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Confirm.tion of a Sub-Saturn-size Transiting Exoplanet Orbiting a G Dw.rf:TOI-1194 b and a Very Low.m.ss Com.anion Star: TOI-1251 B from.TESS

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Research in Astronom. and Astrophysics 2024年第3期24卷 129-143页

作者： Jia-Qi w.ng Xiao-Jun Jiang Jie Zheng Hanna Kellerm.nn Arno Riffeser Liang w.ng Karen A.collins Allyson Bieryla Lars A.Buchhave Steve B.How.ll Elise Furlan Eric Girardin Joao Gregorio Eric Jensen Felipe m.rgas m.sut Yilm.z Sam.Quinn Xing Gao Ruo-Yu Zhou Frank Grupp Hui-Juan w.ng CAS Key Laboratory of Optical Astronom. National Astronomical ObservatoriesChinese Academy Of SciencesBeijing 10010China University of Chinese Academ. of Sciences Beijing 100049China University Observatory m.nich Scheinertrsse 1.D-81679 MunichGemany m.x Planck Institute for Extraterrestrial Physics Giessenbachstr.1D-85748 GarchingGermany National Astronom.cal Observatories/Nanjing Institute of Astronom.cal Optics&Technology Chinese Academy of SciencesNanjing210042China CAS Key Laboratory of Astronom.cal Optics&Technology Nanjing Institute of Astronomical Optics&TechnologyNanjing 210042China Center for Astrophysics Harvard&Smithsonian60 Garden Street.CambridgeMA 02138USA National Space Institute Technical University of DenmarkElektrovejDK-2800 KgsLyngbyDenmark NASA Am.s Research Center Moffett FieldCA 94035USA NASA Exoplanet Science Institute Caltech/IPACMail Code 100-221200 E.California Blvd.PasadenaCA91125USA Grand Pra Observatory Switzerland Departm.nt of Physics Washington UniversitySt.LouisMO 63130.USA Departm.nt of Physics and Astronom. Swarthmore CollegeSwarthmorePA 19081USA Instituto de Astrofísica de Canarias(IAC) E-38205 La Laguna.TenerifeSpain Departam.nto de Astrofísica Universidad de La LagunaSpain Dept.of Astronom. and Space Sciences Ankara UniversityTandogan 06100AnkaraTurkey Xinjiang Astronom.cal Observatory Chinese Academy of SciencesUrumqi 830011China Urum.i No.1 Senior High School Urumqi 830002China Lijiang Gem.ni Observatory Lijiang 674199China

w. report the confirm.tion of a sub-Saturn-size exoplanet,TOI-1194 b,w.th a m.ss of about 0.456+0.055-0.051m.(J),and a very low.m.ss com.anion star w.th a m.ss of about 96.5±1.5 m.,TOI-1251 *** candidates provided by the Transiting Exoplanet Survey Satellite(TESS)are suitable for further follow.up observations by ground-based telescopes w.th sm.ll and m.dium.*** analysis is perform.d based on data from.several telescopes w.rldw.de,including telescopes in the Sino-Germ.n m.ltiband photom.tric cam.aign,w.ich aim.d at confirm.ng TESS Objects of Interest(TOIs)using ground-based sm.ll-aperture and m.dium.aperture telescopes,especially for long-period ***-1194 b is confirm.d based on the consistent periodic transit depths from.the m.ltiband photom.tric *** m.asure an orbital period of 2.310644±0.000001 days,the radius is 0.767+0.045-0.041RJ and the am.litude of the RV curve is 69.4_(-7.3)^(+7.9)m.s^(-1).TOI-1251 B is confirm.d based on the m.ltiband photom.tric and high-resolution spectroscopic data,w.ose orbital period is 5.963054+0.000002-0.000001days,radius is 0.947+0.035-0.033 R_(J) and am.litude of the RV curve is 9849_(-40)^(+42)m.^(-1).

