α-烯基聚醚磺酸盐的耐盐性能及应用

以不饱和醇作引发剂利用双金属氰化物(DMC)催化加成共聚环氧丙烷、环氧乙烷,然后磺化中和成盐,研制出一种耐盐活性剂.该活性剂的耐受矿化度范围为2000～150000 mg·L-1.该活性剂不仅能把高矿化度水的表面张力从80.5 mN·m-1(30℃)降到37.1 mN·m-1(30℃),而且即使水中的Ca2 、Mg2 浓度高达10000 mg·L-1时,其表面活性剂水溶液也是无色透明的,没有任何沉淀和絮状物.在某油田稠油水中矿化度高达150000 mg·L-1的稠油降黏实验中发现,该活性剂能使含水稠油黏度从85000 mPa·s(30℃)降到14 mPa·s(30℃),并且还能使脱水后的原油本体黏度降低一半以上.     

基于动态PLS框架的多回路内模控制器设计(英文)

In this paper, a multi-loop internal model control (IMC) scheme in conjunction with feed-forward strategy based on the dynamic partial least squares (DyPLS) framework is proposed. Unlike the traditional methods to decouple multi-input multi-output (MIMO) systems, the DyPLS framework automatically decomposes the MIMO process into a multi-loop system in the PLS subspace in the modeling stage. The dynamic filters with identical structure are used to build the dynamic PLS model, which retains the or-thogonality among the latent variables. To address the model mismatch problem, an off-line least squares method is applied to obtain a set of optimal filter parameters in each latent space. Without losing the merits of model-based control, a simple and easy-tuned IMC structure is readily carried over to the dynamic PLS control framework. In addition, by projecting the measurable disturbance into the latent subspace, a multi-loop feed-forward control is yielded to achieve better performance for disturbance rejection. Simulation re-sults of a distillation column are used to further demonstrate this new strategy outperforms conventional control schemes in servo behavior and disturbance rejection.     

ICP-MS法同时测定金属包装材料中8种可溶性有害元素

建立了电感耦合等离子体质谱(ICP-MS)法同时测定金属包装材料中砷、钡、镉、铬、铅、锑、硒、汞等8种可溶性有害元素的分析方法,全面考察了消解剂种类及其用量、内标元素的选择及方法的干扰等影响其测量的各种因素,确定了最佳的实验测定条件。方法的检出限为0.03~0.18μg/L,相对标准偏差(RSD)小于5%,加标回收率为87.4%~118.1%。采用该法对金属包装材料实际样品进行了分析,结果表明,此方法简单、准确、重现性好。     

基于能耗监测系统的建筑用电分析及节能探讨

通过某科研院能耗动态监测系统建设实例,对该院办公实验楼各分项电耗计量数据进行分析并探讨节能方法,有针对性地提出节能方向和部分节能措施,通过节能管理和改进措施可节省年耗电量1.3×105kWh,占该院总耗电量的10.5%,达到了节能减排的目的。     

建筑基桩检测力值参数及其不确定度评估

本文对基桩静载试验力值参数及其不确定度评定进行分析说明,可作为基桩工检测时参考.