共查询到20条相似文献，搜索用时 609 毫秒
1.
《中国科学院院刊(英文版)》2009,23(1):20-20
Studies by astronomers from the CAS Purple Mountain Observatory （PMO） haveoffered solid evidence that Sayh al Uhaymir 300 （SaU 300）, a lunar meteorite discovered in 2004 from the Oman desert, was originated from the far side of the Moon, the lunar hemisphere that is permanently turned away from the Earth. 相似文献
2.
《中国科学院院刊(英文版)》2011,25(3):239-240
The Near Earth Object Survey Telescope(NEOST), located at the Xuyi station of the Purple Mountain Observatory,is a telescope with the most powerful detection capacity,the highest efficiency and the best performance in the fields of near Earth object survey and optical imaging in China.NEOST is an f/1.8 Schmidt type telescope with a 1.20 相似文献
3.
在过去的几十年间,天文科学数据量已经从GB量级进入到了TB量级。如今,正在从TB量级向PB量级迈进。天文学研究已经进入到了数据密集型时代。面对海量天文数据对存储、计算、带宽、软件甚至工作模式等方面的需求,天文学家连同信息技术领域、计算机科学领域的专家正努力使基于天文数据的知识发现过程变得更加容易。旨在实现科学数据互操作的虚拟天文台就是这方面的积极尝试,它将为数据密集型时代的天文学研究和教育科普提供一个信息化环境。天文信息学则从天文学一个分支学科的高度去考虑天文学的长远发展。文章论述了天文学研究在数据密集型时代所面临的需求,介绍了天文学家为应对数据密集型挑战正在研究开发的虚拟天文台技术,探讨天文信息学所包含的内容和发展天文信息学的必要性,展望了中科院统筹规划天文领域科研信息化工作,建设中国虚拟天文台的前景。 相似文献
4.
《中国科学院院刊(英文版)》2011,25(3):223-225,227
The National Astronomical Observatories(NAOC) was officially founded in 2001 through the merger of five astronomy-oriented organizations of the Chinese Academy of Sciences(CAS).Headquartered in Beijing,NAOC has four subordinate units across the country:Yunnan Astronomical Observatory(YNAO),Nanjing Institute of Astronomical Optics and Technology(NIAOT),Xinjiang Astronomical 相似文献
5.
Portolano M 《Isis; an international review devoted to the history of science and its cultural influences》2000,91(3):480-503
Astronomy thrived in Europe during the early nineteenth century, but in the United States a utilitarian mind-set opposed it. John Quincy Adams's oratory in support of American astronomical discovery reached its peak during congressional debate over the Smithsonian Institution (1838-1846). During this debate Adams countered proposals to found a university with plans for an observatory. His addresses to congressional and public audiences about observatories and astronomy were intended to foster interest in the science and encourage the growing astronomical community in America. Although the U.S. Naval Observatory in Washington, D.C., was established before the Smithsonian debate ended, many considered Adams its political father. Adams composed his speeches on astronomy in a systematic manner, following neoclassical principles of rhetoric that he had taught at Harvard University. His speeches both in and outside of Congress show evidence of the rhetorical principles he conscientiously used in the service of astronomy. 相似文献
6.
《中国科学院院刊(英文版)》2005,19(2):80-80
Scientists from the Chengdubased CAS Institute of Mountain Hazards and Environment (IMHE) recently worked out a decision-making support system for disaster mitigation on debris fans in mountainous regions.As a domestic vanguard, the system plays a key role in the fight against debris flow and helping to reduce casualties. 相似文献
7.
《中国科学院院刊(英文版)》2004,18(4):198-198
With support from the National Natural Science Foundation of China and U.S. National Science Foundation, a Sino-US research team headed by Prof. Sun Hang from the CAS Kunming Institute of Botany (KIB)and Dr. David E. Boufford from Harvard University has recently completed a two-month botanical field trip to the Hengduan Mountain Range in south China. 相似文献
8.
《中国科学院院刊(英文版)》2008,22(3):149-150
The Sichuan earthquake on 12 May was the most devastating one to hit China over the past 60 years or so. As the affected were mostly mountainous areas, serious damages were caused by various secondary disasters ranging from mountain collapse to the formation of quake lakes. This leaves Prof. DENG Wei, director-general of the Institute of Mountain Hazards and Environment, CAS, much to think about, and he is calling for strengthening studies on mountain science. 相似文献
9.
Osteoporosis becomes a serious health threat for older postmenopausal women by predisposing them to an increased risk of fracture.