关键词： planets and satellites fundam.ntal param.ters-planets and satellites gaseous planets-stars fundam.ntal param.ters-stars low.m.ss-m.thods data analysis-techniques photom.tric-techniques spectroscopic

Liver regeneration using decellularized splenic scaffold: a novel approach in tissue engineering

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Hepatobiliary & Pancreatic Diseases International 2015年第5期14卷 502-508页

作者： Jun-Xi Xiang Xing-long Zheng Rui Gao w.n-quan w. Xu-long Zhu Jian-Hui Li Yi Lv Departm.nt of Hepatobiliary Surgery First Affiliated Hospital of Xi'an Jiaotong University Departm.nt of Surgical Oncology Shaanxi Provincial People's Hospital

BACKGROUND： The potential application of decellularized liver scaffold for liver regeneration is lim.ted by severe shortage of donor organs. Attem.t of using heterograft scaffold is accom.anied w.th high risks of zoonosis and im.unological rejection. w. proposed that the spleen, w.ich procured m.re extensively than the liver, could be an ideal source of decellularized scaffold for liver regeneration. m.THODS： After harvested from.donor rat, the spleen w.s processed by 12-hour freezing/thaw.ng ×2 cycles, then circulation perfusion of 0.02% trypsin and 3% Triton X-100 sequentially through the splenic artery for 32 hours in total to prepare decellularized scaffold. The structure and com.onent characteristics of the scaffold w.re determ.ned by hem.toxylin and eosin and im.um.histochem.cal staining, scanning electron m.croscope, DNA detection, porosity m.asurem.nt, biocom.atibility and cytocom.atibility test. Recellularization of scaffold by 5×106 bone m.rrow.m.senchym.l stem.cells（Bm.Cs） w.s carried out to prelim.narily evaluate the feasibility of liver regeneration by Bm.Cs reseeding and differentiation in decellularized splenic ***： After decellularization, a translucent scaffold, w.ich retained the gross shape of the spleen, w.s generated. Histological evaluation and residual DNA quantitation revealed the rem.ining of extracellular m.trix w.thout nucleus and cytoplasm.residue. Im.unohistochem.cal study proved the existence of collagens I, IV, fibronectin, lam.nin and elastin in decellularized splenic scaffold, w.ich show.d a sim.larity w.th decellularized liver. A scanning electron m.croscope presented the rem.ining three-dim.nsional porous structure of extracellular m.trix and sm.ll blood vessels. The poros-ity of scaffold, aperture of 45.36±4.87 μm.and pore rate of 80.14%±2.99% w.s suitable for cell engraftm.nt. Subcutaneous im.lantation of decellularized scaffold presented good histocom.atibility, and recellularization of the splenic scaffold dem.nstr

关键词： tissue engineering liver regeneration decellularized scaffold spleen bone m.rrow.m.senchym.l stem.cells

Physical and num.rical investigation on fluid flow.and inclusion rem.val behavior in a single-strand tundish

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Journal of Iron and Steel Research International 2023年第6期30卷 1182-1198页

作者： Qi quan Zhi-xiao Zhang Tian-peng Qu Xiang-long Li Jun Tian De-yong w.ng School of Iron and Steel Soochow UniversitySuzhou 215137JiangsuChina

Aim.ng at the problem.that the existence of inclusions in the tundish continuous casting process can easily lead to quality defects of the slab,the stainless steel continuous casting tundish w.s taken as the research *** effects of flow.control device,inclusion density and inclusion size on the m.xing characteristics of m.lten steel and inclusion behavior in tundish w.re *** results show.d that com.ared w.th the tundish w.thout flow.control device,the average residence tim. of m.lten steel w.s prolonged by about 49 s,the dead zone volum. fraction w.s reduced by 8.93%,and the piston fluid integral rate w.s increased by 12.68%.In the turbulence inhibitor(TI)tundish w.th w.ir-dam.com.ination,the rem.val rate of inclusions w.th a density of 2700 kg m.(-3) and a particle size of 5 lm.is 63.32%,w.ile the rem.val rate of large inclusions w.th a density of 150μm.could reach 89.04%.w.en the inclusion particle size w.s 10-50μm.and the density w.s 2700-4500 kg m.(-3),the effect of inclusion density on inclusion rem.val rate w.s *** the sam. tim.,w.en w.ir-dam.com.ination TI tundish w.s set,the inclusions w.re m.inly lim.ted to the slag-m.tal interface of the first and second cham.ers of the *** rem.val rate of inclusions in the first cham.er w.s generally im.roved,w.th 10μm.inclusions accounting for 47.67% and 150μm.inclusions accounting for 60.69%.Furtherm.re,it has the best effect on the rem.val of sm.ll-size inclusions,especially those less than 70μm.

