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Journal articles on the topic 'Area Fitting Method'

Author: Grafiati

Published: 4 June 2021

Last updated: 13 February 2022

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1

Wang, Chang. "Research on GPS Height Partition Fitting Method." Applied Mechanics and Materials 580-583 (July 2014): 2860–64. http://dx.doi.org/10.4028/www.scientific.net/amm.580-583.2860.

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In Diaobingshan area, Use 76 data points (geodetic height and normal height are known) as experimental data, the quadric surface fitting mean square error as GPS height partition fitting basis in the area. In 76 data points, some data points which GPS height fitting residual value is less than the quadric surface fitting mean square error in a region, other points which GPS height fitting residual value is more than the quadric surface fitting mean square error in a region, in the same time, individual regions (data points is less) use mobile triangle method to establish GPS height the fitting

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2

Peterson, T. Y., and K. A. Stelson. "The Area-Coarea Method for the Estimation of Power-Law Constitutive Parameters." Journal of Engineering for Industry 111, no. 3 (1989): 295–97. http://dx.doi.org/10.1115/1.3188763.

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A new method for estimating the power-law constitutive parameters from experimental data is presented. The algorithm is well suited to real time computation because the integrals employed can be continuously updated with new data. The method requires less computation than least squares fitting and avoids the problem of excessive weight being put on low amplitude data that is present in logarithmic least squares fitting. Because the method employs integrals, it smooths noise in the data. The method can also be extended to linear plus power-law fitting.

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3

Liu, Mao Hua, Xiao Yin, and Xui Bo Sun. "GPS Level Fitting Algorithm." Applied Mechanics and Materials 204-208 (October 2012): 2783–86. http://dx.doi.org/10.4028/www.scientific.net/amm.204-208.2783.

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The paper elaborates the principle of the GPS leveling and conventional secondary surface fitting method. It introduces dynamic weighted fitting method and MATLAB V4 interpolation fitting method. Finally, using an example, the paper makes the comparison and gets some practical significance conclusions: conventional secondary surface fitting method can be used if the area is small and its terrain is simple; the area's terrain is flat, it can use V4 interpolation and When the area's terrain is fluctuated, it can use dynamic weighted fitting method.

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4

Yuan, Xiang Rong. "2-Dimension Polynomial Fitting for the Edge Detection." Applied Mechanics and Materials 389 (August 2013): 969–73. http://dx.doi.org/10.4028/www.scientific.net/amm.389.969.

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The gray-scale digital image is two-dimension, most of the previous polynomial fitting methods for edge detection belong to one-dimension methods. The new method of two-dimension polynomial fitting for edge detection is presented. The grey level data of the interest area around the edge in the image are fitted by the two-dimension polynomial function. The edge of interest is identified by finding the maximum of the form of gradient of the fitting function. Because the two-dimension fitting is actually more suitable for the two-dimension image, the fitting results of two dimension method are si

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5

Wang, Tao, Xin Chen, Chang Tan, and Hao Fu. "Localization of Substation Fittings Based on a Stereo Vision Method." Journal of Advanced Computational Intelligence and Intelligent Informatics 22, no. 6 (2018): 861–68. http://dx.doi.org/10.20965/jaciii.2018.p0861.

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We propose a novel stereo vision method based on a fast template matching strategy to improve localization accuracy and efficiency of substation fittings. First, considering the salient features of the substation fittings that can be recognized easily, the method searches for features that are similar to the ones in the matching template related to the sub-image of the substation fittings from the global image. When the substation fittings are confirmed, the method repeatedly searches for the one of screw holes in the local region of the substation fittings. It then computes the centering coor

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6

Shi, Ping, Zhang Hua Chen, and Hong Guang Ji. "A New Method for Analysis on Geo-Stress Field Fitting." Advanced Materials Research 838-841 (November 2013): 2267–74. http://dx.doi.org/10.4028/www.scientific.net/amr.838-841.2267.

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Geo-stresses distribution of mining areas was analyzed by means of the partial least squares regression method (PLSRM). Based on the data measured in Wushaoling tunnel ridge section, numerical simulation of initial geo-stress field around the area had been done using the commercial software called ANSYS. PLSRM was achieved through actual measurement data and calculation results of geo-stress, then fitting data was ready. Compared with the traditional method of least squares, it is suggested that, due to the advantage of principal component analysis in applying PLSRM, present method can effecti

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7

Chen, Zhong Qing, Yi Fei Wang, Yi Sheng Zhu, Zong Hang Xu, and Kai Ping Song. "An Identification Method for Joint Parameters Based on Finite Element." Advanced Materials Research 690-693 (May 2013): 2866–71. http://dx.doi.org/10.4028/www.scientific.net/amr.690-693.2866.

