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2019 IEEE Sustainable Power and Energy Conference, iSPEC 2019

作者： Xiong, Dezhi Wen, He Chen, Shidong Zheng, Xiaoping Yang, Maotao Yang, Shuai Huang, Rui Su, Yuping State Grid Hunan Electric Power Limited Company Power Supply Service Center Metrology Center Hunan Province Key Laboratory of Intelligent Electrical Measurement and Application Technology Changsha China Weisheng Group Co. Ltd. Changsha Changsha China Hunan University College of Electrical and Information Engineering Changsha China

ISBN: (纸本)9781728149301

Aiming at the problem that impact load affects energy metering, a method and algorithm for impact load measurement are proposed. The point-by-point power calculation process of impact load and the specific parameters of impact load filter algorithm based on IIR low-pass filter are given. For the key parameters affecting the accurate measurement of impact load, the DC component calibration algorithm, voltage and current gain calibration algorithm, voltage and current offset calibration algorithm, active and reactive gain calibration algorithm, active and reactive offset calibration algorithms are proposed respectively. The impact load experiment scheme is designed, and the error experiments of the State grid meter algorithm and the paper algorithm are carried out respectively. The experimental results show that the overall measurement error of the proposed algorithm is better than the ordinary State Grid meter algorithm, which can accurately measure the impact load electrical energy. © 2019 IEEE.

关键词： Errors

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Analysis on Load Characteristics of Distributed Photovoltaic Access to EVs industry

Analysis on Load Characteristics of Distributed Photovoltaic...

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Sustainable Power and Energy Conference (iSPEC)

作者： Mouhai Liu Wei Zou Maotao Yang Rui Huang Shumin Wei Minqi Yu Hunan Province Key Laboratory of Intelligent Electrical Measurement and Application Technology State Grid Hunan Electric Power Company Changsha China

The load-characteristic charging of EVs and the power of distributed PVs have lately received great attention for car and electric industry due to their energy conservation and environmental friendliness. However, the disordered charging of EVs together with the distributed photovoltaic has made it challenging to meet the energy efficiency and electric quality. In an effort to overcome this challenge, the Monte Carlo method is adopted to calculate the charging load of EVs both in ordered and disordered way and the mathematical model of photovoltaic cell power is established. The reasonable dispatching in EVs and PVs is detailed demonstrated using MATLAB language, with certain day load in the area under the different circumstances. The proposed load characteristic method opens the door to research in the field of EVs and PVs, greatly enhancing the energy-using efficiency and the electric quality.

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Design Verification and Test Techniques for UHF RFID Tag IC

Design Verification and Test Techniques for UHF RFID Tag IC

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Sustainable Power and Energy Conference (iSPEC)

作者： Maotao Yang Shumin Wei Mouhai Liu Rui Huang Minqi Yu Fusheng Chen State Grid Hunan Electric Power Company Hunan Province Key Laboratory of Intelligent Electrical Measurement and Application Technology Changsha China

ISBN: (纸本)9781728149318

Radio Frequency Identification (RFID) technology has been rapidly developed in recent years. Electronic tag constitutes an important part of RFID system. This paper presents the design verification and test techniques suitable for UHF (Ultra High Frequency) RFID passive tag, which can meet the designers' demand for verification and test. Then, the IC baseband circuit test platform based on field programmable gate array is proposed. The platform can be used to verify the function of baseband circuit at design stage. It can also help designers with HDL (Hardware Description Language) code commissioning, so as to improve the reliability of circuit design, which can greatly improve the success rate of tape-out in practical applications. With regard to IC RF parameter test, this paper comes up with a low-cost test technical solution based on the commercially available card reader and the adjustable attenuator, which can be used to accurately measure the RF parameters such as IC sensitivity and input impedance without special RFID equipment, so as to guide the design of antenna and RFID. Based on the above-mentioned test scheme, the UHF RFID Tag IC that has been developed and taped out is tested in this paper.

