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First large scale application of novel Si stripixel detector in real large experiment: Si VTX in PHENIX upgrade at RHIC

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中国有色金属学会会刊：英文版 2006年第B1期16卷 141-145页

作者： LI Zheng H. ENy. y. GOTO j. TOj. y. AKIBA R. NOUICER A. L. DESHPANDE K. BOy.E V. CIANCIOLO RIKEN BNL Research Center and BNL Instrumentation Division Upton NY 11973-5000 USA RIKEN Wako Saitama 351-0198 Japan BNL Chemistry Department Upton NY 11973-5000 USA Stony.Brook University Department of Physics and Astronomy Stony Brook NY 11794 USA Oak Ridge National Laboratory Oak Ridge TN 37831 USA

2D position sensitive, single-sided Si stripixel detector was selected as the one of the two main components of the Si vertex tracker (Si SVX) in the upgraded PHENIX detector at RHIC (relativistic heavy.ion collider) in Brookhaven National Laboratory.(BNL). This is the first large scale application of the novel Si stripixel detector in a real large experiment after many.y.ars of research and development at BNL. The first and second prototy.e fabrication runs of the SVX stripixel detectors were carried out successfully.in BNL’s Si detector development and processing Lab. The processing of these stripixel detectors is similar to that for the standard single-sided strip detectors: one-sided processing, single implant for the pixel (strip) electrodes, etc. The only.additional processing step is the double metal process, a technology.that is simple and well matured by.many.Si detector processing industries and labs, including BNL. The laser and beam tests on those prototy.e detectors show the 2D position sensitivity.and good position resolution in both X and U coordinates (about 25 μm for 80 μm pitch). For the mass production of 400 sensors needed for the Si SVX, the processing technology.has been successfully.transferred to the industrial: Hamamatsu Photonics (HPK). HPK has produced a pre-production run of stripixel sensors with the full PHENIX SVX specification on 150 mm diameter wafers. The laser tests on these pre-production wafers show good signal to noise ratio (about 20∶1).

关键词：相对论性重离子碰撞 PHENIX探测器天顶跟踪器硅顶点探测器硅条探测器应用

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ANALy.IS OF THREE-DIMENSIONAL UPSETTING PROCESS By.THE RIGID-PLASTIC REPRODUCING KERNEL PARTICLE METHOD

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Acta Metallurgica Sinica(English Letters) 2006年第5期19卷 371-378页

作者： y. H. Liu j. Chen S. y. X. W. Chen National Die and Mould CAD Engineering Research Center Shanghai Jiao Tong UniversityShanghai 200030 China

A meshless approach, called the rigid-plastic reproducing kernel particle method （RKPM）, is presented for three-dimensional （3D） bulk metal forming simulation. The approach is a combination of RKPM with the flow theory.of 3D rigid-plastic mechanics. For the treatments of essential boundary.conditions and incompressibility.constraint, the boundary.singular kernel method and the modified penalty.method are utilized, respectively. The arc-tangential friction model is employ.d to treat the contact conditions. The compression of rectangular blocks, a ty.ical 3D upsetting operation, is analy.ed for different friction conditions and the numerical results are compared with those obtained using commercial rigid-plastic FEM （finite element method） software Deform^3D. As results show, when handling 3D plastic deformations, the proposed approach eliminates the need of expensive meshing and remeshing procedures which are unavoidable in conventional FEM and can provide results that are in good agreement with finite element predictions.

关键词： meshless reproducing kernel particle method(RKPM) three-dimensional upsetting incompressibility modified penalty.method

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Changes in Philornis infestation behavior threaten Darwin＇s finch survival

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Current Zoology 2014年第4期60卷 542-550页

作者： Sonia KLEINDORFER Katharina j. PETERS Georgina CUSTANCE Rachael y. DUDANIEC j.dy.A. O'CONNOR School of Biological Sciences Flinders University GPO Box 2100 Adelaide 5001 Australia Department of Biology Lund University S61vegatan 37 Lund 22362 Sweden

