112 research outputs found
Investigations on physicochemical properties and electrochemical performance of graphite felt and carbon felt for ironâchromium redox flow battery
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Unsupervised Deep Cross-Language Entity Alignment
Cross-lingual entity alignment is the task of finding the same semantic
entities from different language knowledge graphs. In this paper, we propose a
simple and novel unsupervised method for cross-language entity alignment. We
utilize the deep learning multi-language encoder combined with a machine
translator to encode knowledge graph text, which reduces the reliance on label
data. Unlike traditional methods that only emphasize global or local alignment,
our method simultaneously considers both alignment strategies. We first view
the alignment task as a bipartite matching problem and then adopt the
re-exchanging idea to accomplish alignment. Compared with the traditional
bipartite matching algorithm that only gives one optimal solution, our
algorithm generates ranked matching results which enabled many potentials
downstream tasks. Additionally, our method can adapt two different types of
optimization (minimal and maximal) in the bipartite matching process, which
provides more flexibility. Our evaluation shows, we each scored 0.966, 0.990,
and 0.996 Hits@1 rates on the DBP15K dataset in Chinese, Japanese, and French
to English alignment tasks. We outperformed the state-of-the-art method in
unsupervised and semi-supervised categories. Compared with the state-of-the-art
supervised method, our method outperforms 2.6% and 0.4% in Ja-En and Fr-En
alignment tasks while marginally lower by 0.2% in the Zh-En alignment task.Comment: 17 pages,5 figures, Accepted by ECML PKDD 2023(Research Track
Three-dimensional printing-guided percutaneous transcatheter closure of secundum atrial septal defect with rim deficiency: First-in-human series
Background: This study aimed to prospectively evaluate the use of 3-dimensional printing (3DP) for the percutaneous transcatheter closure of a secundum atrial septal defect (ASD) with rim deficiency less than 5 mm.Methods: Patients with ASD were scanned using multi-slice computed tomography to acquire raw data for virtual 3DP reconstruction models. Different ASD occluders were tried on the 3DP models to select the optimal size for intraoperative use. The patients were followed up 1 month postoperatively, and 3DP models were again manufactured to observe the operative effects.Results: From January to April 2016, 6 patients (5 females and 1 male) were recruited. Their average age was 29.5 ± 17.6 years, and the mean ASD size was 13.4 ± 1.3 mm. ASD occlusion succeeded in 5 of 6 cases. There were 1, 2, and 3 cases with 0-mm distance from the defect rim to the aorta, inferior vena cava, and superior vena cava, respectively. ASD occluder sizes were consistent between preoperative simulation and intraoperative placement in 4 cases. One case had occluder size change from 30 mm to 34 mm.Conclusions: A 3DP model presents ASD in a more visible way and allows more direct preoperativesimulation to choose the most appropriate size of occluder, as compared with conventional imaging techniques. This technique is likely to extend the current indications for ASD with an insufficient rim
The distribution and concentration of particulate biogenic silica in surface waters of Prydz Bay, Antarctica, during the austral summer of 2011
The concentrations and distributions of particulate biogenic silica (PBSi) in the upper surface waters of Prydz Bay, Antarctica, were investigated during the 27th Chinese National Antarctic Research Expedition cruises of January 2011. We aimed to characterize the correlations between PBSi and plankton, nutrients and particulate organic carbon. The results showed that the concentrations of biogenic silica ranged from 0.76â19.72 ÎŒmolâdm-3 and the average concentration of biogenic silica was 6.06 ÎŒmolâdm-3. The distribution of surface PBSi had significant regional characteristics: The concentrations were higher south of 67°S than to the north. The distribution of PBSi, chlorophyll a and particulate organic carbon showed similar patterns, and PBSi distribution had a negative correlation with that of silicate. In the vertical direction, the mole ratio of PBSi and POC (Sibio/Corg) decreased with increasing depth. This trend indicated a higher rate of PBSi dissolution, or a lower rate of organic matter remineralization rate, in the upper 200 m
The content and distribution of Ge in the sediments of Prydz Bay, Antarctica
