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10篇 您的检索式:作者名="Christopher Parr"
    题名 作者 年代 出处 被引量
1氧化铝微粉与减水剂对刚玉质浇注料施工性能的影响显示文摘研究了减水剂(包括六偏磷酸钠和萘系、三聚氰胺类及聚羧酸盐类3类减水剂)、氧化铝微粉(包括烧结氧化铝微粉和活性氧化铝微粉)对纯铝酸钙水泥结合刚玉质浇注料的流动性能和力学性能的影响。结果表明:1)氧化铝微粉的平均粒度对浇注料的流动度有较大的影响,在一定范围内,粒度越粗,浇注料的初始流动性越小,可工作时间越短。2)氧化铝微粉中可溶性碱性氧化物的含量对浇注料的施工性能和可工作时间有一定的影响。3)减水剂既影响浇注料的需水性,还影响浇注料的强度发展,必要时需引入缓凝剂或者促硬剂进行调节。4)综合比较萘系、三聚氰胺类及聚羧酸盐类3类减水剂,以聚羧酸盐类减水剂的减水效果较好。李文平 刘学新 李斌 Christopher Parr 2009耐火材料2009,43,6:5
2铝酸盐水泥结合耐火浇注料表面损毁的原因分析及对策显示文摘李斌 孙加林 刘学新 Christopher Parr 2009耐火材料2009,43,5:2
3Implementation of a comprehensive blood conservation program can reduce blood use in a community cardiac surgery program显示文摘Steve Xydas Christopher J. Magovern James P. Slater John M. Brown Rami Bustami Grant V. Parr Robert L. Thurer 2012The Journal of Thoracic and Cardiovascular Surgery2012,,4:1
4低水泥浇注料中纯铝酸钙水泥和SiO2微粉的“老化”试验显示文摘为了探讨纯铝酸钙水泥结合的低水泥浇注料'老化'的原因和影响因素,将SiO2微粉以及不同粒度、不同物相组成(CA相含量)、不同新鲜程度的纯铝酸钙水泥在温度为(20±1)℃、相对湿度>75%的潮湿环境中摊成厚度为2.5 cm左右的料层,放置一定时间(分别为0、3、7、14、28 d)使其老化,然后分别将它们与特级矾土(≤5、≤0.088 mm)、磷酸盐分散剂和减水剂等其他原料一起配制成浇注料,通过测定浇注料的可工作时间、初始流动性和早期(6 h)养护强度,来表征这些原料的老化速度。结果表明:(1)纯铝酸钙水泥的CA含量和细度越高,其老化速度越快。(2)'新鲜'的铝酸盐水泥比存放一段时间后的水泥的老化速度更快。(3)SiO2微粉的老化会导致浇注料的流动性变差,可工作时间变短。李斌 陈俊红 孙加林 Christopher Parr 刘学新 2009耐火材料2009,43,2:1
5The effect of environmen- tal temperature conditions on the rheology of deflocculat- ed refractnl~ tastable 显示文摘Charles Ah Christopher Parr 2009Refractolies Applications and News2009,7,1:1
6Cerebral Oxygen Desaturation Predicts Cognitive Decline and Longer Hospital Stay After Cardiac Surgery显示文摘James P. Slater Theresa Guarino Jessica Stack Kateki Vinod Rami T. Bustami John M. Brown Alejandro L. Rodriguez Christopher J. Magovern Thomas Zaubler Kenneth Freundlich Grant V.S. Parr 2009The Annals of Thoracic Surgery2009,,1:1
7Does the current Clean Development Mechanism (CDM) deliver its sustainable development claim? An analysis of officially registered CDM projects显示文摘Christoph Sutter Juan Carlos Parre?o 2007Climatic Change2007,,1:1
8Self-glazing SiC-andalusite Refractories for High Temperature Gasification Applications显示文摘The combination of SiC and andalusite with calcium aluminate binder for castables in high corrosive gasifying environments is a promising alternative refractory system for many different slag systems. After sintering,a glassy protective layer has been identified. Beside the interactions of the refractories with intermediate slag also the thermomechanical properties,the thermal shock performance and the microstructure have been evaluated as a function of different binder systems.Patrick GEHRE Christos G.ANEZIRIS Christopher PARR 2015China's Refractories2015,24,1:1
