Relevant bibliographies by topics / Solids. Engineering models CAD/CAM systems

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Solids. Engineering models CAD/CAM systems'

Author: Grafiati
Published: 4 June 2021
Last updated: 16 February 2022

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Journal articles on the topic "Solids. Engineering models CAD/CAM systems"

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Chugunov, Mikhail V., Irina N. Polunina, and Anton M. Pjanzin. "E-Tricycle Vehicle Design Based on Parametric CAD/CAE Models." Engineering Technologies and Systems 30, no. 3 (2020): 464–79. http://dx.doi.org/10.15507/2658-4123.030.202003.464-479.

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Introduction. National Technology Initiatives (STI), designed to develop and implement High-Tech tools into engineering practice and based on the Industry 4.0 concept, require appropriate technical solutions for all phases of the product lifecycle from design to disposal. Implementation of the concept involves the formation of technological groups and markets in different directions in particular one of the emerging markets of STI is Auto.Net. At the same time, the product design stage is basic and should be implemented in a form ensuring the entire life cycle of the product on the principles
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Thilmany, Jean. "Where Does CAM Stand?" Mechanical Engineering 129, no. 01 (2007): 30–32. http://dx.doi.org/10.1115/1.2007-jan-2.

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This article describes various engineering ways to use computers in manufacturing industry. Streamlining computer-aided design (CAD) and computer-aided manufacturing (CAM) handoff has long been the dream of engineering organizations that face handoff issues every day. The company, Protomold Co. Inc., ties CAD directly with CAM, to do away with requiring a human in the loop. It makes plastic injection-molded parts from customers’ CAD models. A Minnesota company has nearly automated its mold making. Software designs the mold automatically and automatically commands milling machines. The article
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You, Chun-Fong, and Shen-Chou Yeh. "Engineering Change Propagation System using STEP." Concurrent Engineering 10, no. 4 (2002): 349–56. http://dx.doi.org/10.1177/a030348.

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Reducing the time for engineering changes can greatly shorten a product's life cycle and improve the productivity of enterprises. This work proposes an approach to engineering change propagation between CAD and product data management (PDM) systems. A system for modeling and triggering changes of models of engineering data, geometries, and features, using STEP AP 214 and AP224, is developed. A change in CAD and PDM systems can propagate along a defined path and trigger a rule by which data of another system are changed. The proposed engineering change propagation (ECP) system provides a flexib
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Bond, Alan H. "A predicate logic approach to CAD/CAM modeling." Artificial Intelligence for Engineering Design, Analysis and Manufacturing 6, no. 1 (1992): 39–58. http://dx.doi.org/10.1017/s0890060400002936.

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An approach to CAD and CAM modeling and to the design of CAD/CAM systems is presented. Models of the product and of the process are represented by logical assertions in a common logical language. CAD/CAM functions are represented by the application of logical inference rules, which correspond to the derivation of new information as well as to actions. This allows all the different kinds of model and specification used in design and manufacturing to be represented in a computer in a common form. It therefore allows the representation of constraints and rules connecting any aspects of design and
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Narabu, Yusuke, Jiang Zhu, Tomohisa Tanaka, and Yoshio Saito. "Automatic Manufacturing Feature Extraction of CAD Models for Machining." Key Engineering Materials 447-448 (September 2010): 287–91. http://dx.doi.org/10.4028/www.scientific.net/kem.447-448.287.

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Currently CAD/CAM systems have become more common in automated manufacturing to enhance accuracy and efficiency. However, machining efficiency and accuracy are mainly relied on the experience of the engineer. Therefore, in this research the main aim is to propose the system which automatically analyzes the characteristics of a CAD model and to extract manufacturing features. The method for analyzing shapes of a CAD model represented by triangle mesh is studied. The system can extract planar, spherical, cylindrical, hole, arc, and other curved regions. This research will improve the integration
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Prado-Velasco, Manuel, and Rafael Ortiz-Marín. "Comparison of Computer Extended Descriptive Geometry (CeDG) with CAD in the Modeling of Sheet Metal Patterns." Symmetry 13, no. 4 (2021): 685. http://dx.doi.org/10.3390/sym13040685.

