نتایج جستجو برای: because some environmental phenomena are inherently spatial
تعداد نتایج: 6160429 فیلتر نتایج به سال:
Different groups of animals show phenotypic characters, which have been resulted by the reductive phenomena. The examples are the absence of pigmentation; dwindle of eyes in some cave-living animals, and also the absence of scale in some fishes. These characters are often leaded to evolution of new species with special adaptation that is so called "Regressive evolution". The reductive phenomena...
this experimental study has been conducted to test the effect of oral presentation on the development of l2 learners grammar. but this oral presentation is not merely a deductive instruction of grammatical points, in this presentation two hypotheses of krashen (input and low filter hypotheses), stevicks viewpoints on grammar explanation and correction and widdowsons opinion on limited use of l1...
one of the most important number sequences in mathematics is fibonacci sequence. fibonacci sequence except for mathematics is applied to other branches of science such as physics and arts. in fact, between anesthetics and this sequence there exists a wonderful relation. fibonacci sequence has an importance characteristic which is the golden number. in this thesis, the golden number is observed ...
The coupling of sensors with mobile phones, which are ubiquitously available and location aware, opens the door to the creation of applications for pervasive sensing and detailed spatial modeling of environmental phenomena. In order to ensure widespread participation of mobile users, these applications must have limited per-device resource requirements, must place no expectations on individual ...
in this thesis, first the notion of weak mutual associativity (w.m.a.) and the necessary and sufficient condition for a $(l,gamma)$-associated hypersemigroup $(h, ast)$ derived from some family of $lesssim$-preordered semigroups to be a hypergroup, are given. second, by proving the fact that the concrete categories, semihypergroups and hypergroups have not free objects we will introduce t...
this study investigates the effectiveness of the kriging interpolation model and the emission weighted proximity model (ewpm) in assessing relative exposure risk of air pollution using results from the american meteorological society/epa regulatory model (aermod) as benchmarks. we used simulated exposure risk to so2 in the dallas area in texas in this evaluation. results suggest that the relati...
Wireless networks are inherently graph-structured, in which, graph representation learning can be utilized to solve complex network optimization problems. In learning, feature vectors for each entity the calculated such that they could capture spatial and temporal dependencies their local global neighborhoods. Specifically, neural (GNNs) powerful tools these problems because of expressive reaso...
The atmospheric Ar/N2 ratio is expected to be useful as a tracer of air-sea heat exchange, but this application has been hindered in part due to sampling artifacts. Here we show that the variability in δ(Ar/N2) due to thermal fractionation at the inlet can be on the order of 40–80 per meg, and we introduce the use of an aspirated solar shield that successfully minimizes such fractionation. The ...
Abstract Ecological research has focused on the importance of environmental factors spatial biodiversity variations and organisation. This is important because scant conservation resources. We used stepwise backward selection random feature (RFE) to identify a parsimonious model that can predict species richness diversity metrics in response three models; biotic, abiotic, topo-edaphic. Our resu...
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