Relevant bibliographies by topics / Rotational part

Contents

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

Academic literature on the topic 'Rotational part'

Author: Grafiati
Published: 4 June 2021
Last updated: 18 February 2022

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Journal articles on the topic "Rotational part"

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Mottershead, John E., Andreas Kyprianou, and Huajiang Ouyang. "Structural modification. Part 1: rotational receptances." Journal of Sound and Vibration 284, no. 1-2 (2005): 249–65. http://dx.doi.org/10.1016/j.jsv.2004.06.021.

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Stepanian, N. N. "Coronal Holes and Background Magnetic Fields on the Sun." International Astronomical Union Colloquium 144 (1994): 61–64. http://dx.doi.org/10.1017/s0252921100025008.

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AbstractSize, lifetime and rotational rate of coronal holes (CH) and their connection with background magnetic field (BMF) structures were studied on the base of Solar Geophysical Data (1977-1987).Mean sizes of CH are (1-3) × 1011cm, changing with solar cycle and latitude. Mean life time is 5 rotations. Only small part of CH has rigid rotation. Most of them show differential rotation. CH appear in structures of BMF with the sign of polar magnetic field of corresponding hemisphere about 5-10 rotations after polar field reversal. Rotation rates of CH and BMF near the solar equator are almost the
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Nemes, A., Z. Kovács, Á. Kormányos, et al. "Left ventricular apical rotation is associated with mitral annular function in healthy subjects. Results from the three-dimensional speckle-tracking echocardiographic MAGYAR-Healthy Study." Physiology International 107, no. 1 (2020): 145–54. http://dx.doi.org/10.1556/2060.2020.00002.

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AbstractIntroductionLeft ventricular (LV) twist is considered an essential part of LV function due to oppositely directed LV basal and apical rotations. Several factors could play a role in determining LV rotational mechanics in normal circumstances. This study aimed to investigate the relationship between LV rotational mechanics and mitral annular (MA) size and function in healthy subjects.MethodsThe study comprised 118 healthy adult volunteers (mean age: 31.5 ± 11.8 years, 50 males). All subjects had undergone complete two-dimensional (2D) Doppler echocardiography and three-dimensional speck
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Daskopoulos, P., and A. M. Lenhoff. "Flow in curved ducts. Part 2. Rotating ducts." Journal of Fluid Mechanics 217 (August 1990): 575–93. http://dx.doi.org/10.1017/s0022112090000854.

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When a coiled tube is rotated about the coil axis, the effects of rotation interact with centrifugal and viscous effects to complicate the flow characteristics beyond those seen in stationary curved ducts. The phenomena encountered are examined for steady, fully developed Newtonian flow in circular tubes of small curvature. The governing equations are solved using orthogonal collocation, and the results presented cover both the nature of the flow and the bifurcation structure. When rotation is in the same direction as the axial flow imposed by a pressure gradient, the flow structure remains si
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Schlaak, Hans-Joachim. "Excitation of Low-Frequency Rotational Vibration." Journal of Low Frequency Noise, Vibration and Active Control 12, no. 4 (1993): 123–27. http://dx.doi.org/10.1177/026309239301200402.

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Special exciters are necessary to calibrate angular accelerometers, angular velocimeters and rotational angle transducers. This paper presents methods designed for the generation of low-frequency uniaxial rotational quantities. The operating principle, the construction and the technical characteristics of the rotational exciters are described. The air-borne rotational exciters (prototypes) allow sinusoidal angular vibrations in the frequency range from 0.5 to 1000 Hz to be generated. Another mode of operation is the excitation of sinusoidal vibrations by the rotation of the moving exciter part
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LI, RONG-K. WEI. "A part-feature recognition system for rotational parts." International Journal of Production Research 26, no. 9 (1988): 1451–75. http://dx.doi.org/10.1080/00207548808947959.

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Slătineanu, Laurenţiu, Oana Dodun, Margareta Coteaţă, Gheorghe Nagîţ, and Irina Beşliu. "Simplified Version of Polymer Rotational Molding Manufacturing Method." Key Engineering Materials 699 (July 2016): 97–103. http://dx.doi.org/10.4028/www.scientific.net/kem.699.97.

