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Journal articles on the topic 'Distortion curve'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

Liu, Yuqi, Yihang Ran, Yi Yang, Lin Chen, Tuling Xiong, and Hongchen Pan. "Analysis of impact of group delay on slope distortion of S-curve in delay locked loop." Journal of Navigation 74, no. 3 (2021): 698–712. http://dx.doi.org/10.1017/s0373463321000035.

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AbstractAs essential specifications of correlation domain for signal quality evaluation, distortions of the S-curve, including bias and slope distortions of the zero-crossing point, are usually selected as indicators of optimisation in the process of designing the channels of receivers or navigation satellites. Focusing on this issue, we present a detailed analysis of slope distortion in the presence of group delay and amplitude distortions. After validating the theoretical results, we present further discussions about the impacts of different group delay terms on slope distortions. The result

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Zhang, Bao Long, Shao Jing Zhang, Wei Qi Ding, and Hui Shuang Shi. "Fisheye Lens Distortion Calibration Based on the Lens Charactetic Curves." Applied Mechanics and Materials 519-520 (February 2014): 636–39. http://dx.doi.org/10.4028/www.scientific.net/amm.519-520.636.

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The fisheye lens is a kind of ultra wide angle lens, which can produce a big super-wide-angle lens distortion. In order to cover a large scope of light, barrel distortion is artificially added to the optical system. However, in some cases this distortion is not allowed, then it requires calibrations of those distortions. Most of the traditional distortion calibration method uses target plane calibration to do it. This paper discusses the way of design fisheye lens, through which we can know the forming process of distortion clearly. Based on this paper, a simple and effective calibration metho

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Denne, Elizabeth, and John M. Sullivan. "The distortion of a knotted curve." Proceedings of the American Mathematical Society 137, no. 03 (2008): 1139–48. http://dx.doi.org/10.1090/s0002-9939-08-09705-0.

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Ikokou, G. B., and J. Smit. "HYPERBOLIC DISTORTION MODEL FOR RADIAL DISTORTION CORRECTION." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-2/W13 (June 5, 2019): 1667–71. http://dx.doi.org/10.5194/isprs-archives-xlii-2-w13-1667-2019.

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<p><strong>Abstract.</strong> When information derived from the imagery is used for metric purposes and not as communication tools the impact of small imaging errors can be significant on the accuracy of derived information. As the number of photogrammetry applications grows and the technology advances, camera calibration becomes more complex. In fact, most lenses suffer from at least one kind of distortion profile such as barrel, pincushion or ‘moustache’ profiles. Commonly observed on wide angle lenses, barrel distortions curve straight lines inwards to give the image shape

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Parmar, Anisha, Niraj Kinariwala, Nirav Parekh, Vishwesh Joshi, Riya Modi, and Urooj Desai. "Evaluation of surface topography of two different heat treated NiTi file systems used with sodium hypochlorite: A stereomicroscope and SEM study." Bioinformation 21, no. 05 (2025): 1257–65. https://doi.org/10.6026/973206300211257.

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The surface grooves on endodontic files act as stress concentration and it lowers their susceptibility to fatigue fracture. Hence, 80 first mandibular molars were prepared with 40 rotary instruments, 20 One Curve (OC; Micro-Mega) and 20 TruNatomy (TN; Dentsply Sirona,) rotary files. The files were rotated in mesial curved canals with irrigation with 5.25% sodium hypochlorite (Normal temperature and preheated) and inspected under SEM for surface roughness. Stereomicroscope analysis was done for Unwinding and Distortion. One Curve files showed signs of deformation and distortion earlier as compa

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Kolesnikov, Alexander, and Tuomo Kauranne. "Unsupervised segmentation and approximation of digital curves with rate-distortion curve modeling." Pattern Recognition 47, no. 2 (2014): 623–33. http://dx.doi.org/10.1016/j.patcog.2013.09.002.

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Hahn, Michael, and Richard Futrell. "Estimating Predictive Rate–Distortion Curves via Neural Variational Inference." Entropy 21, no. 7 (2019): 640. http://dx.doi.org/10.3390/e21070640.

