常减压装置减压塔机械抽真空改造设计

介绍了喷射真空泵和液环真空泵的各自特点,结合工程设计实例,探讨了茂名5000kt／a常减压蒸馏装置减压塔机械抽真空改造的工艺方案,工艺管道及自控流程,联锁控制系统等。同时对设备选型和配管方面提出了注意事项,可供类似项目在设计时参考。项目实施后结果表明,采用液环真空泵组代替二级蒸汽喷射器的改造方案是成功的,装置综合能耗降低0．334kgEo／t,改造后操作方案灵活,投资、节能和环保效益明显。     

Breaking the Ivory Tower: Academic Entrepreneurship in the Life Sciences in UK and Germany

We examine engagement in commercial activities (consulting, patenting, and founding) among more than 2200 German and UK life scientists. We test hypotheses that include attributes of individuals, their material and social resources, and perceptions about values and reputation. We find that characteristics reflecting professional security, advantage and productivity are strong predictors for a greater breadth of participation in academic entrepreneurship, but not for all forms of technology transfer that we are able to test. For such academics, science and commerce go hand in hand, as they are best poised to straddle the boundary between industry and academy. We find strong support, however, that scientists perceive the value of patenting differently, and the level of reputational importance placed on scientific compared to commercial achievements matters in shaping commercial involvement.     

基于内容分类的人文社科期刊载体选择与配置策略探究

目前期刊的载体主要有纸质和电子两大类,而人文社科期刊的载体选择往往与其内容分类有着密切关联。图书馆应根据读者不同的需求合理配置两种载体的期刊资源。本文在对人文社科期刊进行内容分类的基础上,深入分析了读者的阅读目的、阅读习惯、阅读体验、利用方式和便捷程度等影响载体选择的因素,进而提出了图书馆在进行期刊配置的过程中,学术和信息类期刊应以电子版为主,适当保留核心期刊的纸质版;新闻和休闲类期刊主要以纸质版为主,不断发展电子版以丰富内容,从而协调配置纸质与电子期刊以适应读者的不同需求。     

利用传真地面图确定航线上的风情

对如何利用传真地面图确定航线上的风情进行了介绍。利用查表的方法确定航线上的风速非常便捷,风向确定也较容易,适合船舶驾驶员在实践中应用。经矢量标绘后,驾驶员可对航线的风情一目了然。     

Evaluating effects of atmospheric CO2 on stability of global climate: a cell-to-cell mapping approach

Atmospheric carbon dioxide concentration [CO2], incoming solar radiation and sea ice coverage are among the most important factors that control the global climate. By applying the simple cell-to-cell mapping technique to a simplified atmosphere-ocean-sea ice feedback climate model, effects of these factors on the stability of the climatic system are studied. The current climatic system is found to be stable but highly nonlinear. The resiliency of stability increases with [CO2] to a summit when [CO2] reaches 290 μL/L which is comparable to the pre-industrial level, suggesting carbon dioxide is essential to the stability of the global climate. With [CO2] rising further, the global climate stability decreases, the mean ocean temperature goes up and the sea ice coverage shrinks in the polar region. When the incoming solar radiation is intensified, the ice coverage gradually diminishes, but the mean ocean temperature remains relatively constant. Overall, our analysis suggests that at the current levels of three external factors the stability of global climate is highly resilient. However, there exists a possibility of extreme states of climate, such as a snow-ball earth and an ice-free earth.     

评“社科期刊编排规范化”

《中国高等学校社会科学学报编排规范》是在《中国学术期刊(光盘版)检索与评价数据规范》基础上制作完成的,带有明显的光盘版特征和痕迹,而后者则是基于电子网络平台的电子版规范,它的作用和功能主要是用于对原创学术论文以及期刊源的检索与评价。《中国高等学校社会科学学报编排规范》不仅存在着"形式主义化"的问题,而且存在大量违背《著作权法》以及国家标准的条款,由于它不适合纸质期刊的编排规律和实际,因而遭到越来越多的批评。"新规范"的思想认识基础,不外乎两条:一是认为随着全球化的到来,"与国际接轨"是必然的,因此,在标准的制定上要国际化,甚至不惜与中国的传统全面"脱轨";二是认为随着信息化、数字化、网络化时代的到来,印刷型期刊"为文献检索与计量评价机构提供服务"是必然的要求。     

浙江省暖冬的特点与汛期降水关系的分析

利用1951年以来的冬季(12月～2月)气温资料，对暖冬年进行划分，发现暖冬年西风带亚洲地区常出现纬向环流，低纬度西太平洋副热带高压偏强，位置偏西，暖冬年份与浙江省进人汛期后的总降水量和台风次数，都有较好关系。     

蒸馏装置常压塔的腐蚀分析

在炼油化工生产过程中,由于介质腐蚀性较强,工作环境较恶劣,蒸馏装置极易发生腐蚀失效,甚至引起装置停工,从而造成重大经济损失。通过总结蒸馏装置常压塔的腐蚀调查情况,分析了该设备发生腐蚀的机理,并提出防腐措施,为装置的正常运行提供保障。     

Learning Instruction: How an Academic Librarian Transitioned to a Health Sciences Environment

This guest column details the experience of an early career academic librarian learning how to instruct and assist students in health sciences programs. It includes information on mentoring, peer coaching, formal and informal trainings, and proficiencies needed for reference and instruction services. The author shares sources of specific knowledge and skills that empowered her to transition to health sciences librarianship.