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Relevant bibliographies by topics / Curvilinear measurements

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Academic literature on the topic 'Curvilinear measurements'

Author: Grafiati

Published: 10 December 2022

Last updated: 28 January 2023

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Journal articles on the topic "Curvilinear measurements"

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Pirk, Norbert, Mikhail Mastepanov, Frans-Jan W. Parmentier, Magnus Lund, Patrick Crill, and Torben R. Christensen. "Calculations of automatic chamber flux measurements of methane and carbon dioxide using short time series of concentrations." Biogeosciences 13, no. 4 (2016): 903–12. http://dx.doi.org/10.5194/bg-13-903-2016.

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Abstract. The closed chamber technique is widely used to measure the exchange of methane (CH4) and carbon dioxide (CO2) from terrestrial ecosystems. There is, however, large uncertainty about which model should be used to calculate the gas flux from the measured gas concentrations. Due to experimental uncertainties the simple linear regression model (first-order polynomial) is often applied, even though theoretical considerations of the technique suggest the application of other, curvilinear models. High-resolution automatic chamber systems which sample gas concentrations several hundred times

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Hopkins, DL. "An evaluation of the Hennessy Grading Probe for measuring fat depth in beef carcasses." Australian Journal of Experimental Agriculture 29, no. 6 (1989): 781. http://dx.doi.org/10.1071/ea9890781.

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Fat depth at the P8 site on the rump was measured by the cut-and-measure (CM) technique and with the Hennessy Grading Probe (HGP) on 2501 beef carcasses at 1 abattoir over a 12-month period. CM measurements that differed by more than 1 mm between the right and left sides of the carcass were discarded. A subsequent data set of 1850 carcasses was randomly divided so that 2 models could be developed to assess the general validity of the relationship between the 2 methods of measurement. Analysis of measurements of the left side of the carcasses of these 2 subsamples showed the data were not norma

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Magdziak, Marek. "Selection of the Best Model of Distribution of Measurement Points in Contact Coordinate Measurements of Free-Form Surfaces of Products." Sensors 19, no. 24 (2019): 5346. http://dx.doi.org/10.3390/s19245346.

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The article presents a new method for determining the distribution of measurement points, which can be used in the case of contact coordinate measurements of curvilinear surfaces of products. The developed method is based on multi-criteria decision analysis. In the case of the new method, the selection of the distribution of measurement points on free-form surfaces is carried out based on the analysis of five different criteria. The selection of the best model of the distribution of measurement points results from the accuracy of coordinate measurements, the time needed to complete measurement

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Werner, Andrzej. "Evaluation of the degree of fitting of a curvilinear hole and stub machined on a CNC milling center." Mechanik 92, no. 12 (2019): 781–83. http://dx.doi.org/10.17814/mechanik.2019.12.108.

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The method of evaluating the accuracy of fitting a curvilinear hole-stub pair is presented. The next stages of the process were presented, including: machining of elements, coordinate measurements of machined parts, analysis of measurement results. A method to improve the degree of fitting of the hole-stub pair is proposed.

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Magdziak, Marek. "A New Method of Distribution of Measurement Points on Curvilinear Surfaces of Products." Sensors 19, no. 12 (2019): 2667. http://dx.doi.org/10.3390/s19122667.

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The article presents the method of selecting scanning lines along which coordinate measurements, performed by using, e.g., a coordinate measuring machine working in the single point probing mode, of free-form surfaces of measured workpieces may be conducted. Additionally, the proposed method supports the user of a coordinate measuring system during defining the number of measurement points distributed along selected scanning lines, thus deciding on the final distribution of measurement points on a measured surface of a product. The proposed method enables distributing measurement points in the

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Magdziak, Marek, and Dominika Ziaja. "Software Dedicated to Determining a Strategy of Coordinate Measurements." Materials Science Forum 957 (June 2019): 179–86. http://dx.doi.org/10.4028/www.scientific.net/msf.957.179.

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The paper presents the developed software dedicated to determining a measurement strategy of contact coordinate measurements conducted by using coordinate measuring machines. The created software enables to calculate locations of the scanning lines along free-form surfaces of measured workpieces. The presented program was developed by using the MATLAB software. The created program was tested based on the selected examples of curvilinear surfaces. Measurement points were located in the parts of surfaces characterized by the biggest form deviations resulting from machining processes. The calcula

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Morianou, G. G., N. N. Kourgialas, G. P. Karatzas, and N. P. Nikolaidis. "River flow and sediment transport simulation based on a curvilinear and rectilinear grid modelling approach – a comparison study." Water Supply 17, no. 5 (2017): 1325–34. http://dx.doi.org/10.2166/ws.2017.031.

