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Magnetism and Sound Velocities of Iron Carbide （Fe3C） under Pressure

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Chinese Journal of Chemical Physics 2014年第3期27卷 297-301页

作者： Zhao-yi Zeng Cui-e Hu Xun liu Ling-cang Cai College of Physics and electronic engineering Chongqing Normal University Chongqing 400047China National Key Laboratory for Shock Wave and Detonation Physics Research Institute of Fluid Physics Chinese Academy of Engineering Physics Mianyang 521900 China Institute of Pulsed Power Science Kumamoto University Kurokami Kumamoto 860-8555 Japan

The elastic property and sound velocity of FeaC under high pressure are investigated by using the spin-polarized generalized gradient approximation within density-functional theory. It is found that the magnetic phase transition from the ground ferromagnetic （FM） state to the nonmagnetic （NM） state occurs at ～73 GPa. Based on the predicted Hugoniot of Fe3C, we calculate the sound velocities of FM-Fe3C and NM-Fe3C from elastic constants. Compared with pure iron, NM-FeaC provides a better match of compressional and shear sound velocities with the seismic data of the inner core, supporting carbon as one of the light elements in the inner core.

关键词： Alloy Sound velocity Density functional theory

STUDY OF RAY IRRADIATION ON DIAMOND-LIKe CARBON FILMS

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Acta Metallurgica Sinica(english Letters) 2002年第1期15卷 26-32页

作者： G.A. liu T.M. Wang e.Q Department of Applied Physics Southwest Jiao Tong University Chengdu 610031 China Beijing University of Aeronautics and Astronautics Beijing 100083 China Department of Physics Lanzhou University Lanzhou 730000 China

Diamond-like carbon (DLC) films have been deposited on glass substrates usingradio-frequency (rf) plasma deposition method. Gamma -ray, ultraviolet (UV) ray were used toirradiate the DLC films. Raman spectroscopy and infrared (IR) spectroscopy were use to characterizethe changing characteristics of SP^3 C-H bond and hydrogen content in the films due to theirradiations. The results show that, the damage degrees induced by the UV ray on the SP^3 C-H bondsare much stronger than that by the gamma -ray. When the irradiation dose of gamma -ray reaches 1 OX10^4 Gy, the SP^3 C-H bond reduces about 50 percent in number. The square electrical resistance ofthe films is reduced due to the irradiation of UV ray and this is caused by severe oxidation of thefilms. By using the results on optical gap of the films and the fully constrained network theory,the hydrogen content in the as-deposited films is estimated to be l0-25at. percent.

关键词： diamond-like carbon film gamma -ray irradiation ultraviolet rayirradiation SP^3 C-H bond infrared transmittance

Spring-back deformation in tube bending

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International Journal of Minerals,Metallurgy and Materials 2009年第2期16卷 177-183页

作者： Da-xin e Hua-hui He Xiao-yi liu Ru-xin Ning School of Materials Science and engineering Beijing Institute of Technology Beijing 100081 China

The spring-back of a bending metal tube was studied through extensive experiments and finite element method （FeM） analysis. An approximate equation for the spring-back angle of bending was deduced. It is noted that the mechanical properties of the material （in a tubular form） are quite different from those found in the standard tensile tests （when the materials are in bar forms）. This is one of the major reasons that result in the discrepancies in the outcomes of experimental study, FeM calculations, and spring-back analysis. It is therefore of crucial importance to study the mechanical properties of the materials in their tubular forms. The experiments and FeM simulations prove that the spring-back angle is significantly affected by the mechanical properties of the materials. The angle decreases accordingly with plastic modulus, but changes inversely with the hardening index and elastic modulus The spring-back angle is also affected by the conditions of tube deformation： it increases accordingly with the relative bending radius but changes inversely with the relative wall thickness. In addition, the spring-back angle increases nonlinearly with the bending angle.

关键词： tube bending spring-back finite element simulation tensile test

Operational optimization of a building-level integrated energy system considering additional potential benefits of energy storage

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Protection and Control of Modern Power Systems 2021年第1期6卷 55-64页

作者： Sai liu Cheng Zhou Haomin Guo Qingxin Shi Tiancheng e.Song Ian Schomer Yu liu Maintenance Branch Company State Grid Jiangsu Electric Power Co.Ltd.Nanjing211102Jiangsu ProvinceChina Kunshan Power Supply Branch Company State Grid Jiangsu Electric Power Co.Ltd.Kunshan215300Jiangsu ProvinceChina Xiamen Power Supply Company State Grid Fujian Electric Power Co.Ltd.Xiamen361004Fujian ProvinceChina enliten Lab University of TennesseeKnoxvilleTN37996USA School of electrical engineering Southeast UniversityNanjing210096Jiangsu ProvinceChina

As a key component of an integrated energy system(IeS),energy storage can effectively alleviate the problem of the times between energy production and *** the benefits of energy storage can improve the competitiveness of multi-energy *** paper proposes a method for day-ahead operation optimization of a building-level integrated energy system(BIeS)considering additional potential benefits of energy *** on the characteristics of peak-shaving and valley-filling of energy storage,and further consideration of the changes in the system’s load and real-time electricity price,a model of additional potential benefits of energy storage is *** at the lowest total operating cost,a bi-level optimal operational model for day-ahead operation of BIeS is developed.A case analysis of different dispatch strategies verifies that the addition of the proposed battery scheduling strategy improves economic *** results demonstrate that the model can exploit energy storage’s potential,further optimize the power output of BIeS and reduce the economic cost.

