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Observations and modeling of the ionospheric behaviors over the east Asia zone during the 2. July 2.09 solar eclipse

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Observations and modeling of the ionospheric behaviors over ...

中国科学院地质与地球物理研究所第十届(2.10年度)学术年会

作者： Huijun Le,Libo Liu,Feng ding,Zhipeng Ren,Yiding Chen,Weixing Wan, Baiqi Ning,Guirong Xu,Min Wang,Guozhu Li,Bo Xiong,and Lianhuan Hu 1 beijing National Observatory of Space Environment,institute of geology and Geophysics,chinese academy of sciences,beijing,china. 2 Also at Sate Key Laboratory of Space Weather,chinese academy of sciences,beijing,china. 3 institute of Heavy Rain,china Meteorological Administration, Wuhan,china. 4 institute of Earthquake Science,china Earthquake Administration, beijing,china. 5 Graduate School of the chinese academy of sciences,beijing,china.

[1]The longest total solar eclipse during the 2.st century with a maximum duration of 6 min and 39 s occurred in South and East Asia on 2. July *** TEC data from four GPS stations in the total eclipse region(around 30°N) from 105°E to 135°E are used to study the variation in *** profiles of electron density from Formosa3/Cosmic satellites are used to study the height dependence of the electron density *** also modeled the eclipse effects on the ionosphere by an ionospheric *** the observations from F3/C and the modeled results show that there is an overall decrease in the electron density below F2.region,with the largest relative decrease occurring at Fl *** TEC observations show the delay time of the largest TEC decrease at the total eclipse region with regard to the maximum obscuration is less than five minutes and smaller than what is estimated from the time constant of the plasma loss rate at the F2.peak altitude although main contribution to TEC comes from the plasma density in the F2.*** modeling study shows that,due to the large plasma flux from topside ionosphere to F2.layer,the TEC response around 30°N is mainly due to the electron density response at low altitudes(E and Fl region,2.0 km below) where the time delay of electron density response is very short(less than 4 min).Thus the time delay of TEC response would also be short as observed by GPS TEC.

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A Hamiltonian framework for wavefield depth continuation in seismic imaging

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A Hamiltonian framework for wavefield depth continuation in ...

中国科学院地质与地球物理研究所2.07学术年会

作者： jing-Bo Chen~*,Hong Liu,Deng-Guo Zhou institute of {2. and Geophysics,chinese academy of sciences,P.O.Box 982.,beijing 10002.,china

Symplectic algorithms have seen a successful application in astronomy,fluid dynamics,quantum mechanics and many other ***,these symplectic algorithms usually refer to evolution of the solution along the time direction,and in seismic imaging wavefield is often continued along the depth direction.A Hamiltonian framework for wavefield depth continuation in seismic imaging is presented in this *** framework is established for both two-way and one-way wave equations and provides a new methodology for constructing migration *** Hamiltonian viewpoint lends itself to applications of promising structure-preserving algorithms to seismic imaging.

关键词： Seismic imaging Hamiltonian structure Symplectic algorithm Depth continuation

Empirical relationship between leaf wax n-alkaneδD and altitude in the Wuyi,Shennongjia and Tianshan Mountains,china:Implications for paleoaltimetry

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Empirical relationship between leaf wax n-alkaneδD and alti...

中国科学院地质与地球物理研究所第11届（2.11年度）学术年会

作者： Pan Luo~(a,*),Ping’an Peng~b,Gerd Gleixner~c,Zhuo Zheng~d,Zhonghe Pang~a,zhongli ding~a a Key Laboratory of Cenozoic {2. and Environment,institute of {2. and Geophysics,chinese academy of sciences,beijing 10002.,china b Guangzhou institute of Geochemistry,chinese academy of sciences,Guangzhou 510640,china c Max Planck institute for Biogeochemistry,Jena 07745,Germany d Department of Earth sciences,Sun Yat-sen University,Guangzhou 5102.5,china

