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Relevant bibliographies by topics / Heterogeneous CAD

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Academic literature on the topic 'Heterogeneous CAD'

Author: Grafiati

Published: 4 June 2021

Last updated: 16 February 2022

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Journal articles on the topic "Heterogeneous CAD"

1

Wu, Xiao J., Wei J. Liu, and Michael Y. Wang. "Modeling Heterogeneous Objects in CAD." Computer-Aided Design and Applications 4, no. 6 (January 2007): 731–40. http://dx.doi.org/10.1080/16864360.2007.10738506.

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Baptistella, Antuani R., Marcos Vinicios Salles Dias, Samuel Aguiar, Maria D. Begnami, and Vilma R. Martins. "Heterogeneous expression of A33 in colorectal cancer." Anti-Cancer Drugs 27, no. 8 (September 2016): 734–37. http://dx.doi.org/10.1097/cad.0000000000000379.

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Siu, Y. K., and S. T. Tan. "Representation and CAD modeling of heterogeneous objects." Rapid Prototyping Journal 8, no. 2 (May 2002): 70–75. http://dx.doi.org/10.1108/13552540210420934.

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Tandon, Puneet, and Anuj Kant. "A CAD system for heterogeneous solid modelling." International Journal of Computer Applications in Technology 24, no. 4 (2005): 226. http://dx.doi.org/10.1504/ijcat.2005.008269.

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Kou, X. Y., and S. T. Tan. "Representation and Visualization for Heterogeneous CAD models." Computer-Aided Design and Applications 1, no. 1-4 (January 2004): 163–70. http://dx.doi.org/10.1080/16864360.2004.10738255.

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Wu, Xiaojun, Weijun Liu, and Michael Yu Wang. "A CAD modeling system for heterogeneous object." Advances in Engineering Software 39, no. 5 (May 2008): 444–53. http://dx.doi.org/10.1016/j.advengsoft.2007.03.002.

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Wu, Xiaojun. "HETEROGENEOUS MATERIAL OBJECT MODELING FOR 3D CAD PART." Chinese Journal of Mechanical Engineering 40, no. 05 (2004): 111. http://dx.doi.org/10.3901/jme.2004.05.111.

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Sun, Li-juan, and Bo Ding. "Ontology-based Semantic Interoperability among Heterogeneous CAD Systems." Information Technology Journal 9, no. 8 (November 1, 2010): 1635–40. http://dx.doi.org/10.3923/itj.2010.1635.1640.

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Yuan, B., Wei Xiong, and Zu Wen Wang. "Data Transfer from Heterogeneous CAD to Division Mockup Virtual Prototype." Applied Mechanics and Materials 10-12 (December 2007): 456–59. http://dx.doi.org/10.4028/www.scientific.net/amm.10-12.456.

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Virtual prototype technology could integrate different CAD formats parts into an digital model. In this way the design process will be more efficient. This issue reviewed three methods to transfer data from CAD parts to virtual reality element. And find an efficient way to transfer different CAD model data to virtual prototype software Division MockUp.

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Bhashyam, Srinivas, Ki Hoon Shin, and Debashish Dutta. "An integrated CAD system for design of heterogeneous objects." Rapid Prototyping Journal 6, no. 2 (June 2000): 119–35. http://dx.doi.org/10.1108/13552540010323547.

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Dissertations / Theses on the topic "Heterogeneous CAD"

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Siu, Yan-kit, and 邵仁傑. "Modelling and prototyping of heterogeneous solid CAD models." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2003. http://hub.hku.hk/bib/B31245924.

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Liteplo, William P. (William Paul) 1976. "Virtual assembly models in distributed heterogeneous CAD environments." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/89328.

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Yu, Kristie 1976. "Development of heterogeneous CAD assembly tools for collaborative design." Thesis, Massachusetts Institute of Technology, 2002. http://hdl.handle.net/1721.1/89900.

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Bowman, Kelly Eric. "Neutral Parametric Database, Server, Logic Layers, and Clients to Facilitate Multi-EngineerSynchronous Heterogeneous CAD." BYU ScholarsArchive, 2016. https://scholarsarchive.byu.edu/etd/5656.

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Engineering companies are sociotechnical systems in which engineers, designers, analysts, etc. use an array of software tools to follow prescribed product-development processes. The purpose of these amalgamated systems is to develop new products as quickly as possible while maintaining quality and meeting customer and market demands. Researchers at Brigham Young University have shortened engineering design cycle times through the development and use of multiengineer synchronous (MES) CAD tools. Other research teams have shortened design cycle-times by extending seamless interoperability across heterogeneous design tools and domains. Seamless multi-engineer synchronous heterogeneous (MESH) CAD environments is the focus of this dissertation. An architecture that supports both MES collaboration and interoperability is defined, tested for robustness, and proposed as the start of a new standard for interoperability. An N-tiered architecture with four layers is used. These layers are data storage, server communication, business logic, and client. Perhaps the most critical part of the architecture is the new neutral parametric database (NPDB) standard which can generically store associative CAD geometry from heterogeneous CAD systems. A practical application has been developed using the architecture which demonstrates design and modeling interoperability between Siemens NX, PTC's Creo, and Dassault Systemes CATIA CAD applications; Interoperability between Siemens' NX and Dassault Systemes' CATIA are specifically outlined in this dissertation. The 2D point, 2D line, 2D arc, 2D circle, 2D spline, 3D point, extrude, and revolve features have been developed. Complex models have successfully been modeled and exchanged in real time across heterogeneous CAD clients and have validated this approach for MESH CAD collaboration.

