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问在某刊中见到:“质量比浓度单位质量溶液中所含溶质的质量百分数,符号为%(m/m)。”这种说法正确吗?答不正确。1)没有“质量比浓度”这一量名称。此量规范名称应是“质量分数”或“质量比”,其符号为“w”。2)定义错误。如指某溶质的质量分数,定义应为“某溶质的质量除以溶液质量”。3)单位符号错误。质量分数的单位为“1”,也可用百分数表示,符号为“%”。在“%”后加“(m/m)”属干修饰单位符号,这是国际单位制不允许的。“质量比浓度”正确吗?@郝欣 相似文献
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在GB 3 10 2 .893中,浓度和物质的量浓度是同一个量名称的2种称谓,使用中可以互换,其法定单位为mol/m3 或mol/L。这就表明,只有物质的量浓度才可以用浓度替换,其他的量名称都不得称为浓度。然而,在科技书刊中,滥用浓度的现象非常普遍。例如:HCl的浓度为0 .5kg/m3 ;Ca的浓度为0 .2 0 ;H2 的浓度为0 .0 5 % ;O2 的浓度为3×10 18L-3 。这里的4个“浓度”都属于滥用,是错误的,应使用各自规范的量名称。它们的正确表述分别为:HCl的质量浓度为0 .5kg/m3 ,或ρ(HCl) =0 .5kg/m3 ;Ca的质量分数为0 .2 0 ,或w (Ca) =2 0 % ;H2 的体积分数为0 … 相似文献
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“说”新闻是新闻类节目的一种创新,但不能一“说”了之,它也有自己的度。“说”与“播”应在各自范畴内发挥最大的作用,包括他们之间所需要的一些自然交叉和渗透。 相似文献
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校对的"察"与"断" 总被引：1，自引：0，他引：1
校对是校对主体对校样差错“察”与“断”的结合。“断”是“察”的结果，“察”是“断”的前提。“察”就是在校对差错时善于察其源，观其形，识其义，辨其音。 相似文献
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笔者在编辑工作中发现不少作者将“阈值”与“阀值”混用。“阈值”和“阀值”究竟是2个不同的词,还是同义词,还是压根儿没有“阀值”这个词,众说纷纭,很有必要予以澄清。《辞海》中关于“阀”和“阈”的词条如下:阀f偄 控制、开关、把持。1)机械名词,指在管道中用来控制液体或气体的部件。意为阀门、开关、把持。如截止阀、减压阀、安全阀。2 )在某一方面有特殊支配地位的人物或集团,如军阀、财阀。3 )阀阅。大门外的左右柱,左为阀,右为阅。亦指功绩和经历。阈y敶 范围,边界,程度。1)门槛、门限,引申为边界、界阈、视阈。2 )阈浓度,用作… 相似文献
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评论员文章从立意的来源来看，可以分为两类，一类可以称之为程序性文章，主要是配合中央和省委的一些重要会议、领导人讲话等刊发的，以宣传和贯彻落实中央与省委的会议精神、学习领会领导人讲话为目的，这类文章内部一般称为“规定动作”。 相似文献
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版面的立体化编排和报道的层次性，对报纸而言，是形式与内容的关系，是“”与“质”的关系。把两巧妙结合起来既是技术和技巧问题，又是思想和修养问题。处理得当，就可以使整个版面“质彬彬”，光彩照人。处理不好，“胜质则野”，徒有花里胡哨的字和图案色块的堆积，没有打动人的理性思辩力量，不能给读以启迪，实为编辑所不取。以下以我从事企业报正刊编辑工作十余年来的一些体会，就教于同行。 相似文献
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如何判别“作贡献”与“做贡献”哪个对? 总被引：1，自引：0，他引：1
问如何判别“作贡献”与“做贡献”哪个对？答在回答这个问题之前,我们先说明一些情况。“作”和“做”都是动词,读音也相同,可是用起来却十分棘手。用它们来组词还比较好办,比如“作法”与“做法”,“作人”与“做人”,“作主”与“做主”,“作为”与“做为”,等等,对不对,哪个对？拿不准时翻翻字典,一般就能够解决;但“作贡献”与“做贡献”, 相似文献
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舆论评判:正义之秤--兼对"媒体审判"、"舆论审判"之说的反思 总被引：2，自引：0，他引：2
关心新闻法制的人都会注意到，“媒体审判”或“舆论审判”已成为近些年来国内研究新闻传播与司法关系的学者经常提及的概念。特别是“张金柱案”、“夹江打假案”。之后，很多这者都对媒体报道影响司法公正的问题，表示忧虑，对“媒体审判”、“舆论审判” 相似文献
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David E. Hubbard Sierra Laddusaw Joel Kitchens Rusty Kimball 《The Journal of Academic Librarianship》2018,44(3):404-411
Academic libraries are increasingly seeking ways to demonstrate their impact on student learning. Acknowledgments - formal statements of indebtedness – in graduate theses and dissertations provide a rather unexplored area for demonstrating impact of the academic library on student learning. This study uses quantitative and qualitative methods to characterize acknowledgments of the Texas A&M University Libraries (TAMU Libraries) in theses and dissertations, both overall and for three disciplines specifically: civil engineering, geography, and history. This study also searched for mentions of the TAMU Libraries throughout the entire body of theses and dissertations. Overall, acknowledgments to the TAMU Libraries in theses and dissertations were less than 1%, though acknowledgments were found in all three disciplines with over a quarter of the history theses and dissertations containing an acknowledgment to libraries. There was no statistically significant difference found between the numbers of acknowledgments in theses versus dissertations. Acknowledgments to the TAMU Libraries were found in the theses and dissertations of 28 different departments. Mentions to the TAMU Libraries – not necessarily a formal acknowledgment – were found throughout the text of theses and dissertations with most concentrated in the acknowledgment, method, and bibliography sections. 相似文献
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Emmanuel E. Baro Vera Z. Godfrey Monica E. Eze 《International Information and Library Review》2013,45(1-2):41-50
