我的远程太阳观测和拍摄     

loopman 《天文爱好者》2014,(2):72-76

和一些天文摄影爱好者聊天,问到未来天文摄影该何去何从时,很多人都说,或许尝试远程控制是天文摄影的一个选项。这基于以下几点考虑：  相似文献   

2017年《中国学术期刊影响因子年报》发布——《地球学报》复合影响因子2.938     

《地球学报》编辑部 《地球学报》2018,39(1):127-128

  相似文献   

在海南感受酷热与“严寒”     

leithian 《海洋世界》2013,(12):18-19

作为中国最南端的省，海南可以算作中国最温暖的省了。海南岛属热带季风海洋性气候，基本特征为：四季不分明，夏无酷热，冬无严寒。年平均气温在22摄氏度以上。除了夏季稍显炎热，其他季节都是非常舒服的温度，即使是冬季，  相似文献   

济宁—兖州矿区地下水多目标管理模型的研究     

代振学  李竟生 《地球科学与环境学报》1991,(2)

本文试图利用系统工程原理,解决济宁—兖州矿区的供、排水矛盾。在仔细分析矿区水文地质条件的基础上,建立了水文地质概念模型和相应的数学模型,并应用最优化理论识别了模型的水文地质参数;然后,建立了矿区地下水多目标管理模型,其目标函数为:1)使兖西水源地供水量极大化;2)使岱庄、许厂井田排水费用极小化。采用模糊线性规划法求得了管理模型的最优解,最后通过灵敏度分析和流场模拟,证实了最优解的正确性。  相似文献   

紫金山天文台13.7米望远镜水脉泽观测星表     

韩溥  吴月芳 《紫金山天文台台刊》1995,14(3):184-221

本文简要总结了自1990年8月至1994年1日在紫金山天文台13.7米射电望远镜上进行的水脉泽源的观测,观测结果汇集为表1和图1。在所有435个观测对象中共观测到195个水脉泽源,其中108个为新探测到的 本文对观测仪器和数据处理亦作了简要介绍。  相似文献   

两种盐度参数化方案在海冰模式中的应用比较     

WANG Qing-yuan  LI Yan  LI Qing-quan  WANG Lan-ning  MU Lin  YI Xiao-yuan 《海洋通报(英文版)》2013,(2):3-14

本文详细介绍了SIS海冰模式中引进两种盐度参数化方案即等盐度方案和盐度廓线方案对海冰模拟所存在的差异。利用盐度廓线方案导出的表征盐度与海冰温度间关系的方程比等盐度方案多出一项,将定义为盐度差异项。盐度差异项对海冰厚度的热力作用表现为：在海冰厚度增长季节（11月到次年5月）,盐度差异项通过升高海冰内部温度,抑制海冰增长;在消融的第一阶段（6．8月）,盐度差异项通过升高海冰内部温度加快海冰消融;在消融的第二阶段（9．10月）,盐度差异项通过降低海冰内部的温度抑制海冰消融。但尺度分析表明,盐度差异项要比方程中队海冰温度作用最大项小1．2个量级,如果采用一级近似,可以略去盐度差异项,因此盐度差异项对海冰增长和消融影响很小。同时利用冰洋耦合模式（ModularOceanModel,MOM4）,分别采用两种盐度参数化方案模拟北极海冰厚度和海冰密集度的季节性变化,模拟结果也表明两种方案模拟得到的海冰厚度和海冰密集度的季节性变化相差甚小。  相似文献   

风对中国东部海域海平面季节变化的影响     

MU Lin  CHI Yong-xiang  LIU Shou-hua  SONG Jun  LIN Xiao-pei  LI Yan  ZHANG Jian-li 《海洋通报(英文版)》2013,(2):26-36

应用ROMS数值模式配置基本实验模拟了2004年到2006年中国东部海域海平面的季节变化。模拟结果与TOPEX／Poseidon（T／P）卫星高度计观测结果基本一致,海平面年较差从中国沿岸到黑潮路径逐渐变小。将数值模式的风应力项去掉,配置对比实验。与基本实验结果对比发现,对比实验海平面仍然具有季节变化,但是闽浙沿岸和苏北沿岸海平面春夏季异常偏低、秋冬季异常偏高现象消失,中国沿岸向太平洋的海平面变化减弱。春季和秋季,渤、黄海和黑潮附近海平面异于东海的现象减弱。对比实验海平面的年较差的数值明显减小,从近岸向黑潮海平面年较差渐变的过程消失。整个渤黄海的海平面年较差近似。对比实验海平面年较差占基本实验海平面年较差比率从近岸向黑潮路径逐渐增大。  相似文献   

