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Speciation of the elements and compositions on the surfaces of dust storm particles:The evidence for the coupling of iron with sulfur in aerosol during the long-range transport

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Chinese Science Bulletin 2005年第8期50卷 738-744页

作者： ZHANG Xingying1,2. ZHUANG Guoshun1,2.3, chen Jianmin2.& XUE Huaxin2.1. Center for Atmospheric Environment Study, department of Chemistry,{2., beijing 100875, China 2. Center for Atmospheric Chemistry Study, department of Environ- mental Science and Engineering, Fudan university, Shanghai 2.0433, China 3. LAPC/NZC, Institute of Atmospheric Physics, NZC/LAPC, Chinese Academy of Sciences, beijing 10002., China Center for Atmospheric Environment Study Department of Chemistry Beijing Normal University Beijing 100875 China Center for Atmospheric Chemistry Study Department of Environmental Science and Engineering Fudan University Shanghai 200433 China LAPC/NZC Institute of Atmospheric Physics NZC/LAPC Chinese Academy of Sciences Beijing 100029 China

The speciation of the elements on the surface of the particles collected during dust storm and non-dust storm in beijing and Inner Mongolia was studied by XPS. The ma- jor species of iron on the surface were oxides, sulfate, silicate, FeOOH and minor part sorbed on SiO2.{2.2.3. Sulfate is the dominant species of sulfur on the surface. SiO2.and {2.2.3 are the main components of Si and {2. on the surface respectively. One of the most important findings was that the Fe(II) (FeS and FeSO4) produced could account for up to 44.3% and 45.6% of the tot{2. Fe on the surface in the aerosol sample collected at that night and next day of the “peak” time of the dust storm occurring on March 2., 2.02. while Fe2.SO4)3, one of the Fe(III) species on the surface decreased from 67.1% to 49.5% and 48.0% respectively. Both S and Fe en- riched on the surface of aerosol particles. Fe(II) accounted for 1.3%?5.3% of tot{2. Fe in bulk aerosol samples during dust storm. These results provided strong evidence to sup- port the hypothesis of the coupling between iron and sulfur in aerosols during the long-range transport, which would have important impact on the glob{2. biogeochemic{2. cycle.

关键词：物种形成原理 XPS 大气悬浮物 Fe-S结合粒子集合

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Compatibility between glass sealants and electrode materials of solid oxide fuel cells

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Rare Metals 2008年第4期27卷 378-383页

作者： PIAO Jinhua SUN Kening chen Xinbing department of Applied Chemistry Harbin Insstnte of Technology Harbin 150001 China department of Materials Science and Engineering Beijing Normal University Beijing 100875 China

BaO-CaO-al2.3-SiO2.La2.3-B2.3 system glass materials were investigated as sealants for a solid oxide fuel cell （SOFC）. The transition temperature （Tg and the crystal temperature （Td） values decrease greatly with the increase of BaCO3 content when the other components do not change. For the thermal expansion coefficient （TEC） values, the trend is inverse. The sealant has superior thermal expansion coefficient matching properties with La（Sr）MnO3 （LSM） cathode, La（Sr）FeO3 （LSF） cathode, Ni-LDC （La doped CeO2. anode, and Ni-YSZ （yttria stabilized zirconia） cermet anode. The sealant also has superior stability, compatibility, and good bonding characteristic with these electrode materials at 800-900℃. The results indicate that the aluminosilicate system glass sealant possesses superior compatibility with electrode materials of the solid oxide fuel cell

关键词： solid oxide fuel cell aluminosilicate sealant glass-ceramic compatibility interface

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Re-Identification of the 'Enigmatic' X-ray Source 1RXS J114003.0+12.112

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Chinese Journal of Astronomy and Astrophysics 2006年第4期6卷 430-434页

作者： Jiang-Hua Wu Tigran Movsessian Yang chen Xiang-Tao He Xu Zhou Jun Ma National Astronomical Observatories Chinese Academy of Sciences Beijing 100012 Byurakan Astrophysical Observatory Aragatsom Prov. 378433 Armenia department of Astronomy Beijing Normal University Beijing 100875

