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- 2019
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Tidskriftsartikel (refereegranskat)
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| 2. |
- Chen, Zhongsheng, et al.
(författare)
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A Deterministic-Path Routing Algorithm for Tolerating Many Faults on Wafer-Level NoC
- 2019
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Ingår i: 2019 DESIGN, AUTOMATION and TEST IN EUROPE CONFERENCE and EXHIBITION (DATE). - : IEEE. - 9783981926323 - 9781728103310 ; , s. 1337-1342
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Konferensbidrag (refereegranskat)abstract
- Wafer-level NoC has emerged as a promising fabric to further improve supercomputer performance, but this new fabric may suffer from the many-fault problem. This paper presents a deterministic-path routing algorithm for tolerating many faults on wafer-level NoCs. The proposed algorithm generates routing tables using a breadth-first traversal strategy, and stores one routing table in each NoC switch. The switch will then transmit packages according to its routing table online. We use the Tarjan algorithm to dynamically reconfigure the routes to avoid the faulty nodes and develop the deprecated link/node rules to ensure deadlock-free communication of the NoCs. Experimental results demonstrate that the proposed algorithm does not only tolerate the effects of many faults, but also maximizes the available nodes in the reconfigured NoC. The performance of the proposed algorithm in terms of average latency, throughput, and energy consumption is also better than those of the existing solutions.
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| 3. |
- Jiang, Kang, et al.
(författare)
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Single platinum atoms embedded in nanoporous cobalt selenide as electrocatalyst for accelerating hydrogen evolution reaction
- 2019
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Ingår i: Nature Communications. - : Springer Science and Business Media LLC. - 2041-1723. ; 10
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Tidskriftsartikel (refereegranskat)abstract
- Designing efficient electrocatalysts for hydrogen evolution reaction is significant for renewable and sustainable energy conversion. Here, we report single-atom platinum decorated nanoporous Co0.85Se (Pt/np-Co0.85Se) as efficient electrocatalysts for hydrogen evolution. The achieved Pt/np-Co0.85Se shows high catalytic performance with a near-zero onset overpotential, a low Tafel slope of 35 mV dec(-1), and a high turnover frequency of 3.93 s(-1) at -100 mV in neutral media, outperforming commercial Pt/C catalyst and other reported transition-metal-based compounds. Operando X-ray absorption spectroscopy studies combined with density functional theory calculations indicate that single-atom platinum in Pt/np-Co0.85Se not only can optimize surface states of Co0.85Se active centers under realistic working conditions, but also can significantly reduce energy barriers of water dissociation and improve adsorption/desorption behavior of hydrogen, which synergistically promote thermodynamics and kinetics. This work opens up further opportunities for local electronic structures tuning of electrocatalysts to effectively manipulate its catalytic properties by an atomic-level engineering strategy.
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| 4. |
- Lou, Yanjing, et al.
(författare)
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Testing unidimensional species distribution models to forecast and hindcast changes in marsh vegetation over 40 years
- 2019
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Ingår i: Ecological Indicators. - : ELSEVIER SCIENCE BV. - 1470-160X .- 1872-7034. ; 104, s. 341-346
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Tidskriftsartikel (refereegranskat)abstract
- Species distribution models (SDM) predicting changes in species occurrences and abundance are increasingly being used as a tool in biogeography and conservation biology. However, we have little information on their predictive performance. Here we used archive-recorded predictor and field-observational verifier data associated with water level to evaluate the performance of response curves over 40 years for marsh plant species in Northeast China. A consensus approach (AUC: area-under-curve) was used as the test measure for internal evaluation and external evaluation (forecast and hindcast). Our results demonstrated that there is no significant differences between internal and external evaluation, and they both showed reasonable accuracy (AUC=0.73, respectively). There was considerable variation across species and projection direction in model accuracy, and accuracy of model fitting in internal evaluation and restricting the environmental range of data in different time periods may impact the performance of model projection over time. The performance of generalized additive models (GAM) is similar with that of extended Huisman-Olff-Fresco models (eHOF). Cover model is a little better than presence/absence models in prediction over time. Our findings provide some guidelines for the use of SDM for predictions under environmental change.
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| 5. |
- Sung, Yun Ju, et al.
(författare)
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A multi-ancestry genome-wide study incorporating gene-smoking interactions identifies multiple new loci for pulse pressure and mean arterial pressure
- 2019
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Ingår i: Human Molecular Genetics. - : Oxford University Press. - 0964-6906 .- 1460-2083. ; 28:15, s. 2615-2633
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Tidskriftsartikel (refereegranskat)abstract
- Elevated blood pressure (BP), a leading cause of global morbidity and mortality, is influenced by both genetic and lifestyle factors. Cigarette smoking is one such lifestyle factor. Across five ancestries, we performed a genome-wide gene–smoking interaction study of mean arterial pressure (MAP) and pulse pressure (PP) in 129 913 individuals in stage 1 and follow-up analysis in 480 178 additional individuals in stage 2. We report here 136 loci significantly associated with MAP and/or PP. Of these, 61 were previously published through main-effect analysis of BP traits, 37 were recently reported by us for systolic BP and/or diastolic BP through gene–smoking interaction analysis and 38 were newly identified (P < 5 × 10−8, false discovery rate < 0.05). We also identified nine new signals near known loci. Of the 136 loci, 8 showed significant interaction with smoking status. They include CSMD1 previously reported for insulin resistance and BP in the spontaneously hypertensive rats. Many of the 38 new loci show biologic plausibility for a role in BP regulation. SLC26A7 encodes a chloride/bicarbonate exchanger expressed in the renal outer medullary collecting duct. AVPR1A is widely expressed, including in vascular smooth muscle cells, kidney, myocardium and brain. FHAD1 is a long non-coding RNA overexpressed in heart failure. TMEM51 was associated with contractile function in cardiomyocytes. CASP9 plays a central role in cardiomyocyte apoptosis. Identified only in African ancestry were 30 novel loci. Our findings highlight the value of multi-ancestry investigations, particularly in studies of interaction with lifestyle factors, where genomic and lifestyle differences may contribute to novel findings.
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