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Okuya, Yujiro. "CAD Modification Techniques for Design Reviews on Heterogeneous Interactive Systems." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLS450.

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Les revues de design industriel bénéficient des nouvelles technologies interactives pour devenir plus réalistes, immersives et collaboratives. Toutefois, la modification des données de conception (CAO) est toujours effectuées depuis un espace de travail traditionnel par des ingénieurs qualifiés. Des problèmes de communication entre les différents experts peuvent apparaitre lors des réunions de revue de projet et engendrer des erreurs d’interprétation des modifications. J’estime que les processus actuels de révision de la conception impliquant itérativement des discussions sur la conception et un ajustement des modèles 3d devraient fusionner. Cela pourrait réduire le nombre d’itérations de correction sur les modèles durant le cycle de développement en facilitant lesdiscussions et en permettant à des utilisateurs non spécialistes CAO de modifier les données. Dans cette thèse, j’ai commencé par interviewer des ingénieurs de l‘industrie et j’ai esquissé un scénario de revue de conception dans lequel tous les membres d’un même projet peuvent générer et comparer plusieurs alternatives de conception depuis des systèmes interactifs adaptés pour répondre aux besoins de leurs différents expertises. J’ai d’abord conçu un système de couplage entre un environnement interactif temps réel et des données de CAO (RV-CAO) capable de modifier et de mettre à jour au format CAO natif. J’ai ensuite proposé des techniques d’interaction pour permettre à des utilisateurs non experts en CAO de modifier les données CAO paramétriques en utilisant des systèmes depuis un système CAVE et un mur d’image. Pour le système CAVE, j’ai créé ShapeGuide, une métaphore d’interaction basée forme permettant aux utilisateurs de générer et de choisir parmi des alternatives de conception en agissant indirectement sur les valeurs des paramètres d’un modèle CAO. J’ai étudié comment ShapeGuide peut affecter la qualité d’une tâche de modification de données CAO par rapport à un réglage de valeur de paramètre basée sur un défilement unidimensionnel. Les résultats ont montré que ShapeGuide permettait une modification plus rapide, plus efficace et préférée par les utilisateurs. Pour l’interaction depuis un mur d’images, j’ai créé ShapeCompare, qui permet à plusieurs utilisateurs de générer et de comparer plusieurs alternatives de design. J’ai étudié comment ShapeCompare affecte la collaboration entre experts par rapport à une technique de visualisation adaptée aux écrans standard. Les résultats ont montré qu’avec ShapeCompare, des paires de participants effectuaient plus rapidement une tâche de résolution de contraintes multiples et utilisaient plus d’instructions déictiques. Les résultats présentés décrivent des propositions de nouvelles pratiques de révision de conception, se basant sur l’utilisation d’interactions immersives et de murs d’images, qui permettent la modification directe des données de conception d’origine par tous les membres du projet quelle que soit leur expertise en CAO
Industrial design reviews benefit from emerging interactive technologies to become more Realistic, Immersive and Collaborative. However, the modification of design data is still managed in traditional workspace–Computer-Aided Design (CAD) systems on a workstation. As only engineers can apply modifications in such a workspace after the design review meeting, miscommunication between various experts could occur, resulting in unnecessary iterations. I argue that current processes of design reviews–design discussion and design adjustment– should merge. It could reduce the iterations, facilitate discussions and empower non-CAD experts to modify CAD data. In this dissertation, I started by interviewing engineers at an automotive industry and drew a new design review scenario in which project members can generate and compare several design alternatives in heterogeneous systems that can support needs from various experts. Based on the scenario, I firstly designed a VR-CAD system that can update the native format of CAD data in highly configurable interactive systems. I then explored interaction techniques for non-CAD experts to modify parametric CAD data with 3D and 2D interactive systems: a CAVE system and a wall-sized display. For the CAVE system, I created ShapeGuide, which allows users to generate and switch design alternatives of CAD data with a shape-based 3D interaction. I investigated how ShapeGuide affects a CAD data modification task compared to a standard one-dimensional scroll for parameter manipulation. Results showed that ShapeGuide was faster, more efficient and preferred by the users than the scroll technique. For the wall-sized display, I created ShapeCompare, which allows users to generate and distribute multiple design alternatives of CAD data using touch interaction. I investigated how ShapeCompare affects the collaboration among experts compared to a visualization technique suitable for standard screens. Results showed that pairs of participants performed a constraint solving task faster and used more deictic instructions with Shape- Compare. The presented findings for new design review practices using immersive systems and a wallsized display, allowing direct modification of the original CAD data by all project members regardless of their CAD expertise

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Shumway, Devin James. "Hybrid State-Transactional Database for Product Lifecycle Management Features in Multi-Engineer Synchronous Heterogeneous Computer-Aided Design." BYU ScholarsArchive, 2017. https://scholarsarchive.byu.edu/etd/6341.

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There are many different programs that can perform Computer Aided Design (CAD). In order for these programs to share data, file translations need to occur. These translations have typically been done by IGES and STEP files. With the work done at the BYU CAD Lab to create a multi-engineer synchronous heterogeneous CAD environment, these translation processes have become synchronous by using a server and a database to manage the data. However, this system stores part data in a database. The data in the database cannot be used in traditional Product Lifecycle Management systems. In order to remedy this, a new database was developed that enables every edit made in a CAD part across multiple CAD systems to be stored as well as worked on simultaneously. This allows users to access every action performed in a part. Branching was introduced to the database which allows users to work on multiple configurations of a part simultaneously and reduces file save sizes for different configurations by 98.6% compared to those created by traditional CAD systems.