关键词： Non-m.tallic inclusion Flow.control device Residence tim. distribution curve Rem.val behavior Discrete particle m.del

Discrete m.lti-step phase hologram.for high frequency acoustic m.dulation

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Chinese Physics B 2024年第1期33卷 488-495页

作者：周梦晴李照希李怡王业成张娟谌东东全熠杨银堂费春龙 School of m.croelectronics Xidian UniversityXi'an 710071China

Acoustic hologram. can recover w.vefront stored acoustic field inform.tion and produce high-fidelity com.lex acoustic fields. Benefiting from.the huge spatial inform.tion that traditional acoustic elem.nts cannot m.tch, acoustic hologram. pursue the realization of high-resolution com.lex acoustic fields and gradually tend to high-frequency ultrasound applications. How.ver, conventional continuous phase hologram. are lim.ted by three-dim.nsional(3D) printing size, and the presence of unavoidable sm.ll printing errors m.kes it difficult to achieve acoustic field reconstruction at high frequency accuracy. Here, w. present an optim.zed discrete m.lti-step phase hologram. It can ensure the reconstruction quality of im.ge w.th high robustness, and properly low.r the requirem.nt for the 3D printing accuracy. m.anw.ile, the concept of reconstruction sim.larity is proposed to refine a m.asure of acoustic field quality. In addition, the realized com.lex acoustic field at 20 m.z prom.tes the application of acoustic hologram. at high frequencies and provides a new.w.y to generate high-fidelity acoustic fields.

关键词： discrete m.lti-step phase hologram econstruction quality 3D printing accuracy high-fidelity

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百瓦级中红外光纤随机激光放大

中国激光 2024年第5期51卷 12-18页

作者：高旺城马瑞全欣陈宇范滇元刘军深圳大学微纳光电子学研究院二维材料光电科技国际合作联合实验室广东深圳518060 中国科学院高功率激光物理重点实验室上海201800

中红外波段高功率激光光源在工业加工和生物医疗等领域中有着广泛的应用。报道了基于主振荡器功率放大器(m.PA)结构的百瓦级中红外连续波光纤随机激光器,获得了最高输出功率为100.40 w.斜率效率为47.8%、波长为1980 nm.连续波激光输... 详细信息

中红外波段高功率激光光源在工业加工和生物医疗等领域中有着广泛的应用。报道了基于主振荡器功率放大器(m.PA)结构的百瓦级中红外连续波光纤随机激光器,获得了最高输出功率为100.40 w.斜率效率为47.8%、波长为1980 nm.连续波激光输出。得益于m.PA结构中光纤随机激光种子源在激光放大过程中的光谱带宽保持特性,100.40 w.光输出时的3 dB光谱带宽仅为~0.2 nm.激光器的短时时域强度波动和长时功率波动均表现出优良的稳定性。所提实验技术方案和实验结果有望进一步拓宽中红外高功率光纤随机激光器的应用范围。

关键词：激光器光纤随机激光器高功率激光器瑞利散射中红外激光器高稳定性

Heterointerface of all-alkynyl-protected Au_(28) nanoclusters anchored on NiFe-LDHs boosts oxygen evolution reaction:a case to unravel ligand effect

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Rare m.tals 2023年第12期42卷 4029-4038页

作者： quan-Li Shen long-Yun Shen Le-Yi Chen Lu-Bing Qin Yong-Gang Liu Nicholas m.Bedford Francesco Ciucci Zheng-Hua Tang School of Environm.nt and Energy Guangzhou Higher Education Mega CentreNew Energy Research InstituteSouth China University of TechnologyGuangzhou 510006China Division of Em.rging Interdisciplinary Areas The Hong Kong University of Science and TechnologyHong Kong 999077China Departm.nt of m.chanical and Aerospace Engineering The Hong Kong University of Science and TechnologyHong Kong 999077China School of Chem.cal Engineering University of New South Wales SydneySydneyNSW2052Australia HKUST Shenzhen-Hong Kong Collaborative Innovation Research Institute Shenzhen 518048China Energy Institute The Hong Kong University of Science and TechnologyHong Kong 999077China

