既有隧道改扩建方案的研究思路

文章结合汕梅高速公路的汤坑隧道设计方案,对既有隧道改扩建方案的思路进行了总结,主要包括既有隧道的病害检测,既有隧道的原位利用、原位改建和原位扩建,另辟位置增建隧道等,尤其针对既有隧道是否能够提速进行了压缩检修道宽度、压缩内侧行车道宽度、压缩两个车道的行车道宽度和同时压缩行车道及检修道宽度四种不同情形的分析,为以后的公路隧道改扩建设计提供宝贵经验。

农业银行县市支行存款提速因素分析及途径选择

本文通过对农业银行宜都市支行筹资情况的调查 ,总结了影响存款持续稳定快速增长的因素 ,指出了加快县市农行存款提速的途径。

An Experimental Investigation on Solid Acceleration Length in the Riser of a Long Circulating Fluidized Bed

Systematic experimental work was conducted to investigate the solid acceleration length in a 16m long circulating fluidized bed riser with fluid cracking catalyst particles over a wide range of operating conditions. A more feasible method is proposed to determine the acceleration length from the measured axial profiles of pressure gradient (or apparent solid holdup). With this new method and large amount of experimental data, a clear picture on the variation of the acceleration length with both solid circulating rate and superficial gas velocity is obtained.It is found that the acceleration length increases generally with increasing solid flow rate and/or decreasing gas velocity. However, the trend in variation of the acceleration length with operating conditions are quite different in different operation ranges. Reasonable explanations are suggested for the observed variation patterns of acceleration length.