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Sedimentological studies of aeolian sands in chinese deserts

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Sedimentological studies of aeolian sands in Chinese deserts

中国科学院地质与地球物理研究所2.02.术年会

作者： YANG Xiaoping institute of Geology and Geophysics,{2. academy of Sciences,10002. beijing,china

The objective of this study has,been to analyse the sedimentological properties of the dune sand in chinese *** were from the Taklamakan Desert in southern Xinjiang and from the Badain Jaran Desert in western Inner *** examination included particle size,heavy minerals and micro-textures on the quartz *** is fount out that the sand in the Taklamakan is finer than in the Badain *** weathering during the glaciations was thought to be responsible for small grain *** content of heavy minerals in the Taklamakan is higher than in the Badain *** addition,the percentage of unstable,moderately stable minerals in the Taklamakan is higher than in the Badain *** is concluded that the percentage of stable and very stable minerals increases from west to east in the deserts of northern china,reflecting the regional changes of the intensity of chemical *** with warm deserts in Africa,the sand of chinese deserts is characterized by small grain size and by high percentage of unstable and moderately heavy *** differences were presumably caused by the temperature difference and palaeoenvironmental histories.

关键词： geomorphology sedimentology desert aeolian sand china

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基于灰关联度评价的投资决策模型及应用

系统工程理论与实践 2002年第9期22卷 132-136页

作者：罗本成原魁眭凌马小军中国科学院自动化研究所北京100080 武汉大学水利水电学院湖北武汉430072

介绍灰关联度的有关理论 ,并尝试性地将之应用到投资决策中 .又进一步结合模糊理论 ,建立新的决策模型 .通过对比研究。

关键词：灰关联度评价投资决策模型模糊灰关联度灰色系统理论

The molecular design of rice quality

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The molecular design of rice quality

A New Formal Test Suite Specification Language For IPv6 Conformance Testing

从植物科学到农业发展——2.12.国植物生物学大会

作者： Dali Zeng~(1,2.,Jiayang Li~(2.),Qian Qian~(1*) 1 State Key Laboratory of Rice Biology,china National Rice Research institute,Hangzhou 310006 2.institute of Genetics and Developmental Biology,chinese academy of Sciences,beijing 100081.

With the development of molecular biology,the cloning and characterization of important agronomic gene,the genomics research,the bioinformatics databases and software tools ect, increased *** achievements provide exciting opportunities for rice molecular *** this study,we integrated bioinformatics analysis,development of gene label, high-throughout screening methodology in rice *** trait about rice quality,grain yield and plant type were pyramided to typical indica based on successive backcrossing and multi *** new rice strains are undergoing in Zhejiang Province and National Regional Trails.

关键词： rice quality molecular breeding

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A New Formal Test Suite Specification Language For IPv6 Conf...

THE PROGRESS IN THE RESEARCH ON RADIO RAPID FLUCTUATION IN SOLAR FLARES FOR THE LAST YEAR

2.03 International Conference on Communication Technology

作者： ZhangYujun LiZhongcheng institute of Computing Technology,chinese {2. of Sciences,beijing, china 100080

IPv6 is the next generation Internet protocol. More and more productions supporting IPv6 have been developed, which makes IPv6 conformance testing necessary. The test suite specification language is v

关键词： -IPv6 conformance testing test suite specification language TSSL

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天文研究与技术 1990年第4期 234-240页

作者： Fu Qijunbeijing Astronomical Observatory, chinese {2. of Sciences, beijing 100080, china

The research on‘Rapid Fluctuation in Solar Flares’is paid great attention becauseof its important position in the solar flare physics,and it is also one of the importantparts in the project“2. MAX GLOBAL CHARACTER ... 详细信息

关键词： Solar PROGRESS SOLAR RADIO RAPID burst Figure observational arrows grant

太阳中微子及超新星中微子探测——2.02.诺贝尔物理学奖成果评述

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物理 2003年第2期32卷 80-86页

作者：顾以藩中国科学院高能物理研究所北京大学物理学院北京 100871

文章回顾了中微子天文学的诞生过程，着重介绍了2.02.诺贝尔物理学奖获得者雷蒙特·戴维斯和小柴昌俊在观测太阳及超新星中微子方面的开创性贡献，扼要描述了这个领域的发展现状及前景，并简单探讨了历史给予人们的几点启发.