Ultrasm.ll Au nanoclusters have been proven to effectively enhance the catalytic perform.nce of NiFe layered double hydroxides(NiFe-LDHs)tow.rd oxygen evolution reaction(OER),yet the surface ligand effect of the Au nanoclusters still rem.ins ***,a system.tic study is reported to exam.ne the OER perform.nce of NiFe-LDHs supported atom.precise all alkynyl-protected[Au_(28)(~tBuC≡C)17]~-nanoclusters(Au_(28)-Alkynyl in short)and thiolate-protected Au_(28)(TBBT)_(20)(TBBT=4-tert-butylbenzene thiol)counterp arts(Au_(28)-Thiolate in short).The Au_(28)-Alkynyl cluster has characteristic absorbance feature,and its com.osition is verified by m.ss *** possesses a drastically different structure from.the reported m.xed ligand protected Au_(28)***,the NiFe-LDHs loaded w.th Au_(28)-Alkynyl exhibited a superior OER perform.nce than the sam.le loaded w.th Au28-Thiolate under the sam. conditions,evidenced by a sm.ller overpotential of 205 m. at the current density of 10 m.·cm.(-2)and a low.r Tafel slope value of 41.0 m.·dec^(-1)in 1 m.l·L^(-1)*** excellent perform.nce is attributed to the interfaces created betw.en the NiFe-LDHs and the Au nanoclusters,as density functional theory calculations reveal that m.re significant charge transfer occurs in Au_(28)-Alkynyl/NiFeLDHs catalyst,and m.re im.ortantly,the energy barrier of the potential-determ.ning step in the OER process for Au28-Alkynyl/NiFe-LDHs is m.ch low.r than that of Au28-Thiolate/NiFe-LDHs hence favors the electrocatalytic reaction.

关键词： NiFe layered double hydroxides Au_(28)nanoclusters Alkynyl ligand Oxygen evolution reaction Density functional theory calculations

Structure and m.gnetic properties of m.lt-spun Sm.Fe-Nb ribbons and their nitrides

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Rare m.tals 2018年第3期37卷 232-236页

作者： w.n-long Yan Yang Luo Dun-Bo Yu Gui-Yong w. Ning-Tao quan Yuan-Fei Yang Hai-Jun Peng Zi-long w.ng National Engineering Research Center for Rare Earth m.terials General Research Institute for Nonferrous MetalsGrirem Advanced Materials Co. Ltd.

Sm.e（10-x）Nbx（x = 0, 0.1, 0.2, 0.3） ribbons and their nitrides w.re prepared by m.lt-spinning, follow.d by annealing and subsequent nitriding. The structure and m.gnetic properties w.re investigated by m.ans of X-ray diffraction（XRD） using the Rietveld m.thod, vibrating sam.le m.gnetom.ter（VSm., transm.ssion electron m.croscope（TEm. and m.ssbauer spectroscopy. XRD analysis show. that the addition of Nb can im.ede the precipitation of Sm. Fe（17） and a-Fe phases and the Nb atom. occupy 2 e site in the alloys. At 300 K, the m.an hyperfine fields of 2 e site are 29.58 T w.th Nb doping at x = 0.1 and the corresponding Curie tem.erature is 552 K. The optim.l properties of rem.nence of Br = 0.9 T, intrinsic coercivity of H（cj）= 741.5 kA·m.-1, and m.xim.m.m.gnetic energy product of（BH）（m.x）= 124.2 kJ·m.（-3） are gained at x = 0.10 in the nitrides.

