93 research outputs found
Relation-based document retrieval for biomedical IR
Virology, 351(2): pp. 271-279. http://dx.doi.org/10.1016/j.virol.2006.01.051In this paper, we explore the use of term relations in information retrieval
for precision-focused biomedical literature search. A relation is defined
as a pair of two terms which are semantically and syntactically related to each
other. Unlike the traditional “bag-of-word” model for documents, our model
represents a document by a set of sense-disambiguated terms and their binary
relations. Since document level co-occurrence of two terms, in many cases,
does not mean this document addresses their relationships, the direct use of relation
may improve the precision of very specific search, e.g. searching documents
that mention genes regulated by Smad4. For this purpose, we develop a
generic ontology-based approach to extract terms and their relations, and present
a betweenness centrality based approach to rank retrieved documents. A
prototyped IR system supporting relation-based search is then built for Medline
abstract search. We use this novel IR system to improve the retrieval result of
all official runs in TREC-2004 Genomics Track. The experiment shows promising
performance of relation-based IR. The average P@100 (the precision of
top 100 documents) for 50 topics is significantly raised from 26.37 %( the
P@100 of the best run is 42.10%) to 53.69% while the MAP (mean average
precision) is kept at an above-average level of 26.59%. The experiment also
shows the expressiveness of relations for the representation of information
needs, especially in the area of biomedical literature full of various biological
relations
Quick and efficient co-treatment of Zn2+/Ni2+ and CN- via the formation of Ni(CN)4 2- intercalated larger ZnAl-LDH crystals
The wide use of metal electroplating involving CN- necessitates the cost-effective treatment of both CN and metals (Zn, Cu, Ni etc.). In this research, we developed a novel strategy - Ni2+-assisted layered double hydroxide (LDH) precipitation - to simultaneously remove aqueous CN and Zn/Ni metals. The strategy is to convert CN-/Zn(CN)(4)(2-) to Ni(CN)(4)(2-) first, and then to quickly precipitate Ni(CN)(4)(2-)/CN- into LDH crystals. The conversion has been clearly evidenced by the change of CN characteristic FTIR bands of Zn-CN solution before and after adding Ni(NO3)(2). The intercalation and efficient removal of CN have also been confirmed through the formation of LDH crystals XRD and SEM. In particular, a set of optimized experimental factors has been obtained by investigating their effects on CN removal efficiency in the simulated tests. Remarkably, over 95% CN were removed with high removal efficiencies of metals. Our results thus suggest that the current strategy is a quick, efficient and promising way to simultaneously treat both Ni and metals/CN rich electroplating wastewaters. (C) 2014 Elsevier B.V. All rights reserved
Mining hidden connections among biomedical concepts from disjoint biomedical literature sets through semantic-based association rule
Paper accepted for publication in Journal of Information Systems. Retrieved 6/26/2006 from http://www.ischool.drexel.edu/faculty/thu/My%20Publication/Journal-papers/JIS_hu2006.pdf.The novel connection between Raynaud dise ase and fish oils was
uncovered from two disjointed biomedical literature sets by Swanson in 1986.
Since then, there have been many approaches to uncover novel connections
by mining the biomedical literature. One of the popular approaches is to adapt
the Association Rule (AR) method to automatically identify implicit novel
connections between concept A and concept C from two disjointed sets of
documents through intermediate B concept. Since A and C concepts do not
occur together in the same data set , the mining goal is to find novel connection
among A and C concepts in the disjoint data sets. It first applies association rul e
to the two disjointed biomedical literature sets separately to generate two rule
sets (AĂ B, BĂ C), and then applies transitive law to get the novel connection s
AĂ C. However, this approach generates a huge number of possible
connections among the millions of biomedical concepts and a lot of these
hypothetical connections are spurious, useless and/or biologically meaningless.
Thus it is essential to develop new approach to generate highly likely novel and
biologically relevant connections among the biomedical concepts. This paper
presents a Biomedical Semantic-based Association Rule System (Bio - SARS)
that significantly reduce spurious/useless/biologically irrelevant connections
through semantic filtering. Compared to other approaches such as LSI and
traditional association rule-based approach, our approach generates much fewer
rules and a lot of these rules represent relevant connections among biological
concepts
Improving the stability and efficiency of anaerobic digestion of food waste using additives: a critical review
Anaerobic digestion is an effective technology to treat food waste, with methane production as renewable bioenergy. However, there are two key problems in the practical application, i.e., poor system stability and low reactor efficiency. In this paper, additives used in anaerobic digestion of food waste were systematically reviewed in view of system stability and reactor efficiency. Enzymes showed excellent property in food waste pre-hydrolysis stage with almost all macromolecular matters being rapidly resolved. Fungi fermentation process to produce hydrolytic enzymes, can be regarded as a promising and low-cost way to realize rate-limiting step elimination. It can be also concluded that adding neutralizers, buffer chemicals and some other materials are effective to maintain the pH level for practical application. Trace metals in food waste are not enough but needed for methanogens activation in long term and high loading rate operation. In addition, direct interspecies electron transfer could be much helpful for intermediate refractory organic acids degradation and methanogenesis promotion with additives of conductive materials, which is also discussed and should be studied further in anaerobic digestion of food waste. Based on literature review, a new concept is proposed for further study, suggesting that after being well liquefied with enzyme pre-hydrolysis, food waste could be co-digested with landfill leachate in a high-rate anaerobic reactor stably, resulting in a high bioenergy recovery efficiency. (C) 2018 Elsevier Ltd. All rights reserved
Preparation and characterization of glazed tiles with high quantity of fly-ashes addition
CERAMICS, ISSN 1004-7840, 2/1993, PP.3-1
Research and production of glazed face-bricks made from fine coal ash
JINGDEZHEN’S CERAMICS, ISSN 1001-9545, 1994(TOTAL NO. 64), PP.1-8
Research and production of glazed face-bricks made from fine coal ash
JINGDEZHEN'S CERAMICS, ISSN 1001-9545, 1994(TOTAL NO. 64), PP.1-
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