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Journal articles on the topic 'Coefficient of variation'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Singh, Abhishek, Eid Sadun Alotaibi, and Muhammad Aslam. "Evaluating the Consistency of Neutrosophic Data Using Various Statistical Distributions: Comparative Studies and Applications." International Journal of Analysis and Applications 23 (July 16, 2025): 170. https://doi.org/10.28924/2291-8639-23-2025-170.

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In this paper, we primarily have given neutrosophic coefficient of variation, robust neutrosophic coefficient of variation concern to interquartile range, and robust neutrosophic coefficient of variation concern to median absolute deviation. Following the introduction, we have explored the methods of neutrosophic coefficient of variation, which is an effective method for modeling data that is fuzzy, imprecise, and uncertain. For the comparative study, we have given numerical studies based on neutrosophic distributions including discrete and continuous distributions. First, we have compared all

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2

Josoa Michel, Tovohery, Totohasina Andre, and Feno Daniel Rajaonasy. "The Distribution Law of Sharma's Coefficient of Variation." International Journal of Science and Research (IJSR) 11, no. 1 (2022): 817–21. http://dx.doi.org/10.21275/sr22114164739.

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3

Nazeer, M. "HYDRAULIC PERFORMANCE OF TRICKLE IRRIGATION EMITTERS UNDER FIELD CONDITION." Nucleus 47, no. 3 (2010): 247–52. https://doi.org/10.71330/thenucleus.2010.890.

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The efficiency of trickle irrigation system depends on the uniform distribution of water through mechanical device, the emitter. The aim of this research study was to compare and evaluate the hydraulic performance of pressurecompensating and non pressure-compensating emitters under field condition. Both types of emitters were subjected to different operating pressures (50,100,150,200 and 250KPa) of the water source. Three hydraulic performance parameters including manufacturerâ€™s coefficient of variation, hydraulic designâ€™s coefficient of variation and total coefficient of variation were te

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4

Underhill, Leslie G. "The coefficient of variation biplot." Journal of Classification 7, no. 2 (1990): 241–56. http://dx.doi.org/10.1007/bf01908718.

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5

Karim, Md Rezaul, and Meherun Nesa. "Genetic Variability, Character Association and Path Aoefficient Analysis of Sweet Pepper (Capsicum Annuum L.) Germplasms." Journal of Science and Technology Research 3, no. 1 (2022): 95–102. http://dx.doi.org/10.3329/jscitr.v3i1.62811.

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The present investigation was carried out to investigate the genetic variability, character association, correlation and path coefficient analysis among thirty accessions of sweet pepper. Significant variations were observed for different morphological traits, yield and yield attributes among the accessions studied. For all the characters, genotypic coefficient of variation (GCV) was smaller than phenotypic coefficient of variation (PCV). The highest genotypic and phenotypic coefficients of variations were recorded in case of number of fruit per plant (46.37 and 47.66%) followed by fruit yield

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6

Li, Damei, and Willi H. Hager. "Correction coefficients for uniform channel flow." Canadian Journal of Civil Engineering 18, no. 1 (1991): 156–58. http://dx.doi.org/10.1139/l91-018.

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The kinetic energy and momentum correction coefficients are considered. After a review of pertinent literature, the discussion is restricted to uniform open channel flow. It is found both theoretically and experimentally that the coefficients depend significantly on the Manning roughness coefficient, and that the kinetic energy correction coefficient may directly be related to the momentum correction coefficient. Further, the effect of local variation of correction coefficients is much smaller than the variation of dynamic pressure times the correction coefficient. Therefore, the concept of co

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7

Zemel, Désirée, Raymond T. Krediet, Gerardus C. M. Koomen, Dirk G. Struijk, and Lambertus Arisz. "Day-To-Day Variability of Protein Transport Used as a Method for Analyzing Peritoneal Permeability in CAPD." Peritoneal Dialysis International: Journal of the International Society for Peritoneal Dialysis 11, no. 3 (1991): 217–23. http://dx.doi.org/10.1177/089686089101100306.