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Aiming to solve the problem of joint surface stiffiness identification,this paper presents a finite element identification method. The method based on finite element simulation and the curve fitting principles, fitting out a curve that closed to simulation results. It can identify the joint surface stifiness effectively and rapidly based on curve fitting of simulation data in sensitivity area. This method avoid the transfer function matrix difficult to test and reverse solve problem. Comparing the results of the proposed method with the substructure synthesis method, it is shown that finite el

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8

Xu, Jingwei, Wei Hou, Shoucheng Luan, Shuting Mao, Guowei Liu, and Pengfei Ma. "Extended Peridynamics and Parameter Optimization Study Based on Moving Least Squares Method." Mathematical Problems in Engineering 2021 (March 1, 2021): 1–12. http://dx.doi.org/10.1155/2021/2595170.

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Based on the theory of peridynamics, the least squares and the moving least squares method are proposed to fit the physical information at nondiscrete points. It makes up for the shortcomings of the peridynamic method that only solves the discrete nodes and cannot obtain the physical information of other blank areas. The extended method is used to fit the one-way vibration problem of the rod, and the curve of the displacement of a nondiscrete node in the rod is extracted with time. The fitted displacement results are compared with the theoretical results to verify the feasibility of the fittin

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9

Mao, Ya Chun, Xiang Huang, Jun Yu Chen, Qun He, and Hong Bin Ma. "Research on the Method of GPS Height Conversion Based on Terrain Correction." Applied Mechanics and Materials 427-429 (September 2013): 1957–62. http://dx.doi.org/10.4028/www.scientific.net/amm.427-429.1957.

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In this paper, through the surface of polynomial fitting precision analysis, obtains fitting after converting precision for normal height is mainly affected by the rate of change vertical deflection and higher order termsalso influenced by local terrain correction. The undulating topography is deduced and the calculation formula of cause height anomaly, this method is applicable to the complex terrain of area, will dividend increase formula one of the smaller constant, the calculating process of the intermediate results are returning to normal range, effectively avoid the central region of the

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10

Yu, Jingbo, and Zhong Li. "An improved cylindrical surface fitting-related method for fault characterization." GEOPHYSICS 82, no. 1 (2017): O1—O10. http://dx.doi.org/10.1190/geo2016-0036.1.

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On the basis of the similarity of seismic waveforms and shapes of the reflectors, the coherence and curvature attributes can be derived, respectively, to characterize faults. Coherence is effective for characterizing relatively large faults. When the distortion of seismic waveforms at a fault is not obvious, the curvature attribute may play a complementary role in detecting the fault. According to geometric features of the faulted strata, the rate of change of curvature has recently been developed to improve fault characterization. Through an application to the real seismic data from the weste

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11

Zhao, Ya Hong, Jin Xing Wang, and Lu Yang Ren. "Experiment Research on Seeking Multinomial Curved Surface Fitting Model of GPS Leveling." Applied Mechanics and Materials 90-93 (September 2011): 2844–48. http://dx.doi.org/10.4028/www.scientific.net/amm.90-93.2844.

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In this paper, multinomial curved surface fitting method is used to analyze the feasibility of the GPS leveling height fitting and applicability of all kinds of models in depth. With project cases, according to the comparison and analysis based on fitting precision evaluation and the criterions of model optimization, the main applications and particular analysis methods of fitting model optimization is revealed, by which means the optimal model for the certain surveyed area is offered, conclusions of practical meaning are given, which could have positive influence on GPS practical industrializ

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12

Wu, Jian Jun, and Wen Zhen Fu. "Cutting Line Design Method for Woven Composite Materials Fitting to Free Surface." Advanced Materials Research 152-153 (October 2010): 346–52. http://dx.doi.org/10.4028/www.scientific.net/amr.152-153.346.

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On the fitting process simulation, the dangerous area related with buckling or tearing phenomena is identified with special colors and values, then deleting, cutting line designing, refitting and spreading processes are implemented to obtain a reasonable blank shape with dart feature. Moreover, a so called expanding surface method was presented in order to realize the fitting and spreading of free surface with hole feature. The above provided methods are realized through software codes and used in some cases effectively.