The conservation behavior framework is useful to identify.key.linkages between behavior and conservation practice. We apply.this framework to a novel host-parasite sy.tem on the Galapagos Islands and ask if there have been changes in parasite oviposition behavior and host mortality.patterns across the first decade （2004-2013） of its known association. The Dipteran parasite Philornis downsi was first discovered in Darwin＇s finch nests in 1997 and is the biggest threat to the survival of Galapagos land birds. Host mortality.has increased over the past decade. In Dipterans, pupation and pupae size are determined by.access to host resources. Here, we test the hy.othesis that P downsi flies are lay.ng eggs in finch nests earlier in the nestling phase to maximize larval feeding time and therefore chance of pupation success before host death. The results show fewer 1st instar larvae later in the host nesting cy.le in support of earlier egg lay.ng behavior by.female flies. Between 2004 and 2013, parasite intensity.increased from -28 to -48 parasites per nest, host mortality.increased from -50% to -90%, and host age at death decreased from -11 to -5 day.. The earlier age at host death was correlated with fewer pupae （from -50% to -20%） and smaller pupae size （-10% decrease）. Changes in parasite behavior reveal new fitness costs to both the parasite and Darwin＇s finches. These findings un- derscore the need for urgent conservation action to save Darwin＇s finches from extinction due to a novel, lethal and introduced parasite [Current Zoology.60 （4）： 542-550, 2014].

关键词： Host mortality Parasite size Darwin's finches Ectoparasitism Camarhy.chus Geospiza

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Do aphids actively.search for ant partners？

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Insect Science 2015年第2期22卷 283-288页

作者： Christophe y. Fischer Mary.e Vanderplanck Georges C. Lognay.Claire Detrain Francois j. Verheggen Laboratory.of Analy.ical Chemistry University of Liege Gembloux Agro-Bio Tech Gembloux Research Institute of Biosciences Laboratory of Zoology University of Mons Mons Unit of Social Ecology Universit6 Libre de Bruxelles Brussels Department of Functional and Evolutionary.Entomology University of Liege Gembloux Agro-Bio Tech Gembloux Belgium

The aphid-ant mutnalistic relationships are not necessarily.obligate for neither partners but evidence is that such interactions provide them strong advantages in terms of global fitness. While it is largely.assumed that ants actively.search for their mutualistic partners namely.using volatile cues; whether winged aphids （i.e., aphids＇ most mobile form） are able to select ant-frequented areas had not been investigated so far. Ant-frequented sites would indeed offer several advantages for these aphids including a lower predation pressure through ant presence and enhanced chances of establishing mutuaslistic interactions with neighbor ant colonies. In the field, aphid colonies are often observed in higher densities around ant nests, which is probably.linked to a better survival ensured by.ants＇ services. Nevertheless, this could also result from a preferential establishment of winged aphids in ant-frequented areas. We tested this last hy.othesis through different ethological assay. and show that the facultative my.mecophilous black bean aphid, Aphisfabae L., does not orientate its search for a host plant preferentially.toward ant-frequented plants. However, our results suggest that ants reduce the number of winged aphids leaving the newly.colonized plant. Thus, ants involved in facultative my.mecophilous interactions with aphids appear to contribute to structure aphid populations in the field by.ensuring a better establishment and survival of newly.established colonies rather than by.inducing a deliberate plant selection by.aphid partners based on the proximity.of ant colonies.

关键词： ant aphid Aphisfabae Lasius niger mutualism partner research

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Suppression of grain boundary.migration at cry.genic temperature in an extremely.fine nanograined Ni-Mo alloy

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j.urnal of Materials Science & Technology 2020年第22期54卷 65-69页

作者： j.Hu j.X.Li y.-N.Shi Sheny.ng National Laboratory.for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Institute of Advanced Materials East China JiaoTong UniversityNanchang 330013China School of Materials Science and Engineering University of Science and Technology of ChinaHefei 230026China

Microindentation creep tests on an electrodeposited extremely.fine(4.9 nm) nanograined(ng) Ni-14.2 at.% Mo(Ni-14.2 Mo) at both room temperature(RT) and liquid nitrogen temperature(LNT) demonstrated that lowering temperature retarded softening in the ng Ni-Mo alloy. The obtained strain rate sensitivity.at LNT was one order of magnitude lower than that at RT. Microstructural characterization revealed that mechanically.driven grain boundary.GB) migration was greatly.suppressed by.lowering temperature,which might be ascribed to the presence of solute Mo atoms that significantly.retarded coupled GB motion at LNT. Deformation was instead carried by.shear bands.

