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Afterglow from GRB 070610/swift J195509.6+261406:An explanation using the fireball model

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science china(Physics,Mechanics & Astronomy) 2010年第S1期53卷 94-97页

作者： KONG siWei & HUANG YongFeng department of Astronomy,nanjing university,nanjing 210093.china 1. department of Astronomy Nanjing University Nanjing 210093 China

GRB 070610,which is also named swift J195509.6+261406,is a peculiar Galactic transient with significant variability on short timescales in both X-ray and optical light *** possible explanation is that GRB 070610/swift J195509.6 + 261406 is a soft gamma-ray repeater(sGR) in our ***,we use the fireball model,which is usually recognized as the standard model of gamma-ray burst(GRB) afterglows,and the energy injection hypothesis to interpret the X-ray and optical afterglow light curves of GRB 070610/swift J195509.6 + *** is found that the model is generally consistent with observations.

关键词： gamma-ray bursts soft gamma-ray repeaters outflows

The Comparable structure of Exchange Rings

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Acta Mathematica sinica,English series 2002年第1期18卷 89-94页

作者： CHEN Huan Yin QIN Hou Rong department of Mathematics. Hunan Normal university. Changsha 410006. P. R. china department of Mathematics. nanjing university. nanjing 210093. P. R. china department of Mathematics Hunan Normal University Changsha P. R. China department of Mathematics Nanjing University Nanjing P. R. China

We obtaim a new substitution for modules over exchange rings satisfving related compara- bilitv. Also we investigate the structure of modules over exchange rings satisfying power comparability and provide a new class ... 详细信息

关键词： Related comparability Power comparability Exchange ring

Magnetic mineralogy of the Hongqiling Cu-Ni sulphide deposit: Implications for ore genesis

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Progress in Natural science:Materials International 2007年第10期17卷 1192-1198页

作者： Xi Aihua1,2, Ge Yuhui1, Cai Yuanfeng2 and Zhang Xuefeng3.1. Faculty of Resources & Environment, southwest Petroleum university, Chengdu 610500, china 2. state Key Laboratory for Endogenic Metal Deposit Research, nanjing university,{3. 3. department of Natural Resources & Technology Information, china university of Petroleum, Beijing 102249, china) Faculty of Resources & Environment Southwest Petroleum University Chengdu 610500 China state Key Laboratory for Endogenic Metal Deposit Research Nanjing University Nanjing 210093 China department of Natural Resources & Technology Information China University of Petroleum Beijing 102249 China

Pyrrhotite is one of the common ore minerals in Cu-Ni sulphide deposits, but only monoclinic pyrrhotite is ferromagnetic at room temperature. X-ray and EPA analyses reveal that most pyrrhotite forming sideronitic texture in the Hongqiling Cu-Ni sulphide deposit is monoclinic, but that in the massive ore is a mixture of monoclinic and hexagonal pyrrhotites. Differential thermal and magnetic- thermogravimetric analyses of massive ore indicate a magnetic transition and heat absorption at 3.3., suggesting that this temperature is the thermomagnetic and phase transition point of pyrrhotite. For massive pyrrhotite ores heated at 400oC for 3. h and then quenched by cool water, the monoclinic pyrrhotite (mpo) transforms completely into the hexagonal pyrrhotite (hpo). However, all the pyrrhotites resulting from slow cooling of the sample in air are mpo. These results indicate that transformation between hpo and mpo depends upon the cooling rate. Therefore, massive ores in this deposit might have been formed via rapid cooling of ore melts. On the other hand, it is significant to study the effect of the ratio of the magnetite in total ores on the genesis of magmatic Cu-Ni suphide deposits.

关键词： pyrrhotite magnetite genesis of Cu-Ni sulphide deposit Hongqiling.

