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Artículos de revistas sobre el tema "Technique de morphing"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 1 de febrero de 2022

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1

Kang, Ju Young. "Design of Marine Structures Through Morphing Method and Its Supporting Techniques". Marine Technology Society Journal 48, n.º 2 (1 de marzo de 2014): 81–89. http://dx.doi.org/10.4031/mtsj.48.2.7.

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AbstractExternal forms of marine structures directly influence their performance. Therefore, it is important that their shapes are optimized in the design process. Modern design optimization techniques often require fast evaluation of large number of design alternatives, and morphing techniques have the ability to generate a large number of designs on demand. Morphing is a geometric interpolation technique that changes one object into another and is capable of creating an infinite number of intermediate forms from parent models. This paper discusses the application of a morphing technique for rapid generation of marine structures. In addition, the paper presents several supporting techniques for addressing some of the problems associated with morphing. It has been found that the morphing technique is a useful additional tool for product design optimization.

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2

ONODERA, Makoto, Ichiro NISHIGAKI, Yoshimitsu HIRO y Chikara KONGO. "Development of Parametric Mesh Morphing Technique". Transactions of the Japan Society of Mechanical Engineers Series C 74, n.º 742 (2008): 1594–600. http://dx.doi.org/10.1299/kikaic.74.1594.

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3

Onodera, MAKOTO, YOSHIMITSU Hiro y CHIKARA Kongou. "3318 Development of Parametric Mesh Morphing Technique". Proceedings of Design & Systems Conference 2008.18 (2008): 592–95. http://dx.doi.org/10.1299/jsmedsd.2008.18.592.

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4

Quist, Amanda M. "Developing Expressive Ani-Morphs". Animation 12, n.º 1 (marzo de 2017): 7–27. http://dx.doi.org/10.1177/1746847716687991.

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The expressive potential of the morph is most fully realized in animation, a technique known as the ‘ani-morph’. Though ani-morphing has a fascinating history, there is no critical systematization of this technique that allows for direct comparison of one such transformation to another. This article introduces a taxonomical framework that provides a consistent and organized method of examining the visual expressivity of the morph, enabling comprehensive comparisons to be made between diverse morphing sequences. This framework is particularly useful in evaluating the practice of ‘continuous ani-morphing’, or the use of multiple morphs in sequence. The article begins by entering into a detailed taxonomical analysis of several ani-morphs, first by typifying each category of the taxonomy, and then following with a full cataloguing of their progressive stages. A case study supports the conclusion that high expressivity in continuous ani-morphing exists in sequences that employ a range of object relationships and feature-based mid-morphs, particularly through highly active and spatial transformations. The stylistic development of the ani-morph ultimately is instructive in predicting the future of the photo-real or digital morph. Though continuous photo-real morphing has yet to demonstrate the level of expressivity apparent in the history of continuous ani-morphing, the evolution of ani-morphing ultimately suggests how the expressivity of the photo-real morph will develop in the future.

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5

Bao, Paul y Dan Xu. "Multiresolution View Morphing in the Wavelet Domain". International Journal of Virtual Reality 4, n.º 3 (1 de enero de 2000): 21–32. http://dx.doi.org/10.20870/ijvr.2000.4.3.2646.

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This paper presents a new view-synthesis technique using the 2D discrete wavelet-based view morphing. The view morphing is completely based on pairwise images without the camera calibration and depth information of images. First a Fundamental Matrix related to any pair of images is estimated. Then using the fundamental matrix, the pair of image planes is rectified to be parallel with their corresponding points lying on the same scanline, giving an opportunity to generate new views with linear interpolation techniques. The pre-warped images are then decomposed into a hierarchical structure with the wavelet transform. Corresponding coefficients between two decomposed images are linearly interpolated to form the multiresolution representation of an intermediate view. Quantization techniques [10,11] can be embedded here to compress the coefficients for the purpose of reducing the morphing complexity. Finally, during the display, compressed images are decoded and an inverse wavelet transform is applied. A postwarping procedure is employed to transform the interpolated views to its desired position.

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6

Han, Fan y Istvan Szunyogh. "A Morphing-Based Technique for the Verification of Precipitation Forecasts". Monthly Weather Review 144, n.º 1 (29 de diciembre de 2015): 295–313. http://dx.doi.org/10.1175/mwr-d-15-0172.1.

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Abstract This paper describes a morphing-based approach for the verification of precipitation forecasts. This approach employs a pyramid matching algorithm to morph the precipitation features in a forecast into features that match the related precipitation features in the verifying analysis (observations) as closely as possible. The algorithm computes an optical flow (vector field) that maps the original forecast features into the morphed forecast features. The optical flow also provides quantitative information about the error in the location of the forecast features. This information, combined with information about the error in the prediction of the total precipitation over the verification domain, is used to quantify the structure error in the precipitation forecast. The proposed approach has three novel aspects compared to the published morphing-based verification strategies. First, it imposes a constraint on the pyramid matching algorithm to prevent overconvergence toward strong precipitation features during morphing. Second, it introduces an objective criterion for the selection of the subsampling parameter to avoid splitting or distorting features due to an arbitrary maximum displacement limit. Third, the proposed definitions of the location and structure errors are new. The behavior of the proposed multivariate verification metrics is investigated by applications to both idealized and numerical forecast examples.