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Rotational molding is a manufacturing method which supposes the rotation of the mold, during the solidification of the liquid phase material, so that finally a part having a hollow could be obtained. The method could be applied in manufacturing of metallic and nonmetallic parts. Usually, the equipment for rotational molding ensures slow speed rotating of the mold around two axes placed perpendicularly each other and this fact led to relatively complex equipment for achieving rotational molding. The capacity of the liquid material to entirely cover the internal walls of the mold depends essenti
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CZINNER, VIKTOR G., and MÁTYÁS VASÚTH. "REVISITING ROTATIONAL PERTURBATIONS AND THE MICROWAVE BACKGROUND." International Journal of Modern Physics D 16, no. 11 (2007): 1715–23. http://dx.doi.org/10.1142/s0218271807011176.

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We consider general-relativistic rotational perturbations in homogeneous and isotropic Friedmann–Robertson–Walker (FRW) cosmologies. Taking linear perturbations of FRW models, the general solution to the field equations contains tensorial, vectorial and scalar functions. The vectorial terms are in connection with rotations in the given model and due to the Sachs–Wolfe effect they produce contributions to the temperature fluctuations of the cosmic microwave background radiation (CMBR). In this paper we obtain the analytic time dependence of these contributions in a spatially flat FRW model with
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Tian, Shuling, Yisheng Gao, Xiangrui Dong, and Chaoqun Liu. "Definitions of vortex vector and vortex." Journal of Fluid Mechanics 849 (June 18, 2018): 312–39. http://dx.doi.org/10.1017/jfm.2018.406.

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Although the vortex is ubiquitous in nature, its definition is somewhat ambiguous in the field of fluid dynamics. In this absence of a rigorous mathematical definition, considerable confusion appears to exist in visualizing and understanding the coherent vortical structures in turbulence. Cited in the previous studies, a vortex cannot be fully described by vorticity, and vorticity should be further decomposed into a rotational and a non-rotational part to represent the rotation and the shear, respectively. In this paper, we introduce several new concepts, including local fluid rotation at a po
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Kalita, W., N. Yegani, Cz M. Rodkiewicz, and J. S. Kennedy. "On the Laminar Flow Characteristics of Conical Bearings. Part II—Experimental Verification." Journal of Tribology 108, no. 1 (1986): 59–64. http://dx.doi.org/10.1115/1.3261144.

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The laminar flow characteristics of the externally pressurized central recess conical bearings with narrow gaps, predicted theoretically in Part I of this paper, have been verified experimentally. Two main effects on the performance of conical bearings have been investigated, namely: the effect of nonconstant film thickness along the gap of the bearing and the effect of rotation. It was found that experimental pressure distributions and load capacity of the constant and divergent gap bearings were in close agreement with the theoretical data for the low rotational velocities however, with the
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Dissertations / Theses on the topic "Rotational part"

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Yao, Suqin. "Computer-Aided Manufacturing Planning (CAMP)of Mass Customization for Non-rotational Part Production." Link to electronic dissertation, 2003. http://www.wpi.edu/Pubs/ETD/Available/etd-1216103-153523/.

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Dissertation (Ph.D.) -- Worcester Polytechnic Institute.<br>Keywords: Computer aided manufacturing planning; Object-oriented systems analysis (OSA); Feature; manufacturing resource capability; setup planning; multi-part fixture Includes bibliographical references (p.146-154).
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Jelínek, Dan. "Výroba pouzdra zapalování." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-416607.

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The thesis deals with the design of the production of Ignition case. Component is a hollow cover of one channel ignition device, produced by the PBS Velká Bíteš company. It has a constant wall thickness of 0,5 mm and production rate is 15 000 pieces per year. Technology of deep drawing with solid forming tool was picked out of several considered production variants. DC05 deep drawing steel is the material of choice. Based on technological calculations, number of drawing operations needed and forming force was established. Based on those parameters, hydraulic press ZH 10 produced by the Presshy
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Čudová, Monika. "Výroba odvíčkovací vaničky." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-318406.

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The project elaborated design of technology production of the extract - tray made of stainless steel 17 240. Based on literary study of deep drawing together with calculations, was designed drawing in instrument with holder. The drawing instrument make use of standardised components and it is solving forms to make up stand fitting to hydraulic press CYS 320, with nominal tensile force 3200 kN. Drawing punch and drawing die are produced from high alloyed steel 19 573 heat-worked according to drawing documentation.
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Vašíček, Jan. "Výroba napáječky." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-417132.

