Osp (1|32, R) ⊗ Osp (1|32, R) topological gauge theory (TGT), with nonlocal boundary states in doubleton representations. We draw analogies with structures previously exhibited in two-dimensional black hole models. Wilson loops of "matter" in the TGT may be described by an effective string action, and defect condensation may yield string tension and cause a space–time metric to appear.

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Tesi sul tema "DIMENSION SHEET"

1

Pradhan, Siddharth. "Quantification of Graphene Oxide Structure Using an Improved Model". University of Cincinnati / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1342730902.

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Esche, Sven Karsten. "Developments for two-dimensional sheet metal forming analysis /". The Ohio State University, 1997. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487946103566303.

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3

ISHIHARA, TAKASHI, e YUKIO KANEDA. "Singularity formation in three-dimensional motion of a vortex sheet". Cambridge University Press, 1995. http://hdl.handle.net/2237/10324.

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4

Sakajo, Takashi. "Numerical Computation of three-dimensional vortex sheet with swirl flow". 京都大学 (Kyoto University), 1999. http://hdl.handle.net/2433/181452.

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Mosher, Reed L. "Three-dimensional finite element analysis of sheet-pile cellular cofferdams". Diss., Virginia Tech, 1991. http://hdl.handle.net/10919/37876.

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Abstract (sommario):

The conventional design methods for sheet-pile cellular cofferdams were developed in the 1940's and 1950's based on field and limited experimental observations. The analytical techniques of the day were unable to account for the complexities involved. The procedures used only rudimentary concepts of soil-structure interaction which do not exhibit the true response of the cofferdam for most circumstances. During the past decade it has been demonstrated that with proper consideration of the soil-structure interaction effects, the two-dimensional finite element models can be powerful tools in the investigation of cellular cofferdam behavior. However, universal implementation of the findings of these analyses was difficult to justify, since uncertainties remain about the assumptions made in arriving at the two-dimensional models. The only way to address these uncertainties was to perform a three-dimensional analysis. This investigation has focused on the study of the three-dimensional behavior of Lock and Dam No. 26 (R) sheet—pile cellular cofferdam. The work involved the development of a new three-dimensional soil-structure interaction finite element code for cellular cofferdam modeling, and the application of the new code to the study of the behavior of the first- and second-stage cofferdam at Lock and Dam No. 26 (R). The new code was used to study the cell filling process where the main cell is filled first with the subsequent filling of the arc cell. The finite element results show that interlock forces in the common wall were 29 to 35 percent higher than those in the main cell which are less than those calculated by conventional methods and compare well with the observed values. After cell filling, the new code was used to model the cofferdam under differential loading due to initial dewatering of the interior of the cofferdam and changes in river levels. The finite element analysis results show that increasing differential water loads cause the confining stresses in the cell fill to increase which results in a decrease in the level of mobilized shear strength in the cell fill. This explains why the cellular cofferdam can withstand extremely high lateral loads and lateral deformations without collapsing.
Ph. D.

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6

Reyier, Österling Sofia. "Distributions Of Fiber Characteristics As A Tool To Evaluate Mechanical Pulps". Doctoral thesis, Mittuniversitetet, Avdelningen för kemiteknik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-24175.