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7

A., Elef,, H. Mousa M. y Nassar H. "An efficient technique for morphing zero-genus 3D objects". International Journal of Physical Sciences 9, n.º 13 (16 de julio de 2014): 302–8. http://dx.doi.org/10.5897/ijps2014.4157.

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8

SIGURDSON, K. "Morphing the CMB: a technique for interpolating power spectra". New Astronomy 5, n.º 2 (abril de 2000): 91–101. http://dx.doi.org/10.1016/s1384-1076(00)00007-5.

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9

Onodera, Makoto. "2412 Development of Fit Morphing Technique to CAD-Data". Proceedings of Design & Systems Conference 2014.24 (2014): _2412–1_—_2412–10_. http://dx.doi.org/10.1299/jsmedsd.2014.24._2412-1_.

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10

Kuchař, Michal, Petr Henyš, Pavel Rejtar y Petr Hájek. "Shape morphing technique can accurately predict pelvic bone landmarks". International Journal of Legal Medicine 135, n.º 4 (27 de enero de 2021): 1617–26. http://dx.doi.org/10.1007/s00414-021-02501-6.

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11

Kose, Oguz y Tugrul Oktay. "Simultaneous quadrotor autopilot system and collective morphing system design". Aircraft Engineering and Aerospace Technology 92, n.º 7 (13 de junio de 2020): 1093–100. http://dx.doi.org/10.1108/aeat-01-2020-0026.

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Purpose The purpose of this paper is to design a quadrotor with collective morphing using the simultaneous perturbation stochastic approximation (SPSA) optimization algorithm. Design/methodology/approach Quadrotor design is made by using Solidworks drawing program and some mathematical performance relations. Modelling and simulation are performed in Matlab/Simulink program by using the state space model approaches with the parameters mostly taken from Solidworks. Proportional integral derivative (PID) approach is used as control technique. Morphing amount and the best PID coefficients are determined by using SPSA algorithm. Findings By using SPSA algorithm, the amount of morphing and the best PID coefficients are determined, and the quadrotor longitudinal and lateral flights are made most stable via morphing. Research limitations/implications It takes quite a long time to model the quadrotor in Solidworks and Matlab/Simulink with the state space model and using the SPSA algorithm. However, this situation is overcome with the proposed model. Practical implications Optimization with SPSA is very useful in determining the amount of morphing and PID coefficients for quadrotors. Social implications SPSA optimization method is useful in terms of cost, time and practicality. Originality/value It is released to improve performance with morphing, to determine morphing rate with SPSA algorithm and to determine PID coefficients accordingly.

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12

Sodja, Jurij, Marcias J. Martinez, John C. Simpson y Roeland De Breuker. "Experimental evaluation of a morphing leading edge concept". Journal of Intelligent Material Systems and Structures 30, n.º 18-19 (2 de agosto de 2019): 2953–69. http://dx.doi.org/10.1177/1045389x19862369.

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This article presents an experimental evaluation of a morphing leading edge demonstrator by investigating its morphed shape, the level of induced strains in the airfoil skin, the actuation force, and the morphing mechanism’s capability to lock and transfer the applied loads. In addition, a finite element model of the demonstrator is assembled comprising an elastic morphing skin and a kinematic morphing mechanism. The obtained results are used to assess whether the demonstrator performs according to the design objectives, such as the target shape, the character of the morphing deformation and the morphing mechanism locking, applied during the design process. The comparison between experimental and numerical results yielded a good agreement in terms of observed morphed shape and pertaining strains. The average difference in morphed shape was less than 0.08% chord at the maximum actuator extension. The observed difference in the respective strains was less than 400 micro-strains. A significant difference, up to 70%, was observed in the actuation force, which was attributed to the modelling assumptions and to the force measurement technique employed in the experiment. Nevertheless, both results show good qualitative agreement showing similar trends.

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13

Di Paola, F., D. Casella, S. Dietrich, A. Mugnai, E. Ricciardelli, F. Romano y P. Sanò. "Combined MW-IR Precipitation Evolving Technique (PET) of convective rain fields". Natural Hazards and Earth System Sciences 12, n.º 11 (29 de noviembre de 2012): 3557–70. http://dx.doi.org/10.5194/nhess-12-3557-2012.

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Abstract. This paper describes a new multi-sensor approach for convective rain cell continuous monitoring based on rainfall derived from Passive Microwave (PM) remote sensing from the Low Earth Orbit (LEO) satellite coupled with Infrared (IR) remote sensing Brightness Temperature (TB) from the Geosynchronous (GEO) orbit satellite. The proposed technique, which we call Precipitation Evolving Technique (PET), propagates forward in time and space the last available rain-rate (RR) maps derived from Advanced Microwave Sounding Units (AMSU) and Microwave Humidity Sounder (MHS) observations by using IR TB maps of water vapor (6.2 μm) and thermal-IR (10.8 μm) channels from a Spinning Enhanced Visible and Infrared Imager (SEVIRI) radiometer. PET is based on two different modules, the first for morphing and tracking rain cells and the second for dynamic calibration IR-RR. The Morphing module uses two consecutive IR data to identify the motion vector to be applied to the rain field so as to propagate it in time and space, whilst the Calibration module computes the dynamic relationship between IR and RR in order to take into account genesis, extinction or size variation of rain cells. Finally, a combination of the Morphing and Calibration output provides a rainfall map at IR space and time scale, and the whole procedure is reiterated by using the last RR map output until a new MW-based rainfall is available. The PET results have been analyzed with respect to two different PM-RR retrieval algorithms for seven case studies referring to different rainfall convective events. The qualitative, dichotomous and continuous assessments show an overall ability of this technique to propagate rain field at least for 2–3 h propagation time.

