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Article

AN EXTENSION OF THE CLASSICAL DISTANCE CORRELATION COEFFICIENT FOR MULTIVARIATE FUNCTIONAL DATA WITH APPLICATIONS

The relationship between two sets of real variables defined for the same individuals can be evaluated by a few different correlation coefficients. For the functional data we have one important tool: canonical correlations. It is not immediately straightforward to extend other similar measures to the context of functional data analysis. In this work we show how to use the distance correlation coefficient for a multivariate functional case. The approaches discussed are illustrated with an

Tomasz Górecki, Mirosław Krzy´sko, Waldemar Ratajczak, Waldemar Woły´nski

Statistics in Transition New Series, Volume 17 , ISSUE 3, 449–466

Article

THE CHOICE OF NORMALIZATION METHOD AND RANKINGS OF THE SET OF OBJECTS BASED ON COMPOSITE INDICATOR VALUES

identified. The considerations included in Table 3 reduce this number to 10 normalization methods. Next, the article discusses the procedure which allows separating groups of normalization methods leading to similar rankings of the set of objects separately for each composite indicator formula. The proposal, based on Kendall’s tau correlation coefficient (Kendall, 1955) and cluster analysis, can reduce the problem of choosing the normalization method. Based on the suggested research procedure the

Marek Walesiak

Statistics in Transition New Series, Volume 19 , ISSUE 4, 693–710

Article

THE CHOICE OF NORMALIZATION METHOD AND RANKINGS OF THE SET OF OBJECTS BASED ON COMPOSITE INDICATOR VALUES

identified. The considerations included in Table 3 reduce this number to 10 normalization methods. Next, the article discusses the procedure which allows separating groups of normalization methods leading to similar rankings of the set of objects separately for each composite indicator formula. The proposal, based on Kendall’s tau correlation coefficient (Kendall, 1955) and cluster analysis, can reduce the problem of choosing the normalization method. Based on the suggested research procedure the

Marek Walesiak

Statistics in Transition New Series, Volume 19 , ISSUE 4, 693–710

Article

DETERMINATION OF THE INFLUENCE OF INFRASTRUCTURAL AND ECONOMIC FACTORS ON THE VOLUME OF FREIGHT TRANSPORT ON RAILWAY LINES IN POLAND

Wojciech KAMIŃSKI

Transport Problems, Volume 15 , ISSUE 4, Part 2, 167–178

Article

STUDY ON IMAGE COMPRESSION AND FUSION BASED ON THE WAVELET TRANSFORM TECHNOLOGY

characteristics. Registration algorithm is proposed in this paper has better robustness to image noise, and can achieve sub-pixel accuracy; the registration time has also been greatly improved. In terms of image fusion, the images to be fused through wavelet transform of different resolution sub image, using a new image fusion method based on energy and correlation coefficient. The high frequency image decomposed using new energy pixels of the window to window energy contribution rate of fusion rules, the low

Zhang Ning, Zhu Jinfu

International Journal on Smart Sensing and Intelligent Systems, Volume 8 , ISSUE 1, 480–496

Article

Gathering Correlated Data in Wireless Sensor Networks Using a Heuristic Algorithm

Yuexian Wang, Cheng Chew Lim

International Journal of Advanced Network, Monitoring and Controls, Volume 1 , ISSUE 1, –

Sampling Methods

EFFICIENT ESTIMATORS OF POPULATION MEAN USING AUXILIARY INFORMATION UNDER SIMPLE RANDOM SAMPLING

In the present study we have proposed an improved family of estimators for estimation of population mean using the auxiliary information of median, quartile deviation, Gini’s mean difference, Downton’s Method, Probability Weighted Moments and their linear combinations with correlation coefficient and coefficient of variation. The performance of the proposed family of estimators is analysed by mean square error and bias and compared with the existing estimators in the literature. By

Mir Subzar, Showkat Maqbool, Tariq Ahmad Raja, Surya Kant Pal, Prayas Sharma

Statistics in Transition New Series, Volume 19 , ISSUE 2, 219–238

Article

An Improved Universal Evidence Combination Method

The Dempster-Shafer evidence combination method will appear inconsistent conclusions for the conflict evidence. One new universal evidence combination method was proposed. According to the concept of the Pearson correlation coefficient. Evidence distances which represent the conflict degree were calculated, and then the weight coefficient were further converted. The evidences probability were redistributed by using the weight coefficient. Finally, the improved synthesis rule was used to the

Yongchao Wei

International Journal of Advanced Network, Monitoring and Controls, Volume 2 , ISSUE 1, 65–71

Research Article

FEEDBACK EQUALIZER FOR VEHICULAR CHANNEL

) have been investigated in V2V channel. In this paper, through the simulation, the results are presented to show the effect of the channel correlation coefficient and Doppler shift (Fd) (because of the relative velocity of the vehicle) over the performance of the MIMO system. As a counter measure of those problems non-linear receivers have been formulated and analyzed.

