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4th International Conference on Environmental and Energy Engineering, IC3E 2020

作者： Song, Ke School of Aeronautics Northwestern Polytechnical University 127 West Youyi Road Xi'an Shaanxi710072 China National Key Laboratory of Science and Technology on Aerodynamic Design and Research 127 West Youyi Road Xi'an Shaanxi710072 China

In this paper the aerodynamic and aeroacoustic characteristics of a wind turbine airfoil have been numerically investigated. The modified versions of TU Delft DU97-W-300 airfoil with a flatback trailing edge and a splitter plate were selected. IDDES method was introduced and provided good results compared with the experimental data with regard to the lift. Aeroacoustic analysis focused on the amplitude and frequency of noise associated with the vortex-shedding tone from the trailing edge wake. The results showed that wake flows were significantly effected by the addition of a splitter plate to the flatback trailing edge, and lead to reduction on both drag and noise. © Published under licence by IOP Publishing Ltd.

关键词： Wakes

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Thermal stress analysis of printed circuit heat exchanger based on thermal-structural coupling method

Thermal stress analysis of printed circuit heat exchanger ba...

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2019 International Conference on Boilers and Heat Exchangers, ICBHE 2019

作者： Wu, Jun Yao, Shuo Zhao, Zhenxing Xiao, Qi Ke, Zhiwu Lin, Yuansheng Science and Technology on Thermal Energy and Power Laboratory Wuhan Second Ship Design and Research Institute Hubei Province Wuhan430205 China School of Energy and Power Engineering Xi'An Jiaotong University Xi'an Shaanxi Province710049 China

The supercritical carbon dioxide (S-CO2) Brayton cycle has the advantages of high efficiency, compactness and simplicity. It is expected to become the main technical route for the future advanced ship nuclear power platform. The printed circuit heat exchanger (PCHE) with ultra-high pressure, ultra-compact and ultra-high efficiency typical characteristics is the ideal configuration of the S-CO2 power generation system recuperator. The PCHE numerical analysis model is constructed and the thermal stress field of the PCHE core structure is analyzed by thermal-structural coupling method. The results show that the maximum thermal stress of the PCHE core structure is 117 MPa, which is less than the yield limit of the material and meets the requirement of strength safety. The thermal stress value of most regions in PCHE is less than 78.2MPa. Therefore, the current design scheme has a large safety margin. The PCHE compactness can be further improved by structural parameter optimization. © Published under licence by IOP Publishing Ltd.

关键词： Structural optimization

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Effect of Background Magnetic Field on Quench Properties in Rebco and Bi-2223 Tapes

SSRN

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SSRN 2022年

作者： Qiu, T. Zhu, Y.P. Hu, X.B. Liu, Jian Cai, Lijun Xu, M. Zhang, S.N. Feng, J.Q. Tan, Yunfei Yang, Xinsheng Zhao, Y. CRSC Research & Design Institute Group Co. Ltd. Beijing100071 China Superconductivity and New Energy R&D Center Southwest Jiaotong University Chengdu610031 China Southwestern Institute of Physics Chengdu610041 China Northwest Institute for Nonferrous Metal Research Xi’an710016 China State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan430074 China

Quench propagation characteristics are very important for high temperature superconductor (HTS). In this paper, quench properties including the minimum quench energy (MQE) and the normal zone propagation velocity (NZPV) in different HTS tapes (REBCO and Bi-2223) under different value and position of background magnetic field were investigated. After applying a heat pulse to REBCO and Bi-2223 tapes, the electric field of each zone was measured to obtain the parameters characterizing MQE and NZPV. The experimental results show that the MQE and NZPV are different with different background magnetic field position for the same kind tape. At the position of heater, the magnetic field will also have an impact on the MQE. The equivalent heat capacity of the two tapes was calculated respectively. It was found that the equivalent heat capacity of Bi-2223 tape is larger than REBCO tape. According to formula derivation, the larger the equivalent heat capacity, the larger the MQE and the smaller NZPV. © 2022, The Authors. All rights reserved.