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14

Zhu, Lei, Yan Yang, Steven Haker y Allen Tannenbaum. "An Image Morphing Technique Based on Optimal Mass Preserving Mapping". IEEE Transactions on Image Processing 16, n.º 6 (junio de 2007): 1481–95. http://dx.doi.org/10.1109/tip.2007.896637.

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15

Citrin, Wayne y Judith Gurka. "A low-overhead technique for dynamic blackboarding using morphing technology". Computers & Education 26, n.º 4 (mayo de 1996): 189–96. http://dx.doi.org/10.1016/0360-1315(96)00006-1.

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16

Nicassio, F., G. Scarselli, F. Pinto, F. Ciampa, O. Iervolino y M. Meo. "Low energy actuation technique of bistable composites for aircraft morphing". Aerospace Science and Technology 75 (abril de 2018): 35–46. http://dx.doi.org/10.1016/j.ast.2017.12.040.

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17

Mao, Qian, Chin-Chen Chang, Lein Harn y Shih-Chang Chang. "An image-based key agreement protocol using the morphing technique". Multimedia Tools and Applications 74, n.º 9 (28 de noviembre de 2013): 3207–29. http://dx.doi.org/10.1007/s11042-013-1780-6.

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18

Hayden, Angela, Ramesh S. Bhatt, Jane E. Joseph y James W. Tanaka. "The Other-Race Effect in Infancy: Evidence Using a Morphing Technique". Infancy 12, n.º 1 (1 de julio de 2007): 95–104. http://dx.doi.org/10.1111/j.1532-7078.2007.tb00235.x.

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19

Heinisch, Christine, Hubert R. Dinse, Martin Tegenthoff, Georg Juckel y Martin Brüne. "An rTMS study into self-face recognition using video-morphing technique". Social Cognitive and Affective Neuroscience 6, n.º 4 (29 de junio de 2010): 442–49. http://dx.doi.org/10.1093/scan/nsq062.

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20

Johnstone, A. M., A. D. Stewart, P. J. Benson, M. Kalafati, L. Rectenwald y G. Horgan. "Assessment of body image in obesity using a digital morphing technique". Journal of Human Nutrition and Dietetics 21, n.º 3 (junio de 2008): 256–67. http://dx.doi.org/10.1111/j.1365-277x.2008.00862.x.

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21

Kalem, Sid'Ali y Assia Kourgli. "Irregular Morphing for Real-Time Rendering of Large Terrain". ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLI-B3 (10 de junio de 2016): 755–62. http://dx.doi.org/10.5194/isprsarchives-xli-b3-755-2016.

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The following paper proposes an alternative approach to the real-time adaptive triangulation problem. A new region-based multi-resolution approach for terrain rendering is described which improves on-the-fly the distribution of the density of triangles inside the tile after selecting appropriate Level-Of-Detail by an adaptive sampling. This proposed approach organizes the heightmap into a QuadTree of tiles that are processed independently. This technique combines the benefits of both Triangular Irregular Network approach and region-based multi-resolution approach by improving the distribution of the density of triangles inside the tile. Our technique morphs the initial regular grid of the tile to deformed grid in order to minimize approximation error. The proposed technique strives to combine large tile size and real-time processing while guaranteeing an upper bound on the screen space error. Thus, this approach adapts terrain rendering process to local surface characteristics and enables on-the-fly handling of large amount of terrain data. Morphing is based-on the multi-resolution wavelet analysis. The use of the D2WT multi-resolution analysis of the terrain height-map speeds up processing and permits to satisfy an interactive terrain rendering. Tests and experiments demonstrate that Haar B-Spline wavelet, well known for its properties of localization and its compact support, is suitable for fast and accurate redistribution. Such technique could be exploited in client-server architecture for supporting interactive high-quality remote visualization of very large terrain.

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22

Kalem, Sid'Ali y Assia Kourgli. "Irregular Morphing for Real-Time Rendering of Large Terrain". ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLI-B3 (10 de junio de 2016): 755–62. http://dx.doi.org/10.5194/isprs-archives-xli-b3-755-2016.

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The following paper proposes an alternative approach to the real-time adaptive triangulation problem. A new region-based multi-resolution approach for terrain rendering is described which improves on-the-fly the distribution of the density of triangles inside the tile after selecting appropriate Level-Of-Detail by an adaptive sampling. This proposed approach organizes the heightmap into a QuadTree of tiles that are processed independently. This technique combines the benefits of both Triangular Irregular Network approach and region-based multi-resolution approach by improving the distribution of the density of triangles inside the tile. Our technique morphs the initial regular grid of the tile to deformed grid in order to minimize approximation error. The proposed technique strives to combine large tile size and real-time processing while guaranteeing an upper bound on the screen space error. Thus, this approach adapts terrain rendering process to local surface characteristics and enables on-the-fly handling of large amount of terrain data. Morphing is based-on the multi-resolution wavelet analysis. The use of the D2WT multi-resolution analysis of the terrain height-map speeds up processing and permits to satisfy an interactive terrain rendering. Tests and experiments demonstrate that Haar B-Spline wavelet, well known for its properties of localization and its compact support, is suitable for fast and accurate redistribution. Such technique could be exploited in client-server architecture for supporting interactive high-quality remote visualization of very large terrain.

