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27th International Conference on Nuclear Engineering: Nuclear Power Saves the World!, ICONE 2019

作者： Wang, Dongqing Zhang, Xiaoying Ma, Quan Wang, Chunyu Wang, Long Ma, Jun Sino-French Institute of Nuclear Engineering and Technology Sun Yet-Sen University Zhuhai Guangdong China State Key Laboratory of Reactor System Design Technology Nuclear Power Institute of China Chengdu Sichuan China China Nuclear Power Technology Research Institute Shenzhen Guangdong China Sino-French Inst. of Nuclear Engineering and Technology Sun Yet-Sen University Zhuhai Guangdong China

ISBN: (纸本)9784888983051

In this paper, the driving power conversion rate of a two-phase natural circulation loop is analyzed numerically. In operation of the two-phase natural circulation loop, part of thermal energy is converted into driving power, that is, the gravity difference between steam and water in vertical loops. The power drives circulation flow in this loop and it is converted into kinetic energy of the fluid, which is partially dissipated eventually with flow resistance. In steady state, the conversion rate is equal to the dissipation rate. In this study, modeling and simulation of a general two-phase natural circulation loop are performed. The dissipation rate of kinetic energy with flow resistance is calculated, which is equal to the driving power conversion rate in value. Furthermore, the conversion rate from thermal energy to the power is obtained with the conversion rate calculated indirectly and heat transfer rate of the heat source. Simulation results indicate that the conversion rate can be as low as 0.01%. Based on this result, design improvement of the natural circulation loop is proposed. In this design, the thermoelectric material Bi2Te3 is attached outside part of the heat exchanger tubes. With the material, the temperature difference between fluid inside and outside the heat exchanger leads to voltage, and the heat exchanger with the material actually works as a thermoelectric generator (TEG). In this way, part of thermal energy is converted into electricity with an efficiency which is much greater than that of original two-phase natural circulation loop. The electricity converted is further used to enhance circulation flow of water through a pump and natural convection outside the heat exchanger with a group of agitators. With this design, the driving power conversion rate of the two-phase natural circulation loop is increased, the driving force is enhanced, circulation flow and heat transfer can be improved. Copyright © 2018-2019 by JSME

关键词： Thermal energy

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Generation of Chicken-Induced Pluripotent Stem Cells from Somatic Cells Using Multi-Lentiviral Transduction and Oac2

SSRN

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SSRN 2025年

作者： Liu, Guangzheng Zhu, Xilin Li, Zeyu Zhu, Liqian Chen, Guohong Niu, Yingjie Sun, Hongyan Zuo, Qisheng Song, Jiuzhou Han, Wei Wei, Wanhong Li, Bichun Jin, Kai Joint International Research Laboratory of Agriculture and Agri-Product Safety of Ministry of Education of China Yangzhou University Yangzhou225009 China Key Laboratory of Animal Breeding Reproduction and Molecular Design for Jiangsu Province College of Animal Science and Technology Yangzhou University Yangzhou225009 China Institutes of Agricultural Science and Technology Development Yangzhou University Yangzhou225009 China Department of Animal & Avian Sciences University of Maryland College ParkMD United States Jiangsu Institute of Poultry Sciences/ Poultry institute Chinese Academy of Agricultural Sciences Yangzhou225003 China College of Bioscience and Biotechnology Yangzhou University Yangzhou225009 China College of Biotechnology Jiangsu University of Science and Technology Zhenjiang212100 China

The chicken-induced pluripotent stem cells (iPSCs) have been successfully established and exhibit significant potential for the recovery and conservation of endangered avian species. However, the efficiency of induction remains quite limited. To enhance the induction system, a six-factor reprogramming approach incorporating OCT4, SOX2, NANOG, LIN28, KLF4, and C-MYC (OSNLKM) was employed via lentiviral infection, in combination with the small-molecule compound OAC2 and mouse embryonic fibroblast (MEF) feeder layers. The results demonstrated that the six-factor system significantly accelerated the reprogramming process and improved induction efficiency compared to the conventional four-factor system (OCT4, SOX2, NANOG, and LIN28;OSNL). Additionally, the MEF feeder layers were found to be essential for the successful reprogramming of chicken somatic cells. The inclusion of OAC2 further optimized the reprogramming conditions, enabling the successful induction of iPSCs from chicken embryonic fibroblasts (CEFs) and testicular Sertoli cells. Collectively, this study establishes an optimized reprogramming system for chicken somatic cells, enhancing iPSC induction efficiency and expanding the potential applications of iPSC technology in avian conservation and genetic modification. © 2025, The Authors. All rights reserved.