关键词： High temperature superconductors

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Liquid Metal Based Triboelectric Nanogenerator with Excellent Electrothermal and Safeguarding Performance Towards Intelligent Plaster

SSRN

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SSRN 2022年

作者： Gong, Liping Xuan, Tingting Wang, Sheng Du, Haiping Li, Weihua School of Mechanical Materials Mechatronic and Biomedical Engineering University of Wollongong Wollongong2522 Australia CAS Key Laboratory of Mechanical Behavior and Design of Materials Department of Modern Mechanics University of Science and Technology of China Anhui Hefei230027 China School of Electrical Computer and Telecommunication Engineering University of Wollongong Wollongong2522 Australia

Polymer-based self-powered wearable sensing devices are easily destroyed under harsh mechanical shocks which largely restricts the development of smart electronic device. Herein, a versatile liquid metal based triboelectric nanogenerator (LM-TENG) device was developed by integrating the shear stiffening elastomer (SSE) with liquid metal (LM) and electrothermal aluminum foil. Based on the electrostatic induction effect, LM-TENG showed the good capacity of harvesting energy. The output voltage and power of the LM-TENG reached to 22.29 V and 55.16 µW with 9 MΩ load resistance at the force and frequency of 40 N and 15 Hz. Besides, LM-TENG demonstrated excellent electrothermal performance by efficiently reaching 69.02 °C with the applied voltage of 1.5 V. Additionally, LM-TENG displayed safeguarding performance under quasi-static and dynamic damage by effectively decreasing the impact force from 2.86 to 0.72 kN, endowing the device with excellent anti-impact from sharp objects penetration loading. Moreover, the utility of LM-TENG as intelligent medical plaster with joule-heating, controllable stiffness, self-powering sensing and anti-impact performance was further studied, providing a new strategy for designing multifunctional sensor, and paving the way for intelligent wearable electronics, personal healthcare and safeguards in the future. © 2022, The Authors. All rights reserved.

关键词： Nanogenerators

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Lipidomics and metabolomics reveal the enhanced mutton quality of Tan sheep under a standardized feeding regimen

Agriculture Communications

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Agriculture Communications 2023年第2期1卷

作者： Wang, Kewen Wang, Xue Tan, Jia Zhang, Nan Chen, Ailiang Feng, Zhonghua Qian, Yongzhong Xu, Zhenzhen Institute of Quality Standard & Testing Technology for Agro-Products Key Laboratory of Agro-Food Safety and Quality Ministry of Agriculture and Rural Affairs Chinese Academy of Agricultural Sciences Beijing 100081 China College of Food Science and Nutritional Engineering China Agricultural University Beijing 100083 China Ning Xia Agricultural Institute of Survey & Design Yinchuan 750001 China

One of the main factors affecting meat quality is the feeding regimen, which impacts muscle growth, fat accumulation, and fatty acid composition. This study characterized the lipid and metabolite profiles in Tan lamb using lipidomics and metabolomics to investigate the influence of standardized feeding and conventional grazing regimens on meat quality. We identified 813 lipids across five categories and 86 metabolites, including peptides, amino acids, carnitines, and nucleosides in Tan lamb. The standardized feeding regimen yielded fewer saturated fatty acids (SFAs), an increased n-6 polyunsaturated fatty acid (PUFA) content, and a higher PUFA/SFA ratio than the conventional grazing regimen. In addition, this regimen elevated the levels of bioactive peptides, vitamin B2 cofactors, and nucleosides. Analysis of purine metabolism and aminoacyl-tRNA biosynthesis revealed improved flavor and increased protein synthesis under the standardized feeding regimen. Therefore, the standardized feeding regimen enhances nutritional value and improves lamb flavor, making it suitable for Tan sheep feeding. © 2023 The Author(s)

关键词： Conventional grazing regimen Lipidomics Metabolomics Standardized feeding regimen Tan sheep

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SARS-CoV-2:structure,host,virus source and pathogenesis

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Asian Journal of Traditional Medicines 2021年第1期16卷 32-52页

作者： Mingxue Li Yueying Yang Yang Liu Mengzhu Zheng Dejuan Sun Hua Li Lixia Chen Wuya College of Innovation Key Laboratory of Structure-Based Drug Design&DiscoveryMinistry of EducationShenyang Pharmaceutical UniversityShenyang 110016China Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation School of PharmacyTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China

Cancer is a serious threat to human life and a big problem in clinical *** natural active substances extracted from Traditional Chinese Medicine can effectively inhibit the growth of cancer cells,which is a new direction for finding more effective anticancer *** is a natural coumarin compound extracted from Traditional Chinese Medicines such as Cnidium monnieri,Angelica pubescens and Peucedanum praeruptorum *** has significant inhibitory activity against a variety of *** paper summarizes the anticancer effects and molecular mechanisms of osthole in the treatment of cancers in recent years in order to provide references for further research.

