检索结果-内蒙古大学图书馆

SSRN 2023年

作者： Xu, Yongliang Wang, Lanyun Zhang, Kun College of Safety Science and Engineering Henan Polytechnic University 2001 Century Avenue Henan CN Jiaozuo454000 China State Key Laboratory Cultivation Base for Gas Geology and Gas Control in Henan Polytechnic University 2001 Century Avenue Henan Jiaozuo454000 China Department of System Safety Engineering Nagaoka University of Technology 1603-1 Kamitomioka-machi Nagaoka-shi Niigata940-2188 Japan

Three kinds of porous metal foam, alumnium foam(AF), ion foam(IF) and copper foam(CF), were immersed into the aqueous phase to increase the equilibrium temperature, accelerate the CH4 hydrates nucleation, reduce the induction time and enhance gas consumption, which exhibit an excellent thermodynamic-kinetic dual promotion ability. CF was verified to be an optimal porous medium for CH4 hydrates due to its equilibrium temperature of 279.26 K with an induction time of 66 min under around 5.0 MPa. In order to enhance CH4 consumption, 0.3 wt% leucine was added as the kinetic promoter, achieving a CH4 consumption to be around 0.15 mole of CH4 per mole of water, nearly 3~4 times more than the case of pure water and those without leucine. © 2023, The Authors. All rights reserved.

关键词： Hydration

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Preparation of Different Lights Irradiated ZnSe/GSH QDs and Their Interaction with BSA

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Journal of Wuhan University of technology(Materials Science) 2019年第4期34卷 858-865页

作者： DING Ling LI Shiqian The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and Technology Wuhan 430081China Coal Conversion and New Carbon Materials Hubei Key Laboratory School of Chnemistry and Chemical EngineeringWuhan University of Science and TechnologyWuhan 430081China Key Laboratory of Measurement and Control System for Offshore Environment Fuqing Branch of Fujian Normal UniversityFuqing 350300China

Using L-glutathione(GSH) as a capping agent,Zn Se/GSH quantum dots(QDs) were prepared under microwave irradiation and irradiated under dark, ultraviolet light and incandescent light, respectively. The properties and interaction of different lights irradiated ZnSe/GSH QDs and bovine serum albumin(BSA) were studied systematically. The fluorescence(FL) spectra results reveal that the quenching mechanism are all the static quenching in nature. The quenching constant(Ksv) and binding constant(K) value of different irradiated Zn Se/GSH QDs and BSA all increased with the change of light types from dark to incandescent light and UV light. The number of binding site(n) is close to 1 at different temperatures. The lighting types influence the enthalpy and entropy changes. The Fourier transform infrared(FTIR) spectra indicate that the light induced GSH ligand will facilitate photocatalytic oxidation on the surface of ZnSe/GSH QDs. The circular dichroism(CD)results show that the α-helicity content of BSA decreases from 60.34%, 59.31%, to 58.79% under UV lighting,incandescent lighting and dark conditions. The interaction results of different lights illuminated ZnSe/GSH QDs with BSA by CD spectra method matches well with that by FL and FTIR spectra. That is, the interaction of ZnSe/GSH QDs and BSA from strong to weak is UV light, incandescent light and dark in sequence.

关键词： lights irradiated ZnSe/GSH quantum dots preparation bovine serum albumin interaction thermodynamics

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Superconductivity in pressurized trilayer La4Ni3O10-δ single crystals