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The transperitoneal transport of macromolecules is dependent on both effective peritoneal surface area and intrinsic permeability of the peritoneum. For passage of small solutes, the effective surface area is the main determinant. We hypothesized that day-to-day variations in peritoneal clearances are caused by changes in the effective surface area and not in the intrinsic permeability. Four CAPD {continuous ambulatory peritoneal dialysis) patients without peritonitis were investigated on 28 consecutive days. Concentrations of beta-2-microglobulin, albumin, IgG, and alpha-2-macroglobulin were

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8

Zhang, Xiaolei, Yu Zhu, Haoran Wu, Zhengzheng Bi, and Zhiheng Xu. "Characteristics of Vegetation Resistance Variation in Muddy Water Flows." Water 15, no. 12 (2023): 2238. http://dx.doi.org/10.3390/w15122238.

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The shoal area of the lower Yellow River in China is not flooded with water during the dry season, so various plants can grow. When floods overflow the plains in the flood season, the complexity of water resistance is increased due to the resistance to water flow by vegetation, which directly affects flood discharge in the beach area. The drag force coefficient (CD), Manning’s roughness coefficient (n), and Darcy-Weisbach resistance coefficient (f) are commonly used to characterize vegetation drag force. Such studies are commonly conducted in clear water, but flood water in the lower Yellow Ri

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9

Sangngam, Prayad. "Ratio Estimators Using Coefficient of Variation and Coefficient of Correlation." Modern Applied Science 8, no. 5 (2014): 70. http://dx.doi.org/10.5539/mas.v8n5p70.

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This paper introduces ratio estimators of the population mean using the coefficient of variation of study variable and auxiliary variables together with the coefficient of correlation between the study and auxiliary variables under simple random sampling and stratified random sampling. These ratio estimators are almost unbiased. The mean square errors of the estimators and their estimators are given. Sample size estimation in both sampling designs are presented. An optimal sample size allocation in stratified random sampling is also suggested. Based on theoretical study, it can be shown that t

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10

Banik, Shipra, B. M. Golam Kibria, and Dinesh Sharma. "Testing the Population Coefficient of Variation." Journal of Modern Applied Statistical Methods 11, no. 2 (2012): 325–35. http://dx.doi.org/10.22237/jmasm/1351742640.

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11

Hong, Zhipeng, Wei Hao, Liang He, Yinuo Zhang, and Zhaoyu Wen. "Analysis of Rock Friction Coefficient Characteristics Based on Friction Experimental Equipment." Rock Mechanics Letters 2, no. 2 (2025): 110–20. https://doi.org/10.70425/rml.202502.15.

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Friction coefficient, as a parameter of mechanical state, plays a crucial role in the shear failure of rocks in the field of Earth sciences. This paper investigates the frictional characteristics and anisotropy of rock by analyzing the coefficient of variation of the friction coefficient (f) and the anisotropy index of rock friction coefficients Af. Rotational friction tests were conducted using cylindrical granite against square samples of granite, sandstone, and andesite in three directions to analyze the relationship between the friction coefficient and various drilling parameters. This stu

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12

Kuban, Karl C. K., Helen Skouteli, Allen Cherer, et al. "Hemorrhage, Phenobarbital, and Fluctuating Cerebral Blood Flow Velocity in the Neonate." Pediatrics 82, no. 4 (1988): 548–53. http://dx.doi.org/10.1542/peds.82.4.548.

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Fifty-one sequential intubated babies with birth weights of less than 1,751 were evaluated by serial Doppler ultrasound during the first three days of life. These babies were part of a phenobarbital prophylaxis trial cohort study. Subependymal-intraventricular hemorrhage developed in 17 of the babies. Infants with subependymal-intraventricular hemorrhage, whether or not they received pancuronium or phenobarbital, had coefficients of variation comparable to those of babies without hemorrhage. Coefficient of variation values of the right were comparable to values obtained from the left anterior

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13

Parvini, Mehdi, and Dieter F. E. Stolle. "Application of Stochastic Finite-Element Method to Deflection Analysis of Pavement Structures." Transportation Research Record: Journal of the Transportation Research Board 1540, no. 1 (1996): 65–71. http://dx.doi.org/10.1177/0361198196154000109.