The ROSAT X-ray source 1RXS J114003.0＋ 12.112.was identified as a starburst galaxy at redshift 0.177 by He et al. The authors also noted that the source is almost two orders of magnitude brighter in X-ray than the X-ray-brightest starburst galaxy and it seems to be in a merging system, making this source an enigmatic system demanding further observations. Here we report a re-identification of 1RXS J114003.0＋12.112.using observations on the 2.6 m telescope at Byurakan Astrophysical Observatory, Armenia and the SDSS data. The results indicate that the starburst activity is associated with the brighter object of the system, while the fainter object is a typical Seyfert 1 galaxy at a different redshift （0.2.2.. Therefore, the two objects are not in a merging system, and the Seyfert 1 galaxy naturally accounts for the high X-ray flux. Three more objects reside in the vicinity, but they are all too faint to be responsible for the high X-ray flux.

关键词： galaxies: active-- galaxies: Seyfert-- galaxies: starburst-- X-rays: individual(1RXS J114003.0+12.112.

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Optimal geometrical configuration and oxidation state of cobalt cations in spinel oxides to promote the performance of Li-O_(2. battery

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Nano Research 2024年第1期17卷 221-227页

作者： Yu Zhang Shuting Zhang Mengwei Yuan Yufeng Li Rong Liu Caiyun Nan chen chen Engineering Research Center of Advanced Rare Earth Materials Department of ChemistryTsinghua UniversityBeijing 100084China beijing Key Laboratory of Energy Conversion and Storage Materials Institution College of ChemistryBeijing Normal UniversityBeijing 100875China X-ray diffraction Lab Analytical and Testing CenterBeijing Normal UniversityBeijing 100875China

Co_(3)O_(4) is considered as one of promising cathode catalysts for lithium oxygen(Li-O_(2.)batteries,which contains both tetrahedral Co^(2.)sites(Co^(2.)Td)and octahedral Co^(3+)sites(Co^(3+)Oh).It is important to reveal the effect of optimal geometric configuration and oxidation state of cobalt ion in Co_(3)O_(4) to improve the performance of Li-O_(2. ***,through regulating the synthesis process,Co^(2.)and Co^(3+)sites in Co_(3)O_(4) were replaced with Zn and al atoms to form materials with a unique Co *** Li-O_(2. batteries based on ZnCo_(2.O_(4) showed longer cycle life than that of Coal_(2.O_(4),suggesting that in Co_(3)O_(4),the Co^(3+)Oh site is a relatively better geometric configuration than Co^(2.)Td site for Li-O_(2. *** calculations revealed that Co^(3+)Oh sites provide higher catalysis activity,regulating the adsorption energy of the intermediate LiO_(2. and accelerating the kinetics of the reaction in batteries,which further leads to the change of the morphology of the discharge product and ultimately improves the electrochemical performance of the batteries.

关键词： lithium oxygen(Li-O_(2.)batteries geometrical configuration oxidation state lithium peroxide

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Optimized generation of entanglement based on the f-STIRAP technique

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Communications in Theoretical Physics 2024年第7期76卷 37-43页

作者： Dongni chen Jiahui Li Stefano Chesi Ying-Dan Wang department of Physics Korea UniversitySeoul 02841South Korea School of Quantum Information Future Technology Henan UniversityZhengzhou 450046China beijing Computational Science Research Center Beijing 100193China department of Physics Beijing Normal UniversityBeijing 100875China CAS Key Laboratory of Theoretical Physics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China

We consider generating maximally entangled states(Bell states)between two qubits coupled to a common bosonic mode,based on *** the systematic approach developed by Wang et al(2.17 New ***.19093016),we quantify the effects of non-adiabatic leakage and system dissipation on the entanglement generation,and optimize the entanglement by balancing non-adiabatic leakage and system *** find the analytical expressions of the optimal coupling profile,the operation time,and the maximal *** findings have broad applications in quantum state engineering,especially in solid-state devices where dissipative effects cannot be neglected.

关键词： f-STIRAP entanglement optimization perturbation theory

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Analysis on the characteristics of animal tissues based on the Terahertz time domain spectroscopy system

Analysis on the characteristics of animal tissues based on t...

