Relevant bibliographies by topics / Volumetric accuracy

Contents

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

Academic literature on the topic 'Volumetric accuracy'

Author: Grafiati
Published: 4 June 2021
Last updated: 15 February 2022

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Journal articles on the topic "Volumetric accuracy"

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Hoyt, Kenneth, Felix A. Hester, Randall L. Bell, Mark E. Lockhart, and Michelle L. Robbin. "Accuracy of Volumetric Flow Rate Measurements." Journal of Ultrasound in Medicine 28, no. 11 (November 2009): 1511–18. http://dx.doi.org/10.7863/jum.2009.28.11.1511.

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Park, Cheol-Woo, Jin-ho Kim, Yu-Kyeong Seo, Sae-Rom Lee, Ju-Hee Kang, Song-Hee Oh, Gyu-Tae Kim, Yong-Suk Choi, and Eui-Hwan Hwang. "Volumetric accuracy of cone-beam computed tomography." Imaging Science in Dentistry 47, no. 3 (2017): 165. http://dx.doi.org/10.5624/isd.2017.47.3.165.

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STULL, JILL C., PHILIP J. SCHNEIDER, ALLEN ERENBERG, and RICHARD D. LEFF. "Decreased flow accuracy from volumetric infusion pumps." Critical Care Medicine 17, no. 9 (September 1989): 926–28. http://dx.doi.org/10.1097/00003246-198909000-00018.

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Sarina, Shuyou Zhang, and Jinghua Xu. "Transmission system accuracy optimum allocation for multiaxis machine tools’ scheme design." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 227, no. 12 (March 25, 2013): 2762–79. http://dx.doi.org/10.1177/0954406213479723.

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Transmission components are the main mechanical elements in a machine system, the accuracy level of the transmission system is one of the major sources of the machining error of multiaxis machine tools. This article investigates motion error analysis, volumetric motion error model for transmission system and the accuracy allocation method for multiaxis machine tools during the early design stage. For this purpose, a transmission system volumetric motion error model, which is based on the motion error matrix and screw theory, is derived for mapping transmission components’ error parameters to the volumetric motion errors of machine tools. The volumetric motion error matrix combines motion errors along the machine tools’ kinematic chains. Subsequently, the volumetric motion error model is expressed as a volumetric motion error twist, which is formulated from the volumetric motion error matrix. Additionally, the transmission system volumetric motion error twist model is used as design criteria for accuracy optimum allocation, with constraints on the twist magnitude and design variable limits. Then, design optimization is performed by using a multiobjective nonlinear optimization technique to minimize the manufacturing cost and volumetric motion error twist pitch. To solve this multiple objective optimum problem, this study proposes an approach integrating Lagrange multiplier and gradient descent operator with non-dominated sorting genetic algorithm-II (NSGA-II). Modified non-dominated sorting genetic algorithm-II searches for an allocation scheme Pareto optimal front. Consequently, VlseKriterijumska Optimizacija I Kompromisno Resenje (VIKOR) determines the best compromise solution from the Pareto set. Finally, a numerical experiment for the optimal design of a numerical control machine tool is conducted, which highlights the advantages of the proposed methodology.
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Guo, Qian Jian, Qing Wen Qu, and Jian Guo Yang. "Application of Ant Colony Algorithm to Volumetric Thermal Error Modeling and Compensation of a CNC Machine Tool." Applied Mechanics and Materials 170-173 (May 2012): 3487–90. http://dx.doi.org/10.4028/www.scientific.net/amm.170-173.3487.

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Volumetric errors are the major contributor to the dimensional errors of a workpiece in precision machining. Error compensation technique is a cost-effective way to reduce volumetric errors. Accurate modeling of volumetric errors is a prerequisite of error compensation. In this paper, a volumetric error model was proposed by using neural networks based on ant colony algorithm. Finally, a volumetric error compensation system was developed based on the proposed model, and which has been applied to a CNC machine tool in daily production. The results show that the volumetric errors are reduced and the machining accuracy of the machine tool is improved.
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Liu, Yi Lei, Dong Gao, and Gang Wei Cui. "Volumetric Error Model of Large CNC Machine Tool and Verification Based on Particle Swarm Optimization." Key Engineering Materials 579-580 (September 2013): 76–79. http://dx.doi.org/10.4028/www.scientific.net/kem.579-580.76.

