共查询到20条相似文献，搜索用时 250 毫秒
1.
吸光度(光密度)量符号的正确表示方法 总被引：1，自引：0，他引：1
针对目前各科技期刊对吸光度（光密度）的量符号的不同认识和不恰当表示方法,分析了吸光度（光密度）的含义,根据《量和单位》国家标准的规定,提出了吸光度（光密度）量符号的正确表示方法,以期为广大同仁提供参考,为正确执行《量和单位》国家标准提供依据. 相似文献
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本文对农业科技期刊中几种常见酶的酶活性单位的使用现状进行分析,发现该类酶酶活性单位应用较为混乱,甚至出现使用错误。科技期刊编辑在编校过程中应溯本追源,保证所用单位的自明性、客观性和准确性;同时探讨了自定义酶活性单位的规范化使用途径。 相似文献
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论科技期刊“等级”与其所载论文质量的关系 总被引：1，自引：1，他引：1
针对我国科研院所和大专院校近年来普遍通过给科技期刊"定级"等方法来评估科技论文质量的现象,指出了这种过度简单化的处理方式对期刊发展及科学研究的不良影响,从概率论角度分析了不同质量标准科技期刊与其所载科技论文之间的质量关系.论证了我国学术研究领域目前所流行的几种划分期刊等级的典型"标准'之不合理性. 相似文献
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邓建元 《中国科技期刊研究》2001,12(4):309-311
对科技期刊经常出现用英制单位“目”来表示原料粒度规格的情况，阐明了应该采用国际单位制取代、但又不能简单取代的理由。文中分析了“目”的取代特点，提出了几适用于不同情况下的取代方法及其表述方式，以供同行参考。对特定条件下仍然出现“目”的现象提出了一点个人看法。 相似文献
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分别介绍了几种常用的知识表示方法,在讨论了知识表示方法选择所应考虑的因素后,对这些方法进行了综合比较,分别指出了其优缺点。进而提出了利用本体来表示新产品开发领域的知识以解决其知识共享和知识重用的问题,并对其优势进行了分析。 相似文献
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梁秋野 《中国科技期刊研究》2000,11(2):121-122
针对目前科技期刊中数学逻辑运算符号的不正确使用倾向,在给出其正确使用方法的同时,剖析了几种常见的错误,并对科技期刊同仁提出了要重视来稿中数学逻辑运算符号的编辑加工问题的倡议。 相似文献
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梁秋野 《中国科技期刊研究》2000,11(1):121-60
针对目前科技期刊中数学逻辑运算符号的不正确使用倾向,在给出其正确使用方法的同时,剖析了几种常见的错误,并对科技期刊编辑同仁提出了要重视来稿中数学逻辑运算符号的编辑加工问题的倡议。 相似文献
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赵业玲 《中国科技期刊研究》2009,20(3):556-557
介绍化学稿件中几种常用到的溶液浓度表示方法,通过简单的换算,辨析与溶液浓度相关的量和单位的含义,并根据国家标准以规范形式表达。 相似文献
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《中国科学院院刊(英文版)》2008,22(1):2-3
CAS should stick to the principle of rendering service to, and giving impetus for, the development of China＇s science enterprise by making S＆T innovations, said CAS President LU Yongxiang. The CAS president made the remarks in a recent talk to communicate the gist of the winter session of the Party＇s Leading-member Group at CAS, which was held from 7 to 11 January in Beijing. 相似文献
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《中国科学院院刊(英文版)》2008,22(1)
With great care, Dr. ZHOU Zhonghe takes out a package wrapped by cotton tissue from a drawer and says: "This is the gem of our collections: the fossil of a bird that lived 125 million years ago!" Then, pointing at a tiny mound, he explains: "Look, this is the claw and that is the head. It was in the egg shell and ready to hatch ... The species fell into a family of waterside inhabitants." 相似文献
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Prof. SUN Changpu from the CAS Institute of Theoretical Physics coworkers from University of Basel in Switzerland have worked out a way - at least in theory - to split a beam of molecules according to their chirality. The technique involves passing the molecules through three different laser beams is similar to the famous Stern-Gerlach effect whereby a beam of atoms passing through a magnetic field is split in two according to the atoms' spin states 《中国科学院院刊(英文版)》2008,22(1):23-23
Prof. SUN Changpu from the CAS Institute of Theoretical Physics and coworkers from University of Basel in Switzerland have worked out a way --at least in theory --to split a beam of molecules according to their chirality. The technique involves passing the molecules through three different laser beams and is similar to the famous Stern-Gerlach effect, whereby a beam of atoms passing through a magnetic field is split in two according to the atoms＇ spin states （Phys. Rev. Lett. 99 130403）. 相似文献
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《中国科学院院刊(英文版)》2014,(3):212-213
