过程工程所流化床直接还原技术研究进展

“双碳”背景下，钢铁工业亟待低碳重塑，氢气直接还原(常称为“氢冶金”)是国内外竞相研发的重要方向。流态化直接还原是过程工程所六十多年来一直坚持的研究方向。值此叶渚沛先生诞辰120周年之际，本综述回顾并概述了过程工程所在流态化直接还原基础理论和工业应用两方面所取得的一系列重要成果。基础理论方面包括颗粒间黏着力与分离力相互竞争黏结机制、聚团流化和慢速失流的发现、不同铁形貌析出机理和黏结特性，以及降低颗粒间黏结力(颗粒包覆改性、调控铁析出形貌)和增大颗粒间分离力(增强颗粒运动、增大颗粒尺寸、施加外场力)等一系列抑制黏结失流方法；工业应用方面包括100公斤/天流化床氢气直接还原、1吨/天钒钛磁铁矿流化床直接还原和千吨级钒钛磁铁矿直接还原-电炉熔分等中间试验，目前正在与鞍钢集团等单位合作开展全球首套1万吨直接还原铁/年流化床绿氢直接还原工程示范。谨以此文缅怀叶渚沛先生、郭慕孙先生等老一辈科学家，以期推动流化床直接还原基础理论和技术研发的进步，为钢铁工业低碳重塑贡献智慧和力量。     

包覆式超细复合粒子的制备

综述了包覆式超细复合粒子的制备技术，包括机械法，异相凝聚法，种子异相聚合法，微乳液和沉积法等，主要介绍了每种制备技术的原理及过程中应注意的问题，并介绍了它们的新发展。     

水化放热曲线在研究铝酸钙水泥和浇注料中的应用

为了预测水泥或浇注料的凝结性和强度发展趋势,取1500g按一定程序搅拌好的水泥胶砂或浇注料,迅速倒入模具中,振动10s后置入j-型热电偶,由计算机绘制出其水化放热曲线。浇注料的水化放热曲线形貌不仅能反映水泥的矿物组成和反应活性,而且能反映浇注料中其他原材料(如骨料、氧化铝或二氧化硅微粉和外加剂等)和作业环境对水泥及浇注料的影响,为此可用于水泥与浇注料流变特性的研究和控制,同时也为浇注料用原材料的甄选提供了一种有用的工具。     

一种基于CloudStack的企业级云资源平台网络优化研究

在对云资源平台的现状进行分析后,提出了一种基于Cloud Stack的企业级云资源平台网络优化方案,通过与现有3种解决方案进行对比,展示了该方案的可靠性和有效性。同时,针对可能存在的风险和不足进行了充分的考虑和论证,并给出了应对措施。     

Analysis of the Insect OS-D-Like Gene Family

Insect OS-D-like proteins, also known as chemosensory (CSP) or sensory appendage proteins (SAP), are broadly expressed in various insect tissues, where they are thought to bind short to medium chain length fatty acids and their derivatives. Although their specific function remains uncertain, OS-D-like members have been isolated from sensory organs (including the sensillum lymph in some cases), and a role in olfaction similar to that of the insect odorant binding proteins (OBP) has been suggested for some. We have identified 15 new OS-D-like sequences: four from cDNA clones described herein and 11 from sequence databases. The os-d-like genes from the Anopheles gambiae, Apis mellifera, Drosophila melanogaster, and Drosophila pseudoobscura genomes typically have single, small introns with a conserved splice site. Together with all family members entered on GenBank, a total of 70 OS-D-like proteins, representing the insect orders Diptera, Dictyoptera, Hymenoptera, Lepidoptera, Orthoptera, and Phasmatodea, were analyzed. A neighbor joining distance phenogram identified several protein similarity classes that were characterized by highly conserved sequence motifs, including (A) N-terminal YTTKYDN(V/I)(N/D)(L/V)DEIL, (B) central DGKELKXX(I/L)PDAL, and (C) C-terminal KYDP. In contrast, three similarity classes were characterized by their diversion from these conserved motifs. The functional importance of conserved amino acid residues is discussed in relation to the crystal and NMR structures of MbraCSPA6.     