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中国光学学会2.11年学术大会

作者： LU cheng-zhen 1,LIU chen 1,CUI Er-liang 1,LI Jia 1,LIU Wei 1,SUN Ping 2.1.{2. of Physics,Capital nor.al university,beijing 100048,P.R.China beijing Key Laboratory for Terahertz Spectroscopy and Imaging,Key Laboratory of Terahertz Optoelectronics,Ministry of Education,beijing 100048,P.R.China 2.{2. of Physics,beijing nor.al university,beijing Area Major Laboratory of Applied Optics,beijing 100875,PR China)

Terahertz time domain spectroscopy（THz-TDS） technique is a novel and very effective coherent detection method based on femtosecond laser *** has the advantages of non-ionization and low average power,thus it is not thought to be dangerous when THz waves penetrate through the skin *** with visible and infrared light,it also has the characteristics of low scattering,and the surface character and depth pattern of samples can be gotten at the same ***,it makes the terahertz detection in the field of biomedicine possible to measure the tissue in vivo without any *** in 2.02.Knobloch.p et al investigated the metastasis of some biological samples including the larynx of a pig and a human liver in the terahertz imaging *** the same time,skin tissue and related cancers both in vitro and in vivo were studied by *** et *** 2.04,the more systematic research of the response of terahertz radiation to nor.al skin in vivo was made by *** et *** 2.10,*** studied terahertz time domain spectroscopy characterization of human thumb skin in reflection system with waveform rebuilding *** this work,the THz spectral properties of several of fresh animal tissues are studied base on the time domain *** pulse transmission spectra of different animal tissues slices with different thickness is obtained,and the refractive index,absorption and extinction coefficient of these tissues is analyzed and *** to the double Debye model,tissues parameters are simulated and *** theoretical and experimental result is *** works is helpful to make further research of the THz spectral performances of human tissues and cancers.

关键词： animal tissues transmission double Debye model Terahertz time domain spectroscopy

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Discovery of CCDC188 gene as a novel genetic target for human acephalic spermatozoa syndrome

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Protein & Cell 2024年第9期15卷 704-709页

作者： Jing Wang Hui-Juan Jin Yi Lu Zi-Han Wang Teng-Yan Li Lan Xia Hong-Jun Li Bin-Bin Wang Su-Ren chen department of Medical Genetics and Developmental Biology School of Basic Medical SciencesCapital Medical UniversityBeijing 100069China Key Laboratory of Cell Proliferation and Regulation Biology Ministry of EducationDepartment of BiologyCollege of Life SciencesBeijing Normal UniversityBeijing 100875China Graduate School Chinese Academy of Medical Sciences&Peking Union Medical CollegeBeijing 100005China department of Urology Peking Union Medical College HospitalBeijing 100005China Center for Genetics National Research Institute of Family PlanningBeijing 100081China NHC Key Laboratory of Reproductive Health Engineering Technology Research(NRIFP) Beijing 100081China

Dear Editor,Male infertility is a widespread health problem and affects approximately 6%–8%of the male population(Jiao et al.,2.2.).Acephalic spermatozoa syndrome(ASS),a rare but severe type of teratozoospermia,is ch... 详细信息

关键词： al. infertility finally

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关节镜下治疗臀肌挛缩症的应用体会

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实用骨科杂志 2009年第10期15卷 754-756,I0002页

作者：田向东陈宇明林顺福王正义黄沪北京中医药大学第三附属医院骨科北京100029

目的探讨关节镜下治疗臀肌挛缩症的疗效。方法自2.02.6月开始我院采用关节镜下治疗臀肌挛缩症15例患者2.侧病变。术前进行临床分型以判断挛缩组织范围;手术在组织腔室内操作,对挛缩组织行逐层切割松解;术后尽早行功能锻炼。结果所有病... 详细信息

目的探讨关节镜下治疗臀肌挛缩症的疗效。方法自2.02.6月开始我院采用关节镜下治疗臀肌挛缩症15例患者2.侧病变。术前进行临床分型以判断挛缩组织范围;手术在组织腔室内操作,对挛缩组织行逐层切割松解;术后尽早行功能锻炼。结果所有病人均获得了随访6～32.月,优良率100%。术后无伤口血肿、感染、神经损伤等合并症。结论关节镜技术应用对软组织松解治疗臀肌挛缩症,是一种安全、有效、美观、经济的手术方法。

关键词：关节镜臀肌挛缩症组织腔室

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河北邢窑和定窑唐三彩烧制工艺的无损分析

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光谱学与光谱分析 2024年第3期44卷 675-680页