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The emergence of computer-aided design (CAD) has propelled the evolution of the sheet metal engineering field. Sheet metal design software tools include parameters associated to the part’s forming process during the pattern drawing calculation. Current methods avoid the calculation of a first pattern drawing of the flattened part’s neutral surface, independent of the forming process, leading to several methodological limitations. The study evaluates the reliability of the Computer Extended Descriptive Geometry (CeDG) approach to surpass those limitations. Three study cases that cover a signifi
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McWherter, David, Mitchell Peabody, William C. Regli, and Ali Shokoufandeh. "Solid Model Databases: Techniques and Empirical Results." Journal of Computing and Information Science in Engineering 1, no. 4 (2001): 300–310. http://dx.doi.org/10.1115/1.1430233.

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This paper presents techniques for managing solid models in relational database management systems. Our goal is to enable support for traditional database operations (sorting, distance metrics, range queries, nearest neighbors, etc) on large databases of solid models. We introduce an approach to compare models based on shape using information extracted from the model boundary representation into Model Signature Graphs. We show how the Model Signature Graphs can be used to compute topological distances among models and how to use these measures to create metric spaces for indexing and clusterin
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Yurov, Aleksey, V. Sokol'nikov, and K. Merem'yanin. "ORGANIZATION OF TECHNICAL SPECIFICATIONS AND INFORMATION DATA IN 3D MODELS OF SOFTWARE SYSTEMS." Modeling of systems and processes 13, no. 4 (2021): 83–89. http://dx.doi.org/10.12737/2219-0767-2021-13-4-83-89.

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The article discusses issues related to the introduction of additional engineering information into the digital model of the product. It is known that technical conditions and dimensions are an integral part of any drawing, and the expansion of the possibilities for presenting engineering data as part of a digital model allows you to get rid of drawing documents. Most software systems for enterprises use the specified functionality in models, but the transfer of data (models and technical conditions in them) is difficult between systems. An example is exporting data from NX CAD to Solid Works.
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Alpatov, Vadim. "Building constructions modelling problems in modern cae-systems." E3S Web of Conferences 135 (2019): 03066. http://dx.doi.org/10.1051/e3sconf/201913503066.

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This article is about choosing building structure analysis model question. Construction analysis model type choice affects result of counting. Result accuracy and reliability depends on analysis scheme choice. Using modern computers, there is a lot of alternative abilities of creation construction analysis model. This article is made to understand these analysis models features and their influence on result. An example of counting beam in six independent CAD systems is shown. Engineering simulation and design software, which base on finite elements method, were chosen for analysis. These count
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Zhu, Jiang, Yuichi Takekuma, Tomohisa Tanaka, and Yoshio Saito. "3D Model Registration Based on Feature Extraction." Advanced Materials Research 299-300 (July 2011): 1091–94. http://dx.doi.org/10.4028/www.scientific.net/amr.299-300.1091.

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Currently, design and processing of complicated model are enabled by the progress of the CAD/CAM system. In shape measurement, high precision measurement is performed using CMM. In order to evaluate the machined part, the designed model made by CAD system the point cloud data provided by the measurement system are analyzed and compared. Usually, the designed CAD model and measured point cloud data are made in the different coordinate systems, it is necessary to register those models in the same coordinate system for evaluation. In this research, a 3D model registration method based on feature
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Dissertations / Theses on the topic "Solids. Engineering models CAD/CAM systems"

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Kwong, Kin-wa. "Computer-aided parting line and parting surface generation in mould design /." [Hong Kong : University of Hong Kong], 1992. http://sunzi.lib.hku.hk/hkuto/record.jsp?B1341804X.

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鄺建華 and Kin-wa Kwong. "Computer-aided parting line and parting surface generation in mould design." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1992. http://hub.hku.hk/bib/B31233119.

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Baum, Robert Adam. "A tolerance representation scheme for solid models." Thesis, Georgia Institute of Technology, 1989. http://hdl.handle.net/1853/18180.

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Deal, Julia L. "Assessment of classical database models for representing solids /." Online version of thesis, 1987. http://hdl.handle.net/1850/8804.

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Ng, Wai-ming Micky. "Orientating, tessellating and direct slicing of 3D CAD models : improving accuracy and efficiency for rapid prototyping process /." Hong Kong : University of Hong Kong, 1998. http://sunzi.lib.hku.hk/hkuto/record.jsp?B19537621.

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吳偉明 and Wai-ming Micky Ng. "Orientating, tessellating and direct slicing of 3D CAD models: improving accuracy and efficiency forrapid prototyping process." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1998. http://hub.hku.hk/bib/B31219767.