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Staves, Daniel Robert. "Associative CAD References in the Neutral Parametric Canonical Form." BYU ScholarsArchive, 2016. https://scholarsarchive.byu.edu/etd/6222.

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Due to the multiplicity of computer-aided engineering applications present in industry today, interoperability between programs has become increasingly important. A survey conducted among top engineering companies found that 82% of respondents reported using 3 or more CAD formats during the design process. A 1999 study by the National Institute for Standards and Technology (NIST) estimated that inadequate interoperability between the OEM and its suppliers cost the US automotive industry over $1 billion per year, with the majority spent fixing data after translations. The Neutral Parametric Canonical Form (NPCF) prototype standard developed by the NSF Center for e-Design, BYU Site offers a solution to the translation problem by storing feature data in a CAD-neutral format to offer higher-fidelity parametric transfer between CAD systems. This research has focused on expanding the definitions of the NPCF to enforce data integrity and to support associativity between features to preserved design intent through the neutralization process. The NPCF data structure schema was defined to support associativity while maintaining data integrity. Neutral definitions of new features was added including multiple types of coordinate systems, planes and axes. Previously defined neutral features were expanded to support new functionality and the software architecture was redefined to support new CAD systems. Complex models have successfully been created and exchanged by multiple people in real-time to validated the approach of preserving associativity and support for a new CAD system, PTC Creo, was added.

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Freeman, Robert Steven. "Neutral Parametric Canonical Form for 2D and 3D Wireframe CAD Geometry." BYU ScholarsArchive, 2015. https://scholarsarchive.byu.edu/etd/5688.

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The challenge of interoperability is to retain model integrity when different software applications exchange and interpret model data. Transferring CAD data between heterogeneous CAD systems is a challenge because of differences in feature representation. A study by the National Institute for Standards and Technology (NIST) performed in 1999 made a conservative estimate that inadequate interoperability in the automotive industry costs them $1 billion per year. One critical part of eliminating the high costs due to poor interoperability is a neutral format between heterogeneous CAD systems. An effective neutral CAD format should include a current-state data store, be associative, include the union of CAD features across an arbitrary number of CAD systems, maintain design history, maintain referential integrity, and support multi-user collaboration. This research has focused on extending an existing synchronous collaborative CAD software tool to allow for a neutral, current-state data store. This has been accomplished by creating a Neutral Parametric Canonical Form (NPCF) which defines the neutral data structure for many basic CAD features to enable translation between heterogeneous CAD systems. The initial architecture developed begins to define a new standard for storing CAD features neutrally. The NPCF's for many features have been implemented in a multi-user interoperability program and work between NX and CATIA CAD systems. The 2D point, 2D line, 2D arc, 2D circle, 2D spline, 3D point, extrude, and revolve NPCF's will be specifically defined. Complex models have successfully been modeled and exchanged in real time and have validated the NPCF approach. Multiple users can be in the same part at the same time in different CAD systems and create and update models in real time.

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George, Suma. "Can my chip behave like my brain?" Diss., Georgia Institute of Technology, 2015. http://hdl.handle.net/1853/54905.

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Many decades ago, Carver Mead established the foundations of neuromorphic systems. Neuromorphic systems are analog circuits that emulate biology. These circuits utilize subthreshold dynamics of CMOS transistors to mimic the behavior of neurons. The objective is to not only simulate the human brain, but also to build useful applications using these bio-inspired circuits for ultra low power speech processing, image processing, and robotics. This can be achieved using reconfigurable hardware, like field programmable analog arrays (FPAAs), which enable configuring different applications on a cross platform system. As digital systems saturate in terms of power efficiency, this alternate approach has the potential to improve computational efficiency by approximately eight orders of magnitude. These systems, which include analog, digital, and neuromorphic elements combine to result in a very powerful reconfigurable processing machine.

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Nawrath, Thomas. "P2P-based Mobility Management for Heterogeneous Wireless Networks and Mesh Networks." Universitätsbibliothek Chemnitz, 2006. http://nbn-resolving.de/urn:nbn:de:swb:ch1-200601065.

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Today Moblity Management is one of the most important tasks that need to be accomplished to secure availability and performance of communication between people. This paper explains how moblity management is currently structured and what algorithms and approaches from Peer-To-Peer technology could be used to increase availability and performance.

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Books on the topic "Heterogeneous CAD"

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Uchiyama, Kunio. Heterogeneous Multicore Processor Technologies for Embedded Systems. New York, NY: Springer New York, 2012.

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Varra, Lucia, ed. Dal dato diffuso alla conoscenza condivisa. Florence: Firenze University Press, 2012. http://dx.doi.org/10.36253/978-88-6655-177-5.

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At the present time, the tourist destination offers a stimulating laboratory for the experimentation of theoretical models and good practices on the subjects of governance, knowledge management and sustainable competition. Growing interest in the study of this territorial context gains impetus from the new approaches and tools that local administrations are starting to introduce in the phases of implementation and control of local strategies. In this respect, the Tourist Destination Observatory (OTD) represents an important innovation, offering a nerve centre for the aggregation and networking of heterogeneous data scattered over the territory as well as a model for the implementation of permanent approaches to social dialogue as prerequisites for the creation of knowledge and for an aware, shared, competitive and responsible development of the destination. The OTD can act as an efficient agent of local change, facilitating the processes of governance, and as a tool of knowledge management for the valorisation of intellectual capital. It is consequently a crucial support for the strategic repositioning of mountain resorts, which can represent valid responses to the emerging new modes of interpreting the holiday.