关键词： Building-level integrated energy system energy storage Additional potential benefits Bi-level optimization

WRKY11 up-regulated dirigent expression to enhance lignin/lignans accumulation in Lilium regale Wilson during response to Fusarium wilt

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Journal of Integrative Agriculture 2024年第8期23卷 2703-2722页

作者： Jie Deng Zi’e Wang Wenyun Li Xiaohua Chen Diqiu liu Faculty of Life Science and Technology Kunming University of Science and TechnologyKunming 650500China

Lilium are highly economically valuable ornamental plants that are susceptible to Fusarium wilt caused by Fusarium *** regale Wilson,a wild lily native to China,is highly resistant to *** this study,a WRKY transcription factor,WRKY11,was isolated from ***,and its function during the interaction between *** and *** was *** ectopic expression of LrWRKY11 in tobacco increased the resistance to F oxysporum,moreover,the transcriptome sequencing and UHPLC-MS/MS analysis indicated that the methyl salicylate and methyl jasmonate levels rose in LrWRKY11 transgenic tobacco,meanwhile,the expression of lignin/lignans biosynthesis-related genes including a dirigent(DiR)was *** lignin/lignans contents in LrWRKY11-transgenic tobacco also significantly increased compared with the wild-type *** addition,the resistance of *** scales in which LrWRKY11 expression was silenced by RNAi evidently decreased,and additionally,the expression of lignin/lignans biosynthesis-related genes including LrDIR1 was significantly ***,LrDIR1 and its promoter(PLrDIR1)sequence containing the W-box element were isolated from *** interaction assay indicated that LrWRKY11 specifically bound to the W-box element in PLrDIR1 and activated LrDIR1 ***,β-glucuronidase activity in the transgenic tobacco co-expressing LrWRKY11/PLrDIR1-β-glucuronidase was higher than that in transgenic tobacco expressing PLrDIR1-β-glucuronidase ***,the ectopic expression of LrDIR1 in tobacco enhanced the resistance to *** and increased the lignin/lignans *** brief,this study revealed that LrWRKY11 positively regulated *** resistance to *** through interaction with salicylic acid/jasmonic acid signaling pathways and modulating LrDIR1 expression to accumulate lignin/lignans.

关键词： Lilium regale Fusarium oxysporum WRKY transcription factor dirigent

Ammonia and phosphorus removal from using cash crop waste-derived agricultural runoff biochars

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Frontiers of environmental Science & engineering 2020年第3期14卷 141-153页

作者： Alisa Salimova Jian'e Zuo Fenglin liu Yajiao Wang Sike Wang Konstantin Verichev State Key Joint Laboratory of environmental Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China Beijing JingYi Air Protection&Technology Company Wanda Plaza93 Jianguo RoadChaoyang DistrictBeijing 100022China Institute of Civil engineering Faculty of Engineering SciencesUniversidad Austral de ChileValdivia 5090000Chile

Adsorption of biochars(BC)produced from cash crop residuals is an economical and practical technology for removing nutrients from agricultural *** this study,B C made of orange tree trunks and tea tree twigs from the Laoguanhe Basin were produced and modified by aluminum chloride(Al-modified)and ferric sulfate solutions(Fe-modified)under various pyrolysis temperatures(200℃-600℃)and residence times(2-5 h).All produced and modified B C were further analyzed for their abilities to adsorb ammonia and phosphorus with initial concentrations of 10-40 mg/L and 4-12 mg/L,***-modified Tea Tree B C 2h/400℃showed the highest phosphorus adsorption capacity of 0.56 mg/***-modified Orange Tree B C 3h/500℃showed the best performance for ammonia removal with an adsorption capacity of 1.72 mg/*** characterization showed that P=O bonds were formed after the adsoiption of phosphorus by modified BC,N-H bonds were formed after ammonia adsorption.X P S analysis revealed that the key process of ammonia adsorption was the ion exchange between K+and N H *** adsorption was related to oxidation and interaction between PO43-and Fe3+.According to X R D results,ammonia was found in the form of potassium amide,while phosphorus was found in the form of iron hydrogen *** sorption isotherms showed that the Freundlich equation fits better for phosphorus adsorption,while the Langmuir equation fits better for ammonia *** simulated runoff infiltration experiment showed that 97.3%of ammonia was removed by Al-modified Orange tree B C 3h/500℃,and 92.9%of phosphorus was removed by Fe-modified Tea tree B C 2h/400℃.