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The effect of random variations in layer properties of a pavement-subgrade system on surface deflections is investigated. This is done by using a stochastic finite-element framework based on the perturbation method. The Taylor's expansion scheme is used. The variations of the surface deflections are related to the variations of layer moduli via a coefficient matrix, thereby allowing an investigation of the sensitivity of measured deflections to the variation of pavement and subgrade moduli. The analyses confirm that surface deflections are not very sensitive to variations of modulus within the

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14

Perko, Janez, and Ravi A. Patel. "Diffusion velocity lattice Boltzmann formulation applied to transport in macroscopic porous media." International Journal of Modern Physics C 25, no. 12 (2014): 1441006. http://dx.doi.org/10.1142/s012918311441006x.

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This paper describes the application of a single relaxation time (SRT) lattice Boltzmann scheme to the transport in porous media with large spatial variations of diffusion coefficients. Effective diffusion coefficients can vary substantially within porous media because of their dependence on porosity and tortuosity which can span over several orders of magnitude, depending on pore size and connectivity. Moreover, when mass is transported with pore-water in porous media, the hydrodynamic dispersion, which depends on Darcy's velocity, contributes additionally to the usually anisotropic variation

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15

Bretz, F., V. Guiard, L. A. Hothorn, and G. Dilba. "Simultaneous Confidence Intervals for Ratios with Applications to the Comparison of Several Treatments with a Control." Methods of Information in Medicine 43, no. 05 (2004): 465–69. http://dx.doi.org/10.1055/s-0038-1633899.

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Summary Objectives: In this article, we illustrate and compare exact simultaneous confidence sets with various approximate simultaneous confidence intervals for multiple ratios as applied to many-to-one comparisons. Quite different datasets are analyzed to clarify the points. Methods: The methods are based on existing probability inequalities (e.g., Bonferroni, Slepian and Šidàk), estimation of nuisance parameters and re-sampling techniques. Exact simultaneous confidence sets based on the multivariate t-distribution are constructed and compared with approximate simultaneous confidence interval

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16

Cardin, Sylvie, and Francis Minvielle. "Selection on phenotypic variation of pupa weight in Tribolium castaneum." Canadian Journal of Genetics and Cytology 28, no. 5 (1986): 856–61. http://dx.doi.org/10.1139/g86-119.

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Responses to selection for high and low intrafamily coefficients of variation of pupa weight in Tribolium castaneum were observed for 10 generations. A significant decrease of the coefficient of variation has been observed in the replicated lines selected downwards while no response occurred in the other lines. Mean pupa weights did not change significantly throughout the experiment while mean fertility decreased in all lines, probably as a consequence of inbreeding depression. Realized heritability of the coefficient of variation of pupa weight was 0.15 ± 0.04 and 0.03 ± 0.01% for the downwar

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17

Liang, Yan, Chao Liu, Tong Lu Li, and Ping Li. "The Effect of the Filling Caves on Loess Slope Stability in Irrigation." Advanced Materials Research 753-755 (August 2013): 648–52. http://dx.doi.org/10.4028/www.scientific.net/amr.753-755.648.

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Landslides are serious geological disasters in loess areas. In order to study the effect of the filling caves in the edge of loess tableland on loess slope stability, the slope stability of sliding from the caves was calculated in irrigation when caves were filled with compacted soil, lime soil, lime-ash soil and non-filled. The results show when caves are filled with lime soil the slope stability is the highest. The effects of variability of the physical and mechanical property indexes of caver filler on loess slope stability were researched further. The results show that (1) the variation co

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18

Dolin, L. S. "On the Influence of Spatial Fluctuations of the Water Inherent Optical Properties on the Energy of a Lidar Echo Signal Coming from a Water." Fundamental and Applied Hydrophysics 16, no. 1 (2023): 35–47. http://dx.doi.org/10.59887/fpg/1gan-g7mu-dk9p.