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Volumetric error has large effect on machine tool accuracy; improving CNC machine tool accuracy through error compensation has received significant attention recently. This paper intends to represent volumetric error measurement based on laser tracker. The volumetric error is modeled by homogenous transformation matrix with each coordinate corresponding to each motion axis. Based on parts of spatial points volumetric error, the geometric errors which affect volumetric positioning error are verified through particle swarm optimization with the L2 parameters as the target function. The chebyshev orthogonal polynomials are applied to approximate geometric errors.
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Holub, Michal, Robert Jankovych, Jan Vetiska, Jan Sramek, Petr Blecha, Jan Smolik, and Petr Heinrich. "Experimental Study of the Volumetric Error Effect on the Resulting Working Accuracy—Roundness." Applied Sciences 10, no. 18 (September 8, 2020): 6233. http://dx.doi.org/10.3390/app10186233.

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Currently, various types of software compensations are applied to machine tools. Their aim is to increase the working accuracy of the tools. The improvement in working accuracy is then further assessed according to the increase in the dimensional and shape accuracy or the surface quality of the workpiece. This publication describes the effects of the volumetric accuracy of a machine tool on the working accuracy of a workpiece, where total roundness (RONt) is evaluated in multiple cuts. In the experiment, two test workpieces are manufactured on a three-axis milling machining centre. The first is made using a standard machine setup while the second with activated volumetric compensation. The LaserTRACER self-tracking laser interferometer is used to compensate for volumetric accuracy. In the second part, verification measurements are performed with a Ballbar, where roundness error is evaluated according to ISO 230-4. Then two test workpieces are machined, and, in the last part, measurement is performed on Talyrond 595S roundness measuring equipment. Finally, the results are analysed and the dependence between the volumetric accuracy, the circularity error of the machine and the working accuracy of the CNC machine tool is established, represented by the RONt of the workpiece. This paper presents new and unpublished relations between the volumetric accuracy of the machine tool and the RONt of the workpiece.
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Wang, K., X. Sheng, and R. Kang. "Volumetric Error Modelling, Measurement, and Compensation for an Integrated Measurement-Processing Machine Tool." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 224, no. 11 (April 27, 2010): 2477–86. http://dx.doi.org/10.1243/09544062jmes2200.

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The volumetric error of a measurement-processing integrated machine tool was studied by using a complicated surface workpiece grinding machine as a special example. The model of volumetric error was established by using homogeneous transformation matrices, and the effect of volumetric error on coordinate transformation between the measurement and the processing work station was analysed. Various error components of the machine tool were measured with a laser interferometer and an electronic level, and the volumetric error was compensated by external software. With a ball bar system and grinding experiments, the volumetric position accuracy was tested after compensation. The experiment results illustrated that both the volumetric position accuracy and machining precision were improved dramatically after compensation.
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Chromy, Adam. "Application of High-Resolution 3D Scanning in Medical Volumetry." International Journal of Electronics and Telecommunications 62, no. 1 (March 1, 2016): 23–31. http://dx.doi.org/10.1515/eletel-2016-0003.

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Abstract This paper deals with application of 3D scanning technology in medicine. Important properties of 3D scanners are discussed with emphasize on medical applications. Construction of medical 3D scanner according to these specifications is described and practical application of its use in medical volumetry is presented. Besides volumetry, such 3D scanner is usable for many other purposes, like monitoring of recovery process, ergonomic splint manufacturing or inflammation detection. 3D scanning introduces novel volumetric method, which is compared with standard methods. The new method is more accurate compared to present ones. Principles of this method are discussed in paper and its accuracy is evaluated and experimentally verified.
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Yoon, Jung Soo, Hwang Jung Kim, Jin Yun Kim, and Sun Gyoo Park. "Accuracy and Continuity of Infusion Devices with Volumetric Analyzer." Korean Journal of Anesthesiology 28, no. 5 (1995): 611. http://dx.doi.org/10.4097/kjae.1995.28.5.611.