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TAMBE, SOURABH M. "INCORPORATING GEOMETRIC TOLERANCE INFORMATION IN SOLID MODELS TO BUILD AUTOMATED INSPECTION SYSTEMS." University of Cincinnati / OhioLINK, 2004. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1092924245.

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Lynn, Charity M. "Accuracy models for SLA build style decision support." Thesis, Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/16832.

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Johnson, Chad A. "The integration of CAD/CAM with virtual machining simulation and cost estimation." Ohio : Ohio University, 1997. http://www.ohiolink.edu/etd/view.cgi?ohiou1177434959.

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Books on the topic "Solids. Engineering models CAD/CAM systems"

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Symposium, on Solid Modeling Foundations and CAD/CAM Applications (1991 Austin Tex ). Proceedings. ACM Press, 1991.

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IFIP TC5/WG5.2 Working Conference on Geometric Modeling for Product Engineering (1990 Rensselaerville, N.Y.). Product modeling for computer-aided design and manufacturing: Selected and expanded papers from the IFIP TC5/WG5.2 Working Conference on Geometric Modeling for Product Engineering, Rensselaerville, U.S.A., 17-21 June 1990. North-Holland, 1991.

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M, Patrikalakis N., Lee Kunwoo, and SIGGRAPH, eds. Proceedings: Seventh ACM Symposium on Solid Modeling and Applications : SM '02 : June 17-21, 2002, Saarbrućken, Germany. ACM Press, 2002.

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1960-, Elber Gershon, Shapiro Vadim, and SIGGRAPH, eds. Proceedings: Eighth ACM Symposium on Solid Modeling and Applications : SM '03 : June 16-20, 2003, Seattle, Washington, USA. Association for Computing Machinery, 2003.

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Smith, Brad Lee. Initial Graphics Exchange Specification (IGES), version 3.0. Society of Automotive Engineers, 1986.

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Zhukov, Aleksey, Vladimir Astashkin, Vil'en Zholudov, and Vyacheslav Semenov. Industrial construction. Buildings and constructions. Corrosion protection and ecology. INFRA-M Academic Publishing LLC., 2020. http://dx.doi.org/10.12737/1064907.

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This monograph summarizes the modern experience of protection of industrial buildings and structures against aggressive impacts are considered characteristic of corrosion processes under the action of liquid, solid and gaseous environments on the main building materials.
 Provides a system of regulating the degree of aggressiveness for different parts of buildings and constructions basic provisions for the selection of chemically resistant structures and materials, design methodology section corrosion protection. Systematic design methods of protecting groundwater and soil against aggress
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Symposium on Solid Modeling Foundations and Cad/Cam Applications, Radisson Plaza Hotel, Austin, Texas, June 5-7, 1991, Proceedings. Assn for Computing Machinery, 1991.

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Michael, Iuliano, McLean Charles, and National Institute of Standards and Technology (U.S.), eds. Development of manufacturing systems models using VRML. U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology, 1997.

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Michael, Iuliano, McLean Charles, and National Institute of Standards and Technology (U.S.), eds. Development of manufacturing systems models using VRML. U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology, 1997.

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Michael, Iuliano, McLean Charles, and National Institute of Standards and Technology (U.S.), eds. Development of manufacturing systems models using VRML. U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology, 1997.

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Book chapters on the topic "Solids. Engineering models CAD/CAM systems"

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Smolin, Alexey Yu, Galina M. Eremina, and Evgeny V. Shilko. "A Tool for Studying the Mechanical Behavior of the Bone–Endoprosthesis System Based on Multi-scale Simulation." In Springer Tracts in Mechanical Engineering. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-60124-9_5.

