中国科学院机构知识库网格系统: 检索

New species of fossil Dryopterites from the Lower Cretaceous in the Zhongkouzi Basin, Beishan area, Northwest China, and its geological significance 期刊论文 OAI收割
HISTORICAL BIOLOGY, 2022, 页码: 8
作者: Ren, Wen-Xiu（任文秀）; Wu, Guang-Tao; Han, Lei; Hua, Yi-Fan; Sun, Bai-Nian（孙百年）

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Dryopterites Chijinbao formation Beishan area Early Cretaceous East Asia origin fossil fern foliage

Phylogenetic tree of vascular plants reveals the origins of aquatic angiosperms 期刊论文 OAI收割
JOURNAL OF SYSTEMATICS AND EVOLUTION, 2016, 卷号: 54, 期号: 4, 页码: 342-348
作者: Wang, Qing-Feng; Du, Zhi-Yuan

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收藏 | 浏览/下载：42/0 | 提交时间：2017/04/13

ancestral area aquatic plant early angiosperm fossil age origin

Origin area and migration route: Chloroplast DNA diversity in the arctic-alpine plant Koenigia islandica 期刊论文 OAI收割
SCIENCE CHINA-EARTH SCIENCES, 2014, 卷号: 57, 期号: 8, 页码: 1760-1770
作者: Long Cong; Min YunJiang; Zhao XiuXia; Yany ChunLei; Sun Hang

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origin area refugia migration route phylogeography biogeology Koenigia islandica

Origin area and migration route: Chloroplast DNA diversity in the arctic-alpine plant Koenigia islandica 期刊论文 OAI收割
SCIENCE CHINA-EARTH SCIENCES, 2014, 卷号: 57, 期号: 8, 页码: 1760-1770
作者: Long Cong; Min YunJiang; Zhao XiuXia; Yany ChunLei; Sun Hang

收藏 | 浏览/下载：186/0 | 提交时间：2014/10/11

origin area refugia migration route phylogeography biogeology Koenigia islandica

The Research of real time auto-recognition of the moire fringe (EI CONFERENCE) 会议论文 OAI收割
International Symposium on Photoelectronic Detection and Imaging 2011: Advances in Imaging Detectors and Applications, May 24, 2011 - May 26, 2011, Beijing, China
Wang M.-J.; Wu Z.-G.

收藏 | 浏览/下载：18/0 | 提交时间：2013/03/25

Measuring the movement of raster by the method of moire fringe has the advantage of high sensitivity high resolution and non-contacted measurement. The characteristic of moire fringe is that the image is white alternate with black the angle of the stripes is uniform the width of the stripes is uniform the terminators of the stripes aren't clear. A fast method that can figure out the width and angle of the moire fringe precisely is put forward in this paper. It calculates the angle the stripes firstly. According to the principle of the minimum mean squared error (MMSE) the closer a series of data is the smaller the value of the MMSE will be. The method is described as follows: It takes the image's center as the origin 180 beelines pass through the origin with the same angle interval. it calculates the value of the minimum mean squared error of the 180 beelines and find out the least one among those then the angle of the moire fringe comes out primarily. In order to improving the calculating precision of moire fringe 60 equal angles are divided in the neighborhood of the angle then a precise angle of moire fringe is calculated according to the principle of the MMSE. After getting out the angle of the moire fringe we begin to calculate the width of moire fringe. A line vertical with the moire fringe is drawn and we can get the width of the moire fringe by the vertical line. In order to get over the influence of the noise an effective area with the shape of diamond is selected in the image. The data of area is accumulated and projected according to the direction of moire fringe and a sine curve come out. The width of moire fringe can be obtained by getting the position of the first wave crest the position of the last wave crest and the number of wave crest. Experiments prove that the precision of the method put forward in this paper is enhanced in comparison with the traditional frequency method the precision of width calculation achieves to 99.6% according to the evaluation indicators of width detection error. The computing speed is boosted largely compared with traditional method and it can achieve with 15 ms that satisfying the demand of real time. 2011 SPIE.

A new Triassic marine reptile from southwestern China 期刊论文 OAI收割
J VERTEBR PALEONTOL, 2011, 卷号: 31, 期号: 2, 页码: 303—312
作者:

收藏 | 浏览/下载：21/0 | 提交时间：2013/11/27

GUIZHOU PROVINCE TURTLE ORIGIN ACTINOPTERYGII SAUROPTERYGIA YUNNAN SHELL AREA

An ancestral turtle from the Late Triassic of southwestern China 期刊论文 OAI收割
NATURE, 2008, 卷号: 456, 期号: 7221, 页码: 497-501
作者: Li, Chun; Wu, Xiao-Chun; Rieppel, Olivier; Wang, Li-Ting; Zhao, Li-Jun

收藏 | 浏览/下载：20/0 | 提交时间：2013/11/27

Chelydra-serpentina Reptilia Origin Shell Histology Evolution Guizhou Osteoderms Area

The characteristics of ore-fluid of gold deposits in Jungger-East Tianshan Mountains area, Xingjiang 期刊论文 OAI收割
ACTA PETROLOGICA SINICA, 2008, 卷号: 24, 期号: 4, 页码: 753-761
作者: Wang LiJuan; Wang JingBin; Wang YuWang; Zhu HePing

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收藏 | 浏览/下载：11/0 | 提交时间：2018/09/26

gold deposit fluid inclusion origin of minera metter Junggar-east Tianshan mountains area Xinjiang

The characteristics of ore-fluid of gold deposits in Jungger-East Tianshan Mountains area, Xingjiang 期刊论文 OAI收割
ACTA PETROLOGICA SINICA, 2008, 卷号: 24, 期号: 4, 页码: 753-761
作者: Wang LiJuan; Wang JingBin; Wang YuWang; Zhu HePing

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收藏 | 浏览/下载：16/0 | 提交时间：2018/09/26

gold deposit fluid inclusion origin of minera metter Junggar-east Tianshan mountains area Xinjiang

The geochemistry of rare earth elements (REE) in acid mine drainage from the Sitai coal mine, Shanxi Province, North China 期刊论文 OAI收割
INTERNATIONAL JOURNAL OF COAL GEOLOGY, 2007, 卷号: 70, 期号: 1-3, 页码: 184-192
作者: Cong ZY(丛志远)

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WATERS LAKE GROUNDWATERS ENRICHMENTS ORIGIN RIVERS AREA ZN FE CU