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Dissertations / Theses on the topic "Volumetric accuracy"

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Kaňa, Roman. "Pracovní přesnost obráběcího stroje MCV 754." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-231952.

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Bc. Roman Kaňa Working accuracy machine MCV 754 Main aim of this diploma thesis is to find out the influence of volumetric compensations to working accuracy. This thesis consists of detail description of measuring with the aid of Ballbar and Laser Tracer, error compensation of the machine and also designing, machining and measuring of the control work-piece. According to results there is also evaluation of volumetric compensation benefits leading to increasing the working accuracy of measured machine.
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Marek, Tomáš. "Predikování vybraných vlastností rotačních kinematických dvojic obráběcích strojů." Doctoral thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-408064.

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The dissertation thesis is used as a methodology for prediction of selected parameters of rotational kinematic pairs of machine tools. The motivation for its writing has been continually increasing requirements for parameters (performance, accuracy, static and dynamic stiffness) of machine tools. The methodology takes into account the availability of suitable measuring devices and description of the design of rotary kinematic pairs. It will be useable for predicting the behavior of rotational kinematic pairs, even at the design stage by applying results to the machine design. The work is processed so that first is used a system approach to suggest methodology for prediction of the behavior of rotary kinematic pair in CNC machine tools, planning measurement strategy and verifying the results, including applications for specific kinematic chain of the selected machine. Based on this system approach and the resulting methodology, the measurement of the rotary kinematic pair was performed. The results of the system approach and measurement are generalized in the form of recommendations for designers of machining centers, allowing to increase the accuracy of the rotational kinematic pair.
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Máčala, Daniel. "Volumetrická přesnost obráběcích strojů." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-402567.

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The diploma thesis deals with the influence of the volumetric accuracy of the machine tool on the size of the assessed work space. The impact assessment was carried out on the basis of tests of a three-axis vertical CNC machining center. The thesis is divided into two parts, theoretical and practical. The theoretical part is focused on geometric / volumetric accuracy of machine tools, measuring technique for measuring geometric errors and Design of Experiment. In the practical part, there is an analysis of the Design of Experiment according to Shainin, description of the work with the measuring instruments and the measurement of the geometric / volumetric accuracy of the machine including statistical evaluation. The output of the thesis is the description of the influence of volumetric deviation on the size of the measured work space by means of statistical methods.
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Vala, Michal. "Testování technologie on-the-fly přístrojem LaserTRACER." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-319262.

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This diploma thesis describes realization and testing on-the-fly measurement using tracking interferometer. This measurement enables to achieve higher amount of measured points and decrease time of machine tool calibration. Calibration and verification values of machine parameters, as well as time of measurement and other details of this method are compared with results of conventional method called trigger. To evaluate the quality of volumetric compensation created from calibration values, we use verification measurement of circular interpolation.
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Andrýsek, Jakub. "Nasazení pokročilých kompenzací na stroji MCV 754 QUICK." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-319258.

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This work is focused on the software compensation of the geometric and volumetric errors. In the thesis there are descripted the measuring instruments suitable for measuring geometric and volumetric errors of the machine tool. In addition, there are described control systems and selected software compensations currently used in the machine tools. In the experimental part of the thesis there is briefly described the machining machine where the experiment was performed. Detailed procedures for using the used measuring instruments are also described. The aim of this thesis is to determine the influence of the size of the compensated volume on the geometric and volumetric precision of the machine tool.
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Hirashima, Hideaki. "Establishment of machine and patient-specific quality assurance methods for advanced volumetric modulated arc therapy." Kyoto University, 2019. http://hdl.handle.net/2433/242352.