关键词： osthole anticancer effects molecular mechanisms

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Construction Of 1d/2d Core-Shell Structured K6nb10.8o30@Zn2in2s5 As S-Scheme Photocatalysts for Cocatalyst-Free Hydrogen Production

SSRN

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SSRN 2022年

作者： Wang, Jing Pan, Runhui Yan, Shiye Wang, Rui Niu, Xingyu Hao, Qi Ye, Jilei Wu, Yuping Ying Yang, Hui State Key Laboratory of Materials-oriented Chemical Engineering School of Energy Science and Engineering Nanjing Tech University Jiangsu Nanjing211816 China School of Energy and Environment South East University Jiangsu Nanjing211189 China Pillar of Engineering Product Development Singapore University of Technology and Design Singapore487372 Singapore

Constructing heterostructures is an effective strategy to achieve efficient photocatalysis. The determination of the heterojunction types depends on the photo-induced charge carrier transfer path. Therefore, understanding the charge carrier transfer mechanism of heterojunctions plays an irreplaceable role in guiding the construction of rational heterojunctions. However, it is challenging due to the microscopic nature of charge carrier transfer. Herein, an S-scheme K6Nb10.8O30@Zn2In2S5 (KNbO@ZIS) heterojunction with 1D/2D core-shell structure is designed for improving photocatalytic hydrogen production. KNbO@ZIS exhibits a greatly improved cocatalyst-free hydrogen generation activity (12.35 mmol h-1 g-1) compared to K6Nb10.8O30 (KNbO) and Zn2In2S5 (ZIS) under UV-visible illumination. The improvement of photocatalytic performance is mainly attributed to the suppressed recombination of photogenerated charge carriers by the S-scheme heterojunction. The 1D/2D core-shell structure further accelerates the charge carrier transfer in the photocatalysts. S-scheme heterojunction mechanism is also demonstrated by ex/in situ irradiated X-ray photoelectron spectroscopy and Kelvin probe force microscopy measurements as well as work function calculations. This work provides a powerful strategy for designing novel heterojunction composites. © 2022, The Authors. All rights reserved.

关键词： X ray photoelectron spectroscopy

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Thermally tunable microfiber knot resonator with flexible graphene heater

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Chinese Optics Letters 2021年第5期19卷 37-42页

作者： Yunzheng Wang Qing Wu Huide Wang Jiefeng Liu Zheng Zheng Meng Zhang Han Zhang International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education Institute of Microscale OptoelectronicsShenzhen UniversityShenzhen 518060China Singapore University of Technology and Design Singapore 487372Singapore School of Electronic and Information Engineering Beihang UniversityBeijing 100191China Beijing Advanced Innovation Center for Big Data-Based Precision Medicine Beihang UniversityBeijing 100083China

Efficiently tuning the output intensity of an optical device is of vital importance for the establishment of optical interconnects and ***-optical modulation is an easily implemented and convenient approach and has been widely employed in photonic *** this paper,we proposed a novel thermo-optical modulator based on a microfiber knot resonator(MKR)and graphene *** applying voltage to graphene,the resonant property of the MKR could be thermally tuned with a maximum phase shift of 2.1π.Intensity modulation shows a fast optical response time thanks to the high thermal conductivity of graphene and the thin microfiber diameter of the MKR.

关键词： microfiber knot resonator graphene heater thermo-optical modulation

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Large Bilinear Magnetoresistance from Rashba Spin-Splitting on the Surface of a Topological Insulator

arXiv

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arXiv 2022年

作者： Wang, Yang Liu, Binbin Huang, Yue-Xin Mambakkam, Sivakumar V. Wang, Yong Yang, Shengyuan A. Sheng, Xian-Lei Law, Stephanie A. Xiao, John Q. Department of Physics and Astronomy University of Delaware NewarkDE19716 United States School of Physics Beihang University Beijing100191 China Research Laboratory for Quantum Materials Singapore University of Technology and Design Singapore487372 Singapore Department of Materials Science and Engineering University of Delaware NewarkDE19716 United States