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The Predictive Rate–Distortion curve quantifies the trade-off between compressing information about the past of a stochastic process and predicting its future accurately. Existing estimation methods for this curve work by clustering finite sequences of observations or by utilizing analytically known causal states. Neither type of approach scales to processes such as natural languages, which have large alphabets and long dependencies, and where the causal states are not known analytically. We describe Neural Predictive Rate–Distortion (NPRD), an estimation method that scales to such processes,

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Chen, Tianfei, Lijun Sun, Qiuwen Zhang, Xiang Wu, and Defeng Wu. "Nonmetric Correction of Lens Distortion Based on Entropy Measure." Scientific Programming 2018 (2018): 1–9. http://dx.doi.org/10.1155/2018/4230185.

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In the real vision system, lens always inevitably contains nonlinear distortion, which leads to geometric distortion of digital image, so it must be corrected. In this paper, a nonmetric correction algorithm for lens distortion based on entropy measure is proposed. The algorithm uses the imaging characteristics of the space line in the ideal perspective model, and the distortion entropy is defined to measure the degree of lens distortion. For distortion curves with different distribution, the calculation dimension of distortion entropy measure is uniform, which can reduce the influence of curv

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Sun, Yufen, and Gang Liu. "Rolling shutter distortion removal based on curve interpolation." IEEE Transactions on Consumer Electronics 58, no. 3 (2012): 1045–50. http://dx.doi.org/10.1109/tce.2012.6311354.

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Mejía, Yobani, and Rufino Díaz-Uribe. "Third order distortion analysis from an envelope curve." Optics Communications 454 (January 2020): 124492. http://dx.doi.org/10.1016/j.optcom.2019.124492.

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McFadgen, B. G., F. B. Knox, and T. R. L. Cole. "Radiocarbon Calibration Curve Variations and Their Implications for the Interpretation of New Zealand Prehistory." Radiocarbon 36, no. 2 (1994): 221–36. http://dx.doi.org/10.1017/s0033822200040510.

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The shape of a distribution of calibrated 14C dates displays spurious peaks and troughs, brought about by changes in the slope of the calibration curve interacting with the spreading effect of the stochastic distribution of counting errors. The distortion results in a positive correlation between the numbers of dates per calendar year and the slopes of the calibration curves, for assemblages of archaeological dates from such widely separated areas as British Columbia, South Australia and New Zealand. The distortion also increases the possibility of date reversals, and increases the overall spr

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Zhang, Lei, Weidong Zhu, Aimin Ji, and Liping Peng. "A new approach to the identification of distortion modes of thin-walled structures based on plate/shell theory." MATEC Web of Conferences 278 (2019): 03005. http://dx.doi.org/10.1051/matecconf/201927803005.

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In this paper, a new approach to identify cross-section deformation modes is presented and utilized in the establishment of a high-order beam model for dynamic analyses of thin-walled structures. Towards this end, a systematic procedure to extract cross-section in-plane vibration shapes for a thin-walled cross-section is developed based on elastic plate/shell theory. Then the distortion shapes are separated from vibration shapes by removing the components of classic modes involved with the minimum value problem of 2-norm. Sequentially, curve fitting method is utilized to approximate the distor

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Shchurov, Nickolay I., Sergey V. Myatezh, Boris V. Malozyomov, et al. "Determination of Inactive Powers in a Single-Phase AC Network." Energies 14, no. 16 (2021): 4814. http://dx.doi.org/10.3390/en14164814.

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Based on the development of the theory of reactive power and distortion power, starting with the works of Fryze and Budeanu, it has been found that the contradictions in the definition of the components of inactive powers are caused by errors in the introduced intermediate concepts and corresponding calculations when switching to nonlinear and non-sinusoidal AC circuits. The materials of the works of modern researchers and the numerical calculations carried out made it possible to trace the differences between reactive power and distortion power, to confirm the orthogonality properties of the

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Liang, Jicai, Yanfei Liao, Yi Li, and Ce Liang. "Study on the Influence of Bending Angle of Multipoint Stretch-Bending of Profiles on Section Distortion of Parts." Mathematical Problems in Engineering 2020 (February 19, 2020): 1–11. http://dx.doi.org/10.1155/2020/1975805.

