| 1. |
- Kristan, Matej, et al.
(författare)
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The Visual Object Tracking VOT2017 challenge results
- 2017
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Ingår i: 2017 IEEE INTERNATIONAL CONFERENCE ON COMPUTER VISION WORKSHOPS (ICCVW 2017). - : IEEE. - 9781538610343 ; , s. 1949-1972
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Konferensbidrag (refereegranskat)abstract
- The Visual Object Tracking challenge VOT2017 is the fifth annual tracker benchmarking activity organized by the VOT initiative. Results of 51 trackers are presented; many are state-of-the-art published at major computer vision conferences or journals in recent years. The evaluation included the standard VOT and other popular methodologies and a new "real-time" experiment simulating a situation where a tracker processes images as if provided by a continuously running sensor. Performance of the tested trackers typically by far exceeds standard baselines. The source code for most of the trackers is publicly available from the VOT page. The VOT2017 goes beyond its predecessors by (i) improving the VOT public dataset and introducing a separate VOT2017 sequestered dataset, (ii) introducing a realtime tracking experiment and (iii) releasing a redesigned toolkit that supports complex experiments. The dataset, the evaluation kit and the results are publicly available at the challenge website(1).
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| 2. |
- Man, Zhang, et al.
(författare)
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Facile one-step synthesis and enhanced photocatalytic activity of WC/ferroelectric nanocomposite
- 2021
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Ingår i: Journal of Materials Chemistry A. - : Royal Society of Chemistry. - 2050-7488 .- 2050-7496. ; 9:40, s. 22861-22870
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Tidskriftsartikel (refereegranskat)abstract
- The development of noble-metal-free co-catalysts is seen as a viable strategy for improving the performance of semiconductor photocatalysts. Although the photocatalytic efficiency of ferroelectrics is typically low, it can be enhanced through the incorporation of a co-catalyst into nanocomposites. Here, we demonstrate the influence of ferroelectricity on the decolorization of rhodamine B under simulated solar light using RbBi2Ti2NbO10 and compared the performance with that of non-ferroelectric RbBi2Nb5O16. The decolorization rate for RbBi2Ti2NbO10 was 5 times greater than that of RbBi2Nb5O16. This behaviour can be explained in terms of ferroelectric polarization, which drives the separation of charge carriers. The photocatalytic activity of RbBi2Ti2NbO10 was further enhanced to over 30 times upon preparing a nanocomposite with tungsten carbide (WC) through high energy ball milling. This enhancement was attributed not only to the increased specific surface area, but also to the incorporated WC co-catalyst, which also serves as a source of plasmonic hot electrons and extends the photocatalytic activity into the visible light range. The WC/RbBi2Ti2NbO10 nanocomposite shows interesting water oxidation properties and evolves O-2 with a rate of 68.5 mu mol h(-1) g(-1) and a quantum yield of 3% at 420 nm. This work demonstrates a simple route for preparing WC containing nano-ferroelectric composites for solar energy conversion applications.
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| 3. |
- Zhang, Li, et al.
(författare)
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Characterization of anti-BCG benz[α]anthraquinones and new siderophores from a Xinjiang desert-isolated rare actinomycete Nocardia sp. XJ31
- 2020
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Ingår i: Applied Microbiology and Biotechnology. - : Springer Science and Business Media LLC. - 0175-7598 .- 1432-0614. ; 104:19, s. 8267-8278
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Tidskriftsartikel (refereegranskat)abstract
- The current global demand for novel anti-TB drugs has drawn urgent attention on the discovery of natural product compounds with anti-TB activity. Lots of efforts have emphasized on environmental samples from unexplored or underexplored natural habits and identified numerous rare actinomycete taxa producing structurally diverse bioactive natural products. Herein, we report a survey of the rare actinobacteria diversity in Xinjiang region together with the discovery of anti-TB active natural products from these strains. We have collected 17 soil samples at different sites with different environmental conditions, from which 39 rare actinobacteria were identified by using a selective isolation strategy with 5 media variations. Among those isolated strains, XJ31 was identified as a new Nocardia sp. based on 16S rRNA gene analysis. Through one strain-many compounds (OSMAC) strategy combined with anti-Bacillus Calmette-Guérin bioassay-guided isolation, two groups of compounds were identified. They were twelve siderophores (nocardimicins, 1-12) and two anthraquinones (brasiliquinones, 13 and 14) and ten of them were identified as new compounds. The structures of the purified compounds were elucidated using HR-ESI-MS, 1D NMR, and 2D NMR techniques. The anti-TB bioassays revealed that the two benz[α]anthraquinones have potent activity against BCG (MICs = 25 μM), which can be used as a promising start point for further anti-TB drug development.