关键词： UHF RFID tag IC baseband circuit sensitivity input impedance impedance design verification Radio frequency identification Ultrahigh frequencies Integrated circuits Field programmable gate arrays RFID tags Radio Frequency Identification Device Designers CARD READERS RFID system

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Defective perovskite supported palladium-nickel nanocatalyst for effective electrochemical nitrate reduction

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Applied Catalysis B: Environmental 2025年 375卷

作者： Xu, Min Dong, Shuyue Guo, Haoran Tao, Zhiruo Jeon, Yukwon Zhang, Ziyun Chen, Zhongjun Su, Hongyang Liu, Zhi Lin, Yuanhua Irvine, John T.S. Li, Tingshuai Chen, Di The Future Laboratory Tsinghua University Beijing100084 China School of Materials and Energy University of Electronic Science and Technology of China Chengdu611731 China Department of Chemistry Key Laboratory for Green Organic Synthesis and Application of Hunan Province Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education Xiangtan University Hunan 411105 China Department of Environmental and Energy Engineering Yonsei University 26493 Korea Republic of School of Physical Science and Technology ShanghaiTech University Shanghai201210 China Beijing Synchrotron Radiation Facility Beijing100084 China Center for Transformative Science ShanghaiTech University Shanghai201210 China State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University Beijing100084 China School of Chemistry University of St Andrews St AndrewsKY16 9ST United Kingdom

Electrochemical reduction of nitrate to ammonia is challenged by the high dissociation energy of nitrate, sluggish kinetics and competitive side reactions. This study proposes PdNi alloy nanocrystals, formed by Pd deposition mediated in situ generation of Ni metallic species over defective La0.52Ca0.28Ni0.06Ti0.94O3 perovskite nanofibers, as a catalyst for nitrate reduction reaction. Such catalyst delivers an NH3 yield rate of 21.13 mgh−1mg−1cat (about 4226 mgh−1mg−1Pd) and a maximum Faradaic efficiency of 98.78 % at −1.0 V. Theoretical studies reveal that the adjoining of PdNi nanocrystals and oxygen vacancies on perovskite facilitate the nitrate hydrogenation and reduces dissociation energy of nitrates by enhancing the adsorption of reaction intermediates and suppresses the hydrogen evolution reaction. This technique provides a way for developing advanced catalysts with metallic phases and oxygen vacancies for optimized electrochemical nitrate reduction. © 2025 Elsevier B.V.

关键词： Reaction intermediates

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Effect of Al2O3 modification on the properties of YSZ:corrosion resistant, wetting and thermal-mechanical properties

Effect of Al2O3 modification on the properties of YSZ:corros...

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第九届国际稀土开发与应用研讨会暨2019中国稀土学会学术年会

作者： Bingbing Yin Fan Zhang Wang Zhu Li Yang Yichun Zhou Key Laboratory of Low Dimensional Materials & Application Technology of Ministry of Education Xiangtan University Key Laboratory of Key Film Materials & Application for Equipment of Hunan province School of Materials Science and EngineeringXiangtan University

Calcium-magnesium-alumino-silicate（CMAS） corrosion is one of the main failure modes of thermal barrier coatings（TBCs）. Al O-modified YSZ（Y O-stabilised ZrO） coatings can resist it. Here,the effect of the Al O content in YSZ on the resistance of CMAS corrosion was investigated by means of differential scanning calorimetry（DSC）, X-ray diffraction（XRD） and wetting tests. The thermal properties of samples,the Young's modulus and fracture toughness of Al O-modified YSZ were studied by thermal conductivity and Vickers hardness test, respectively. The results demonstrate that when the Al O content is 40 mol%,the Al O-modified YSZ has the best properties to resist CMAS corrosion due to the formation of anorthite which has a high melt point. Furthermore, the phase diagram and phases mole fractions with different Al O content were calculated which match well with the experiments. With the increase of Al O modification content, the thermal conductivity, Young's modulus and fracture toughness of the sample increase.