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AbstractThe chapter presents recent advances in developing numerical models for multiscale simulation of the femur–endoprosthesis system for the case of hip resurfacing arthroplasty. The models are based on the movable cellular automaton method, which is a representative of the discrete element approach in solid mechanics and allows correctly simulating mechanical behavior of a variety of elastoplastic materials including fracture and mass mixing. At the lowest scale, the model describes sliding friction between two rough surfaces of TiN coatings, which correspond to different parts of the friction pair of hip resurfacing endoprosthesis. At this scale, such parameters of the contacting surfaces as the thickness, roughness, and mechanical properties are considered explicitly. The next scale of the model corresponds to a resurfacing cap for the femur head rotating in the artificial acetabulum insert. Here, sliding friction is explicitly computed based on the effective coefficient of friction obtained at the previous scale. At the macroscale, the proximal part of the femur with a resurfacing cap is simulated at different loads. The bone is considered as a composite consisting of outer cortical and inner cancellous tissues, which are simulated within two approaches: the first implies their linear elastic behavior, the second considers these tissues as Boit’s poroelastic bodies. The later allows revealing the role of the interstitial biological fluid in the mechanical behavior of the bone. Based on the analysis of the obtained results, the plan for future works is proposed.
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Xu, Xun. "Geometric Modelling and Computer-Aided Design." In Integrating Advanced Computer-Aided Design, Manufacturing, and Numerical Control. IGI Global, 2009. http://dx.doi.org/10.4018/978-1-59904-714-0.ch001.

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One of the key activities in any product design process is to develop a geometric model of the product from the conceptual ideas, which can then be augmented with further engineering information pertaining to the application area. For example, the geometric model of a design may be developed to include material and manufacturing information that can later be used in computer-aided process planning and manufacturing (CAPP/CAM) activities. A geometric model is also a must for any engineering analysis, such as finite elopement analysis (FEA). In mathematic terms, geometric modelling is concerned with defining geometric objects using computational geometry, which is often, represented through computer software or rather a geometric modelling kernel. Geometry may be defined with the help of a wire-frame model, surface model, or solid model. Geometric modelling has now become an integral part of any computer-aided design (CAD) system. In this chapter, various geometric modelling approaches, such as wire-frame, surface, and solid modelling will be discussed. Basic computational geometric methods for defining simple entities such as curves, surfaces, and solids are given. Concepts of parametric, variational, history-based, and history-free CAD systems are explained. These topics are discussed in this opening chapter because (a) CAD was the very first computer-aided technologies developed and (b) its related techniques and methods have been pervasive in the other related subjects like computer-aided manufacturing. This chapter only discusses CAD systems from the application point of view; CAD data formats and data exchange issues are covered in the second chapter.
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Xu, Xun. "Integration of CAD/CAPP/CAM/CNC." In Integrating Advanced Computer-Aided Design, Manufacturing, and Numerical Control. IGI Global, 2009. http://dx.doi.org/10.4018/978-1-59904-714-0.ch010.

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Technologies concerning computer-aided design, process planning, manufacturing and numerical control, have matured to a point that commercialized software solutions and industrial systems can be acquired readily. These solutions or systems are, however, not necessarily connected in a seamless way, that is they are not fiintegrated. The term “islands of automation” has been used to describe these disconnected groups of systems with no obvious integration points other than the end user. As the engineering businesses are increasingly being run in a more globalized fashion, these islands of automation need to be connected to better suit and serve the collaborative and distributed environment. It is evident that the businesses are struggling with this integration strategy at a number of levels other than the underlying technology, including CAD, CAPP, CAM, and CNC for example. In some cases, where integration does not exist among these computer-aided solutions, promising product technologies may come to a sudden halt against these barriers. The previous chapters have focused on these individual computer-aided solutions, e.g. CAD, CAPP, CAM, CNC, and feature technologies. Some localized integration such as integrated feature technology has been studied. The following chapters, will in particular, look at the integration issues, technologies, and solutions. This chapter starts with a general description of traditional CAD, CAPP, CAM, and CNC integration models. This is followed by an industry case study showcasing how a proprietary CAD/CAM can be used to achieve centralized integration. To illustrate CAM/CNC integration, three different efforts are mentioned. They are APT, BCL (Binary Cutter Location, (EIA/ANSI, 1992)), BNCL (Base Numerical Control Language, (Fortin, Chatelain & Rivest, 2004)) and use of Haskell language for CNC programming (Arroyo, Ochoa, Silva & Vidal, 2004).
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Doraiswamy, L. K. "Reactor Design for Solid-Catalyzed Fluid-Phase Reactions." In Organic Synthesis Engineering. Oxford University Press, 2001. http://dx.doi.org/10.1093/oso/9780195096897.003.0019.