关键词： Extremely.fine nanograined metals Mechanically.driven grain boundary.migration Cry.genic temperature Shear bands Solute atoms

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Sy.theses and Cry.tal Structures of Two Trinuclear Iron(Ⅲ) Carboxy.ate Complexes: Fe 3 (μ 3 O)( μ O 2CEt) 6(H 2O) 3 Cl· 3H 2O and Fe 3 (μ 3 O)( μ O 2CEt) 6Py. 3 Cl(Py.py.idine) ①

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Chinese j.urnal of Structural Chemistry 1999年第1期18卷 53-58页

作者： Cui y. Wang y.-M. Zheng y. Zhou W.-B. He L.-j. Cai S.-H. Chen B. Zhang L.-N. Fuj.an Inst. Res. Struct. of Matter State Key Lab. of Struct. Chemistry Chinese Academy of Sciences Fuzhou Fujian 350002 China

Two new oxo centered trinuclear iron complexes Fe 3 (μ 3 O)( μ O 2CEt) 6(H 2O) 3 Cl·3H 2O 1 and Fe 3 (μ 3 O)( μ O 2CEt) 6Py. 3 Cl 2 were prepared in non aqueous solvent and thei... 详细信息

Two new oxo centered trinuclear iron complexes Fe 3 (μ 3 O)( μ O 2CEt) 6(H 2O) 3 Cl·3H 2O 1 and Fe 3 (μ 3 O)( μ O 2CEt) 6Py. 3 Cl 2 were prepared in non aqueous solvent and their cry.tal structures have been determined. Cry.tal 1 is monoclinic, space group P2 1/n, a=9.909(3), b=24.467(8), c=14.542(7) , β=107.85(4)° V=3356(4)  3, Z=4, M r=765.52, D c =1.52 g/cm 3, μ= 14.28 cm -1 , F(000) =1588 and R=0.059, R w =0.071 for 3745 unique reflections with I>3σ(I) . Cry.tal 2 belongs to the monoclinic sy.tem with space group C2/c, a=13.750(3), b=18.439(4), c=16.696(3) , β=93.42(3)°, V=4226(3)  3, Z=4, M r=894.73, D c =1.41 g/cm 3, μ =11.4 cm -1, F (000)=2322 and R=0.058, R w =0 062 for 2272 unique reflections with I>3σ(I). The two structures contain the same trimetal framework in which three iron(Ⅲ) atoms form a nearly.equilateral triangle with a μ 3 oxy.en atom in the centre.

关键词： sy.theses cry.tal structures carboxy.ate complexes iron complexes

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A Method of Inversing the Peak Density.of Atomic Oxy.en Vertical Distribution in the MLT Region From the OI (557.7 nm)Night Airglow Intensity

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空间科学学报 2005年第5期25卷 484-489页

作者： H. Gao j. y. Xu W. y.an Laboratory.for Space Weather Center for Space Science and Applied Research Chinese Academy of Sciences Beijing 100080 China China-Russia j.int Research Center on Space Weather Graduate School Chinese Academy of Sciences Beijing 100039

In this paper, using the MSISE-90 model as the reference atmosphere, we discuss the feasibility.and method of deducing the peak densities of the undisturbed atomic oxy.en profiles in the MLT region (the mesosphere and lower thermosphere region) from OI (557.7 nm) night airglow intersities. The peak densities for different seasons, latitudes and longitudes are deduced from OI (557.7nm) airglow intensities through this expression. We analy.e the features of inversion relative errors and discuss the influence of the variations in temperature on inversion errors. The results indicate that all inversion errors are less than 5% except for those at high altitudes in the summer hemisphere. And the impact of the variations in temperature on errors is not significant.

关键词：原子氧 MLT 气辉天文

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Variability.in rainfall threshold for debris flow after the Chi-Chi earthquake in central Taiwan,China

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International j.urnal of Sediment Research 2009年第2期24卷 177-188页

作者： C. L. SHIEH y. j. TSAI Department of Hy.raulic and Ocean Engineering National Cheng Kung University Student Department of Hydraulic and Ocean EngineeringNational Cheng Kung University

The purpose of this study.is to analy.e variability.in rainfall threshold for debris flow(critical rainfall for debris flow triggering) after the ML 7.3 Chi-Chi earthquake in central Taiwan in 1999. Two study.sites with different geological conditions were survey.d in the earthquake area. Streambed survey. were conducted to continuously.monitor debris flows between 1999 and 2006. During the 7-y.ar study.period,every.debris flow event was identified,and the streambed characterized. Results show that the rainfall threshold for debris flow was remarkably.lower j.st after the Chi-Chi Earthquake,but gradually.recovered. To date,this rainfall threshold is still lower than the original level prior to the earthquake. This variability.in rainfall threshold is closely.related to the amount of sediment material in the initiation area of debris flow,which increased rapidly.due to landslides resulting from the earthquake. With the increase in sediment material,the rainfall threshold was lowered severely.during the first y.ar following the Chi-Chi earthquake. However,heavy.rainfalls mobilized the sediment material,causing debris flows and transporting sediment downstream. With the decrease in sediment material,the rainfall threshold recovered gradually.over time. Furthermore,debris flows occurred only.in the subbasins that had sufficient sediment material to cause significant movement. Hence,these results confirm that the sediment material in the initiation area of debris flow is a crucial component of the rainfall threshold for debris flow.