关键词： Thermal barrier coatings CMAS Al2O3 modification

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Synthesis and characterization of Na0.44MnO2 nanorods/graphene composite as cathode materials for sodium-ion batteries

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Journal of Central South University 2019年第6期26卷 1510-1520页

作者： ZHANG Yue OUYANG Yan LIU Li XIA Jing NIE Su LIU Wen WANG Xian-you National Base for International Science & Technology Cooperation National Local Joint Engineering Laboratory for Key Materials of New Energy Storage BatteryHunan Province Key Laboratory of Electrochemical Energy Storage and ConversionKey Laboratory of Environmentally Friendly Chemistry and Application of Ministry of EducationCollege of ChemistryXiangtan UniversityXiangtan 411105China Key Laboratory of Advanced Energy Materials Chemistry of Ministry of Education Nankai UniversityTianjin 300071China

Na0.44MnO2 nanorods have been prepared by a hydrothermal *** experimental parameters have been systematically investigated and *** results show that Na0.44MnO2 nanorods obtained via the hydrothermal treatment at 200℃for 16 h show the best electrochemical properties,which deliver the high initial discharge capacity of 110.7 mA·h/g at 50 mA/g in potential window 2.0-4.0 *** further improve their electrochemical properties,a ball milling process with graphene has been carried out to obtain Na0.44MnO2/graphene *** initial discharge capacity of Na0.44MnO2/graphene composite is 106.9 mA·h/g at a current density of 50 mA/*** 100 cycles,the residual discharge capacity is 91.8 mA·h/g and the capacity retention rate is 85.9%,which is much higher than that of pristine Na0.44MnO2 nanorods(74.7%)at the same *** is more,when the current density reaches 500 and 1000 mA/g,the corresponding discharge capacities of Na0.44MnO2/graphene composite are about 89 and 78 mA·h/g,respectively,indicating outstanding rate capability.

关键词： manganese-based compounds hydrothermal method sodium-ion batteries composite materials

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Corrigendum to “Benzoxazine monomers containing triphenylimidazole: Polymerization of monomers and properties of polybenzoxazines” [Eur. Polym. J. 121 (2019) 109347–109354]

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European Polymer Journal 2020年 129卷

作者： Xufeng Li Yijiang Liu Hongbiao Chen Huaming Li College of Chemistry Key Laboratory of Environment-Friendly Chemistry and Application in Ministry of Education Key Laboratory of Polymeric Materials & Application Technology of Hunan Province and Key Laboratory of Advanced Functional Polymeric Materials of College of Hunan Province Xiangtan University Xiangtan 411105 Hunan Province PR China

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Systematics of the heavy flavor hadronic molecules

arXiv

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arXiv 2021年

作者： Chen, Kan Chen, Rui Meng, Lu Wang, Bo Zhu, Shi-Lin School of Physics and Center of High Energy Physics Peking University Beijing100871 China Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education Department of Physics and Synergetic Innovation Center for Quantum Effectsand Applications Hunan Normal University Changsha410081 China Institut für Theoretische Physik II Ruhr-Universität Bochum BochumD-44780 Germany School of Physical Science and Technology Hebei University Baoding071002 China Key Laboratory of High-precision Computation and Application of Quantum Field Theory of Hebei Province Baoding071002 China

With a quark level interaction, we give a unified description of the loosely bound molecular systems composed of the heavy flavor hadrons (D, ¯ D¯ ∗), (Λc, Σc, Σ∗c), and (Ξc, Ξ0c, Ξ∗c). Using the Pc states as inputs to fix the interaction strength of light quark-quark pairs, we reproduce the observed Pcs and Tcc+ states and predict another narrow Tcc0+ state with quantum numbers [D∗D∗]IJ=0=1. If we require a satisfactory description of the Tcc+ and Pc states simultaneously, our framework prefers the assignments of the Pc(4440) and Pc(4457) as the [ΣcD¯ ∗]JI=1=1//22 and [ΣcD¯ ∗]JI=1=3//22 states, respectively. We propose the isospin criterion to explain naturally why the experimentally observed Tcc, Pc, and Pcs molecular candidates prefer the lowest isospin numbers. We also predict the loosely bound states for the bottom di-hadrons. © 2021, CC BY.

