管带式热交换器真空钎焊工艺及影响钎焊质量的因素

主要介绍了铝热交换真空钎焊工艺，铝及铝合金真空钎焊的去膜机理，管带式热交换器常用材料和制造工艺。并结合本公司的生产实际情况，详细探讨了影响真空钎焊质量的因素。     

钢质管道表面火焰熔覆玻璃涂层

研究了在钢质管道表面采用氧气－石油天然气火焰熔覆玻璃涂层的工艺。试验表明，选择合适的预热温度，送粉量，保护及密着剂可以获得均匀，无裂纹，密着性良好的耐蚀喷瓷管道。．     

A simple method for the inclusion of external and internal supports in the spline finite strip method (SFSM) of buckling analysis

The SFSM is an attractive numerical technique for the buckling analysis of folded-plate structures where general loading regimes and boundary conditions need to be modelled. In implementing splines as interpolation functions in the longitudinal direction of the strip, amended splines have been used conventionally to model the variety of end conditions that may occur. These amended splines are fairly difficult to implement, particularly so if internal restraints are also to be specified. A simple technique for replacing the specification of dedicated amended splines is presented in this paper. The method is then employed to study the local buckling of flat plates under longitudinally and transversely varying compression and bending with different boundary conditions at the ends.     

鞍钢热轧带钢厂总体改造工程除鳞系统设计与研究

介绍了鞍钢热轧带钢厂１７８０ｍｍ总体改造工程概况，除磷系统的设备组成、工艺参数的确定以及系统的控制过程，并总结了除鳞系统设计中的经验。     

横向铸造结晶器的改进

介绍一种用机械套装的热顶代替传统的手工制作的喇叭碗或硅酸铝纤维套的结晶器。具有使用寿命长、经济效益好，更有利于抑制铸锭偏析瘤的特点。同时铸造温度范围更宽，铸造速度可达２２０ｍｍ／ｓ。     

The analysis and control methods of profile irregular on 1580 mm hot rolling mill

The profile quality of hot strip will affect the quality of cold strip,therefore,it is one of key quality fields which needs improve.In this paper,three kinds of profile irregular defects of hot rolling strip were discussed based on the production experience.Through profile,rolling,work-roll's wear and simulation methods,this paper discovered the reasons of these quality defects.Meanwhile,the ways to deal with these defects were presented and have been proved effectively.Decrease the number of narrow str...     

A framework for the development of videogames

A framework is a high‐level solution for the reuse of software pieces, a step forward in simple library‐based reuse, that allows the sharing of not only common functions but also the generic logic of a domain application. It also ensures a better level of quality for the final product, given the fact that an important fraction of the application is already found within the framework and has therefore already been tested. This case study takes the systematic generation of hot‐spot subsystems approach as a reference point to describe the underlying concepts in the design of a framework for the development of 2D action videogames for low‐performance machines. The main goal of this paper is to show the applicability of framework‐based reuse to videogames. Both standard and framework‐based game implementations are compared and the results are analysed. Special attention is paid to the (potential) benefits that the use of frameworks brings to the fulfillment of maintenance tasks along the game's life cycle, a stage that normally consumes most resources in software projects. At the end of the paper, based on the implementation results, this study shows the predicted conditions under which building a framework is cost effective for the development of videogames similar to the ones from the studied domain. Copyright © 2001 John Wiley & Sons, Ltd.     

Performance enhancement of an integrated collector storage hot water system

Integrated collector storage (ICS) systems offer a solution to reduce the height of the conventional flat-plate thermosiphon type collectors. The initial system developed had an aperture area of 1.77 m², a receiver diameter of 200 mm, a concentration ratio of 1.47 and total water storage volume of 65 litres. The main disadvantage of the ICS systems comes from their design, i.e., because the collector absorber is also the storage cylinder it is not possible to insulate it properly and therefore there are significant losses during the night. The main cause of these losses is the convection currents created during the night, circulating around the top glass cover. Another disadvantage of the system is its draw-off characteristics. Because the water cylinder/absorber is horizontal there is very little stratification of the water in the cylinder. It is suggested that a primary 110 mm diameter cylinder is introduced at the space between the main cylinder and the glass. The cold water is introduced directly to the primary cylinder, which feeds the main cylinder. With this modification the convection currents are drastically reduced due to the obstruction created by the primary vessel, thus reducing the night thermal losses. Also as the cold water is introduced first to the primary cylinder there is no direct mixing of the two streams thus greatly improving the system draw-off characteristics. This modification creates an 8% increase in the total cost of the system, which is reasonable, if the above benefits are considered     

攀钢HC冷连轧机轧制数学模型优化

针对攀钢HC冷连轧机带钢轧制存在较严重的厚度超差问题，对轧制数学模型参数进行了优化，并进行了实际应用，薄带（h≤0.6mm)超差率降低25.4%，中厚带钢（h≥0.6mm)超差率降低33.4%。