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Relevant bibliographies by topics / Surface constraints

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Academic literature on the topic 'Surface constraints'

Author: Grafiati

Published: 4 June 2021

Last updated: 11 February 2022

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Journal articles on the topic "Surface constraints"

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Mrzygłód, M. "Multi-constrained topology optimization using constant criterion surface algorithm." Bulletin of the Polish Academy of Sciences: Technical Sciences 60, no. 2 (2012): 229–36. http://dx.doi.org/10.2478/v10175-012-0030-9.

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Abstract. This paper sets out to describe a multi-constrained approach to topology optimization of structures. In the optimization, a constant criterion surface algorithm and the multi-constraint procedure is used. The multi-constraint procedure consists of constraints normalization and equivalent design space assembling. The work is illustrated by an example of the L-shaped domain optimization with the horizontal line support and complex loads. The example takes into consideration stress, fatigue and compliance constraints. The separate and simultaneous application of constraints resulted in

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McCarthy, John J. "A Case of Surface Constraint Violation." Canadian Journal of Linguistics/Revue canadienne de linguistique 38, no. 2 (1993): 169–95. http://dx.doi.org/10.1017/s0008413100014730.

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The idea that constraints on well-formedness play a role in determining phonological alternations, which dates back at least to Kisseberth’s (1970) pioneering work, has by now achieved almost universal acceptance. A tacit assumption of this program, largely unquestioned even in recent research, is the notion that valid constraints must state true generalizations about surface structure or some other level of phonological representation. Anything different would seem antithetical to the very idea of a well-formedness constraint.

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Armesto, Leopoldo, João Moura, Vladimir Ivan, Mustafa Suphi Erden, Antonio Sala, and Sethu Vijayakumar. "Constraint-aware learning of policies by demonstration." International Journal of Robotics Research 37, no. 13-14 (2018): 1673–89. http://dx.doi.org/10.1177/0278364918784354.

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Many practical tasks in robotic systems, such as cleaning windows, writing, or grasping, are inherently constrained. Learning policies subject to constraints is a challenging problem. In this paper, we propose a method of constraint-aware learning that solves the policy learning problem using redundant robots that execute a policy that is acting in the null space of a constraint. In particular, we are interested in generalizing learned null-space policies across constraints that were not known during the training. We split the combined problem of learning constraints and policies into two: fir

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Xu, Ying, Ajay Joneja, and Kai Tang. "Surface Deformation under Area Constraints." Computer-Aided Design and Applications 6, no. 5 (2009): 711–19. http://dx.doi.org/10.3722/cadaps.2009.711-719.

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Zhong, Ming, and Hong Qin. "Surface inpainting with sparsity constraints." Computer Aided Geometric Design 41 (January 2016): 23–35. http://dx.doi.org/10.1016/j.cagd.2015.10.003.

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Scobbie, James M. "Constraint Violation and Conflict from the Perspective of Declarative Phonology." Canadian Journal of Linguistics/Revue canadienne de linguistique 38, no. 2 (1993): 155–67. http://dx.doi.org/10.1017/s0008413100014729.

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In phonology, constraints are finally coming into their own. There is no real consensus, however, about how constraints behave, and specifically how they interact with other aspects of the phonology and with each other. Theories of Declarative Phonology (DP) approach this “Interaction Problem” (Scobbie 1991a) in a radical way. In DP everything is a constraint — generalizations and lexical entries alike constrain the form of the intended phonological representation (“surface structure”). Moreover, constraints are mutually compatible, indefeasible and are declared non-procedurally. Declarative P

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Guy, Gregory R. "Violable is variable: Optimality theory and linguistic variation." Language Variation and Change 9, no. 3 (1997): 333–47. http://dx.doi.org/10.1017/s0954394500001952.

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ABSTRACTOptimality theory (OT) (McCarthy & Prince, 1993; Prince & Smolensky, 1993) has been proposed as a constraint-based theory of phonology in which the phonological facts of each language are accounted for by a language-specific ordering of a universal inventory of constraints. The constraints, expressing desirable (i.e., optimal) phonological states, evaluate possible candidate forms, selecting the optimal output. Any constraint may be violated by a surface form if it is overridden by a higherranked constraint; the ordinal sequence of constraints provides a weak quantification of

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Lidström, P. "Kinematics for unilateral constraints in multibody dynamics." Mathematics and Mechanics of Solids 22, no. 8 (2016): 1654–87. http://dx.doi.org/10.1177/1081286516642270.

