CSP低碳铝镇静钢水可浇性控制

通过钢液-夹杂物的热力学基本理论,利用活度相互作用系数和Bjorkvall方法分别计算了CSP流程低碳铝镇静钢中钢和夹杂物的成分,详尽地分析了CaO-Al2O3二元系中中间相3CaO·Al2O3,CaO·A12O3,液态12CaO·7Al2O3和CaS夹杂的热力学性质,同时分析了钙处理过程中生成液态铝酸钙夹杂物,避免CaS夹杂析出的条件.模型的结果与工厂试验结果相符合.     

纳米尖晶石NiMn2O4的合成、表征及热分解动力学

用室温固态一步反应法制取纳米尖晶石NiMn2O4的前驱体NiMn2(C2O4)3·6H2O,经烧结,最终得到尖晶石相氧化物.通过IR、XRD证实了其为尖晶石结构,且用TEM表征了其最终产物的颗粒大小达到了大约10nm.通过TG、DSC技术,探讨了样品的基本组成及由前驱体分解成最终产物的反应动力学,寻找出了一定的规律.     

燃烧法合成长余辉材料CaWO4:Eu3+及其发光性能

为探索用燃烧法合成掺加SiO2的长余辉材料CaWO4∶Eu3 ,以H3BO3为助熔剂,NH4NO3为氧化剂,柠檬酸(CA)为还原剂,掺加正硅酸乙酯(TEOS),研究了NH4NO3,柠檬酸,TEOS的最佳添加量及其对长余辉发光材料的发光性能的影响.使用X射线衍射仪,荧光/磷光发光分光光度计测试了其晶相,激发和发射光谱以及发光强度.X射线衍射检测结果表明:在500℃时得到CaWO4∶Eu3 长余辉材料,800℃的发光效果相对最好.荧光/磷光发光分光光度计检测结果表明:最佳摩尔比nCa2 ∶nCA∶nNH4NO3∶nTEOS是1∶2.75∶20.63∶5.添加TEOS能显著提高CaWO4∶Eu3 的发光性能.     

Comparative analysis of the three-dimensional structure of Periplaneta fuliginosa densovirus

The three-dimensional structure of Periplaneta fuliginosa densovirus(pfDNV)is determined at 2.3nm resolution using the techniques of cryo-electron microscopy and image reconstruction.The pfDNV contains five structural proteins and 60 protein subunits arranged on a T=1 icosahedral shell with a relatively smooth surface.Its reconstruction reveals its distinct capsid structure from those observed in CPV and GmDNV.As in GmDNV,spike-like protrusions are not present in pfDNV at the threefold axes; while two small thorn-like protrusions are identified there However,different from CPV and GmDNV,cylindrical channels along the fivefold axes are closed in pfDNV;while a small thorn-like protrusions,which have not been reported in other parvovirus,are observed there in pfDNV although their function is yet to be investigated.The pfDNV has dimple-like depressions at the icosahedral twofold axes;but has no canyon-like regions encircling the fivefold axes.The icosahedrally well-ordered nucleic acid has also been observed in pfDNV,suggesting that the protein and nucleic acid probably form closed interaction.     

Study on the Relation between Individual Layer and Multi-layered Nonwoven Geotextile Permeability

Water permeability is an important property of nonwoven geotextiles used in drainage field, and usually it is obtained by testing individual layer or multi-layered nonwoven geotextiles. However, the permeability coefficient tested by using different layers would be different for the same nonwoven geotextile. In this paper, the relation between them is studied based on Darcy's law. The study shows that vertical permeability coefficients are theoretically invariable no matter how many layers are tested; but experimental results show that vertical permeability coefficients decrease with the increase of nonwoven geotextile layers number.     

Enhancing Biological Wastewater Treatment with Chitosan

Chitin and chitosan have been applied to biological wastewater treatment. From a number of parallel comparison experiments, it can be concluded that the application of chitin and chitosan can both enhance the biological treatment, besides which chitosan is more efficient than chitin. The study on the enhancement mechanism reveals the difference between the two additives:chitosan improves the sludge structure and settlibility, while chitin acts as a kind of carrier for microorganism in the biological treatment system.     

轮式机器人用动力型铅酸电池模型的研究

动力型铅酸电池是轮式移动机器人新型动力能源，本文首先介绍了铅酸电池模型研究中的主要目的，提出了静态和动态铅酸电池模型的概念，其次对当前铅酸电池研究的方法作了归纳和总结，对动力型铅酸电池的模型研究的主要方法电路网络模拟理论作了概要的描述。针对铅酸电池模型研究中所特有的非线性、复杂性和对环境敏感性，提出了用人工智能和智能控制领域中的“黑箱”理论、神经元网络理论以及自适应的思想来解决的基本途径和方法。     

蓝色无机颜料的研制

这种蓝色无机颜料是以分子筛作为原料,再与其它物质混合后加以煅烧而成。 蓝色无机颜料,色泽鲜艳,化学稳定性好工艺简单,容易生产。     

植物学文献检索工具简介

本文简要地介绍植物学文献的检索工具。在每一个检索工具中分别概要地描述了各出版单位、检索内容、检索方法等。     

乙苯脱氢制苯乙烯反应系统能量模型与分析

运用复杂系统能量传递-转换模型,对乙苯在绝热式反应器中脱氢制苯乙烯反应系统作(火用)分析,用系统(火用)流图代替结构特性,可简化对系统的分解与数学运算,并建立该系统的能量模型。推导了系统总(火用)效率与能量单元(火用)效率相互关系的表达式,探讨了高温焓(火用)与低温焓(火用)的概念,计算出系统总(火用)效率、各能量单元(火用)效率与能量单元(火用)效率贡献系数,确定节能的主攻方向。分析结果与工厂实际数据基本相符。