Time of impact of fragment P2 of comet sL 9 on Jupiter

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Chinese science Bulletin 1997年第5期42卷 396-398页

作者： ZHOU Hongnan,QIAN Bochen, HUANG Keliang and LI Qibin1. department of Astronomy, nanjing university, nanjing 210093. china 2. shanghai Observatory, Chinese Academy of sciences, shanghai 20003., {3. 3. Physics department, nanjing Normal university, nanjing 210097, {3. 4. Beijing Astronomical Observatory, Chinese Academy of sciences, Beijing 100080, {3. department of Astronomy Nanjing University Nanjing China shanghai Observatory Chinese Academy of Sciences Shanghai China Physics department Nanjing Normal University Nanjing China Beijing Astronomical Observatory Chinese Academy of Sciences Behijing China

FROM 1994-07-16 to 1994-07-22, 21 fragments of comet sL 9 impacted against Jupiter in succession. During the impact period the impact of fragments D, E, K, N, P2 and s was observed in china. We used a 1.56-m telescope with the CCD camera of shanghai Observatory to monitor Jupiter and its Galilean satellites, obtaining 1000 high-quality images at B, V, I wave bands. Our data on optical wave bands are rather complete and valuable in the world. specially, we got some images of Jupiter, Io and Europa in the impact time of fragment P2 impacting against Jupiter. This will help us understand the precise time, position, depth and energy of the P2’s collision. In this note, we report the impact time of fragment P2 of comet sL 9 and Jupiter. since the impact of comet sL 9 was expected to take place on the side of Jupiter

关键词： comet comet shoemaker-Levy 9 impacting against Jupiter impact time.

Zircon sHRIMP U-Pb geochronology and petrogenesis of the plagiogranites from the Lagkor Lake ophiolite,Gerze,Tibet,china

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Chinese science Bulletin 2007年第5期52卷 651-659页

作者： ZHANG YuXiu1,2, ZHANG KaiJun1,3. LI Bing1,2, WANG Yang1,2, WEI QingGuo1,2 & TANG XianChun1,2 1 Key Laboratory of Marginal sea Geology, Guangzhou Institute of Geochemistry, Chinese Academy of sciences, Guangzhou 510640, china 2 Graduate university, Chinese Academy of sciences, Beijing 10003., china 3.{3. of earth sciences, nanjing university, nanjing 210093. china Key Laboratory of Marginal sea Geology Guangzhou Institute of GeochemistryChinese Academy of Sciences Guangzhou 510640 China

地关系与 petrographical 一起， petrological ，和 geochemicalcharacteristics ，和锆石人口，显示从在 Bangong-Nujiang 缝术地区的 Lagkor Lakeophiolite 的 plagiogranites (～ Gerze 县的 20 km 南方，中央西藏，中国)，由在海洋的外壳的运输期间的可锻的砍源于含水的斑粝岩的 anatexis 。因此，这种 plagiogranite 比传播海洋的外壳晚对或很少同时代。锆石虾 166 ±使 2.5 妈变老因为 plagiogranites 显示海洋的盆在中间的侏罗记在 Bangong-Nujiang 地区的西方的部分存在。

关键词：西藏改则县拉果错湖泊蛇绿岩斜长花岗岩锆sHRIMP U-Pb地质年代岩石成因

Distribution characteristics of terrestrial heat flow density in Jiyang depression of shengli Oilfield, East china

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science china earth sciences 2004年第9期47卷 804-812页

作者： GONG Yuling1,2, WANG Liangshu1, LIU shaowen1, LI Cheng1, HAN Yongbing1, LI Hua1, LIU Bo1 & CAI Jingong3.1. department of earth sciences, nanjing university,{3. 2. department of Exploration and Information Technology of East china Institute of Technology, Fuzhou 3.4000, china 3. earth science Institution of shengli Oilfield, Dongying 257015, china department of earth sciences Nanjing University Nanjing 210093 China department of Exploration and Information Technology of East china Institute of Technology Fuzhou 344000 China earth science Institution of shengli Oilfield Dongying 257015 China