关键词： Animal cell culture

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The role of β pockets resulting from Fe impurities in hydride formation in titanium

arXiv

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arXiv 2022年

作者： Tan, Qing Yan, Zhiran Wang, Huijun Dye, David Antonov, Stoichko Gault, Baptiste Department of Microstructure Physics and Alloy Design Max-Planck-Institut für Eisenforschung GmbH Max-Planck-Straße 1 Düsseldorf40237 Germany Department of Materials Royal School of Mines Imperial College Prince Consort Road LondonSW7 2BP United Kingdom State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing Beijing100083 China

The corrosion potential of commercially pure titanium in NaCl solutions is dramatically affected by trace Fe additions, which cause the appearance of submicron pockets of β phase at grain boundary triple points. Furthermore, the low solubility of hydrogen in hexagonal close-packed α-Ti makes titanium alloys prone to subsequent hydride-associated failures due to stress corrosion cracking. We analyzed α-α and α-β sections of the abutting grain boundary of a β pocket in a Grade 2 CP-Ti, and the α-β phase boundary. Fe and H partition to β and segregate at the grain boundary, but no segregation is seen at the α-β phase boundary. In contrast, a significant Ni (>1 at%) accumulation is observed at the α-β phase boundary. We propose that the β-pockets act as hydrogen traps and facilitate the nucleation and growth of hydrides along grain boundaries in CP-Ti. Copyright © 2022, The Authors. All rights reserved.

关键词： Grain boundaries

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Optimizing Remediation Decisions Based on Soil Volumes and Transport Distances Reduces the Environmental Impacts of Contaminated Land Remediation

SSRN

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SSRN 2022年

作者： Liang, Tian Huo, Mingchao Yu, Lu Wang, Panpan Zheng, Jia Zhang, Chi Wang, Dong Ding, Aizhong Li, Fasheng College of Water Science Beijing Normal University Beijing100875 China State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental Sciences Beijing100012 China Institute of Circular Economy Beijing University of Technology Beijing100124 China Chongqing Solid Waste Management Center Chongqing401147 China Eco-Environmental Sciences Research & Design Institute of Zhejiang Province Zhejiang310007 China

With increasing need for sustainable remediation, using thermal remediation techniques as frequently applied strategies for soil remediation has aroused widespread concern. However, such methods are accompanied by high energy consumption, and unreasonable remediation decisions, and exacerbate their environmental impacts. In this study, we conducted an integrated life cycle assessment to evaluate the environmental impacts associated with remediating organically contaminated land. By comparing three remediation scenarios for urban contaminated land in Jiangsu Province, China, we found that the secondary impacts were, in descending order: cement kiln co-processing > offsite ex-situ thermal desorption > onsite ex-situ thermal desorption. When tertiary impacts were considered, cement kiln co-processing yielded much lower environmental impacts than the other scenarios owing to its ability to substitute raw materials. The results demonstrate that the optimized decisions reduce the estimated environmental impacts by 61.1%. This study provides new findings to support sustainable rehabilitation of urban industrially contaminated sites. © 2022, The Authors. All rights reserved.

关键词： Decision making

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Experimental determination and thermodynamic optimization of Co-Al-V ternary system

引用

Calphad 2025年 89卷

作者： Xinming Wang Ying Ran Zheng Peng Guangjing Liao Siqi Wang Xuemei Ouyang Yan Liu Min Zhou Fucheng Yin Jingxian Hu School of Materials Science and Engineering Xiangtan University Xiangtan Hunan 411105 PR China Key Laboratory of Materials Design and Preparation Technology of Hunan Province Xiangtan University Xiangtan Hunan 411105 PR China Jianglu Machinery Electronics Group Co. Ltd Xiangtan 411100 PR China

Novel Co-based superalloys, which possess superior high-temperature performance and oxidation resistance, have been extensively employed in high-temperature applications. Studying the phase relationships of Co-based alloys is crucial for their practical applications. The phase relationships in the isothermal section of the Co-Al-V ternary system at 1373 K (1100 °C) were experimentally determined by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD). Nine three-phase regions were experimentally confirmed. On the basis of the previous data and the present experimental results, thermodynamic optimization of the Co-Al-V ternary system was conducted via the CALPHAD method. The calculated results are in good agreement with the experimental results, and a set of reasonable and self-consistent thermodynamic parameters has been obtained. These results provide a basis for the design of Co-based alloys and enrich the database of Co-based alloys.