Osteoporosis and associated fractures are an important cause of morbidity and mortality. Special attention is being paid to
early detection, management, and treatment of postmenopausal osteoporosis in women. Biochemical markers can enable dynamic
and rapid measurement of total body skeletal metabolism and will be clinically useful in the management of postmenopausal
osteoporosis women (PMO) and also for assessing the effects of antiresorptive therapy. With this view, we planned to assess
osteoclastic activity by determining urinary hydroxyproline in osteoporotic women. The aim of this study is to measure urinary
hydroxyproline (expressed as mg of hydroxyproline/g of creatinine) and serum ascorbic acid in postmenopausal women with osteoporosis
and without osteoporosis. These biochemical parameters were determined 3 months post antiresorptive therapy (alendronate + calcium + vitamin
D) in postmenopausal osteoporosis patients. 60 postmenopausal women with osteoporosis in the age group 45–60 years and 60
healthy postmenopausal women (normal bone mineral density) in the same age group were included in the study. Urinary hydroxyproline
levels were significantly increased (P < 0.001) in PMO at baseline level as compared to control group. These levels were decreased significantly (P < 0.001) post therapy in PMO patients. Serum vitamin C levels were significantly decreased (P < 0.001) in PMO patients at baseline level as compared to controls. No significant change occurred of serum vitamin C level
post therapy. Raised excretion of hydroxyproline at the baseline level might be due to increased degradation of collagen type
I from the bone matrix in osteoporosis. Breakdown of collagen seems to be lowered as reflected by lowering of hydroxyproline
excretion post antiresorptive therapy. Alteration in the concentration of this marker can be very well utilized to monitor
the effectiveness of therapy. Thus simple, direct urinary assay to measure bone resorption is very useful in monitoring the
therapy in PMO and may become an integral part of the management of osteoporosis. 相似文献
10.
《中国科学院院刊(英文版)》2011,25(3):238-238
The 2.4m optical telescope of Yunnan Observatory was installed at Lijiang Observatory in the northwest of the Yunnan Province in 2007,which became operational since May 2008.At present,it is the largest general-use optical telescope in East Asia. The telescope,which was made by the TTL Company, 相似文献
11.
湖南衡山山歌历史悠久,是衡山音乐文化的重要组成部分,也是湘中南一带最具代表性的民间歌曲形式.衡山山歌曲调高亢悠扬,旋律自由流畅,歌曲内容丰富,展现了衡山人生产生活的各个方面,是衡山人往昔生活的活化石.本文对衡山山歌的背景、审美特征、演唱等方面进行了分析和论述. 相似文献
12.
书信体叙事策略是《紫色》里最重要的叙事技巧。本文将从两个方面对其进行研究。一方面,沃克对书信体叙事策略的运用本身具有鲜明的特征;另一方面,通过书信体叙述策略赋予女性声音、传达女性自我意识觉醒的主题,沃克在《紫色》里实现了形式与内容的统一。 相似文献
13.
14.
Leslie B Hunt 《Endeavour》1981,5(2):61-67
The most effective means of producing the highest quality enamel colours from pink to maroon for glass and ceramics is still based upon the preparation of colloidal gold and stannous hydroxide known as Purple of Cassius. This was, however, known for more than twenty-five years before an account of it was published by Cassius in 1685. Its constitution remained a lively source of argument by chemists until finally clarified by Richard Zsigmondy early in this century. 相似文献
15.
天文学是一门古老而又年轻的科学,它不断地吸引着人们去探索,同时,能不断地开拓着人们的视野。开展青少年天文科普活动具有重大的现实意义;针对我国开展青少年天文科普活动之现状和问题,提出在天文科普教育活动中,突出把握好"五性",并以天文观测为核心,开展天文科普教育活动等对策,以实现我国天文科普教育工作的新局面。 相似文献
16.
北雁荡山建为避暑兼避寒胜地的探讨 总被引：5，自引：0，他引：5
在全面研究浙江北雁荡山的地理环境之后指出 :1.“北雁”属亚热带季风气候 ,同时受海洋气候和山地气候双重影响 ,冬暖夏凉的气候特征十分明显 ;2 .“北雁”奇峰雄嶂满目皆是 ,摩崖石刻、古寺古塔随处可见 ,它包含了作为名山的全部内容 ;3.楠溪江和温州城离“北雁”不远 ,各自河川秀丽 ,民风淳朴 ,并与“北雁”形成旅游资源优势互补 .“北雁”能建为理想的避暑兼避寒胜地 相似文献
17.
18.
云南横断山区的民族文化多样性研究 总被引：2，自引：1，他引：1
横断山区是我国乃至世界多样性最为复杂的区域,它具有生物多样性和民族文化多样性的双重特征,并面临生物和民族文化多样性保护的艰巨任务。在民族地区要开发民族文化力,建立既能固守民族传统文化,又能适宜现代化的民族发展模式。横断山区的多样性要采取保护性的开发和开性的保护,建立自然和民族文化保护区,保证横断山区多样性永存和社会经济的持续发展。 相似文献
19.
自动站月报审核中常见问题分析及对策思考 总被引：1，自引：0，他引：1
文章对自动气象站地面月报表数据文件在审核中经常遇到的问题进行了分析总结,针对这些问题提出了相应的解决对策,希望在地面数据质量控制工作中,对避免错情的发生、保证地面月数据文件的质量具有一定的参考。 相似文献
20.
高海拔宇宙线观测站(Large High Altitude Air Shower Observatory,LHAASO)项目是中国科学家在国际宇宙线研究领域提出的重大前沿项目,也是中国在西南地区布局的又一重大科技基础设施。LHAASO项目的实施将最终建成具有国际先进水平的宇宙线研究中心,与世界其他3个宇宙线观测站(位于阿根廷的极高能宇宙线观测站、位于南极的中微子天文观测站、待建的甚高能伽玛天文观测站)形成优势互补,对宇宙线起源这一世纪之谜发起冲击,并推动粒子物理学、天文学、宇宙学领域的相关科学研究产生突破性进展。同时,项目的建设运行也将对设施所在地的科学研究、学科发展、人才培养有重要影响,提高地区科学普及水平,并带动相关经济文化发展。文章将针对重大科技基础设施对地方的科技教育及经济社会影响进行初步分析。 相似文献