Results 101 to 110 of about 652,852 (288)
Advances in Difference Equations, 2019 In this paper, we explore a stochastic non-autonomous one-predator–two-prey system with Beddington–DeAngelis functional response and impulsive perturbations.
Haokun Qi, Xinzhu Meng, Tao Feng
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Carbon Sinks and Reservoirs: The Value of Permanence and Role of Discounting [PDF]
Scientists are enthusiastic about storing carbon in terrestrial sinks and geological reservoirs in order to obviate the need for lifestyle-changing reductions in fossil-fuel use.
Pablo Benítez, G. Cornelis van Kooten
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, 2006 Species replacements along freshwater permanence gradients are well documented, but underlying mechanisms are poorly understood for most taxa. In subalpine wetlands in Colorado, the relative abundance of caddisfly larvae shifts from temporary to ...
Wissinger, Scott A. +3 more
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Polarization‐Dependence of Nonlinear Optical Effects in Silicon: The Case of Ultrafast Processing
Advanced Physics Research, EarlyView.The dependence of the input polarization for the nonlinear optical propagation in silicon is investigated theoretically and experimentally. The perturbative regime is examined using pump‐probe shadowgraphy and nonlinear transmission, whereas the case of permanent laser‐induced modifications is addressed using a combination of Raman micro‐spectroscopy ...
Namig Alasgarzade +6 more
wiley +1 more source
Sheep Horn Development Revealed by Multi‐Tissue and Cross‐Species Transcriptomic Analysis
Animal Research and One Health, EarlyView.Multi‐tissue and cross‐species transcriptomics with allele‐specific expression show sheep horns are a composite organ integrating epidermal and osteogenic programs. Conserved horn gene modules and cis‐regulatory variation fine‐tune expression networks underlying horn development and size (small scurs vs. large spiral horns).
Hao Li +10 more
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Stochastic Analysis of a Hassell-Varley Type Predation Model
Abstract and Applied Analysis, 2013 We investigate a Hassell-Varley type predator-prey model with stochastic perturbations. By perturbing the growth rate of prey population and death rate of predator population with white noise terms, we construct a stochastic differential equation model ...
Feng Rao +3 more
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Developmental Learning: A Case Study in Understanding “Object Permanence” [PDF]
, 2004 The concepts of muddy environment and muddy tasks set the ground for us to understand the essence of intelligence, both artificial and natural, which further motivates the need of Developmental Learning for machines.
Chen, Yi, Weng, Juyang
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Approximating Hessian matrices using Bayesian inference: a new approach for quasi-Newton methods in stochastic optimization [PDF]
Using quasi-Newton methods in stochastic optimization is not a trivial task given the difficulty of extracting curvature information from the noisy gradients. Moreover, pre-conditioning noisy gradient observations tend to amplify the noise.
Espath, Luis +2 more
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British Journal of Clinical Pharmacology, EarlyView.Aim Ceftriaxone is a cephalosporin commonly used for the treatment of acute, severe infections; however, there are conflicting data on its disposition properties in children, making it a suitable case study for the evaluation of the appropriateness of extrapolation approaches based on exposure matching principles for paediatric patients and exploring ...
Daniel Valente Neves +7 more
wiley +1 more source
Persistence and extinction of a non-autonomous logistic equation with random perturbation
Electronic Journal of Differential Equations, 2013 Persistence and extinction of a randomized non-autonomous logistic equation is studied. Sufficient conditions for extinction, non-persistence in the mean, weak persistence and stochastic permanence are established.
Meng Liu, Ke Wang
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