9肺PET图像的定量分析:挑战和机遇显示文摘数百万人受呼吸系统疾病的影响,导致巨大的全球性健康困扰。由于目前对导致呼吸系统疾病发展和进展的潜在机制认识不足,治疗选择仍然有限。为克服此局限和理解相关分子变化,将无创影像技术如PET和SPECT用于探索生物标志物,其中18F-脱氧葡萄糖(FDG)PET显像的研究最多。由于肺内组织、气体、血液和水的构成比变异,定量分析肺的分子影像数据仍具挑战性。这些成分的比例随着肺部疾病的不同而不同,因此有不同的定量分析方法来显示这种变化,但迄今为止还没有开发出对数据标准化的方法。该文回顾了肺部疾病中18F-FDG PET定量分析方法的数据,聚焦于解释肺内成分变化的方法,解读衍生参数。分析的疾病包括急性呼吸窘迫综合征、慢性阻塞性肺疾病、肺间质性疾病如特发性肺纤维化。基于对既往文献、进行中的研究以及作者间讨论的回顾,作者提出了建议性的注意事项,以协助解读从这些方法及未来研究设计中衍生的参数。陈聪霞(译) 李文婵(译) 郭悦(译) 姚稚明(审校者) Delphine L.Chen Joseph Cheriyan Edwin R.Chilvers Gourab Choudhury Christopher Coello Martin Connell Marie Fisk Ashley M.Groves Roger N.Gunn Beverley F.Holman Brian F.Hutton Sarah Lee William MacNee Divya Mohan David Parr Deepak Subramanian Ruth Tai-Singer Kris Thielemans Edwin J.R.van Beek Laurence Vass Jeremy W.Wellen Ian Wilkinson Frederick J.Wilson 2019中华核医学与分子影像杂志2019,39,11:0
10'In-situ Recycling' :Monolithic Ladle Repair with Shotcreting显示文摘The service life of refractories in ladle walls is limited by corrosion,abrasion,thermal shock and structural spalling mechanisms. When the ladle is lined with bricks they typically need to be completely removed after a certain number of heats to be replaced by new bricks of the same size as the original bricks. Not so for monolithic ladle linings. At the end of their service life the remains of the castable can almost completely be recycled as they can in fact stay in place. Only the worn-out part of the lining has to be replaced by a new castable. 20%-50% of the initial ladle lining can be recycled 'insitu'. The installation can efficiently be done by shotcreting technics. But it requires a castable that resists slag penetration very well. Castables based on a calcium magnesium aluminate bond provide the required penetration resistance. Pumping and shotcreting is very well adapted for repairs of blast furnace shafts,torpedo cars,hot metal and steel ladle linings[1]. However,very little is published about how a good pumping and shotcreting performance can be achieved when the installation has to be done under extreme weather conditions. At high ambient temperature the challenge is to ensure a good pumping result without early castable stiffening. Blockage of the pump would be the consequence. At low ambient temperature the difficulty is to de-activate the highly efficient deflocculant fast enough with a gelling agent added intothe wet mix at the nozzle to prevent the gunned material slipping off the wall. This paper studies strategies how to achieve good installed properties even at extreme ambient temperatures. The interactions between deflocculants,retarders,gelling agents,and calcium magnesium aluminate binder as a function of temperature are studied for an alumina- spinel ladle castable. Beside a new gelling agent for this castable type also a special stabilizer to reduce the temperature sensitivity has been investigated. It will be highlighted how the use of the new calcium magnesium aluminate binder in ladle castables and shotcretes maximises their service life and minimises material consumption.Christoph WHRMEYER Christopher PARR Fabien SIMONIN Bin LI Susan Li Simon GAO Magali SZEPIZDYN Jim FARRELL Scott KNIGHTON 2015China's Refractories2015,24,1:0
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