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针对大高炉——大转炉——棒材短流程刚性衔接的特殊工艺流程,就大转炉的生产安排、棒材的生产安排、棒材钢筋与圆钢生产方式、坯料判定标准、工人操作以及运送坯料设备是否正常运转等影响热送热装的实现每一环节进行了分析研究,制定了短流程生产作业程序,自主开发了质量信息传递程序,建立了质量信息传递网络,实现了连铸坯质量信息自动传递,实现了棒材生产辊道热送热装,效果较好。 相似文献
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采用热重-差热分析法检测了低水泥浇注料和特种高强浇注料的失重率,成功地提供了烘炉曲线,在马钢公司收到了较好的效果。 相似文献
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超高强Al-Zn-Mg-Cu-Zr合金的热变形行为 总被引:8,自引:2,他引:8
采用圆柱试样在Gleeble-1500热模拟机上进行恒温和恒速压缩变形实验,变形温度范围为350~450℃,应变速率范围为0.001~0.1s^-1。研究了。7055铝合金在高温塑性变形过程中流变应力的变化规律,确定了合金的变形激活能Q和应力指数n。结果表明,流变应力随变形温度的升高而降低,随应变速率的提高而增大。可用应力-应变速率方程来描述7055铝合金高温压缩变形时的热变形行为。这种合金在350~450℃温度范围内的热变形组织为发生了动态回复并伴随有少量再结晶的组织。 相似文献
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用热重-差热分析法分析了特种浇注料Al2O3、SiO2的干燥特性,找出了炉底爆裂的原因,提出了炉底改进意见,应用于马鞍山钢铁公司收到良好的效果。 相似文献
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Prior research has shown that young refugees may be especially traumatised. The study includes 123 young Bosnian refugees, living at two Bosnian boarding-schools in Denmark who were given a revised version of the Harvard Trauma Questionnaire (HTQ). The subjects themselves have on average experienced seven traumatic events, and have either witnessed or had a family member experience an additional six events. Three-quarters have been shot at, have lost their homes and private possession and have been exposed to violence in the form of harassment or humiliation. Two-thirds have lost friends. Three-fifths have lived with uncertainty as to whether friends and family were alive or dead. More than half have seen dead and wounded people, have had their lives threatened and have thought that they would die. More than a third have lost close family members, have been wounded and have had their homes destroyed. Just under a third have been exposed to physical violence or have witnessed somebody being killed. A quarter have starved and been ill without being able to receive treatment. About a fifth have experienced captivity, torture and forced labour. 6% have been raped or exposed to other forms of sexual abuse. It is concluded that the young Bosnians examined are a multitraumatised group. Use of the HTQ increased the number of traumatic events quite considerably compared to the case notes. 相似文献
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FeAl合金研究进展与发展方向 总被引:2,自引:0,他引:2
综述了FeAl合金的物理、力学性质,分析了造成合金延性低的主要原因——环境氢脆的产生原因和影响因素,概述了合金的加工方法和合金设计原则,最后指出了FeAl合金以后的研究重点和发展方向。 相似文献
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高冰镍浸出机理及工艺研究 总被引:3,自引:0,他引:3
研究了高冰镍和软锰矿在硫酸中的常压浸出过程 ,查明了影响浸出速率和浸出效率的因素 ,阐明了软锰矿、二氧化锰和高冰镍中镍硫化物的溶解机理 ,探讨了浸出过程中β -NiS的生成机理 ,提出了强化浸出的措施 ,进行了浸出正交试验 ,获得了浸出控制的最佳工艺条件 相似文献
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南钢与上海宝信软件股份有限公司实施开发了销售管理系统下的成品计量管理子系统,使公司成品计量信息的管理水平得到了有效提高,实现了数据共享和数据整合,实现了计量数据唯一、及时、准确的管理目标: 相似文献
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Christensen Helen; Hadzi-Pavlovic Dusan; Andrews Gavin; Mattick Richard 《Canadian Metallurgical Quarterly》1987,55(5):701
A meta-analysis was used to integrate the research literature on the treatment of obsessive-compulsive disorder. Antidepressants, such as clomipramine, and behavior therapy have produced appreciable changes in obsessive-compulsive and depressive symptoms. Patients with obsessions who did not suffer from compulsions have responded less to treatment. No follow-up data have been available for clomipramine, but the benefits of behavior therapy have been shown to be stable at follow-up. Ratings of improvement by assessors have been higher than ratings made by patients. The effects of tricyclic medication and exposure therapies have not significantly differed, but both have proven significantly superior to nonspecific treatment programs. There is a need for a large, randomized comparison of clomipramine and exposure that includes adequate follow-up of subjects after treatment has concluded. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
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Various linear scheduling techniques have been proposed over the years. The limitations on these techniques have been the inability to determine critical activities. Contractors and departments of transportation have identified this need. Recently two different methods have been proposed—the linear scheduling model and the repetitive scheduling method. This paper discusses basic linear scheduling techniques and then the calculation of critical activities of basic linear scheduling elements using the two methods. The results of the two techniques are compared. 相似文献
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Synthetic routes for oligonucleotides which have isoxazoline or isoxazole linkage have been developed, and di- and tri-nucleotides with thymine bases have been prepared. 相似文献
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This paper reviews recent literature on the strategic management process and considers several paradoxes viewed from a construction perspective. Many of the key issues surrounding the strategic management process have been discussed, and recommendations have been provided as to how construction organizations should respond. The main paradoxes considered were logical (rational) versus creative (generative) strategies; intended (deliberate) versus realized (emergent) strategies; revolutionary versus transformational strategies; strategic fit versus strategic stretch; and strategy versus organizational effectiveness. Each of these paradoxes was found to have considerable relevance to construction, and examples of how they have been applied to construction have been provided. For many construction organizations the key to success depends upon developing strategies that have an optimal balance within these paradoxes. This optimal balance will vary from one organization to another. 相似文献