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The ABAQUS finite element simulation software was used to simulate the flexible 3D multipoint stretch-bending (MPSB) forming process of aluminum profiles. The influence of bending angle on the section distortion was investigated. The results show that the type of rectangular section distortion during horizontal bending and vertical bending is different. The bulging rate and the depression rate increase with the increase in horizontal bending angles; when the vertical bending angle is less than 15°, the depression rate of the horizontally curved section is effectively reduced. When α is equal t

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Feng, Zhenghui, Yujie Gai, and Jun Zhang. "Correlation curve estimation for multiplicative distortion measurement errors data." Journal of Nonparametric Statistics 31, no. 2 (2019): 435–50. http://dx.doi.org/10.1080/10485252.2019.1580708.

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Udawatta, Methma, Francesca Fortenbaugh, and Karen Schloss. "Slant-induced shape distortion in the Distorted Curve Illusion." Journal of Vision 16, no. 12 (2016): 788. http://dx.doi.org/10.1167/16.12.788.

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Caliste, Thu Nhi Tran, Alexis Drouin, Damien Caliste, Carsten Detlefs, and José Baruchel. "Rocking Curve Imaging Investigation of the Long-Range Distortion Field between Parallel Dislocations with Opposite Burgers Vectors." Applied Sciences 11, no. 19 (2021): 9054. http://dx.doi.org/10.3390/app11199054.

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We observe a long-range distortion field between parallel dislocations with opposite Burgers vectors in a platelet-shaped single crystal of 4H-SiC with a low dislocation density (~103 cm/cm3). This distortion field is in the µradian range when the distance D between dislocations is in the ~50–250 µm range. We were able to characterise this weak distortion field through Rocking Curve Imaging (RCI), a highly sensitive Bragg diffraction imaging technique using monochromatic synchrotron radiation. From the experimental images, we generate maps of the angle of maximum reflectance (“peak position”)

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Seong, Woo-Jae. "Prediction and Characteristics of Angular Distortion in Multi-Layer Butt Welding." Materials 12, no. 9 (2019): 1435. http://dx.doi.org/10.3390/ma12091435.

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Multi-layer welding involves the process of stacking many beads, so it requires much time and effort to predict the deformation through experimentation or numerical analysis. In this study, a systematic method for predicting transverse angular distortion in multi-layer butt welding has been proposed. First, the database was established through bead-on-plate welding experiments, which consisted of the relationship between welding conditions, the bead geometry, the material thickness, and the angular distortion. Then, when the arbitrary welding conditions and the shape of the butt joint were inp

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Ichikawa, Yuma, and Koji Hukushima. "High-dimensional asymptotics of VAEs: threshold of posterior collapse and dataset-size dependence of rate-distortion curve." Journal of Statistical Mechanics: Theory and Experiment 2025, no. 7 (2025): 073402. https://doi.org/10.1088/1742-5468/adde3e.

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Abstract In variational autoencoders (VAEs), the variational posterior often collapses to the prior, known as posterior collapse, which leads to poor representation learning quality. An adjustable hyperparameter beta has been introduced in VAEs to address this issue. This study sharply evaluates the conditions under which the posterior collapse occurs with respect to beta and dataset size by analyzing a minimal VAE in a high-dimensional limit. Additionally, this setting enables the evaluation of the rate-distortion curve of the VAE. Our results show that, unlike typical regularization paramete

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Olson, L. E., T. A. Wilson, and J. R. Rodarte. "Distortion of submerged dog lung lobes." Journal of Applied Physiology 59, no. 2 (1985): 521–27. http://dx.doi.org/10.1152/jappl.1985.59.2.521.

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The conically shaped caudal lobes of dog lungs were submerged, tip downward in saline, and the lateral surfaces of the lobes were thereby exposed to a hydrostatic gradient in transpulmonary pressure. The force that was required to balance the buoyancy was applied through a clip attached to the tip of the lobe. The locations of metal markers implanted in the parenchyma and attached to the surface were tracked, and regional volume and the horizontal and vertical components of strain were obtained as functions of vertical position. An engineering analysis of the deformation is qualitatively consi

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Babacan, Hakkı Halil, Ramazan Oğuz, and Yahya Kemal Beyitoğlu. "Creating a Clinical Psychology Dataset with Synthetic Data: Automatic Detection of Cognitive Distortions Classified with NLP." Fırat Üniversitesi Mühendislik Bilimleri Dergisi 37, no. 1 (2024): 83–92. https://doi.org/10.35234/fumbd.1469178.