Estimating past elevation not only provides evidence for vertical movements of the Earth’s lithosphere,but also increases our understanding of interactions between tectonics,relief and climate in geological history. Development of biomarker hydrogen isotope-based paleoaltimetry techniques that can be applied to a wide range of sample types is therefore of continuing *** we present leaf wax-derived n-alkane 8D (δD) values along three soil altitudinal transects,at different latitudes,in the Wuyi,Shennongjia and Tianshan Mountains in china,to investigateδD gradients and the apparent fractionation between leaf wax and precipitation(ε). We find that soilδD track altitudinal variations of precipitation 8D along the three transects that span variable environment conditions and vertical vegetation *** empiricalδD-altitude relation is therefore established in which the averageδD lapse rate of - 2.2.±0.38‰/100 m is suitable for predicting relative paleoelevation change(relative uplift).The application of this empirical gradient is restricted to phases in the mountain uplift stage when the atmospheric circulation had not distinctly changed and to when the climate was not *** empiricalδD-latitude-altitude formula is also calculated:δD = 3.483LAT - 0.02.7ALT - 2.1.5, which gives the preliminary spatial distribution pattern ofδD in modern china. Mean value ofε in the extreme humid Wuyi Mountains is quite negative(-154‰),compared to the humid Shennongjia(-12.‰) and the arid(but with abundant summer precipitation) Tianshan Mountains(- 130‰), which suggests aridity or water availability in the growing season is the primary factor controlling soil/ sedimentε.Along the Tianshan transects,values ofε are speculated to be constant with altitude;while along the Wuyi and Shennongjia transects,ε are also constant at the low-mid altitudes,but become slightly more negative at high altitudes which could be attributed to overestimates of precipitation 8D or the vegetation

关键词： leaf wax n-alkane deuterium/hydrogen isotopic ratio inverse altitude effect paleoelevation paleoaltimetry

Depth of coesite-bearing eclogite formation, Dabie UHPM zone, china, based on structure stress correction

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Depth of coesite-bearing eclogite formation, Dabie UHPM zone...

地壳深部压力状态与地质作用学术研讨会

作者： Lü Guxian, Chen jing, ding Tiping, Li Xiaobo, Wang Fangzheng and Liu Ruixun {2. of Geomechanics, beijing, 100081, china Electron Microscopy Laboratory, Peking University, beijing, 100871, china Open Research Laboratory of Isotope geology, chinese academy of Geological sciences, beijing 100037, china {2. of Geological Information, beijing, 100037, china china University of Geosciences, Wuhan, Hubei, 430074, china Department of geology, Peking University, beijing, 100871, china

＜正＞ Plastic deformation of garnet in coesite-bearing eclogite, quartz eclogite and garnet amphibolite of the ultra-high pressure metamorphic（UHPM） complex in Yingshan County, Dabie Mountains, has been studied by transmission electron microscopy （TEM）. Garnets have undergone ductile deformation under eclogite and amphibolite facies conditions. Garnet microstructures vary greatly with the dislocation density of the garnet being lower in coesite-bearing eclogite is than that in garnel *** generated by strong tectonic movement were an important component of the total pressure causing the formation of eclogite in the Dabie UHPM zone. The three-dimensional tectonic principal stresses and additional tectonic stress-induced hydrostatic pressure [Ps=-（σ1+σ2.σ3）/3] are reconstructed according to the differential stress and strain ratio （a） of garnet in minor coesite-bearing eclogite of Yingshan county. Then the gravity-induced hydrostatic pressure （PG） is calculated through P minus PS, where P is estimated to be 2.8 GPa based on the quartz-coesite geobarmeter. Therefore, the thickness of the rock column overlying the coesite-bearing eclogite in Yingshan county is determined to be ≥2.09-32.11 km. this estimation is significantly different from the previous estimation of ≥100km obtained solely by considering the weight/specific weight ratio （W/SW）.It gives also a proper explanation to the puzzle that no tracer of addition of mantle-derived material has been found in the Dabie UHPM zone during the process of UHPM, although a number of researches claim that this process was taking place at depth of the mantle （≥100 km） . It is concluded that attention should be paid to the additional tectonic stress-induced hydrostatic pressure in the study of UHPM zones.