关键词： Hadrons

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Recent Advances in Environmentally Friendly Dual-crosslinking Polymer Networks

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Angewandte Chemie 2024年第24期136卷

作者： Mingyue Zhang Woosung Choi Minju Kim Jinyoung Choi Xuerui Zang Yujing Ren Han Chen Vladimir Tsukruk Juan Peng Yijiang Liu Dong Ha Kim Zhiqun Lin Department of Chemical and Biomolecular Engineering National University of Singapore Singapore 117585 Singapore School of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332 USA Department of Chemistry and Nanoscience Ewha Womans University 52 Ewhayeodae-gil Seodaemun-gu Seoul 03760 Republic of Korea State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Science Fudan University Shanghai 200438 China College of Chemistry Key Lab of Environment-Friendly Chemistry and Application in Ministry of Education Xiangtan University Xiangtan Hunan Province 411105 China

Environmentally friendly crosslinked polymer networks feature degradable covalent or non-covalent bonds, with many of them manifesting dynamic characteristics. These attributes enable convenient degradation, facile reprocessibility, and self-healing capabilities. However, the inherent instability of these crosslinking bonds often compromises the mechanical properties of polymer networks, limiting their practical applications. In this context, environmentally friendly dual-crosslinking polymer networks (denoted EF-DCPNs) have emerged as promising alternatives to address this challenge. These materials effectively balance the need for high mechanical properties with the ability to degrade, recycle, and/or self-heal. Despite their promising potential, investigations into EF-DCPNs remain in their nascent stages, and several gaps and limitations persist. This Review provides a comprehensive overview of the synthesis, properties, and applications of recent progress in EF-DCPNs. Firstly, synthetic routes to a rich variety of EF-DCPNs possessing two distinct types of dynamic bonds (i.e., imine, disulfide, ester, hydrogen bond, coordination bond, and other bonds) are introduced. Subsequently, complex structure- and dynamic nature-dependent mechanical, thermal, and electrical properties of EF-DCPNs are discussed, followed by their exemplary applications in electronics and biotechnology. Finally, future research directions in this rapidly evolving field are outlined.

关键词： dual-crosslinking polymer network degradable recyclable self-healing

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Polarity induced electronic and atomic reconstruction at NdNiO2/SrTiO3 interfaces

arXiv

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arXiv 2020年

作者： He, Ri Jiang, Peiheng Lu, Yi Song, Yidao Chen, Mingxing Jin, Mingliang Shui, Lingling Zhong, Zhicheng School of Information and Optoelectronic Science and Engineering South China Normal University Guangzhou510006 China Key Laboratory of Magnetic Materials Devices & Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo315201 China Institute for Theoretical Physics University of Heidelberg Heidelberg69120 Germany School of Physics and Electronics Hunan Normal University Key Laboratory for Matter Microstructure and Function of Hunan Province Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education Changsha410081 China International Academy of Optoelectronics at Zhaoqing South China Normal University Zhaoqing526238 China China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing100049 China

Superconductivity has recently been observed in Sr-doped NdNiO2 films grown on SrTiO3. Whether it is caused by or related to the interface remains an open question. To address this issue, we use density functional theory calculation and charge transfer self-consistent model to study the effects of polar discontinuity on the electronic and atomic reconstruction at the NdNiO2/SrTiO3 interface. We find that sharp interface with pure electronic reconstruction only is energetically unfavorable, and atomic reconstruction is unavoidable. We further propose a possible interface configuration that contain residual apical oxygen. These oxygen atoms lead to hybrids of dz2 and dx2-y2 states at the Fermi level, which weaken the single-band feature and may be detrimental to superconductivity. Copyright © 2020, The Authors. All rights reserved.

关键词： Nickel compounds

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