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Three-dimensional interconnected Ni（Fe）OxHy nanosheets on stainless steel mesh as a robust integrated oxygen evolution electrode

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Nano Research 2018年第3期11卷 1294-1300页

作者： Qi Zhang Haixia Zhong Fanlu Meng Di Bao xinbo Zhang Xiaolin wei Hunan Key Laboratory for Micro-Nano Energy Materials and Device Department of Physics Xiangtan University Xiangtan 411105 China State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 China

The development of an electrocatalyst based on abundant elements for the oxygen evolution reaction （OER） is important for water splitting associated with renewable energy sources. In this study, we develop an interconnected Ni（Fe）OxHy nanosheet array on a stainless steel mesh （SSNNi） as an integrated OER electrode, without using any polymer binder. Benefiting from the well- defined three-dimensional （3D） architecture with highly exposed surface area, intimate contact between the active species and conductive substrate improved electron and mass transport capacity, facilitated electrolyte penetration, and improved mechanical stability. The SSNNi electrode also has excellent OER performance, including low overpotential, a small Tafel slope, and long-term durability in the alkaline electrolyte, making it one of the most promising OER electrodes developed.

关键词： oxygen evolution reaction three-dimensional (3D)architecture stainless steel mesh (SSNNi) integrated oxygenevolution electrode

Variational Approach to One-Dimensional Electrons Non- Adiabatically Coupled to Phonons

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Chinese Physics Letters 1999年第2期16卷 129-131页

作者： pang Xiao-feng Department of Physics Southwest Institute for NationalitiesChengdu 610041 International Centre for Material Physics Chinese Academy of SciencesShenyang 110015 Institute of Atomic and Molecular Physics Sichuan Union UniversityChengdu 610065

The effects of the nonadiabatic phonon behaviours on the ground state of the system and the quantum modifications of the polaron characteristics and the modification form of the uncertainty relation between the phonon coordinate and momentum due to fluctuations of the electron density in the coupled electron-phonon systems have been studied by using a new variational ansatz for coherent phonons with correlated displacement and squeezing including internations with *** correlated effect results in the following effect:(1)the energy of the ground state of the system is found to be lower than that for the phonons with uncorrelated displacement and squeezing;(2)the binding energy of the polaron was found to be increased;(3)the nonadiabatic coupling with electrons enhances the quantum uncertainty for the phonon coordinate and momentum when compared with the adiabatic and uncorrelated case.

关键词： phonon momentum coordinate

The elevation gradient of stable isotopes in precipitation in the eastern margin of Tibetan Plateau

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Science China Earth Sciences 2022年第10期65卷 1972-1984页

作者： Jie LI Zhonghe pang Engineering Research Center of Groundwater Pollution Control and Remediation of Ministry of Education College of Water SciencesBeijing Normal UniversityBeijing 100875China Key Laboratory of Shale Gas and Geoengineering Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China Innovation Academy of Earth Science Chinese Academy of SciencesBeijing 100029China University of Chinese Academy of Sciences Beijing 100049China Frontiers Science Center for Critical Earth Material Cycling Nanjing UniversityNanjing 210008China

Tibetan Plateau(TP)receives moistures from different directions,so variations of isotope elevation gradient on different sides may *** this study,we systematically monitored and modeled the elevation effect of stable isotopes in precipitation of the eastern margin of the Tibetan Plateau,where we collected 265 water samples for stable isotope(δ2H andδ^(18)O)analyses,of which 70 are eventful rainfall samples,and 195 are surface water samples,for *** lakes on the mountain peaks were used to reconstruct the average isotope composition of the local precipitation based on the evaporation *** elevation gradient of−4.2‰km^(−1)(R^(2)=0.93)was established for the eastern marginal region of *** elevation gradient was further confirmed by fractionation assessment using the Rayleigh fractionation *** is the highest ever reported for the TP and it is the highest as compared to those of all the other slopes as well as that of the interior part of the *** isotopes in the interior of TP show a lower elevation gradient,which is likely caused by significant local moisture *** paper also discusses the limitations of using river water samples to construct the elevation gradient.

关键词： Elevation gradient Stable isotopes Rayleigh fractionation Moisture recycling Tibetan Plateau

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Quantum-Mechanical Method for the Soliton Transported Bio-energy in Protein

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Chinese Physics Letters 1993年第7期10卷 437-440页

作者： pang Xiaofeng International Centre for Material Physics Academia SinicaShenyang 110015 CCAST(World Laboratory)P.O.Box 8730 Beijing 100080 Department of Physics Southwestern Institute for Nationalities Chengdu 610041

The equations of motion of the soliton transported bio-energy in the protein,were heretofore already obtained by a combination of quantum-mechanical and classical methods,but here have been derived based completely on quantum *** we point out the shortcoming of no self-consistency of the Davydov *** interesting results have also been got.