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23

Kang, Ju-Young y Byung-Suk Lee. "Application of morphing technique with mesh-merging in rapid hull form generation". International Journal of Naval Architecture and Ocean Engineering 4, n.º 3 (30 de septiembre de 2012): 228–40. http://dx.doi.org/10.3744/jnaoe.2012.4.3.228.

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24

Kang, Ju Young y Byung Suk Lee. "Application of morphing technique with mesh-merging in rapid hull form generation". International Journal of Naval Architecture and Ocean Engineering 4, n.º 3 (septiembre de 2012): 228–40. http://dx.doi.org/10.2478/ijnaoe-2013-0092.

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25

Onodera, MAKOTO, YOSHIMITSU Hiro y CHIKARA Kongou. "2211 Development of Mesh Morphing Technique Involving Addition and Deletion of Feature". Proceedings of Design & Systems Conference 2009.19 (2009): 380–85. http://dx.doi.org/10.1299/jsmedsd.2009.19.380.

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26

LUCAS, L., F. TRUNDE y N. BONNET. "Time-dependent 3D Data Sets Rendering: an Extension of the Morphing Technique". Journal of Visualization and Computer Animation 7, n.º 4 (octubre de 1996): 193–209. http://dx.doi.org/10.1002/(sici)1099-1778(199610)7:4<193::aid-vis144>3.0.co;2-1.

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27

Oliveros, Pauline. "Simulating, mirroring, morphing, and blurring acoustic space as an extended instrumental technique." Journal of the Acoustical Society of America 127, n.º 3 (marzo de 2010): 2011. http://dx.doi.org/10.1121/1.3385228.

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28

Han, Fan y Istvan Szunyogh. "A Technique for the Verification of Precipitation Forecasts and Its Application to a Problem of Predictability". Monthly Weather Review 146, n.º 5 (24 de abril de 2018): 1303–18. http://dx.doi.org/10.1175/mwr-d-17-0040.1.

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Abstract A new morphing-based technique is proposed for the verification of precipitation forecasts for which the location error can be described by a spatial shift. An adaptation of the structural similarity index measure (SSIM) of image processing to the precipitation forecast verification problem, called the amplitude and structural similarity index (ASSIM), is also introduced. ASSIM is used to measure both the convergence of the new morphing algorithm, which is an iterative scheme, and the amplitude and structure component of the forecast error. The behavior of the proposed technique, which could also be applied to other forecast parameters with sharp gradients (e.g., potential vorticity), is illustrated with idealized and realistic examples. One of these examples examines the predictability of the location of precipitation events associated with winter storms. It is found that the functional dependence of the average magnitude of the location error on the forecast lead time is qualitatively similar to that of the root-mean-square error of the fields of the conventional atmospheric state variables (e.g., geopotential height). Quantitatively, the average magnitude of the estimated location error is about 40 km at initial time, 110 km at day 1, 250 km at day 3, and 750 km at week 1, and it eventually saturates at about week 2.

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29

Takehara, Takuma y Naoto Suzuki. "Morphed Images of Basic Emotional Expressions: Ratings on Russell's Bipolar Field". Perceptual and Motor Skills 85, n.º 3 (diciembre de 1997): 1003–10. http://dx.doi.org/10.2466/pms.1997.85.3.1003.

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An object may be gradually changed into another object by a technique called “morphing” as in the current study. Although in some studies, such as by Coren and Russell, subjects were asked to rate psychologically synthesized facial images seen in a stereoscope, there do not seem to be any studies in which facial images were physically synthesized as morphed images Our question then was how subjects would rate them. Multidimensional scaling indicated that ratings of facial images, physically synthesized by morphing, showed essentially the same configuration as those of psychologically synthesized faces and that our results conformed to the well-known dimensions of emotional space. In contrast, ratings of fear might not conform to the dimensional emotional space, suggesting cultural differences in emotion between Japan and the United States.

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30

Baghdadi, M., S. Elkoush, B. Akle y M. Elkhoury. "Dynamic shape optimization of a vertical-axis wind turbine via blade morphing technique". Renewable Energy 154 (julio de 2020): 239–51. http://dx.doi.org/10.1016/j.renene.2020.03.015.

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31

Park, Byoung-Keon, Bon-Yeol Koo, Eun-Joo Park, Jae-Wook Chae, Soon-Hyuk Lee y Jae-Jung Kim. "Musculoskeletal Models to Predict Patient-specific Gait Patterns Using Function-based Morphing Technique". Transactions of the Society of CAD/CAM Engineers 17, n.º 6 (1 de diciembre de 2012): 443–55. http://dx.doi.org/10.7315/cadcam.2012.443.

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32

ONODERA, Makoto, Ichiro NISHIGAKI, Yoshimitsu HIRO y Chikara KONGO. "A Mesh Morphing Technique Involving Addition and Deletion of Features for Tetrahedral Meshes". Journal of Environment and Engineering 6, n.º 3 (2011): 595–603. http://dx.doi.org/10.1299/jee.6.595.

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33

Tomić, Miloš C., Zoran V. Djinović, Michael Scheerer y Slobodan J. Petricevic. "Measurement of morphing wing deflection by a cross-coherence fiber optic interferometric technique". Smart Materials and Structures 27, n.º 1 (7 de diciembre de 2017): 015017. http://dx.doi.org/10.1088/1361-665x/aa9afe.

