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The investigation of pressure drop in moving-beds

CHEN Yunhua, ZHU Xuedong, WU Yongqiang, ZHU Zibin

《化学科学与工程前沿（英文）》 2007年第1卷第2期页码 184-189 doi: 10.1007/s11705-007-0034-4

摘要： The pressure drop of a cross-flow moving-bed was investigated in a two-dimensional rectangular apparatus. The effects of the particle velocity, the superficial gas velocity, the formation and development of cavity/raceway and voidage of particles on the pressure drop were investigated experimentally under the operational conditions of 0.09 1.35 m/s of the superficial gas velocity and 0.95 9.68 cm/min of the particle velocity. The experimental results show that the particle velocity has little influence on the pressure drop, while the phenomena of cavity and pinning occur when the cross-flow velocity is high enough. The development of a cavity or a raceway can result in three types of variations of pressure drop with time: stabilization, slight fluctuation and severe fluctuation. A cavity appears in a process cycle of formation-growing up-collapsing-fluidization at a high gas velocity. On the basis of experimental results, a model for calculating the pressure drop after a cavity occurs and a dimensionless relationship of cavity size is developed, which gives a good qualitative account of the experimental data.

关键词： development cross-flow velocity superficial qualitative account stabilization

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Theoretical analysis and experimental study on the influence of electric double layer on thin film lubrication

WANG Xin-jie, BAI Shao-xian, HUANG Ping

《机械工程前沿（英文）》 2006年第1卷第3期页码 370-373 doi: 10.1007/s11465-006-0040-0

摘要： A new mathematical model for thin film lubrication is established by taking into account the effect of an electric double layer. In the present paper, experiments are carried out on a self-made tester. With a composite block and a

关键词： mathematical account electric composite lubrication

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我国生态文明统计核算方法研究

石庆焱,周晶

《中国工程科学》 2017年第19卷第4期页码 67-73 doi: 10.15302/J-SSCAE-2017.04.011

摘要：

构建生态文明统计核算体系是生态文明建设的基础性工作，可为生态文明建设进程的监测、评估和决策提供可靠的数据支撑。虽然我国目前已有一定的资源环境统计基础，但由于缺少生态文明统计核算的顶层设计，因此无法将这些数据有效整合于统一框架。本文从生态文明建设的实际需求出发，分析了我国在生态文明统计核算中存在的问题，在结合SEEA2012–CF的基础上构建了我国生态文明统计指标体系和核算框架，并就进一步完善我国生态文明统计核算体系提出建议。

关键词：生态文明 SEEA2012–CF 统计体系核算框架自然资源资产负债表环境资产账户