Results 61 to 70 of about 431,056 (283)
Constant-Ratio Blended Models of Curves and Surfaces in Euclidean 3-Space
Journal of MathematicsWe consider a simple blending method for parametric curves and surfaces. The described blending method offers a systematic approach to creating smooth transitions between parametric curves and surfaces while maintaining Cn-continuity.
B. Bulca Sokur
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A Bayesian non-parametric mixed-effects model of microbial growth curves.
PLoS Computational Biology, 2020 Substantive changes in gene expression, metabolism, and the proteome are manifested in overall changes in microbial population growth. Quantifying how microbes grow is therefore fundamental to areas such as genetics, bioengineering, and food safety ...
Peter D Tonner +5 more
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Semi-nonparametric IV estimation of shape-invariant Engel curves [PDF]
, 2007 This paper studies a shape-invariant Engel curve system with endogenous total expenditure, in which the shape-invariant specification involves a common shift parameter for each demographic group in a pooled system of nonparametric Engel curves.
Blundell, R., Chen, X., Kristensen, D.
core
Symbolic parametrization of curves
Journal of Symbolic Computation, 1991 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Sendra, J. Rafael, Winkler, Franz
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Parametrizations of elliptic curves by Shimura curves and by classical modular curves [PDF]
Proceedings of the National Academy of Sciences, 1997 Fix an isogeny class 𝒜 of semistable elliptic curves over Q. The elements of 𝒜 have a common conductor N , which is a square-free positive integer. Let D be a divisor of N which is the product of an even number of primes—i.e., the discriminant of an indefinite ...
Ribet, Kenneth A., Takahashi, Shuzo
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Time after time – circadian clocks through the lens of oscillator theory
FEBS Letters, EarlyView.Oscillator theory bridges physics and circadian biology. Damped oscillators require external drivers, while limit cycles emerge from delayed feedback and nonlinearities. Coupling enables tissue‐level coherence, and entrainment aligns internal clocks with environmental cues.
Marta del Olmo +2 more
wiley +1 more source
Certain Algorithms for Modeling Uncertain Data Using Fuzzy Tensor Product Bézier Surfaces
Mathematics, 2018 Real data and measures are usually uncertain and cannot be satisfactorily described by accurate real numbers. The imprecision and vagueness should be modeled and represented in data using the concept of fuzzy numbers.
Musavarah Sarwar, Muhammad Akram
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Sequence determinants of RNA G‐quadruplex unfolding by Arg‐rich regions
FEBS Letters, EarlyView.We show that Arg‐rich peptides selectively unfold RNA G‐quadruplexes, but not RNA stem‐loops or DNA/RNA duplexes. This length‐dependent activity is inhibited by acidic residues and is conserved among SR and SR‐related proteins (SRSF1, SRSF3, SRSF9, U1‐70K, and U2AF1).
Naiduwadura Ivon Upekala De Silva +10 more
wiley +1 more source
Computer Assisted Methods in Engineering and Science, 2023 This paper concerns modelling of surfaces resulting from measurements or from digital simulation of surfaces e.g., tooth flanks, based on the theory of gearing, with intentionally introduced modification usually defined in discrete form.
Andrzej Kawalec
doaj
Perfect bell nozzle parametric and optimization curves [PDF]
Nozzle contour data for untruncated Bell nozzles with expansion area ratios to 6100 and a specific heat ratio of 1.2 are provided. Curves for optimization of nozzles for maximum thrust coefficient within a given length, surface area, or area ratio are ...
Blount, D. H., Tuttle, J. L.
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