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Cognitive distortions are thought errors that lead individuals to perceive reality in a misleading way and are strongly associated with psychopathologies. Therefore, accurately identifying and classifying distortions can enhance the effectiveness of cognitive-behavioral therapy (CBT). This study investigates the effectiveness of deep learning and NLP techniques for the automatic detection of cognitive distortions. The RoBERTa model was trained using English synthetic data generated by GPT-4 (2000 examples) and the dataset from Shreevastava and Foltz (1590 cognitive distortion examples, 933 non

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Li, Xusheng, Dongying Ju, Jianting Cao, and Kousuke Ishikawa. "Analysis of the Distortion of the Bearing Rings after Quenching." Coatings 13, no. 7 (2023): 1190. http://dx.doi.org/10.3390/coatings13071190.

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Bearings are usually used at high-speed and high-load conditions, so the bearing sleeve must be able to withstand large contact stress, which requires heat treatment. However, during the quenching process of the bearing sleeve, a vapor film is formed on the surface. Since the vapor film is not uniform along the axial direction during the process of boiling and breaking, it will cause uneven distortion of the bearing sleeve. This uneven distortion will cause the outer ring of the bearing to have elliptical distortion after heat treatment. However, the mechanism of this problem and how to reduce

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Kachan, Yurii, Alexander Shram, and Artem Sverhun. "Possibilities to reduce the impact of vfd on the quality of electric power in the networks of enterprises and the cost of its use." Electrical Engineering and Power Engineering, no. 3 (October 30, 2022): 32–38. http://dx.doi.org/10.15588/1607-6761-2022-3-3.

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Purpose. Simulation modeling of internal power supply systems and comparative assessment on its basis of the total distortion coefficients of the sinusoidal voltage curve. Methodology. Methods of simulating modeling of internal power supply systems. Numerous methods for processing the obtained results. Methods for calculating the discrete Fourier transform. Findings. To increase the level of automation of technological processes in industrial electrical installations, frequency converters are widely used. Together with all the advantages of using a variable frequency drive, it leads to a disto

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Alijani, Hossein, Arzu Özbey, Mehrdad Karimzadehkhouei, and Ali Koşar. "Inertial Micromixing in Curved Serpentine Micromixers with Different Curve Angles." Fluids 4, no. 4 (2019): 204. http://dx.doi.org/10.3390/fluids4040204.

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Micromixers are of considerable significance in many microfluidics system applications, from chemical reactions to biological analysis processes. Passive micromixers, which rely solely on their geometry, have the advantages of low cost and a less-complex fabrication process. Dean vortices seen in curved microchannels are one of the useful tools to enhance micromixing. In this study, the effects of curve angle on micromixing were experimentally investigated in three curved serpentine micromixers consisting of ten segments with curve angles of 180 ° , 230 ° and 280 ° , at Dean numbers between 12

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Alekseeva, E. I., and V. A. Nikolaenko. "CT-Filters and Radiation Therapy Planning Accuracy: Curve CT-to-ED Recalibration Necessary?" Meditsinskaya Fizika, no. 1 (April 25, 2024): 93–95. http://dx.doi.org/10.52775/1810-200x-2024-101-1-93-95.

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Relevance: This article examines the effect of the presence or absence of an ImAR filter on the calibration curve for converting X-ray tomography (CT) data to relative electron density (CT-to-ED) values for the abdominal region and head. On CT images this results in distortion of Hounsfield Units (HU) values. The latter, in turn, can lead to inaccuracies in the CT-to-ED calibration curve. Conclusions: If the filters are set up correctly and applied according to the planning system manufacturer's recommendations, changes in the CT-to-Ed curve should be negligible. CT-to-ED curves are an importa

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Alekseeva, E. I., and V. A. Nikolaenko. "Implication of Filters on the Accuracy of Radiotherapy Planning and the Need for Recalibration of the CT-to-ED Curve." Meditsinskaya Fizika, no. 4 (December 29, 2023): 17–20. http://dx.doi.org/10.52775/1810-200x-2023-100-4-17-20.