arXiv

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arXiv 2023年

作者： Zhu, Yinghao Peng, Di Zhang, Enkang Pan, Bingying Chen, Xu Chen, Lixing Ren, Huifen Liu, Feiyang Hao, Yiqing Li, Nana Xing, Zhenfang Lan, Fujun Han, Jiyuan Wang, Junjie Jia, Donghan Wo, Hongliang Gu, Yiqing Gu, Yimeng Ji, Li Wang, Wenbin Gou, Huiyang Shen, Yao Ying, Tianping Chen, Xiaolong Yang, Wenge Cao, Huibo Zheng, Changlin Zeng, Qiaoshi Guo, Jiangang Zhao, Jun State Key Laboratory of Surface Physics Department of Physics Fudan University Shanghai200433 China Shanghai Research Center for Quantum Sciences Shanghai201315 China Shanghai201203 China College of Physics and Optoelectronic Engineering Ocean University of China Shandong Qingdao266100 China Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing100190 China Neutron Scattering Division Oak Ridge National Laboratory Oak RidgeTN37831 United States Center for High Pressure Science and Technology Advanced Research Shanghai201203 China School of Physical Sciences University of Chinese Academy of Sciences Beijing100049 China Center for High Pressure Science and Technology Advanced Research Beijing100094 China State Key Laboratory of ASIC and System School of Microelectronics Fudan University Shanghai China Institute of Nanoelectronics and Quantum Computing Fudan University Shanghai200433 China Shanghai Branch Hefei National Laboratory Shanghai201315 China

The pursuit of discovering new high-temperature superconductors that diverge from the copper-based paradigm1-3 carries profound implications for elucidating mechanisms behind superconductivity and may also enable new applications4-8. Here, our investigation reveals that application of pressure effectively suppresses the spin and charge order in trilayer nickelate La4Ni3O10-δ single crystals, leading to the emergence of superconductivity with a maximum critical temperature (Tc) of around 30 K at 69.0 GPa. The DC susceptibility measurements confirm a substantial diamagnetic response below Tc, indicating the presence of bulk superconductivity with a volume fraction exceeding 80%. In the normal state, we observe a "strange metal" behavior, characterized by a linear temperature-dependent resistance extending up to 300 K. Furthermore, the layer-dependent superconductivity observed hints at a unique interlayer coupling mechanism specific to nickelates, setting them apart from cuprates in this regard. Our findings provide crucial insights into the fundamental mechanisms underpinning superconductivity, while also introducing a new material platform to explore the intricate interplay between the spin/charge order, flat band structures, interlayer coupling, strange metal behavior and high-temperature superconductivity. © 2023, CC BY-NC-ND.

关键词： Single crystals

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Robust pre-departure scheduling for a nation-wide air traffic flow management

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Chinese Journal of Aeronautics 2025年第4期 488-504页

作者： Jianzhong YAN Haoran HU Yanjun WANG Xiaozhen MA Minghua HU Daniel DELAHAYE Sameer ALAM College of Civil Aviation Nanjing University of Aeronautics and Astronautics Operations Management Center Air Traffic Management Bureau of CAAC State Key Laboratory of Air Traffic Management System SIPSG Information Technology Co. Ltd. ENAC Research Lab Ecole Nationale de l’Aviation Civile Air Traffic Management Research Institute Nanyang Technological University

Air traffic flow management has been a major means for balancing air traffic demandand airport or airspace capacity to reduce congestion and flight delays. However, unpredictable fac-tors, such as weather and equipment malfunctions, can cause dynamic changes in airport and sectorcapacity, resulting in significant alterations to optimized flight schedules and the calculated pre-departure slots. Therefore, taking into account capacity uncertainties is essential to create a moreresilient flight schedule. This paper addresses the flight pre-departure sequencing issue and intro-duces a capacity uncertainty model for optimizing flight schedule at the airport network *** goal of the model is to reduce the total cost of flight delays while increasing the robustnessof the optimized schedule. A chance-constrained model is developed to address the capacity uncer-tainty of airports and sectors, and the significance of airports and sectors in the airport network isconsidered when setting the violation probability. The performance of the model is evaluated usingreal flight data by comparing them with the results of the deterministic model. The development ofthe model based on the characteristics of this special optimization mechanism can significantlyenhance its performance in addressing the pre-departure flight scheduling problem at the airportnetwork level.