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Arakawa, Fumio, Kunio Uchiyama, and Hironori Kasahara. Heterogeneous Multicore Processor Technologies for Embedded Systems. Springer, 2012.

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Back, Kerry E. Heterogeneous Beliefs. Oxford University Press, 2017. http://dx.doi.org/10.1093/acprof:oso/9780190241148.003.0021.

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There is a representative investor in a complete single‐period market if all investors have log utility or if all investors have CARA utility, even if investors have different beliefs. This extends to dynamic markets for log utility but not for CARA utility. With CARA and other LRT utility, the concept of a representative investor can be extended to include a random discounting factor that is either a supermartingale or a submartingale. If there are short sales constraints, then assets may be overpriced relative to average beliefs, because pessimistic investors are constrained from trading on their beliefs. The overpricing is an increasing function of the dispersion of beliefs. In a dynamic market with short sales constraints, prices can exceed even the values of optimistic investors (a speculative bubble).

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Alaniz, Enrique, T. H. Gindling, Catherine Mata, and Diego Rojas. Heterogeneous informality in Costa Rica and Nicaragua. 50th ed. UNU-WIDER, 2021. http://dx.doi.org/10.35188/unu-wider/2021/988-4.

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Informal work is often considered a place of employment for marginalized and vulnerable workers who have been rationed out of preferred formal work. However, informality can also be seen as a dynamic sector that budding entrepreneurs and those looking for flexible working conditions enter voluntarily. We use the methodology developed in Günther and Launov (2012) to test for the voluntary and involuntary nature of informal work in Nicaragua and Costa Rica, without making ad hoc assumptions about labour market segmentation and self-selection. We find evidence of heterogeneous informality in both Nicaragua and Costa Rica, with one informal sub-segment where most workers are voluntarily informal and another informal sub-segment where most workers are involuntarily informal. In Nicaragua, our results suggest that 44 per cent of wage employees are involuntarily informal, while 30 per cent of self-employed workers are involuntarily informal. In Costa Rica, our results suggest that 10 per cent of wage employees are involuntarily informal, and that 66 per cent of the self-employed are involuntarily informal.

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Mary, Latisha, Ann-Birte Krüger, and Andrea S. Young, eds. Migration, Multilingualism and Education. Multilingual Matters, 2021. http://dx.doi.org/10.21832/mary2941.

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This book addresses the question of how equitable and inclusive education can be implemented in heterogeneous classes where learners’ languages and cultures reflect the social reality of mass migration and everyday plurilingualism. The book brings together researchers and practitioners to address language policy and pedagogy.

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Winchester, Robert, Darren D. O’Rielly, and Proton Rahman. Genetics of psoriatic arthritis. Oxford University Press, 2018. http://dx.doi.org/10.1093/med/9780198737582.003.0006.

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The psoriatic phenotype is clinically heterogeneous with psoriatic arthritis (PsA) itself being heterogeneous. Studies have consistently demonstrated that PsA has a strong genetic component and disease pathogenesis encompasses a complex interplay between genetic, immunological, and environmental factors. In this chapter, we will review the genetics of PsA including the major histocompatibility complex (MHC) region and non-MHC loci. We will detail how susceptibility genes can be grouped into barrier integrity, innate immune response, and adaptive immune response (particularly Th-17 lymphocyte signalling). We will articulate how these studies strongly support PsA as genetically different from PsV and that the genetic heterogeneity is likely attributed to different HLA susceptibility alleles within the MHC region that an individual carries. Furthermore, we will highlight new emerging technologies, in particular, next-generation sequencing, which may lead to new genetic discoveries in PsA.

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Betteridge, D. John, ed. Epidemiology of cardiovascular disease: the scale of the problem. Oxford University Press, 2011. http://dx.doi.org/10.1093/med/9780199543502.003.0001.

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• The epidemic of cardiovascular disease (CVD) has been and still is very dynamic and heterogeneous when comparing time trends and mortality rates in different places of the world.• Age-standardized CVD mortality rates have declined in some countries, mainly due to a better management of the essential risk factors.• Unfavourable trends in CVD incidence are found and foreseen in developing countries due to demographic and to adverse lifestyle changes.• Comprehensive CVD prevention strategies are needed to promote primary prevention and better implementation of effective preventive actions in patients with established CVD.

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Rahman, Shamima, and Mirian C. H. Janssen. Disorders of Mitochondrial Energy Metabolism. Oxford University Press, 2016. http://dx.doi.org/10.1093/med/9780199972135.003.0007.

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Mitochondrial disease can be diagnosed at every age, and the clinical presentation is very heterogeneous. In rare cases only a single organ is affected, but multisystem involvement may develop with progression of the disease. Organ systems relying most on aerobic metabolism are preferentially affected, including the central nervous system, peripheral nerves, eye, skeletal and cardiac muscle, and endocrine organs. These disorders can be classified according to whether the causative mutations affect mitochondrial DNA or nuclear DNA. Since specific treatment options are still limited, the management of mitochondrial disorders is largely supportive.

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Chong, Ji Y., and Michael P. Lerario. Progressive Quadriplegia. Oxford University Press, 2016. http://dx.doi.org/10.1093/med/9780190495541.003.0005.

