可与国际单位制单位并用的其他单位 Other Units outside the SI Accepted for Use with the SI 量的名称(Quantity) 单位名称 (Name) 符号 (Symbol) 与SI关系 (Value in SI units) 时间(time) 分(minute) 小时(hour) 日(day) min h d 1min = 60s 1h = 60min = 3600s 1d = 24h = 86 400s 角(angle) 度(degree) 分(minute) 秒(second) 。 1 。 =(/180) rad 1 = (1/60) = (/10 800) rad 1 = (1/60) = (/648 000) rad 体积(volume) 升(liter) L 1 L = 1 dm 3 = 10 -3 m 3 质量(mass) 吨(metric ton) 原子质量单位 (unified atomic mass unit) t u 1 t = 10 3 kg 1 u 1.660 54 x 10 -27 kg 衰耗(attenuation) 奈培(neper) Np 1 Np = 8.686 dB 电平(level) 贝尔(bel) B 1 B = (1/2) ln 10 Np 能(energy) 电子伏特 (electron-volt) eV 1 eV 1.602 18 x 10 -19 J 天文学单位(astronomical unit) 天文学单位(astronomical unit) ua 1 ua 1.495 98 x 10 11 m
单点课程之数字 1 数字可以在文章中起到多种作用。 出现在句首的数字应该完整拼写。 16 species of whale have been added to the list of the world`s endangered animals. 【 错误 】 Sixteen species of whale have been added to the list of the world`s endangered animals. 【 正确 】 如果数字以及度量衡或时间单位出现在句首,数字和单位均应完整拼写。 15 mL of buffer was added to the solution. 【 错误 】 Fifteen milliliters of buffer was added to the solution. 【 正确 】 如果句首的数字超过100,为了表达清晰,最好改写这句话。 Three hundred and sixty-seven participants took part in the study. 【 错误 】 A total of 367 participants took part in the study. 【 正确 】 练习 您可以根据以上的总结尝试改写下面几句话,答案将在本周五公布在本帖内。 Three hundred people took part in the trial, of which only 30% completed it. 17 of the thirty parrots captured in the forest during the defined time period were found to have the infection. 15 cm thick cable was laid for five hundred meters. 20 sensors were placed at 25 meters intervals.
还没有来得及仔细研究,觉得有些用处,与大家共享。 http://www.authormapper.com AuthorMapper searches journal articles and plots the location of the authors on a map. 以下内容来源于图书馆介绍: Springer近期推出了AuthorMapper服务AuthorMapper网站提供浏览模式的搜寻,亦可以用关键词来搜寻,还可以取得各种相关的统计资料利用Google Map来呈现,该数据库目前已经有三百万篇期刊学术论文,透过这个服务使用者可以很方便了解一个学术领域或议题,在各国/各研究机构之间的论文发表数量的比较。