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Progress of the TianQin project

arXiv

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arXiv 2025年

作者： Luo, Jun Bai, Shaojun Bai, Yan-Zheng Cai, Lin Dang, Hao Dong, Qijia Duan, Hui-Zong Du, Yuanbo Fan, Lei Fu, Xinju Gao, Yong Gou, Xingyu Gu, Defeng Guo, Changlei Hong, Wei Hu, Bin Hu, Heran Hu, Ming Hu, Yi-Ming Huang, Fa Peng Ji, Xin Jiang, Yuan-Ze Li, En-Kun Li, Hongyin Li, Ming Li, Ming Li, Yong Li, Zhu Li, Zizheng Lian, JunXiang Liang, Yu-Rong Lin, Xudong Liu, Jianping Liu, Lin-Xia Liu, Kui Liu, Li Liu, Minghe Liu, Qi Liu, Yan-Chong Liu, Yue Luo, Peng-Shun Luo, Yingxin Ma, Yi-Qiu Ma, Yun Meng, Yunhe Milyukov, Vadim Peng, Jian-Guo Postnov, Konstantin Qu, Shao-Bo Shan, Tilei Shao, Cheng-Gang Shi, Changfu Song, Pei-Yi Song, Yunfei Su, Wei Tan, Ding Yin Tan, Shuping Tan, Yu-Jie Tan, Wenhai Tu, Liangcheng Wang, Cheng-Rui Wang, Guoyong Wang, Lijiao Wang, Pan-Pan Wang, Shun Wang, Xiaoyong Wang, Xudong Wang, Yan Wei, Ran Wu, Shu-Chao Xu, Jie Xu, Zhi-Lin Xue, Chao Yan, Hao Yan, Yong Yang, Changpeng Yang, Shanqing Yeh, Hsien-Chi Yin, Hang Tong, Yelong Yu, Jian-Bo Yuan, Wen-Hao Zhang, Bu-Tian Zhang, Dexuan Zhang, Jian-Dong Zhang, Jie Zhang, Lihua Zhang, Xuefeng Zhao, Guoying Zhao, Liqian Zhao, Xin Zhou, An-Nan Zhou, Hao Zhou, Peng Zhou, Yupeng Zhou, Ze-Bing Zhu, Fan Zhu, Liang-Gui Zhu, Lin Zou, Kui Mei, Jianwei MOE Key Laboratory of TianQin Mission TianQin Research Center for Gravitational Physics School of Physics and Astronomy Frontiers Science Center for TianQin Gravitational Wave Research Center of CNSA Sun Yat-sen University Zhuhai Campus Zhuhai519082 China National Gravitation Laboratory MOE Key Laboratory of Fundamental Physical Quantities Measurement School of Physics Huazhong University of Science and Technology Wuhan430074 China DFH Satellite Co. Ltd. Beijing100094 China Beijing Institute of Space Mechanics & Electricity Beijing100076 China National Key Laboratory of Spacecraft Thermal Control of Institute of Spacecraft System Engineering Beijing100094 China Space Star Technology CO. LTD. Beijing100095 China Beijing Institute of Control Engineering Beijing100094 China School of Artificial Intelligence Sun Yat-sen University Zhuhai Campus Zhuhai519082 China Shanxi Xi’an710199 China Sternberg Astronomical Institute M.V. Lomonosov Moscow State University Moscow119234 Russia Kavli Institute for Astronomy and Astrophysics Peking University Beijing100871 China

TianQin is a future space-based gravitational wave observatory targeting the frequency window of 10−4 Hz ∼ 1 Hz. A large variety of gravitational wave sources are expected in this frequency band, including the merger of massive black hole binaries, the inspiral of extreme/intermediate mass ratio systems, stellar-mass black hole binaries, Galactic compact binaries, and so on. TianQin will consist of three Earth orbiting satellites on nearly identical orbits with orbital radii of about 105 km. The satellites will form a normal triangle constellation whose plane is nearly perpendicular to the ecliptic plane. The TianQin project has been progressing smoothly following the "0123" technology roadmap. In step "0", the TianQin laser ranging station has been constructed and it has successfully ranged to all the five retro-reflectors on the Moon. In step "1", the drag-free control technology has been tested and demonstrated using the TianQin-1 satellite. In step "2", the inter-satellite laser interferometry technology will be tested using the pair of TianQin-2 satellites. The TianQin-2 mission has been officially approved and the satellites will be launched around 2026. In step "3", i.e., the TianQin-3 mission, three identical satellites will be launched around 2035 to form the space-based gravitational wave detector, TianQin, and to start gravitational wave detection in space. © 2025, CC BY.

