鞍钢主流程能源模型的研究与应用

本文对鞍钢主流程(包括炼铁、炼钢和轧钢)能源模型进行了探讨。文中分别对主流程能源模型的研制;对炼铁系统用能优化模型、炼钢系统工艺选择模型和轧钢产品结构优化模型三个数学模型组的建立;以及对主流程能源数学模型的应用与分析等,作了较详细的介绍。     

铁合金系统电力优化决策模型的研究

文中介绍了铁合金系统电力优化决策数学模型建立的理论根据和建立方法。应用实例表明,该模型能详细探讨系统内铁合金产品结构改变时对系统电耗及经济效益的影响,可以求出多种优化方案并从中选出综合最优的决策方案。     

宝钢厚板加速冷却系统的在线模型机理分析

TMCP钢板的终冷温度精度直接影响了产品的质量和性能,而作为控制核心的在线模型则起着决定性的作用.本文系统地介绍了宝钢厚板厂加速冷却系统所采用的在线模型的原理,并详细地分析了在线速度的唯一性确定方法,为以后模型及参数的优化打下了良好的基础.     

双变量优化模型在宝钢电厂的应用

宝钢电厂共有5台发电机组。其中,0、4号机组为全烧高炉煤气机组,1、2、3号机组为高炉煤气/燃煤混烧机组。高炉煤气与发电负荷在全厂的合理分配,对于降低全厂的供电煤耗、保持机组的经济运行等具有重要作用。详细阐述了混烧机组双变量煤耗特性曲面结合逐次梯度寻优法建立负荷与燃料优化分配模型的方法,并用优化分配模型对电厂实际数据进行了优化分配,得到了显著效果。     

炼钢-连铸新工艺条件下的中间包优化方法

 在炼钢-连铸中,改进后的新工艺条件使得中间包寿命的评价方法由固定炉数变成了固定时间,针对这种变化,建立了相应的中间包优化模型。模型中考虑了炉次计划中的钢种、浇铸宽度、拉速等因素对浇铸时间的影响。采用启发式和DNA进化相结合的方法求解模型,先设计了3个启发式算法,然后在此基础上设计了基于DNA进化的优化方法,并给出了详细步骤。通过对企业实际生产数据进行仿真计算,其结果表明优化后的中间包利用率明显提高,从而验证了该方法的有效性。     

软测量技术在钕铁硼氢粉碎工艺过程中的应用

氢粉碎工艺是制备高性能钕铁硼产品的必备手段,针对钕铁硼氢粉碎的原理和工艺过程,提出了利用软测量技术在线监测钕铁硼氢粉碎过程,从而优化氢粉碎工艺过程、缩短生产周期的思路与方法.详细阐述了软测量模型的建立方法,并通过MATLAB实现了模型的仿真验证.     

热处理炉温度模型算法与实现

为了对热处理炉的加热温度进行优化和控制，提高自动化程度及加热质量，有效降低能源消耗，运用热处理炉温度模型的设计，根据对流和辐射的原理，着重介绍了热处理炉控制系统温度模型的算法及应用原理，详细说明了算法设计思想和计算等。同时与PLC的数据接口以及报文传送内容进行了设计和解释，描述了模型算法流程及温度模型的实现。     

钢铁企业余材库存与合同匹配模型的分类和研究进展

在梳理近年来国内外学者关于钢铁企业库存匹配和合同计划两个问题的研究基础上,本文提出从三个维度对余材库存与合同匹配模型进行分类,详细说明了每种维度下分类依据;然后按各维度组合对现有模型进行划分,并从约束条件、决策目标、模型类型对现有模型进行比较;接着对余材库存与合同匹配中的联合优化、动态匹配分别进行分析;最后,展望了余材库存与合同匹配模型在"互联网+"环境下的研究方向与热点。     

连铸机钢包回转平台钢结构的计算机仿真与优化

基于美国EDS的ideasMS9m2软件 ,针对连铸机大包转台钢结构设计复杂 ,部件多的特点 ,在计算机内进行了虚拟样机设计 ,即三维造型、系统装配和干涉检查 ,并基于虚拟样机的基础上创建了有限元仿真分析的力学模型 ,同时进行了详细的优化计算分析 ,为方案设计提供了可靠的理论依据。     

专家系统在生产制造系统（MES）中的应用

介绍了生产制造系统(MES)。对MES工程最核心的生产计划模块选用了专家系统来实现其功能。引进了STEELPIA平台的专家系统模型。通过搜索知识库的专家知识最终出钢,轧钢的作业指示。对补充到专家系统的知识库中的部分浇铸的调度策略的优化过程作了详细地描述。     

The effect of amount of possession of the trait of hostility on accuracy of perception of hostility in others.