Samarendra Nath Sur, Rabindranath Bera, Bansibadan Maji

International Journal on Smart Sensing and Intelligent Systems, Volume 10 , ISSUE 1, 50–68

Article

The Disease Assessment of Cucumber Downy Mildew Based on Image Processing

index of the disease. The average identification accuracy of downy mildew image reaches 98.3%, and average image processing takes 10.9 ms/picture. By compared with human eyes assessment and basic value, the result shows that the human eyes assessment method have strong subjectivity, dramatic changes and bigger error, while the image analysis method get the correlation coefficient for disease index and basic value of 0.9417, has obvious linear correlation.

Jingzhu Li, Peng Wang, Changxing Geng

International Journal of Advanced Network, Monitoring and Controls, Volume 2 , ISSUE 4, 176–180

Original Paper

Repeatability and reproducibility of measurements of the suburethral tape location obtained in pelvic floor ultrasound performed with a transvaginal probe

obtained according to a standardized technique in women referred for urogynecological diagnostics. Data from a total of 68 patients were used to analyse the repeatability and reproducibility of results obtained on the same day. Results: The intraclass correlation coefficient for the repeatability and reproducibility of the sonographic measurements of suburethral tape location obtained with a transvaginal probe ranged from 0.6665 to 0.9911. The analysis of the measurements confirmed their consistency to

Maria Magdalena Dresler, Jacek Kociszewski, Edyta Wlaźlak, Piotr Pędraszewski, Agnieszka Trzeciak, Grzegorz Surkont

Journal of Ultrasonography, Volume 17 , ISSUE 69, 101–105

research-article

Inter-rater reliability of an ultrasound protocol to evaluate the anterolateral ligament of the knee

. Data analyses were performed using IBM SPSS Version 21 (SPSS Inc. Chicago, Il, USA). All data was checked for assumptions. Descriptive statistics were calculated, and the Intraclass Correlation Coefficient (ICC) was used to assess inter-rater reliability (ICC2.1; two-way random effects model, single measurement type defined in absolute agreement) reported with 95% confidence interval (CI) of the estimated ICC. The level of reliability was based on the general guideline according to Koo, 2016(25

Michel Kandel, Erik Cattrysse, Michel De Maeseneer, Leon Lenchik, Marc Paantjens, Marco Leeuw

Journal of Ultrasonography, Volume 19 , ISSUE 78, 181–186

research-article

Fetal ultrasound estimated weight and correlation to Brazilian newborn weight

mean relative error (standard weight – estimated weight), average absolute error ((standard weight – estimated weight)/standard weight) and the Pearson correlation coefficient (r) with dispersion graphics using 2011 Excel statistical function calculations. Results The differences between the newborn weights and calculated estimated weight in the different tables and different biometric weight calculation formulas were studied by the average relative error and absolute error average. The relative

Roberto Noya Galluzzo, Alberto Trapani, Heron Werner, Renato Augusto Moreira de Sá, João Carlos Xikota, Edward Araujo, Maria Marlene de Souza Pires

Journal of Ultrasonography, Volume 20 , ISSUE 81, 106–110

Research Article

Urethral length measurement in women during sonographic urethrocystography – an analysis of repeatability and reproducibility

AimAn assessment of repeatability and reproducibility of urethral length measurements during sonographic urethrocystography in females with a full bladder in the introital approach, using real-time two-dimensional transvaginal ultrasound.Material and methodsThe ultrasound was performed in accordance with a standardized technique in female patients with a full bladder containing 200–300 mL of liquid. A total of 92 patients were included in the analysis.ResultsThe Intraclass Correlation

Edyta Wlaźlak, Jacek Kociszewski, Jacek Suzin, Maria Dresler, Grzegorz Surkont

Journal of Ultrasonography, Volume 16 , ISSUE 64, 25–31

research-article

Ultrasound image of healthy skin in newborns in the first 24 hours of life

study was conducted with the Centre of Postgraduate Medical Education grant no. 506-1-020-01-19. Statistics The statistical evaluation of the results was performed with statistical tests available in Statistica 10 software (StatSoft). The Shapiro-Wilk test was used to determine the distribution of variables. The proposed null hypothesis was that there was no relationship between the studied variables, and the correlation coefficient (R) would be equal to 0. The relationships between variables were

Paulina Przybysz, Teresa Jackowska, Maria Wilińska, Sylwia Malinowska, Joanna Wójtowicz, Robert Krzysztof Mlosek

Journal of Ultrasonography, Volume 20 , ISSUE 83, 242–247

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