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Theoretical models of the statistical characteristics of the lidar echo signal have been developed to interpret the results of optical sounding of heavily eutrophicated water bodies. Formulas are obtained for calculating the statistically average value and coefficient of variation of the energy of the elastic backscattering signal coming from the near-surface layer of water with randomly inhomogeneous absorption and scattering coefficients. Examples of the dependence of the indicated signal characteristics on the coefficients of variation of the optical characteristics of water are given. It h

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19

Rao, S., and C. R. Houska. "X-ray particle-size broadening." Acta Crystallographica Section A Foundations of Crystallography 42, no. 1 (1986): 6–13. http://dx.doi.org/10.1107/s0108767386099981.

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X-ray diffraction profiles and Fourier coefficients are given for particles distributed according to experimentally verified size distributions. Calculations are based upon the log normal distribution of sphere diameters and intercept lengths in addition to a normal distribution of column heights. It is found that the diffraction profile is not sensitive to the fine details of the distribution but rather the mean column height and the column-height variation coefficient. Errors in particle-size determinations will result from an improper choice of the variation coefficient. Two simplified mode

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20

Zaami, Amin, Martin Schäkel, Ismet Baran, Ton C. Bor, Henning Janssen, and Remko Akkerman. "Temperature variation during continuous laser-assisted adjacent hoop winding of type-IV pressure vessels: An experimental analysis." Journal of Composite Materials 54, no. 13 (2019): 1717–39. http://dx.doi.org/10.1177/0021998319884101.

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Laser-assisted tape winding is an automated process to produce tubular or tube-like continuous fiber-reinforced polymer composites by winding a tape around a mandrel or liner. Placing additional layers on a previously heated substrate and variation in material and process parameters causes a variation in the bonding temperature of fiber-reinforced thermoplastic tapes which need to be understood and described well in order to have a reliable manufacturing process. In order to quantify the variation in this critical bonding temperature, a comprehensive temperature analysis of an adjacent hoop wi

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21

Santos, Carla, and Cristina Dias. "Note on the coefficient of variation properties." BRAZILIAN ELECTRONIC JOURNAL OF MATHEMATICS 2, no. 4 (2021): 101–11. http://dx.doi.org/10.14393/bejom-v2-n4-2021-58062.

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The extent to which the values within the dataset differ from one another and from the mean value itself is revealed through measures of variability. One common measure of variability is the coefficient of variation, which expresses the standard deviation as a proportion of the mean and does not depend on the unit scales. Exploiting its potential as a unitless measure of variability, the coefficient of variation has been used as risk sensitivity measure, to represent the reliability of trials, and for other purposes. In different frameworks, the coefficient of variation can be used when a sing

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22

Bendel, R. B., S. S. Higgins, J. E. Teberg, and D. A. Pyke. "Comparison of skewness coefficient, coefficient of variation, and Gini coefficient as inequality measures within populations." Oecologia 78, no. 3 (1989): 394–400. http://dx.doi.org/10.1007/bf00379115.

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23

Thangjai, Warisa, Sa-Aat Niwitpong, and Suparat Niwitpong. "Confidence intervals for the common coefficient of variation of rainfall in Thailand." PeerJ 8 (September 21, 2020): e10004. http://dx.doi.org/10.7717/peerj.10004.

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The log-normal distribution is often used to analyze environmental data like daily rainfall amounts. The rainfall is of interest in Thailand because high variable climates can lead to periodic water stress and scarcity. The mean, standard deviation or coefficient of variation of the rainfall in the area is usually estimated. The climate moisture index is the ratio of plant water demand to precipitation. The climate moisture index should use the coefficient of variation instead of the standard deviation for comparison between areas with widely different means. The larger coefficient of variatio

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24

Tesfaye, Diribu, Demissew Abakemal, and Ermias Habte. "Genetic variability, heritability and genetic advance estimation of highland adapted maize (Zea mays L.) genotypes in Ethiopia." Journal of Current Opinion in Crop Science 2, no. 2 (2021): 184–91. http://dx.doi.org/10.62773/jcocs.v2i2.57.