The content and distribution of Ge is investigated in sediments from the Southern Ocean (Prydz Bay, Antarctica). The content of Getotal in the sediments ranges from 1.14Ă10-6 to 2.35Ă10-6 (average of 1.71Ă10-6) and the highest value occurs at station P3-9 where water depth is > 1 000 m. The lowest value occurs at station P4-13 which is near the edge of the Amery ice shelf. The surface sediments have 16%â68% Gebio within Getotal. The distribution trends of Gebio and Getotal are generally similar, and the values outside Prydz Bay are higher than within the bay, bounded at 67°S. The vertical distribution of Ge in sediment cores presents higher values at the surface than in underlying sediments. Values of Gebio appear to positively correlate with biogenic silica (BSiO2) in surface sediments from non-polynyas sea. The vertical distribution of Gebio and BSiO2 is similar in sediments of station P3-16
Effect of Grain Coalescence on Dislocation and Stress Evolution of GaN Films Grown on Nanoscale Patterned Sapphire Substrates
Two types of nucleation layers (NLs), including in-situ low-temperature grown
GaN (LT-GaN) and ex-situ sputtered physical vapor deposition AlN (PVD-AlN), are
applied on cone-shaped nanoscale patterned sapphire substrate (NPSS). The
initial growth process of GaN on these two NLs is comparably investigated by a
series of growth interruptions. The coalescence process of GaN grains is
modulated by adjusting the three-dimensional (3D) temperatures. The results
indicate that higher 3D temperatures reduce the edge dislocation density while
increasing the residual compressive stress in GaN films. Compared to the LT-GaN
NLs, the PVD-AlN NLs effectively resist Ostwald ripening and facilitate the
uniform growth of GaN grains on NPSS. Furthermore, GaN films grown on NPSS with
PVD-AlN NLs exhibit a reduction of over 50% in both screw and edge dislocation
densities compared to those grown on LT-GaN NLs. Additionally, PVD-AlN NLs
result in an increase of about 0.5 GPa in the residual compressive stress
observed in GaN films
Retinoic acid combined with spermatogonial stem cell conditions facilitate the generation of mouse germ-like cells
Bioaccumulation of Hg in rice leaf facilitates selenium bioaccumulation in rice (Oryza sativa L.) leaf in the Wanshan mercury mine
Mercury (Hg) bioaccumulation in rice poses a health issue for rice consumers. In rice paddies, selenium (Se) can decrease the bioavailability of Hg through forming the less bioavailable Hg selenides (HgSe) in soil. Rice leaves can directly uptake a substantial amount of elemental Hg from the atmosphere, however, whether the bioaccumulation of Hg in rice leaves can affect the bioaccumulation of Se in rice plants is not known. Here, we conducted field and controlled studies to investigate the bioaccumulation of Hg and Se in the rice-soil system. In the field study, we observed a significantly positive correlation between Hg concentrations and BAFs of Se in rice leaves (r2 = 0.60, p < 0.01) collected from the Wanshan Mercury Mine, SW China, suggesting that the bioaccumulation of atmospheric Hg in rice leaves can facilitate the uptake of soil Se, perhaps through the formation of Hg-Se complex in rice leaves. This conclusion was supported by the controlled study, which observed significantly higher concentrations and BAFs of Se in rice leaf at a high atmospheric Hg site at WMM, compared to a low atmospheric Hg site in Guiyang, SW China
Evaluation of association tests for rare variants using simulated data sets in the Genetic Analysis Workshop 17 data
We evaluate four association tests for rare variantsâthe combined multivariate and collapsing (CMC) method, two weighted-sum methods, and a variable threshold methodâby applying them to the simulated data sets of unrelated individuals in the Genetic Analysis Workshop 17 (GAW17) data. The family-wise error rate (FWER) and average power are used as criteria for evaluation. Our results show that when all nonsynonymous SNPs (rare variants and common variants) in a gene are jointly analyzed, the CMC method fails to control the FWER; when only rare variants (single-nucleotide polymorphisms with minor allele frequency less than 0.05) are analyzed, all four methods can control FWER well. All four methods have comparable power, which is low for the analysis of the GAW17 data sets. Three of the methods (not including the CMC method) involve estimation of p-values using permutation procedures that either can be computationally intensive or generate inflated FWERs. We adapt a fast permutation procedure into these three methods. The results show that using the fast permutation procedure can produce FWERs and average powers close to the values obtained from the standard permutation procedure on the GAW17 data sets. The standard permutation procedure is computationally intensive
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