Results 1 to 10 of about 1,320,114 (290)

Hyper-Null Models and Their Applications [PDF]

Entropy, 2023
Null models are crucial tools for investigating network topological structures. However, research on null models for higher-order networks is still relatively scarce.
Yujie Zeng, Bo Liu, Fang Zhou, Linyuan Lü   +3 more
doaj   +4 more sources

Better null models for assessing predictive accuracy of disease models. [PDF]

PLoS ONE, 2023
Null models provide a critical baseline for the evaluation of predictive disease models. Many studies consider only the grand mean null model (i.e. R2) when evaluating the predictive ability of a model, which is insufficient to convey the predictive ...
Alexander C Keyel, A Marm Kilpatrick
doaj   +5 more sources

Null Models for Formal Contexts [PDF]

Information, 2020
Null model generation for formal contexts is an important task in the realm of formal concept analysis. These random models are in particular useful for, but not limited to, comparing the performance of algorithms.
Maximilian Felde, Tom Hanika, Gerd Stumme   +2 more
doaj   +2 more sources

Uncovering the Dependence of Cascading Failures on Network Topology by Constructing Null Models [PDF]

Entropy, 2019
Cascading failures are the significant cause of network breakdowns in a variety of complex infrastructure systems. Given such a system, uncovering the dependence of cascading failures on its underlying topology is essential but still not well explored in
Lin Ding, Si-Yuan Liu, Quan Yang, Xiao-Ke Xu   +3 more
doaj   +2 more sources

Using coverage‐based rarefaction to infer non‐random species distributions

Ecosphere, 2021
Understanding how species are non‐randomly distributed in space and how the resulting spatial structure responds to ecological, biogeographic, and anthropogenic drivers is a critical piece of the biodiversity puzzle.
Thore Engel, Shane A. Blowes, Daniel J. McGlinn, Felix May, Nicholas J. Gotelli, Brian J. McGill, Jonathan M. Chase   +6 more
doaj   +1 more source

Community assembly during vegetation succession after metal mining is driven by multiple processes with temporal variation

Ecology and Evolution, 2022
The mechanisms governing community assembly is fundamental to ecological restoration and clarification of the assembly processes associated with severe disturbances (characterized by no biological legacy and serious environmental problems) is essential ...
Ting Li, Huaju Yang, Xinting Yang, Zhaolai Guo, Denggao Fu, Chang’e Liu, Shiyu Li, Ying Pan, Yonggui Zhao, Fang Xu, Yang Gao, Changqun Duan   +11 more
doaj   +1 more source

First Description of Invertebrate Benthic Fauna in the Middle Zone of the Loa River (Chile)

Zoodiversity, 2023
Aquatic insect communities in inland waters of Chile are characterised by the presence of certain species depending on water quality, but there is little information on statistical ecology in the structure of insect communities.
P. De los Rios-Escalante, R. Wilson, J. Norambuena, C. Esse   +3 more
doaj   +1 more source

Community structure of benthic invertebrates in the Allipén River basin, North Patagonia, Araucania region (38º S, Chile)

Brazilian Journal of Biology, 2021
One of the biological indicators most used to determine the health of a fluvial ecosystem are the benthic macroinvertebrates. The presence of recurrent species in a wide gradient of latitudes, dominates the biogeographic pattern of the benthic ...
K. Solis-Lufí, M. J. Suazo, M. E. Avila-Salem, C. Maldonado-Murúa, H. Aponte, J. Farias, P. De Los Rios-Escalante   +6 more
doaj   +1 more source

Random sampling associated with microbial profiling leads to overestimated stochasticity inference in community assembly

Frontiers in Microbiology, 2022
Revealing the mechanisms governing the complex community assembly over space and time is a central issue in ecology. Null models have been developed to quantitatively disentangle the relative importance of deterministic vs.
Kai Ma, Qichao Tu, Qichao Tu
doaj   +1 more source

Exact solutions of closed string theory [PDF]

, 1995
We review explicitly known exact $D=4$ solutions with Minkowski signature in closed bosonic string theory. Classical string solutions with space-time interpretation are represented by conformal sigma models.
A A Tseytlin, Bardakci K, Bars I, Bars I, Behrndt K, Brinkmann H W, Callan C, Callan C, De Alwis S, de Boer J, de Vega H, de Vega H, Duff M, Duff M J, Duval C, Ferrara S, Figueroa-O'Farrill J M, Forgács P, Forgács P, Fradkin E S, Fradkin E S, Friedan D, Friedan D, Galtsov D, Gauntlett J, Gibbons G W, Gürses M, Halpern M B, Halpern M B, Horowitz G, Horowitz G, Horowitz G, Horowitz G T, Howe P, Israel W, Johnson C, Kallosh R, Kehagias A, Khuri R, Kiritsis E, Kiritsis E, Kiritsis E, Kounnas C, Kounnas C, Lovelace C, Mohammedi N, Morozov A Yu, Mukhi S, Nesterenko V V, Park J, Penrose R, Peterman A, Peterman A, Polyakov A, Polyakov A M, Russo J G, Russo J G, Russo J G, Sfetsos K, Sfetsos K, Townsend P K, Tseytlin A A, Tseytlin A A, Witten E, Yoneya T, Zamolodchikov A B   +65 more
core   +2 more sources