Results 21 to 30 of about 54,050 (267)

Changes in epigeic spider community in primary succession on a brown-coal dump

open access: yesArachnologische Mitteilungen, 1997
A descriptive model of primary succession of spiders on a brown-coal dump is presented. Multivariate methods (cluster analysis and detrended correspondence analysis), and community indexes were applied to evaluate changes in community composition of ...
Pekár, Stanislav
doaj   +1 more source

Habitat of pre-hibernating larvae of the endangered butterfly Euphydryas aurinia (Lepidoptera: Nymphalidae): What can be learned from vegetation composition and architecture?

open access: yesEuropean Journal of Entomology, 2003
Habitats of pre-hibernating gregarious larvae of the endangered Marsh Fritillary butterfly (Euphydryas aurinia) were studied in field in Western Bohemia, Czech Republic.
Martin KONVICKA   +2 more
doaj   +1 more source

Detecting Ordinal Subcascades [PDF]

open access: yesNeural Processing Letters, 2020
AbstractOrdinal classifier cascades are constrained by a hypothesised order of the semantic class labels of a dataset. This order determines the overall structure of the decision regions in feature space. Assuming the correct order on these class labels will allow a high generalisation performance, while an incorrect one will lead to diminished results.
Ludwig Lausser   +4 more
openaire   +1 more source

ALL ordinals are cop-robber ordinals

open access: yesTheoretical Computer Science
The game of cops and robbers, played on a fixed graph $G$, is a two-player game, where the cop and the robber (the players) take turns in moving to adjacent vertices. The game finishes if the cop lands on the robber's vertex. In that case we say that the cop wins. If the cop can always win, regardless of the starting positions, we say that $G$ is a cop-
Jorge Cruz Chapital   +2 more
openaire   +2 more sources

Automatic Ordinals

open access: yesInt. J. Unconv. Comput., 2012
To appear in a Special Issue on New Worlds of Computation 2011 of the International Journal of Unconventional Computing.
Finkel, Olivier, Todorcevic, Stevo
openaire   +4 more sources

An ordinal minimax theorem [PDF]

open access: yesGames and Economic Behavior, 2016
In the early 1950s Lloyd Shapley proposed an ordinal and set-valued solution concept for zero-sum games called \emph{weak saddle}. We show that all weak saddles of a given zero-sum game are interchangeable and equivalent. As a consequence, every such game possesses a unique set-based value.
Felix Brandt 0001   +2 more
openaire   +2 more sources

Multivariate analysis for assessment of the tree populations based on dendrometric data with an example of similarity among Norway spruce subpopulations

open access: yesJournal of Forest Science, 2017
The new method for evaluation of tree populations presented here is based on a correlation analysis within a set of dendrometric variables. The correlation analysis is carried out for each population separately.
Karel MATĚJKA
doaj   +1 more source

State and development of phytocenoses on research plots in the Krkonoše Mts. forest stands

open access: yesJournal of Forest Science, 2010
The paper assesses the state and development of phytocenoses in beech, mixed and spruce stands on permanent research plots (PRP) 1-32 in the Krkonoše (Giant) Mts. in the years 1980-2005, i.e. during the air-pollution calamity and afterwards.
S. Vacek, K. Matějka
doaj   +1 more source

Annual course of temperature and precipitation as proximal predictors of birds’ responses to climatic changes on the species and community level

open access: yesFolia Oecologica, 2021
The study was conducted in the landscapes of south-eastern Ukraine during the nesting seasons 1988–2018. Within the landscape system associated with the Molochny Estuary, the ten most important ecosystem types were investigated, including the following ...
Koshelev Olexander   +3 more
doaj   +1 more source

Normalized Ordinal Distance; A Performance Metric for Ordinal, Probabilistic-ordinal or Partial-ordinal Classification Problems

open access: yes, 2013
© 2015 by Taylor & Francis Group, LLC. In this chapter, a novel application-independent performance metric for ordinal, probabilistic-ordinal, and partial-ordinal classification problems is introduced. Conventional performance metrics for ordinal classification problems, such as mean absolute error of consecutive integer labels and ranked probability ...
Bahari, Mohamad Hasan, Van hamme, Hugo
openaire   +2 more sources

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