关键词： Laser interferometry

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Triple-Cladding Ytterbium Doped Fiber for 12 kW Single Module

Triple-Cladding Ytterbium Doped Fiber for 12 kW Single Modul...

引用

Asia Communications and Photonics Conference and Exhibition (ACP)

作者： Yue Meng Zuying Xu Xudong Shi Yu Li Tianying Liu Can Li Xiao Yan Wei Zheng Heng Wang Jiangang Yu Zhiyong Zhao Ming Tang Optical fiber R&D center Everfoton Technologies Corp oration Limited State Key Laboratory of Optic al Fiber and Cable Manufactu re Technology Yangtze Optical Fibre and Cable Joint Stock Limited Company Wuhan 4 China Optical fiber R&D center Everfoton Technologies Corp oration Limited Wuhan China Wuhan National Lab for Optoelectronics (WNLO) & National Engineering Laboratory for Next Generation Internet Access System School of Optical and Electronic Information Huazhong University of Science and Technology Wuhan China

High power continuous-wave ytterbium-doped fiber lasers have unique advantages such as high electro-optical efficiency, excellent beam quality and good thermal management, and are widely used in industrial materials processing and scientific research. However, multi-kW $(\geqslant$ 10kW) high-power fiber lasers has encountered numerous technology challenges in double-cladding fibers. In this work, we designed and fabricated a triple-cladding ytterbium doped fiber with large core diameter by using Modified Chemical Vapor Deposition (MCVD) combined with all-gas-phase doping method. An excellent laser performance could be demonstrated for such a fiber with an output power of more than 10 kW and a slope efficiency of 82%, no Transverse Mode instability (TMI) is observed. Long-term laser stability at 12 kW-level was carried out in a master oscillator power amplifier (MOPA) laser system for 500 hours with power degradation less than 1%, meanwhile a stimulated Raman scattering (SRS) suppression ratio that is larger than 45dB was obtained.

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Controlled Propulsion of Asymmetric Janus Microdimer Swimmers under Rotating Magnetic Fields

Controlled Propulsion of Asymmetric Janus Microdimer Swimmer...

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IEEE Conference on Industrial Electronics and Applications (ICIEA)

作者： Shimin Yu Tianlong Li Shaopeng Wu State Key Laboratory of Robotics and System Harbin Institute of Technology Harbin China Harbin Institute of Technology Harbin China

ISBN: (数字)9781728151694

ISBN: (纸本)9781728151700

Untethered micro-/nanorobots at low Reynolds numbers present significant potential in biomedical applications as result of their enhanced power, remote actuation, and versatility. Herein, a highly efficient asymmetric Janus microdimer swimmer propelled by a rotating uniform magnetic field was investigated experimentally. The asymmetric microdimers can achieve speed of 98 μm·s -1 at 20 Hz and 5 mT. Besides, the controllable and flexible motility performance of microdimer motors can be easily obtained by adjusting the magnetic field. Such an asymmetric Janus microdimer swimmer is highly promising in a variety of realistic micro-/nanoscale scenarios.

关键词： Industrial electronics Navigation Conferences Propulsion Nanoscale devices Trajectory Magnetic fields

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A Green Synthesis of Ru Modified g-C_(3)N_(4) Nanosheets for Enhanced Photocatalytic Ammonia Synthesis

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Energy Material Advances 2021年第1期2021卷 78-89页

作者： Derek Hao Jiawei Ren Ying Wang Hamidreza Arandiyan Magnus Garbrecht Xiaojuan Bai Ho Kyong Shon Wei Wei Bing-Jie Ni Centre for Technology in Water and Wastewater(CTWW) School of Civil and Environmental EngineeringUniversity of Technology Sydney(UTS)SydneyNSW 2007Australia State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China Laboratory of Advanced Catalysis for Sustainability School of ChemistryThe University of SydneySydney 2006Australia Centre for Advanced Materials&Industrial Chemistry(CAMIC) School of ScienceRMIT UniversityMelbourneVIC 3000Australia Australian Centre for Microscopy and Microanalysis The University of SydneySydney 2006Australia Beijing Engineering Research Center of Sustainable Urban Sewage System Construction and Risk Control Beijing University of Civil Engineering and ArchitectureBeijing 102612China