In addition to the topologically protected linear dispersion, a band-bending-confined two-dimensional electron gas with tunable Rashba spin-splitting (RSS) was found to coexist with the topological surface states on the surface of topological insulators (TIs). Here, we report the observation of large bilinear magnetoresistance (BMR) in Bi2Se3 films decorated with transition metal atoms. The magnitude of the BMR sensitively depends on the type and amount of atoms deposited, with a maximum achieved value close to those of strong Rashba semiconductors. Our first-principles calculations reproduce the quantum well states and reveal sizable RSS in all Bi2Se3 heterostructures with broken inversion symmetry. Our results show that charge-spin interconversion through RSS states in TIs can be fine-tuned through surface atom deposition and easily detected via BMR for potential spintronic applications. © 2022, CC BY.

关键词： Atoms

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Current nuclear data needs for applications

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Physical Review Research 2022年第2期4卷 021001-021001页

作者： Karolina Kolos Vladimir Sobes Ramona Vogt Catherine E. Romano Michael S. Smith Lee A. Bernstein David A. Brown Mary T. Burkey Yaron Danon Mohamed A. Elsawi Bethany L. Goldblum Lawrence H. Heilbronn Susan L. Hogle Jesson Hutchinson Ben Loer Elizabeth A. McCutchan Matthew R. Mumpower Ellen M. O'Brien Catherine Percher Patrick N. Peplowski Jennifer J. Ressler Nicolas Schunck Nicholas W. Thompson Andrew S. Voyles William Wieselquist Michael Zerkle Nuclear and Chemical Sciences Division Lawrence Livermore National Laboratory Livermore California 94550 USA Department of Nuclear Engineering University of Tennessee Knoxville Tennessee 37996 USA Department of Physics and Astronomy University of California Davis California 95516 USA IB3 Global Solutions Oak Ridge Tennessee 37830 USA Physics Division Oak Ridge National Laboratory Oak Ridge Tennessee 37831 USA University of California Department of Nuclear Engineering Berkeley California 94720 USA Nuclear Science Division Lawrence Berkeley National Laboratory Berkeley California 94720 USA National Nuclear Data Center Brookhaven National Laboratory Upton New York 11973 USA Design Physics Division Lawrence Livermore National Laboratory Livermore California 94550 USA Rensselaer Polytechnic Institute Department of Mechanical Aerospace and Nuclear Engineering 110 8th Street Troy New York 12180 USA Signature Science and Technology Division Pacific Northwest National Laboratory Richland Washington 99352 USA Xe-Mobile Division X-Energy LLC Rockville Maryland 20852 USA Radioisotope Science and Technology Division Oak Ridge National Laboratory Oak Ridge Tennessee 37831 USA NEN-2 Advanced Nuclear Technology Los Alamos National Laboratory Los Alamos New Mexico 87545 USA Theoretical Division Los Alamos National Laboratory Los Alamos New Mexico 87545 USA Chemistry Division Los Alamos National Laboratory Los Alamos New Mexico 87545 USA Nuclear Criticality Safety Division Lawrence Livermore National Laboratory Livermore California 94550 USA Johns Hopkins University Applied Physics Laboratory Laurel Maryland 20723 USA Nuclear Energy and Fuel Cycle Division Oak Ridge National Laboratory Oak Ridge Tennessee 37831 USA Reactor Technology Department Naval Nuclear Laboratory West Mifflin Pennsylvania 15122 USA

Accurate nuclear data provide an essential foundation for advances in a wide range of fields, including nuclear energy, nuclear safety and security, safeguards, nuclear medicine, and planetary and space exploration. In these and other critical domains, outdated, imprecise, and incomplete nuclear data can hinder progress, limit precision, and compromise safety. Similar nuclear data needs are shared by many applications, thus prioritizing these needs is especially important and urgently needed. Many levels of analysis are required to prepare nuclear measurements for employment in end-user applications. Because research expertise is typically limited to one level, collaboration across organizations and international borders is essential. This perspective piece provides the latest advances in nuclear data for applications and describes an outlook for both near- and long-term progress in the field.

关键词： Nuclear engineering Nuclear reactors Quantum computation Monte Carlo methods Nuclear data analysis & compilation

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