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| 4. |
- Zhu, Wenhao, et al.
(författare)
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Prognostic implications of residual mild coarctation gradient after interventional repair
- 2024
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Ingår i: The Journal of Clinical Hypertension. - : John Wiley & Sons. - 1524-6175 .- 1751-7176.
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Tidskriftsartikel (refereegranskat)abstract
- There is limited data on the prognostic implications of residual mild coarctation (RMC) in patients with repaired native coarctation of the aorta (CoA). To explore the association of RMC with mid-term comorbidities in post-interventional patients, and the predictive value of the residual pressure gradient. The authors retrospectively analyzed 79 native CoA patients who received successful intervention at our hospital between October 2010 and June 2023. The outcomes of the study were late arterial hypertension (either raised blood pressure or commencement of hypotensive medications) only in normotensive patients at early follow-up and the composite mid-term comorbidities including new-onset aortic injury, re-stenosis, and re-intervention. At a median follow-up of 60 months, late hypertension and mid-term comorbidities occurred in 16 (28.1%) and nine (11.4%) patients, respectively. Multivariate Cox proportional hazard regression analysis identified invasive peak systolic CoA pressure gradient (PSPG) as the best independent predictor of both outcomes. The maximally selected rank statistics indicated 10 mm Hg as the best PSPG cut-off value for predicting late hypertension. Compared to patients with PSPG < 11 mm Hg, the cumulative event rates of both outcomes were higher in those with PSPG ≥ 11 mm Hg (log-rank test, p <.001 for both endpoints). PSPG ≥ 11 mm Hg was proved to be the independent predictor of late hypertension with a significantly increased risk. In patients with non-surgical CoA repair, the post-interventional RMC and PSPG ≥11 mm Hg are important predictors of clinical comorbidities at mid-term follow-up.
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| 5. |
- Alimena, Juliette, et al.
(författare)
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Searching for long-lived particles beyond the Standard Model at the Large Hadron Collider
- 2020
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Ingår i: Journal of Physics G. - : IOP Publishing. - 0954-3899 .- 1361-6471. ; 47:9
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Tidskriftsartikel (refereegranskat)abstract
- Particles beyond the Standard Model (SM) can generically have lifetimes that are long compared to SM particles at the weak scale. When produced at experiments such as the Large Hadron Collider (LHC) at CERN, these long-lived particles (LLPs) can decay far from the interaction vertex of the primary proton-proton collision. Such LLP signatures are distinct from those of promptly decaying particles that are targeted by the majority of searches for new physics at the LHC, often requiring customized techniques to identify, for example, significantly displaced decay vertices, tracks with atypical properties, and short track segments. Given their non-standard nature, a comprehensive overview of LLP signatures at the LHC is beneficial to ensure that possible avenues of the discovery of new physics are not overlooked. Here we report on the joint work of a community of theorists and experimentalists with the ATLAS, CMS, and LHCb experiments-as well as those working on dedicated experiments such as MoEDAL, milliQan, MATHUSLA, CODEX-b, and FASER-to survey the current state of LLP searches at the LHC, and to chart a path for the development of LLP searches into the future, both in the upcoming Run 3 and at the high-luminosity LHC. The work is organized around the current and future potential capabilities of LHC experiments to generally discover new LLPs, and takes a signature-based approach to surveying classes of models that give rise to LLPs rather than emphasizing any particular theory motivation. We develop a set of simplified models; assess the coverage of current searches; document known, often unexpected backgrounds; explore the capabilities of proposed detector upgrades; provide recommendations for the presentation of search results; and look towards the newest frontiers, namely high-multiplicity 'dark showers', highlighting opportunities for expanding the LHC reach for these signals.
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| 6. |
- Campbell, Matthew P, et al.
(författare)
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Toolboxes for a standardised and systematic study of glycans
- 2014
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Ingår i: BMC Bioinformatics. - 1471-2105. ; 15:Suppl. 1
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Tidskriftsartikel (refereegranskat)abstract
- Abstract Background Recent progress in method development for characterising the branched structures of complex carbohydrates has now enabled higher throughput technology. Automation of structure analysis then calls for software development since adding meaning to large data collections in reasonable time requires corresponding bioinformatics methods and tools. Current glycobioinformatics resources do cover information on the structure and function of glycans, their interaction with proteins or their enzymatic synthesis. However, this information is partial, scattered and often difficult to find to for non-glycobiologists. Methods Following our diagnosis of the causes of the slow development of glycobioinformatics, we review the "objective" difficulties encountered in defining adequate formats for representing complex entities and developing efficient analysis software. Results Various solutions already implemented and strategies defined to bridge glycobiology with different fields and integrate the heterogeneous glyco-related information are presented. Conclusions Despite the initial stage of our integrative efforts, this paper highlights the rapid expansion of glycomics, the validity of existing resources and the bright future of glycobioinformatics.