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The diploma thesis of the master's study in the field of M2I-K presents a design of a hollow rotating part made of metal sheet with a tapering bottom. Deep drawing technology was chosen as the best suited option for production without thinning the wall. Stainless steel was chosen as a source material for production parts in compliance to ČSN 172 40. The drinker is produced by three drawing operations where each operation is performed separately on a standalone press CTH 250 developed by ŽĎAS a. s. A sheet measuring 1500 x 3000 x 1 mm with diameter 428 mm was evaluated as the most economically
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Šupa, Jan. "Výroba olejové vany." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-241870.

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The dissertation deals with a suggestion of the production of an oil pan into the car with a deep drawing. The part will be produced out of a deep drawed steel plate – class 11 305 (DC04). On the basis of a calculation and the study of the corresponding literature about the deep drawing a reverse drawing in a convention tools with a blank holder has been suggested. The part of the machine will be also an upper ejector for the fall of a sticking of a drawn part in the die. As a semi-product a blank has been chosen, which is burned out from the piece of plate with the dimension of 2500 x 12500 m
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Fidan, Tahir. "Feature Based Design Of Rotational Parts Based On Step." Master's thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/12605632/index.pdf.

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The implicit and low-level part definition data, provided by geometric modeling cannot be used by downstream applications. Therefore, feature based modeling concept has been introduced to integrate CAD and downstream applications. However, due to the lack of implicit and explicit standard representations for features and unmanageable number of possible predefined features without standardization, feature based modeling approach has proved to be inadequate. STEP AP224 provides a standard for both implicit and explicit representations for manufacturing features. This thesis presents STEP AP224 f
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Rosso, Roberto Silvio Ubertino. "STEP compliant CAD/CAPP/CAM system for rotational asymmetric parts." Thesis, Loughborough University, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.421919.

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O'Brien, E. "Rotational moulding of a class A finish on plastic parts." Thesis, Queen's University Belfast, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.395216.

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Tavakoli, Bina Alireza. "Feature based workshop oriented NC planning for asymmetric rotational parts." Thesis, Loughborough University, 1993. https://dspace.lboro.ac.uk/2134/25050.

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This thesis describes research which is aimed at devising a framework for a feature based workshop oriented NC planning. The principal objective of this thesis is to utilize a feature based method which can rationalize and enhance part description and in particular part planning and programming on the shop-floor. This work has been done taking into account new developments in the area of shop floor programming. The importance of the techniques and conventions which are addressed in this thesis stems from the recognition that the most effective way to improve and enhance part description is to
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Ozsuer, Erhan. "Development Of A Web-based Manufacturing Application System For Rotational Parts." Master's thesis, METU, 2003. http://etd.lib.metu.edu.tr/upload/1059930/index.pdf.

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Developing process plans and part programs rapidly and correctly for CNC machine tools plays a vital role in manufacturing. This study is concerned with the development of a web-enabled virtual design and manufacturing application system for rotational parts. The object oriented methodology is used in the application development. Windows Distributed interNet Application (DNA) architecture which describes a framework of building software technologies in an integrated web and client-server model of computing, is employed in the system. The entire system was modeled with Unified Modeling Language
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Books on the topic "Rotational part"

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Politics of rotational presidency and the survival of Nigeria. Ahmadu Bello University Press, 2010.

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Baldwin, John R. (John Russel), 1945-. Concurrence industrielle, évolution des parts de marché et croissance de la productivité. Statistique Canada, 2004.

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S, Makushkin I͡U︡, Ulenikov O. N та Kabanov Mikhail Vsevolodovich, ред. Kolebatelʹno-vrashchatelʹnai͡a︡ spektroskopii͡a︡ vodi͡a︡nogo para. "Nauka," Sibirskoe otd-nie, 1989.

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Rotation und Verfassungsrecht: Überlegungen zur verfassungsrechtlichen Zulässigkeit der Auswechselung von Mandatsträgern aufgrund von Parteibeschlüssen. P. Lang, 1989.

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High, Quality Forestry Workshop (1993 Silver Falls State Park Or ). High Quality Forestry Workshop: The idea of long rotations : Silver Falls State Park, Oregon, May 10-12, 1993 : proceedings. Center for International Trade in Forest Products, University of Washington, 1994.

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High Quality Forestry Workshop (1993 Silver Falls State Park, Or.). High Quality Forestry Workshop: The idea of long rotations : Silver Falls State Park, Oregon, May 10-12, 1993 : proceedings. Center for International Trade in Forest Products, University of Washington, 1994.

