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Caracterización morfológica de accesiones silvestres de guayaba Morphologic characterization of wild accesions of guava
Published 2009-04-01“…The Dice- Nei Li coefficient and the UPGMA was used for the cluster analysis. …”
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504
Comparison of diagnostic effectiveness of X-ray computed tomography, magnetic resonance imaging and diffusion-weighted magnetic resonance imaging in the differentiation of residual...
Published 2016-10-01“…Whole body CT and MRI-DWI were performed before and after treatment.The effectiveness of lesions size criterion for CT and MRI, visual and quantitative criteria for MRI-DWI were investigated. …”
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505
Diffusion-weighted MRI-Derived ADC and tumor volume as predictive imaging markers for neoadjuvant chemotherapy response in muscle-invasive bladder cancer
Published 2025-01-01“…Abstract Background This prospective study tested the hypothesis that the apparent diffusion coefficient (ADC) value and tumor volume (TV) measured in diffusion-weighted magnetic resonance imaging (DW-MRI) before, during, and after the treatment are quantitative imaging markers to assess tumor response in muscle-invasive bladder cancer (MIBC) patients undergoing neoadjuvant chemotherapy (NAC). …”
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506
Comparing circular and flexibly-shaped scan statistics for disease clustering detection
Published 2025-01-01“…A comprehensive comparison was made using two quantitative indicators, the LLR value and cluster size, as well as clustering visualizations. …”
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507
Development and application of tail brush elastic test device
Published 2025-04-01“…Single-factor test was carried out for each factor, then based on the Plackett-Burmanf theory and Box-Behnken response surface design theory, the ANOVA method was used to find out the significant degree of each factor’s influence on the quantitative index. The prediction model of elastic coefficient and resilience force was fitted based on RSM theory, and the verification group was added to verify the reliability of the prediction model. …”
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508
Role of magnetic resonance imaging in characterization of superficial soft tissue masses
Published 2025-06-01“…Diffusion-weighted MRI (DWI) is increasingly utilized to differentiate these masses, as malignant tumors typically show more restricted diffusion due to higher cellularity, making quantitative ADC values essential for precise diagnosis. …”
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509
Hydraulic fracture prediction theory based on the minimumstrain energy density criterion
Published 2019-04-01“…Hydraulic fracturing is a promising technique used in oil and gas reservoirs, enhanced geothermal systems, and coal gas production.Although its use is widespread, many aspects of hydraulic fracturing are still not well understood and need to be further investigated to achieve increases in oil and gas production while mitigating the adverse aspects of hydraulic fracturing.Understanding how hydraulic pressure extends preexisting fractures and forms a complex fracture network is essential for the design and treatment of hydraulic fracturing.Critical water pressure and fracture initiation angle are two important parameters involved in the hydraulic fracture propagation process and production from a well.In the present study, a minimum strain energy density criterion, which considers the effects of T-stress and Poisson's ratio, was proposed to analyze fracture initiation during hydraulic fracturing.The fracture initiation angle for different crack types was investigated using the proposed theoretical method, and the results indicate that the fracture initiation angle is not only related to the stress intensity factor but also affected by the T-stress and Poisson's ratio.The critical water pressure and critical initiation angle for two symmetric radial cracks emanating from a pressurized borehole were investigated, and the theoretical results were consistent with the experimental results.Through the proposed theoretical method, the influence of T-stress, radius of the fracture process zone, Biot's coefficient, lateral pressure coefficient and Poisson's ratio on the hydraulic fracturing behavior was analyzed.Parameter analysis indicates that the radius of the fracture process zone, T-stress, and lateral pressure coefficient play an important role in the critical initiation angle and critical water pressure.The critical water pressure increases with the decrement of Poisson's ratio, whereas the critical initiation angle shows the opposite trend.Biot's coefficient has no effect on the critical initiation angle but has a significant influence on the fracture initiation angle under high water pressure.The theoretical model enables a comprehensive understanding of the characteristics of hydraulic fracturing under complex loading conditions.The results also provided a basis for quantitative investigations of the engineering design of hydraulic fracturing treatments.…”
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510
Characterization methods and experimental study of mining-induced rock mass damage and fracture using carbon fiber similar materials
Published 2025-07-01“…The study found that as the carbon fiber content increased, the evolution patterns of the electrical resistance change rate and the damage coefficient of the similar material tended to coincide. …”
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511
The problems of numerical inequalities estimates