关键词： Dabie UHPM zone formation depth additional tectonic stress-induced hydrostatic pressure coesite-bearing eclogite tectonic physicochemistry plastic deformation garnet

国产MOCVD-YBCO带材高温超导线圈研制与磁场温度特性研究

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物理学报 2018年第6期67卷 250-257页

作者：丁发柱张京业谭运飞陈治友董泽斌张慧亮商红静许文娟张贺屈飞高召顺周微微古宏伟中国科学院电工研究所北京100190 中国科学院应用超导重点实验室北京100190 中国科学院大学北京100049 中国科学院强磁场科学中心合肥230031

超导磁体的场强与超导材料的载流能力、磁体口径和低温环境有密切关系.为了在中高温区域实现高磁场强度的超导磁体,采用国产第二代高温超导带材,成功绕制出内直径为100 mm的高温超导线圈.该超导线圈在77,65,55和46 K不同温区下进行了性... 详细信息

超导磁体的场强与超导材料的载流能力、磁体口径和低温环境有密切关系.为了在中高温区域实现高磁场强度的超导磁体,采用国产第二代高温超导带材,成功绕制出内直径为100 mm的高温超导线圈.该超导线圈在77,65,55和46 K不同温区下进行了性能测试,其最大运行电流分别为65,147,2.7和338 A,对应的中心磁场强度分别为0.78,1.77,3.1和4.08 T.所研制的超导线圈的中平面上磁场基本一致.

关键词：高温超导磁体钇钡铜氧带材

准噶尔盆地西北缘三叠系克拉玛依组扇三角洲沉积微相特征——以W16井区为例

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天然气地球科学 2011年第4期22卷 602-609页

作者：吴志雄杨兆臣丁超史基安张顺存张杰中国科学院油气资源研究重点实验室甘肃兰州730000 中国科学院研究生院北京100049 新疆油田公司风城油田作业区新疆克拉玛依834000

通过岩心观察、薄片分析、测井和录井资料分析,对准噶尔盆地西北缘W16井区三叠系沉积相进行了精细的研究。结果表明:W16井区克拉玛依组主要为扇三角洲前缘亚相沉积,发育的微相主要为水下分流河道、分流河道间微相,且湖进—湖退变化迅速... 详细信息

通过岩心观察、薄片分析、测井和录井资料分析,对准噶尔盆地西北缘W16井区三叠系沉积相进行了精细的研究。结果表明:W16井区克拉玛依组主要为扇三角洲前缘亚相沉积,发育的微相主要为水下分流河道、分流河道间微相,且湖进—湖退变化迅速。水下分流河道砂体为骨架储集砂体。同时,对克拉玛依组各个小层沉积微相的时空展布特点进行了分析,认为沉积微相对油气聚集具有明显的控制作用,水下分流河道微相砂体是克拉玛依组主要的油气聚集层,该项研究成果不仅为该区油藏储量计算提供了依据,而且为该油田的开发提供了储集砂体骨架分布的基础图件。

关键词：准噶尔盆地克拉玛依组沉积微相三叠系

A separable-kernel decomposition method for approximating the DSR continuation operator

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A separable-kernel decomposition method for approximating th...

中国科学院地质与地球物理研究所2.07学术年会

作者： jing-Bo Chen,Hong Liu,and Zhi-Fu Zhang chinese academy of sciences.{2. of geology and Geophysics,P.O.Box 982.,beijing 10002.,china.

We develop a separable-kernel decomposition method for approximating the double-square-root(DSR) continuation operator in one-way migrations in this *** new approach is a further development of separable approximations of the single-square-root(SSR) *** separable approximation of the DSR operator generally involves solving a complicated nonlinear system of integral *** of solving this nonlinear system directly,our new method consists of repeatedly applying the separable-kernel technique developed for the two-variable SSR operator to the multivariable DSR *** experiments demonstrate the efficiency of the proposed *** illustrate the fast convergence of the obtained separable approximation. We also demonstrate the capability of this novel approximation for imaging an area with geologic complexities through synthetic data.