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13

Bovi, Marilene Leão Alves, and Sandra Heiden Spiering. "Estimating peach palm fruit surface area using allometric relationships." Scientia Agricola 59, no. 4 (2002): 717–21. http://dx.doi.org/10.1590/s0103-90162002000400015.

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Fruit surface area is an important trait in studies of developmental physiology, as well as in entomological and phytopathological research, where damage caused by insects and/or microorganisms needs to be quantified. Nonetheless, direct measurement of this trait is difficult, not very precise and destructive. This study establishes allometric relationships to estimate the surface area of peach palm (Bactris gasipaes Kunth, Palmae) fruits. Five fruits were harvested, at different maturation stages, from each of 18 plants. Image digitalization and edition methodology was adapted and compared wi

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14

Miao, Yubin, Leilei Huang, and Shu Zhang. "A Two-Step Phenotypic Parameter Measurement Strategy for Overlapped Grapes under Different Light Conditions." Sensors 21, no. 13 (2021): 4532. http://dx.doi.org/10.3390/s21134532.

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Phenotypic characteristics of fruit particles, such as projection area, can reflect the growth status and physiological changes of grapes. However, complex backgrounds and overlaps always constrain accurate grape border recognition and detection of fruit particles. Therefore, this paper proposes a two-step phenotypic parameter measurement to calculate areas of overlapped grape particles. These two steps contain particle edge detection and contour fitting. For particle edge detection, an improved HED network is introduced. It makes full use of outputs of each convolutional layer, introduces Dic

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15

Liu, Li Long, Teng Xu Zhang, Miao Zhou, Lin He, and Liang Ke Huang. "The Research of GPS Elevation Fitting Considering the Influence of Covariance Function." Applied Mechanics and Materials 568-570 (June 2014): 114–20. http://dx.doi.org/10.4028/www.scientific.net/amm.568-570.114.

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The common method to determine Quasi-Geoids is GPS leveling however the Quasi-Geoid of this method determined is a kind of trend surface which not take the physical property of geoid into consideration, and the fitting method is surface fitting which only consider the surveying error, lead to inaccurate fitting result. In allusion to these problems, Remove-restore method is used to remove the long wave information of earth gravity field model to get more smooth residual gravity height anomaly, then compared the influence of different covariance function to the fitting result of least square co

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16

He, Qun, Yong Sheng Chen, Jun Yu Chen, and Hong Bin Ma. "Research on Improving GNSS Level Fitting Accuracy of Multi-Faceted Function." Applied Mechanics and Materials 321-324 (June 2013): 663–66. http://dx.doi.org/10.4028/www.scientific.net/amm.321-324.663.

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We use various multi-faceted functions to improve fitting accuracy of GNSS level fitting. Propose a method to select kernel function, determine smooth coefficient and a law to choose kernel function node for improving fitting accuracy. We give a formula to calculate smooth coefficient and test it in plain area. The formula has practical significance to improve fitting accuracy and stability of the results.

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17

Zhang, Da W., Yi M. Li, and J. Z. H. Zhang. "Local Linear Least Square Fitting of Potential Energy Surface." Journal of Theoretical and Computational Chemistry 02, no. 02 (2003): 119–27. http://dx.doi.org/10.1142/s0219633603000525.

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A local linear least square (LLLS) method to fit multidimensional potential energy surface for quantum dynamics calculation is presented. The method uses only energy data points within a local area in multidimentional space. The potential is fit using a linear least square method with singular value decomposition. The method is tested in quantum dynamical calculation for three-dimensional H + H2 reaction. The result indicates that the local linear least square fitting is accurate and computationally efficient.

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18

Mitchell, D. R. G., and J. A. Van den Berg. "Development of an ellipse fitting method with which to analyse selected area electron diffraction patterns." Ultramicroscopy 160 (January 2016): 140–45. http://dx.doi.org/10.1016/j.ultramic.2015.10.009.

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19

Miyashita, Takashi, and Hideyasu Sumiya. "713 Occluded lris lmage Compensated Ellipse Fitting Tracking Method for Wide Area Eye lnput System." Proceedings of Ibaraki District Conference 2013.21 (2013): 205–6. http://dx.doi.org/10.1299/jsmeibaraki.2013.21.205.

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20

Chen, Rong Bao, Wei Hou, Yang Li, Xiao Er Ye, and Wu Yong Ma. "Recognition of Lanes on Complex Roads Based on Video Image." Advanced Materials Research 950 (June 2014): 298–305. http://dx.doi.org/10.4028/www.scientific.net/amr.950.298.