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Coppice, looking beyond setaside (Conference) (1994 Stoneleigh Park). Short rotation coppice: Looking beyond set-aside : proceedings from Coppice, looking beyond setaside : [held] 25th October 1994 at the Conference Hall, National Agricultural Centre, Stoneleigh Park, Warwickshire. [RASE], 1994.

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Caplovitz, Gideon Paul, Po-Jang Hsieh, Peter J. Kohler, and Katharine B. Porter. The Spinning Ellipse Speed Illusion. Oxford University Press, 2017. http://dx.doi.org/10.1093/acprof:oso/9780199794607.003.0013.

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The Spinning Ellipse Speed Illusion is an illusion of perceived speed in which a low-aspect ratio “fat” ellipse will appear to rotate more slowly than a higher-aspect ratio “skinny” ellipse that is rotating at the same speed. This illusory percept can be observed when the ellipses are defined by luminance, color, relative motion, and dotted contours and across a wide range of rotational speeds and eccentricities. The illusion is not limited to rotating ellipses and can be observed with different-shaped contours as well. The Spinning Ellipse Speed Illusion illustrates that the perceived speed o
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Power Mechanisms of Rotational and Cyclic Motions. Taylor & Francis Group, 2015.

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Klebanov, Boris M., and Morel Groper. Power Mechanisms of Rotational and Cyclic Motions. Taylor & Francis Group, 2015.

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Book chapters on the topic "Rotational part"

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Yagishita, H. "Improving Gear Hobbing Machine Drive Systems by Computer-Aided Design Part I: Computational analysis of torsional rigidity for rotational transmission mechanism." In Proceedings of the Twenty-Sixth International Machine Tool Design and Research Conference. Macmillan Education UK, 1986. http://dx.doi.org/10.1007/978-1-349-08114-1_29.

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Lamb, S. "Rotations About Vertical Axes in Part of the New Zealand Plate-Boundary Zone, Theory and Observation." In Paleomagnetic Rotations and Continental Deformation. Springer Netherlands, 1989. http://dx.doi.org/10.1007/978-94-009-0869-7_28.

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Ivins, Erik R. "New Aspects of Rotational Dynamics Within the North American-Pacific Ductile Shear Zone." In Deep Structure and Past Kinematics of Accreted Terranes. American Geophysical Union, 2013. http://dx.doi.org/10.1029/gm050p0179.

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Bibanda, B., P. H. Cohen, and C. Tunasar. "FIXPERT: A rule-based system for workholding device selection of rotational parts." In Handbook of Expert Systems Applications in Manufacturing Structures and rules. Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-011-0703-7_14.

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Blessing, G. V., M. A. Donmez, D. G. Eitzen, and R. H. Kodama. "In-Process Ultrasonic Thickness Metrology Applied to Steel Parts of Rotation." In Review of Progress in Quantitative Nondestructive Evaluation. Springer US, 1991. http://dx.doi.org/10.1007/978-1-4615-3742-7_133.

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Kalta, M., X. Q. Tang, and B. J. Davies. "Cadexcap and Inspex: The Integration of Expert Process Planning Machining and Inspection for Rotational Parts." In Proceedings of the Twenty-Ninth International Matador Conference. Macmillan Education UK, 1992. http://dx.doi.org/10.1007/978-1-349-12433-6_16.

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Uluer, M. Ural, H. Özgür Ünver, Kadir Akkuş, and S. Engin Kılıç. "A Model for Predicting Theoretical Process Energy Consumption of Rotational Parts Using STEP AP224 Features." In Re-engineering Manufacturing for Sustainability. Springer Singapore, 2013. http://dx.doi.org/10.1007/978-981-4451-48-2_23.

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DUMORTIER, Freddy. "On the structure of germs of vector fields in ℝ3 whose linear part generates rotations." In Lecture Notes in Mathematics. Springer Berlin Heidelberg, 1985. http://dx.doi.org/10.1007/bfb0075633.

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Domazet, D., and M. Manic. "Cadrot: A Product Modeller and Cad Module for Integrated Cad/Capp/Cam Systems for Rotational Parts." In Proceedings of the Twenty-eighth International. Macmillan Education UK, 1990. http://dx.doi.org/10.1007/978-1-349-10890-9_32.

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Golden, Leslie M. "Experiment 9 Determination of the Rotation Rate of Planets and Asteroids by Radar: Part I. Observations of Mercury." In Laboratory Experiments in Physics for Modern Astronomy. Springer New York, 2012. http://dx.doi.org/10.1007/978-1-4614-3311-8_9.

