Results 51 to 60 of about 104,920 (275)

Forms and genesis of species abundance distributions [PDF]

Computational Ecology and Software, 2015
Species abundance distribution (SAD) is one of the most important metrics in community ecology. SAD curves take a hollow or hyperbolic shape in a histogram plot with many rare species and only a few common species. In general, the shape of SAD is largely
Evans O. Ochiaga, Cang Hui
doaj  

On the Existence and Uniqueness of the Maximum Likelihood Estimators of Normal and Lognormal Population Parameters with Grouped Data

Journal of Probability and Statistics, 2009
Lognormal distribution has abundant applications in various fields. In literature, most inferences on the two parameters of the lognormal distribution are based on Type-I censored sample data.
Jin Xia, Jie Mi, YanYan Zhou
doaj   +1 more source

The Truncated Lognormal Distribution as a Luminosity Function for SWIFT-BAT Gamma-Ray Bursts

Galaxies, 2016
The determination of the luminosity function (LF) in Gamma ray bursts (GRBs) depends on the adopted cosmology, each one characterized by its corresponding luminosity distance.
Lorenzo Zaninetti
doaj   +1 more source

Climate Action Impacts on Steelmaking Emissions of Persistent Organic Pollutants Highlight a Gap Between the Paris Agreement and the Stockholm Convention

Advanced Science, EarlyView.
Emissions of unintentionally produced persistent organic pollutants (UPOPs) and global warming are two major environmental challenges. But their governance has largely evolved in parallel, leaving the toxicity implications of climate‐driven industrial transitions poorly understood.
Yuxiang Sun, Qiuting Yang, Jianghui Yun, Yujue Yang, Junhao Tang, Qian Liu, Minghui Zheng, Guorui Liu   +7 more
wiley   +1 more source

Research on fatigue life of steel wire ropes under impact loads based on double Pareto lognormal distribution

Advances in Mechanical Engineering, 2017
Fatigue damage is the most important failure mode of wire ropes, and models of cumulative fatigue damage of wire ropes under multiple impact loads have been proposed based on the principle of microdamage linear accumulation.
Ren Zhiqian, Chen Xun
doaj   +1 more source

Beyond Zipf's Law: The Lavalette Rank Function and its Properties

, 2016
Although Zipf's law is widespread in natural and social data, one often encounters situations where one or both ends of the ranked data deviate from the power-law function.
Cocho, Germinal, Fontanelli, Oscar, Li, Wentian, Miramontes, Pedro, Yang, Yaning   +4 more
core   +3 more sources

Gel‐Amin for Improving Extracellular Recordings of Cardiomyocytes in a 3D Microphysiological System

Advanced Electronic Materials, EarlyView.
This work combines a conductive collagen‐based hydrogel with a laser‐cut and assembly technique to fabricate microphysiological systems that improve extracellular recordings of cardiomyocytes in 3D on microelectrode arrays. The inclusion of choline acrylate into GelMA imparts a higher electrical conductivity and improves the signal‐to‐noise ratio of on‐
Dominic Pizzarella, Katelyn Neuman, Nolan Burson, Abigail N. Koppes, Ryan A. Koppes   +4 more
wiley   +1 more source

Performance analysis of dual-media cooperative communication based on wireless and power line under hybrid fading

International Journal of Distributed Sensor Networks, 2019
Wireless communication and power line communication are extensively applied in various fields, such as household Internet of things. For cooperative communication of amplify–forward relay using wireless access and power line transmission, the hybrid ...
Zhixiong Chen, Yifang Jing, Dongsheng Han, Lijiao Wang   +3 more
doaj   +1 more source

Enhanced Core Formation Rate in a Turbulent Cloud by Self-gravity

, 2010
We performed a numerical experiment designed for core formation in a self-gravitating, magnetically supercritical, supersonically turbulent, isothermal cloud.
Cho, Wankee, Kim, Jongsoo
core   +1 more source

What determines the density structure of molecular clouds? A case study of Orion B with Herschel [PDF]

, 2013
A key parameter to the description of all star formation processes is the density structure of the gas. In this Letter, we make use of probability distribution functions (PDFs) of Herschel column density maps of Orion B, Aquila, and Polaris, obtained ...
André, Ph., Arzoumanian, D., Benedettini, M., Bontemps, S., Bressert, E., Di Francesco, J., Didelon, P., Federrath, C., Griffin, M., Hennemann, M., Hill, T., Könyves, V., Motte, F., Palmeirim, P., Peretto, N., Pezzuto, S., Roy, A., Rygl, K. L. J., Schneider, N., Spinoglio, L., Ward-Thompson, D., White, G.   +21 more
core   +5 more sources