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Mechanical pulps are used in paper products such as magazine or news grade printing papers or paperboard. Mechanical pulping gives a high yield; nearly everything in the tree except the bark is used in the paper. This means that mechanical pulping consumes much less wood than chemical pulping, especially to produce a unit area of printing surface. A drawback of mechanical pulp production is the high amounts of electrical energy needed to separate and refine the fibers to a given fiber quality. Mechanical pulps are often produced from slow growing spruce trees of forests in the northern hemisphere resulting in long, slender fibers that are well suited for mechanical pulp products. These fibers have large varieties in geometry, mainly wall thickness and width, depending on seasonal variations and growth conditions. Earlywood fibers typically have thin walls and latewood fibers thick. The background to this study was that a more detailed fiber characterization involving evaluations of distributions of fiber characteristics, may give improved possibilities to optimize the mechanical pulping process and thereby reduce the total electric energy needed to reach a given quality of the pulp and final product. This would result in improved competitiveness as well as less environmental impact. This study evaluated the relation between fiber characteristics in three types of mechanical pulps made from Norway spruce (Picea abies), thermomechanical pulp(TMP), stone groundwood pulp (SGW) and chemithermomechanical pulp (CTMP). In addition, the influence of fibers from these pulp types on sheet characteristics, mainly tensile index, was studied. A comparatively rapid method was presented on how to evaluate the propensity of each fiber to form sheets of high tensile index, by the use of raw data from a commercially available fiber analyzer (FiberLabTM). The developed method gives novel opportunities of evaluating the effect on the fibers of each stage in the mechanical pulping process and has a potential to be applied also on‐line to steer the refining and pulping process by the characteristics of the final pulp and the quality of the final paper. The long fiber fraction is important for the properties of the whole pulp. It was found that fiber wall thickness and external fibrillation were the fibercharacteristics that contributed the most to tensile index of the long fiber fractions in five mechanical pulps (three TMPs, one SGW, one CTMP). The tensile index of handsheets of the long fiber fractions could be predicted by linear regressions using a combination of fiber wall thickness and degree of external fibrillation. The predicted tensile index was denoted BIN, short for Bonding ability INfluence. This resulted in the same linear correlation between BIN and tensile index for 52 samples of the five mechanical pulps studied, each fractionated into five streams(plus feed) in full size hydrocyclones. The Bauer McNett P16/R30 (passed 16 meshwire, retained on a 30 mesh wire) and P30/R50 fractions of each stream were used for the evaluation. The fibers of the SGW had thicker walls and a higher degree of external fibrillation than the TMPs and CTMP, which resulted in a correlation between BIN and tensile index on a different level for the P30/R50 fraction of SGW than the other pulp samples. A BIN model based on averages weighted by each fiber´s wall volume instead of arithmetic averages, took the fiber wall thickness of the SGW into account, and gave one uniform correlation between BIN and tensile index for all pulp samples (12 samples for constructing the model, 46 for validatingit). If the BIN model is used for predicting averages of the tensile index of a sheet, a model based on wall volume weighted data is recommended. To be able to produce BIN distributions where the influence of the length or wall volume of each fiber is taken into account, the BIN model is currently based on arithmetic averages of fiber wall thickness and fibrillation. Fiber width used as a single factor reduced the accuracy of the BIN model. Wall volume weighted averages of fiber width also resulted in a completely changed ranking of the five hydrocyclone streams compared to arithmetic, for two of thefive pulps. This was not seen when fiber width was combined with fiber wallthickness into the factor “collapse resistance index”. In order to avoid too high influence of fiber wall thickness and until the influence of fiber width on BIN and the measurement of fiber width is further evaluated, it is recommended to use length weighted or arithmetic distributions of BIN and other fiber characteristics. A comparably fast method to evaluate the distribution of fiber wall thickness and degree of external fibrillation with high resolution showed that the fiber wallthickness of the latewood fibers was reduced by increasing the refining energy in adouble disc refiner operated at four levels of specific energy input in a commercial TMP production line. This was expected but could not be seen by the use of average values, it was concluded that fiber characteristics in many cases should be evaluated as distributions and not only as averages. BIN distributions of various types of mechanical pulps from Norway spruce showed results that were expected based on knowledge of the particular pulps and processes. Measurements of mixtures of a news‐ and a SC (super calendered) gradeTMP, showed a gradual increase in high‐BIN fibers with higher amounts of SCgrade TMP. The BIN distributions also revealed differences between the pulps that were not seen from average fiber values, for example that the shape of the BINdistributions was similar for two pulps that originated from conical disc refiners, a news grade TMP and the board grade CTMP, although the distributions were on different BIN levels. The SC grade TMP and the SC grade SGW had similar levels of tensile index, but the SGW contained some fibers of very low BIN values which may influence the characteristics of the final paper, for example strength, surface and structure. This shows that the BIN model has the potential of being applied on either the whole or parts of a papermaking process based on mechanical or chemimechanical pulping; the evaluation of distributions of fiber characteristics can contribute to increased knowledge about the process and opportunities to optimize it.

