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Fractales
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2081“…An analysis of the frequency of occurrence in the human genome of different sequence lengths flanked by one type of nucleotide was carried out showing that the distribution has no self-similar (fractal) structure. The results nevertheless revealed several characteristic features: (i) the distribution for short-range spacing is quite similar to the purely stochastic sequences; (ii) the distribution for long-range spacing essentially deviates from the random sequence distribution, showing strong long-range correlations; (iii) the differences between (A, T) and (C, G) nucleotides are quite significant; (iv) the spacing distribution displays tiny oscillations.…”
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2082“…Secondly, it extracts the feature based on spatial gray matrix independent matrix, spatial frequency decomposition, and fractal features. Then, the immune algorithm is used to classify and identify the normal liver, liver cirrhosis, and liver cancer ultrasound images. …”
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2083por Chang, Baomeng, Du, Cuifeng, Sun, Mingkang, Lin, Yifan, Wang, Yuan, Chu, Xiaofeng, Zhang, Long, He, Jiaqing“…The results show that there is a high correlation between the fractal dimension and fragmentation index of tailings pores and the mesoscopic seepage coefficient, with correlation coefficients of 0.987 and 0.973, respectively. …”
Publicado 2021
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2084por Harada, Masashi, Takata, Shin-ichi, Iwase, Hiroki, Kajiya, Shuji, Kadoura, Hiroaki, Kanaya, Toshiji“…From fitting with a model for a fractal aggregate of polydisperse core–shell spheres, we determined the adsorbed-ionomer thickness on the carbon particle to be 51 Å and the deposited-ionomer amount for the total ionomer to be 50%. …”
Publicado 2021
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2085por Kremer, Hauke Ingolf, Leung, Kwok Wa, Wong, Wai Cheung, Lo, Kenneth Kam-Wing, Lee, Mike W. K.“…To demonstrate the idea of the dielectric paste approach, a circularly polarized DRA with wide bandwidth, which is based on a fractal geometry, is designed. The antenna is realized by filling a 3D-printed mold with the dielectric paste material, and the prototype was found to have an axial ratio bandwidth of 16.7% with an impedance bandwidth of 21.6% with stable broadside radiation.…”
Publicado 2021
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2086por Koga, Maito, Matsumoto, Hidetoshi, Kunishima, Mitsunori, Tokita, Masatoshi, Masunaga, Hiroyasu, Ohta, Noboru, Takeuchi, Akihisa, Mizukado, Junji, Sugimori, Hidekazu, Shinohara, Kazuhiko, Uemura, Suguru, Yoshida, Toshihiko, Hirai, Shuichiro“…The CL comprised a catalyst, a support, and an ionomer. Fractal dimensional analysis of the combined ultrasmall- and small-angle X-ray scattering profiles indicated that the carbon-black-supported Pt catalyst (Pt/CB) surface was covered with the ionomer in the CL. …”
Publicado 2021
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2087“…We have also described signs seen in various pathological conditions like B-lines seen in cases of increased lung density; the quad sign, sinusoid sign, thoracic spine sign, plankton sign and the jelly fish sign seen in pleural effusion; the stratosphere sign and the lung point sign seen in pneumothorax; the shred/fractal sign and tissue-like sign in consolidation, and the double lung point sign seen in transient tachypnoea of the newborn. …”
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2088“…Specifically, we analyzed the fractal dimension and sample entropy of Electroencephalogram (EEG) and Electromyogram (EMG) signals while subjects walked and stood, and received different perturbations in the form of pulling and rotation (via virtual reality). …”
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2089“…Further, the seven-day average of daily positive Omicron cases of the prescribed countries has been predicted for the months of December 2021, January 2022 and February 2022 using the fractal interpolation method. Results elucidate that the curve of daily positive case follows the same pattern even though the new variant of concern, Omicron added in the existing variants.…”
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2090por Simon, Thomas, Li, Xiaoyan, Martin, Jérôme, Khlopin, Dmitry, Stéphan, Odile, Kociak, Mathieu, Gérard, Davy“…Here, we use aluminum self-similar, fractal-like structures as broadband optical antennas. …”
Publicado 2022
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2091por Avots, Egils, Jermakovs, Klāvs, Bachmann, Maie, Päeske, Laura, Ozcinar, Cagri, Anbarjafari, Gholamreza“…The article contains an accuracy comparison for SVM, LDA, NB, kNN, and D3 binary classifiers, which were trained using linear (relative band power, alpha power variability, spectral asymmetry index) and nonlinear (Higuchi fractal dimension, Lempel–Ziv complexity, detrended fluctuation analysis) EEG features. …”
Publicado 2022
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2092por Iosa, Marco, Benedetti, Maria Grazia, Antonucci, Gabriella, Paolucci, Stefano, Morone, Giovanni“…When this proportion is close to the so-called golden ratio (about 1.618), the gait cycle assumes an autosimilar fractal structure. In stroke patients this harmony is altered, but it is unclear which factor is associated with the ratios between gait phases because these relationships are probably not linear. …”
Publicado 2022
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2093por Su, Lipeng, Zhang, Yu, Du, Qian, Dai, Xianchao, Gao, Jianmin, Dong, Peng, Wang, Hui“…Moreover, more small particles could adhere to the surface of large fly ash particles after scavenging while this phenomenon was not found for black carbon due to the characteristic of fractal agglomerates.…”
Publicado 2020
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2094por Zhang, Xiangdong, Cheng, Jun, Lu, Hongxiang, Chu, Feifei, Xu, Junchen, Wang, Xuebin, Cen, Kefa“…The accelerated cell division decreased the cell diameter from 3.64 μm to 2.71 μm and the fractal dimension from 1.60 to 1.49, and the activity of total superoxide dismutase (T-SOD) increased from 0.48 U mL(−1) to 5.33 U mL(−1). …”
Publicado 2019
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2095“…First, we choose five landscape morphology indexes based on the morphological constituent units of the landscape (elongation, rectangular compactness, concavity, ellipse compactness, and fractal dimension). Then, using the self-organizing map (SOM), we create an identification model for clustering the types of constituent units. …”
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2096“…The radius of gyration is used to estimate the fractal dimension of the chain at different stages of folding. …”
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2097por Rafati, Ali H., Ardalan, Maryam, Vontell, Regina T., Mallard, Carina, Wegener, Gregers“…We demonstrated flexibility in forming the cell and its nucleus to show neuronal growth from inside to outside that uses a fractal cylinder to generate neurons (pyramidal/sphere) in form of mathematically called ‘surface of revolution’. …”
Publicado 2022
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2098Crack Localization in Operating Rotors Based on Multivariate Higher Order Dynamic Mode Decomposition“…In addition, the super-harmonic characteristic components are evaluated and harnessed to derive the damage index based on super-harmonic transmissibility and fractal dimension. Finally, the proposed method is investigated and demonstrated by numerical simulations and experiments. …”
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2099por Bizi, Mohamed“…Shear-related floc restructuring is analysed by monitoring the fractal dimension. These models, as well as those used to determine floc porosity, density and volume fraction, are validated by the experimental results obtained from several flocculation operations conducted on ultrafine kaolin in a 4-litre reactor tank compliant with laws of geometric similarity. …”
Publicado 2022
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2100por Walczak, Andrzej Augustyn“…The proposed model has been obtained as solution of the Fractal Fokker–Planck equation (FFPE). The paper shows a comparison of the results of the theoretical model of anomalous diffusion with experimental results of clinical studies using bioimpedance measurements in cardiology. …”
Publicado 2022
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