连铸二冷参数的优化和控制研究

近些年连铸过程模拟成为研究的重点,模拟的根本目的在于优化连铸过程.为在保证连铸坯质量的前提下进一步提高连铸生产率,基于数学上的子问题接近优化技术建立了连铸过程二冷参数优化系统,可对不同钢种、不同拉速、不同冶金限制准则下的二冷各段配水进行最优化.运用优化后的这些过程参数,将使铸机以最大生产率、最小消耗运行,同时又保证了生产无缺陷铸坯.整个优化系统包括两个模块,一个是热过程模拟模块,另一个是设计优化模块,系统靠在两个模块之间反复自动循环调用而使参数得到优化.     

我国高等教育层次结构的优化研究

自改革开放以来,我国高等教育结构不断地发生着变化,高教层次结构也经历了多次革新,在明确界定高等教育层次结构涵义的基础上,回顾我国高教层次结构的优化历程,进而分析了我国高教层次结构不断进行优化的动力,并就现阶段的优化策略给出几点建议.     

一种可持续发展水资源优化配置模型的设计

深入分析了我国水资源优化配置理论及相关模型,阐述了可持续发展与水资源优化配置的关系,提出了水资源优化配置研究的发展方向.     

基于现场工况下的炼钢物料平衡和热平衡理论模型研究及应用

钢铁行业市场竞争激烈,对钢铁企业内部成本管理提出更高要求.炼钢厂作为钢铁企业的主要生产单元,其成本管理显得尤为重要.炼钢厂需根据市场行情及时优化、调整原辅料的入炉结构比例,跟踪动态模型与成本的关系并实施精细化成本管理.宁钢炼钢厂通过炼钢物料平衡和热平衡理论模型研究,结合现场实际工况优化模型,大幅度提高了模型精度.目前该模型成为技术管理和成本管理不可或缺的工具.     

基于现场工况下的炼钢物料平衡和热平衡理论模型研究及应用

钢铁行业市场竞争激烈,对钢铁企业内部成本管理提出更高要求.炼钢厂作为钢铁企业的主要生产单元,其成本管理显得尤为重要.炼钢厂需根据市场行情及时优化、调整原辅料的入炉结构比例,跟踪动态模型与成本的关系并实施精细化成本管理.宁钢炼钢厂通过炼钢物料平衡和热平衡理论模型研究,结合现场实际工况优化模型,大幅度提高了模型精度.目前该模型成为技术管理和成本管理不可或缺的工具.     

企业技术改造方案优化的探讨

本文结合公司厂房搬迁进行的技术改造实践,分析了技术改造方案优化的必要性,提出了技术改造方案优化的总要求和方针、方法.     

露天开采境界方案比较分析

本文介绍了铜山铜矿露天开采设计过程中对露天开采境界的不同优化方案,通过软件分析进一步优化了露天开采境界,并通过对不同规模、底标高进行了系统的比较和优化.     

铁矿石烧结工艺参数优化模型的设计与应用

在分析配矿方案、工艺参数、产、质量指标三者相互关系的基础上,提出了两种优化烧结工艺参数的数学逻辑模型,即网络输出参数优化模型和网络输入参数优化模型.通过神经网络建模,比较建模结果,网络输入参数优化模型的效果更好.在神经网络模型的基础上结合遗传算法求解网络输入参数优化模型,计算出最佳的工艺参数.模型通过应用,不仅降低了烧结能耗,而且提高了烧结矿的产、质量,验证了模型的有效性和实用性.     

棒材孔型系统优化软件的开发与应用

结合生产实际,研究了动态规划法在棒、线材孔型设计中的优化方法,为高速线、棒材生产提供了一套以低能耗为目标的计算机优化软件.实践证明,最高的优化效果可降低能耗3.0%以上.     

唐钢1500 m^3高炉技术指标优化

对1 500 m^3高炉大修前后的主要技术指标作了对比.通过原燃料优化、送风制度调整、装料制度调整等措施,实现了高炉生产的“高效、优质、低耗、长寿、环保”目标,提出了高炉技术指标进一步优化的调剂思路.     

FeAl合金研究进展与发展方向

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。     

高冰镍浸出机理及工艺研究

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     

Theory Study of AlCl Disproportionation Reaction Mechanism on Al (110) Surface

The surface disproportionation reaction mechanism of aluminum subchloride on aluminum (110) surfaces has been investigated using the plane-wave density functional theory (DFT). Three possible reaction mechanisms of AlCl disproportionation reaction on aluminum (110) surfaces have been taken into account; the reactants and products structures have been optimized, transition states have been confirmed, and activation energy has been calculated. The adsorption energy of reactants and the desorption energy of products also have been calculated. All of these calculations have been employed to confirm the reaction mechanism and the rate-determining step of AlCl disproportionation reaction on aluminum (110) surfaces.     

Investigation of the process of chlorination of tantalate-columbate concentrates

Tantalate-columbate concentrate has been studied; namely, its chemical, phase, and granulometric compositions and radioactivity have been investigated. The thermodynamics of reactions of chlorination of the components of the concentrate have been calculated in the temperature range of 400–1273 K. A technique of laboratory chlorination has been developed and experiments have been performed at T = 750 and 800°C. The products obtained have been analyzed. The total degree of chlorination of the concentrate, as well as of tantalum and niobium, has been determined at various temperatures.     

Occurrence and type of traumatic experiences among young Bosnian refugees in Denmark

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.     

连铸小方坯热应力模型的研究

建立了连铸小方坯二维传热数学模型及热弹塑应力频力模型，并用工厂 实际数据进行了验证，同时应用该模型分析了影响连铸小方坯热裂纹的因素，提高预防热裂纹产生的措施。     

竖炉球团配加巴西精粉的试验研究

为提高球团矿品位，改善冶金性能，进行了竖炉球团配加巴西精粉的试验研究。通过成球及焙烧试验，提出了适宜的巴西精粉配比和合理的焙烧制度，并对成品球团矿冶金性能进行了检测，同时对试验结果进行了分析和阐释。     

Uptake of benomyl by the cultivated mushroom, Agaricus bisporus

Of 96 cancers which have been detected as a result of the first annual screening of 10,470 volunteers, 46 have been clinically occult. Forty-one of these have been Stage 1 or less carcinoma, and 26 of these 41 have been minimal cancer. For the radiographic parameters used, the benefit of detecting these cancers vs. the risk of induced cancer is estimated as 103:1 and 65:1, respectively.     

钢板冷弯性能不合原因分析及对策

通过统计、分析和试验研究，找出了导致钢板冷弯性能不合的因素，提出了改进措施，并对其实施效果进行了验证。     

“十二五”中国废钢铁行业发展现状分析与“十三五”展望

通过分析“十二五”期间中国废钢铁资源供应与消费情况,尤其是近5年来国内的社会废钢、自产废钢和进口废钢的供应情况和炼钢废钢综合单耗的变化情况以及废钢铁行业装备技术进步和行业管理进步情况等,概括总结了中国废钢铁行业的发展现状和当前存在的主要问题,提出了“十三五”中国废钢铁行业发展的重点方向和发展机遇。