نتایج جستجو برای: کارکرد سیستم abc

تعداد نتایج: 99129  

Journal: :Molecular ecology 2009
Alan R Templeton

Nested clade phylogeographical analysis (NCPA) and approximate Bayesian computation (ABC) have been used to test phylogeographical hypotheses. Multilocus NCPA tests null hypotheses, whereas ABC discriminates among a finite set of alternatives. The interpretive criteria of NCPA are explicit and allow complex models to be built from simple components. The interpretive criteria of ABC are ad hoc a...

2009
Michiel de Bondt

The well-known ABC-conjecture is generally formulated as follows: The ABC-conjecture. Consider the set S of triples (A, B, C) ∈ N 3 such that ABC = 0, gcd{A, B, C} = 1 and A + B = C Then for every ǫ > 0, there exists a constant K ǫ such that C ≤ K ǫ · R(ABC) 1+ǫ for all triples (A, B, C) ∈ S, where R(ABC) denotes the square-free part of the product ABC. The ABC-conjecture is studied in many pap...

Journal: :CoRR 2008
Ping Li

We develop the concept of ABC-Boost (Adaptive Base Class Boost) for multi-class classification and present ABC-MART, a concrete implementation of ABC-Boost. The original MART (Multiple Additive Regression Trees) algorithm has been very successful in large-scale applications. For binary classification, ABC-MART recovers MART. For multi-class classification, ABC-MART considerably improves MART, a...

2012
Michael Beeson

An N-tiling of triangle ABC by triangle T (the “tile”) is a way of writing ABC as a union of N copies of T overlapping only at their boundaries. We continue the work of [1, 2] on classifying the possible triangle tilings. The results of all three papers together enable us to make some progress on two problems of Erdős about triangle tilings, one of which asks, “for which N is there an N-tiling ...

Journal: :Essays in biochemistry 2011
Marwan K Al-Shawi

ABC (ATP-binding cassette) transporters are arguably the most important family of ATP-driven transporters in biology. Despite considerable effort and advances in determining the structures and physiology of these transporters, their fundamental molecular mechanisms remain elusive and highly controversial. How does ATP hydrolysis by ABC transporters drive their transport function? Part of the pr...

2017
Subhash Patel Rajesh A Thakker

The artificial bee colony algorithm (ABC), a population based algorithm, provides solutions with better accuracy compared to other competitive population based algorithms. However, it suffers from slow convergence speed. We suggest modifications in search strategy of ABC to improve overall performance and named this modified algorithm, Efficient ABC algorithm (EABC). The performance of EABC is ...

2017
Monir Zaman Mohamed Elsayed

The study examines the perception of activity based costing (ABC) in Australian universities. Using a questionnaire survey, data was collected from twenty-six finance directors and/or chief financial officers in Australian universities. The perception of ABC implementation in Australian universities depends on many variables including the understanding of ABC, consideration of ABC as a strategi...

ژورنال: بیمارستان 2019

Background: Today, hospitals have faced many requests for quality services, while their costs are increasingly growing as well. These facts; Therefore, necessitate much more attention from hospital mangers in order to reduce healthcare costs. Moreover, the urgent need for a precise costing approach is more evident. Activity-based costing provides useful information on the activities required to...

Journal: :CoRR 2009
Ping Li

We develop abc-logitboost, based on the prior work on abc-boost[10] and robust logitboost[11]. Our extensive experiments on a variety of datasets demonstrate the considerable improvement of abc-logitboost over logitboost and abc-mart.

Journal: :J. Inf. Sci. Eng. 2016
Jenn-Long Liu Chung-Chih Li

This work proposes an improved artificial bee colony (ABC) algorithm, called the rank-based ABC algorithm, which includes a rank-based selection mechanism in the onlooker bees phase and a modified abandonment mechanism in the scout bees phase for solving unconstrained and constrained optimization problems. In the onlooker bees phase, the probability that an onlooker bee selects a food source is...

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