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| 7. |
- Fan, Jingyu, et al.
(författare)
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On the heat transfer enhancement based on micro-scale air impingingment jets with microstructure heat sink in electronics cooling
- 2006
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Ingår i: 2006 Conference on High Density Microsystem Design and Packaging and Component Failure Analysis, HDP'06; Shanghai; China; 27 June 2006 through 28 June 2006. - 9781424404889 ; , s. 120-124
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Konferensbidrag (refereegranskat)abstract
- A conceptual heat transfer enhancement scheme in electronic cooling is analyzed on the basis of micro-scale impinging jet array with microstructure heat sink. The cooling performance of the micro impinging jet array is discussed and compared with that of conventional large-scale jet impingement cooling, and the pressure drop due to the induced crossflow is a vital factor for the former. The primary mechanisms by which the different types of the microstructure heat sinks affect the heat transfer rate as well as the pressure drop for the micro impinging jet array are empirically analyzed and discussed. In any case, it is necessary to make a proper compromise between the enhanced heat transfer rate and the acceptable pressure drop for the removal of high chip heat fluxes by combining the micro impinging jet array with micro-structured surface.
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| 8. |
- Sun, Yufu, et al.
(författare)
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Microstructural and properties evolution of austenitic heat resistant steel after addition of aluminium
- 2013
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Ingår i: Materials Science and Technology. - : Maney Publishing. - 0267-0836 .- 1743-2847. ; 29:5, s. 511-516
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Tidskriftsartikel (refereegranskat)abstract
- Effect of aluminium on microstructure and properties of austenitic heat resistant steel was investigated. The results showed that Al addition led to formation of spheroidal and dispersed Ni3Al. After solution treatment, Ni3Al particles experienced a significant refinement from 1.5 mu m to nanoscale (similar to 80 nm). Matrix transformed from austenite to ferrite when addition of Al was >4.72%. Oxidation resistance of samples containing 4.72% Al was two times higher than Al free samples due to the formation of compacted Al2O3 scales. Excessive Al resulted in the formation of Al3Fe5O12 and AlN on oxidation surface, which destroyed the oxidation resistance. Dispersedly precipitated Ni3Al effectively supported the matrix and enhanced the wear resistance, and samples containing 4.72% Al performed similar to 80% higher in wear resistance than Al free samples. Al significantly improved the microstructure and the properties of austenitic heat resistant steel, and samples containing 4.72% Al performed the optimal combination properties.
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| 9. |
- Zhang, Yan, 1976, et al.
(författare)
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Experimental study of Electrical properties and stability of CNT bumps in high density interconnects
- 2013
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Ingår i: Proceedings of the IEEE Conference on Nanotechnology. - 1944-9399 .- 1944-9380. - 9781479906758 ; , s. 1085-1088
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Konferensbidrag (refereegranskat)abstract
- With the minimization development of electronic devices and products, nanotechnology and nanomaterials are widely applied in different fields of electronic packaging. Carbon nanotube (CNT) is an ideal material due to its excellent electrical and thermal conductivities. In the present paper, the application of CNT bundles as chip bumps was experimentally investigated. The electrical resistances of the CNT interconnects were measured, and the thermal and humidity test were conducted. In addition, the CNT forests on fine pitch copper lines under various environmental test conditions were observed to evaluate the stability. © 2013 IEEE.
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| 10. |
- Zhang, Yan, 1976, et al.
(författare)
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Experimental Study on the Mechanical Reliability of Carbon Nanotubes
- 2013
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Ingår i: Proceedings of the 14 th International Conference on Electronics Packaging (ICEPT). - 9781479904990 ; , s. 105-108
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Konferensbidrag (refereegranskat)abstract
- Robust and reliable interconnect and effective heat management are two major concerns in the high-speed and high-power integrated circuit. Carbon nanotube (CNT) exhibits amazing mechanical, thermal and electronic properties due to the unique structure. Those superior features make CNTs preferable and promising for application in electronic components and devices. In the present paper, carbon nanotube bundles with an array pattern are fabricated, and then their mechanical strength and reliability are investigated experimentally. Different pressure loadings are applied on the surfaces of the CNT bundles and their deformation during loading process are observed. Furthermore, the responses of the CNT bundles under airflow impingement are studied. Various damage modes occur in the different loading conditions.
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