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34

K, Pranathi, Ravi Kumar G y Aditya J S S. "Fault Analysis On Multi-Terminal System Using Wavelet Transform And Wavelet Morphing Technique". International Journal of Electrical and Electronics Engineering 8, n.º 6 (25 de junio de 2021): 28–37. http://dx.doi.org/10.14445/23488379/ijeee-v8i6p105.

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35

Pompa, E., S. Porziani, C. Groth, A. Chiappa, G. D’Amico, E. Costa, S. Sorrentino et al. "CAD model update on as-built geometries with morphing technique: ITER winding pack". IOP Conference Series: Materials Science and Engineering 1038, n.º 1 (1 de febrero de 2021): 012082. http://dx.doi.org/10.1088/1757-899x/1038/1/012082.

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36

Jang, Mi-Hwa y Jae-Cheol Moon. "The Characteristics of Neuro-image in Post-cinema through Morphing Technique in (2013)". Journal of the Korea Entertainment Industry Association 15, n.º 5 (31 de julio de 2021): 45–53. http://dx.doi.org/10.21184/jkeia.2021.7.15.5.45.

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37

De Gaspari, Alessandro. "Multiobjective Optimization for the Aero-Structural Design of Adaptive Compliant Wing Devices". Applied Sciences 10, n.º 18 (13 de septiembre de 2020): 6380. http://dx.doi.org/10.3390/app10186380.

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The design of morphing structures must combine conflicting structural requirements and multiple load conditions that are related to the aerodynamic shapes aimed at optimizing aircraft performance. This article proposes a multilevel approach for the design of adaptive compliant wing devices. A set of aerodynamic shapes, and associated their loads, is defined by a shape optimization, coupled with a three-dimensional parametric technique, that can identify only feasible shape changes due to the morphing. A topology and sizing multiobjective optimization drives the Pareto-optimal structural design of the compliant structure, which is able to deform itself to match, once actuated, all of the previously defined aerodynamic shapes. Next two design levels produce a more detailed solution which is extended until the definition of the complete device. A 90 pax, twin prop green regional aircraft is used as an innovative aircraft demonstration platform for the design of the morphing droop nose to be installed on the wing. The results show the structural capabilities of this device in terms of the external shape quality and the strain requirements. This work enables the validation of the design method and prove the functionality of compliant structures when accounting for the aeroelastic effects due to the interaction with the wing-box.

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38

Cruz, Josias Da Silva, Igor Henrique Coelho Alves, Cleidson Da Silva Alves, Nélio Moura de Figueiredo, Evanice Pinheiro Gomes y Carlos Eduardo Aguiar de Souza Costa. "EQUAÇÕES DE CHUVAS INTENSAS COM DADOS CPC MORPHING TECHNIQUE (CMORPH) PARA O MUNICÍPIO DE ALTAMIRA - PA". IRRIGA 24, n.º 1 (29 de marzo de 2019): 192–207. http://dx.doi.org/10.15809/irriga.2019v24n1p192-207.

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EQUAÇÕES DE CHUVAS INTENSAS COM DADOS CPC MORPHING TECHNIQUE (CMORPH) PARA O MUNICÍPIO DE ALTAMIRA - PA JOSIAS DA SILVA CRUZ1; IGOR HENRIQUE COELHO ALVES1; CLEIDSON DA SILVA ALVES1; NELIO MOURA DE FIGUEIREDO2; EVANICE PINHEIRO GOMES1 E CARLOS EDUARDO AGUIAR DE SOUZA COSTA1 1Programa de Pós-Graduação de Engenharia de Civil, Universidade Federal do Pará, Rua Augusto Corrêa, 1 - Guamá, 66075-110, Belém – Pará – Brasil. E-mail: josias.cruz75@gmail.com, igor_alves12@yahoo.com.br, cleidsonalves.eng.mecanica@gmail.com, vava51.gomes@gmail.com, eduardoaguiarsc@hotmail.com 2Faculdade de Engenharia Naval, Universidade Federal do Pará, Rua Augusto Corrêa, 1 - Guamá, 66075-110, Belém – Pará – Brasil. E-mail: neliomfigueiredo@outlook.com 1 RESUMO As equações de chuvas intensas são fundamentais para o dimensionamento de projetos hidráulicos, porém, na Amazônia, há dificuldade na obtenção de séries históricas consistentes para a geração dessas equações. Assim, o objetivo deste estudo foi utilizar dados de precipitação obtidos por satélite como uma nova alternativa para gerar equações de chuvas intensas. Além dos dados de pluviômetro, utilizou-se os dados de precipitação obtidos como produtos da Climate Prediction Center Morphing Technique (CMORPH) para o município de Altamira, PA. A partir desses últimos, foram escolhidos três pontos de leitura no município, chamados de estações sintéticas 1, 2 e 3. Usou-se a distribuição de extremo tipo I (Gumbel) para gerar curvas IDFs para diferentes tempos de retorno (TR) e durações. As estações sintéticas 1 e 3 tiveram bons ajustes às curvas teóricas geradas, porém a sintética 2 subestimou os valores, sendo esta com a menor média de precipitação extrema. As curvas IDF derivadas das equações tiveram coeficiente de ajustes satisfatórios. Deste modo, é possível afirmar que os dados de satélite são alternativas viáveis na geração de curvas IDF, sendo essenciais para locais onde não existem registros históricos de precipitação. Palavras-Chave: Curvas IDF, Distribuição de Gumbel, Obras Hidráulicas. CRUZ, J. S.; ALVES, I. H. C.; ALVES, C. S.; FIGUEIREDO, N. M.; GOMES, E. P.; COSTA, C. E. A. S. C. INTENSE RAINFALL EQUATIONS IN THE AMAZON REGION WITH DATA CPC MORPHING TECHNIQUE (CMORPH) 2 ABSTRACT Intense rainfall equations are fundamental for the design of hydraulic projects, however, in Amazon, it is difficult to obtain consistent historical series to generate these equations. Thus, the objective of this study was to use precipitation data obtained by satellite as a new alternative to generate intense rainfall equations. In addition to rain gauge data, precipitation data obtained as products of the Climate Prediction Center Morphing Technique (CMORPH) for the municipality of Altamira, PA were used. From the latter, three reading points were chosen in the municipality, called synthetic stations 1, 2 and 3. The I-type distribution (Gumbel) was used to generate IDF curves for different return times (TR) and durations. Synthetic stations 1 and 3 had good adjustments to the theoretical curves generated, but synthetic 2 underestimated the values, and presented the lowest average of extreme precipitation. IDF curves derived from the equations had a satisfactory coefficient of adjustment. In this way, it is possible to affirm that satellite data are viable alternatives in the generation of IDF curves, being essential for places where there are no historical records of precipitation. Keywords: IDF curves, Gumbel distribution, Hydraulic Works.