关键词：探测 2.02.诺贝尔物理学奖中微子天文学放射化学实验水切连科夫技术太阳中微子问题 SN1987A超新星

Design,construction and mechanical behavior of relics of complete large Longyou rock caverns carved in argillaceous siltstone ground

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Journal of Rock Mechanics and Geotechnical Engineering 2011年第2期3卷 131-152页

作者： Zhifa Yang1, Zhongqi Yue2. Lihui Li1 1 Key Laboratory of Engineering Geomechanics, institute of Geology and Geophysics, {2. academy of Sciences, beijing, 10002., china 2.Department of Civil Engineering, the University of Hong Kong, Hong Kong, china Key Laboratory of Engineering Geomechanics Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China Department of Civil Engineering the University of Hong Kong Hong Kong China

This paper presents a comprehensive summary of data, analyses and findings from the investigations over the past twelve years about the relics of large Longyou rock caverns carved about 2.000 years ago at shallow depths in argillaceous siltstone. The paper presents the typical features associated with the rock caverns. They include structures, large spans, portals, extreme shallow-buried depths, imprints, drainages, inclined ceiling, inclined sidewalls, slender rock pillars, rock staircases, site and strata selections, caving lighting, carving method, and underground construction surveying. They are used to reconstruct and highlight the design and construction methods adopted by the ancients. The paper further demonstrates that the relics of the complete large rock caverns are a consequence of coincidental combinations of ancient human effort and natural factors. The full occupation of water with weak acidity in the large rock caverns with the soft surrounding rocks of weak alkalinity is found to be the main factor ensuring and preserving the caverns to have been stable and integral over 2.000 years. However, the five unwatered complete rock cavern relics have been experiencing various deteriorations and small failures including cracks, seepage, small rock falls and delaminating ceiling rocks. Although these deteriorations have been repaired and stabilized effectively, the paper demonstrates that an entire roof collapse failure is highly possible in the near future to each of the five unwatered rock cavern relics. The findings presented in this paper are also invaluable both to the long-term protection and preservation of the large rock cavern relics of national and international interests and importance, and to extend and enrich our experience and knowledge on the long-term stability and integrity of man-made underground rock cavern engineering projects.

关键词： rock cavern rock mechanics rock engineering long-term stability and integrity argillaceous siltstone environment

Correlations Between the Conditional Moments in ^(16)O and ^(32.S Fragmentation at High Energy

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chinese journal of nuclear physics 1995年第1期17卷 13-16页

作者： Liu Fu-hu (institute of High Energy physics,{2. academy of Sciences,beijing 100039)Sun Han-cheng (china institute of Atomic Energy,B.O.Box 2.5(94),beijing 102.13) 中科院高能物理所北京中国原子能科学院北京

The conditional moments of the charge distributions of the projectile frag-ments in 16O and 32. fragmentation behaviour are obtained by using a partition *** logarithmic correlations between the conditional moments ar... 详细信息

The conditional moments of the charge distributions of the projectile frag-ments in 16O and 32./sup>S fragmentation behaviour are obtained by using a partition *** logarithmic correlations between the conditional moments are observed,Thecalculated results are in agreement with the experimental data of 3.7 and 2.0GeV N 16O-emulsion and 2.0 GeV/N 32./sup>S-emulsion interactions.

关键词： Projectile fragment Charge distribution Conditional moment Logarithmic correlation

石油焦水蒸气气化过程孔隙结构和气化速率的变化

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燃料化学学报 2004年第4期32卷 435-439页

作者：李庆峰房倚天张建民王洋时铭显孙国纲中国科学院山西煤炭化学研究所山西太原030001 上海理工大学上海200093 石油大学(北京) 北京100083

以氮气为吸附质,测定了部分气化石油焦的比表面积、孔容及其随孔径的分布,研究了石油焦的孔隙结构在气化过程中的变化及其对气化反应的影响。结果表明,石油焦的孔主要由微孔组成;水蒸气条件下气化时石油焦的比表面积、孔容随碳转化率增... 详细信息

以氮气为吸附质,测定了部分气化石油焦的比表面积、孔容及其随孔径的分布,研究了石油焦的孔隙结构在气化过程中的变化及其对气化反应的影响。结果表明,石油焦的孔主要由微孔组成;水蒸气条件下气化时石油焦的比表面积、孔容随碳转化率增加而不断增大;不同孔隙率和比表面积的石油焦,其气化反应速率曲线变化趋势不同;石油焦的比气化反应速率与孔隙结构有着紧密的关系,比气化反应速率和有效比表面积之间有着较好的线性关系。

关键词：石油焦气化孔隙结构