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Fractales
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961“…We outline in this article a hybrid intelligent fuzzy fractal approach for classification of countries based on a mixture of fractal theoretical concepts and fuzzy logic mathematical constructs. …”
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962“…The article proposes methodological approaches to the verification of indicators of the state of the country’s economic security using the method of fractal analysis. Fractal analysis technologies make it possible to determine the nature and dynamics of changes in the indicator, to verify its values (indicative or critical), and also to reveal the rate at which these states are reached on the time horizon of statistical observations. …”
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963por Luppi, Andrea I., Craig, Michael M., Coppola, Peter, Peattie, Alexander R.D., Finoia, Paola, Williams, Guy B., Allanson, Judith, Pickard, John D., Menon, David K., Stamatakis, Emmanuel A.“…Recent evidence indicates that fractal dimension of functional brain networks, a measure of self-similarity, is diminished in patients diagnosed with disorders of consciousness arising from severe brain injury. …”
Publicado 2021
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964“…To investigate the influence of the fissure morphology on the dynamic mechanical properties of the rock and the crack propagation, a drop hammer impact test device was used to conduct impact failure tests on sandstones with different fissure numbers and fissure dips, simultaneously recorded the crack growth after each impact. The box fractal dimension is used to quantitatively analyze the dynamic change in the sandstone cracks and a fractal model of crack growth over time is established based on fractal theory. …”
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965“…Since an index of HRV based on fractal correlation properties, alpha 1 of detrended fluctuation analysis (DFA a1) displays overall organismic demands, alteration during exertion may provide insight into physiologic changes accompanying fatigue. …”
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966“…Multi-fractal analysis is also used in the pre-processing step to segment the region of interest (ROI). …”
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967“…The proposed sensor is constructed as a miniaturized microwave resonator based on Moore fractal geometry of the 4th iteration. The T-resonator is combined with the proposed structure to increase the sensor quality factor. …”
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968por Qu, Huawei, Han, Zhenyu, Chen, Zhigang, Tang, Lan, Gao, Chongjian, Liu, Kaizheng, Pan, Haobo, Fu, Hongya, Ruan, Changshun“…Inspired by a typical fractal structure of Koch snowflake, for the first time, a fractal-like porous scaffold with a controllable hierarchical gradient in the radial direction is presented via fractal design and then implemented by EB-3D printing. …”
Publicado 2021
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969“…We have found that the fractal admittance operator obtained from the minimum repeating unit of the fractal circuit can simply and directly determine the blood-flow regulation mechanism. …”
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970por Di Dio, Carmela, Chiloiro, Giuditta, Cusumano, Davide, Catucci, Francesco, Boldrini, Luca, Romano, Angela, Meldolesi, Elisa, Marazzi, Fabio, Corvari, Barbara, Barbaro, Brunella, Manfredi, Riccardo, Valentini, Vincenzo, Gambacorta, Maria Antonietta“…RESULTS: A total of 176 image features belonging to four families (morphological, statistical, textural, and fractal) were calculated for each patient. At the univariate analysis, the only feature showing significance in predicting 5yDFS was the maximum fractal dimension of the subpopulation identified considering 30% and 50% as threshold levels (maxFD(30–50)). …”
Publicado 2021
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971por Yagmur, Burcu, Tercanli-Alkis, Humeyra, Tayfun-Kupesiz, Funda, Karayilmaz, Huseyin, Kupesiz, Osman Alphan“…Key words:Beta-thalassemia major, fractals, panoramic radiography.…”
Publicado 2022
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972por Adnan, Ali, Amir, Rahman, Mati ur, Arfan, Muhammad, Shah, Zahir, Kumam, Poom, Deebani, Wejdan“…The susceptible, infected, quarantine and recovered classes with fractal fractional Atangana-Baleanu-Caputo (ABC) derivative is studied. …”
Publicado 2022
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973“…Quantitative OCT-A parameters, including vascular perfusion density (VPD), fractal dimension (FD), and lacunarity (LAC), were measured in CNV eyes. …”
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974por Racz, Frigyes Samuel, Czoch, Akos, Kaposzta, Zalan, Stylianou, Orestis, Mukli, Peter, Eke, Andras“…Investigating scale-free (i.e., fractal) functional connectivity in the brain has recently attracted increasing attention. …”
Publicado 2022
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975“…When damage occurs, fractal spectral width Δα decreases and then stabilizes and concentrates. …”
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976“…With a focus on medical images, this work proposes a novel ‘fractalized’ chaos-cellular automata encryption scheme, implemented on Cyclone IV EP2C35F672C6 FPGA, resulting in a hardware-based concurrent security solution. …”
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977por Michallek, Florian, Huisman, Henkjan, Hamm, Bernd, Elezkurtaj, Sefer, Maxeiner, Andreas, Dewey, Marc“…Characterizing tumor perfusion by exploiting the fractal nature of vascular anatomy might elucidate the aggressive potential of a tumor. …”
Publicado 2021
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978por Michallek, Florian, Sartoris, Riccardo, Beaufrère, Aurélie, Dioguardi Burgio, Marco, Cauchy, François, Cannella, Roberto, Paradis, Valérie, Ronot, Maxime, Dewey, Marc, Vilgrain, Valérie“…BACKGROUND: To investigate whether fractal analysis of perfusion differentiates hepatocellular adenoma (HCA) subtypes and hepatocellular carcinoma (HCC) in non-cirrhotic liver by quantifying perfusion chaos using four-dimensional dynamic contrast-enhanced magnetic resonance imaging (4D-DCE-MRI). …”
Publicado 2022
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979“…The mechanism of the fractal assembly of this peptide has been unraveled as follows. …”
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980por Lei, Chuxiang, Gao, Qi, Wei, Runjie, Li, Qijie, Liu, Xingli, Wu, Lingmin, Yao, Yan, Fan, Hongguang, Zheng, Zhe“…All patients in the training cohort underwent both transesophageal echocardiography (TEE) and enhanced computed tomography (CT). Fractal dimension (FD) analysis was performed to evaluate the morphological complexity of LAAs quantitatively. …”
Publicado 2022
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