Effect of thermal conduction and radiation on the dynamics of a flaring coronal loop     

S. T. Wu  L. C. Kan  Y. Nakagawa  E. Tandberg-Hanssen 《Solar physics》1981,70(1):137-148

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自适应主分量提取算法及应用     

刘保童  朱光明 《物探与化探》2005,29(5):452-454

介绍了神经网络中的自适应主分量提取（APEX）算法的实现步骤,并首次将它用在地震数据处理中.通过对地震记录进行正交分解和特征提取,可消除噪声.模型计算和实际资料处理结果表明了该方法的有效性.  相似文献   

地球物理方法在中国油气资源战略选区中应用的可能性——以藏北羌塘盆地为例     

姜修道  朱光明孙渊 《地质通报》2006,25(9):1196-1200

简要回顾了地球物理方法技术在国内几个油田发现过程中的作用.针对中国油气资源战略选区中普遍存在的方法技术问题,以羌塘盆地为例,进行了较为全面深入的剖析.通过对已有资料和成果的分析,认为羌塘盆地实现战略发现的时机已经成熟.而要实现战略发现,目前亟待解决的问题是打参数井、圈定局部构造和寻找合适的方法技术.鉴于羌塘盆地特殊的自然环境和地质条件,提出了高精度大地电磁法、自然电场法、特殊条件下的地震勘探、井地联合地震勘探等关键技术.具体的工作部署痧是:查明有利区带中最有利的局部构造和构造部位,在最有利的构造部位实施参数井钻探,围绕参数井开展地质、地球物理勘探与综合研究.这些技术和方法的应用有望使羌塘盆地的油气勘探工作迈上新台阶.  相似文献   

Spatial and temporal evolution of arc volcanism in the northeast Honshu and Izu‐Bonin Arcs: Evidence of small‐scale convection under the island arc?     

Satoru  Honda  Takeyoshi  Yoshida  Kan  Aoike 《Island Arc》2007,16(2):214-223

Abstract   Arc volcanism of the past 10 my in the northeast Honshu and Izu-Bonin Arcs shows several notable features. In the northeast Honshu Arc, the spatial distribution of volcanism exhibits several clusters elongated nearly perpendicular to the arc and the possible migration of volcanism from the back-arc side to the volcanic front side, at least, during the past 5 my. The pattern of clusters seems to have flip-flopped around 5 Ma. In the Izu-Bonin Arc, there are a series of across-arc seamount chains, in which volcanic activity occurred from ca 17 Ma to ca 3 Ma, similar to the clusters of the northeast Honshu Arc, although the recent active rifting occurs almost parallel to the arc. On the basis of studies of numerical modeling, these features might be explained, at least qualitatively, by the small-scale convection under the island arc. Several inferences can be made from our modeling results for the tectonics of the Izu-Bonin Arc. The angle of dip of subducting plate in the Izu-Bonin Arc might have increased. This can explain the disappearance of volcanism along the seamount chains and the recent along-arc volcanism with narrow rifting. The trend of seamount chains, which is oblique to the arc, might not be their intrinsic feature but rather a result of the lateral movement of the back-arc region after their formation. These inferences can be tested by the future detailed morphological and chronological studies of the Izu-Bonin Arc.  相似文献   

青海省祁连县大疙瘩5.0级地震宏观考察          下载免费PDF全文

向光中  吕德徽  李素琴  王多杰  董志平  高博  林彤  陈玉华  党光明 《地震工程学报》1984,6(1):103-105

1983年7月27日青海省祁连县境内发生了一次有感地震,为了验证我们前两年工作中所做的结论,组织了现场考察,并对原仪器震中进行了修订。现将此次考察结果叙述如下: 1.地震参数发震时间:1983年7月27日8时21分  相似文献   

河北大湾锌矿中硫锰矿与闪锌矿的成因关系     

魏绮英  涂勘 《矿物学报》1987,(1)

本文研究了产于河北大湾锌矿床中的硫锰矿,探讨了硫锰矿与闪锌矿的成因关系。由实验结果而认为大湾硫锰矿是从深色高锰闪锌矿中出溶而成的。  相似文献   

Discussion on ‘a note on the perturbation analysis of the mode shapes of torsionally coupled buildings’     

Christopher L. Kan  Anil K. Chopra 《地震工程与结构动力学》1982,10(1):175-176

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南极红酵母AN5的发酵及对海参体成分的影响          下载免费PDF全文