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This article examines the effect of the presence or absence of an ImAR filter on the calibration curve for converting X-ray tomography (CT) data to relative electron density (CT-to-ED) values for the abdominal region and head. On CT images this results in distortion of Hounsfield Units (HU) values. The latter, in turn, can lead to inaccuracies in the CT-to-ED calibration curve. Conclusions: If the filters are set up correctly and applied according to the planning system manufacturer's recommendations, changes in the CT-to-Ed curve should be negligible. CT-to-ED curves are an important to

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Mohialdeen, Hasan Khiraldeen, Mohammed A. Abdulla, Ammar Kh Al-Noori, and Ashraf Measar Mohamad. "Accuracy of intraoral scanners based on jaw curve and inter-implant distance." Dental Journal 57, no. 4 (2024): 241–47. http://dx.doi.org/10.20473/j.djmkg.v57.i4.p241-247.

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Background: In digital dentistry, the intraoral scanner (IOS) is the primary data-collecting device. The data must be accurate to prevent undesirable stresses and technological difficulties resulting from prosthetic misfits. The span length of restorations influences the accuracy of IOS impressions. Purpose: This research aimed to compare the accuracy of virtual models scanned by different IOSs to determine whether jaw curvature and inter-implant distance affect accuracy. Methods: Four mandibular edentulous models were prepared by replacing the site of the missing tooth with an implant. The pr

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Bereznyak, T., and P. V. Svetlovl. "A lower bound for the distortion of a knotted curve." Journal of Mathematical Sciences 161, no. 3 (2009): 355–60. http://dx.doi.org/10.1007/s10958-009-9575-z.

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Yoganathan, Murugesu, Ejiro Emorhokpor, Thomas Kerr, A. Gupta, C. D. Tanner, and Ilya Zwieback. "Characterization of SiC Substrates Using X-Ray Rocking Curve Mapping." Materials Science Forum 527-529 (October 2006): 729–32. http://dx.doi.org/10.4028/www.scientific.net/msf.527-529.729.

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SiC substrates produced at II-VI, Inc. have been characterized using x-ray rocking curve mapping (topography). The rocking curves have been measured in the -scan mode for the (0006) Bragg reflection of 6H and the (0004) reflection of 4H SiC substrates. The maps contain information extracted from the rocking curves, such as the peak angle () and the rocking curve broadening (FWHM). In the case when lattice distortion is present due to the elastic or plastic deformation, the peak angle () changes gradually upon scanning, with the d/dx gradient proportional to the lattice curvature in the plane o

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Mei, Ting, Ziyu Xie, Shanling Lin, Bipeng Cai, and Zhixian Lin. "P‐10.6: Research on gray scale distortion correction method for hysteresis characteristics of electrowetting diaplay." SID Symposium Digest of Technical Papers 55, S1 (2024): 1249–57. http://dx.doi.org/10.1002/sdtp.17334.

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Due to the hysteresis characteristics of electrowetting display, the luminance of the same driving voltage is different in the voltage rising stage and the voltage falling stage. In this paper, a gray distortion correction method for hysteresis characteristics of electrowetting display is proposed. Firstly, by measuring the influence of hysteresis characteristics on the photoelectric curve under different voltage ranges, the hysteresis curve model of electrowetting display was established by fitting the measured data. Based on this, the driving voltage mapping relationship of the same gray sca

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Nesvidomin, A. V. "Generalized method for forming plane isotropic curves." Energy and Automation, no. 4 (September 23, 2020): 109–15. http://dx.doi.org/10.31548/energiya2020.04.109.

