نتایج جستجو برای: gold extraction

تعداد نتایج: 247363  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شهید بهشتی - دانشکده علوم 1372

a simple, sensitive and selective method for solvent extraction and spectrophotemetric determination of lanthanum (ii) europium (iii), and cerium (iii) is described , the rare earth metals are extracted into chloroform solution of n-phenylbenzohydroxamic acid (pbha) at ph 9-10 various parameters are studied to optimize the extraction conditions. the molar absorptivity is found to increase from ...

2015
Vít Baisa Barbora Ulipová Michal Cukr

We present a method of bilingual terminology extraction from parallel corpora and a few heuristics and experiments with improving the performance of the basic variant of the method. An evaluation is given using a small gold standard manually prepared for EnglishCzech language pair from DGT translation memory [1]. The bilingual terminology extraction (ABTE3) is available for several languages in...

1991
Nathan Intrator Joshua I. Gold Heinrich H. Bülthoff Shimon Edelman

Intrator (1990) proposed a feature extraction method that is related to recent statistical theory (Huber, 1985; Friedman, 1987), and is based on a biologically motivated model of neuronal plasticity (Bienenstock et al., 1982). This method has been recently applied to feature extraction in the context of recognizing 3D objects from single 2D views (Intrator and Gold, 1991). Here we describe expe...

2008
Peter Klügl Martin Atzmüller Frank Puppe

Information extraction is concerned with the location of specific items in textual documents. Common process models for this task use ad-hoc testing methods against a gold standard. This paper presents an approach for the testdriven development of complex information extraction systems. We propose a process model for test-driven information extraction, and discuss its implementation using the r...

2012
Elizaveta Loginova Anita Gojun Helena Blancafort Marie Guégan Tatiana Gornostay Ulrich Heid

In this paper, we discuss practical and methodological issues of the creation of reference term lists (RTLs) for the evaluation of monolingual and bilingual term candidate extraction from comparable corpora in the domains of wind energy and mobile technology. These reference term lists are intended to serve as a ”gold standard” for the qualitative and quantitative evaluation of automatic term e...

1993
Gregory Grefenstette

As large on-line corpora become more prevalent, a number of attempts have been made to automatically extract thesaurus-like relations directly from text using knowledge poor methods. In the absence of any specific application, comparing the results of these attempts is difficult. Here we propose an evaluation method using gold standards, i.e., pre-existing hand-compiled resources, as a means of...

1993
Gregory Grefenstette

As large on-line corpora become more prevalent, a number of attempts have been made to automatically extract thesaurus-like relations directly from text using knowledge poor methods. In the absence of any speciic application, comparing the results of these attempts is diicult. Here we propose an evaluation method using gold standards , i.e., pre-existing hand-compiled resources, as a means of c...

Journal: :The Science of the total environment 2000
R Santa Rosa R C Müller C N Alves J E Sarkis M H Bentes E Brabo E S de Oliveira

Gold extraction and its commercialization in the Amazon region is mainly by rudimentary procedures. Therefore, during the process of extraction and recovery of this precious metal, large amounts of mercury vapors are thrown into the environment. This paper is an attempt to establish a correlation between the concentration of total mercury in the urine of workers at the gold shop in the Municipa...

2011
Ekaterina Buyko Jörg Linde Steffen Priebe Udo Hahn

We introduce an approach to the automatic generation of biological pathway diagrams from scientific literature. It is composed of the automatic extraction of single interaction relations which are typically found in the full text (rather than the abstract) of a scientific publication, and their subsequent integration into a complex pathway diagram. Our focus is here on relation extraction from ...

2013
Magnus Merkel Jody Foo Lars Ahrenberg

In this paper a method and a flexible tool for performing monolingual term extraction is presented, based on the use of syntactic analysis where information on parts-of-speech, syntactic functions and surface syntax tags can be utilised. The standard approaches to evaluating term extraction, namely by manual evaluation of the top n term candidates or by comparing to a gold standard consisting o...

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