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Satherley, Thomas William Scott. "The impact of plan complexity on the accuracy of VMAT for the treatment of head and neck cancer." Thesis, University of Canterbury. Physics, 2015. http://hdl.handle.net/10092/10584.

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Purpose: At the Wellington Blood and Cancer Centre (WBCC), Volumetric Modulated Arc Therapy (VMAT) is used to treat a variety of head and neck (H&N) cancers. Presently, the complexity of plans is limited to ensure the accuracy of patient treatment within the range of the departmental experience. The complexity limitation is applied through use of a monitor unit (MU) constraint during plan optimisation. Plans of higher complexity can be obtained by loosening the MU constraint, and setting more stringent optimisation objectives on organs at risk (OAR) and target volumes (PTV). This could potentially yield higher quality treatment plans but may also degrade the accuracy of the TPS calculation or the plan delivery at the treatment machine. The aim of this study is to investigate the level of plan complexity that results in accurate treatment plan calculation and delivery, and quantify the corresponding gain in plan quality. Methods: Five previously treated H&N patients were selected for the study. Each patient’s clinical plan was used as the lowest complexity level and labelled C1. Subsequently, an approximate pareto-optimal plan (C3) was created that focused equally on sparing spinal cord, brain stem and parotid gland while maintaining, or improving on, the previously obtained target coverage. Next, a C2 plan was created such that the plan quality was in between C1 and C3. Plan quality of each complexity level was assessed in terms of OAR sparing and PTV coverage. The average leaf pair opening (LPO), critical leaf pair opening (%LPO<1cm) and mean leaf travel were used as plan complexity metrics. The calculation and delivery accuracy of each complexity level using Varian TrueBeam LINAC/Eclipse TPS was verified using time resolved point dose measurements (TRPD), EBT film measurements (Ashland Inc.) and ArcCheck measurements (Sun Nuclear Corp.). A comprehensive uncertainty analysis was carried out including a quantification of the measurement and delivery reproducibility. Results: Increasing plan complexity from C1 to C3 reduced the Spinal Cord D1cc, Brain Stem D1 and Parotid Gland Dmean up to 14.7 Gy, 7.1 Gy and 7.8 Gy, respectively. In addition, C3 plans improved the target coverage compared to C1 plans, with the PTV66 and PTV54 D98 increasing up to 1.0 Gy and 0.6 Gy, respectively. The verification measurements showed that the plan calculation and delivery for all complexity levels was well within clinical acceptance levels (Table 1). TRPD showed that VMAT dose delivery itself was repeatable within 0.1% (1 S.D.) over 10 consecutive deliveries for both C1 and C3 complexity levels. Discussion & Conclusions: This study has shown that increasing the plan complexity can provide significant dosimetric advantages for the treatment of H&N cancer. Verification measurement results indicated that this did not noticeably degrade the calculation and delivery accuracy of VMAT using a Varian TrueBeam LINAC and our Eclipse TPS beam model. H&N VMAT at the WBCC can now be developed further with greater confidence in the dosimetric accuracy of higher complexity plans.
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Velič, Samuel. "Měření obrobků na obráběcích strojích pomocí obrobkové sondy." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-417728.

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This diploma thesis deals with the influence of electronic compensation on accuracy of the measurement using the touch probe. The theoretical part concerns touch probes, specifically their classification, principles of working and applications. This part also includes devices used later in the experiment, particularly double ballbar, laser interferometer and LaserTRACER. The Practical part describes an experiment, demonstrating the correlation between the accuracy improvement of the touch probe and the electronic compensation’s level. All measurements were executed in accordance with the norm VDA 5 and were evaluated by the Matlab software. The graphs of reliance tolerance of capability of measurement on the length of the benchmark. At the end of this diploma thesis there are partial conclusions deduced. The deduction is based on generated graphs. The partial conclusions synoptically compare the influence of individual machine´s configurations on the accuracy of the touch probe.
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Bowyer, Matouš. "Multiparametrická diagnostika vysokootáčkového stroje." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-402507.