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The process of modeling the temperature distribution on surfaces, applying an image to curved areas with minimal distortion requires the formation of isometric grids on the plane and on the surface. One of the common ways to form planar isometric networks is to use the functions of a complex variable and planar isotropic curves, followed by separation of the real and imaginary parts. The development of computer models for the interactive search and analysis of isometric networks according to various initial geometric conditions provides a generalized method for their formation with the possibi

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Ábrahámová, Andrea, and Margita Vajsáblová. "A Comparison of Variational Projection and Cartographic Projection by Ritz’s Method." Slovak Journal of Civil Engineering 30, no. 2 (2022): 22–29. http://dx.doi.org/10.2478/sjce-2022-0011.

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Abstract The application of alternative mathematical methods in creating cartographic projections is an interesting factor, which affects the optimization of distortions and their distribution in the projected territory. This article presents the methodology for the creation and comparison of conformal cartographic projections formed by alternative mathematical methods of minimizing the integral criterion for scale distortion in Slovakia. The creation of the variational projection is based on the Airy-Kavraiskii criterion of evaluating the projection on the displayed area by solving Laplace's

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Shi, Sheng-zhe, Ting Jiang, Fan Wang, and Xiao-long Zheng. "Study on the Measured Signal Analysis Method Based on Sine Curve-fit Method for Ship Model Seakeeping Test." Journal of Physics: Conference Series 2419, no. 1 (2023): 012030. http://dx.doi.org/10.1088/1742-6596/2419/1/012030.

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Abstract Ship model seakeeping test measure data included frequency ponderances of syntonic waves, mixed waves, and white noise, which affect the test result. Heave time series and pitch time series of planning hull model seakeeping test are calculated by the three-parameter sine wave curve-fit method. Amplitude, angular frequency, and phase angle are obtained. The result shows that the distortion degrees of heave and pitch decrease gradually with an increase in wavelength; when the test wavelength is 8.8m, the distortion degrees of heave and pitch are the smallest, which reach 2.79% and 4.69%

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Longley, J. P., H. W. Shin, R. E. Plumley, et al. "Effects of Rotating Inlet Distortion on Multistage Compressor Stability." Journal of Turbomachinery 118, no. 2 (1996): 181–88. http://dx.doi.org/10.1115/1.2836624.

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In multispool engines, rotating stall in an upstream compressor will impose a rotating distortion on the downstream compressor, thereby affecting its stability margin. In this paper experiments are described in which this effect was simulated by a rotating screen upstream of several multistage low-speed compressors. The measurements are complemented by, and compared with, a theoretical model of multistage compressor response to speed and direction of rotation of an inlet distortion. For corotating distortions (i.e., distortions rotating in the same direction as rotor rotation), experiments sho

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Zhao, Shengquan, and Yaozong Liu. "Waveform Quality Evaluation Method of Variable-Frequency Current Based on Curve Fitting." Energies 15, no. 20 (2022): 7594. http://dx.doi.org/10.3390/en15207594.

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Since total harmonic distortion (THD) is mainly used as the evaluation index for the waveform quality of periodic signals, it cannot be applied to variable-frequency signals. However, there is scarce research on the evaluation methods and indicators of variable-frequency signals in the literature. In this paper, an evaluation method of the waveform distortion (WD) of variable-frequency signals based on curve fitting is proposed. First, the variable-frequency current expression of the coefficients to be optimized is obtained through theoretical derivation. Second, the coefficients are optimized

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Barbosa, Tania Alves, Alessandra Spada Durante, and Lidio Granato. "Distortion-product otoacoustic emission growth curves in neonates." Revista da Associação Médica Brasileira 60, no. 6 (2014): 591–98. http://dx.doi.org/10.1590/1806-9282.60.06.020.

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Background: The recording of otoacoustic emissions (OAE) enabled us to prove that the cochlea is able not only to receive sounds but also to produce acoustic energy. Through the use of distortion-product otoacoustic emission measurements, the growth of the response was seen according to the intensity of the sound stimulus presented (growth curve). Objective: to determine the thresholds for the emergence of distortion-product otoacoustic emissions (DPOAE) on frequencies of 2000 and 4000 Hz with a stimulus varying from 20 to 65dB SPL, and to establish the slope values obtained in the growth curv

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Li Fuqiang, 李富强, 曹东晶 Cao Dongjing, 姜海滨 Jiang Haibin, et al. "Focal Plane Curve Splicing of Large Distortion Aerospace Remote Sensing Camera." Acta Optica Sinica 40, no. 20 (2020): 2008001. http://dx.doi.org/10.3788/aos202040.2008001.

