FBE复合覆盖层天然气管道外防腐施工实践

简述了天然气集输设施腐蚀的危害。结合工程实践。介绍了FBE复合覆盖层天然气管道外防腐施工方法及施工工艺，从防腐材料的选择、施工环境温度的控制、涂料的配制等方面对施工技术措施及质量控制要点进行了重点阐述。     

高频等离子体化学气相淀积法制备TiO2超细粒子

利用ＴｉＣｌ４＋Ｏ２体系，在高频等离子体化学气相淀积反应器中合成了纯度高、粒度细的ＴｉＯ２粒子。考察了工艺条件对ＴｉＯ２粒子物性的影响；探讨了ＴｉＯ２粒子晶型控制的方法，金红石型质量分数可通过工艺条件控制；探讨了ＴｉＯ２粒子晶型控制的方法。金红石型质量分数可通过工艺条件控制，减少ＴｉＯ２单体浓度可提高金红石型质量分数；也可通过在原料ＴｉＣｌ４中添加ＡｌＣｌ３等晶型转化剂，使可转化为单一金红石型Ｔｉ     

一种短波电台频率合成器的研制

该文介绍一种采用Ｍｏｔｏｒｏｌａ公司ＭＣ１４５１４６和ＭＣ１２０１７／１８蕊片构成的短波电台频率合成器的硬件电路实现方案。频率合成器的输出频率范围２～２９．９９９９ＭＨｚ，频率间隔１００Ｈｚ，换频时间小于０．０１ｓ。文中论述了这种多环数字式频率合成器工作原理，各环路之间对应的频率关系和电路参数的选择，给出了频率合成器的试验结果．     

Manganese(II) complexes with diethylamine in aqueous solutions

Interaction between MnCl₂ and diethylamine (DEA) in aqueous solutions has been studied by UV, IR, and EPR spectroscopy as part of the design and research program on models of natural photosystems. The composition of the precipitate for comparable concentrations of reagents and solute oxygen has been investigated. Mn(II) was found to be oxidized with oxygen to give MnO₂·H₂O as a precipitate. In the solution over the precipitate, Mn(III) complexes with DEA are formed; the complex molecule has four and six amine molecules in the coordination sphere.     

巷旁充填沿空留巷技术研究

本文通过转Ⅳ喷射机组成的风力充填系统输送矸石——水泥胶凝混合料的巷旁充填研究,介绍了该技术在沿空留巷中应用及效果,并对改进提出了建议。     

碗扣式多功能脚手架CO2气体保护自动焊机

采用CO2气体保护焊工艺研制了碗扣式多功能脚手架CO2气体保护自动焊接设备，在零部件尺寸不规范的条件下，利用电、气动机构实现多个工件的同时准确自动装卡及自动焊接，焊缝成形好，质量稳定，提高了生产效率，节约了能源及4／5的劳动力。     

服装定价的特殊性与双价值模型

通过对服装价格影响因子及服装价格决策特殊性的分析，建立以认知价值和使用价值为基础，以品牌、质量和季节转换等因子为权重调节系数的服装双价值模型。     

Natural Operators Lifting Vector Fields to Bundles of Weil Contact Elements

Let A be a Weil algebra. The bijection between all natural operators lifting vector fields from m-manifolds to the bundle functor K ^A of Weil contact elements and the subalgebra of fixed elements SA of the Weil algebra A is determined and the bijection between all natural affinors on K ^A and SA is deduced. Furthermore, the rigidity of the functor K ^A is proved. Requisite results about the structure of SA are obtained by a purely algebraic approach, namely the existence of nontrivial SA is discussed.     

Stability of Markovian structure observed in high frequency foreign exchange data

Contrary to the common sense in economics and financial engineering, price fluctuations at very fine level of motion exhibit various evidences against the efficient market hypothesis. We attempt to investigate this issue by studying extensive amount of foreign currency exchange data for over five years at the finest level of resolution. We specifically focus on the proposed stability in binomial conditional probabilities originally found in much smaller examples of financial time series. In order to handle very large data, we have written an efficient program in C that automatically generates those conditional probabilities. It is found that the stability is maintained for extremely large time duration that covers almost the entire period. Based on the length of conditions for which the conditional probabilities are distinguishable each other, we identify the length of memory being less than 3 movements.     

环保材料在包装设计中的应用

论述了包装设计中导致的环境污染问题,分析了自然材料所具有的优越性,探讨了自然材料在包装中的设计体现。