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In the study of vehicle safety driving assistance system,one of the most important research is recognition of lanes on complex roads . This paper is based on theories of video image processing technology which divided close-range vision for the region and the regional after preprocessing the video image of the front. The technology use the improved method of Hough detecting close area lane and removing the double edge and pseudo-edge, which get lanes through linear fitting of close range area and curve fitting method to prospect area. It builds virtual lane model based on the prediction algori

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21

Rastgou, Mostafa, Hossein Bayat, and Muharram Mansoorizadeh. "Fitting soil particle-size distribution (PSD) models by PSD curve fitting software." Polish Journal of Soil Science 52, no. 2 (2019): 211. http://dx.doi.org/10.17951/pjss.2019.52.2.211.

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This paper describes a particle-size distribution (PSD) curve fitting software for analyzing the soil PSD and soil physical properties. A better characterization of soil texture can be obtained by describing the soil PSD using mathematical models. The mathematical equations of soil PSD are mainly used as a basis to estimate the soil hydraulic properties. Until now, many attempts are made to represent PSD curves using mathematical models, but selecting the best PSD model requires fitting all models to the PSD data, which would be difficult and time-consuming. So far, no specific program has bee

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22

Sun, Jin Guang, and Yu Cheng Zhou. "Skin Color Detection Method Based on Direct Least Square Ellipse Fitting in CrCbCg Space." Advanced Materials Research 366 (October 2011): 28–31. http://dx.doi.org/10.4028/www.scientific.net/amr.366.28.

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Skin color detection is an important in computer vision.This work presents a new efficient method for skin color detection based on an improved direct least square ellipse fitting in the space CrCbCg. The color distribution statistics of three-dimensional CrCbCg is obtained by fitting the color distribution ellipse boundary in the Cr-Cb, Cr-Cg, Cb-Cg plane exactly ,finally ,the criteria based on the statistics is used to detect skin color area accurately. Experimental results show that this method improves the robustness of the skin color detection to complex environment.

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23

Chen, R. C.-C., and M. Lord. "A comparison of trial shoe and shell shoe fitting techniques." Prosthetics and Orthotics International 19, no. 3 (1995): 181–87. http://dx.doi.org/10.3109/03093649509168002.

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In Europe, bespoke orthopaedic shoes are usually sent for a trial fitting in order to check the fit and indicate any modifications required before final finishing. The use of shell shoes at the fit assessment stage, rather than the traditional alternative of partially or fully finished shoes, can offer service advantages, and is widely used for example in the Netherlands. However the comparability of shell fit assessment with the traditional method of trial shoe fit assessment has not been evaluated, either to assess its sensitivity or to elucidate any difference in assessment technique requir

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24

Hutzschenreuter, Daniel, Frank Härtig, and Markus Schmidt. "An SQP method for Chebyshev and hole-pattern fitting with geometrical elements." Journal of Sensors and Sensor Systems 7, no. 1 (2018): 57–67. http://dx.doi.org/10.5194/jsss-7-57-2018.

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Abstract. A customized sequential quadratic program (SQP) method for the solution of minimax-type fitting applications in coordinate metrology is presented. This area increasingly requires highly efficient and accurate algorithms, as modern three-dimensional geometry measurement systems provide large and computationally intensive data sets for fitting calculations. In order to meet these aspects, approaches for an optimization and parallelization of the SQP method are provided. The implementation is verified with medium (500 thousand points) and large (up to 13 million points) test data sets.

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25

Xie, Jiatong, Qirong Qin, Cunhui Fan, Dongfeng Hu, and Hu Li. "The quantitative prediction of tectonic fractures of Longmaxi formation in Dingshan area, southeastern Sichuan Basin." Earth Sciences Research Journal 23, no. 2 (2019): 157–62. http://dx.doi.org/10.15446/esrj.v23n2.79957.

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Tectonic fractures are a significant factor for production of the Longmaxi formation in Dingshan area. The analyse of the distribution and development degree of tectonic fractures is the main research method in present-day. Based on the data of field outcrops and borehole core, the new method-binary method is put forward by rock fracture and energy value to decide tectonic fracture development. According to the method the fitting formula is offered between the relation of the value of rock fracture, energy and the fracture density. Compared the fracture density predictive value and the observe

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26

Zhou, Qingyan, Lili He, and Junhong Zheng. "Three - dimensional garment virtual fitting method with local area geometric feature enhancement based on Voronoi diagram." IOP Conference Series: Earth and Environmental Science 252 (July 9, 2019): 022096. http://dx.doi.org/10.1088/1755-1315/252/2/022096.