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Rydberg electromagnetically induced transparency and absorption of strontium triplet states in a weak microwave field

arXiv

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arXiv 2022年

作者： Zhou, Yan-Li Yan, Dong Li, Weibin Department of Physics College of Liberal Arts and Sciences Interdisciplinary Center for Quantum Information National University of Defense Technology Changsha410073 China School of Science Key Laboratory of Materials Design and Quantum Simulation Changchun University Changchun130022 China School of Physics and Astronomy Centre for the Mathematics and Theoretical Physics of Quantum Non-Equilibrium Systems University of Nottingham NottinghamNG7 2RD United Kingdom

We study theoretically laser excitation of Rydberg triplet states of strontium atoms in the presence of weak microwave (MW) fields. Starting from the ground state 5s2 1S0, the Rydberg excitation is realized through the metastable, triplet 5s5p 3P1 state, whose decay rate γ2 is 2π × 7.5 kHz, much smaller than the one in the singlet state or alkali atoms. The influences of γ2 on the transparency and absorption spectrum in the electromagnetically induced transparency (EIT), and electromagnetically induced absorption (EIA) regime are examined. Narrow transparent windows (EIT) or absorption peaks (EIA) are found, whose distance in the spectrum depends on the Rabi frequency of the weak MW field. It is found that the spectrum exhibits higher contrast than using the singlet state or alkali atoms in typical situations. Using the metastable intermediate state, we find that resonance fluorescence of Sr gases exhibits very narrow peaks, which are modulated by the MW field. When the MW field is weaker than the probe and control light, the spectrum distance of these peaks are linearly proportional to Ωm. This allows us to propose a new way to sense very weak MW fields through resonance fluorescence. Our study shows that the Sr triplet state could be used to develop the Rydberg MW electrometry that gains unique advantages. Copyright © 2022, The Authors. All rights reserved.

关键词： Laser excitation

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A Method for Obtaining Contact Force between Catheter Tip and Vascular Wall in Master-slave Robotic System

A Method for Obtaining Contact Force between Catheter Tip an...

引用

IEEE International Conference on Mechatronics and Automation

作者： Xiaoliang Jin Shuxiang Guo Jian Guo Peng Shi Dapeng Song Faculty of Engineering and Design Kagawa University 2217-20 Hayashi-cho Takamatsu Kagawa Japan Key Laboratory of Convergence Medical Engineering System and Healthcare Technology the Ministry of Industry and Information Technology School of Life Science Beijing Institute of Technology Beijing China Tianjin Key Laboratory for Control Theory and Application in Complicated Systems and Intelligent Robot Laboratory Tianjin University of Technology Tianjin China

ISBN: (数字)9781728164168

ISBN: (纸本)9781728164175

In the research of vascular interventional surgery robotic system, the force information acquisition of surgical tools (guidewires and catheters) has a significant affect on the safety of surgery, especially the contact force between the catheter tip and vascular wall. Therefore. In order to obtain this contact force, we noticed the pressure sensitive rubber because of its piezoresistive effect and easy processing into any shape. a force sensor based on the pressure sensitive rubber was developed in this paper. Once a force is applied on the force sensor attached to the catheter tip, the contact force can be approximated by the piezoresistive effect of the pressure sensitive rubber. The feasibility of the developed force sensor was verified by the experiments in “Vitro”. And the results showed that the force sensor was developed in this paper can accurately detect the contact force between the catheter tip and vascular wall at different positions in the vascular model, the extraction of contact force information of catheter tip is of great significance to the safety of surgery, and the application potential of pressure sensitive rubber.

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How Do Plants Boost Pyrite-Driven Nitrogen Removal in Constructed Wetlands?

SSRN

引用

SSRN 2022年

作者： Shen, Cheng Su, Liti Zhao, Yaqian Liu, Wenbo Liu, Ranbin Zhang, Fuhao Shi, Yun Wang, Jie Tang, Qiuqi Yang, Yan Man, Yu Bon Zhang, Jin School of Environment and Natural Resources Zhejiang University of Science & Technoogyl Zhejiang Hangzhou310000 China Sino-Dutch R&D Centre for Future Wastewater Treatment Technologies Beijing Advanced Innovation Center of Future Urban Design Beijing University of Civil Engineering & Architecture Beijing100044 China Dooge Centre for Water Resources Research School of Civil Engineering University College Dublin Belfield Dublin 4 Ireland State Key Laboratory of Eco-Hydraulics in Northwest Arid Region Xi’an University of Technology Xi’an710048 China Department of Science and Environmental Studies The Education University of Hong Kong 10 Lo Ping Road Tai Po Hong Kong Zhejiang University of Science and Technology China University College Dublin Ireland

