高压静电除垢技术在发电厂汽轮机凝汽器中的应用

汽轮机凝汽器的除垢问题通常采用化学方法或物理方法,这些除垢措施有一定的局限性。介绍了一种利用高压静电除垢技术。     

青藏铁路物资储备基地建设

结合青藏铁路建设物资储备基地的实际情况，探讨了铁路线统购统发材料的管理模式及业务流程，总结出在实际工作中应借鉴的经验和注意的问题。     

复杂连通区域扫描线填充算法的问题及改进

针对复杂连通区域扫描线填充算法可能出现的重复填充错误，分析了产生错误的原因，并给出了相应的改进办法．从而实现了复杂连通区域的快速正确填充。     

白云鄂博主矿开拓运输工艺转换有关问题的探讨

本文对白云鄂博主矿采场铁公路联合运输向公路运输转换位置是否确定为1638m水平以及运输工艺转换过程中相关问题进行分析论证，提出主矿采场铁路至少可向下延深一个水平，技术上可行，节约运费千万元以上。     

唐钢炼铁料场技术改造

料场技术改造的主要项目有 :与扩建一座高炉和一台烧结机相配套的供返料工程、料场改造工程及PL C控制系统改造工程 ;为提高料场的供料能力 ,对工艺流程优化 ,利用创新的方法解决设备缺陷提高作业率 ;利用 90 - 70 PL C CPU替代 SB CPU,满足高炉烧结的生产需要     

水资源承载力量化和评价方法

通过对水资源承载力内涵界定及系统特性分析,在比较各类水资源承载力研究方法不同特点的基础上,提出了水资源承载力分析框架和步骤,构建了量化计算和指标评价相结合的综合分析方法,并深入分析了水资源承载力边界条件的确定原则。     

Influence of Shaping Condition on Etherification Performance of Hβ Zeolite

Etherification reaction of FCC light gasoline over Hβ zeolite was investigated to decrease the light olefins in motor gasoline while enhancing octane. Etherification activity of several molecular sieve catalysts for FCC light gasoline was studied in a fixed-bed reactor. The influence of pore-enlarging agent (PEG) with different molecular weight, binder (γ-Al₂O₃), and peptizing agent (HNO₃) in the shaping process on etherification activity of Hβ zeolite was studied. The impregnating ways of precursor of oxides and the order of extruding and impregnating were also investigated. The results show that the activity of extruded Hβ zeolite before impregnating precursor of oxides is higher than the reverse order. The best shaping condition obtained was PEG-4000 10%, γ-Al₂O₃ 20%, and HNO₃ 10%. At the optimal reaction condition, the conversion of tert-olefins reached the peak. 62.93%, the yield of TAME, is also high and the technology can be applied to industry as well.     

浅析企业应收账款管理

阐述了企业应收账款管理的重要意义,以及在现行市场经济体制环境下,应收账款管理存在的一些问题,并据此提出解决这些问题的措施。     

Preparation and Characterization of Carboxymethyl Chitosan and β-Cyclodextrin Microspheres by Spray Drying

Three kinds of carboxymethyl chitosan/β-cyclodextrin microspheres loaded with theophylline were prepared by spray drying intended for pulmonary delivery. Mucociliotoxicity, permeation rate, and drug release characteristics of the product were investigated. The microspheres obtained by spray drying were found to be spherical with smooth or wrinkled surfaces. The mean particle size was between 3.39 and 6.06 µm. The microspheres demonstrated high product yield (43.7-50.2%), high drug loading (13.7-38.1%), and high encapsulation efficiency (86.9-92.8%). FT-IR indicated that there were interactions of theophylline with carboxymethyl chitosan matrix. Further studies on mucociliotoxicity and permeation confirmed that microspheres had better adaptability and high permeation rate. In vitro drug release from the microspheres was not related to the drug/polymer ratios.     

Computer aided kinetic modeling with KMT and KME

The complexity of many chemical and refining reaction systems and the thus-derived tedious and time-consuming process of building the associated kinetic models have been major obstacles in the use of fundamental kinetics in the solution of chemical engineering problems. This review summarizes work aimed at removing theses obstacles. Our recent work that has led to the enhancement of the Kinetic Modeler's Toolbox (KMT) and the development of the Kinetic Model Editor (KME) presents an end-to-end solution to the kinetic modeling process, including automated feedstock modeling, reaction network construction, kinetic rate estimation, model programming, process system configurations, model customizations, compilations, model execution and results analysis.