关键词： theory. quantum soliton

Stability of the Soliton Excited in Protein in the Biologic Temperature Range

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Chinese Physics Letters 1993年第9期10卷 573-576页

作者： pang Xiaofeng International Centre for Material Physics Academia.SinicaShenyang 110015 and CCAST(World Laboratory)P.O.Box 8730Beijing 100080 Department of Physics.Southwestern Institute for Nationalities Chengdu 610041

The thermal stability of the soliton excited in protein in the biological temperature range of 300-310K have been studied by means of the quantum theory in our *** lifetimes of the soliton obtained are in the range of 10^(-9)-10^(-8) s from *** result shows that the soliton is very stable in the biologic temperature range and quite useful in biological processes.

关键词： processes. theory. soliton

Editorial for the Special Issue on Switched-Capacitor Circuits and Partial Processing Techniques

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Chinese Journal of Electrical Engineering 2020年第4期6卷 1-2页

作者： Don Tan Yan-Fei Liu xinbo Ruan IEEE

Switched-capacitor circuits are gaining renewed interests for its capability of processing unregulated power with 99% duty ratio,ultra-high efficiency and ultra-high power *** various techniques,half-resonance circuit... 详细信息

关键词： power Switched circuits

Emission and capture characteristics of deep hole trap in n-GaN by optical deep level transient spectroscopy

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Journal of Semiconductors 2024年第3期45卷 58-63页

作者： Jin Sui Jiaxiang Chen Haolan Qu Yu Zhang Xing Lu xinbo Zou School of Information Science and Technology ShanghaiTech UniversityShanghai 201210China Shanghai Institute of Microsystem and Information Technology Chinese Academy of SciencesShanghai 200050China School of Microelectronics University of Chinese Academy of SciencesBeijing 100049China School of Electronics and Information Technology Sun Yat-sen UniversityGuangzhou 510275China

Emission and capture characteristics of a deep hole trap(H1)in n-GaN Schottky barrier diodes(SBDs)have been investigated by optical deep level transient spectroscopy(ODLTS).Activation energy(Eemi)and capture cross-section(σ_(p))of H1 are determined to be 0.75 eV and 4.67×10^(−15)cm^(2),*** of apparent trap concentration in space charge region is ***-enhanced emission process is revealed by decrease of emission time ***-boosted trap emission kinetics are analyzed by the Poole−Frenkel emission(PFE)*** addition,H1 shows point defect capture properties and temperature-enhanced capture *** both hole capture and emission processes into account during laser beam incidence,H1 features a trap concentration of 2.67×10^(15)cm^(−3).The method and obtained results may facilitate understanding of minority carrier trap properties in wide bandgap semiconductor material and can be applied for device reliability assessment.

关键词： GaN deep level transient spectroscopy minority carrier trap time constant trap concentration

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Global robust optimal sliding mode control for uncertain affine nonlinear systems

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Journal of Systems Engineering and Electronics 2009年第4期20卷 838-843页

作者： pang Haiping Chen Xia Coll. of Automation and Electronic Engineering Qingdao Univ. of Science and Technology Qingdao 266042 P. R. China

The problem of robustifying linear quadratic regulators （LQRs） for a class of uncertain affine nonlinear systems is considered. First, the exact linearization technique is used to transform an uncertain nonlinear system into a linear one and an optimal LQR is designed for the corresponding nominal system. Then, based on the integral sliding mode, a design approach to robustifying the optimal regulator is studied. As a result, the system exhibits global robustness to uncertainties and the ideal sliding mode dynamics is the same as that of the optimal LQR for the nominal system. A global robust optimal sliding mode control （GROSMC） is realized. Finally, a numerical simulation is demonstrated to show the effectiveness and superiority of the proposed algorithm compared with the conventional optimal LQR.

关键词： robust control optimal control sliding mode control nonlinear systems uncertain systems exact linearization.

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The Specific Heat Caused by Solitons in the Protein Molecules

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Chinese Physics Letters 1993年第6期10卷 381-384页

作者： pang Xiaofeng International Centre for Material Physics Academia SinicaShanyarig 110015 and CCAST(World Laboratory)Beijing 100080 Department of Physics Southwestern Institute for NationalitiesChengdu 610041

The property of specific heat caused by the solitons excited in the protein molecules has been discussed in terms of the equations of motion of operators for the excitons and the phonons in our *** values of specific heat arisen from the solitons are consistent completely with the experimental *** results obtained show ful1y that the soliton is existent indeed and biologically relevant in the protein molecules.

关键词： theory. solitons soliton