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Karafillis, Apostolos P. (Apostolos Paulos). "Tooling design for three-dimensional sheet metal forming using finite element analysis". Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/11624.

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8

Choudhry, Sanjay. "Two-dimensional finite element analysis of sheet forming processes including bending effects /". The Ohio State University, 1990. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487676847114802.

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9

Pyo, Sangwoo. "Numerical modeling of propeller tip flows with wake sheet roll-up in three dimensions". Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/11278.

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10

Spille, Jan-Hendrik [Verfasser]. "Three-dimensional single particle tracking in a light sheet microscope / Jan-Hendrik Spille". Bonn : Universitäts- und Landesbibliothek Bonn, 2014. http://d-nb.info/1052581986/34.

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Più fonti

Libri sul tema "DIMENSION SHEET"

1

ill, Paul Korky, a cura di. Mrs. Wolf: A 3-dimensional picture book. New York: Dial Books for Young Readers, 1993.

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Korky, Paul, a cura di. Mrs. Wolf: A 3-dimensional picture book. London: Tango, 1992.

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3

Society, Iron and Steel, a cura di. Pocketbook of tolerances for dimensions for sheet steel (including coated products): Carbon high-strength low-alloy, alloy. Warrendale, PA: Iron & Steel Society, 1999.

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4

Society, Iron and Steel, a cura di. Pocketbook of tolerances for dimensions for sheet steel (including coated products): Carbon, high strength low alloy, alloy. Warrendale, PA: Iron & Steel Society, 1997.

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5

Saito, Fuyuki. Development of a three dimensional ice sheet model for numerical studies of Antarctic and Greenland ice sheet. [Tokyo]: University of Tokyo, Center for Climate System Research, 2002.

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Tōkyō Daigaku. Kikō Shisutemu Kenkyū Sentā, a cura di. Development of a three dimensional ice sheet model for numerical studies of Antarctic and Greenland ice sheet. Tokyo]: University of Tokyo, Center for Climate System Research, 2002.

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7

Huybrechts, Philippe. The Antarctic ice sheet and environmental change: A three-dimensional modelling study = Der antarktische Eisschild und globale Umweltveränderungen : eine dreidimensionale Modellstudie. Bremerhaven, Federal Republic of Germany: Alfred Wegener Institute for Polar and Marine Research, 1992.

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8

International, Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes (8th 2011 Seoul Korea. The 8th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes (NUMISHEET 2011), Seoul, Republic of Korea, 21-26 August 2011 / editors, Kwansoo Chung ... [et al.]. Melville, N.Y: American Institute of Physics, 2011.

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International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes (8th 2011 Seoul, Korea. The 8th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes (NUMISHEET 2011), Seoul, Republic of Korea, 21-26 August 2011 / editors, Kwansoo Chung ... [et al.]. Melville, N.Y: American Institute of Physics, 2011.

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C, Newman J., Bigelow C. A e Langley Research Center, a cura di. Three-dimensional CTOA and constraint effects during stable tearing in a thin-sheet material. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1995.

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Capitoli di libri sul tema "DIMENSION SHEET"

1

Mountford, T. S. "Estimates of the Hausdorff dimension of the boundary of positive Brownian sheet components". In Séminaire de Probabilités XXVII, 233–55. Berlin, Heidelberg: Springer Berlin Heidelberg, 1993. http://dx.doi.org/10.1007/bfb0087979.

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2

Groche, Peter, e Michael Henkelmann. "Dimensional Deviation of Roll Formed Components Made of High Strength Steel". In Sheet Metal 2007, 285–92. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-437-5.285.

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3

He, Xiao Cong, Ian Pearson e Ken W. Young. "Three Dimensional Finite Element Analysis of Transverse Free Vibration of Self-Pierce Riveting Beam". In Sheet Metal 2007, 647–54. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-437-5.647.

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4

Boustani, Ihsan. "Two-Dimensional Sheets". In Molecular Modelling and Synthesis of Nanomaterials, 285–362. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-32726-2_6.