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27

Abbaszadeh, Maliheh, and Ardeshir Hezarkhani. "Enhancement of hydrothermal alteration zones using the spectral feature fitting method in Rabor area, Kerman, Iran." Arabian Journal of Geosciences 6, no. 6 (2011): 1957–64. http://dx.doi.org/10.1007/s12517-011-0495-0.

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28

Huang, Tiemei, Qing Han, Weidong Min, Xiangpeng Li, Yunjun Yu, and Yu Zhang. "Loitering Detection Based on Pedestrian Activity Area Classification." Applied Sciences 9, no. 9 (2019): 1866. http://dx.doi.org/10.3390/app9091866.

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Loitering detection can help recognize vulnerable people needing attention and potential suspects harmful to public security. The existing loitering detection methods used time or target trajectories as assessment criteria, and only handled some simple loitering circumstances because of complex track. To solve these problems, this paper proposes a loitering detection method based on pedestrian activity area classification. The paper first gave loitering definition from a new perspective using the size of pedestrian activity area. The pedestrian loitering behaviors were divided into three categ

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29

Wang, Jingli, Huiyuan Zhang, Jingxiang Gao, and Dong Xiao. "Dust Removal from 3D Point Cloud Data in Mine Plane Areas Based on Orthogonal Total Least Squares Fitting and GA-TELM." Computational Intelligence and Neuroscience 2021 (September 13, 2021): 1–8. http://dx.doi.org/10.1155/2021/9927982.

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With the further development of the construction of “smart mine,” the establishment of three-dimensional (3D) point cloud models of mines has become very common. However, the truck operation caused the 3D point cloud model of the mining area to contain dust points, and the 3D point cloud model established by the Context Capture modeling software is a hollow structure. The previous point cloud denoising algorithms caused holes in the model. In view of the above problems, this paper proposes the point cloud denoising method based on orthogonal total least squares fitting and two-layer extreme le

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30

Kandasamy, Sivasathivel, Philippe Neveux, Aleixandre Verger, Samuel Buis, Marie Weiss, and Frédéric Baret. "Improving the Consistency and Continuity of MODIS 8 Day Leaf Area Index Products." International Journal of Electronics and Telecommunications 58, no. 2 (2012): 141–46. http://dx.doi.org/10.2478/v10177-012-0020-8.

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Improving the Consistency and Continuity of MODIS 8 Day Leaf Area Index Products Time Series Analysis of Leaf Area Index (LAI) is vital to the understanding of global vegetation dynamics. The LAI time series derived from satellite observations are usually not complete and noisy due to cloud contamination and uncertainties in the retrieval techniques. In this paper, the continuity and consistency of the MODIS 8 day LAI products are improved using a method based on Caterpillar Singular Spectrum Analysis. The proposed method is compared with other standard methods: Savitzky-Golay filter, Empirica

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31

Yang, Yao Zong, Fang Fang, Jian Feng He та Jun Jun Ran. "A Study of the Peak Boundary Method and Effect Evaluation Based on NaI(TI) Detector for γ-Spectrum Analysis". Applied Mechanics and Materials 347-350 (серпень 2013): 1006–11. http://dx.doi.org/10.4028/www.scientific.net/amm.347-350.1006.

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In order to accurately analyze the result, which comes from quantitative and qualitative detection based on gamma energy spectrum of NaI(T1) detector, peak boundary has become one of the main factors which influence the spectrum analysis. By implementing some common boundary determining algorithms in the Matlab such as simple comparison method, derivative method, symmetry zero-area method, the full width method and gaussian function fitting method, as well as comparing effectiveness among those algorithm, priority of those boundary algorithms is evaluated. At the same time, because the boundar

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32

Boyd, Albert V. "Fitting the Truncated Pareto Distribution to Loss Distributions." Journal of the Staple Inn Actuarial Society 31 (March 1988): 151–58. http://dx.doi.org/10.1017/s2049929900010291.

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Hogg and Klugman use the truncated Pareto distribution with probability density functionwhere δ≥0 is specified and α > 0 and λ > 0 are unknown parameters, to describe insurance claims. This is fitted first of all by the method of moments, using the estimatorsand where is the mean of a simple random sample, and the (biased) varianceThe authors then suggest, on pp. 113–16, that these estimates be used as starting values in a Newton iteration to get the maximum likelihood estimates of the parameters, but this technique can fail as a result of convergence problems. The object of this note is

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33

Hang, Cheng, Xiu Lan Sun, Yu Zhu Shang, and Mao Lei. "The Stochastic Simulation Prediction Method for Landslide." Advanced Materials Research 971-973 (June 2014): 2255–58. http://dx.doi.org/10.4028/www.scientific.net/amr.971-973.2255.