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The goal of the thesis was applying multiparametric diagnostics to determine the state and wear of a high-speed milling machine. In the theoretical section, selected areas of multiparametric diagnostics have been described as well as a significant focus on vibrodiagnostics. The chosen methods for the practical section were incorporated into the group “metrological diagnostics”. Several different types of measurements have been performed on the designed test piece. The measurements were analyzed and lead to these specific results: a drawing of the test piece, a structured methodology for evaluating the test piece, recommendations for diagnostics of the specific machine, and proposals for the future development of the field of metrological diagnostics.
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Mišún, Filip. "Návrh automatického cyklu pro posuzování způsobilosti měření obrobkovou sondou na obráběcím centru." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-443252.

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This diploma thesis describes the procedures of individual electronic compensations for CNC machines used to increase the accuracy of machines. This part is followed by the determining tolerance of the measuring and the influence of individual electronic compensations based on measured data using touch probe and calibrated standards according to VDA 5 norm.
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Books on the topic "Volumetric accuracy"

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Olvera-Silva, O. Volumetric accuracy analysis of coordinate measuring machines using parametric data. Manchester: UMIST, 1993.

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Arulkumaran, Nishkantha, and Maurizio Cecconi. Cardiac output assessment in the ICU. Oxford University Press, 2016. http://dx.doi.org/10.1093/med/9780199600830.003.0136.

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Haemodynamic monitoring facilitates effective resuscitation and the rapid assessment of the response to time-dependent vasoactive and fluid therapyin different shock states. Since the introduction of the pulmonary artery catheter, several minimally and non-invasive CO monitoring devices have been introduced to provide continuous monitoring and a dynamic profile of fluid responsiveness. Several of these monitors provide additional haemodynamic parameters including dynamic indices of preload and volumetric indices. Patient outcome is dependent accurate acquisition and interpretation of data and subsequent management. Whilst data from CO monitors offer valuable information on global hamodynamics, they do not preclude tissue hypoperfusion. Furthermore, there is no ‘ideal’ CO value for an individual patient, and the trend in haemodynamic parameters in response to therapy may be more informative than the absolute values. CO monitoring should be based upon the patient’s needs, the clinical scenario, and the experience of the treating physician.
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Book chapters on the topic "Volumetric accuracy"

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Smit-Ockeloen, Iris, Daniel Ruijters, Marcel Breeuwer, Drazenko Babic, Olivier Brina, and Vitor Mendes Pereira. "Accuracy Assessment of CBCT-Based Volumetric Brain Shift Field." In Clinical Image-Based Procedures. Translational Research in Medical Imaging, 1–9. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-31808-0_1.

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Thiem, X., B. Kauschinger, J. Müller, and S. Ihlenfeldt. "Estimation of the Influence of Volumetric Correction Approaches on the Thermo-Elastic Correction Accuracy." In Lecture Notes in Production Engineering, 324–33. Berlin, Heidelberg: Springer Berlin Heidelberg, 2020. http://dx.doi.org/10.1007/978-3-662-62138-7_33.

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Zhou, R., B. Kauschinger, C. Friedrich, and S. Ihlenfeldt. "Fast Evaluation of Volumetric Motion Accuracy of Multi-axis Kinematics Using a Double Ballbar." In Lecture Notes in Production Engineering, 345–53. Berlin, Heidelberg: Springer Berlin Heidelberg, 2020. http://dx.doi.org/10.1007/978-3-662-62138-7_35.

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Cañavate, F. J. F., F. Cavas, J. S. Velázquez, J. M. Bolarín, and J. L. Alió. "Analysis of the Accuracy of Reconstruction of a Human Cornea by Two Geometric Modelling Techniques: A Comparative Study." In Lecture Notes in Mechanical Engineering, 255–60. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-70566-4_41.