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In the present work, a two-dimensional (2D) hydraulic model was used for the simulation of river flow and sediment transport in the downstream section of the Koiliaris River Basin in Crete, Greece, based on two different structured grids. Specifically, an important goal of the present study was the comparison of a curvilinear grid model with a rectilinear grid model. The MIKE 21C model has been developed to simulate 2D flows and morphological changes in rivers by using either an orthogonal curvilinear grid or a rectilinear grid. The MIKE 21C model comprises two parts: (a) the hydrodynamic part

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Pirk, N., M. Mastepanov, F. J. W. Parmentier, M. Lund, P. Crill, and T. R. Christensen. "Calculations of automatic chamber flux measurements of methane and carbon dioxide using short time series of concentrations." Biogeosciences Discussions 12, no. 17 (2015): 14593–617. http://dx.doi.org/10.5194/bgd-12-14593-2015.

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Abstract. The closed chamber technique is widely used to measure the exchange of methane (CH4) and carbon dioxide (CO2) from terrestrial ecosystems. There is, however, large uncertainty about which model should be used to calculate the gas flux from the measured gas concentrations. Due to experimental uncertainties the robust linear regression model (first order polynomial) is often applied, even though theoretical considerations of the technique suggest the application of other, curvilinear models. High-resolution automatic chamber systems which sample gas concentrations several hundred times

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Toner, Mary Ann, Floyd W. Emanuel, and Donald Parker. "Relationship of Spectral Noise Levels to Psychophysical Scaling of Vowel Roughness." Journal of Speech, Language, and Hearing Research 33, no. 2 (1990): 238–44. http://dx.doi.org/10.1044/jshr.3302.238.

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Direct magnitude estimation (DME) and equal-appearing interval (EAI) ratings of perceived roughness and spectral noise level (SNL) measurements of isolated sustained vowel samples (/a/ and /i/) were obtained. The linear and curvilinear relationships between the resulting roughness ratings and SNL were then examined. In the present study, the comparison between the two models resulted in conflicting evidence regarding the model that best described the relationship between roughness ratings and SNL measurements. In all comparisons, however, a significant linear component was indicated. Additiona

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Werner, Andrzej. "Correction of machining deviations of 2D profiles described with NURBS curves." Mechanik 91, no. 8-9 (2018): 716–18. http://dx.doi.org/10.17814/mechanik.2018.8-9.113.

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The method of correction of machining of curvilinear profiles is presented. This method is based on the use of coordinate measurements of the pre-manufactured object. The results of the measurements contain information about the observed machining deviations. These data are used in the reconstruction of the geometric model of the produced profile.

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Dissertations / Theses on the topic "Curvilinear measurements"

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Naser-ud-Din, Shazia. "Analysis and correlation study of human masseter muscle with EMG, ultrasonography & 3D imaging." Thesis, 2009. http://hdl.handle.net/2440/63322.

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Form and function are inextricably intertwined in orthodontics. Our understanding of the hard tissue relationship has been comprehensive, with extensive clinical trials both cross sectional and longitudinal over the past several decades. The majority of studies have used standardized cephalograms that reflect our current concepts. However, the same cannot be stated for soft tissues and, more specifically, the muscles that envelope the skeletal bases. The aim of the current study was to objectively evaluate the masseter muscle – one of the key elevator muscles in the human masticatory system wi

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"Analysis, Design and Measurements of Flat and Curved Circularly Symmetric High Impedance Surfaces for Curvilinear Antenna Applications." Doctoral diss., 2018. http://hdl.handle.net/2286/R.I.50566.

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abstract: In this dissertation a new wideband circular HIS is proposed. The circular periodicity made it possible to illuminate the surface with a cylindrical TEMz wave and; a novel technique is utilized to make it wideband. Two models are developed to analyze the reflection characteristics of the proposed HIS. The circularly symmetric high impedance surface is used as a ground plane for the design of a low-profile loop and spiral radiating elements. It is shown that a HIS with circular periodicity provides a wider operational bandwidth for curvilinear radiating elements such, such as loops

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Books on the topic "Curvilinear measurements"

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United States. National Ocean Service. Coastal and Estuarine Oceanography Branch, ed. Orthogonal curvilinear grid generation [for Tampa Bay]. U.S. Dept. of Commerce, National Oceanic and Atmospheric Administration, National Ocean Service, Office of Ocean and Earth Sciences, Marine Analysis and Interpretation Division, Coastal and Estuarine Oceanography Branch, 1995.