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5

Maddalena, Laura, Paolo Pozzi, Nicolò G. Ceffa, Bas van der Hoeven e Elizabeth C. Carroll. "Optogenetics and Light-Sheet Microscopy". In Neuromethods, 231–61. New York, NY: Springer US, 2023. http://dx.doi.org/10.1007/978-1-0716-2764-8_8.

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Abstract (sommario):

AbstractLight-sheet microscopy is a powerful method for imaging small translucent samples in vivo, owing to its unique combination of fast imaging speeds, large field of view, and low phototoxicity. This chapter briefly reviews state-of-the-art technology for variations of light-sheet microscopy. We review recent examples of optogenetics in combination with light-sheet microscopy and discuss some current bottlenecks and horizons of light sheet in all-optical physiology. We describe how 3-dimensional optogenetics can be added to an home-built light-sheet microscope, including technical notes about choices in microscope configuration to consider depending on the time and length scales of interest.

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6

Feyel, Denis, e Arnaud de La Pradelle. "On Infinite Dimensional Sheets". In Potential Theory and Degenerate Partial Differential Operators, 345–59. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-011-0085-4_4.

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7

Li, Yilei. "Dielectric Response of a Thin Sheet". In Probing the Response of Two-Dimensional Crystals by Optical Spectroscopy, 29–32. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-25376-3_4.

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8

Allanson, Oliver. "One-Dimensional Asymmetric Current Sheets". In Theory of One-Dimensional Vlasov-Maxwell Equilibria, 113–36. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-97541-2_4.

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9

Ma, Long, e Yong Ni. "CHAPTER 2. Nanoscale Buckling Mechanics of Ultrathin Sheets". In Inorganic Two-dimensional Nanomaterials, 35–55. Cambridge: Royal Society of Chemistry, 2017. http://dx.doi.org/10.1039/9781788010306-00035.

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10

Fry, Craig D., e S. I. Akasofu. "Three-Dimensional Structure of the Heliospheric Current Sheet". In Astrophysics and Space Science Library, 287–93. Dordrecht: Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-4612-5_35.

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Atti di convegni sul tema "DIMENSION SHEET"

1

Chati, Farid, Fernand Leon, Nicolas Cité, Dominique Decultot e Gerard Maze. "Backscattered acoustic wave from a bent finite dimension sheet". In ECUA 2012 11th European Conference on Underwater Acoustics. Acoustical Society of America, 2012. http://dx.doi.org/10.1121/1.4767970.

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Guidea, Sorin, e T. J. Nye. "Automated Optimal Design for Manufacturability of Sheet/Plate Assemblies". In ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-81508.

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Abstract (sommario):

A wide variety of products are manufactured from raw materials that are in the form of sheets or plates. Once the product is designed, parts are unfolded or flattened into flat blanks, which are nested onto the raw material for cutting. Optimization of nesting and packing problems has been an active research field for many years, and many good algorithms have been created. These algorithms have a fundamental limitation, however, in that they assume the set of blanks to be nested is fixed. In this work we relax this assumption, and by linking a parametric CAD system, a part-unfolding module and a sheet-nesting module that all intercommunicate, nests are created which maintain the parametric dimensions of the assembled product. Given a nest of the set of required blanks, dimensions of the blanks are optimized for a particular objective, such as maximizing raw material utilization or minimizing total use of raw material, subject to assembly, part dimension, part and blank dimension constraints. Once optimized, these blank dimensions are returned to the CAD system to update the product model. Through the use of this system, a designer can simultaneously optimize all the dimensions within a product to minimize manufacturing costs early in the design phase while maintaining acceptable product performance. This paper will demonstrate a prototype of this DFM system, discuss issues such as performance improvement through randomized trials, and suggest how additional design objectives (e.g., strength to weight ratio, stiffness, etc.) can be integrated with the reduced manufacturing cost objective.

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Choudhury, Nilotpal, Tarun Samadder, Ravi Tiwari, Huimei Zhou, Richard G. Southwick, Miaomiao Wang e Souvik Mahapatra. "Analysis of Sheet Dimension (W, L) Dependence of NBTI in GAA-SNS FETs". In 2021 IEEE International Reliability Physics Symposium (IRPS). IEEE, 2021. http://dx.doi.org/10.1109/irps46558.2021.9405137.