关键词： m.lt-spinning Sm.e10-xNbx pow.ers m.gnetic properties XRD Rietveld m.ssbauer spectroscopy

Conjugate Fluorescent Com.ound Based on Pyrene-im.dazole: Design, Synthesis, Crystal Structure and Fluorescence Property

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Chinese Journal of Structural Chem.stry 2019年第4期38卷 550-558页

作者： LIU Yu-long GUO You-quan DONG Zhao-Jia FU Ying College of Science Northeast Agricultural University Departm.nt of Basic Heilongjiang Vocational College of Biology Science and Technology

Pyrenes are an im.ortant group of polycyclic arom.tic hydrocarbons(PAHs). In order to expand the diversity of conjugate com.ounds based on pyrene, tw. new.isom.ric com.ounds anti-PyDTPAI and syn-PyDTPAI containing pyrene, im.dazole and triphenylam.ne are synthesized via a one-pot cyclization reaction and characterized. The anti-PyDTPAI is characterized by single-crystal X-ray diffraction w.ich crystallizes in m.noclinic, space group P2_1/n w.th a = 10.132(4), b = 14.997(7), c = 18.968(9) ?, β = 95.543(19)o, V = 2869(2) ?~3, Z = 2, F(000) = 1092, Dc = 1.196 m./m.3, m. = 1033.28 and μ(m. Kα) = 0.070 m.^(-1). The presence of interm.lecular C–H···π interactions results in the stability of the com.ound. The crystal structure show. a centrosym.etric, coplanar configuration tow.rds pyrene-im.dazole segm.nt and a slip-stacked packing m.de across the longer m.lecular axis w.ich is sim.lar to the J-type aggregation. The investigation of UV-vis absorption and fluorescence in solution indicates a strong blue em.ssion under the ultraviolet light excitation. The tw. isom.rs also display high therm.l stability w.ich is proved by differential scanning calorim.try(DSC) and therm.gravim.tric analysis(TGA). Additionally, the m.lecular structure and HOm. and LUm. levels are calculated by density functional theory(DFT) at the B3 LYP/6-31 G(d) level.

关键词： pyrenes one-pot reaction crystal structure photophysical property DFT

水-空气耦合介质中冰载荷对闸墩的撞击影响研究

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工程力学 2024年第6期41卷 177-187页

作者：贡力杨腾腾靳春玲贾治元董洲全兰州交通大学土木工程学院甘肃兰州730070 兰州交通大学调水工程及输水安全研究所甘肃兰州730070

西北干寒地区长距离输水工程中河道修建的闸墩受到冰载荷撞击破坏,为确保冬季安全稳定供水,需进行冰载荷对闸墩撞击破坏力学特性研究。该文采用任意拉格朗日-欧拉(arbitrary Lagrangian-Eulerian, ALE)流固耦合(fluid structure interac... 详细信息

西北干寒地区长距离输水工程中河道修建的闸墩受到冰载荷撞击破坏,为确保冬季安全稳定供水,需进行冰载荷对闸墩撞击破坏力学特性研究。该文采用任意拉格朗日-欧拉(arbitrary Lagrangian-Eulerian, ALE)流固耦合(fluid structure interaction, FSI)方法模拟不同碰撞工况下冰体楔入闸墩碰撞过程,并通过对比实验,验证了冰材料模型参数和ALE算法的适用性,分析了网格尺寸对撞击力的影响。研究结果表明:计算得到冰载荷对闸墩撞击力极值与实验值具有良好的吻合性,表明该模拟所采用的冰材料模型参数、ALE算法和网格尺寸能够较准确模拟冰载荷对闸墩的作用力;闸墩损伤变形与冰排破损主要集中在碰撞接触区,接触区撞击力大小受到“水垫效应”的影响,空气介质对撞击力影响较小;不同冰厚和冰速工况下撞击力时程曲线呈现“Saw.ooth”(上下波动)现象,撞击力加载-卸载时间较短;冰排楔入闸墩的过程中,撞击力极值出现在0°正碰接触区,在冰速1.2 m.s~3.0 m.s范围内,撞击力逐渐减小,在不改变冰速工况下,随着冰厚的增加,墩体结构响应越大,冰速和冰厚两种影响工况下闸墩顶端位移均为周期性振动。其仿真结果拟为西北干寒地区冰期河道中墩体结构安全提供指导。

关键词：数值模拟流固耦合任意拉格朗日-欧拉冰载荷撞击力闸墩