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Lan, Junqiang, Wenjun Zeng, and Xinhua Zhuang. "Operational distortion–quantization curve-based bit allocation for smooth video quality." Journal of Visual Communication and Image Representation 16, no. 4-5 (2005): 527–43. http://dx.doi.org/10.1016/j.jvcir.2004.11.013.

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Qilong, Li, Guo Xuhong, Chen Yao, Ji Wenzheng, Wang Liang, and Zhang Tao. "Mechanical Analysis of Crossbeam in a Gantry Machine Tool and its Deformation Compensation." Open Mechanical Engineering Journal 9, no. 1 (2015): 213–18. http://dx.doi.org/10.2174/1874155x01509010213.

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The beam is an important component in agantry machining center, and its deformation is believed to have asignificant impact on both the machining accuracy and the machining performance. In this research, the finite element models of a complete gantry machining center and the crossbeam are established, in whicht he restraint and boundary conditions for the finite element analysis are also introduced. It is noted thatthe impact of balance cylinders on the key components is fully considered when dealing with the force analysis. Computed results of the static characteristic analysis showed that th

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Marchese-Ragona, S. P., and M. Wörtge. "Compliance mapping of cells using force-distance (F/S) curve imaging with the AFM." Proceedings, annual meeting, Electron Microscopy Society of America 53 (August 13, 1995): 898–99. http://dx.doi.org/10.1017/s0424820100140865.

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The Atomic Force Microscope is an extremely sensitive force measuring instrument which routinely measures the force exerted on the AFM tip by the sample, with a routine force resolution in the pico Newton range. By plotting the distance that the z-piezo is extended vs. cantilever deflection (force), one can produce what is traditionally known as a force distance (F/S) curve. Analysis of the F/S curve allows one to extract information on micro elasticity and plasticity of cell surfaces as well as the magnitude of any tip-sample binding that may occur. To increase the utility of the F/S curve fo

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Jing, Shi-Lian, and Roger Stephens. "Detection of the isotopes of lithium using the Faraday effect." Canadian Journal of Chemistry 65, no. 5 (1987): 903–7. http://dx.doi.org/10.1139/v87-152.

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Lithium is atomised in an air–acetylene flame within a longitudinal magnetic field. Birefringent and dichroic signals are separately measured using a pulsed hollow cathode source. The arrangement is found to give isotopic selectivity and is useable down to concentrations of about 10 μg/mL. The signal ratio of birefringence: dichroism is found to be approximately independent of sample concentration at the high and low extremes of the calibration curve. However, severe distortions occur at intermediate concentrations. In addition, a reversal of signal magnitudes is observed between 6Li and 7Li.

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Philip, Armelle, Jacques Meyssonnier, Rafael T. Kluender, and José Baruchel. "Three-dimensional rocking curve imaging to measure the effective distortion in the neighbourhood of a defect within a crystal: an ice example." Journal of Applied Crystallography 46, no. 4 (2013): 842–48. http://dx.doi.org/10.1107/s002188981300472x.

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Rocking curve imaging (RCI) is a quantitative version of monochromatic beam diffraction topography that involves using a two-dimensional detector, each pixel of which records its own `local' rocking curve. From these local rocking curves one can reconstruct maps of particularly relevant quantities (e.g. integrated intensity, angular position of the centre of gravity, FWHM). Up to now RCI images have been exploited in the reflection case, giving a quantitative picture of the features present in a several-micrometre-thick subsurface layer. Recently, a three-dimensional Bragg diffraction imaging

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Chen, Hong Sheng, and Su Tao Zhuang. "Parameterized Modeling of Involute Helical Gear by UG Based on Symmetric Equation." Applied Mechanics and Materials 651-653 (September 2014): 792–97. http://dx.doi.org/10.4028/www.scientific.net/amm.651-653.792.

