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您的检索式：作者名="Mengpei Jiang"
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| 1 | Sparse current source reconstruction in MCG显示文摘Cardiac current source reconstruction is investigated by a fast greedy sparse(FGS) method applied to simulated and real magnetocardiography(MCG) data measured using 61-channel superconducting quantum interference device. The approach reduces the size of the lead field matrix based on a priori knowledge of dipolar magnetic field map. Consequently, the computational demands and the accuracy of sparse source reconstruction are improved simultaneously. The simulation results demonstrate that the FGS method is capable of reconstructing sparse equivalent current sources using the magnetic field data generated by a single current source with varying orientation or multiple current sources generated randomly. In addition, we analyze the cardiac current source reconstructed with real MCG data at typical instants and discuss the electrical excitation conduction during the QRS complex based on moving sparse source imaging. | Mengpei Chen Shiqin Jiang Lu Bing Chen Zhao Birgit Hailer Dietrich Gr nemeyer Peter Van Leeuwen | 2015 | Science Bulletin2015，60，14： | 0 |
| 2 | Electron transfer in Cu/Cu_(2)O generated by disproportionation promoting efficient CO_(2)photoreduction显示文摘Constructing a high-efficiency composite material for CO_(2)photoreduction is a key step to the achievement of carbon neutralization,but a comprehensive understanding of the factors that dictate CO_(2)reduction activity remains elusive.Here,we constructed a series of Cu in situ combined on Cu_(2)O(Cu/Cu_(2)O-1,-2,-3)via an acid disproportionation method with various processing time.The optimal photocatalyst(Cu/Cu_(2)O-2)affords CO at a rate of 10.43μmol·g^(−1)·h^(−1),which is more than fourfold to that of pristine Cu_(2)O.Electron transfer in the samples was detected by X-ray absorption spectroscopy(XAS)as well as X-ray photoelectron spectroscopy(XPS).Interestingly,the best photoreduction performance was not achieved by the sample possessing the most electron transfer(Cu/Cu_(2)O-1)but by the one with moderate electron transfer(Cu/Cu_(2)O-2).By virtue of density functional theory(DFT)calculations,a linear relationship between Bader charge variation(Δq)of the active sites and adsorption energy of CO_(2)reduction intermediates was discovered,wherein the moderate charge transfer corresponds to appropriate adsorption energy,which benefits CO_(2)photoreduction activity substantially.This work provides guidance for the construction of composite catalysts for efficient CO_(2)photoreduction in a perspective of the quantity of electron transfer. | Qian Zhu Kainan Zhu Minmin Cai Yaowen Zhang Zhiyu Shao Mengpei Jiang Xiyang Wang Zhibin Geng Xiaofeng Wu Manrong Li Keke Huang Shouhua Feng | 2022 | Nano Research2022，15，8： | 0 |
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