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Liu, Weiwei, Binghui Li e Caiming Sun. "Novel Blue-green Light Phased Array by Light-sheet-excited One-dimension Strip Grating Array". In Optical Fiber Communication Conference. Washington, D.C.: Optica Publishing Group, 2023. http://dx.doi.org/10.1364/ofc.2023.th3a.6.

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We demonstrate a novel blue-green light phased array by light-sheet-excited 1D strip waveguide grating with nearly spot emission profile. By tuning wavelength, the range 15° of beam steering was achieved.

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Long, Tang, Wang Hu, Cai Yong, Mao Lichen e Li Guangyao. "Springback Control of Sheet Metal Forming Based on High Dimension Model Representation and Genetic Algorithm". In THE 8TH INTERNATIONAL CONFERENCE AND WORKSHOP ON NUMERICAL SIMULATION OF 3D SHEET METAL FORMING PROCESSES (NUMISHEET 2011). AIP, 2011. http://dx.doi.org/10.1063/1.3623719.

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Liu, Weiwei, Binghui Li e Caiming Sun. "Novel Blue-green Light Phased Array by Light-sheet-excited One-dimension Strip Grating Array". In 2023 Optical Fiber Communications Conference and Exhibition (OFC). IEEE, 2023. http://dx.doi.org/10.23919/ofc49934.2023.10116508.

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Jadhav, Vishwas S., e Ajit D. Kelkar. "Fabrication, Processing and Characterization of Carbon Fibre Reinforced Laminated Composite Embedded With Graphene Lattice Sheets". In ASME 2021 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/imece2021-71191.

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Abstract This manuscript introduces the challenges in the fabrication of graphene sheet reinforced non-crimp fabric (NCF) composite laminates and their influence on the interlaminar strength of the composite laminates. In the current work, the laminates were fabricated using non-crimp carbon fabric prepreg along with 50,120 and 240 μm thick graphene sheets at the mid-plane. Double Cantilever Beam (DCB) tests are done as per ASTM 5528 using INSTRON electromechanical testing system. Modified Beam Theory method used to compute Mode I fracture toughness, using load, displacement, specimen dimension, and crack opening displacement. The graphene sheets are brittle; little bonding between the graphene and matrix observed during the fabrication process results in a fragile interface. To overcome this problem, graphene sheets were converted into a lattice structure. The lattice structure used in the present research had horizontal, vertical, and square grids. Effects of sheet thickness, grid pattern were evaluated by Mode I fracture toughness, with and without nanoengineered enhanced laminates. Axio Image upright microscope used to compare the bonding at the midplane after the DCB test. The results indicate that the composite laminates fabricated using lattice graphene structure had better interlaminar strength than the laminates fabricated with straight graphene sheets.

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Lu, B., J. Cao e H. Ou. "Theoretical and Numerical Analysis of Incremental Sheet Forming by Using High Pressure Water Jet". In ASME 2011 International Manufacturing Science and Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/msec2011-50235.

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Incremental sheet forming using water jet (ISF-WJ) is a new sheet metal forming process proposed in recent years. Few reports can be found on this process and some basic questions are unanswered, i.e., the water jet pressure required for plastic forming and the accuracy of this forming process. In this paper, an analytical model was developed to evaluate the size effect in the ISF-WJ process with respect to some key parameters, such as sheet thickness, part dimension, jet size and jet pressure. Three commonly used engineering sheet materials (aluminum, stainless steel and titanium) are studied in the analysis and the formability of water jet on these materials was evaluated. In addition, comparisons are made between the ISF-WJ and conventional ISF process with rigid tool based on finite element simulations. The result suggests that the dimensional accuracy of ISF-WJ may be controlled by a supporting back plate and ISF-WJ shows a better distribution of strain and thickness reduction than ISF process. It also provides a good reference for future ISF-WJ equipment design and development.

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Situ, Quan, Mukesh K. Jain e Don R. Metzger. "Prediction of Trimming Process Parameters in Aluminum Sheet Materials Using FE Method". In ASME/JSME 2004 Pressure Vessels and Piping Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/pvp2004-2745.

