试论我国解放后炼铁技术路线

本文简要回顾建国以来我国炼铁技术路线的演变过程，并展望２１世纪的前景。     

连轧管生产工艺的演变与选择

介绍了浮动芯棒、限动芯棒和三辊式限动芯棒连轧管工艺的发展历程。分析了各种型式连轧管机的适用条件；并认为，各种机型装备的发展与市场需求紧密相关，单纯从技术上考虑，而追求同一机型不能带来良好的经济效益     

并捻器成型工艺及模具设计

在仔细分析并捻器零件工艺特点的基础上 ,设计制造了并捻器压铸模 ,针对压铸过程中遇到的问题对模具进行了改进 ,并对铝合金原材料和铝合金的熔炼过程进行了重点控制 ,取得了良好的效果。     

从第八次全国热处理大会看我国热处理技术发展的热点

对第八次全国热处理大会的大会报告和交流论文进行了概述和分析，并就有关我国热处理技术发展的热点问题提出了笔者的一些见解。     

建筑供排水用聚丙烯管道(PP-R)特性简析

PP -R管道具有质轻、连接方便、良好耐热性和较小导热系数、耐腐蚀且管道阻力小等优点 ,属绿色产品 ,本文对施工过程中就PP -R管与混凝土的粘结不密、抗紫外性能差等问题提出了相应的处理措施     

ON THE UNIMODALITY OF THE EXACT LIKELIHOOD FUNCTION FOR NORMAL AR(2) SERIES

Abstract. For stationary second-order autoregressive normal processes, the conjecture of uniqueness of the solution of the exact likelihood equations is examined. A sufficient condition for uniqueness is given; this condition is satisfied with very high probability if the number of observations is not extremely small. Moreover, it is shown that not more than two maxima may exist. Examples of data which actually produce a likelihood function with two local maxima are given.     

Influence of the composition of the binder and the carbonation on the zeta potential values of hardened cementitious materials

Electroosmotic experiments have been carried out on eight different mixes of hardened cementitious matrixes including concrete, mortar and pastes, different types of binders, carbonated and non-carbonated specimens and different test conditions. From these trials, the zeta potential values have been determined and the optimum experimental parameters and devices have been established. In addition, the influence of the composition of the binder on the zeta potential has been quantified indicating that higher amounts of Al₂O₃ in the binder lead to higher positive values of zeta potential, while the SiO₂ acts just on the opposite side. This has been explained in terms of the different i.e.p. (isoelectric point) for both oxides. Concerning the influence of carbonation, it increases the absolute value of the zeta potential toward more negative values; this behaviour has been attributed to the influence of the specifically adsorbed Ca²⁺ in the negative sites of the surface in the non-carbonated samples.     

多孔塑料管材挤出工艺和机头模具

扼要介绍了多孔塑料管材的用途、性能、制造方法、配方、生产工艺和机头模具的设计     

“车家宝”胶在制氧机超低温管路漏气上的应用

本文对“东家宝”胶在制氧机超低温管路漏气上的应用作了简要的介绍。