Results 81 to 90 of about 22,337 (217)

On the Approximation of the Cut and Step Functions by Logistic and Gompertz Functions [PDF]

BIOMATH, 2015
We study the uniform approximation of the sigmoid cut function by smooth sigmoid functions such as the logistic and the Gompertz functions. The limiting case of the interval-valued В  step function is В  discussed В using В  Hausdorff metric. В Various expressions for the error estimates of the corresponding uniform and Hausdorff approximations are ...
Anton Iliev Iliev, Nikolay Kyurkchiev, Svetoslav Markov   +2 more
openaire   +2 more sources

Programmed unmanned aerial vehicles show great potential for monitoring marine megafauna in specific areas of interest

Remote Sensing in Ecology and Conservation, EarlyView.
Targeted conservation measures are contingent on robust knowledge of spatio‐temporal animal distribution in areas of interest. We explore unmanned aerial vehicle (UAV) transect monitoring as a novel method for standardized digital aerial surveys of marine megafauna by investigating the fine‐resolution spatio‐temporal distribution of harbour porpoises ...
Dinah Hartmann, Valdemar Palmqvist, Johanna Stedt   +2 more
wiley   +1 more source

Classes of Ordinary Differential Equations Obtained for the Probability Functions of Gompertz and Gamma Gompertz Distributions [PDF]

, 2017
In this paper, the differential calculus was used to obtain some classes of ordinary differential equations (ODE) for the probability density function, quantile function, survival function, inverse survival function, hazard function and reversed ...
Adamu, M. O., Okagbue, H. I., Opanuga, A. A., Owoloko, E. A.   +3 more
core  

Platform competition and strategic trade‐offs for complementors: Heterogeneous reactions to the entry of a new platform

Strategic Management Journal, EarlyView.
Abstract Research Summary We study how the entry of a rival platform affects the strategies of the incumbent's complementors. The latter face a trade‐off: While the entry threatens their benefits from indirect network effects, it also allows them to escape intense within‐platform competition.
Johannes Loh, Ambre Elsas‐Nicolle
wiley   +1 more source

A Note on the New Activation Function of Gompertz Type

Biomath Communications, 2017
In this note we construct a family of parametric Gompertz activation function (PGAF) based on hyperbolic tangent function. We prove upper and lower estimates for the Hausdorff approximation of the sign function by means of this family. Some comparisons between the hyperbolic tangent activation function and the new parametric Gompertz activation ...
Anton Iliev Iliev, Nikolay Kyurkchiev, Svetoslav Markov   +2 more
openaire   +1 more source

Body Mass Records of Zoo‐Managed Rhinoceros (Ceratotherium simum, Diceros bicornis, Rhinoceros unicornis) as Compared to Field Data of Free‐Ranging Specimens

Zoo Biology, EarlyView.
Female white rhinos in zoos systematically exceed the body mass range for free‐ranging specimens; this is not the case in black rhinos. ABSTRACT The body mass of zoo animals may differ from those in wild populations due to the different environmental and dietary conditions being offered under human‐managed care.
Elisa Garand, Christiane Krauss, Anna Hauffe, Max Hahn‐Klimroth, Dennis W. H. Müller, Paul W. Dierkes, Marcus Clauss, João Pedro Meireles   +7 more
wiley   +1 more source

Inactivation of Escherichia coli ATCC 25922 and Saccharomyces cerevisiae IMR-R-L 962 in grapefruit [Citrus paradisi (Macf.)] juice by UV-C light: changes in bioactive compounds and quality characteristics [PDF]

, 2018
The viability of UV-C treatment (0.0-2.36 J/cm²) at 254 nm as a non-thermal preservation process for grapefruit juice on microbial inactivation, the organic acids and individual flavonoids, as well as the quality characteristics (pH, ºBrix, titratable ...
la Cava, Enzo Luciano Marcelo, Sgroppo, Sonia Cecilia   +1 more
core  

Simultaneous detection of gradual and abrupt structural changes in Bayesian longitudinal modelling using entropy and model fit measures

British Journal of Mathematical and Statistical Psychology, EarlyView.
Abstract Although individuals may exhibit both gradual and abrupt changes in their dynamic properties as shaped by both slowly accumulating influences and acute events, existing statistical frameworks offer limited capacity for the simultaneous detection and representation of these distinct change patterns.
Yanling Li, Xiaoyue Xiong, Zita Oravecz, Sy‐Miin Chow   +3 more
wiley   +1 more source