The study investigated the extent of adoption of electronic theses and dissertations in university libraries in Nigeria. Data collection for the study was via online questionnaire. The study revealed that digitization of theses and dissertations started between 1980 and 1995. It was found that only a few university libraries have embraced digitization of theses and dissertations in Nigeria. Benefits of electronic theses and dissertations were identified as improving university ranking and visibility, increasing access to the theses and dissertations, saving space in the library, enabling others link to the work with persistent URLs, preserving the work for future generations, and saving costs for students. Challenges such as unstable internet connectivity, lack of funding, irregular power supply, lack of information technology personnel, absence of electronic theses and dissertations submission policy, and copyright issues were identified. It is hoped that the study might provide insights useful for librarians planning to embark on the digitization of theses and dissertations project. 相似文献
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论高校图书馆电子版学位论文的保存与管理工作——以北京大学图书馆为例 总被引：5，自引：0，他引：5
通过对国内外高校图书馆学位论文全文管理现状进行分析,结合当前国内外文档管理技术发展和学位论文系统研发情况,重点介绍北京大学图书馆的学位论文资源建设工作,并就当前国内学位论文工作中普遍存在的全文文件格式、版权等问题提出解决对策。 相似文献
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论题为"素质教育与图书馆"的论文研究综述 总被引：3，自引：0，他引：3
对近几年论题为“素质教育与图书馆”的论文进行了论文统计、论文分类、论点归纳和分析,对这几年的研究现状作出较系统全面的论述,就这一论题的研究指出还存在的问题。 相似文献
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Isaias Arriola‐Quiroz Walter H. Curioso MD MPH Maria Cruz‐Encarnacion Oscar Gayoso MD 《Health information and libraries journal》2010,27(2):148-154
Background: Many medical schools require a student thesis before graduation. Publishing results in a peer‐reviewed journal could be an indicator of scientific value and acceptability by the scientific community. The publication pattern of theses published by medical students in Peru is unknown. The aim of this study was to assess the characteristics and publication pattern of theses in biomedical‐indexed journals conducted by medical students in a university with the highest research output in Peru. Methods: Data from registered theses between 2000 and 2003 were obtained from the university library. Publication of theses in biomedical journals was assessed in 2008 by a search strategy using PubMed, Google Scholar, LILACS, LIPECS and SciELO. Results: Four hundred and eighty‐two medical theses were registered between 2000 and 2003; 85 (17.6%) were published in biomedical‐indexed journals. Of the published theses, 28 (5.8%) were published in MEDLINE‐indexed journals, 55 (11.4%) in SciELO‐indexed journals, 61 (12.6%) in LILACS‐indexed journals and 68 (14.1%) in LIPECS‐indexed journals. Most of the published theses (80%) were in Spanish and published in Peruvian journals; and 17 theses (20%) were published in foreign journals (all of them indexed in MEDLINE). In addition, 37 (43.5%) belong primarily to internal medicine, and 24 (28.2%) belong primarily to infectious diseases. Medical students were first authors in 71 (83.5%) of the articles. Conclusion: In this study, most of the published theses were in Spanish, published in local journals and indexed in LIPECS. The percentage of published theses in biomedical journals at this university is comparable with others coming from developed countries. 相似文献
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1990��1994���ҹ����ײɷ��о����� 总被引：4，自引：0，他引：4
通过对 90年代以来发表在三种图书情报学核心刊物上的有关文献采访论文的统计与分析 ,揭示了当前我国文献采访的研究状况及存在的问题 ,并提出了今后亟待研究的课题 相似文献
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论文运用文献计量学方法,以江苏高职高专图书馆2005-2010年的754篇科研论文为基础,对论文的数量、核心论文量、论文被引情况、论文作者的机构与合作情况及论文主题进行统计分析。结果显示,江苏高职高专图书馆的科研呈发展趋势,发文量逐年递增,但总体论文质量不高,科研地区差异性明显,论文主题较雷同,缺乏创新性和新颖性。 相似文献
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分析博硕士学位论文的上网入库和再发表牵涉到的一系列相关问题。认为:根据《著作权法》对公开发表的界定,博硕士论文答辩后的缴存或者商业性开发是公开发表,但是对博硕士论文的合理使用以及授权并不是出版,其再发表不适用"一次用尽"原则;博硕士研究生应积极配合公益缴存以及合法机构的商业性开发;为充分发挥博硕士学位论文的学术价值,应鼓励其再发表。 相似文献