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AbstractThis study compares two techniques of reconstruction and representation of the anterior and posterior surfaces of the human cornea, both for healthy and for keratoconus eyes, in a CAD software environment using raw tomographic data, by two different methods: a mesh model (obtained from a grid of points) and a NURBS surface model. After reconstruction, a morpho-geometric analysis was made, and several parameters were defined and measured in a set of 100 healthy eyes and 61 keratoconus eyes, detecting the statistical analysis significant differences between methods for both groups. Mesh method proved to be more accurate, but less eyes could be modelled. Volumetric and surface measurement values showed a total equivalence between both methods, so these would be the ones to use when modelling eyes for keratoconus detection and characterization purposes.
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Svoboda, Ondrej. "Comparative Study of the Volumetric Positioning Accuracy of CNC Machining Centres Using the Latest Laser Measurement Technology." In Proceedings of the 34th International MATADOR Conference, 321–26. London: Springer London, 2004. http://dx.doi.org/10.1007/978-1-4471-0647-0_48.

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Yao, Wei, and Jianwei Wu. "Airborne LiDAR for Detection and Characterization of Urban Objects and Traffic Dynamics." In Urban Informatics, 367–400. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-15-8983-6_22.

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AbstractIn this chapter, we present an advanced machine learning strategy to detect objects and characterize traffic dynamics in complex urban areas by airborne LiDAR. Both static and dynamical properties of large-scale urban areas can be characterized in a highly automatic way. First, LiDAR point clouds are colorized by co-registration with images if available. After that, all data points are grid-fitted into the raster format in order to facilitate acquiring spatial context information per-pixel or per-point. Then, various spatial-statistical and spectral features can be extracted using a cuboid volumetric neighborhood. The most important features highlighted by the feature-relevance assessment, such as LiDAR intensity, NDVI, and planarity or covariance-based features, are selected to span the feature space for the AdaBoost classifier. Classification results as labeled points or pixels are acquired based on pre-selected training data for the objects of building, tree, vehicle, and natural ground. Based on the urban classification results, traffic-related vehicle motion can further be indicated and determined by analyzing and inverting the motion artifact model pertinent to airborne LiDAR. The performance of the developed strategy towards detecting various urban objects is extensively evaluated using both public ISPRS benchmarks and peculiar experimental datasets, which were acquired across European and Canadian downtown areas. Both semantic and geometric criteria are used to assess the experimental results at both per-pixel and per-object levels. In the datasets of typical city areas requiring co-registration of imagery and LiDAR point clouds a priori, the AdaBoost classifier achieves a detection accuracy of up to 90% for buildings, up to 72% for trees, and up to 80% for natural ground, while a low and robust false-positive rate is observed for all the test sites regardless of object class to be evaluated. Both theoretical and simulated studies for performance analysis show that the velocity estimation of fast-moving vehicles is promising and accurate, whereas slow-moving ones are hard to distinguish and yet estimated with acceptable velocity accuracy. Moreover, the point density of ALS data tends to be related to system performance. The velocity can be estimated with high accuracy for nearly all possible observation geometries except for those vehicles moving in or (quasi-)along the track. By comparative performance analysis of the test sites, the performance and consistent reliability of the developed strategy for the detection and characterization of urban objects and traffic dynamics from airborne LiDAR data based on selected features was validated and achieved.
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Hahn, Horst K., Benoît Jolly, Miriam Lee, Daniel Krastel, Jan Rexilius, Johann Drexl, Mathias Schlüter, Burckhard Terwey, and Heinz-Otto Peitgen. "How Accurate Is Brain Volumetry?" In Medical Image Computing and Computer-Assisted Intervention – MICCAI 2004, 335–42. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-540-30135-6_41.

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Mai, Dominic, Jasmin Dürr, Klaus Palme, and Olaf Ronneberger. "Accurate Detection in Volumetric Images Using Elastic Registration Based Validation." In Lecture Notes in Computer Science, 453–63. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-11752-2_37.