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Conference papers on the topic "Rotational part"

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Kim, Jisu, Jeonghyun Baek, and Euntai Kim. "A part-based rotational invariant hand detection." In 2013 International Conference on Fuzzy Theory and Its Applications (iFUZZY). IEEE, 2013. http://dx.doi.org/10.1109/ifuzzy.2013.6825422.

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Rho, H. M., and D. Sheen. "A Part Feature Description Model for Process Planning of Rotational Parts." In ASME 1989 Design Technical Conferences. American Society of Mechanical Engineers, 1989. http://dx.doi.org/10.1115/detc1989-0023.

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Abstract This study documents the development of the Automated Process And Sequence Selector (APASS) model and associated computer software. APASS can be effectively used to automate the selection of machine tools for rotational parts during the process planning procedure for these parts. The APASS model bases its machine tool decisions on part feature description, such as surface shape, technical information! and part header information. Data on the surface shape are transformed automatically based on conversion tables to output suggested machining processes and machine tools. These processes
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Karnik, Mukul, Satyandra K. Gupta, and Edward B. Magrab. "Geometric Containment Analysis for Rotational Parts." In ASME 2004 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/detc2004-57271.

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This paper describes a system and underlying algorithms to perform geometric containment analysis to determine if a newly designed rotational part can be manufactured from a part in an existing database of rotational parts. Only material removal of the database part is considered in order to obtain the newly designed part from the database part. The system uses a three-step algorithm to test for containment. The first step analyzes feasibility of containment using bounding cylinders. If the bounding cylinder of the query part is bigger than the part in the database, then the database part cann
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Manolescu, Alexandru, Adriana Fota, and Gheorghe Oancea. "Recognizing Algorithm for Digitized Rotational Parts." In ASME 2012 11th Biennial Conference on Engineering Systems Design and Analysis. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/esda2012-82334.

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It is a well known fact that Reverse Engineering techniques involve the following steps: scanning the object, pre-processing a cloud of points, processing the cloud of points, redesigning, and manufacturing the part. Difficulties arise when processing clouds of points resulted from digitization, obtaining geometrical parameters of the scanned object itself and getting the final associated CAD model. This paper presents an algorithm for the recognition of a rotational part form. The part has been previously scanned and will be redesigned for re-manufacturing. To determine the surfaces of a rota
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Müller, Matthias, Jan Bender, Nuttapong Chentanez, and Miles Macklin. "A robust method to extract the rotational part of deformations." In MiG '16: Motion In Games. ACM, 2016. http://dx.doi.org/10.1145/2994258.2994269.

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Owen, Andrew, Robert McMahon, R. Woods, and Brian Esselman. "PREDICTING CORIOLIS VIBRATION-ROTATION COUPLING COEFFICIENTS FOR ANALYSIS OF ROTATIONAL SPECTRA, PART 1: THEORY AND IMPLEMENTATION." In 2020 International Symposium on Molecular Spectroscopy. University of Illinois at Urbana-Champaign, 2020. http://dx.doi.org/10.15278/isms.2020.mk04.

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Chong, Colin, Kiyoshi Sogabe, and Kosuke Ishii. "Simultaneous Computer-Aided Design of Rotational Plastic Parts." In ASME 1993 International Computers in Engineering Conference and Exposition. American Society of Mechanical Engineers, 1993. http://dx.doi.org/10.1115/cie1993-0018.

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Abstract This paper addresses the problem of balancing rotational plastic parts during the early stages of design. The study develops an interactive methodology that uses a solid modeling CAD system and considers injection molding concerns simultaneously with static and dynamic balance. The Transfer Matrix Method evaluates the dynamic characteristics by predicting the approximate critical speed of the part. Design Compatibility Analysis (DCA) checks for injection molding guidelines. Using these evaluation modules interactively, designers can develop a functional and manufacturable part quickly
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Owen, Andrew, Robert McMahon, R. Woods, and Brian Esselman. "PREDICTING CORIOLIS VIBRATION-ROTATION COUPLING COEFFICIENTS FOR ANALYSIS OF ROTATIONAL SPECTRA, PART 2: DISCUSSION AND COMPARISON TO EXPERIMENT." In 2020 International Symposium on Molecular Spectroscopy. University of Illinois at Urbana-Champaign, 2020. http://dx.doi.org/10.15278/isms.2020.rj10.