Pyrite-driven autotrophic denitrification (PAD) is attractive for nitrogen removal from organic-deficient wastewater. However, the low denitrification rate is one major limitation of PAD. Among the engineered applications of PAD, the PAD-integrated CW performed excellently in both nitrogen and phosphorus removal. As plants were the key difference between CWs and other engineered systems, we suppose that plants play a significant role in PAD. Thus, the role of plants in nitrogen removal, pyrite dissolution, and microbial community has been identified. The results show that plants enhanced the TN removal significantly (from 41.6±3.9% to 97.1±2.6%). Plants can accelerate the PAD in CW through the strengthening of pyrite dissolution. Enriched functional (Thiobacillus and Acidiferrobacter) and close interaction among microbes related to the iron, nitrogen, and sulfur cycles has been found in CW with plants. This study identified the role of plants in PAD acceleration, providing an in-depth understanding of pyrite in CW systems. © 2022, The Authors. All rights reserved.

关键词： Denitrification

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Observation of nonlinear planar Hall effect in magnetic insulator/topological insulator heterostructures

arXiv

引用

arXiv 2022年

作者： Wang, Yang Mambakkam, Sivakumar V. Huang, Yue-Xin Wang, Yong Ji, Yi Xiao, Cong Yang, Shengyuan A. Law, Stephanie A. Xiao, John Q. Department of Physics and Astronomy University of Delaware NewarkDE19716 United States Department of Materials Science and Engineering University of Delaware NewarkDE19716 United States Research Laboratory for Quantum Materials Singapore University of Technology and Design Singapore487372 Singapore Department of Physics The University of Hong Kong Hong Kong Hong Kong HKU-UCAS Joint Institute of Theoretical and Computational Physics Hong Kong Hong Kong

Interfacing topological insulators (TIs) with magnetic insulators (MIs) has been widely used to study the interaction between topological surface states and magnetism. Previous transport studies typically interpret the suppression of weak antilocalization or appearance of the anomalous Hall effect as signatures of magnetic proximity effect (MPE) imposed to TIs. Here, we report the observation of nonlinear planar Hall effect (NPHE) in Bi2Se3 films grown on MI thulium and yttrium iron garnet (TmIG and YIG) substrates, which is an order of magnitude larger than that in Bi2Se3 grown on nonmagnetic gadolinium gallium garnet (GGG) substrate. The nonlinear Hall resistance in TmIG/Bi2Se3 depends linearly on the external magnetic field, while that in YIG/Bi2Se3 exhibits an extra hysteresis loop around zero field. The magnitude of the NPHE is found to scale inversely with carrier density. We speculate the observed NPHE is related to the MPE-induced exchange gap opening and out-of-plane spin textures in the TI surface states, which may be used as an alternative transport signature of the MPE in MI/TI heterostructures. © 2022, CC BY.

关键词： Bismuth compounds

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Port Reconfigurable Phase-Change Optical Resonator

arXiv

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arXiv 2022年

作者： Meng, Haiyu Wang, Lingling Liu, Ziran Chen, Jianghua Lee, Ching Hua Ang, Yee Sin Department of Physics National University of Singapore 117542 Singapore Singapore University of Technology and Design 497372 Singapore Center for High-Resolution Electron Microscopy College of Materials Science and Engineering Hunan University Changsha410082 China School of Physics and Electronics Hunan University Changsha410082 China Department of Physics Key Laboratory for Low-Dimensional Structures and Quantum Manipulation Ministry of Education Hunan Normal University Changsha410081 China

Active control and manipulation of electromagnetic waves are highly desirable for advanced photonic device technology, such as optical cloaking, active camouflage and information processing. designing optical resonators with high ease-of-control and reconfigurability remains a open challenge thus far. Here we propose a novel mechanism to continuously reconfigure an optical resonator between one-port and two-port configurations via phase-change material for efficient optical modulation. By incorporating a phase-change material VO2 substrate into a photonic crystal optical resonator, we computationally show that the system behaves as a one-port device with near-perfect absorption and two-port device with high transmission up to 92% when VO2 is in the metallic rutile phase and insulating monoclinic phase, respectively. The optical response can be continuously and reversibly modulated between various intermediate states. More importantly, the proposed device is compatible with wide-angle operation and is robust against structural distortion. Our findings reveal a novel device architecture of port reconfigurable optical resonator uniquely enabled by switchable optical properties of phase change material. Copyright © 2022, The Authors. All rights reserved.

关键词： Vanadium dioxide

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