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The improvements of maize hybrid rely on significant genetic variability among the parental lines used and the degree to which it is transferred to progeny. A total of fifty genotypes are being studied in this present investigation. They were used to assess genetic parameters in two representative highland maize-growing areas. For most traits, the level of genetic variation was greater than the corresponding environmental variance. The highest genotypic and phenotypic variances were found in thousand kernel weight, earand plant height, suggesting the effectiveness of genotype selection based o

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25

KVALSETH, TARALD O. "COMMENT ON THE COEFFICIENT OF ORDINAL VARIATION." Perceptual and Motor Skills 81, no. 2 (1995): 621–22. http://dx.doi.org/10.2466/pms.1995.81.2.621.

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26

Ahmed, S. E. "Improved estimation of the coefficient of variation." Journal of Applied Statistics 21, no. 6 (1994): 565–73. http://dx.doi.org/10.1080/757584217.

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27

Kvålseth, Tarald O. "Comment on the Coefficient of Ordinal Variation." Perceptual and Motor Skills 81, no. 2 (1995): 621–22. http://dx.doi.org/10.1177/003151259508100251.

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An index of dispersion and a related standardized coefficient of variation for ordinal categorical data were recently introduced in this journal. These two measures were based on the use of category scores. In this paper, we show these measures can alternatively be expressed in terms of cumulative proportions (probabilities).

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28

Ohta, Sachio, Kohei Ogawa, Naoto Murao, Shuichi Hasegawa, and Kimio Arao. "VARIATION IN ATMOSPHERIC TURBIDITY COEFFICIENT OVER JAPAN." Proceedings of the Symposium on Global Environment 14 (2006): 71–75. http://dx.doi.org/10.2208/proge.14.71.

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29

Boik, Robert J., and Amin Shirvani. "Principal components on coefficient of variation matrices." Statistical Methodology 6, no. 1 (2009): 21–46. http://dx.doi.org/10.1016/j.stamet.2008.02.006.

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30

De, Prabuddha, Jay B. Ghosh, and Charles E. Wells. "Scheduling to minimize the coefficient of variation." International Journal of Production Economics 44, no. 3 (1996): 249–53. http://dx.doi.org/10.1016/0925-5273(96)00056-4.

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31

Lee, Yun-Hee, and Hong-Gie Kim. "Influence Function on the Coefficient of Variation." Communications for Statistical Applications and Methods 15, no. 4 (2008): 509–16. http://dx.doi.org/10.5351/ckss.2008.15.4.509.

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32

Kvålseth, Tarald O. "Coefficient of variation: the second-order alternative." Journal of Applied Statistics 44, no. 3 (2016): 402–15. http://dx.doi.org/10.1080/02664763.2016.1174195.

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33

Weber, V. L. "Coefficient of variation of underwater irradiance fluctuations." Radiophysics and Quantum Electronics 53, no. 1 (2010): 13–27. http://dx.doi.org/10.1007/s11141-010-9200-5.

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34

Tian, Lili. "Inferences on the common coefficient of variation." Statistics in Medicine 24, no. 14 (2005): 2213–20. http://dx.doi.org/10.1002/sim.2088.

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35

Guo, Baocai, and Bing Xing Wang. "Control charts for the coefficient of variation." Statistical Papers 59, no. 3 (2016): 933–55. http://dx.doi.org/10.1007/s00362-016-0797-0.

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36

Hössjer, Ola, Bengt Eriksson, Kajsa Järnmalm, and Esbjörn Ohlsson. "Assessing Individual Unexplained Variation in Non-Life Insurance." ASTIN Bulletin 39, no. 1 (2009): 249–73. http://dx.doi.org/10.2143/ast.39.1.2038064.