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Lipkin, Harvey, and Timothy Patterson. "Geometrical Properties of Modelled Robot Elasticity: Part I — Decomposition." In ASME 1992 Design Technical Conferences. American Society of Mechanical Engineers, 1992. http://dx.doi.org/10.1115/detc1992-0213.

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Abstract A new geometric decomposition is introduced that diagonalizes the 6 × 6 stiffness and compliance matrices which model robot elasticity. Using screw theory, a congruence transformation is developed from the three orthogonal wrench-compliant axes and the three orthogonal twist-compliant axes. The diagonal elements are the stationary values of linear and rotational compliance and stiffness. This generalizes and is analogous to principal axes and principal values for stress, strain, and rotational inertia. It is proved that the decomposition always exists for both the nonsingular and sing
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Owen, J. Michael, Oliver Pountney, and Gary Lock. "Prediction of Ingress Through Turbine Rim Seals: Part 2—Combined Ingress." In ASME Turbo Expo 2010: Power for Land, Sea, and Air. ASMEDC, 2010. http://dx.doi.org/10.1115/gt2010-23349.

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In Part1 of this two-part paper, the orifice equations were solved for the case of externally-induced ingress, where the effects of rotational speed are negligible. In Part 2, the equations are solved, analytically and numerically, for combined ingress (CI) where the effects of both rotational speed and external flow are significant. For the CI case, the orifice model requires the calculation of three empirical constants, including Cd,e,RI and Cd,e,EI, the discharge coefficients for rotationally-induced (RI) and externally-induced (EI) ingress. For the analytical solutions, the external distri
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Reports on the topic "Rotational part"

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Fehey, Kristina, and Dustin Perkins. Invasive exotic plant monitoring in Capitol Reef National Park: 2019 field season, Scenic Drive and Cathedral Valley Road. Edited by Alice Wondrak Biel. National Park Service, 2021. http://dx.doi.org/10.36967/nrr-2286627.

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Invasive exotic plant (IEP) species are a significant threat to natural ecosystem integrity and biodiversity, and controlling them is a high priority for the National Park Service. The North-ern Colorado Plateau Network (NCPN) selected the early detection of IEPs as one of 11 monitoring protocols to be implemented as part of its long-term monitoring program. From May 30 to June 1, 2019, network staff conducted surveys for priority IEP species along the Scenic Drive and Cathedral Valley Road monitoring routes at Capitol Reef National Park. We detected 119 patches of six priority IEP species alo
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Wilson, D., Daniel Breton, Lauren Waldrop, et al. Signal propagation modeling in complex, three-dimensional environments. Engineer Research and Development Center (U.S.), 2021. http://dx.doi.org/10.21079/11681/40321.

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The Signal Physics Representation in Uncertain and Complex Environments (SPRUCE) work unit, part of the U.S. Army Engineer Research and Development Center (ERDC) Army Terrestrial-Environmental Modeling and Intelligence System (ARTEMIS) work package, focused on the creation of a suite of three-dimensional (3D) signal and sensor performance modeling capabilities that realistically capture propagation physics in urban, mountainous, forested, and other complex terrain environments. This report describes many of the developed technical capabilities. Particular highlights are (1) creation of a Java
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3

Tweet, Justin S., Vincent L. Santucci, Kenneth Convery, Jonathan Hoffman, and Laura Kirn. Channel Islands National Park: Paleontological resource inventory (public version). National Park Service, 2020. http://dx.doi.org/10.36967/nrr-2278664.

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Abstract:
Channel Island National Park (CHIS), incorporating five islands off the coast of southern California (Anacapa Island, San Miguel Island, Santa Barbara Island, Santa Cruz Island, and Santa Rosa Island), has an outstanding paleontological record. The park has significant fossils dating from the Late Cretaceous to the Holocene, representing organisms of the sea, the land, and the air. Highlights include: the famous pygmy mammoths that inhabited the conjoined northern islands during the late Pleistocene; the best fossil avifauna of any National Park Service (NPS) unit; intertwined paleontological
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Formation of a deficit-free balance of soil humus as a necessary condition for improving crop rotation in the forest-steppe zone of the European part of the Russian Federation. FGBOU VO Kursk State Agricultural Academy, Journal Bulletin of the Kursk State Agricultural Academy, 2020. http://dx.doi.org/10.18411/issn1997-0749.2020-05-01.

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