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The trimming process is an important step to achieve good dimension and shape of a final product. However, it requires a systematic study of the various parameters involved in material separation. The finite element method was utilized to simulate the trimming process of aluminum sheet materials in aspects of material properties, tooling conditions and process parameters, including different tool configurations, clearances and punch speeds. Punch load versus displacement diagrams and cut edge morphologies obtained from representative clearances and tool configurations were investigated. A two-dimensional plane strain trimming was analyzed using a rate independent material model. An experimentally measured fracture strain was utilized in FE modeling for fracture initiation and development using element deletion technique. A thermally coupled material model was tentatively tested. Results from simulations were compared with experiments and good agreement was obtained for most of the studied conditions. Optimal trimming process parameters such as specific tool configuration, clearance and punch speed are suggested.

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Lian, Jun, Zhongqin Lin, Fusheng Yao e Xinmin Lai. "Analysis of Nonlinear Variation Accumulation in Auto-Body Assembly Process". In ASME 2002 International Mechanical Engineering Congress and Exposition. ASMEDC, 2002. http://dx.doi.org/10.1115/imece2002-32339.

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In the assembly process of auto-body, variations in the geometrical dimensions of sheet metal parts and fixtures are inevitable. These variations accumulate through the multi-station assembly process to form the dimensional variations of the final products. Compared with the assembly of rigid parts, the assembly process of the elastic parts is more complex because the variation accumulation patterns rely much on the variations of fixture, jointing methods and mechanical deformation. This paper aims at analyzing the variation transformation mechanism and accumulation characteristics for the assembly of sheet metal parts based on the analysis of dimensional coordination relations among parts and fixtures. Finite element method (FEM) and Monte-Carlo Simulation (MCS) were used to analyze the effect of jointing contact on variation transformation, while a state equation was developed to describe the variation accumulation mechanism. The result of the analysis indicates that the main characteristics of elastic assembly jointing are the overlap jointing methods and elastic contacts action. The fact that the variation transform coefficients (VTC) are variable makes the assembly variation distribution Non-Gaussian even if the dimension variation of parts is Gaussian distribution. The analysis conclusions have potential value for more reasonable tolerance synthesis of elastic parts assembly.

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Rapporti di organizzazioni sul tema "DIMENSION SHEET"

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Clauser, Charles E., John T. McConville, Claire C. Gordon e Ilse O. Tebbetts. Selection of Dimensions for an Anthropometric Data Base. Volume 2. Dimension Evaluation Sheets. Fort Belvoir, VA: Defense Technical Information Center, maggio 1986. http://dx.doi.org/10.21236/ada179472.

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Pyo, Sangwoo. Numerical Modeling of Propeller Tip Flows with Wake Sheet Roll-up in Three Dimensions. Fort Belvoir, VA: Defense Technical Information Center, luglio 1995. http://dx.doi.org/10.21236/ada298179.

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Semerikov, Serhiy, Illia Teplytskyi, Yuliia Yechkalo, Oksana Markova, Vladimir Soloviev e Arnold Kiv. Computer Simulation of Neural Networks Using Spreadsheets: Dr. Anderson, Welcome Back. [б. в.], giugno 2019. http://dx.doi.org/10.31812/123456789/3178.

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The authors of the given article continue the series presented by the 2018 paper “Computer Simulation of Neural Networks Using Spreadsheets: The Dawn of the Age of Camelot”. This time, they consider mathematical informatics as the basis of higher engineering education fundamentalization. Mathematical informatics deals with smart simulation, information security, long-term data storage and big data management, artificial intelligence systems, etc. The authors suggest studying basic principles of mathematical informatics by applying cloud-oriented means of various levels including those traditionally considered supplementary – spreadsheets. The article considers ways of building neural network models in cloud-oriented spreadsheets, Google Sheets. The model is based on the problem of classifying multi-dimensional data provided in “The Use of Multiple Measurements in Taxonomic Problems” by R. A. Fisher. Edgar Anderson’s role in collecting and preparing the data in the 1920s-1930s is discussed as well as some peculiarities of data selection. There are presented data on the method of multi-dimensional data presentation in the form of an ideograph developed by Anderson and considered one of the first efficient ways of data visualization.

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