作者：陈殿侯禹存黄信李融武潘秋丽程琳北京师范大学历史学院北京100875 射线束技术教育部重点实验室北京师范大学核科学与技术学院北京100875 河北省文物考古研究院河北石家庄050031 北京师范大学物理学系北京100875

研究了河北邢窑和定窑发掘出土的唐三彩样品的化学成分和物相结构。结果表明,邢窑和定窑唐三彩的胎体有不同的来源或配方;值得注意的是,邢窑唐三彩XY4样品中,存在同时施钙釉和铅釉的工艺。另一方面,邢窑和定窑唐三彩的高铅釉中,普遍存在... 详细信息

研究了河北邢窑和定窑发掘出土的唐三彩样品的化学成分和物相结构。结果表明,邢窑和定窑唐三彩的胎体有不同的来源或配方;值得注意的是,邢窑唐三彩XY4样品中,存在同时施钙釉和铅釉的工艺。另一方面,邢窑和定窑唐三彩的高铅釉中,普遍存在α-石英和微量钙长石的晶相;其中定窑黄釉中存在微量莫来石(3al_(2.O_(3)·2.iO_(2.)晶相和α-Fe_(2.O_(3)晶相;定窑绿釉中存在微量的Pb_(8)Cu(Si_(2.O_(7))晶相;邢窑白釉中存在少量的钾长石(KalSi_(3)O_(8))晶相。这些微量的晶相或是釉料本身所携带或在烧制或冷却过程中发生的复杂的物理化学变化所形成的,对了解早期唐三彩的烧制工艺和真伪识别以及墓葬出土唐三彩产地的研究具有很重要的意义。

关键词：毛细管X光透镜微束X射线荧光 X射线衍射唐三彩

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Boundary layer structure in turbulent rayleigh-bénard convection in a slim box

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Acta Mechanica Sinica 2019年第4期35卷 713-728页

作者： Hong-Yue Zou Wen-Feng Zhou Xi chen Yun Bao Jun chen Zhen-Su She State Key Laboratory for Turbulence and Complex Systems Department of Mechanics and Engineering Science College of Engineering Peking University Beijing 100871 China department of Mechanics College of Engineering Sun Yat-sen University Guangzhou 510275 China

Logarithmic boundary layers have been observed in different regions in turbulence. However, how thermal plumes correlate to the log law of temperature and how the velocity profile changes with pressure gradient are not fully understood. Here, we perform three-dimensional simulations of turbulence in a slim-box without the front and back walls with aspect ratio, width:depth:height=L:D:H=1:1/6:1width:depth:height=L:D:H=1:1/6:1 (respectively corresponding to xx, yy and zz coordinates), in the Rayleigh number Ra=[1×10^8,1×10^10]Ra=[1×10^8,1×10^10] for Prandtl number Pr=0.7Pr=0.7. To investigate the structures of the viscous and thermal boundary layers, we examine the velocity profiles in the streamwise and vertical directions (i.e. UU and WW) along with the mean temperature profile throughout the plume-impacting, plume-ejecting, and wind-shearing regions. The velocity profile is successfully quantified by a two-layer function of a stress length, e^+u=e^+0(z^+)3/2.1+(z^+/z^+sub)4]^1/4eu+=e^+0(z+)3/2.1+(z+/zsub+)4]1/4, as proposed by She et al.(J Fluid Mech, 2.17), though it is neither \pb type nor logarithmic. In contrast, the temperature profile in the plume-ejecting region is logarithmic for all simulated cases, being attributed to the emission of thermal plumes. The coefficient of the temperature log-law, AA, can be described by composition of the thermal stress length ■■θ0■θ0■ and the thicknesses of thermal boundary layer z■subzsub■ and z?bufzbuf■, i.e. A■z?sub/(■■θ0z■buf3/2.A■zsub?/(■θ0■zbuf^3/2.. The adverse pressure gradient responsible for turning the wind direction contributes to intensively emitting plumes and the logarithmic temperature profile at the plume-ejecting region. The Nusselt number scaling and the local heat flux in the slim box are consistent with previous results of the confined cells. Therefore, the slim-box RBC is a preferable system for investigating in-box kinetic and thermal structures of turbulent convection with the large-scale circulation

关键词： Rayleigh-Bénard convection Wall-bounded turbulence Heat transport Direct numerical simulation

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