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Spinal cord ischemia most often presents as an anterior spinal artery syndrome and involves watershed regions of the spinal cord. The clinical presentation and etiologies can be heterogeneous, but cord infarcts are typically the result of aortic surgeries, systemic hypotension, vertebral artery and aortic dissections, embolus, or vascular malformations. Given that it is a rare entity, involving symptoms that can progress over minutes to hours, a diagnosis is often delayed until after conventional windows for revascularization, including thrombolysis, have passed. Magnetic resonance imaging (MRI) is usually required to confirm the diagnosis.

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Book chapters on the topic "Heterogeneous CAD"

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Krause, Frank-Lothar, Helmut Jansen, and Thomas Kiesewetter. "Cooperative Product Development with heterogeneous CAD systems via EDM and Broadband Communication Technique." In CAD Systems Development, 55–70. Berlin, Heidelberg: Springer Berlin Heidelberg, 1997. http://dx.doi.org/10.1007/978-3-642-60718-9_5.

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Chen, Xiang, Min Li, and Shuming Gao. "A Web Service for Exchanging Procedural CAD Models Between Heterogeneous CAD Systems." In Lecture Notes in Computer Science, 225–34. Berlin, Heidelberg: Springer Berlin Heidelberg, 2006. http://dx.doi.org/10.1007/11686699_23.

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Ota, Martin, and Ivan Jelínek. "Data Exchange in CAD During Iterative Work with Heterogeneous Systems." In Lecture Notes in Computer Science, 25–32. Berlin, Heidelberg: Springer Berlin Heidelberg, 2006. http://dx.doi.org/10.1007/11863649_4.

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Gravellier, Joseph, Jean-Max Dutertre, Yannick Teglia, Philippe Loubet Moundi, and Francis Olivier. "Remote Side-Channel Attacks on Heterogeneous SoC." In Smart Card Research and Advanced Applications, 109–25. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-42068-0_7.

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Noh, SungKee, YoungHa Hwang, KiIl Kim, and SangHa Kim. "Achieving Fair New Call CAC for Heterogeneous Services in Wireless Networks." In Computational Science and Its Applications – ICCSA 2004, 460–70. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-540-24768-5_49.

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Getmanskiy, Victor, Andrey E. Andreev, Sergey Alekseev, Alexander S. Gorobtsov, Vitaly Egunov, and Egor Kharkov. "Optimization and Parallelization of CAE Software Stress-Strain Solver for Heterogeneous Computing Hardware." In Communications in Computer and Information Science, 562–74. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-65551-2_41.

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Hillemacher, Steffen, Nicolas Jäckel, Christopher Kugler, Philipp Orth, David Schmalzing, and Louis Wachtmeister. "Artifact-Based Analysis for the Development of Collaborative Embedded Systems." In Model-Based Engineering of Collaborative Embedded Systems, 315–31. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-62136-0_17.

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AbstractOne of the major challenges of heterogeneous tool environments is the management of different artifacts and their relationships. Artifacts can be interdependent in many ways, but dependencies are not always obvious. Furthermore, different artifact types are highly heterogeneous, which makes tracing and analyzing their dependencies complicated. As development projects are subject to constant change, references to other artifacts can become outdated. Artifact modeling tackles these challenges by making the artifacts and relationships explicit and providing a means of automated analysis. We present a methodology for artifact-based analysis that enables analysis of heterogeneous tool environments for architectural properties, inconsistencies, and optimizations.

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Kriebel, Florian, Faiq Khalid, Bharath Srinivas Prabakaran, Semeen Rehman, and Muhammad Shafique. "Fault-Tolerant Computing with Heterogeneous Hardening Modes." In Dependable Embedded Systems, 161–80. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-52017-5_7.

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AbstractFault-tolerance using (full-scale) redundancy-based techniques has been employed to detect and correct reliability errors (i.e., soft errors), but they pose significant area and power overhead. On the other hand, due to the masking and the error tolerance properties at different system layers and of different applications, respectively, reliable heterogeneous architectures have been emerged as an attractive design choice for power-efficient dependable computing platforms. This chapter discusses the building blocks of such computing systems, based on both embedded and superscalar processors, with different reliability (fault-tolerant) modes at the architecture layer to memories like caches, for heterogeneous in-order and out-of-order processors. We provide a comprehensive reliability, i.e., soft error, vulnerability analysis of different components in in-order and out-of-order processors, e.g., caches. We also discuss different methodologies to improve the performance and power of such a system by analyzing these vulnerabilities. Moreover, we show how such heterogeneous hardware-level hardening modes can further be complemented by software-level techniques that can be realized using a reliability-driven compiler (as introduced in Chapter “Dependable Software Generation and Execution on Embedded Systems”).

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Albers, Susanne, and Jens Quedenfeld. "Algorithms for Energy Conservation in Heterogeneous Data Centers." In Lecture Notes in Computer Science, 75–89. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-75242-2_5.

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AbstractPower consumption is the major cost factor in data centers. It can be reduced by dynamically right-sizing the data center according to the currently arriving jobs. If there is a long period with low load, servers can be powered down to save energy. For identical machines, the problem has already been solved optimally by [25] and [1].In this paper, we study how a data-center with heterogeneous servers can dynamically be right-sized to minimize the energy consumption. There are d different server types with various operating and switching costs. We present a deterministic online algorithm that achieves a competitive ratio of 2d as well as a randomized version that is 1.58d-competitive. Furthermore, we show that there is no deterministic online algorithm that attains a competitive ratio smaller than 2d. Hence our deterministic algorithm is optimal. In contrast to related problems like convex body chasing and convex function chasing [17, 30], we investigate the discrete setting where the number of active servers must be an integral, so we gain truly feasible solutions.