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This paper is concerned with the kinematics of unilateral constraints in multibody dynamics. These constraints are related to the contact between parts and the principle of impenetrability of matter and have the property that they may be active, in which case they give rise to constraint forces, or passive, in which case they do not give rise to constraint forces. In order to check whether the constraint is active or passive a distance function between parts of the multibody is required. The paper gives a rigorous definition of the distance function and derives certain of its properties. The u

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Chmielus, Markus, and Peter Müllner. "Effects of Surface Pinning, Locking and Adaption of Twins on the Performance of Magnetic Shape-Memory Alloys." Materials Science Forum 684 (May 2011): 177–201. http://dx.doi.org/10.4028/www.scientific.net/msf.684.177.

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We study the effect of surface modifications and constraints on the mechanical properties of Ni-Mn- Ga single crystals, which are imposed by (i) structural modifications near the surface, (ii) mounting to a solid surface, and (iii) guiding the stroke. Spark eroded samples were electropolished and characterized before and after each polishing treatment. Surface damage was then produced with spark erosion and abrasive wearing. Surface damage stabilizes and pins a dense twin-microstructure and prevents twins from coarsening. The density of twins increases with increasing degree of surface deforma

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Tohka, Jussi. "GLOBAL DEFORMABLE SURFACE OPTIMIZATION USING ADAPTIVE CONSTRAINTS AND PENALTIES." Image Analysis & Stereology 24, no. 1 (2011): 9. http://dx.doi.org/10.5566/ias.v24.p9-19.

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Deformable models are able to solve surface extraction problems challenged by image noise because imageindependent constraints are used to regularize the shape of the extracted surface. However, this ability of deformable models is shadowed by their application specificity, initialization sensitivity and the difficulty of the selection of proper values for user definable parameters. To overcome these problems restricting the automation of surface extraction, we present a new algorithm, named AdaCoP, for the global minimization of the energy of deformable surfaces. It iteratively performs const

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Dissertations / Theses on the topic "Surface constraints"

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Ackert, Robert P. 1956. "Antarctic glacial chronology : new constraints from surface exposure dating." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/57670.

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Thesis (Ph.D.)--Joint Program in Oceanography (Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences and the Woods Hole Oceanographic Institution), 2000.<br>Vita.<br>Includes bibliographical references.<br>by Robert P. Ackert, Jr.<br>Ph.D.

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Cross, G. M. T. "Surface reconstruction from imaging sequences : texture of apparent contour constraints." Thesis, University of Oxford, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.365686.

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Lagarde, Jean W. (Jean Wilfrid). "Constraints and their satisfaction in the recovery of local surface structure." Thesis, McGill University, 1990. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=59897.

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This thesis deals with the problem of recovering the local structure of surfaces from discrete range data. It is assumed that this recovery is done mostly in a bottom-up fashion, that is, without the help of a priori knowledge about the viewed surface.<br>Because the problem is ill-posed, we nevertheless need to place constraints on the recovered structure to get a unique solution. In a bottom-up approach, these constraints must come from generic assumptions that apply to all surfaces.<br>Many methods of bottom-up surface reconstruction have been proposed up to now, some of them dealing with i

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Zhang, Cheng. "Nonrigid image registration using uncertain surface constraints with application to radiation therapy." Diss., University of Iowa, 2013. https://ir.uiowa.edu/etd/2029.

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An important research problem in image-guided adaptive radiation therapy (IGART) is how to accurately deform daily onboard cone-beam CT (CBCT) images to higher quality pretreatment magnetic resonance (MR) or fan-beam CT (FBCT) images, enabling cumulative dose to be evaluated and tumor response to be tracked. Particularly, in the case of IGART for prostate cancer, the question becomes to accurately register the critical organs, such as bladder, prostate and rectum. All are soft tissue and their boundaries can not always be identified using CBCT. As such it is challenging to register these soft

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Radosevich, Mark. "Sorptive constraints on the biodegradation of atrazine in surface and subsurface environments /." The Ohio State University, 1994. http://rave.ohiolink.edu/etdc/view?acc_num=osu148784937729592.

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Canale, Aneth S. "Adapting the EMPIRIC Approach to Investigate Evolutionary Constraints in Influenza A Virus Surface Proteins." eScholarship@UMMS, 2017. https://escholarship.umassmed.edu/gsbs_diss/948.

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Controlling influenza A virus (IAV) infections remains a challenge largely due to the high replication and mutation rates of the virus. IAV is a negative-sense RNA virus with two main surface proteins — hemagglutinin (HA) and neuraminidase (NA). HA recognizes and binds sialic acid on host cell receptors to initiate virus entry. NA also recognizes sialic acid on host cell receptors but functions by cleaving sialic acid interactions to release progeny virus. Because both HA and NA interact with sialic acid on the host cell surface with opposing effects, their balance is essential for optimal vir

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van, Heijst Hendrik Jan. "New constraints on the seismic structure of the earth from surface wave overtone phase velocity measurements." Thesis, University of Oxford, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.242041.