Based on the geo-temperature data of 13.systematically continuous temperature log curves and 700 testing oil boreholes in Jiyang depression, shengli Oilfield, and the measured thermal conductivities of 47 rock samples, the terrestrial heat flow densities of 114 boreholes of Jiyang depression and its surrounding areas are determined, including 13.of those data derived from systemically continuous temperature logging. The results show that Jiyang depression has a relatively high background heat flow with an average value (65.8 5.4) mW/m2. The lateral variation of heat flow in basin has negative correlation with basement depth. Moreover, heat flow of uplift areas with shallower basement is high, so are those of regions with volcanic rocks, and those of depression areas with deep basement are relatively low. The heat flow densities of different structural units of Jiyang depression can be summarized as follows: The average heat flow value of Zhanhua sag is (67.4 5.3. mW/m2, higher than that of the whole basin, that of Dongying sag is (66.0 6.1) mW/m2, and that of Chezhen sag is (65.1 3.7) mW/m2. It is apparent that these latter two values are approximate to the average value of the whole Jiyang depression, while the average value of Huimin sag is (63.65.0) mW/m2, lower than that of the whole basin. In fact, the basement depth and the distribution framework of uplift and depression areas are all controlled by the process of lithosphere extension. In addition, the distribution of volcanic rocks in basin is also relatively close to this extension geodynamic process. In summary, the distribution characteristics of terrestrial heat flow of Jiyang depression is determined by the Cenozoic tectono-thermal events of this region.

关键词： Jiyang depression, terrestrial heat flow, thermal conductivity.

A model for the optical flares from the Galactic transient sWIFT J195509+261406

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science china(Physics,Mechanics & Astronomy) 2010年第S1期53卷 91-93页

作者： XU Ming & HUANG YongFeng department of Astronomy,nanjing university,nanjing 210093.china 1. department of Astronomy Nanjing University Nanjing 210093 China

The Galactic hard X-ray transient sWIFT J195509+261406 was first observed as gamma-ray burst GRB *** 3.days after the burst,more than forty optical flares had been ***,we propose that this peculiar event should be associated with a white *** hard X-ray burst itself may be triggered by a collision between two planets orbiting the white *** cracked fragments produced in the collision then fell onto the surface of the white dwarf over several days,giving birth to the observed optical flares via cyclotron *** model can satisfactorily explain the basic features of the observations.

关键词： gamma-ray bursts white dwarfs cyclotron radiation

On the Conditions of a Center and General Integrals of Quadratic Differential systems

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Acta Mathematica sinica,English series 2001年第2期17卷 229-236页

作者： Wei Yin YE department of Mathematics. nanjing Normal university. nanjing 210097, P. R. china Yan Qian YE department of Mathematics. nanjing university, nanjing 210093. P. R. china department of Mathematics Nanjing Normal University Nanjing 210097 P. R. China department of Mathematics Nanjing University Nanjing 210093 P. R. China

We give the general integral of quadratic differential system with center in two cases under the Chinese classification.

关键词： Quadratic differential system Center General integral

structural properties of GaN(0001) epitaxial layers revealed by high resolution X-ray diffraction

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science china(Physics,Mechanics & Astronomy) 2010年第1期53卷 68-71页

作者： XIE ZiLi 1,2,3. ZHOU YuanJun 1 , sONG LiHong 1,2 , LIU Bin 1 , HUA XueMei 1,2 , Xiu XiangQian 1 , ZHANG Rong 1,2,3.& ZHENG YouDou 1,2,3.1 Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials and department of Physics, nanjing university, nanjing 210093. china 2 {3. National Laboratory of Microstructures, nanjing 210093. china 3.NJU-Yangzhou Institute of Opto-electronics, Yangzhou, 225001, china 1. Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials and department of Physics Nanjing University Nanjing 210093 China2. Nanjing National Laboratory of Microstructures Nanjing 210093 China3. NJU-Yangzhou Institute of Opto-electronics Yangzhou 225001 China

High-resolution X-ray diffraction has been used to analyze GaN(0001) epitaxial layers on sapphire substrates. several structural properties of GaN, including the lattice constants, strains, and dislocation densities are revealed by the technique of X-ray dffraction (XRD). Lattice constants calculated from the omega/2theta scan are c=0.5185 nm and a=0.3.57 nm. Also, the in-plane strain is -1.003., while out of the plane, the epitaxial film is almost relaxed. several methods are used to deduce the mosaicity and dislocation density of GaN, showing that the edge type dislocations are the overwhelming majority.

关键词： GaN XRD dislocation epitaxial