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Ricciotti, Wilmer, and James Cheney. "Query Lifting." In Programming Languages and Systems, 579–606. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-72019-3_21.

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AbstractLanguage-integrated query based on comprehension syntax is a powerful technique for safe database programming, and provides a basis for advanced techniques such as query shredding or query flattening that allow efficient programming with complex nested collections. However, the foundations of these techniques are lacking: although SQL, the most widely-used database query language, supports heterogeneous queries that mix set and multiset semantics, these important capabilities are not supported by known correctness results or implementations that assume homogeneous collections. In this paper we study language-integrated query for a heterogeneous query language $$\mathcal {NRC}_{\lambda }( Set,Bag )$$ NRC λ ( S e t , B a g ) that combines set and multiset constructs. We show how to normalize and translate queries to SQL, and develop a novel approach to querying heterogeneous nested collections, based on the insight that “local” query subexpressions that calculate nested subcollections can be “lifted” to the top level analogously to lambda-lifting for local function definitions.

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Conference papers on the topic "Heterogeneous CAD"

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Rosen, David W., Namin Jeong, and Yan Wang. "A Hierarchical, Heterogeneous CAD Modeling Approach." In ASME 2011 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/detc2011-47550.

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Integration of material composition, microstructure, and mechanical properties with geometry information enables many product development activities, including design, analysis, and manufacturing. In this paper, we propose the modeling of part geometry and microstructure by using a new hierarchical modeling method that utilizes a common geometric model for both macro-scale part geometry and material microstructure. A new surfacelet transform is introduced to model microstructure. The application of image processing methods enables multi-resolution representations of microstructure. Combined with methods from computational materials design, low resolution microstructure representations can be used to compute effective mechanical properties at the macro-scale. Wavelet decomposition was used to generate the low resolution representations. The models and methods are demonstrated with two examples, a simple continuous-fiber-reinforced composite and a nanofiber reinforced polymer material.

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You, Yaohui, Xinyu Kou, and S. Tan. "Adaptive Tetrahedral Mesh Generation of 3D Heterogeneous Objects." In CAD'14. CAD Solutions LLC, 2014. http://dx.doi.org/10.14733/cadconfp.2014.155-157.

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Kou, X. Y., and S. T. Tan. "An Interactive CAD Environment for Heterogeneous Object Design." In ASME 2004 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/detc2004-57671.

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Traditional computer aided design (CAD) systems assume that the solids under design are homogeneous in material compositions. Recent studies have shown that solids made of heterogeneous materials (multiple materials, functionally graded materials etc.) prevail in some aspects in terms of mechanical, thermal or electrical performances. Most of the traditional CAD systems fail to represent, maintain and visualize such heterogeneous components, and there have been no commercial heterogeneous CAD modelers in the market. This paper proposes a new interactive CAD environment for heterogeneous object design, in which the geometry, topology and material information of a CAD model can be simultaneously manipulated. The functionalities of a heterogeneous CAD modeler are identified first, and a framework for heterogeneous object design is proposed. The issues of data representation, data maintenance (edition and update) and 3D visualizations are discussed. An interactive software package based on this framework—CAD4D is presented and detail examples are illustrated.

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Chen, Yonghua, and Ying Wei. "Simulation of a Robot Machining System Based on Heterogeneous-Resolution Representation." In CAD'15. CAD Solutions LLC, 2015. http://dx.doi.org/10.14733/cadconfp.2015.416-420.

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Rosen, David W. "Multi-Scale, Heterogeneous CAD Representation for Metal Alloy Microstructures." In ASME 2014 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/detc2014-34563.

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Most heterogeneous CAD representations in the literature represent materials using a volume fraction vector, which may not by physically realizable or meaningful. In contrast, the multi-scale, heterogeneous CAD representation presented here models materials using their microstructure. For the specific metal alloys of interest in this work, the material model is a probabilistic model of grain characteristics, represented as cumulative distribution functions. Several microstructure reconstruction algorithms are presented that enable different alloy grain structures to be reconstructed in a part model. Reconstructions can be performed at any desired size scale, illustrating the multi-scale capability of the representation. A part rendering algorithm is presented for displaying parts with their material microstructures. The multi-scale, heterogeneous CAD representation is demonstrated on two Inconel alloys and is shown to be capable of faithfully reconstructing part representations consistent with the probabilistic grain models.

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Bowman, Eric, Greg Jensen, and David Shumway. "Pseudo-Singleton Pattern and Agnostic Business Layer for Multi-Engineer, Synchronous, Heterogeneous CAD." In CAD'16. CAD Solutions LLC, 2016. http://dx.doi.org/10.14733/cadconfp.2016.49-54.

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You, Yaohui. "Adaptive Tetrahedral Mesh Generation of 3D Heterogeneous Objects." In CAD'14 Hong Kong. CAD Solutions LLC, 2014. http://dx.doi.org/10.14733/cadconfp.2014.160-162.

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Liu, Jie, Bicheng Wu, Xiaojun Liu, and Edward A. Lee. "Interoperation of heterogeneous CAD tools in Ptolemy II." In Design, Test, and Microfabrication of MEMS/MOEMS, edited by Bernard Courtois, Selden B. Crary, Wolfgang Ehrfeld, Hiroyuki Fujita, Jean Michel Karam, and Karen W. Markus. SPIE, 1999. http://dx.doi.org/10.1117/12.341208.