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Based on the rainfall infiltration and slope stability analysis theory and method of finite element, the landslide early warning and forecast models established empirical and adopt advanced Intensity - at home and abroad for the first time Duration of statistical curve as the latest forecast method, mountain hilly area rainfall condition, the author of this paper high frequency of natural disasters such as landslide and debris flow problems. Results show that the curve fitting mathematical types as piecewise function form its expression changes over rainfall intensity and conform to the actual

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34

Gonzaga, Marcos Roberto, and Carl Paul Schmertmann. "Estimating age- and sex-specific mortality rates for small areas with TOPALS regression: an application to Brazil in 2010." Revista Brasileira de Estudos de População 33, no. 3 (2016): 629–52. http://dx.doi.org/10.20947/s0102-30982016c0009.

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High variability in recorded vital events creates serious problems for small-area mortality estimation by age and sex. Many existing approaches to fitting local mortality schedules, including those most often used in Brazil, estimate rates by making rigid mathematical assumptions about local age patterns. Such methods assume that all areas within a larger area (for example, microregions within a mesoregion) have identically-shaped log mortality schedules by age. We propose a more flexible statistical estimation method that combines Poisson regression with the TOPALS relational model (DE BEER,

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Liu, Zhen, Sheng Chun Liu, Kuan Jun Zhu, and Hai Jun Niu. "Study on Improvement of Abrasion Resistant Performance of Fitting." Advanced Materials Research 616-618 (December 2012): 1830–35. http://dx.doi.org/10.4028/www.scientific.net/amr.616-618.1830.

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Serious abrasion occurs in power transmission lines in gale, more wind area, mountain micro- terrain meteorological zone in Xinjiang and coastal monsoon zone in our country in recent year. Carry out analysis on reasons of serious abrasion of the fittings under action of gale. Develop research on improvement of abrasion resistant performance of the fittings, forward method to improve abrasion resistant performance of the fittings from structure, materials and process etc aspects.

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36

Schumacher, Ricardo, Gustavo H. C. Oliveira, and Roman Kuiava. "A multi-signal instrumental variable vector fitting method for estimating inter-area electromechanical modes of power systems." International Journal of Electrical Power & Energy Systems 111 (October 2019): 1–13. http://dx.doi.org/10.1016/j.ijepes.2019.03.037.

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Afanas’ev, Viktor P., Yuliya N. Bodisko, Aleksandr S. Gryazev, Pavel S. Kaplya, and Martin Koeppen. "Determining the Relative Concentration of Deuterium Implanted in Beryllium Based on the Elastic Peak Electron Spectroscopy." Vestnik MEI 5, no. 5 (2020): 89–97. http://dx.doi.org/10.24160/1993-6982-2020-5-89-97.

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The relative concentration of deuterium implanted in beryllium is determined on the basis of the elastic peak electron spectroscopy. To consistently determine the energy spectra of reflected electrons, the method of partial intensities is used, which is based on solving the boundary problem for the transport equation by the invariant imbedding method. The differential inelastic scattering cross sections are reconstructed using a fitting procedure based on the multiple solution of the direct problem with fitting parameters. High efficiency of the fitting procedure is achieved through constructi

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38

Aronica, G., M. Bureau, E. Athanassoula, and R. J. Dettmar. "Vertical surface brightness profiles of boxy bulges." Proceedings of the International Astronomical Union 3, S245 (2007): 129–30. http://dx.doi.org/10.1017/s1743921308017456.

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AbstractThe thickening of the bar in barred disk galaxies has a strong influence in shaping the morphology in the inner regions of a disk galaxy above the galactic plane. The result of such a secular evolutionary process can be observed in galaxies with box/peanut shaped (b/ps) bulges. We have applied a one–dimensional fitting method to our sample of 30 edge–on disk galaxies using different fitting function approaches. A clear increase in scale height can be observed in the area of the most prominent b/ps isophotes compared to the neighbouring disk and bulge areas, in agreement with the predic

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Syuhada, Fahmi Syuhada, and Agus Zainal Arifin. "Automatic Segmentation of Dental Cone Beam Computed Tomography Image Based on Level Set Method Using Morphology Operators and Polynomial Fitting." Journal of Computer Science and Informatics Engineering (J-Cosine) 4, no. 1 (2020): 45–52. http://dx.doi.org/10.29303/jcosine.v4i1.321.