Nitrate is a crucial environmental pollutant,and its risk on ecosystem keeps *** conversion of nitrate to ammonia can simultaneously achieve the commercialization of environmental hazards and recovery of valuable ammonia,which is green and sustainable for the ***,due to the thermodynamic and kinetic energy barriers,photocatalytic nitrate reduction usually involves a higher selectivity of the formation of nitrogen that largely limits the ammonia synthesis *** this work,we reported a green and facile synthesis of novel metallic ruthenium particle modified graphitic carbon nitride *** with bulk graphitic carbon nitride,the optimal sample had 2.93-fold photocatalytic nitrate reduction to ammonia activity(2.627 mg/h/gcat),and the NH3 selectivity increased from 50.77%to 77.9%.According to the experimental and calculated results,the enhanced photocatalytic performance is attributed to the stronger light absorption,nitrate adsorption,and lower energy barrier for the generation of *** work may provide a facile way to prepare metal modified photocatalysts to achieve highly efficient nitrate reduction to ammonia.

关键词： ammonia nitrate selectivity

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Characterization of molten 2LiF–BeF_2 salt impregnated into graphite matrix of fuel elements for thorium molten salt reactor

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Nuclear Science and Techniques 2019年第5期30卷 32-39页

作者： Hong-Xia Xu Jun Lin Ya-Juan Zhong Zhi-Yong Zhu Yu Chen Jian-Dang Liu Bang-Jiao Ye Center for Thorium Molten Salt Reactor System Shanghai Institute of Applied PhysicsChinese Academy of Sciences State Key Laboratory of Particle Detection and Electronics University of Science and Technology of China USTC

The impregnation behavior of molten 2LiF–BeF_2(FLiBe) salt into a graphite matrix of fuel elements for a solid fuel thorium molten salt reactor(TMSR-SF) at pressures varying from 0.4 to 1.0 MPa was studied by mercury intrusion, molten salt impregnation, X-ray diffraction, and scanning electron microscopy *** was found that the entrance pore diameter of the graphite matrix is less than 1.0 μm and the contact angle is about 135°. The threshold impregnation pressure was found to be around 0.6 MPa experimentally, consistent with the predicted value of 0.57 MPa by the Washburn equation. With the increase of pressure from 0.6 to 1.0 MPa, the average weight gain of the matrix increased from 3.05 to 10.48%,corresponding to an impregnation volume increase from 2.74 to 9.40%. The diffraction patterns of FLiBe are found in matrices with high impregnation pressures(0.8 MPa and1.0 MPa). The FLiBe with sizes varying from tens of nanometers to a micrometer mainly occupies the open pores in the graphite matrix. The graphite matrix could inhibit the impregnation of the molten salt in the TMSR-SF with a maximum operation pressure of less than 0.5 MPa.

关键词： keywords Molten salt reactor FLiBe Impregnation Graphite matrix

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Influence of pollution chemical components on AC flashover performance of various types of insulators

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High Voltage 2019年第2期4卷 105-112页

作者： Zhongyi Yang Xingliang Jiang Xingbo Han Zhijin Zhang Jianlin Hu State Key Laboratory of Power Transmission Equipment&System Security and New Technology School of Electrical EngineeringChongqing UniversityShapingba DistrictChongqing400044People's Republic of China

The pollution on insulators is composed of various chemical components,which threaten the stability of external ***,the existing insulation designs have not taken this issue into *** work aimed to study the influence of pollution chemical components on flashover performance of insulators with various *** tests of porcelain,glass and silicone rubber insulators polluted by eight types of common contaminants were *** on the test data,the influence of chemical components and their solubility on equivalent salt deposit density(ESDD)and insulator flashover performance were analysed;and the electrical properties of different types of insulators were *** show that the ESDD contribution rate changes with chemical *** dissolution characteristic has a significant influence on the measurement of ESDD;slightly soluble contaminants need to be considered *** corresponding insulator flashover gradient for ions can be summarised as Cl^(−)

关键词： pollution insulator flash

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