<正>In February 2014,the 30th Chinese Antarctic inland expedition team reported that they have successfully conducted the seeing measurement at the Antarctic Taishan Station using a Differential Image Motion Monitor(DIMM)developed by the Nanjing Institute of Astronomical Optic and Technology(NIAOT),Chinese Academy of Sciences.In astronomy,seeing is a physical parameter that describes the irregular movement and blur of the star 相似文献
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XIN Ling 《中国科学院院刊(英文版)》2014,(4):270-271
Amassive overhaul is coming to the Chinese Academy of Sciences （CAS）. To straighten its ＂fragmented, inefficient research＂, the academy has decided to restructure its 104 institutes for better teamwork. 相似文献
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SONG Jianlan 《中国科学院院刊(英文版)》2014,(4)
<正>DNA demethylation in mammalian zygotes,a biochemical process through which the parental genomes let go the epigenetic marks from their"past lives"to obtain totipotency,has long fascinated biologists:how does it happen?A joint team at the CAS Shanghai Institutes for Biological Sciences tells a surprising story. 相似文献
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China is one of the fastest growing economies worldwide. Are science and research also in the fast lane? We talked with LUO Yuan, scientist at the Institute of Coal Chemistry in Shanxi, and Axel Mosig, Professor at Ruhr University in Bochum, who has first-hand experience working and living in China. 相似文献
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Joachim Trümper 《中国科学院院刊(英文版)》2014,(2):201-201
<正>"In 1979 two Chinese scientists joined our institute in the framework of the historical CAS-MPG agreement.This marked the beginning of a longstanding fruitful collaboration.Many visitors followed and contributed to our scientific programs.–My first visit to China took place in 1981–with stays at CAS institutes in Bejing,Nanjing,Shanghai and Kunming,where I received unforgettable impressions of 相似文献
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《中国科学院院刊(英文版)》2014,(3)
<正>May 15,2014Publicly funded scientific research is an important means for the society to create knowledge,support innovation,and promote growth.Research articles from such research are knowledge resources to be shared by all.Their open access will facilitate the dissemination and utilization of knowledge,turn the knowledge produced by public investment effectively into innovation and development capabilities of the society,ensure that public knowledge benefi ts all,and strengthen the innovation driven development strategy.Therefore,Chinese Academy of Sciences(CAS)issues at the present stage the following open access policy for articles from publicly funded scientifi c research projects:CAS requires its researchers and graduate students to 相似文献
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《中国科学院院刊(英文版)》2014,(3)
<正>Between February and March of 2013,the source of avian-origin H7N9 human infection was discovered in Shanghai and Anhui,China.Prior to this,H7N9 has only exhibited characteristics of a low pathogenic avian infl uenza virus,carried by chickens with no known cross-species transmission.By the end of August 2013,Chinese mainland reported a total of 134 confi rmed cases of H7N9 human infections across12 provinces and 42 cities,resulting in 45 deaths.In October and November,Zhejiang Province found three new cases and Guangdong found one case of human infection,suggesting the possibility of a comeback in the fall and winter seasons.Researchers led by Prof.GAO Fu(George Fu Gao)at the Institute of Microbiology,CAS and Beijing Institutes of Life Science,have made progress on understanding 相似文献