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Abstract Automatic Segmentation of dental cone beam computed tomography (CBCT) images is challenging due to the intensity of the teeth that have low level intensity. In this paper we proposes a new method for automatic teeth segmentation in slices of CBCT images based on level let method using morphology operators and polynomial fitting. Morphology operators are used to construct the Region of Interest (ROI) area of dental objects in the image slice. ROI is used to focus the analysis process on areas of dental objects which generally have a polynomial pattern distribution. Polynomial fitting i

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Lin, Yi Xuan. "The Overlay Deployment Model under Interference Based on Marginal Fitting." Applied Mechanics and Materials 536-537 (April 2014): 760–70. http://dx.doi.org/10.4028/www.scientific.net/amm.536-537.760.

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Under the condition of interference, when to optimize the network deployment with the energy of the radiation characteristics of node, it is significant to improve the efficiency of the objective function evaluation.The overlap deployment model based on the compression projection is put forward in this paper, including the projection grid model based on the margin fitting, and the fusion boundary generation based on the projection grid, measurement of covered area and overlap coefficient evaluation algorithm to provide the efficient algorithm for the calculation of optimization goals such as t

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Woirgard, J., and J.-C. Dargenton. "An alternative method for penetration depth determination in nanoindentation measurements." Journal of Materials Research 12, no. 9 (1997): 2455–58. http://dx.doi.org/10.1557/jmr.1997.0324.

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The information provided by the shape of the unloading portion of indentation curves is used to calculate the area of contact between the indenter and the material. Results obtained in fused silica and nickel, including Young's modulus and hardness values, are presented to illustrate the validity of the approach. It is shown that errors of only a few percent are introduced when fitting unloading curves with power laws. The present method is especially useful when direct specimen stiffness measurements can be performed.

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Menth, Martin. "A family of Fitting classes of supersoluble groups." Mathematical Proceedings of the Cambridge Philosophical Society 118, no. 1 (1995): 49–57. http://dx.doi.org/10.1017/s0305004100073448.

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A class of groups that is closed with respect to subnormal subgroups and normal products is called a Fitting class. Given a finite soluble group G, one may ask for the Fitting class (G) generated by G, that is the intersection of all Fitting classes containing G. For simple or nilpotent groups G it is easy to compute (G), but in other cases the determination of (G) seems to be surprisingly difficult, and there is no general method of solving this problem. In recent years there has been a lot of work in this area, see for instance Bryce and Cossey[l], [2], Hawkes[6] (or [5], IX. 9. Var. II), He

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ZHANG, JASON Z., Q. M. JONATHAN WU, and WILLIAM A. GRUVER. "ACTIVE HEAD TRACKING BASED ON CHROMATIC SHAPE FITTING." International Journal of Pattern Recognition and Artificial Intelligence 17, no. 04 (2003): 529–44. http://dx.doi.org/10.1142/s0218001403002563.

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This paper presents a method for tracking a human head based on the integration of camera saccade and chromatic shape fitting, which are implemented as functional modules in an active tracking system. Head motion is detected in the saccade module by extracting edges from two successive images. The position of the head in the current image is approximated as the centroid of the apparition formed by the moving edges of the target. A visual position cue is used to drive a pan/tilt camera to perform real-time saccade keeping the target in the foveal area in the image. The shape-fitting module is i

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Wang, Houjun, Hui Liu, Ning Ding, Pingping Jing, and Guangyu Li. "An Efficient Segmentation Method for Mariculture Areas on Airborne SAR Images." Marine Technology Society Journal 53, no. 3 (2019): 30–38. http://dx.doi.org/10.4031/mtsj.53.3.10.

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AbstractIn this paper, the problems of mariculture area segmentation and corresponding area value estimations are investigated on the basis of airborne synthetic aperture radar (SAR) images. In order to deal with a limited amount of noisy airborne SAR image data in an efficient way, an effective coarse-to-fine approach is proposed, consisting of three major components, including (1) an adaptive segmentation method for each local patch to remove noise from the ocean background, (2) a dynamic coarse-to-fine clustering method for grouping pixels to achieve image segments, and (3) a polygon-fittin

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Fan, Li-Li, Bin Wang, and Xian-Qing Lv. "Cotidal Charts near Hawaii Derived from TOPEX/Poseidon Altimetry Data." Journal of Atmospheric and Oceanic Technology 28, no. 4 (2011): 606–14. http://dx.doi.org/10.1175/2010jtecho809.1.