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RODRIGUES, LÍVIA FERREIRA. "EVALUATION OF PROBABILISTIC CONSTRAINTS FOR RISK AVERSION SURFACE IN MEDIUM - TERM PLANNING PROBLEM OF HYDROTHERMAL OPERATION." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2016. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=28062@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO<br>COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR<br>PROGRAMA DE EXCELENCIA ACADEMICA<br>Este trabalho propõe a inclusão de restrições probabilísticas como alternativa para inclusão de aversão ao risco no problema de planejamento de longo prazo da geração em sistemas hidrotérmicos, resolvido por programação dinâmica dual estocástica (PDDE). Propõe-se uma abordagem menos restritiva em comparação com métodos alternativos de aversão a risco já avaliados no sistema brasileiro, como a curva de aversão ao risco (CAR) ou a superfície de

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Kurtdere, Ahmet Gokhan. "Efficient Solution Of Optimization Problems With Constraints And/or Cost Functions Expensive To Evaluate." Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12611342/index.pdf.

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There are many optimization problems motivated by engineering applications, whose constraints and/or cost functions are computationally expensive to evaluate. What is more derivative information is usually not available or available at a considerable cost. For that reason, classical optimization methods, based on derivatives, are not applicable. This study presents a framework based on available methods in literature to overcome this important problem. First, a penalized model is constructed where the violation of the constraints are added to the cost function. The model is optimized with help

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Emery, Joshua P. "Constraints on the surface composition of Trojan asteroidsfrom near infrared (0.8-4.0 μm) spectroscopy and spectral modeling". Diss., The University of Arizona, 2002. http://hdl.handle.net/10150/280170.

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The present surface composition of primitive objects provides clues to understanding the conditions under which the solar system formed. Characterization of the inner solar nebula progresses rapidly due to remote studies of asteroid and planetary surfaces as well as laboratory analyses of meteorites and lunar samples. Because of their atypical orbital position at 5.2 AU, the Trojan asteroids hold the potential to help resolve several problems in planetary science, including conditions in the early solar nebula. The study presented herein was undertaken in order to uncover the nature of these p

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Books on the topic "Surface constraints"

1

Ackert, Robert P. Antarctic glacial chronology: New constraints from surface exposure dating. Massachusetts Institute of Technology, 2000.

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Shen, Y. L. Constrained Deformation of Materials: Devices, Heterogeneous Structures and Thermo-Mechanical Modeling. Springer Science+Business Media, LLC, 2010.

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Fan, John L. Constrained Coding and Soft Iterative Decoding. Springer US, 2001.

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United States. National Aeronautics and Space Administration. Scientific and Technical Information Division., ed. Lighting constraints on lunar surface operations. National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Division, 1991.

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Near-infrared spectral geometric albedos of Charon and Pluto: Constraints on Charon's surface composition. National Aeronautics and Space Administration, 1996.

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Near-infrared spectral geometric albedos of Charon and Pluto: Constraints on Charon's surface composition. National Aeronautics and Space Administration, 1996.

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Near-infrared spectral geometric albedos of Charon and Pluto: Constraints on Charon's surface composition. National Aeronautics and Space Administration, 1996.

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Clark, Sean. Task and support surface constraints on the coordination and control of posture in older adults. 1998.

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Mann, Peter. Constrained Lagrangian Mechanics. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198822370.003.0008.

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This chapter builds on the previous two chapters to tackle constrained systems, using Lagrangian mechanics and constrained variations. The first section deals with holonomic constraint equations using Lagrange multipliers; these can be used to reduce the number of coordinates until a linearly independent minimal set is obtained that describes a constraint surface within configuration space, so that Lagrange equations can be set up and solved. Motion is understood to be confined to a constraint submanifold. The variational formulation of non-holonomic constraints is then discussed to derive the

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Mann, Peter. Liouville’s Theorem & Classical Statistical Mechanics. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198822370.003.0020.

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This chapter returns to the discussion of constrained Hamiltonian dynamics, now in the canonical setting, including topics such as regular Lagrangians, constraint surfaces, Hessian conditions and the constrained action principle. The standard approach to Hamiltonian mechanics is to treat all the variables as being independent; in the constrained case, a constraint function links the variables so they are no longer independent. In this chapter, the Dirac–Bergmann theory for singular Lagrangians is developed, using an action-based approach. The chapter then investigates consistency conditions an

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Book chapters on the topic "Surface constraints"

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Tran, Son, and Larry Davis. "3D Surface Reconstruction Using Graph Cuts with Surface Constraints." In Computer Vision – ECCV 2006. Springer Berlin Heidelberg, 2006. http://dx.doi.org/10.1007/11744047_17.