Published 2018-09-01“…The purpose of this paper is to compare the shortcomings of the widely used inequality coefficients that appear when working with real (ie, knowingly incomplete) data and searching for alternative quantitative methods for describing inequalities that lack these shortcomings.Research methods:– consideration of an extensive range of as full as possible real data on the population distribution by income, expenditure, property (ie data on the economic structure of society);– revealing the specific shortcomings of these data on the economic structure of society, finding out which information is missing or presented disproportionately;– comparison of the values of the most widely used indices of inequality calculated on real data on the economic structure, with a view to establishing the suitability of these indicators for problems of inequality estimation;– development of an index of inequality that adequately describes the real economic structure of society.Research data:– official data of Rosstat and the Federal Tax Service on incomes of Russian citizens;– specialized sites of announcements about the prices for real estate and cars;– Credit Suisse Research Institute data on the distribution of Russian citizens by property level;– Forbes data on income and wealth of the richest people in Russia.It is shown that the income data are essentially incomplete and fragmentary – the width of the income range (i.e., the income of therichest member of society) is known, but the filling of rich cohorts is not known, since the incomes of the richest members of society are hidden.We proposed the next (criteria as) requirements for an inequality index:– possibility of calculating the index of inequality for arbitrary quantization;– invariance of the value of the inequality index for different quantization of the same data;– sensitivity of the index to the width of the income range.It is noted that only the exponential function describes societies with high social inequality enough well (the intensity of the exponential distribution is more than 10).For the presented population distributions, the next indices of inequality are calculated:– decile coefficient of funds;– Gini coefficient;– Pareto index;– indicators of total entropy (zero, first or Tayle index, and second orders);– the ratio of maximum income (property value) to the modal;– intensity of exponential distribution.It is shown, that:– the value of the Pareto index does not have a unique relationship with the inequality;– the coefficients of the funds (decile, quintile, etc.) are not computable for arbitrary quantization, and therefore are unsuitable for comparing data from various sources and have different quantization;– The Gini index requires complete data on the rich;– from all considered criteria of inequality the first three indicators of the total entropy, as well as the ratio of maximum income (property) to the modal strongly depend on data quantization.Therefore they are unsuitable for comparison data from various sources with different quantization. …”
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512
Propagation of smallness for solutions of elliptic equations in the plane
Published 2025-01-01“…In particular, the gradients of solutions to divergence form equations with Hölder continuous coefficients, as well as those of nondivergence form equations with measurable coefficients, can be quantitatively estimated from the small sets.…”
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513
The Interplay of Inter- and Intramolecular Hydrogen Bonding in Ether Alcohols Related to n-Octanol
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514
Application of Adaptive Search Window-Based Nonlocal Total Variation Filter in Low-Dose Computed Tomography Images: A Phantom Study
Published 2024-11-01“…The adaptive NL-TV filter was designed by applying the optimal window value calculated by confirming the difference between Gaussian filtering and the basic NL-TV approach. For quantitative image quality evaluation parameters, contrast-to-noise ratio (CNR), coefficient of variation (COV), and sigma value were used to confirm the noise reduction effectiveness and spatial resolution value. …”
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515
Stationary thermal-gas-dynamics of flows in the cylinder and exhaust system of a piston engine
Published 2023-04-01“…Qualitative and quantitative differences in gas dynamics and heat transfer processes are shown.CONCLUSION. …”
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516
Dataset on droplet spreading and rebound behavior of water and viscous water-glycerol mixtures on superhydrophobic surfaces with laser-made channelsMendeley Data
Published 2025-08-01“…A supplementary dataset includes the same quantitative information for droplet impacts on a smooth, hydrophobic surface, resembling the surface between the laser-made channels on other superhydrophobic surfaces (125 additional datapoints). …”
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THERMAL EFFECTIVENESS OF THE GAS FLOW VORTICAL HEAT-RELEASE INTENSIFICATION AT AXIAL AND TRANSVERSAL FLOWING-AROUND THE ROUND-TUBULAR SURFACES. Part 1
Published 2015-06-01“…The authors present a numerical comparison of the thermal effectiveness of the monophasic-stream axial flowing inside a smooth pipe with transversal flow-around of staggered and in-line tube banks in interval Re = (3−500) × 103 with equal power input N0 = idem for priming gas (air) flow. Coefficient estimates the thermal effectiveness quantitatively and represents the relation of heat-emission coefficients of surface i being examined to basesurface k assumed standard. …”
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518
Investigation of acoustic properties of snow-covered sea ice
Published 2018-09-01“…The purpose of the research was to determine the quantitative characteristics of the reflection and absorption coefficients of sound from the bottom of the drifting ice cover, as well as the Doppler broadening of the frequency spectrum of acoustic signals depending on the thickness of the ice, the structure of the reflecting surface, the thickness of the snow cover, and the ice drift speed. …”
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519
Methods and approaches of determining the boundaries of agglomerations (basic case Kharkiv region)
Published 2020-06-01“…It is established that the Kharkiv agglomeration is monocentric and well formed. The development coefficient of the Kharkiv urban agglomeration is 30.7, the agglomeration coefficient is 0.13, the agglomeration index is 0.25, which confirms the high level of development of this agglomeration and the significant polarizing effect of the city of Kharkiv. …”
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520
Exploring Energy-Efficient Design Strategies in High-Rise Building Façades for Sustainable Development and Energy Consumption
Published 2025-03-01“…This paper combines quantitative analyses through improved thermal simulations and qualitative information from surveys of stakeholders, including architects, engineers, and urban planners. …”
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