Petrology and phase equilibrium modeling of sapphirine ＋ quartz assemblage from the Napier Complex,East Antarctica： Diagnostic evidence for Neoarchean ultrahigh-temperature metamorphism     

Hisako Shimizu  Toshiaki Tsunogae  M. Santosh 《地学前缘(英文版)》2013,4(6):655-666

A synthesis of the petrological characters of granulite facies rocks that contain equilibrium sapphirine ＋ quartz assemblage from two localities （Tonagh Island （TI） and Priestley Peak （PP）） in the Napier Complex,East Antarctica,provides unequivocal evidence for extreme crustal metamorphism possibly associated with the collisional orogeny during Neoarchean.The reaction microstructures associated with sapphirine ＋ quartz vary among the samples,probably suggesting different tectonic conditions during the metamorphic evolution.Sapphirine and quartz in TI sample were probably in equilibrium at the peak stage,but now separated by corona of Grt ＋ Sil ＋ Opx suggesting near isobaric cooling after the peak metamorphism,whereas the Spr ＋ Qtz ＋ Sil ＋ Crd ＋ Spl assemblage replaces garnet in PP sample suggesting post-peak decompression.The application of mineral equilibrium modeling in NCKFMASHTO system demonstrated that Spr ＋ Qtz stability is lowered down to 930 ℃ due to small Fe3＋ contents in the rocks （mole Fe2O3/（FeO ＋ Fe2O3） =0.02）.The TI sample yields a peak p-T range of 950-1100 ℃ and 7.5-11 kbar,followed by cooling toward a retrograde stage of 800-950 ℃ and 8-10 kbar,possibly along a counterclockwise p-T path.In contrast,the peak condition of the PP sample shows 1000-1050 ℃ and ＞12 kbar,which was followed by the formation ofSpr ＋ Qtz corona around garnet at 930-970 ℃ and 6.7-7.7 kbar,suggesting decompression possibly along a clockwise p-T trajectory.Such contrasting p-T paths are consistent with a recent model on the structural framework of the Napier Complex that correlates the two areas to different crustal blocks.The different p-T paths obtained from the two localities might reflect the difference in the tectonic framework of these rocks within a complex Neoarchean subduction/collision belt.  相似文献   

Two New Wasps (Hymenoptera: Stephanoidea: Ephialtitidae) from the Middle Jurassic of China     

LI Longfeng  SHIH Chungkun  REN Dong 《《地质学报》英文版》2013,87(6):1486-1494

Two new species of wasps belonging to the family Ephialtitidae,Praeproapocritusflexus sp.nov.and Proapocritus parallelus sp.nov.,from the Middle Jurassic Jiulongshan Formation of southeastern Inner Mongolia,China,are described and illustrated.Praeproapocritus vulgates Rasnitsyn ＆ Zhang,2010 and six species of Proapocritus,P.densipediculus,P.sculptus,P.longantennatus,P.formosus,P.atropus,and P.elegans,all described by Rasnitsyn and Zhang in 2010,are first record from the Middle Jurassic of China.These two new findings supplement the morphological understanding of ephialtitids in the Middle Jurassic of China and broaden the diversity of ephialtitids in their by-gone ecosystems.  相似文献   

New Genus and Species of Rhyacophilidae (Insecta: Trichoptera) from the Middle Jurassic of China     

GAO Yan  YAO Yunzhi  and REN Dong 《《地质学报》英文版》2013,87(6):1495-1500

One new genus with a new fossil species,Declinimodus setulosus gen.et sp.nov.which was found in the Middle Jurassic Jiulongshan Formation of Daohugou,Inner Mongolia,China,are described and illustrated.The new species is assigned to the Rhyacophilidae according to buttonshaped of the 2nd segment of maxillary palp,and the forked R1 （in the forewing,located near apex）.These new discovery are the earliest fossil records of Rhyacophilidae,which providing important evident for the study of the origin and early evolution of Trichoptera.  相似文献