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Your search keyword '"Zhao, Yupeng"' showing total 283 results
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283 results on '"Zhao, Yupeng"'

15. Learning Seq2Seq Model with Dynamic Schema Linking for NL2SQL

Author

Ning, Xingxing, Zhao, Yupeng, liu, Jie, Filipe, Joaquim, Editorial Board Member, Ghosh, Ashish, Editorial Board Member, Prates, Raquel Oliveira, Editorial Board Member, Zhou, Lizhu, Editorial Board Member, Zhang, Ningyu, editor, Wang, Meng, editor, Wu, Tianxing, editor, Hu, Wei, editor, and Deng, Shumin, editor

Published
2022
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20. Metal Alloy‐Functionalized 3D‐Printed Electrodes for Nitrate‐to‐Ammonia Conversion in Zinc‐Nitrate Batteries.

Author

Liu, Si, Zhao, Yupeng, Chen, Zhengfan, Gao, Dandan, Feng, Fan, Rios‐Studer, Tobias, Bansmann, Joachim, Biskupek, Johannes, Kaiser, Ute, Liu, Rongji, and Streb, Carsten

Subjects
POLYMER electrodes, ELECTROLESS plating, METAL coating, PHOTOELECTRON spectroscopy, ALLOYS
Abstract

Electrocatalytic nitrate reduction is a promising approach to remove harmful nitrate and produce ammonia in aqueous media. Here, we demonstrate how 3D printed polymer electrodes can be electroless plated with a bimetallic NiCu alloy film suitable for sustained nitrate‐to‐ammonia reduction. Characterization by powder X‐ray diffraction, X‐ray photoelectron spectroscopy, scanning/transmission electron microscopy and energy‐dispersive X‐ray spectroscopy indicate that the electrode has a two‐layer structure consisting of polymer/ coating layer of metal alloys. The composite electrode shows high‐performance in the nitrate‐to‐ammonia electroreduction, giving NH3 Faradaic efficiencies of up to 83 % and NH3 yield rates up to 860 μg/(h cm2) at −0.38 V vs. RHE. We show that the electrode can easily be integrated into a Zn‐nitrate battery, giving a power density of 3.8 mW cm−2 with continuous NH3 production. The system combines three productive outputs, that is removal of nitrate pollutants, synthesis of valuable ammonia and generation of "green" electricity. [ABSTRACT FROM AUTHOR]

Published
2024
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21. Hyperpolarized Water for Coronary Artery Angiography and Whole-Heart Myocardial Perfusion Quantification.

Author

Zhao, Yupeng, Lerche, Mathilde Hauge, Karlsson, Magnus, Olin, Rie Beck, Hansen, Esben Søvsø Szocska, Aastrup, Malene, Redda, Mohsen, Laustsen, Christoffer, Hanson, Lars G., and Ardenkjær-Larsen, Jan Henrik

Subjects
POLARIZATION (Nuclear physics), CORONARY angiography, CORONARY arteries, PERFUSION imaging, MAGNETIC resonance angiography
Abstract

Purpose: Water freely diffuses across cell membranes, making it suitable for measuring absolute tissue perfusion. In this study, we introduce an imaging method for conducting coronary artery angiography and quantifying myocardial perfusion across the entire heart using hyperpolarized water. Methods: 1H was hyperpolarized using dissolution dynamic nuclear polarization (dDNP) with UV-generated radicals. Submillimeter resolution coronary artery images were acquired as 2D projections using a spoiled GRE (SPGRE) sequence gated on diastole. Dynamic perfusion images were obtained with a multi-slice SPGRE with diastole gating, covering the entire heart. Perfusion values were analyzed through histograms, and the most frequent estimated perfusion value (the mode of the distribution), was compared with the average values for 15O water PET from the literature. Results: A liquid state polarization of 10% at the time of the injection and a 30 s T1 in D2O TRIS buffer were measured. Both coronary artery and dynamic perfusion images exhibited good quality. The main and small coronary artery branches were well resolved. The most frequent estimated perfusion value is around 0.6 mL/g/min, which is lower than the average values obtained from the literature for 15O-water PET (around 1.1 and 1.5 mL/g/min). Conclusions: The study successfully demonstrated the feasibility of achieving high-resolution, motion-free coronary artery angiography and 3D whole-heart quantitative myocardial perfusion using hyperpolarized water. [ABSTRACT FROM AUTHOR]

Published
2024
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45. A constrained decomposition method for myocardial perfusion quantification using hyperpolarized MRI

Author

Zhao, Yupeng, Olin, Rie Beck, Søvsø Szocska Hansen, Esben, Laustsen, Christoffer, Ardenkjær-Larsen, Jan Henrik, and Hanson, Lars G.

Subjects
Perfusion, Myocardium
Abstract

As an alternative to Gadolinium, metabolically inert hyperpolarized contrast agents have been used in perfusion studies. For myocardial perfusion measurements, it is challenging to reliably obtain perfusionrelated signals due to partial volume effects. We propose a constrained decomposition approach, enforcing prior knowledge of the residue function being temporally decreasing. The method is capable of separating the arterial and perfusion components and the quantified perfusion map is not visibly affected by partial volume effects.

Published
2023

46. 3D myocardial perfusion quantification using hyperpolarized HP001

Author

Zhao, Yupeng, Olin, Rie Beck, Hanson, Lars G., Søvsø Szocska Hansen, Esben, Laustsen, Christoffer, and Ardenkjær-Larsen, Jan Henrik

Subjects
Perfusion Imaging, Hyperpolarized MR (Non-Gas)
Abstract

We propose a 3D gradient echo sequence with hyperpolarized HP001 as contrast agent for whole heart myocardial perfusion quantification. The estimated perfusion values are correlated with the perfusion values estimated from dynamic contrast enhanced (DCE)-MRI.

Published
2023

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