关键词： Biochar Adsorption Ammonia removal Phosphorus removal Agricultural runoff

effect of Polymer Chain Regularity on the Photovoltaic Performance of Organic Solar Cells

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Chinese Journal of Polymer Science 2022年第8期40卷 996-1002,I0012页

作者： Hang Wang Hao Lu Ya-Nan Chen Andong Zhang Yuqiang liu Cai’e Zhang Yahui liu Xinjun Xu Zhishan Bo College of Textiles&Clothing State Key Laboratory of Bio-fibers and Eco-textilesQingdao UniversityQingdao266071China Beijing Key Laboratory of energy Conversion and Storage Materials College of ChemistryBeijing Normal UniversityBeijing100875China College of Materials Science and engineering Shenzhen UniversityShenzhen518060China

In this work,regio-regular and random polymers(reg-PTF and ran-PTF)comprising benzodithiophene and 3-fluorothiophene units are developed to investigate the influence of polymer chain regularity on the photovoltaic ***,reg-PTF exhibits higher HOMO energy level(∼0.2 eV)than that of ran-PTF due to the more ordered molecular structure and higher *** the result,the HOMO energy level offset between donor and acceptor can be well controlled by selecting different *** BTP-ec9-4F with a much deep HOMO energy level as acceptor,reg-PTF-based devices display an inferior PCe of 7.66%compared with ran-PTF based ones(11.78%)due to the too large HOMO energy levels *** blending with Y18-1F,the PCe of reg-PTF-based devices is increased to 13.23%due to the appropriate energy *** comparison,the ran-PTF-based devices nearly do not work because of the negative HOMO energy levels *** work indicates that both the polymer chain regularity and the energy level offset between the donor and acceptor material are important to the performance of organic solar cells.

关键词： Organic solar cells Polymer donor Regio-regular polymer Random polymer energy level offset

Polyimide separators for rechargeable batteries

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Journal of energy Chemistry 2021年第7期30卷 170-197页

作者： Ziheng Lu Fan Sui Yue-e Miao Guohua liu Cheng Li Wei Dong Jiang Cui Tianxi liu Junxiong Wu Chunlei Yang Shenzhen Institutes of Advanced Technology Chinese Academy of SciencesShenzhen 518055GuangdongChina College of Materials Science and engineering Donghua UniversityShanghai 201620China Department of Materials Science and engineering Clemson UniversityClemsonSC 29634USA Department of Mechanical engineering The Hong Kong Polytechnic UniversityHong KongChina

Separators are indispensable components of modern electrochemical energy storage devices such as lithium-ion batteries(LIBs).They perform the critical function of physically separating the electrodes to prevent short-circuits while permitting the ions to pass *** conventional separators using polypropylene(PP) and polyethylene(Pe) are prone to shrinkage and melting at relatively high temperatures(150℃ or above) causing short circuits and thermal runaway,separators made of thermally stable polyimides(PIs) are electrochemically stable and resistant to high temperatures,and possess good mechanical strength-making them a promising solution to the safety concerns of *** this review,the research progress on PI separators for use in LIBs is summarized with a special focus on molecular design and microstructural *** view of the significant progress in advanced chemistries beyond LIBs,recent advances in PI-based membranes for applications in lithium-sulfur,lithium-metal,and solid-state batteries are also ***,practical issues are also discussed along with their prospects.

关键词： Polyimide Lithium-ion batteries Separators Solid-state batteries Molecular design

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基于数字博物馆接触的青年传统文化认同

新闻与传播评论 2025年第1期78卷 46-65页

作者：韩博刘嘉琪中国社会科学院新闻与传播研究所北京100021

数字文博产品在吸引青年走进“云端”博物馆的同时,也带领他们走近中华优秀传统文化。为探索青年群体从数字博物馆的接触中生成传统文化认同,刻画其表征、影响因素与过程,论文以“云游敦煌”“数字故宫”等17个代表性数字博物馆为样本,... 详细信息

数字文博产品在吸引青年走进“云端”博物馆的同时,也带领他们走近中华优秀传统文化。为探索青年群体从数字博物馆的接触中生成传统文化认同,刻画其表征、影响因素与过程,论文以“云游敦煌”“数字故宫”等17个代表性数字博物馆为样本,以QQ空间中的大规模评论数据为基准材料,采用混合研究设计:第一阶段,利用扎根理论对相关评论内容进行质化研究;第二阶段,随机招募到全国4365个有效青年样本参加线上问卷调查。研究结果显示:数字博物馆接触是促成青年传统文化认同的有力途径。其中,数字博物馆文化情境中的文化展品与文化表征耦合构成吸引青年的基础条件,启动环节在于唤醒青年主体的具身联觉,加工环节在于激活个体内隐文化心理加工过程以形成更深层次的文化感知,最终青年传统文化认同生成或强化的表现主要呈现于认知认同、情感涌现和行为实践三个方面。此外,与原有文化印象的比较和集体文化记忆的勾连,作为调节因素共同影响着青年传统文化认同结果。

关键词：青年数字博物馆传统文化认同扎根理论