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PDMX32A型上挂式移动模架造桥机施工原理
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作者 史鹏飞 李俊 《山西建筑》 2007年第13期338-339,共2页
为适应灵江特大桥高墩、不同墩宽、跨越省道河流等特点,详细介绍了PDMX32A型上挂式移动模架造桥机的构造和制梁工作原理及工艺流程,给出了其详细的技术性能参数,具有广泛的推广价值。
关键词 pdmx32A移动模架造桥机 下承式 简支梁 模架
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PDMX32A型上挂式移动模架造桥机施工原理 被引量:1
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作者 张育松 《建筑技术》 北大核心 2015年第S1期3-5,共3页
为适应青高特大桥高墩、不同墩宽、跨越道路河流等特点,详细介绍了PDMX32A型上挂式移动模架造桥机构造和制梁工作原理及工艺流程。
关键词 pdmx32A移动模架造桥机 下承式 简支梁 模架
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可编程数字复用器PDMX
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作者 田向东 《铁道通信信号》 1992年第8期18-19,共2页
关键词 铁路通信 可编程复用器 pdmx
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Preparation of an amphoteric flocculant having both high polymer content and low viscosity and its polymerization kinetics 被引量:3
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作者 Shenwen Fang Manlin Wang +3 位作者 Zipei Xu Lei Zhai Xiujun Wang Yan Xiong 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2019年第1期130-135,共6页
It is not easy for liquid cationic flocculant diallyldimethyl-ammonium chloride(DM) homopolymer to simultaneously exhibit both low viscosity and high polymer content, which limited its application in offshore oilfield... It is not easy for liquid cationic flocculant diallyldimethyl-ammonium chloride(DM) homopolymer to simultaneously exhibit both low viscosity and high polymer content, which limited its application in offshore oilfield.In this paper, sodium allylsulfonate(XS) and sodium formate were used in the aqueous solution polymerization of DM.An amphoteric flocculant(PDMXS) with the properties of high polymer content(about 55 wt%) and low viscosity(efflux time measured by an Apply 4 viscometer was less than 100 s) was prepared.The optimum reaction conditions were identified as follows: the mass ratio of XS/DM was 10 wt%, the concentration of sodium formate was 2000 mg·L^(-1), reaction temperature was 55 ℃, the concentration of KPS was 0.5 wt% and the reaction time was 4 h.The polymerization kinetics was discussed.The results showed that R_p∝ [M]^(1.97)[I]^(0.68)[CTA]^(0.71) and the apparent activation energy was 72.55 kJ·mol^(-1). 展开更多
关键词 diallyldimethyl-ammonium chloride(DM) pdmxS
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