Hydroxyl induced eclogite fabric and deformation mechanism

Eclogites from orogens often show strong plastic deformation and high hydroxyl content. We have studied the correlation between crystallographic preferred orientations of garnet and omphacite from natural eclogites with their hydroxyl contents using the electron back-scattered diffraction technique. The results show: 1) Omphacite has typical L-type or SL-type crystrallographic preferred orientations, that is, [001] is distributed in a girdle in the foliation plane with a maximum parallel to lineation; (010) is distributed in a girdle normal to tbe lineation with a maximum parallel to the foliation plane, suggesting a shear dominant deformation regime. Omphacite fabrics do not vary significantly with hydroxyl content, although the hydrous component may cause lower flow strength. 2) Hydroxyl can influence significantly flow properties of garnet in eclogite. Garnets behave as rigid bodies under low temperature and dry conditions. Grain boundary processes will dominate the deformation and lower the flow strength of garnet under high water fugacity conditions. Garnets show no crystallographic preferred orientation in both cases.These results may have important implications for a better understanding of deformation mechanisms and associated fluid activities during deep subduction and exhumation processes.     

羌塘盆地双湖地区古油藏白云岩储层的显微成岩组构特征及意义

根据铸体薄片、阴极发光、扫描电镜观察和荧光显微镜分析,详细地描述了羌塘盆地双湖地区古油藏含油白云岩的显微组构类型和特点.广泛发育的自形白云石环边结构等淡水成因标志表明,该区白云岩化是通过大气水-海水孔隙混合流体交代灰岩形成的,白云岩化过程中晶间孔、晶间溶蚀孔以及溶蚀裂缝发育极大地改善了储层性能和品质.该区白云岩储层可能具有良好的油气勘探前景.     

Flexural Properties of WeftKnitted Fabric Reinforced Composites

Several different kinds of weft knitted fabrics from glass fiber yarns were used as reinforcement to make fabric/ polyester composite laminates. Flexural tests were carried out to examine stress-deflection process and compare the mechanical properties in course and wale directions of these composites. The experimental results indicate that the numbers of load-bearing yarn in course and wale direction and the fabric density are the main factors influencing the ultimate tensile strength and initial elastic modulus of specimens.     

Detection of Fabric Defects with Fuzzy Label Co-occurrence Matrix Set

Co-occurrence matrices have been successfully applied in texture classification and segmentation.However,they have poor computation performance in real-time application.In this paper,the efficient co-occurrence matrix solution for defect detection is focused on,and a method of Fuzzy Label Co-occurrence Matrix (FLCM) set is proposed.In this method,all gray levels are supposed to subject to some fuzzy sets called fuzzy tonal sets and three defective features are defined.Features of FLCM set with various param...     

经编双轴向织物用作涂层基布的性能优势

分别对经编双轴向织物和机织物增强材料的涂层产品进行拉伸和撕裂试验，研究了经编双轴向织物用作涂层基布时的一些性能优势：优异的拉伸性能和抗撕裂性能；较高的纱线强力利用率等等。     

多轴向经编增强复合材料拉伸性能的研究

对经编多轴向织物及层合板的拉伸性能进行了较详细的测试及研究,并与传统的机织物增强材料进行了比较,得出了一些结论,为今后经编多轴向增强材料的应用及发展提供了一定的理论基础。     

热环境中针织面料穿着舒适性影响因素的研究

从人体穿着舒适的要求出发,对热环境中针织面料的穿着舒适性进行了研究,找出影响针织面料舒适性的某些织物结构参数,为功能性织物设计、生产及服装选料提供一定的参考.     

天线罩针刺织物根部结构设计及材料性能研究

针对耐高温天线罩对根部强度及根部材料与金属连接件热膨胀系数匹配性的特殊要求,设计了多种针刺结构石英纤维天线罩织物,并在罩体根部引入氧化铝纤维,系统研究了罩体根部材料的性能情况。结果表明适当降低网毡含量可以提升材料的拉伸性能,但材料的层间剪切强度会有所下降,压缩强度在网毡含量较低的情况下也有所降低。通过在根部引入氧化铝纤维,罩体根部的热膨胀系数有明显提升,但材料的高温拉伸强度随氧化铝纤维含量的增加呈先下降后上升的趋势。文中对相关工艺及材料性能研究为耐高温天线罩的设计提供了参考。