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Santarelli, Chiara, Francesca Uccheddu, Fabrizio Argenti, Luciano Alparone, Monica Carfagni, and Lapo Governi. "Shift-Compensated Volumetric Interpolation of Tomographic Sequences for Accurate 3D Reconstruction." In IFMBE Proceedings, 312–21. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-31635-8_38.

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Santarelli, Chiara, Francesca Uccheddu, and Elisa Mussi. "Accurate Liver 3D Reconstruction from MRE Images Using Shift-Compensated Volumetric Interpolation." In Lecture Notes in Mechanical Engineering, 731–40. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-31154-4_62.

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Conference papers on the topic "Volumetric accuracy"

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Anderson, Andrew E., Benjamin J. Ellis, Christopher L. Peters, and Jeffrey A. Weiss. "Accuracy of Cartilage Geometry Reconstruction From Volumetric CT Data: A Phantom Study." In ASME 2007 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2007. http://dx.doi.org/10.1115/sbc2007-174936.

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Segmentation of medical image data is often used for the construction of computational models to study the mechanics of diarthrodial joints such as the hip and knee. The analyst must demonstrate that the reconstructed geometry is an accurate representation of the true continuum to ensure model validity. This becomes especially important for computational modeling of joint contact, which requires accurate reconstruction of articular cartilage. Although volumetric computed tomography (CT) is often used to image diarthrodial joints, the lower bounds for detecting articular cartilage thickness and the influence of imaging parameters on the ability to image cartilage have not been reported. The use of contrast agent (CT arthrography) is necessary to visualize the surface of articular cartilage in live patients. Thus, it is of primary interest to quantify the accuracy of CT arthrography to demonstrate the feasibility of patient-specific modeling. The objectives of this study were to assess the accuracy and detection limits of CT for measuring simulated cartilage thickness using a phantom and to quantify changes in accuracy due to alterations in contrast agent concentration, imaging plane direction, spatial resolution and joint spacing.
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Vicentini, Federico, Paolo Magnoni, Matteo Giussani, and Lorenzo Molinari Tosatti. "Volumetric compensation of accuracy errors in a multi-robot surgical platform." In 2015 37th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC). IEEE, 2015. http://dx.doi.org/10.1109/embc.2015.7319494.

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Wang, C. "Current issues on 3D volumetric positioning accuracy: measurement, compensation, and definition." In Seventh International Symposium on Instrumentation and Control Technology, edited by Jiancheng Fang and Zhongyu Wang. SPIE, 2008. http://dx.doi.org/10.1117/12.806755.

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Chen, Xuying, Chengwei Liu, Jinghui Xu, Hong Chen, Yong Wang, Liang Hu, and Jin Xie. "A High Accuracy Transit-Time Airflow Volumetric Flowmeter Based on pMUTs Arrays." In 2019 IEEE 32nd International Conference on Micro Electro Mechanical Systems (MEMS). IEEE, 2019. http://dx.doi.org/10.1109/memsys.2019.8870675.

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Van Damme, Sam, Maria Torres Vega, and Filip De Turck. "A Full- and No-Reference Metrics Accuracy Analysis for Volumetric Media Streaming." In 2021 13th International Conference on Quality of Multimedia Experience (QoMEX). IEEE, 2021. http://dx.doi.org/10.1109/qomex51781.2021.9465420.

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Weng, Lingtao, Weiguo Gao, Dawei Zhang, Guangming Sun, Wenjie Tian, and Teng Liu. "Influences of linear and angular compensation on volumetric accuracy of precision machine tools." In 2018 IEEE International Conference on Advanced Manufacturing (ICAM). IEEE, 2018. http://dx.doi.org/10.1109/amcon.2018.8615030.