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Catalytic reactions are carried out in reactors with a fixed, fluidized, or moving bed of catalyst. Although the chemical kinetics of the reaction obviously remains the same for all these reactors, the hydrodynamic features vary considerably. Because no complete description of these features is possible, it is convenient to postulate different situations and develop mathematical models to represent these situations for each type of reactor. It is also important to note that wherever solid catalysts are used, the question of catalyst deactivation cannot be ignored. Several books and reviews covering a variety of situations have been written, including those marked with an asterisk in the list of references. They are recommended for general reading. Our intention in this chapter is limited, however: formulate approaches to the design of two main classes of catalytic reactors, fixed and fluidized bed; briefly describe selected procedures along with a few numerical (or methodological) examples to illustrate their use; and outline a procedure for incorporating the effects of catalyst deactivation in reactor design and operation. There are basically two types of fixed-bed reactors: (1) multitubular, in which tubes of approximately 1.5 to 4.0 cm in diameter are placed as a bundle within a shell through which a heat exchange fluid is circulated to control the temperature profile within the reactor; and (2) adiabatic, in which the catalyst is placed directly inside a reactor (with no a priori limitation to the diameter), and heat removal is accomplished by multistaging the bed and removing the heat of reaction by heat exchange between stages. Four major models have been proposed for describing the behavior of a packed tubular reactor (see Doraiswamy and Sharma, 1984). Of these, the most extensively used is the quasi-continuum model in which the fluid-solid system is assumed to act as a single pseudohomogeneous phase with effective properties of its own (as for any true single phase). Thus the procedures developed in Chapters 4 and 10 for the homogeneous model can be used to determine the axial profiles of concentration and temperature. One can also allow for radial transport gradients within each tube [two-dimensional (2-D) models], as opposed to the simpler models in which these gradients are neglected—the one-dimensional (1-D) models.
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Coe, Larry R. "Five Small Secrets to Systems Success." In Advances in Computer and Electrical Engineering. IGI Global, 2001. http://dx.doi.org/10.4018/978-1-930708-04-4.ch003.

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A pervasive theme today regarding the performance of new systems is “many systems are technical successes, but organizational failures.” Systems that are well designed often fail to meet user expectations at implementation. This chapter details and analyzes the implementation of a major operations support system at a large U.S. firm that fits this theme. Measurements (of success) from a quasi-experiment are used to accurately measure user performance and user expectations pre- and post-system implementation. These measurements offer solid proof that the system achieved key user defined objectives. ... And yet, the system is widely viewed as a failure. This chapter highlights the "organizational chaos" that "technically successful" systems often cause in user organizations when the Systems Delivery process (how systems are delivered to users) is ineffectual. In effect, systems are dropped off at the users' doorsteps. A prescriptive model using five key guidelines is proposed for effective management of the Systems Delivery process. These five relatively small secrets can save corporations millions in investment dollars, reduce negative impacts to customer service, and enhance employee morale and systems acceptance.
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Doraiswamy, L. K. "Multiphase Reactions and Reactors." In Organic Synthesis Engineering. Oxford University Press, 2001. http://dx.doi.org/10.1093/oso/9780195096897.003.0025.

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The first three chapters of this part dealt with two-phase reactions. Although catalysts are not generally present in these systems, they can be used in dissolved form in the liquid phase. This, however, does not increase the number of phases. On the other hand, there are innumerable instances of gas-liquid reactions in which the catalyst is present in solid form. A popular example of this is the slurry reactor so extensively employed in reactions such as hydrogenation and oxidation. There are also situations where the solid is a reactant or where a phasetransfer catalyst is immobilized on a solid support that gives rise to a third phase. A broad classification of three-phase reactions and reactors is presented in Table 17.1 (not all of which are considered here). This is not a complete classification, but it includes most of the important (and potentially important) types of reactions and reactors. The thrust of this chapter is on reactions and reactors involving a gas phase, a liquid phase, and a solid phase which can be either a catalyst (but not a phasetransfer catalyst) or a reactant, with greater emphasis on the former. The book by Ramachandran and Chaudhari (1983) on three-phase catalytic reactions is particularly valuable. Other books and reviews include those of Shah (1979), Chaudhari and Ramachandran (1980), Villermaux (1981), Shah et al. (1982), Hofmann (1983), Crine and L’Homme (1983), Doraiswamy and Sharma (1984), Tarmy et al. (1984), Shah and Deckwer (1985), Chaudhari and Shah (1986), Kohler (1986), Chaudhari et al. (1986), Hanika and Stanek (1986), Joshi et al. (1988), Concordia (1990), Mills et al. (1992), Beenackers and Van Swaaij (1993), and Mills and Chaudhari (1997). Doraiswamy and Sharma (1984) also present a discussion of gas-liquid-solid noncatalytic reactions in which the solid is a reactant. In Chapter 7 we saw how Langmuir-Hinshelwood-Hougen-Watson (LHHW) models are normally used to describe the kinetics of gas-solid (catalytic) or liquid-solid (catalytic) reactions, and in Chapters 14 to 16 we saw how mass transfer between gas and liquid phases can significantly alter the rates and regimes of these two-phase reactions.
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Olang, Luke O., Mathew Herrnegger, Doris Wimmer, and Josef Fürst. "A Spatial Database of Hydrological and Water Resources Information for the Nyangores Watershed of Kenya." In Advances in Environmental Engineering and Green Technologies. IGI Global, 2019. http://dx.doi.org/10.4018/978-1-7998-0163-4.ch008.