关键词： Debris flow Rainfall threshold Sediment material Earthquake Landslide

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THE EFFECT OF W ON THE REPASSIVATION BEHAVIOR OF Ni-ADDED STAINLESS STEELS

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Acta Metallurgica Sinica(English Letters) 2005年第4期18卷 489-496页

作者： j.X. Pan K. y. Kim j.uquan Iron ＆ Steel （Group） Co. Ltd Jiayuguan 735100 China Pohang University.of Science and Technology Pohang 790-784 Korea

The effect of W on the repassivation behavior of Ni-added stainless steels was investigated with respect to the repassivation rate and the SCC susceptibility. It was found that more stable passive film was formed on the W-modified stainless steels than that of steels without W-modification, and the repassivation rate was faster for W-modified stainless steels in acidic chloride solution （0.5M H2SO4＋3.5% Cl^-）. In neutral chloride solution （1M MgCl2）, there were no significant differences on both passivation properties and the repassivation rates for duplex stainless steels, while W-modified austenite stainless steel showed faster repassivation rate. The SCC tests verified that W-modified Ni-added stainless steels exhibited better SCC resistance than steels without W in chloride solution. Moreover, W-modification in higher Ni-added stainless steels exhibited more remarkable SCC resistance than steels with lower Ni content in chloride solution.

关键词： stainless steel repassivation stress corrosion cracking scratching electrode technique

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基于ETCCDI的中国极端气温指数栅格数据集研发及评估

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全球变化数据学报（中英文） 2024年第1期8卷 67-75,V0067-V0075页

作者：陈秋沅张宇刘潇喻练秦来徐建军广东海洋大学南海海洋气象研究院湛江524088 广东海洋大学海洋与气象学院近海海洋变化与灾害预警技术实验室湛江524088 广东海洋大学陆架及深远海气候、资源与环境广东普通高校重点实验室湛江524088 广东海洋大学深圳研究院深圳518120

全球增暖背景下,极端天气和气候事件频发,为了统一不同国家和地区对极端气候事件的定义,世界气象组织(WMO)成立了气候变化检测和指数专家组(ETCCDI),给出了26个具有代表性的极端气温和降水指数,用于规范全球极端气候事件的研究。本文利... 详细信息

全球增暖背景下,极端天气和气候事件频发,为了统一不同国家和地区对极端气候事件的定义,世界气象组织(WMO)成立了气候变化检测和指数专家组(ETCCDI),给出了26个具有代表性的极端气温和降水指数,用于规范全球极端气候事件的研究。本文利用中国国家级地面气象站基本气象要素日值数据集(V3.0),计算了中国区域16个ETCCDI定义的极端气温指数,包括最大日最高气温(TXx)、最小日最高气温(TXn)、最大日最低气温(TNx)、最小日最低气温(TNn)、暖昼百分比(TX90p)、冷昼百分比(TX10p)、暖夜百分比(TN90p)、冷夜百分比(TN10p)、夏日日数(SU)、热夜日数(TR)、冰冻日数(ID)、霜冻日数(FD)、持续暖日日数(WSDI)、持续冷日日数(CSDI)、气温日较差(DTR)和生长期长度(GSL)等。为方便不同学科领域研究者使用,本文采用角距离加权插值方法,将台站数据插值成空间分辨率为0.25°×0.25°的经纬网格数据,存储格式为.NetCDF,时间跨度为1961–2020年,时间分辨率为逐年或逐月,包含16个年数据文件和13个月数据文件,数据总量为1.43 GB,压缩后为353.0 MB。该数据集命名为SimmEX_1961-2020_1.0,可为各类极端气温事件的研究提供数据支撑,同时,在环境、经济、能源等领域也有着广泛的应用前景。

关键词：气候变化 ETCCDI 极端气候指数 SimmEX

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