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Campanella, S., C. Hanoteau, X. Seron, F. Joassin y R. Bruyer. "Categorical perception of unfamiliar facial identities, the face-space metaphor, and the morphing technique". Visual Cognition 10, n.º 2 (febrero de 2003): 129–56. http://dx.doi.org/10.1080/713756676.

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Nitta, Hiroshi y Kazuhide Hashiya. "Self-face perception in 12-month-old infants: A study using the morphing technique". Infant Behavior and Development 62 (febrero de 2021): 101479. http://dx.doi.org/10.1016/j.infbeh.2020.101479.

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Giudice, J. Sebastian, Ahmed Alshareef, Taotao Wu, Christina A. Gancayco, Kristen A. Reynier, Nicholas J. Tustison, T. Jason Druzgal y Matthew B. Panzer. "An Image Registration-Based Morphing Technique for Generating Subject-Specific Brain Finite Element Models". Annals of Biomedical Engineering 48, n.º 10 (28 de julio de 2020): 2412–24. http://dx.doi.org/10.1007/s10439-020-02584-z.

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LIU, WENYU, HUA LI y GUANGXI ZHU. "NON-RIGID BODY INTERPOLATION BASED ON GENERALIZED MORPHOLOGIC MORPHING". International Journal of Image and Graphics 03, n.º 02 (abril de 2003): 325–44. http://dx.doi.org/10.1142/s0219467803001032.

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This paper presents a new technique for non-rigid body interpolation based on generalized morphologic morphing. Non-rigid body interpolation can be divided into non-rigid body metamorphosis and local rigid body rotation. By constructing mappings between the two convex subsets, this approach can solve the metamorphosis problem of two non-homotopic objects. Based on the model of the normal vector sphere for polyhedrons, a fast morphologic summation algorithm for two convex polyhedrons is also proposed; this method avoids much excrescent computation and is faster than most classical implementation. This paper provides the proof of the principle of metamorphosis and discusses the different results of the metamorphosis process for the different objects. It is shown through the experiments that this approach can be applied to automatic font composition and interpolation between two key-frames in 3D computer animation as well as in many other practical applications.

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Zilles, Anne, Olivier Martineau-Huynh, Kumiko Kotera, Matias Tueros, Krijn de Vries, Washington Carvalho y Valentin Niess. "Radio Morphing - towards a fast computation of the radio signal from air-showers". EPJ Web of Conferences 216 (2019): 03012. http://dx.doi.org/10.1051/epjconf/201921603012.

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Over the last decades, radio detection of air showers has been established as a promising detection technique for ultrahigh-energy cosmic rays and neutrinos. Very large or dense antenna arrays are necessary to be proficient at collecting information about these particles and understanding their properties accurately. The exploitation of such arrays requires to run massive air-shower simulations to evaluate the radio signal at each antenna position, taking into account features such as the ground topology. In order to reduce computational costs, we have developed a fast computation of the emitted radio signal on the basis of generic shower simulations, called Radio Morphing. The method consists in the calculation of the radio signal of any air-shower by i) a scaling of the electric-field amplitude of a reference air shower to the target shower, ii) an isometry on the simulated positions and iii) an interpolation of the radio pulse at the desired position. This technique enables one to gain many orders of magnitude in CPU time compared to a standard computation. In this contribution, we present this novel tool and explain its methodology. In particular, Radio Morphing will be a key element for the simulation chain of the Giant Radio Array for Neutrino Detection (GRAND) project, that aims at detecting ultra-high-energy neutrinos with an array of 200 000 radio antennas in mountainous regions.

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Hosseini, Azim, Sasan Tavakoli, Abbas Dashtimanesh, Prasanta K. Sahoo y Mihkel Kõrgesaar. "Performance Prediction of a Hard-Chine Planing Hull by Employing Different CFD Models". Journal of Marine Science and Engineering 9, n.º 5 (29 de abril de 2021): 481. http://dx.doi.org/10.3390/jmse9050481.