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Advances in environmental remote sensing have provided an opportunity to monitor water resource systems in vulnerable regions with data scarcity. The spatial datasets can be used to build spatial models of reality to enable derivation of catchment-based characteristics, also often required by models in hydrology. The derived estimates can then be mapped and cartographically presented to support water resources planning within the concerned developing regions. This contribution presents a database of water resources information for an upstream catchment of the Mara River Basin of Kenya developed from freely available spatial datasets. Additionally, water quality parameters (pH, electrical conductivities, and total dissolved solids) selected as essential indicators of the suitability of the water resources for domestic applications were measured and mapped. The database, packaged as spatial maps, has been presented to the local stakeholders for developing appropriate catchment management strategies within the important watershed.
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Xu, Xun. "From CAD/CAPP/CAM/CNC to PDM, PLM and Beyond." In Integrating Advanced Computer-Aided Design, Manufacturing, and Numerical Control. IGI Global, 2009. http://dx.doi.org/10.4018/978-1-59904-714-0.ch016.

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Companies that have been practicing CAD, CAPP, CAM, and CNC integration have now realized that there is a need to operate in a much broader scope with wider boundaries and more functionality. To foster innovation in a product development lifecycle, change in the early stage is good, and, in fact, should be encouraged. The more iteration a product design can experience at this stage when change is inexpensive, the lower cost our final product will become. At a later stage when hardware set-up is committed against a design, change becomes expensive and should be discouraged. Therefore, there is a need for an effective way of managing product-related information as well as the product development action flow, which captures actions that need to be done, have been done, and what other parts are affected. Engineers that subscribe to a portion of a design also need to be working with other collaborators and then automatically be notified when changes occur. This leads to increased implementation of Product Data Management (PDM) and Product Lifecycle Management (PLM). PDM systems are used to control information, files, documents, and work processes required to design, build, support, distribute, and maintain products. Using PDM, people can contribute at the early stages of product design and development. In addition, PDM can be seen as an integration tool connecting many different areas, which ensures that the right information is available to the right person at the right time and in the right form throughout the enterprise. In this way, PDM improves communication and cooperation be tween diverse groups in an organization, and between organizations and clients (Peltonen, Pitkanen & Sulonen, 1996, Liu & Xu, 2001). PDM is strongly rooted in the world of CAD, CAPP, CAM, and CNC in a more specific sense as well as in the world of engineering and design in a more general sense. In recent years, more focus has also been on the improvement of the entire product lifecycles. The major concern here is time-to-market, as it reflects the competitiveness of a company. In response to the new area of focus, new generation PDM systems are developed to support the entire product lifecycle; from the initial concept to the finishing product. This has subsequently led to the birth to PLM systems. From the information context, PLM should cater for the management of the information throughout the lifecycle of a product, including multiple domain views, different business processes scattered across enterprises and different representations of a multitude of native product-, resource- and process-models (Stark, 2004, Rosén, 2006). This chapter starts with introduction to and discussions about product data management systems. Topics covered include PDM’s capabilities, its benefits, Web-based PDM and PDM standardization. The concept of integrated and extended PDM is also introduced. This is followed by discussions on product lifecycle management, for example definitions of PLM, its solution model, benefits, and implementation are among the topics covered. Like PDM, issues regarding PLM standardisation are also addressed. Share-A-space™ is a practical case of PLM. The core features and its architecture are discussed. Toward the end, the concept and some of the techniques of “grand” integration are introduced.
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Dahanayake, Ajantha. "Future Directions in CASE Repositories." In Successful Software Reengineering. IGI Global, 2002. http://dx.doi.org/10.4018/978-1-931777-12-4.ch003.

