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Kinetic simulation of uranium migration in granite fissure media of beishan, gansu, China: A case study based on the Laplace transform and inverse transform methods
Published 2025-02-01“…The following insights were obtained: (1) After 100,000 years, U-238 has a very limited diffusion depth in the matrix domain, with a diffusion range of only a few tens of millimeters, whereas it migrates relatively quickly in the fissure domain, with a maximum migration distance of about 1500 m. (2) Under the same migration time and distance, the relative concentration of nuclide U-238 in the fissure domain increases with larger gap width, hydraulic gradient, and diffusible area ratio, but decreases with higher rock porosity. (3) In the same time range, the rock masses with larger gap widths, hydraulic gradients, and diffusible area ratios have larger migration ranges, while those with higher porosities have smaller migration ranges. (4) While selecting a site for diposal of HLWs, it is recommended to choose rock masses in the granite area of Beishan with no fissures or few fissures; additionally, areas with smaller fissure widths, hydraulic gradients, and diffusible area ratios but higher rock porosity should be prioritized. …”
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2542
Classification of Cigarette Types Using Computer Vision: An Analysis of Smoke Aggregation Features
Published 2025-01-01“…Based on this data set, we applied the traditional vision algorithm to extract the diffusion width, sedimentation concentration and diffusion distance of smoke, and used the KNN model for training, and initially reached an accuracy of 69.8%. …”
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2543
Ionospheric Response to the 24–27 February 2023 Solar Flare and Geomagnetic Storms Over the European Region Using a Machine Learning–Based Tomographic Technique
Published 2025-01-01“…These combined effects offset the alternating positive and negative structures induced by ambipolar diffusion, becoming the main cause of electron density variations during ionospheric storms.…”
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2544
Efficient continuous SF6/N2 separation using low-cost and robust metal-organic frameworks composites
Published 2025-01-01“…Record-high selectivities (> 2×104) and SF6 dynamic capacities (~ 2.7 mmol/g) were achieved, while exceptional SF6 productivities (~ 58.7 L/kg), yields (~ 96.8%), and recyclability (~ 1000 cycles) were demonstrated in fixed-bed adsorption-desorption experiments under mild regeneration conditions. 2D solid-state NMR/in-situ FTIR, DFT-D binding/diffusion simulation analyses revealed the multi-site binding mode and the ultra-fast diffusion of SF6 within the channels. …”
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2545
A spatial model of tumor-host interaction: Application of chemotherapy
Published 2009-05-01“…The drug was treated as a diffusible substance entering the tissue from the blood vessels. …”
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2546
An MRI radiomics model for predicting a prostate-specific antigen response following abiraterone treatment in patients with metastatic castration-resistant prostate cancer
Published 2025-01-01“…By extracting features from biparametric MRI, including T2-weighted imaging(T2WI), diffusion-weighted imaging(DWI), and apparent diffusion coefficient(ADC) maps, radiomics features from the training dataset were selected using least absolute shrinkage and selection operator(LASSO) regression. …”
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2547
Antioxidant and antibacterial activity of red seaweed Kappaphycus alvarezii against pathogenic bacteria
Published 2020-01-01“…Total phenolic content and ferric reducing assays were employed to quantify antioxidant properties. Whereas, the disc diffusion assays were used to study antibacterial activity. …”
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2548
Microenvironment-confined kinetic elucidation and implementation of a DNA nano-phage with a shielded internal computing layer
Published 2025-01-01“…We explain the contradiction between fast molecular diffusion and effective DNA computation using a “diffusion trap” theory and comprehensively overcome the kinetic bottleneck of DNP by determining the rate-limiting step. …”
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2549
Développer la culture du paysage chez les acteurs locaux : la démarche du Parc naturel régional de la Narbonnaise en Méditerranée à l’épreuve de la pression urbaine
Published 2019-07-01“…Trying to overcome what appears to be a sort of consensus about the importance of the landscape dimension due to the European Landscape Convention and to the evolution of the French legislative framework, the paper tries to highlight the processes of emergence and diffusion of a collective “culture of landscape” applied to urban planning. …”
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2550
Strategic Antecedents and Consequents for the Performance of E-Business Companies
Published 2017-01-01“…The research is supported theoretically by the Technological, Organizational and Environmental framework (TOE), derived from the Diffusion of Innovation Theory (DIT), for the Strategic Background (IFINEDO, 2011), by the Business Model theory (OSTERWALDER; PIGNEUR; 2010; SOUZA; BATISTA, 2014) and by the business performance literature (RAMANUJAN; VENKATRAMAN, 1987). …”
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Local government broadband policies for areas with limited Internet access
Published 2012-10-01“…Despite their wide diffusion in developed countries, broadband services are still limited in areas where providing them is not profitable for private telecom carriers. …”
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2554
The Existence of Weak D-Pullback Exponential Attractor for Nonautonomous Dynamical System
Published 2016-01-01“…As an application, we obtain the existence of weak D-pullback exponential attractor for reaction diffusion equation in H01 with exponential growth of the external force.…”
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A model of thermotherapy treatment for bladder cancer
Published 2016-07-01“…The model is based on the conductive Maxwell's equations used to simulate the therapy administration and Convection-Diffusion equation for incompressible fluid to study heat propagation through the bladder tissue. …”
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2557
The Adsorption of Pollutants from Aqueous Effluents Using a Two-Resistance Mass-Transfer Model
Published 1991-03-01“…Both methods are based on external mass transfer and internal diffusion as the controlling mass-transfer resistances. …”
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The investigation of the kinetics of hydrochemical oxidation of metal sulphides with the aim of determination of the optimal conditions for the selective extraction of molybdenum f...
Published 2005-01-01“…The conditions of kinetically and diffusion-controlled processes were detected. The details of mechanism of the studied processes were revealed. …”
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2559
Coopération internationale locale et politique éducative en Guyane
Published 2008-10-01Get full text
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2560
Epizooties et géographie du commerce du bétail dans la Corne d’Afrique
Published 2009-03-01Get full text
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