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Swept method is a commonly used parametric modeling method for helical gears. For the problem of tooth profiles distortion and parameters loss in parametric design, the symmetric equations that used to establish involutes and dedendum transition curves are proposed. The boundaries between teeth and the starting and ending angles of tooth profile curve are precisely calculated. Feature-based swept methods are applied as solutions. Instance modeling results demonstrate the accuracy of the methods and also reflect their preciseness and convenience.

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Wang, Yong Fei, Dong Fang Zhou, Yi Zhang, Yu Sun, and Jing Yuan Xu. "Predistortion Technology Used for TWTA." Advanced Materials Research 756-759 (September 2013): 760–63. http://dx.doi.org/10.4028/www.scientific.net/amr.756-759.760.

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According to the predistortion technique of travelling wave tube amplifiers (TWTAs), by analyzing TWTA model proposed by Saleh, the gain transmission function curve and phase expansion function curve of the predistortion circuit are deduced. The linear range of TWTA could be enlarged by using predistortion technique, and invariable gain together with zero phase excursions are reached at the working region of the linearized TWTA. As a kind of microwave and millimeter wave amplifiers, TWTAs find a wide utilization in communication, radar and electronic countermeasure applications. To obtain high

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Tolentino, N., D. Borges, M. R. M. Albertini, et al. "Consumption Prediction and Evaluation of Harmonic Distortion in a Hospital using Neural Networks." Renewable Energy and Power Quality Journal 21, no. 1 (2023): 280–85. http://dx.doi.org/10.24084/repqj21.297.

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This article aims to present a proposal for a methodology to analyze the energy efficiency of a hospital according to the current consumption obtained through field measurements. In addition, it aims to present the prediction of the increase in consumption over the years and correlate it with the possible increase in the harmonic distortion of stress. This analysis is essential for the studies of the connection impacts, allowing the estimation and evaluation of the energy quality through the harmonic voltage distortions over the years. The study is validated by comparing the consumption predic

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Nkado, Fredrick, and Franklin Nkado. "Power Quality and Performance Assessment of Grid-connected Photovoltaic Distributed Generation with Compliance to Stipulated Grid Integration Requirements." European Journal of Engineering and Technology Research 6, no. 7 (2021): 1–10. http://dx.doi.org/10.24018/ej-eng.2021.6.7.2628.

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Recently, the demand for electrical energy has increased more than energy production due to the growing population and industrialization. Therefore, the distributed generators integration (DGs) into the distribution system has been widely adopted. This work examines the effect of photovoltaic-based distributed generator (PV-DG) integration on power quality effect of a radial distribution system. Firstly, the capacity and optimum placement of the PV-DG units in the distribution network are determined by employing the particle swarm optimization (PSO) algorithm. Then, the impact of PV-DG integra

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Nkado, Fredrick, and Franklin Nkado. "Power Quality and Performance Assessment of Grid-connected Photovoltaic Distributed Generation with Compliance to Stipulated Grid Integration Requirements." European Journal of Engineering and Technology Research 6, no. 7 (2021): 1–10. http://dx.doi.org/10.24018/ejeng.2021.6.7.2628.

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Recently, the demand for electrical energy has increased more than energy production due to the growing population and industrialization. Therefore, the distributed generators integration (DGs) into the distribution system has been widely adopted. This work examines the effect of photovoltaic-based distributed generator (PV-DG) integration on power quality effect of a radial distribution system. Firstly, the capacity and optimum placement of the PV-DG units in the distribution network are determined by employing the particle swarm optimization (PSO) algorithm. Then, the impact of PV-DG integra

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Laura Toni. "Rate-Distortion Curve Evaluation for Cross-Layer Optimization in Progressive Video Transmission." Journal of Next Generation Information Technology 1, no. 3 (2010): 36–47. http://dx.doi.org/10.4156/jnit.vol1.issue3.5.

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Caton, D. B. "A light-curve distortion-wave analysis of eight RS Canum Venaticorum systems." Astronomical Journal 91 (January 1986): 132. http://dx.doi.org/10.1086/113992.

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Plotnikov, Alexander. "Partial Rarefaction as Way to Reduce Distortion Curve of double-glazed unit." IOP Conference Series: Earth and Environmental Science 90 (October 2017): 012127. http://dx.doi.org/10.1088/1755-1315/90/1/012127.

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