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Today, components and Component Based Development (CBD) is seen as one of the important events in the evolution of information technology. Components and CBD offer the promise of a software marketplace where components may be built, bought, or sold in a manner similar to components in other industries. In the light of the ongoing developments, in the manner and art of developing software systems, it is important to consider how the Computer Aided Systems Engineering (CASE) environment that supports building these systems can be produced on a CBD approach. In spite of the fact that CASE environments have been around since the ’70s, there are still many problems with these environments. Among the problems of CASE environments are the lack of conceptual models to help understand the technology, the poor state of user requirements specification, inflexible method, support and complicated integration facilities, which contribute to the dissatisfaction in CASE users.
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Chimowitz, Eldred H. "Supercritical Adsorption." In Introduction to Critical Phenomena in Fluids. Oxford University Press, 2005. http://dx.doi.org/10.1093/oso/9780195119305.003.0008.

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In this chapter, we discuss adsorption phenomena in supercritical systems, a situation that occurs in many application areas in chemical-process and materials engineering. An example of a commercial application in this area, which has achieved wide acceptance as a tool in analytical chemistry, is supercritical fluid chromatography (SFC). Not only is SFC a powerful technique for chemical analysis, but it also is a useful method for measuring transportive and thermodynamic properties in the near-critical systems. In the next section, we analyze adsorption-column dynamics using simple dynamic models, and describe how data from a chromatographic column can be used to estimate various thermodynamic and transport properties.We then proceed to discuss the effects of proximity to the critical point on adsorption behavior in these systems. The closer the system is to its critical point, the more interesting is its behavior. For very dilute solute systems, like those considered here, the energy balance is often ignored to a first approximation; this leads to a simple set of mass-balance equations defining transport for each species. These equations can be developed to various levels of complexity, depending upon the treatment of the adsorbent (stationary phase). The conceptual view of these phases can span a wide range of possibilities ranging from completely nonporous solids (fused structures) to porous materials with complicated ill-defined pore structures. Given these considerations, it is customary to make the following assumptions in the development of a simple model of adsorber-bed dynamics: . . .1. The stationary and mobile phases are continuous in the direction of the flow, with the fluid phase possessing a flat velocity profile (“plug” flow).. . . . . . 2. The porosity of the stationary phase is considered constant irrespective of pressure and temperature conditions (i.e., it is incompressible). . . . . . .3. The column is considered to be radially homogeneous, leading to a set of equations with one spatially independent variable, representing distance along the column axis. . . . . . . 4. The dispersion term in the model equation represents the combined effects of molecular diffusion and dispersion due to convective stirring in the bed. These effects are combined into an effective phenomenological dispersion coefficient, considered to be constant throughout the column. . . .
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Conference papers on the topic "Solids. Engineering models CAD/CAM systems"

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Zeng, Sai, Edward J. Kim, Gregory M. Mocko, Angran Xiao, Russell Peak, and Farrokh Mistree. "Systematic Design Method for Information Modeling in CAD/CAE." In ASME 2003 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/detc2003/cie-48241.

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As engineering systems are increasingly becoming more complex, the need for information models is growing accordingly. Extensive research is currently underway to develop engineering data management capabilities and to understand the role of information as a systems integrator. In order to develop information models more effectively, a systematic methodology is needed to better manage data and develop information models. In the area of CAD/CAE/CAM applications, an information gap exists between design models and analysis models. To this end, a multi-representational architecture (MRA) is prese
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Nonaka, Norihiko, and Ichirou Nishigaki. "An Automatic Technique for CAE Analysis With a 3D-CAD Model." In ASME 2002 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2002. http://dx.doi.org/10.1115/detc2002/cie-34486.

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A CAE (computer-aided engineering) analysis system, consisting of a 3D-CAD (three-dimensional computer-aided design) modeler, a pre-processor, an analysis solver, and a post-processor, was developed. This system uses automated procedures for solid modeling, definition of analysis models (i.e., defining boundary conditions and material properties, traditionally done manually), mesh generation, numerical simulation, and visualization of results. The CAE analysis system has two key features: it can greatly reduce the analysis time, and it uses a 3D-CAD model as the geometric model for numerical a
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Chang, Jack, Mark Ganter, and Duane Storti. "Interval Method for Interrogation of Implicit Solid Models." In ASME 2000 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2000. http://dx.doi.org/10.1115/detc2000/dac-14290.