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AbstractWe consider variation of observed claim frequencies in non-life insurance, modeled by Poisson regression with overdispersion. In order to quantify how much variation between insurance policies that is captured by the rating factors, one may use the coefficient of determination, R2, the estimated proportion of total variation explained by the model. We introduce a novel coefficient of individual determination (CID), which excludes noise variance and is defined as the estimated fraction of total individual variation explained by the model. We argue that CID is a more relevant measure of

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37

Zhang, D. H., Z. Xiao, Y. Q. Hao, A. J. Ridley, and M. Moldwin. "Modeling ionospheric <I>fo</I>F2 by using empirical orthogonal function analysis." Annales Geophysicae 29, no. 8 (2011): 1501–15. http://dx.doi.org/10.5194/angeo-29-1501-2011.

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Abstract. A similar-parameters interpolation method and an empirical orthogonal function analysis are used to construct empirical models for the ionospheric foF2 by using the observational data from three ground-based ionosonde stations in Japan which are Wakkanai (Geographic 45.4° N, 141.7° E), Kokubunji (Geographic 35.7° N, 140.1° E) and Yamagawa (Geographic 31.2° N, 130.6° E) during the years of 1971–1987. The impact of different drivers towards ionospheric foF2 can be well indicated by choosing appropriate proxies. It is shown that the missing data of original foF2 can be optimal refilled

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38

Zhang, Shujun, Luo Zhong, and Zhijun Xu. "Reliability of Foundation Pile Based on Settlement and a Parameter Sensitivity Analysis." Mathematical Problems in Engineering 2016 (2016): 1–7. http://dx.doi.org/10.1155/2016/1659549.

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Based on the uncertainty analysis to calculation model of settlement, the formula of reliability index of foundation pile is derived. Based on this formula, the influence of coefficient of variation of the calculated settlement at pile head, coefficient of variation of the permissible limit of the settlement, coefficient of variation of the measured settlement, safety coefficient, and the mean value of calculation model coefficient on reliability is analyzed. The results indicate that(1)high reliability index can be obtained by increasing safety coefficient;(2)reliability index will be reduced

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39

Anand, Kumar Jai, S. K. Singh, Sachin Prakash Nagre, Sunny Thakur, Teena Patel, and P. K. Moitra. "Exploring Genetic Variability, Trait Associations and Path Coefficient Analysis in Pea (Pisum sativum L.) to Advance Breeding Strategies." International Journal of Bio-resource and Stress Management 15, Sep, 9 (2024): 01–10. http://dx.doi.org/10.23910/1.2024.5522.

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The experiment was conducted at seed breeding farm, Department of Plant Breeding and Genetics, College of Agriculture, JNKVV, Jabalpur, Madhya Pradesh, India during the rabi season (November, 2019–April, 2020) to estimate the parameters of genetic variability, assess the correlation among traits, and estimate direct and indirect effects. The ANOVA revealed that the mean sum of squares due to genotypes was highly significant for all the traits. The phenotypic coefficient of variation was higher than the genotypic coefficient of variation for all the characters. High values of phenotypic coeffic

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Edwards, Danielle, and Manuel Cervera. "Seasonal Variation in Land and Sea Surface Backscatter Coefficients at High Frequencies." Remote Sensing 14, no. 21 (2022): 5514. http://dx.doi.org/10.3390/rs14215514.

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Over the horizon radars (OTHR) rely on the propagation of high frequency (HF) radio waves via the ionosphere to successfully achieve their designated missions. Backscatter sounders (BSS) are environmental over-the-horizon radars which may be used to assess the ionospheric propagation conditions. However, high power observed by a BSS may be due to either good ionospheric propagation, a high surface backscatter coefficient, or a combination of both. Hence, an understanding of the surface backscatter coefficients and their temporal variation is essential to fully understand the ionospheric propag

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A. N., Kunapara, Subbaiah R., and Patel G. R. "Approximation of the Pressure-discharge Curve in Inline Drip Irrigation System." Journal of Scientific Research and Reports 30, no. 8 (2024): 35–45. http://dx.doi.org/10.9734/jsrr/2024/v30i82222.

