摘要：TiO2 pigments are typically coated with inert layers to suppress the photocatalytic activity and improve the weatherability. However, the traditional inert layers have a lower refractive index compared to TiO2, and therefore reduce the lightening power of TiO2. In the present work, a uniform, amorphous, 2.9-nm-thick TiO2 protective layer was deposited onto the surface of anatase TiO2 pigments according to pulsed chemical vapor deposition at room temperature, with Ti Cl4 as titanium precursor. Amorphous TiO2 coating layers exhibited poor photocatalytic activity, leading to a boosted weatherability. Similarly, this coating method is also effective for TiO2 coating with amorphous SiO2 and SnO2 layers. However, the lightening power of amorphous TiO2 layer is higher than those of amorphous SiO2 and SnO2 layers. According to the measurements of photoluminescence lifetime, surface photocurrent density, charge-transfer resistance, and electron spin resonance spectroscopy, it is revealed that the amorphous layer can prevent the migration of photogenerated electrons and holes onto the surface, decreasing the densities of surface electron and hole, and thereby suppress the photocatalytic activity.

摘要：本文通过34个外伸梁试验,研究了钢筋在反弯点区段的锚固性能。对粘结破坏特征、破坏机理及其影响因素进行了分析。提出的粘结强度计算公式与国外试验结果作了对比,符合较好。文中还给出了延伸长度计算公式。本研究成果为《混凝土结构设计规范》的修订提供了试验依据。

摘要：介绍了靖远煤业集团公司机械制修厂模具实施项目管理与并行工程的经验,论述了模块化设计方法在模具设计中应用的特点,研究了模具模块化CAD系统的开发技术。

摘要：采用现代激光技术和光电子技术，根据晶体光学原理与非线性光学晶体的习性，设计了非线性光学晶体多功能测试系统。本系统具有结构紧凑，稳定可靠，一机多能的测试功能。

摘要：为解决动物图像分类识别问题,提出了一种基于颜色特征的动物图像分类识别方法。该方法很好地利用了颜色直方图和低阶统计矩的属性。首先确定选择HSV颜色空间,依据图像的颜色直方图特性调整低阶统计矩数值作为特征描述量,再通过K近邻方法判断图像所属类别,并构建仿真系统。实验另外对比了组合类与单一类特征在识别准确率上的差异。实验表明,该方法能较有效地识别出不同种类的动物,平均正确识别率可达89%。仿真系统具有实用性,组合类特征可在一定程度上提高识别准确率并降低识别时间。