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水资源系统工程的理论框架探讨

系统工程理论与实践 2004年第2期24卷 130-137页

作者：金菊良魏一鸣丁晶付强合肥工业大学土建学院安徽合肥230009 中国科学院科技政策与管理科学研究所北京100080 四川大学水电学院四川成都610065

　作为一门新兴交叉综合性工程技术学科,水资源系统工程在人口、资源、环境、经济与社会区域可持续发展战略研究中具有重要意义.根据水资源系统工程的基本概念,指出水资源系统工程的实质就是处理各种水资源系统问题的方法论,据此提出了... 详细信息

　作为一门新兴交叉综合性工程技术学科,水资源系统工程在人口、资源、环境、经济与社会区域可持续发展战略研究中具有重要意义.根据水资源系统工程的基本概念,指出水资源系统工程的实质就是处理各种水资源系统问题的方法论,据此提出了水资源系统工程新的理论框架,它由水资源系统优化方法、建模方法、预测方法、模拟方法、评价方法和决策分析方法组成.该理论框架在各种应用系统工程研究中具有参考应用价值.

关键词：水资源系统工程方法论理论框架

THE GEOCHEMISTRY CHARACTERISTICS OF BLUESCHIST IN THE GANGMAR AREA, QIANGTANG BLOCK, TIBET

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地学前缘 2000年第S1期7卷 191-191页

作者： Deng Xiguang 1, ding Lin 1, Liu Xiaohan 1,An Yin 2. Paul A.Kapp 2. Michael A.Murphy 2. Craig E.Manning 2.WT5,5”BX](1 institute of {2. and Geophysics, chinese academy of sciences, P.O.Box 982., beijing 10002.,china 2.Department of Earth an

The Qinghai—Xizang (Tibet) Plateau was assembled by the successive accretion of continental and arc terranes to Asia during the Palaeozoic, Mesozoic and early Tertiary. From north to south, the Plateau was divided into four terranes (from north to south): Songpan\|Garze, Qingtang, Lhasa and India terranes. The Qiangtang terrane was divided into two parts by Chabu\|Shuanghu suture: Northern Qiangtang and Southern Qiangtang blocks. It was believed that there is a suture as Palaeotethyan suture between the two blocks from Lungmu lake to Chabu, to Shuanghu, to Langcangjiang, but some geologists opposited this opinion, such as Wang Chengshan et al.(1987) and Deng Wanming et al.(1996). The blueschists that bear the typical glaucophane were found in the Gangmar Area in summer of 1997. The blueschists consist of glaucophane, crossite, phengite, actinolite, epidote, sphene ,rutile, and so on. Blueschists show nappe structures in enclosing rocks, and thrust over Tertiary from north to *** age of blueschist is 2.5～2.5Ma which stand for the metamorphic age of blueschist. The geochemical contents of blueschists are the following: SiO\-2.is 45 37%～53 82., Na 2.>K 2., K 2.+Na 2. are 3 72.～7 61%, Na 2./K 2. is 1 70～19 67, MnO is 0 16%～0 2.%, FeO+Fe 2. 3 are 11 12.～14 2.%, TiO 2.is 2.34%～4 2.%, P 2. 5 is 0 34%～1 03%. From the contents, SiO 2.is inverse relation with K 2.+Na 2., K 2. and FeO+Fe 2. 3. In the SiO 2.|K 2.+Na 2. diagram, the blueschists fall in the field of Alkali basalt; in the TiO 2.|MnO(10\|P 2. 5×10 triangular diagram, these plot within the Ocean Island Basalts(OIB) field. The whole REE content is (117 03～390 97)×10 -6 , LREE/HREE is 5 05～9 80, the REE diagram shows the feature that LREE is rich and HREE is depleted, this is similar to the OIB. In the spidergram of trace elements show the same characterristics as the OIB. Meanwhile, the trace elements ratios, such as Ba/Nb, La/Nb, Nb/Th, Nb/Y, Zr/Y, Zr/Nb, Hf/Sm, Ta/Hf, Nb/Ta, Nb/U, suggest the tectonic setting

关键词： Geochemistry Characteristics Ocean Island Basalt Paleo\|T ethyan Suture Blueschist Gangmar Area Tibet