Kinetics of the thermal degradation and thermal stability of conductive silicone rubber filled with conductive carbon black

The kinetics of the thermal degradation and thermal stability of conductive silicone rubber filled with conductive carbon black was investigated by thermogravimetric analysis in a flowing nitrogen atmosphere at a heating rate of 5°C/min. The rate parameters were evaluated by the method of Freeman–Carroll. The results show that the thermal degradation of conductive silicone rubber begins at about 350°C and ends at about 600°C. The thermal degradation is multistage, in which zero‐order reactions are principal. The kinetics of the thermal degradation of conductive silicone rubber has relevance to its loading of conductive carbon black. The activation energies are temperature‐sensitive and their sensitivity to temperature becomes weak as temperature increases. In addition, the conductive silicone rubber filled with conductive carbon black has better thermal stability than that of silicone rubber without any fillers. Also, conductive silicone rubber filled with conductive carbon black has better thermal stability than that of silicone rubber filled with the same amount of silica. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 89: 1548–1554, 2003     

新型纳米活性流体协同改变油湿性砂岩表面润湿性的机理

以带正电的碳酸钙纳米颗粒和阳-非离子双子表面活性剂为原料，制备了一种纳米活性流体。通过Zeta电位、红外光谱（IR）、石英晶体微天平（QCM）、接触角测量和自发渗吸实验等方法研究了制得纳米活性流体中碳酸钙纳米颗粒和阳-非离子双子表面活性剂协同改变油湿性砂岩表面润湿性的机理。结果表明，纳米活性流体处理后的油湿性砂岩表面红外光谱中，原油的羰基吸收峰强度低于阳-非离子双子表面活性剂处理后的砂岩表面羰基吸收峰强度；当阳-非离子双子表活剂质量分数均较高时（>0.003%），纳米活性流体中的碳酸钙颗粒促进了双子表面活性剂和原油羧基离子对的形成和解吸附过程，使得纳米活性流体处理过的砂岩表面共振频率变化量（Δf）比阳-非离子双子表面活性剂处理过的砂岩表面Δf小；接触角测定结果进一步确认，纳米活性流体改变油湿性砂岩表面润湿性的效果比单一阳-非离子双子表面活性剂和碳酸钙纳米颗粒效果更好，纳米活性流体中的两种组分起到协同效应。     

荧光法测定N-（α-烷苯氧基）十四酰基牛磺酸钠的临界胶束浓度

研究了一类以苯氧基作疏水支链的新型阴离子表面活性剂——N-（α-烷苯氧基）十四酰基牛磺酸钠（SAPTT）水溶液的紫外吸收光谱、探针（芘）稳态荧光发射光谱及自身稳态荧光发射光谱性质．研究结果表明，荧光探针（芘）法和自身稳态荧光法可用来测定这类表面活性剂的临界胶束浓度（CMC），且测定结果与表面张力法（吊片法）接近；与荧光探针（芘）法相比，对于所研究体系，自身稳态荧光法的灵敏度和准确性均较高，所测得CMC结果与表面张力法（吊片法）能较好地吻合．     

钛系催化剂陈化方式和条件对合成高乙烯基聚丁二烯橡胶的影响

本工艺以Ti(OC4H9)4-Al(i-C4H9)3为催化剂合成乙烯基聚丁二烯，采用催化剂陈化方式，考察了陈化温度和时间等条件对聚合的影响。结果表明，本体系高温陈化后可提高催化活性，降低Al用量；Ti－Bd－Al三元陈化的催化活性高于Ti－Al二元陈化；最佳陈化条件为n（Ti）：n（Bd）：n（Al）＝1：20：20，70℃陈化1h；与未陈化和低温陈化聚合的产物相比，高温陈化产品的分子量和1，2－结构含量较高，凝胶含量较低。     

基于遗传算法的多参数QoS网络路由算法

目前许多应用都有不同的高质量QoS保障需求,但QoS路由问题是一个非常复杂的问题,而且在两条独立的路径之间寻找可行路径是NP难题。同时,高速网络的QoS路由算法必须具有适应性、灵活性和智能性。论文提出了一种基于遗传算法的QoS路由算法,算法中选择两个QoS路由参数进行路由的优化,仿真结果表明该方法比传统的路由算法及单QoS参数的路由算法具有更高的性能。