煤系高岭土资源开发利用现状

介绍了我国煤系高岭土生产现状、存在的问题,论述了我国高岭土市场情况及其在国际贸易中存在的巨大差距,国内外利用煤系高岭土的最新技术动态是合成铝硅合金,在我国已通过鉴定。     

Cyclic stress-strain behavior of shape memory polymer based syntactic foam programmed by 2-D stress condition

Cyclic stress-strain responses of a shape memory polymer based syntactic foam and pure SMP were investigated after a two dimensional (2-D) programming process. Three types of cyclic loading patterns were used: multiple compression-tension cycles at 5% maximum strain, one compression-tension cycle at 40% maximum strain, and one coupled thermo-mechanical cycle at 40% maximum strain. The results indicate that the foams initially harden after the first cycle and then soften in subsequent cyclic loadings, while the pure SMP shows a monotonous softening. The hysteresis loops tend to shrink and approach asymptotically to a steady state before fatigue failure for both the foam and the pure SMP. The programmed foam and the programmed pure SMP are less sensitive to their strain histories, and dissipate more energy as compared with the non-programmed counterparts, showing better fatigue properties at the same strain level. Also, the programmed foam exhibits better mechanical properties under one cyclic thermo-mechanical loading, possessing a good adaptability to ambient temperature changing. Furthermore, the programmed foam demonstrates an increase in yield strength during compression and a decrease in residual tensile stress during tension. These particularly facilitate the programmed foam to be used as a self-healing sealant in expansion joints.     

Shape from focus based on 3D structure tensor using optical microscopy

Shape from focus (SFF) is a widely used passive optical method for 3D shape reconstruction. In SFF, a focus measure, which is used to estimate the relative focus level, plays a critical role in depth estimation. In this article, we present a new focus measure for accurate 3D shape estimation in optical microscopy based on the analysis of 3D structure tensor. First, the 3D tensors are computed from the input image sequence for each pixel. Then, each tensor is decomposed into point, curve, and surface tensors by decomposing tensors into eigenvalues and eigenvectors. Finally, the surfaceness is used to measure the quality of sharpness. The proposed focus measure provides accurate focus values and better resistance against noise. The proposed measure is evaluated by conducting experiments using image sequences of simulated and microscopic real objects. The comparative analysis demonstrates the effectiveness of the proposed focus measure in recovering 3D shape.     

建筑设计中的"面造型"

从建筑形式的构成元素入手,分析其中的"面"与"体"的关系,以认知心理学为依据,从建筑形式中抽象出"面"的概念,提出"面造型"设计方法,并结合近年优秀建筑作品进行造型手法归纳.     

形位公差标注中的常见问题分析

对在形位公差标注中常出现的问题进行了分析探讨，并给出了合理性方案。     

热轧带钢板形质量可视化研究

本文首先对板形质量可视化的方法作了比较,然后介绍了现场板形数据的获取。在对板形数据作了充分分析的基础上,提出一种基于空间点插值和逼近相结合的板形再现方法。接着介绍了板形模型的建立以及板形质量可视化软件的实现,最后用该软件处理的图象与实际检测结果相比较,正确率较高。     

装饰用梅花形黄铜管拉伸成型工艺研究

通过对梅花形黄铜管一次拉伸成型的实验 ,研究了管坯的规格、管坯的状态、延伸系数、拉伸方式、工艺润滑及拉伸速度等工艺因素对梅花黄铜管凸筋高度充填的影响规律 ,这些结论对实际生产有一定的指导意义。     

应用PCR 和单克隆抗体方法从人粪便及肿瘤组织中检测大肠癌基因突变的研究

目的: 检测大肠癌病人粪便中脱落细胞与肿瘤组织细胞的DNA,对比两者K-ras 基因序列和突变位点的变化,为临床非介入性的、简便的大肠癌诊断提供理论和实验依据。方法: 分离和提纯大肠癌组织及粪便中脱落细胞的DNA,用PCR(Polymerase chain reaction)法扩增K-ras基因,克隆K-ras基因PCR 产物并进行DNA序列的测定。免疫组化检测大肠癌相应抗原的表达:采用ELISA法,用大肠癌单克隆抗体对大便样品进行检测。结果: 同一病人的大肠癌组织细胞与粪便中的脱落细胞的K-ras基因的序列完全一致,并检测到1例K-ras基因点突变。K-ras基因突变与否与大肠癌病理类型和大肠癌单克隆抗体检测大便样品中脱落细胞的癌抗原表达水平有一定的相关性。结论: 以大肠癌分子发病机理为基础的非介入性检测粪便中K-ras突变是可行的,有望成为正常人群大肠癌筛查以及诊断的新方法之一,可以为大肠癌的早期发现及监测大肠癌的发生、发展和预后提供理论和实验依据。     

现场总线控制系统在PET瓶片熔融纺短丝生产线上的应用介绍

阐述了现场总线控制系统(Field-bus control system,FCS)的特点以及在涤纶短纤瓶片纺丝生产线电气控制系统上的实际应用。     

盐石膏作硅酸盐水泥添加剂的研究

将海盐废渣提纯后的盐石膏煅烧后作为硅酸盐水泥添加剂，考察了不同煅烧温度下的盐石膏对水泥凝结时间及强度和体积安定性等性能的影响，并与天然石膏对比。结果表明，用盐石膏作添加剂的水泥的凝结时间、3d和28d抗压和抗折强度、体积安定性等性能指标均达到国标要求，海盐废渣作为硅酸盐水泥熟料添加剂可以替代天然石膏。海盐废渣用于水泥熟料既节约了资源又有利于环保，经济效益和社会效益显著。