文献计量视角下半导体材料SiC和GaN研究态势

Based on bibliometric, national and international research output within 2000~2018 of the third generation of semiconductor material SiC and GaN was collected. Analysis and studies were made in the region of time distribution, research forces and research hotspots. The general international development tendency and scientific research level in China were also discussed. Meanwhile, study directions clustering and burst key words detecting were used to discover and explain the inner law of evolutionary in this field, especially in the different research focus of various development stages. This paper could also provide a reference on research and arrangement in further studies.     

科氏－CCM250E在线粉体流量计在水泥汽车散装系统的应用#br#

介绍了一种新型在线粉体流量计在水泥散灰装车系统的应用，对系统进行了调试操作以及计量数据的对比分析。结果表明，该流量计计量精准、控制系统先进、调节迅速可靠且易于维护，可在水泥企业进行推广应用，以避免超限超载，确保交通安全。     

石油化工行业原油储罐自动切水撬装装置设计及应用

伴随国民经济发展步伐的加快,对油品质量、空气污染的控制要求越来越高,炼化企业规模越来越大,随之储罐的数量急剧增加,采用传统的切水方式(人工现场脱水或机械式脱水器)已经不能满足现代化企业的生产需求。为解决目前石化企业飞速发展与原油储罐切水自动化程度落后的矛盾以及虹吸式、无回油接口储罐的自动切水问题,突破传统设计理念,开发了一种智能环保、故障安全型自动化切水系统,传感器采用冗余配置,能长期安全、稳定运行,现对其设计及应用加以介绍。