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The efficiency of drip irrigation systems depends directly on the uniformity of water discharge from emission devices. Ideally, all emitters should discharge equal amounts of water, but variations occur due to hydraulic and manufacturing factors. This study established the pressure-discharge relationship curve and determined emitter flow variation caused by the hydraulic and the manufacturer’s coefficients of variation for 2 and 4 lph inline emitters. The power exponent and constant of the pressure-discharge curve were determined by measuring the emitter flow rates at operating pressures rangi

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42

Taibaoui, Ahmed, and Tahar Benmessaoud. "A comparative analysis of rotating airfoils focusing on aerodynamic performance and airflow patterns through 2D unsteady simulations." STUDIES IN ENGINEERING AND EXACT SCIENCES 5, no. 1 (2024): 2876–87. http://dx.doi.org/10.54021/seesv5n1-143.

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The blade section of a wind turbine plays a pivotal role in harnessing the power of the wind to generate clean and renewable energy. Each turbine blade is carefully designed with specific aerodynamic principles in mind, primarily focusing on lift and drag forces. Understanding the intricacies of aerodynamics in this context is crucial for optimizing energy capture and ensuring the overall efficiency of wind power systems. In this context the present paper investigates the aerodynamics of three airfoils named NACA-4412, NACA-23012, and NACA-63415 using numerical simulations performed with Ansys

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43

Xiong, Bo, Yuxiao Li, Changhao Yu, et al. "Constructing a Regional Ionospheric TEC Model in China with Empirical Orthogonal Function and Dense GNSS Observation." Remote Sensing 15, no. 21 (2023): 5207. http://dx.doi.org/10.3390/rs15215207.

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Using Global Navigation Satellite Systems (GNSS) observation data for developing a high-precision ionospheric Total Electron Content (TEC) model is one of the essential subjects in ionospheric physics research and the application of satellite navigation correction. In this study, we integrate the Empirical Orthogonal Function (EOF) method with the TEC data provided by the Center for Orbit Determination in Europe (CODE), and observed by the dense GNSS receivers operated by the Crustal Movement Observation Network of China (CMONOC) to construct a regional ionospheric TEC model over China. The EO

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Ying, Tian, Katsuro Hagiwara, and Buho Hoshino. "Causal relationship between seasonal variation in surface roughness and dust and sandstorm occurrence in arid and semi-arid Mongolia." E3S Web of Conferences 575 (2024): 01014. http://dx.doi.org/10.1051/e3sconf/202457501014.

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In this study, the causal relationship between seasonal variations in surface conditions and DSS generation was investigated through the integrated use of the C-band backscatter coefficient (J 0) of the Sentinel 1 microwave satellite from the optical satellite sensor (Terra/MODIS). Because of the very high reflectance of the background soil in sparsely vegetated bare land, it has been difficult to rely solely on optical satellite data for accurate surface condition assessment in previous studies. Therefore, we used SAR and optical data to represent the spatial variability of backscatter coeffi

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Min, Ziyang, Yongqi Li, Xiaoxia Han, Zhuqing Zhang, Zuhua Yuan, and Xinjun Hu. "Analysis of main botanical characters of 56 Momordica charantia varieties." Trends in Horticulture 5, no. 1 (2021): 1. http://dx.doi.org/10.24294/th.v5i1.1811.

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In order to scientifically evaluate the germplasm resources of Momordica charantia in southern China, the diversity, correlation and cluster analysis were carried out on the main botanical characters of 56 Momordica charantia varieties, such as melon length, melon transverse diameter, single melon weight, internode length, stem diameter, leaf length and leaf width. The results showed that the variation coefficients of 7 agronomic characters of 56 Momordica charantia varieties ranged from 8.81% to 19.44%, the average variation coefficient was 14.21%, the maximum variation coefficient of single

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Peng, Tianbo, Feng Li, and Chiyuan Ma. "Study on Coupling Correlation of Factors Affecting Mechanical Properties of High-Damping Rubber Plate." Polymers 17, no. 5 (2025): 593. https://doi.org/10.3390/polym17050593.