王晓飞  史翠娟  阚光锋  李亮  文华  周婷 《极地研究》2018,30(1):50-56

红酵母是海洋酵母中的常见种类,在水产养殖中常作为微生态制剂。本实验以第22次南极考察从海冰中分离的红酵母AN5为研究对象,对酵母菌的发酵生长条件进行了优化,结果表明,红酵母培养的最佳碳源和氮源分别为2%的糖蜜和0.5%的酵母粉,最适装液量为50 m L/250 mL,摇瓶转速为140 r·min~(–1),培养基初始pH=3.0,20℃下可获得最佳培养,此时酵母发酵密度可达5.81×10~7 cells·mL~(–1)。发酵后测得酵母中水分含量为69.15%,干酵母蛋白质含量为42.00%,多糖含量为32.08%,脂肪含量为0.39%。在幼参养殖过程中以0.3 g(湿重)·m~(–3)水体的用量投喂极地红酵母,养殖2个月后,与对照相比,幼参体内水分和脂肪含量基本没有变化,而蛋白质和多糖含量明显升高。因此,极地红酵母可大量发酵生产,作为微生态制剂应用于海参的养殖中。  相似文献   

海底浅表层沉积物原位声学测量方法探讨   总被引：3，自引：1，他引：2  

邹大鹏  阚光明  龙建军 《海洋学报》2014,36(11):111-119

研究透射式和折射式两类海底沉积声学原位测量方法,通过分析10种海底浅表层沉积物声学原位测量仪器的特征,指出不同声学原位测量技术对沉积物声学特性测量结果的影响。比较黄海海底浅表层沉积声学原位测量数据与实验室测量结果的差异,分析原位声学测量数据普遍小于实验室测量数据的原因,指出原位测量的作用和重要性。探讨指出海底浅表层沉积物原位声学测量所需要配合发展的其他物理性质原位测量技术。  相似文献   

Homogeneous reprocessing of GPS,GLONASS and SLR observations   总被引：3，自引：2，他引：1  

Mathias Fritsche  Krzysztof Sośnica  Carlos Javier Rodríguez-Solano  Peter Steigenberger  Kan Wang  Reinhard Dietrich  Rolf Dach  Urs Hugentobler  Markus Rothacher 《Journal of Geodesy》2014,88(7):625-642

The International GNSS Service (IGS) provides operational products for the GPS and GLONASS constellation. Homogeneously processed time series of parameters from the IGS are only available for GPS. Reprocessed GLONASS series are provided only by individual Analysis Centers (i. e. CODE and ESA), making it difficult to fully include the GLONASS system into a rigorous GNSS analysis. In view of the increasing number of active GLONASS satellites and a steadily growing number of GPS+GLONASS-tracking stations available over the past few years, Technische Universität Dresden, Technische Universität München, Universität Bern and Eidgenössische Technische Hochschule Zürich performed a combined reprocessing of GPS and GLONASS observations. Also, SLR observations to GPS and GLONASS are included in this reprocessing effort. Here, we show only SLR results from a GNSS orbit validation. In total, 18 years of data (1994–2011) have been processed from altogether 340 GNSS and 70 SLR stations. The use of GLONASS observations in addition to GPS has no impact on the estimated linear terrestrial reference frame parameters. However, daily station positions show an RMS reduction of 0.3 mm on average for the height component when additional GLONASS observations can be used for the time series determination. Analyzing satellite orbit overlaps, the rigorous combination of GPS and GLONASS neither improves nor degrades the GPS orbit precision. For GLONASS, however, the quality of the microwave-derived GLONASS orbits improves due to the combination. These findings are confirmed using independent SLR observations for a GNSS orbit validation. In comparison to previous studies, mean SLR biases for satellites GPS-35 and GPS-36 could be reduced in magnitude from \(-35\) and \(-38\)  mm to \(-12\) and \(-13\)  mm, respectively. Our results show that remaining SLR biases depend on the satellite type and the use of coated or uncoated retro-reflectors. For Earth rotation parameters, the increasing number of GLONASS satellites and tracking stations over the past few years leads to differences between GPS-only and GPS+GLONASS combined solutions which are most pronounced in the pole rate estimates with maximum 0.2 mas/day in magnitude. At the same time, the difference between GLONASS-only and combined solutions decreases. Derived GNSS orbits are used to estimate combined GPS+GLONASS satellite clocks, with first results presented in this paper. Phase observation residuals from a precise point positioning are at the level of 2 mm and particularly reveal poorly modeled yaw maneuver periods.  相似文献