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Selvadurai, A. P. S., and M. C. Au. "Plane Cracks with Non-Linear Surface Constraints." In Computational Mechanics ’88. Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/978-3-642-61381-4_22.

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Campins, Humberto, and Yanga Fernández. "Observational Constraints on Surface Characteristics of Comet Nuclei." In Cometary Science after Hale-Bopp. Springer Netherlands, 2002. http://dx.doi.org/10.1007/978-94-017-1086-2_6.

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Lattimer, James M. "Equation of state constraints from neutron stars." In Isolated Neutron Stars: From the Surface to the Interior. Springer Netherlands, 2007. http://dx.doi.org/10.1007/978-1-4020-5998-8_46.

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MacDonald, David, David Avis, and Alan C. Evans. "Proximity constraints in deformable models for cortical surface identification." In Medical Image Computing and Computer-Assisted Intervention — MICCAI’98. Springer Berlin Heidelberg, 1998. http://dx.doi.org/10.1007/bfb0056251.

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Mo, Kun, and Zhouping Yin. "Surface Reconstruction of Engine Intake Ports with Mixed Constraints." In Intelligent Robotics and Applications. Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-10817-4_90.

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He, Qiang, and Chee-hung Henry Chu. "Planar Surface Detection in Image Pairs Using Homographic Constraints." In Advances in Visual Computing. Springer Berlin Heidelberg, 2006. http://dx.doi.org/10.1007/11919476_3.

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Trampedach, Regner, Jørgen Christensen-Dalsgaard, Åke Nordlund, and Robert F. Stein. "Near-Surface Constraints on the Structure of Stellar Convection Zones." In SCORe ’96: Solar Convection and Oscillations and their Relationship. Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-011-5167-2_8.

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Solem, Jan Erik, and Niels Chr Overgaard. "A Gradient Descent Procedure for Variational Dynamic Surface Problems with Constraints." In Lecture Notes in Computer Science. Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/11567646_28.

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Alexias, Pavlos P., and Eugene de Villiers. "Gradient Projection, Constraints and Surface Regularization Methods in Adjoint Shape Optimization." In Computational Methods in Applied Sciences. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-89890-2_1.

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Conference papers on the topic "Surface constraints"

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Rajan, Venkat N., Kevin W. Lyons, and Raj Sreerangam. "Generation of Component Degrees of Freedom From Assembly Surface Mating Constraints." In ASME 1997 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/detc97/dtm-3894.

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Abstract Most products are assemblies of components. The number of components can range from a few tens to a few millions. Assembly design involves the specification of component locations and orientations and the types of joints between them to achieve certain functional requirements. Current approaches to assembly modeling provide the designer the ability to specify high-level mating constraints between components which are then used to generate their locations and orientations. However, this provides little information about what types of joints have been created which have direct relevance

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Salvi, Péter, and Tamás Várady. "Hierarchical surface fairing with constraints." In the 14th ACM Symposium. ACM Press, 2010. http://dx.doi.org/10.1145/1839778.1839809.

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Oliver, James H., and Philip C. Theruvakattil. "Sculptured Surface Model Synthesis Based on Functional Design Constraints." In ASME 1993 Design Technical Conferences. American Society of Mechanical Engineers, 1993. http://dx.doi.org/10.1115/detc1993-0426.

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Abstract A technique is presented for the synthesis of sculptured surface models subject to several functional design constraints. A design environment is specified as a collection of polyhedral models which represent components in the vicinity of the design surface, or regions which the surface should avoid. The primary functional constraint is formulated as a proximity penalty function such that the design surface is induced to avoid a tolerance envelope around each component. In addition, a constraint based on surface area is formulated to counteract the expansion effect of the proximity co

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Yin, Jinxiang, and Guanlong Chen. "A Novel Approach to Preserving Geometric Constraints in Curve/Surface MRA Modeling." In ASME 2004 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/detc2004-57736.

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MRA editing destroys the geometric constraints of curves/surfaces, a high efficient algorithm called wavelet signal separation to preserve geometric constraints during wavelet transformation in MRA modeling is proposed in this paper. The algorithm divides the B-spline control points into those associated and those unassociated with the geometric constraints. Through preserving the signal information associated with the constraint control points, the geometric constraints can be directly preserved after wavelet transformation. The detailed mathematics for this approach is presented. Different e

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Fisher, R. B. "Geometic Constraints from Planar Surface Patch Matching." In Alvey Vision Conference 1989. Alvey Vision Club, 1989. http://dx.doi.org/10.5244/c.3.10.