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"Simulation of a Robot Machining System Based on Heterogeneous-Resolution Representation." In CAD'15 London. CAD Solutions LLC, 2015. http://dx.doi.org/10.14733/cadconfp.2015.481-486.

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Xu, Anping, Ting Zang, Zhenpeng Ji, and Yunxia Qu. "HO-CAD: A CAD System for Heterogeneous Objects Modeling Based on ACIS and HOOPS." In 2009 Second International Conference on Intelligent Networks and Intelligent Systems (ICINIS). IEEE, 2009. http://dx.doi.org/10.1109/icinis.2009.32.

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Reports on the topic "Heterogeneous CAD"

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Creighton, J. R., and M. E. Coltrin. Heterogeneous reaction mechanisms and kinetics relevant to the CVD of semiconductor materials. Office of Scientific and Technical Information (OSTI), March 1994. http://dx.doi.org/10.2172/10146724.

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Krishna, Kala, Abhiroop Mukhopadhyay, and Cemile Yavas. Trade with Labor Market Distortions and Heterogeneous Labor: Why Trade Can Hurt. Cambridge, MA: National Bureau of Economic Research, July 2002. http://dx.doi.org/10.3386/w9086.

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Beckham, Gregg T. Base-Catalyzed Depolymerization of Lignin with Heterogeneous Catalysts: Cooperative Research and Development Final Report, CRADA Number CRD-13-513. Office of Scientific and Technical Information (OSTI), August 2015. http://dx.doi.org/10.2172/1215337.

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Clausen, Jay, Samuel Beal, Thomas Georgian, Kevin Gardner, Thomas Douglas, and Ashley Mossell. Effects of milling on the metals analysis of soil samples containing metallic residues. Engineer Research and Development Center (U.S.), July 2021. http://dx.doi.org/10.21079/11681/41241.

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Metallic residues are distributed heterogeneously onto small-arms range soils from projectile fragmentation upon impact with a target or berm backstop. Incremental Sampling Methodology (ISM) can address the spatially heterogeneous contamination of surface soils on small-arms ranges, but representative kilogram-sized ISM subsamples are affected by the range of metallic residue particle sizes in the sample. This study compares the precision and concentrations of metals in a small-arms range soil sample processed by a puck mill, ring and puck mill, ball mill, and mortar and pestle prior to analysis. The ball mill, puck mill, and puck and ring mill produced acceptable relative standard deviations of less than 15% for the anthropogenic metals of interest (Lead (Pb), Antimony (Sb), Copper (Cu), and Zinc (Zn)), with the ball mill exhibiting the greatest precision for Pb, Cu, and Zn. Precision by mortar and pestle, without milling, was considerably higher (40% to >100%) for anthropogenic metals. Media anthropogenic metal concentrations varied by more than 40% between milling methods, with the greatest concentrations produced by the puck mill, followed by the puck and ring mill and then the ball mill. Metal concentrations were also dependent on milling time, with concentrations stabilizing for the puck mill by 300 s but still increasing for the ball mill over 20 h. Differences in metal concentrations were not directly related to the surface area of the milled sample. Overall, the tested milling methods were successful in producing reproducible data for soils containing metallic residues. However, the effects of milling type and time on concentrations require consideration in environmental investigations.

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Kodupuganti, Swapneel R., Sonu Mathew, and Srinivas S. Pulugurtha. Modeling Operational Performance of Urban Roads with Heterogeneous Traffic Conditions. Mineta Transportation Institute, January 2021. http://dx.doi.org/10.31979/mti.2021.1802.

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The rapid growth in population and related demand for travel during the past few decades has had a catalytic effect on traffic congestion, air quality, and safety in many urban areas. Transportation managers and planners have planned for new facilities to cater to the needs of users of alternative modes of transportation (e.g., public transportation, walking, and bicycling) over the next decade. However, there are no widely accepted methods, nor there is enough evidence to justify whether such plans are instrumental in improving mobility of the transportation system. Therefore, this project researches the operational performance of urban roads with heterogeneous traffic conditions to improve the mobility and reliability of people and goods. A 4-mile stretch of the Blue Line light rail transit (LRT) extension, which connects Old Concord Rd and the University of North Carolina at Charlotte’s main campus on N Tryon St in Charlotte, North Carolina, was considered for travel time reliability analysis. The influence of crosswalks, sidewalks, trails, greenways, on-street bicycle lanes, bus/LRT routes and stops/stations, and street network characteristics on travel time reliability were comprehensively considered from a multimodal perspective. Likewise, a 2.5-mile-long section of the Blue Line LRT extension, which connects University City Blvd and Mallard Creek Church Rd on N Tryon St in Charlotte, North Carolina, was considered for simulation-based operational analysis. Vissim traffic simulation software was used to compute and compare delay, queue length, and maximum queue length at nine intersections to evaluate the influence of vehicles, LRT, pedestrians, and bicyclists, individually and/or combined. The statistical significance of variations in travel time reliability were particularly less in the case of links on N Tryon St with the Blue Line LRT extension. However, a decrease in travel time reliability on some links was observed on the parallel route (I-85) and cross-streets. While a decrease in vehicle delay on northbound and southbound approaches of N Tryon St was observed in most cases after the LRT is in operation, the cross-streets of N Tryon St incurred a relatively higher increase in delay after the LRT is in operation. The current pedestrian and bicycling activity levels seemed insignificant to have an influence on vehicle delay at intersections. The methodological approaches from this research can be used to assess the performance of a transportation facility and identify remedial solutions from a multimodal perspective.