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Abstract Computer-aided design/manufacturing (CAD/CAM) systems intended to support automated design and manufacturing applications such as shape generation and solid free-form fabrication (SFF) must provide not only methods for creating and editing models of objects to be manufactured, but also methods for interrogating the models. Interrogation refers to any process that derives information from the model. Typical interrogation tasks include determine surface area, volume or inertial properties, computing surface points and normals for rendering, and computing slice descriptions for SFF. Whil
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Bao, Zhuojun. "Extended Bintrees for Representing the Spatial Decomposition of 3D Objects." In ASME 1999 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/detc99/dac-8683.

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Abstract Extended bintree as a new class of approximation models for solid modeling is presented in this paper. Based on the bintree data structure, it allows face, edge and vertex node types as well as the classical black, white and grey nodes. Using extended bintrees, Boolean operations can be carried out and are used to generate a new object representation. The required memory is less than that in term of bintree, that is a generalization of the quadtree and octree. This gives a new efficient way to represent polygonal and polyhedral objects exactly. The extended bintree is a general method
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Jha, Prabhudutt. "Integration of CAD to CAM Through Feature Recognition Based Solid Modeling." In ASME 1995 15th International Computers in Engineering Conference and the ASME 1995 9th Annual Engineering Database Symposium collocated with the ASME 1995 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1995. http://dx.doi.org/10.1115/cie1995-0783.

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Abstract This paper deals with the development of a system to convert a general positive-based solid geometry data set into one more suitable for process planning. The basic software used is IDEAS for solid modeling on IBM/RS 6000 workstation. The objective is to capture design and manufacturing knowledge in existing engineering drawings of CAD/CAM databases and then convert the captured design features into workable products through feature recognition techniques. The paper presents an approach of converting CSG geometry representation to a DSG (Destructive Solid Geometry) form and then resul
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Summers, Joshua D. "Comparative Study of CAD Interrogation Capabilities: Commercial CAD vs. Design Exemplar." In ASME 2005 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/detc2005-85112.

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The design exemplar has been proposed as an approach to developing a CAD query language based upon an analysis of the design exemplar components, vocabulary, and extensions to support logical connectives. Design engineers create models of design artifacts with commercial Computer Aided Design (CAD) solid modeling systems. These systems stop short of providing support for querying and retrieving data from within the CAD data files. The design exemplar data structure and algorithm are offered in this paper as a new tool for interrogation of CAD models. The querying capabilities of a comprehensiv
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Shalon, Dari, David Gossard, Karl Ulrich, and David Fitzpatrick. "Representing Geometric Viariations in Complex Structural Assemblies on CAD Systems." In ASME 1992 Design Technical Conferences. American Society of Mechanical Engineers, 1992. http://dx.doi.org/10.1115/detc1992-0157.

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Abstract In previous airplane programs, Boeing identified interferences and misalignments between airplane parts as the two largest causes of engineering changes. Boeing is currently designing the 777 with a state-of-the-art solid modeling system. While the system is capable of detecting interferences and misalignments between ideally-sized and ideally-located solid models, it cannot model the effects of variation in the size, shape and location of parts and tools. This paper presents an initial, novel framework for modeling these variations called Indexed Pre-Assembly with Variation (IPAV). T
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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
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Liu, X., G. Dodds, B. K. Hinds, and J. McCartney. "Virtual DesignWorks: Designing 3D CAD Models Via Touch Interaction." In ASME 2003 International Mechanical Engineering Congress and Exposition. ASMEDC, 2003. http://dx.doi.org/10.1115/imece2003-43993.

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Virtual reality (VR) devices, such as haptic (force feedback) devices, provide users with virtual environments where they can interact with digital models in 3D. Haptic devices show great promise for use in design. However, current haptic systems are used primarily to verify rather than to interact with CAD systems to modify a design. In order to use haptic devices in the design of CAD models, we use component technology (COM+) to develop a novel haptic model system—which we have termed super-object modeling. The novel haptic model solves several crucial problems for seamlessly integrating CAD
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ZHOU, Huiqun, and Jianjun WU. "New Algorithm for CAD Solid Model Direct Slicing on Rapid Prototyping." In The 2015 International Conference on Mechanical Engineering and Control Systems (MECS2015). WORLD SCIENTIFIC, 2016. http://dx.doi.org/10.1142/9789814740616_0022.

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