Results 71 to 80 of about 1,047,288 (209)

A new tool for exploring climate change induced range shifts of conifer species in China.

open access: yesPLoS ONE, 2014
It is inevitable that tree species will undergo considerable range shifts in response to anthropogenic induced climate change, even in the near future. Species Distribution Models (SDMs) are valuable tools in exploring general temporal trends and spatial
Xiaojun Kou   +4 more
doaj   +1 more source

The prevalence of terraced treescapes in analyses of phylogenetic data sets

open access: yesBMC Evolutionary Biology, 2018
Background The pattern of data availability in a phylogenetic data set may lead to the formation of terraces, collections of equally optimal trees. Terraces can arise in tree space if trees are scored with parsimony or with partitioned, edge-unlinked ...
Barbara H. Dobrin   +2 more
doaj   +1 more source

Measuring Evolutionary Isolation for Conservation.

open access: yesPLoS ONE, 2014
Conservation planning needs to account for limited resources when choosing those species on which to focus attention and resources. Currently, funding is biased to small sections of the tree of life, such as raptors and carnivores.
David W Redding   +2 more
doaj   +1 more source

The Minimum Spanning Tree Problem on networks with Neutrosophic numbers [PDF]

open access: yesNeutrosophic Sets and Systems
The minimum spanning tree problem (MSTP) revolves around creating a spanning tree (ST) within a graph/network that incurs the least cost compared to all other potential STs.
Kalyan Adhikary   +2 more
doaj   +1 more source

An evolutionary theory on virus mutation in COVID-19

open access: yesVirus Research
With the rapid evolution of SARS-CoV-2, the emergence of new strains is an intriguing question. This paper presents an evolutionary theory to analyze the mutations of the virus and identify the conditions that lead to the generation of new strains.
Liaofu Luo, Jun Lv
doaj   +1 more source

Application and Exploration of Big Data Mining in Clinical Medicine

open access: yesChinese Medical Journal, 2016
Objective: To review theories and technologies of big data mining and their application in clinical medicine. Data Sources: Literatures published in English or Chinese regarding theories and technologies of big data mining and the concrete applications ...
Yue Zhang   +3 more
doaj   +1 more source

Solution Concepts for Games with General Coalitional Structure (Replaces CentER DP 2011-025) [PDF]

open access: yes
We introduce a theory on marginal values and their core stability for cooperative games with arbitrary coalition structure. The theory is based on the notion of nested sets and the complex of nested sets associated to an arbitrary set system and the M ...
Koshevoy, G.A., Talman, A.J.J.
core   +1 more source

Anomalous U(1) extension of the Standard Model

open access: yesJournal of High Energy Physics
We present a set of example models in which the Standard Model (SM) symmetry group is extended by a new abelian symmetry. This additional symmetry appears anomalous in the effective low-energy theory; however, the anomalies cancel out when massive chiral
Pascal Anastasopoulos   +3 more
doaj   +1 more source

Evolutionary tree reconstruction [PDF]

open access: yes
It is described how Minimum Description Length (MDL) can be applied to the problem of DNA and protein evolutionary tree reconstruction. If there is a set of mutations that transform a common ancestor into a set of the known sequences, and this ...
Cheeseman, Peter, Kanefsky, Bob
core   +1 more source

Knowledge Discovery in Distance Relay Event Report: A Comparative Data-Mining Strategy of Rough Set Theory With Decision Tree [PDF]

open access: green, 2010
Mohammad Lutfi Othman   +4 more
openalex   +1 more source

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