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Bischoff, Thore Sören, Kaja von der Leyen, Simon Winkler-Portmann, Dierk Bauknecht, Kilian Bizer, Matthias Englert, Martin Führ, et al. Regulatory experimentation as a tool to generate learning processes and govern innovation, An analysis of 26 international cases. Sonderforschungsgruppe Institutionenanalyse, 2020. http://dx.doi.org/10.46850/sofia.9783941627857.

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Regulatory experiments can be useful to guide complex transitions in the field of sustainable development. They help to understand the effects of policies and regulations and offer insights into the dynamics of social processes. Empirical studies analyzing heterogeneous samples of regulatory experiments are missing. This paper uses a qualitative content analysis to examine 26 international cases of regulatory experiments in the field of sustainable development. The results show the diversity of existing regulatory experiments in terms of their design. We use the results to formulate implications on how to use regulatory experiments that facilitate learning processes.

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Corriveau, Elizabeth, and Jay Clausen. Application of Incremental Sampling Methodology for subsurface sampling. Engineer Research and Development Center (U.S.), May 2021. http://dx.doi.org/10.21079/11681/40480.

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Historically, researchers studying contaminated sites have used grab sampling to collect soil samples. However, this methodology can introduce error in the analysis because it does not account for the wide variations of contaminant concentrations in soil. An alternative method is the Incremental Sampling Methodology (ISM), which previous studies have shown more accurately captures the true concentration of contaminants over an area, even in heterogeneous soils. This report describes the methods and materials used with ISM to collect soil samples, specifically for the purpose of mapping subsurface contamination from site activities. The field data presented indicates that ISM is a promising methodology for collecting subsurface soil samples containing contaminants of concern, including metals and semivolatile organic compounds (SVOCs), for analysis. Ultimately, this study found ISM to be useful for supplying information to assist in the decisions needed for remediation activities.

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Vélez-Velásquez, Juan Sebastián. Banning Price Discrimination under Imperfect Competition: Evidence from Colombia's Broadband. Banco de la República de Colombia, December 2020. http://dx.doi.org/10.32468/be.1148.

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Economic theory is inconclusive regarding the effects of banning third-degree price discrimination under imperfect competition because they depend on how the competing firms rank their market segments. When, relative to uniform pricing, all competitors want higher prices in the same market segments, a ban on price discrimination will reduce profits and benefit some consumers at the expense of others. If, instead, some firms want to charge higher prices in segments where their competitors want to charge lower prices, price discrimination increases competition driving all prices down. In this case, forcing the firms to charge uniform prices can increase their profits and reduce consumer surplus. We use data on Colombian broadband subscriptions to estimate the demand for internet services. Estimated preferences and assumptions about competition are used to simulate a scenario in which firms lose their ability to price discriminate. Our results show large effects on consumer surplus and large effects on firms’ profits. Aggregate profits increase but the effects for individual firms are heterogeneous. The effects on consumer welfare vary by city. In most cities, a uniform price regime causes large welfare transfers from low-income households towards high-income households and in a few cities, prices in all segments rise. Poorer households respond to the increase in prices by subscribing to internet plans with slower download speed.

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Baloch, Imdad, Tom Kaye, Saalim Koomar, and Chris McBurnie. Pakistan Topic Brief: Providing Distance Learning to Hard-to-reach Children. EdTech Hub, June 2020. http://dx.doi.org/10.53832/edtechhub.0026.

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The COVID-19 pandemic has resulted in mass school closures across the world. It is expected that the closures in low- and -middle-income countries (LMICs) will have long-term negative consequences on education and also on broader development outcomes. Countries face a number of obstacles to effectively delivering alternative forms of education. Obstacles include limited experience in facing such challenges, limited teacher digital and pedagogical capacity, and infrastructure constraints related to power and connectivity. Furthermore, inequalities in learning outcomes are expected to widen within LMICs due to the challenges of implementing alternative modes of education in remote, rural or marginalised communities. It is expected that the most marginalised children will feel the most substantial negative impacts on their learning outcomes. Educational technology (EdTech) has been identified as a possible solution to address the acute impact of school closures through its potential to provide distance education. In this light, the DFID Pakistan team requested the EdTech Hub develop a topic brief exploring the use of EdTech to support distance learning in Pakistan. Specifically, the team requested the brief explore ways to provide distance education to children in remote rural areas and urban slums. The DFID team also requested that the EdTech Hub explore the different needs of those who have previously been to school in comparison to those who have never enrolled, with reference to EdTech solutions. In order to address these questions, this brief begins with an overview of the Pakistan education landscape. The second section of the brief explores how four modes of alternative education — TV, interactive radio instruction, mobile phones and online learning — can be used to provide alternative education to marginalised groups in Pakistan. Multimodal distance-learning approaches offer the best means of providing education to heterogeneous, hard-to-reach groups. Identifying various tools that can be deployed to meet the needs of specific population segments is an important part of developing a robust distance-learning approach. With this in mind, this section highlights examples of tools that could be used in Pakistan to support a multimodal approach that reaches the most hard-to-reach learners. The third and final section synthesises the article’s findings, presenting recommendations to inform Pakistan’s COVID-19 education response.<br> <br> This topic brief is available on Google Docs.

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