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This paper presents CFD (Computational Fluid Dynamics) simulations of the performance of a planing hull in a calm-water condition, aiming to evaluate similarities and differences between results of different CFD models. The key differences between these models are the ways they use to compute the turbulent flow and simulate the motion of the vessel. The planing motion of a vessel on water leads to a strong turbulent fluid flow motion, and the movement of the vessel from its initial position can be relatively significant, which makes the simulation of the problem challenging. Two different frameworks including k-ε and DES (Detached Eddy Simulation) methods are employed to model the turbulence behavior of the fluid motion of the air–water flow around the boat. Vertical motions of the rigid solid body in the fluid domain, which eventually converge to steady linear and angular displacements, are numerically modeled by using two approaches, including morphing and overset techniques. All simulations are performed with a similar mesh structure which allows us to evaluate the differences between results of the applied mesh motions in terms of computation of turbulent air–water flow around the vessel. Through quantitative comparisons, the morphing technique has been seen to result in smaller errors in the prediction of the running trim angle at high speeds. Numerical observations suggest that a DES model can modify the accuracy of the morphing mesh simulations in the prediction of the trim angle, especially at high-speeds. The DES model has been seen to increase the accuracy of the model in the computation of the resistance of the vessel in a high-speed operation, as well. This better level of accuracy in the prediction of resistance is a result of the calculation of the turbulent eddies emerging in the water flow in the downstream zone, which are not captured when a k-ε framework is employed. The morphing approach itself can also increase the accuracy of the resistance prediction. The overset method, however, overpredicts the resistance force. This overprediction is caused by the larger vorticity, computed in the direction of the waves, generated under the bow of the vessel. Furthermore, the overset technique is observed to result in larger hydrodynamic pressure on the stagnation line, which is linked to the greater trim angle, predicted by this approach. The DES model is seen to result in extra-damping of the second and third crests of transom waves as it calculates the stronger eddies in the wake of the boat. Overall, a combination of the morphing and DES models is recommended to be used for CFD modeling of a planing hull at high-speeds. This combined CFD model might be relatively slower in terms of computational time, but it provides a greater level of accuracy in the performance prediction, and can predict the energy damping, developed in the surrounding water. Finally, the results of the present paper demonstrate that a better level of accuracy in the performance prediction of the vessel might also be achieved when an overset mesh motion is used. This can be attained in future by modifying the mesh structure in such a way that vorticity is not overpredicted and the generated eddies, emerging when a DES model is employed, are captured properly.

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Yildirim, Vedat, Alexander Hemprich, Martin Gründl y Niels Christian Pausch. "Panel perception of facial appearance of cleft patients generated by use of a morphing technique". Oral and Maxillofacial Surgery 18, n.º 3 (19 de enero de 2014): 331–40. http://dx.doi.org/10.1007/s10006-014-0441-x.

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Biancolini, Marco Evangelos, Emiliano Costa, Ubaldo Cella, Corrado Groth, Gregor Veble y Matej Andrejašič. "Glider fuselage-wing junction optimization using CFD and RBF mesh morphing". Aircraft Engineering and Aerospace Technology 88, n.º 6 (3 de octubre de 2016): 740–52. http://dx.doi.org/10.1108/aeat-12-2014-0211.

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Purpose The present paper aims to address the description of a numerical optimization procedure, based on mesh morphing, and its application for the improvement of the aerodynamic performance of an industrial glider which suffers of a large separation occurring in the wing–fuselage junction region at high incidence angles. Design/methodology/approach Shape variations were applied to the baseline configuration through a mesh morphing technique founded on the mathematical framework of radial basis functions (RBF). The aerodynamic solutions were obtained coupling an RANS code with the mesh morphing tool RBF Morph™. Two shape modifiers were set up to generate a parametric numerical model. An optimization procedure, based on a design of experiment sampling, was set up implementing the fully automated workflow within a high performance computing (HPC) environment. The optimal candidates maximizing the aerodynamic efficiency were identified by means of a cubic RBF response surface approach. Findings The separation was significantly reduced, modifying the local geometry of fuselage and fairing and maintaining the wing aerofoil unchanged. A relevant aerodynamic efficiency improvement was finally gained. Practical implications The developed procedure proved to be a very powerful and efficient tool in facing aerodynamic design problems. However, it might be computationally very expensive if a large number of design variables are adopted and, in those cases, the method can be suitably used only within the HPC environment. Originality/value Such an optimization study is part of an explorative set of analyses that focused on better addressing the numerical strategies to be used in the development of the EU FP7 Project RBF4AERO.

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Tchatchueng Kammegne, Michel Joël, Yvan Tondji, Ruxandra Mihaela Botez, Lucian Teodor Grigorie, Mahmoud Mamou y Youssef Mébarki. "New control methodology for a morphing wing demonstrator". Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 232, n.º 8 (20 de marzo de 2017): 1479–94. http://dx.doi.org/10.1177/0954410017699003.