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Factors affecting the mechanical properties of the high-damping rubber plate mainly include temperature, shear strain rate, shear strain amplitude, and compressive stress. However, the existing studies focused on one factor and have not conducted detailed research on the coupling relationships between various factors. The influence on the mechanical properties of the high-damping rubber plate of one factor will change with the change in other factors. To study the coupling correlation, a series of horizontal cyclic loading tests were designed and carried out. Due to the simultaneous hyperelast

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Lingorski, Vladimir. "Variation of some chemical indicators in forage of annual winter pure and mixed crops cultivated in Central Balkan Mountains (Bulgaria)." Journal of Agrobiology 29, no. 1 (2012): 15–21. http://dx.doi.org/10.2478/v10146-012-0002-6.

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Abstract The aim of this experiment was to determine the variations in some important chemical indicators of annual winter cereal and legume pure and mixed crops for green forage production under the conditions of the fore-mountain regions of the Central Northern Bulgaria (Troyan region). In pure crops the crude protein content had fewer values compared to mixed crops. The cereals accumulated less crude fat in comparison with legumes. In mixed crops the crude fat was from 1.99 to 2.82%, with a relatively lower coefficient of variation in comparison with pure crops. More crude fibre was indicat

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Mincache, Anuar José, Odair Gonçalves de Oliveira, Lilian Felipe da Silva Tupan, Daniel Matos Silva, Ivair Aparecido dos Santos, and Luiz Fernando Cotica. "Magnetoelectric, magnetodielectric and magneto-impedance couplings in Bi1−xNdxFe0.99Co0.01O3 compounds." Research, Society and Development 10, no. 14 (2021): e470101422189. http://dx.doi.org/10.33448/rsd-v10i14.22189.

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In this work Bi1−xNdxFe0.99Co0.01O3 ceramics compositions were synthesized for x = 0.05, 0.20 and, y = 0.01. Structural refinement results show that most of the samples crystallized in a rhombohedral symmetry with R3c. Measurements magnetoelectric coefficient, show that the magnetoelectric coefficients are of second order. The electrical impedance characterization of in function external magnetic fields, has a relative variation of the real dielectric response, the loss tangent and the electrical impedance. The systems, as the DC magnetic field strength increased a gain in both the values of t

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Araújo, Jaqueline Alves, Tiago Peçanha, Fabiula Isoton Novelli, et al. "Reproducibility of Heart Rate Variability Indices at Post-maximal Exercise." International Journal of Sports Medicine 41, no. 08 (2020): 512–19. http://dx.doi.org/10.1055/a-1114-6297.

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AbstractTo analyze whether heart rate variability is reproducible after maximal exercise, 11 men (22.1±3.2 years) performed four incremental exercise tests followed by passive or active recovery. There was high reliability (intraclass coefficient correlation: 0.72–0.96) and fair-to-excellent agreement (coefficient of variation: 7.81–22.09%) in passive recovery, as well as moderate-to-high reliability (intraclass coefficient correlation: 0.50–0.87) and good agreement (coefficient of variation: 11.08–20.89%) in active recovery for LnRMSSD index. There was moderate-to-high reliability (intraclass

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Boer, D., N. Ladati, Jumarno, Irwan, M. A. Arsyad, and S. H. Larekeng. "Morphological diversity and relationship among cashew (Anacardium occidentale L) individuals in three districts of Southeast Sulawesi, Indonesia." IOP Conference Series: Earth and Environmental Science 886, no. 1 (2021): 012056. http://dx.doi.org/10.1088/1755-1315/886/1/012056.

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Abstract Cashew (Anacardium occidentale L), a species belonging to the family Anacardiaceae, has been cultivated throughout most of Indonesia’s areas and has become a priority commodity in Southeast Sulawesi for years. However, the information about its variation on morphology and relationship among individuals are still limited. This study aimed to determine the morphological variations and relationships among cashew individuals in three districts (Konawe, South Konawe, and East Kolaka) of Southeast Sulawesi. As many as ninety individuals were analyzed on 15 morphological variables for the va

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