搅拌设备设计的几点体会

从搅拌轴的支承条件、轴承间最佳距离的确定以及搅拌轴的稳定器等几个方面讨论 ,分析了其对搅拌设备设计的影响 ,并提出了相应的措施和方法。     

材料在红色旅游景区导视系统中的情感表达

随着人们情感需求的日益膨胀,导视系统也不再仅仅只关注于功能性。更需要关注它与任何环境之间的关系,做情感化设计。尤其红色旅游景区,导视系统更应该凸显其艺术性,注重人们的心理感受。与景区格调一致。完美烘托主题。而材料是事物的基础及艺术的载体。文章通过对常用材料情感特征进行分析研究。结合红色景区的特点,探索适于红色景区导视系统情感表达的材料。     

利用铝厂污泥合成莫来石/刚玉复相材料

采用铝型材厂污泥和粘土为原料合成莫来石刚玉复相材料，主要探讨不同Al2O3／SiO2比值对形成的晶相结构影响。采用XRD和SEM表征各样品的晶相，结果表明各样品都形成2种晶相：莫来石固溶体和刚玉相，其中No．2配方中莫来石和刚玉的比例为：71．6：28．4，莫来石在扫描电镜下呈柱状交织，为较佳配方。     

理论力学演示型多媒体课件素材的选取与制作

本文主要论述了理论力学演示型多媒体课件素材选取的基本原则、素材制作和集成方法。     

提高MG2×150/700-WD型采煤机截割部轴承寿命周期的设计改进

通过改进结构及轴承类型,提高MG2×150/700-WD型交流电牵引采煤机截割部轴承使用周期。     

“讲授法”在职工教育中的运用管窥

讲授法是一种主要的教学方法,其主要任务是教师通过口头语言向学习者传授知识和技能,进行思想政治和学习教育。这种方法在教育职工中得到广泛运用。要运用好这种方法,应认真把握以下四个主要环节:一是抓好教学内容的科学性;二是抓好教学过程的启发性;三是抓好教学语言的艺术性;四是抓好教学组织的和谐性。     

实施ERP提升油田企业物资管理水平

物料是油田企业各项生产经营活动正常运行的物资基础和保证。对原有物资管理模式滞后性进行了剖析,ERP物资管理信息系统改变了油田原有的物资管理模式,管理效率和经济效益得到显著提高。为进一步提升油田企业物资管理水平,提出了相应措施。     

Continuous ethanol production from wood hydrolysate by chemostat and total cell retention culture

Chemostat and total cell retention cultures with internal filter system ofSaecharomyc.es cerevisiae H1-7 were carried out to produce ethanol from wood hydrolysate. Maximum ethanol productivity obtained in a chemostat with the aeration rate of 1 vvm was 3.79 g/(L·h). This was 20% higher than that in a chemostat without aeration. However, the substrate was not completely consumed at the dilution rate with the maximum productivity. The realistic productivity, which has higher than 99% conversion rate of substrate, was. 2.95 g/(L·h). The maximum productivity in the total cell retention culture was 6.65 g/(L·h) at the dilution rate of 0.19 h¹ and the residual glucose concentration was negligible.     

Ozonation of Humic Substances: Effects on Molecular Weight Distributions of Organic Carbon and Trihalomethane Formation Potential

Four different sources of humic substances were studied to determine the effects of ozonation on molecular weight-distributions, based on dissolved organic carbon (DOC) and trihalomethane formation potential (THMFP). Solutions of two soil-derived fulvic acids and a one soil-derived humic acid, as well as dissolved organic matter (DOM) associated with a natural water source were studied. Both gel permeation chromatography (GPC) and ultrafiltration (UF) were employed to define apparent molecular weight (AMW). Applied ozone doses ranged from 2.0 to 2.5 mg O₃/mg DOC. Overall samples of untreated and ozonated waters, as well as individual molecular weight fractions, were characterized according to DOC, UV absorbance, and THMFP. Ozonation resulted in a significant disappearance of higher AMW material with a corresponding increase in lower AMW material. Although little overall reduction in DOC concentration was observed, significant overall reductions in UV absorbance and THMFP levels were observed.     

超支化聚合物用于材料制备和改性的研究

综述了近年来超支化聚合物在聚合物增韧、增塑、粉体填料的表面改性以及制备纳米粒子和纳米复合材料等方面的研究进展。