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Jiping Lu and J. Little. "Geometric and photometric constraints for surface recovery." In Proceedings of IEEE Conference on Computer Vision and Pattern Recognition. IEEE, 1996. http://dx.doi.org/10.1109/cvpr.1996.517148.

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Li, Suyun, Jie Tang, and Gangshan Wu. "Geologic Surface Reconstruction Based on Fault Constraints." In Second Workshop on Digital Media and its Application in Museum & Heritage (DMAMH 2007). IEEE, 2007. http://dx.doi.org/10.1109/dmamh.2007.4414546.

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Li, Suyun, Jie Tang, and Gangshan Wu. "Geologic Surface Reconstruction Based on Fault Constraints." In Second Workshop on Digital Media and its Application in Museum & Heritages (DMAMH 2007). IEEE, 2007. http://dx.doi.org/10.1109/dmamh.2007.58.

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Farenzena, M., and A. Fusiello. "3D surface models by geometric constraints propagation." In 2008 IEEE Conference on Computer Vision and Pattern Recognition (CVPR). IEEE, 2008. http://dx.doi.org/10.1109/cvpr.2008.4587776.

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Cercato, M. "Linearized Inversion of MASW Data Using Inequality Constraints." In Near Surface 2007 - 13th EAGE European Meeting of Environmental and Engineering Geophysics. European Association of Geoscientists & Engineers, 2007. http://dx.doi.org/10.3997/2214-4609.20146596.

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Reports on the topic "Surface constraints"

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Fernandes, R. Surface albedo feedback - observational constraints on climate models. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2012. http://dx.doi.org/10.4095/290188.

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Theiler, J., and B. G. Henderson. A geometrical constraint on shadowing in rough surfaces. Office of Scientific and Technical Information (OSTI), 1997. http://dx.doi.org/10.2172/532451.

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Farmer, Delphine. Final Report: Observational constraints on wet and dry deposition of black carbon to land surfaces. Office of Scientific and Technical Information (OSTI), 2021. http://dx.doi.org/10.2172/1761202.

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Thomas, Douglas, and Mellon Michael. Sublimation of terrestrial permafrost and the implications for ice-loss processes on Mars. Engineer Research and Development Center (U.S.), 2021. http://dx.doi.org/10.21079/11681/41244.

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Sublimation of ice is rate-controlled by vapor transport away from its outer surface and may have generated landforms on Mars. In ice-cemented ground (permafrost), the lag of soil particles remaining after ice loss decreases subsequent sublimation. Varying soil-ice ratios lead to differential lag development. Here we report 52 years of sublimation measurements from a permafrost tunnel near Fairbanks, Alaska, and constrain models of sublimation, diffusion through porous soil, and lag formation. We derive the first long-term in situ effective diffusion coefficient of ice-free loess, a Mars analo

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Yan, Yujie, and Jerome F. Hajjar. Automated Damage Assessment and Structural Modeling of Bridges with Visual Sensing Technology. Northeastern University, 2021. http://dx.doi.org/10.17760/d20410114.

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Recent advances in visual sensing technology have gained much attention in the field of bridge inspection and management. Coupled with advanced robotic systems, state-of-the-art visual sensors can be used to obtain accurate documentation of bridges without the need for any special equipment or traffic closure. The captured visual sensor data can be post-processed to gather meaningful information for the bridge structures and hence to support bridge inspection and management. However, state-of-the-practice data postprocessing approaches require substantial manual operations, which can be time-c

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Phelps, G. A., and E. H. McKee. High-angle faults in the basement of Yucca Flat, Nevada Test Site, Nevada, based on analysis of a constrained gravity inversion surface. Office of Scientific and Technical Information (OSTI), 2000. http://dx.doi.org/10.2172/755319.

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Karlstrom, Karl, Laura Crossey, Allyson Matthis, and Carl Bowman. Telling time at Grand Canyon National Park: 2020 update. National Park Service, 2021. http://dx.doi.org/10.36967/nrr-2285173.

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Grand Canyon National Park is all about time and timescales. Time is the currency of our daily life, of history, and of biological evolution. Grand Canyon’s beauty has inspired explorers, artists, and poets. Behind it all, Grand Canyon’s geology and sense of timelessness are among its most prominent and important resources. Grand Canyon has an exceptionally complete and well-exposed rock record of Earth’s history. It is an ideal place to gain a sense of geologic (or deep) time. A visit to the South or North rims, a hike into the canyon of any length, or a trip through the 277-mile (446-km) len

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