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Book chapters on the topic "Curvilinear measurements"

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Styner, Martin, Thomas Coradi, and Guido Gerig. "Brain Morphometry by Distance Measurement in a Non-Euclidean, Curvilinear Space." In Lecture Notes in Computer Science. Springer Berlin Heidelberg, 1999. http://dx.doi.org/10.1007/3-540-48714-x_30.

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Streekstra, G. J., A. W. M. Smeulders, and R. van den Boomgaard. "Tracing of Curvilinear Structures in 3D Images with Single Scale Diameter Measurement." In Scale-Space Theories in Computer Vision. Springer Berlin Heidelberg, 1999. http://dx.doi.org/10.1007/3-540-48236-9_50.

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Streekstra, G. J., R. van den Boomgaard, and A. W. M. Smeulders. "Scale Dependent Differential Geometry for the Measurement of Center Line and Diameter in 3D Curvilinear Structures." In Computer Vision - ECCV 2000. Springer Berlin Heidelberg, 2000. http://dx.doi.org/10.1007/3-540-45054-8_56.

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Andrade-Valbuena, Nelson A., and Gonzalo R. Llanos-Herrera. "Why Are There Discrepancies in the Results of Entrepreneurial Orientation and Its Impact on a Firm's Performance?" In Practice, Progress, and Proficiency in Sustainability. IGI Global, 2022. http://dx.doi.org/10.4018/978-1-7998-9301-1.ch017.

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Entrepreneurial orientation (EO) and its relationship to a firm's performance is a topic of substantial interest among scholars in different contexts. To date, however, literature on the subject has reported conflicting results and inconclusive evidence in studies relating entrepreneurial orientation to a firm's performance. In this sense, the authors have reviewed the literature and found that diverse opinions regarding definitions, scales of measurement and modeling of the construct, and its dimensions have led to conflicts within empirical research. They have also reviewed studies that have highlighted curvilinear relationships between EO and performance. This summary of issues highlighted in previous reviews serves as a guideline when addressing research on EO, contributing to the general discussion in strategic entrepreneurship literature about this important subject.

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Conference papers on the topic "Curvilinear measurements"

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Kumar, Surya, and Andallib Tariq. "ESTIMATION OF TRANSIENT CONTACT HEAT TRANSFER BETWEEN CURVILINEAR SURFACES BY INFRARED THERMOGRAPHY MEASUREMENTS." In Proceedings of the 24th National and 2nd International ISHMT-ASTFE Heat and Mass Transfer Conference (IHMTC-2017). Begellhouse, 2018. http://dx.doi.org/10.1615/ihmtc-2017.680.

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Gal, Alicia M., Travis Douglas, Adrian D. C. Chan, and Dean C. Hay. "Potential for autonomous linear, curvilinear, and phase detection in natural context para skating using IMU sledge motion data." In 2020 IEEE International Symposium on Medical Measurements and Applications (MeMeA). IEEE, 2020. http://dx.doi.org/10.1109/memea49120.2020.9137225.

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HOSODA, TAKASHI, NOBUHISA NAGATA, ICHIRO KIMURA, KOJI MICHIBATA, and MICHIAKI IWATA. "A DEPTH AVERAGED MODEL OF OPEN CHANNEL FLOWS WITH LAG BETWEEN MAIN FLOWS AND SECONDARY CURRENTS IN A GENERALIZED CURVILINEAR COORDINATE SYSTEM." In Proceedings of the 8th International Symposium on Flow Modeling and Turbulence Measurements. WORLD SCIENTIFIC, 2002. http://dx.doi.org/10.1142/9789812777591_0007.

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Borazjani, Iman, Liang Ge, Fotis Sotiropoulos, Lakshmi Prasad Dasi, and Ajit Yogonathan. "Fluid-Structure Interaction in Bi-Leaflet Mechanical Heart Valves." In ASME 2007 2nd Frontiers in Biomedical Devices Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/biomed2007-38074.

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In this work we focus on the fluid-structure interaction (FSI) problem of a St. Jude Regent 23mm bi-leaflet mechanical heart valve (BMHV) implanted in modeled straight aorta geometry with a simplified sinus. A FSI solver based on a recently developed curvilinear grid/immersed boundary method fluid flow solver is developed. The current numerical simulation focuses on the acceleration phase within the cardiac cycle when the leaflets are opening following the incoming flow. The simulated results are compared with experimental data with regard to the leaflet kinematics as well as valve induced wak

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Jin, P., and R. J. Goldstein. "Local Mass/Heat Transfer on Turbine Blade Near-Tip Surfaces." In ASME Turbo Expo 2002: Power for Land, Sea, and Air. ASMEDC, 2002. http://dx.doi.org/10.1115/gt2002-30556.