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Abstract Harmonic analysis of 10 yr of Ocean Topography Experiment (TOPEX)/Poseidon (T/P) along-track altimetry is performed to derive the semidiurnal and diurnal tides (M2, S2, N2, K2, K1, O1, P1, and Q1) near Hawaii. The T/P solutions are evaluated through intercomparison for crossover points of the ascending and descending tracks and comparison with the data of tidal stations, which show that the T/P solutions in the study area are reliable. By using a suitable order polynomial to fit the T/P solutions along every track, the harmonic constants of any point on T/P tracks are acquired. A new

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Dong, Y. H., and P. Scardi. "MarqX: a new program for whole-powder-pattern fitting." Journal of Applied Crystallography 33, no. 1 (2000): 184–89. http://dx.doi.org/10.1107/s002188989901434x.

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MarqXis a computer program for the modelling of powder diffraction data. It can be used for an unconstrained profile fitting (pattern decomposition, PD) or constrained modelling of the whole powder pattern (Pawley method, PM), for single- as well as multiple-phase samples. The program output includes: lattice parameters or peak positions (for PM and PD, respectively), width and shape of the diffraction peak (in terms of half width at half-maximum and mixing parameter of a pseudo-Voigt function), corrected for the instrumental broadening component, intensity, peak area and profile asymmetry. In

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Jia, Danping, Ximeng Gao, and Chunhua Li. "Study Of Algorithms Of Oil Immersed Transformer Temperature Measurement Technology." Cybernetics and Information Technologies 14, no. 5 (2014): 88–97. http://dx.doi.org/10.2478/cait-2014-0046.

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Abstract In the paper presented the temperature of an oil-immersed transformer was measured, based on the principles of the fluorescence afterglow life. Three methods were used to calculate the fluorescence afterglow life τ by using the least squares method, the integral area ratio method and Prony algorithm. The leastsquare method, the integral area ratio method and the program of Prony algorithm are written using Matlab and C++. The Least-square fitting is susceptible to the influence of the DC component. When the DC location is different, the fluorescence afterglow life τ values vary widely

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Lee, Jessica C., Llewellyn Mills, Brett K. Hayes, and Evan J. Livesey. "Modelling generalisation gradients as augmented Gaussian functions." Quarterly Journal of Experimental Psychology 74, no. 1 (2020): 106–21. http://dx.doi.org/10.1177/1747021820949470.

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Studying generalisation of associative learning requires analysis of response gradients measured over a continuous stimulus dimension. In human studies, there is often a high degree of individual variation in the gradients, making it difficult to draw conclusions about group-level trends with traditional statistical methods. Here, we demonstrate a novel method of analysing generalisation gradients based on hierarchical Bayesian curve-fitting. This method involves fitting an augmented (asymmetrical) Gaussian function to individual gradients and estimating its parameters in a hierarchical Bayesi

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Yang, K. Y., L. L. Liu, and L. K. Huang. "RESEARCH ON GPS HEIGHT FITTING BASED ON LINEAR REGRESSION MODEL." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-3/W10 (February 8, 2020): 1189–95. http://dx.doi.org/10.5194/isprs-archives-xlii-3-w10-1189-2020.

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Abstract. This paper mainly expounds the parameter estimation method, the outlier diagnosis and the establishment of the optimal regression equation in the linear regression model theory, the analysis of the principle of the polynomial fitting model, the derivation of the algorithm process, and the research on the accuracy evaluation method.The GPS survey area is fitted and calculated. The fitting model is analyzed and compared in detail. The better parameter values and regression equation models of the planar region are estimated. The fitting accuracy meets the requirements of the fourth leve

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Ye, Fu Li, and Gui Lian Shi. "Applying Surface Fitting in the Medical Thermal Texture Maps." Applied Mechanics and Materials 263-266 (December 2012): 2448–53. http://dx.doi.org/10.4028/www.scientific.net/amm.263-266.2448.

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This paper studies the application of surface fitting technology in medical tomography. In clinical research, in the result of early detection of cancer increasingly critical, the accuracy and efficiency become the most important issues in medical tomography. However, recent research on medical tomography only use curve fitting technology and only can fit single point heat source, which cause the analyzed result not accurate enough and complex the process of medical tomography. To improve the problem, surface fitting technology is applied in medical tomography, and then information of multiple

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