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Piedra, Edgar A. Rios, Ricky K. Taira, Suzie El-Saden, Benjamin M. Ellingson, Alex A. T. Bui, and William Hsu. "Assessing variability in brain tumor segmentation to improve volumetric accuracy and characterization of change." In 2016 IEEE-EMBS International Conference on Biomedical and Health Informatics (BHI). IEEE, 2016. http://dx.doi.org/10.1109/bhi.2016.7455914.

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Fieselmann, Andreas, Daniel Förnvik, Hannie Förnvik, Kristina Lång, Hanna Sartor, Sophia Zackrisson, Ludwig Ritschl, and Thomas Mertelmeier. "Volumetric breast density measurement for personalized screening: accuracy, reproducibility, and agreement with visual assessment." In Fourteenth International Workshop on Breast Imaging, edited by Elizabeth A. Krupinski. SPIE, 2018. http://dx.doi.org/10.1117/12.2315069.

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Ak, Ali, Emin Zerman, Suiyi Ling, Patrick Le Callet, and Aljosa Smolic. "The Effect of Temporal Sub-sampling on the Accuracy of Volumetric Video Quality Assessment." In 2021 Picture Coding Symposium (PCS). IEEE, 2021. http://dx.doi.org/10.1109/pcs50896.2021.9477449.

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Wang, Shih-Ming, Han-Jen Yu, and Hung-Wei Liao. "An Efficient Volumetric-Error Measurement Method for Five-Axis Machine Tools." In ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-83000.

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Abstract:
Accurate measurement of volumetric errors plays an important role for error compensation for multi-axis machines. The error measurements for volumetric errors of five-axis machines are usually very complex and costly than that for three-axis machines. In this study, a direct and simple measurement method using telescoping ball-bar system for volumetric errors for different types of five-axis machines was developed. The method using two-step measurement methodology and incorporating with derived error models, can quickly determine the five degrees-of-freedom (DOF) volumetric errors of five-axis machine tools. Comparing to most of the current used measurement methods, the proposed method provides the advantages of low cost, high efficiency, easy setup, and high accuracy.
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Reports on the topic "Volumetric accuracy"

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

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Recent advances in visual sensing technology have gained much attention in the field of bridge inspection and management. Coupled with advanced robotic systems, state-of-the-art visual sensors can be used to obtain accurate documentation of bridges without the need for any special equipment or traffic closure. The captured visual sensor data can be post-processed to gather meaningful information for the bridge structures and hence to support bridge inspection and management. However, state-of-the-practice data postprocessing approaches require substantial manual operations, which can be time-consuming and expensive. The main objective of this study is to develop methods and algorithms to automate the post-processing of the visual sensor data towards the extraction of three main categories of information: 1) object information such as object identity, shapes, and spatial relationships - a novel heuristic-based method is proposed to automate the detection and recognition of main structural elements of steel girder bridges in both terrestrial and unmanned aerial vehicle (UAV)-based laser scanning data. Domain knowledge on the geometric and topological constraints of the structural elements is modeled and utilized as heuristics to guide the search as well as to reject erroneous detection results. 2) structural damage information, such as damage locations and quantities - to support the assessment of damage associated with small deformations, an advanced crack assessment method is proposed to enable automated detection and quantification of concrete cracks in critical structural elements based on UAV-based visual sensor data. In terms of damage associated with large deformations, based on the surface normal-based method proposed in Guldur et al. (2014), a new algorithm is developed to enhance the robustness of damage assessment for structural elements with curved surfaces. 3) three-dimensional volumetric models - the object information extracted from the laser scanning data is exploited to create a complete geometric representation for each structural element. In addition, mesh generation algorithms are developed to automatically convert the geometric representations into conformal all-hexahedron finite element meshes, which can be finally assembled to create a finite element model of the entire bridge. To validate the effectiveness of the developed methods and algorithms, several field data collections have been conducted to collect both the visual sensor data and the physical measurements from experimental specimens and in-service bridges. The data were collected using both terrestrial laser scanners combined with images, and laser scanners and cameras mounted to unmanned aerial vehicles.
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