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A morphing wing can improve the aircraft aerodynamic performance by changing the wing airfoil depending on the flight conditions. In this paper, a new control methodology is presented for a morphing wing demonstrator tested in a subsonic wind tunnel in the open-loop configuration. Actuators integrated inside the wing are used to modify the flexible structure, which is an integral part of the wing. In this project, the actuators are made in-house and controlled with logic control, which is developed within the main frame of this work. The characterization of the flow (laminar or turbulent) over the wing is obtained starting from the pressure signals measured over the flexible part of the wing (upper surface). The signals are acquired by using some pressure sensors (Kulite sensors) incorporated in this flexible part of the wing upper surface. The technique used to collect Kulite pressure data and the post-processing methodology are explained. The recorded pressure data are sometimes subjected to noise, which is filtered before being processed. The standard deviation and power spectrum visualization of the pressure data approaches are used to evaluate the quality of the flow over the wing and estimate the transition point position in the area monitored by the Kulite sensors. In addition, infrared thermography visualization is implemented to observe the transition region over the entire wing upper surface, and to validate the methodology applied to the pressure data in this way. The demonstrator measures 1.5 m chordwise and 1.5 m spanwise. Four miniature actuators fixed on two actuation lines are used to morph the wing. The wing is also equipped with a rigid aileron. The experimental aerodynamic results obtained after post processing validate the numerical prediction for the transition location.

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Groth, Corrado, Emiliano Costa y Marco Evangelos Biancolini. "RBF-based mesh morphing approach to perform icing simulations in the aviation sector". Aircraft Engineering and Aerospace Technology 91, n.º 4 (1 de abril de 2019): 620–33. http://dx.doi.org/10.1108/aeat-07-2018-0178.

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Purpose Numerical simulation of icing has become a standard. Once the iced shape is known, however, the analyst needs to update the computational fluid dynamics (CFD) grid. This paper aims to propose a method to update the numerical mesh with ice profiles. Design/methodology/approach The present paper concerns a novel and fast radial basis functions (RBF) mesh morphing technique to efficiently and accurately perform ice accretion simulations on industrial models in the aviation sector. This method can be linked to CFD analyses to dynamically reproduce the ice growth. Findings To verify the consistency of the proposed approach, one of the most challenging ice profile selected in the LEWICE manual was replicated and simulated through CFD. To showcase the effectiveness of this technique, predefined ice profiles were automatically applied on two-dimensional (2D) and three-dimensional (3D) cases using both commercial and open-source CFD solvers. Practical implications If ice accreted shapes are available, the meshless characteristic of the proposed approach enables its coupling with the CFD solvers currently supported by the RBF4AERO platform including OpenFOAM, SU2 and ANSYS Fluent. The advantages provided by the use of RBF are the high performance and reliability, due to the fast application of mesh smoothing and the accuracy in controlling surface mesh nodes. Originality/value As far as authors’ knowledge is concerned, this is the first time in scientific literature that RBF are proposed to handle icing simulations. Due to the meshless characteristic of the RBF mesh morphing, the proposed approach is cross solver and can be used for both 2D and 3D geometries.

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Landwehr, Jan R., Aparna A. Labroo, Patricia C. Ellison y Andreas Herrmann. "Gut Liking for the Ordinary: How Product Design Features Help Predict Car Sales". GfK Marketing Intelligence Review 5, n.º 1 (1 de mayo de 2013): 38–43. http://dx.doi.org/10.2478/gfkmir-2014-0025.

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Abstract In many markets, design is one of the key factors in determining a product’s success. The present research offers insights into the role of design for the success of cars, and offers procedures to measure the quality of the designs objectively. The authors show that visual design plays a major role in a product’s success in the automobile market. In the study, two visual design aspects were already sufficient to significantly improve traditional sales forecasting models for cars. Visual prototypicality and visual complexity both had a positive impact on sales, and designs that were perceived as both prototypical and complex were the ones that displayed the best results. Most design evaluation used to be based on subjective measures, but the researcher applied a new, objective procedure to measure prototypicality and complexity. While the latter was detected by the disk space needed by the compressed image file, the new approach for measuring prototypicality was even more sophisticated. It relied on the technique of image morphing. Morphing is a technique that allows the construction of a visual synthesis – or average picture – from a number of individual pictures. Once a car morph is developed, one can determine the visual similarity of different car models to the morph in order to obtain its prototypicality. In principle, this procedure can be automated completely, and including a large number of versions is possible. These measures therefore seem suitable for supporting design decision processes in practice.

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Wu, Zhonghua, Jingchao Lu, Jingping Shi, Yang Liu y Qing Zhou. "Robust Adaptive Neural Control of Morphing Aircraft with Prescribed Performance". Mathematical Problems in Engineering 2017 (2017): 1–16. http://dx.doi.org/10.1155/2017/1401427.

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This study proposes a low-computational composite adaptive neural control scheme for the longitudinal dynamics of a swept-back wing aircraft subject to parameter uncertainties. To efficiently release the constraint often existing in conventional neural designs, whose closed-loop stability analysis always necessitates that neural networks (NNs) be confined in the active regions, a smooth switching function is presented to conquer this issue. By integrating minimal learning parameter (MLP) technique, prescribed performance control, and a kind of smooth switching strategy into back-stepping design, a new composite switching adaptive neural prescribed performance control scheme is proposed and a new type of adaptive laws is constructed for the altitude subsystem. Compared with previous neural control scheme for flight vehicle, the remarkable feature is that the proposed controller not only achieves the prescribed performance including transient and steady property but also addresses the constraint on NN. Two comparative simulations are presented to verify the effectiveness of the proposed controller.

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