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Local mass transfer measurements on a simulated high pressure turbine blade are conducted in a linear cascade with tip clearance, using a naphthalene sublimation technique. The effects of tip clearance (0.86%–6.90% of chord), are investigated at an exit Reynolds number of 5.8 × 105 and a low turbulence intensity of 0.2%. The effects of the exit Reynolds number (4–7 × 105) and the turbulence intensity (0.2% and 12.0%) are also measured for the smallest tip clearance. The effect of tip clearance on the mass transfer on the pressure surface is limited to 10% of the blade height from the tip at sm

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Gran, Inge R., M. C. Melaaen, and F. Magnussen. "Numerical Simulation of Fluid Flow and Combustion in Gas Turbine Combustors." In ASME 1993 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1993. http://dx.doi.org/10.1115/93-gt-166.

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The finite-volume approach together with body-fitted curvilinear non-orthogonal coordinates and a non-staggered grid arrangement is used for investigating turbulent reacting flows inside gas turbine combustion chambers. The computational grids are generated by solving elliptic differential equations, permitting an accurate description of the complex geometry of commercial gas turbine combustors. Different combustion models are briefly discussed with a view to their suitability for practical combustor predictions. The k-ε model and the Eddy Dissipation Concept are selected to account for the tu

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Prasanna, D., and K. Aung. "Numerical Solutions of Single and Multiple Laminar Jets." In ASME 2005 Fluids Engineering Division Summer Meeting. ASMEDC, 2005. http://dx.doi.org/10.1115/fedsm2005-77079.

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Modern power plants discharge approximately 1.5 to 2kWhr of waste heat for every kWhr of electrical energy produced. Modern power plants discharge approximately 1.5 to 2kWhr of waste heat for every kWhr of electrical energy produced. Usually this heat is discharged to an adjacent water body which increases the water temperature near the outfall. In order to assess the ecological consequences of waste heat discharge one must first know the physical changes (temperature, velocity, salinity) induced by these discharges. It is with this later aspect, prediction of physical properties, that the cur

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Peterson, Michael “Mick”, and Miao Sun. "Stochastic Properties of Anisotropic Materials." In ASME 2001 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/imece2001/nde-25813.

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Abstract Extensive research has been directed toward the development of methods for the optimal recovery of elastic properties from ultrasonic measurements. For a number of applications both the elastic and damping characteristics of the materials are required in design. The use of the optimal recovery does present challenges when applied to either man-made or natural anisotropic materials. In many cases manufacturing variability results in a need for a statistical description of the elastic and damping properties. In addition, errors in material lay-up or growth patterns may result in mis-ori

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Martinez-Botas, R. F., K. R. Pullen, and F. Shi. "Numerical Calculations of a Turbine Volute Using a 3-D Navier-Stokes Solver." In ASME 1996 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1996. http://dx.doi.org/10.1115/96-gt-066.

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The turbine volute is a complex flow device, about which a few papers on both measurements and CFD predictions have appeared. The main reasons for the difficulties being the complicated geometry which hinders measurements to be taken by both intrusive and non-intrusive techniques, and makes the numerical predictions difficult. In this paper, the complex three-dimensional flow through a turbine volute with non-symmetric circular cross-section is studied by using a 3-D Navier-Stokes solver which has been developed by the authors. In this solver, the fully 3-D Reynolds averaged N-S equations coup

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Marko, J. R., and D. B. Fissel. "Marine Ice Profiling: Future Directions." In SNAME 7th International Conference and Exhibition on Performance of Ships and Structures in Ice. SNAME, 2006. http://dx.doi.org/10.5957/icetech-2006-166.

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Upward-looking sonars moored on the sea floor have contributed to our qualitative and quantitative understandings of ocean ice covers by enabling quasi-continuous measurements of ice draft along curvilinear tracks to accuracies as great as 0.05 m. The capabilities of ASL’s own IPS4 instrument to acquire and store such data has been demonstrated in well over 100 deployments in polar and sub-polar ice-infested regions. Data obtained from these deployments has providing ice property and characterization information for platform and operations design, planning, navigation support and for scientifi

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