Some theories of personality hold that an individual's perception of others is influenced by his own personality characteristics; more specifically, that a trait of low social value will be projected more into others, and that insight into the possession of these characteristics reduces this distortion. These 2 hypotheses were tested by having a group of college students rate each other (including themselves) on degree of friendliness or hostility. Agreement with group rating about self yielded the insight score. In general, the hypotheses were supported; the "friendly" Ss were most accurate in their perception of others, and insight was positively associated with accurate perception. From Psyc Abstracts 36:04:4HL16M. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Comparison of rates of infection of two methods of emergency ventricular drainage

The rates of infection of two methods of external ventricular drainage in use at Atkinson Morley's Hospital--namely, (a) percutaneous drainage with Rickham reservoirs and (b) tunnelled ventriculostomies--were compared in this retrospective review. Percutaneous drainage of CSF with Rickham reservoirs was associated with a 27% rate of infection as identified by positive microbiological cultures; tunnelled ventriculostomy catheters had a 10% infection rate. The difference in the infection rate between the two methods was statistically significant (P < 0.015). Other variables examined, including the age and sex of the patients and the reasons for ventricular drainage, were not associated with an increased rate of infection. Most infections from either method were caused by a coagulase negative staphylococcus. The average duration of ventricular drainage before identification of positive cultures was 5.7 days for Rickham reservoirs and 6.0 days for ventriculostomies.     

浅析《野草》的版画特征

鲁迅先生一生热爱美术作品,对版画中木刻兴趣尤甚.<野草>作为其"写心之作",亦呈现出一些与木刻版画一致的审美特征:一是具有木刻版画的色彩特征,多对比、多冷色,有阴郁的美感;二是具有木刻版画的力度特征,环境描写、人物刻画处处刀锋毕现,遒劲有力,有一种"力之美".     

四辊破碎机车刀架的改造

针对四辊破碎机车刀架车削中存在的几个问题,详细介绍了电动车刀架的结构和工作原理,建立主要设计参数的数学表达式,并进行适当的分析。改造后,这种电动车刀架运行平稳、可靠、方便、省力,取得了预期的效果。     

转炉炉壳热应力分析

根据实际转炉建立实体模型。以有限元为手段,考虑了炉衬和炉壳材料的物性参数随温度变化的特点和炉衬与炉壳之间膨胀间隙,计算了转炉炉壳在温度载荷和炉衬膨胀压力同时作用下的热应力。所得结果可为转炉炉壳设计提供依据。     

Comparison of the results of surgical and conservative treatment of fractures of the diaphysis of the tibia

In this paper is treated the fundamental problematic of the fracture of the diaphysis of the tibia and the therapeutic results after the conservative and operative treatment are confronted. Among 518 patients with 433 open fractures and 35 with closed fractures of the diaphysis of the tibia, successful treatment of more 2/3 was obtained in the period from 1968 to 1972. Following our casuistics and literature, whose results are similar, we find out that the average total treatment of the osteosynthesis of the fracture of the diaphysis was shortened for 2,5 months depending upon the type and the localisation of the fracture. Apolied methods of the operative and conservative and conservative treatment in relation to the velocity of the medical cure as well as to the extreme anatomical-functional results are analised. We noticed that osteosynthesis, made by the intermedullary nail and the extension of the canals or by a small AO table, by the achieved stability makes conditions of immediate motions and an early rehabilitation. Because of that it gives the best functional results.     

焦炭热性能指标意义浅析

通过对焦炭在高炉内的历程及其变化规律的剖析,阐述焦炭热性能指标的意义,形象地把焦炭在高炉内的损耗分为三部分(M1,M2,M3)。指出M2对焦比及焦炭价格有一定的指导作用。     

Results of treatment of cancer of the cardia

Cancer of the cardia is traditionally discussed with cardiac cancer of the lower portion of the esophagus and upper gastric cancer invading the esophagus, and the specific characteristics of cancer of the cardia have never been clearly defined. We reviewed the outcome of 172 patients with adenocarcinoma of the cardia who had undergone radical surgery between 1949 and 1994 in the Division of Gastrointestinal Surgery of the Cancer Institute Hospital. The centers of the tumors were located within 2 cm above and below the boundary between the esophagus and the stomach, and their longitudinal diameter was less than 8 cm. We divided the patients into an early period (1949-1979; n = 79) and a late period (1980-1994; n = 93), and focused on the historical transition. There were no differences in patient gender or histology between the two periods. However, the late period was associated with fewer cases of esophageal invasion and shorter longitudinal diameter, as the age of the population advanced. The number of advanced cancers such as the localized and infiltrative type had decreased, and early cancer and early clinical stage had become more common, but despite the fact that the number of early cancers had increased, extended dissection, such as thoracic and paraaortic lymph node dissection, was performed more frequently. By clinical stage, the long-term outcome markedly improved in Stage I patient in the late period, and tended to improve in Stage II and III patients. This appears to have been attributable to the prevention of micrometastasis by extended dissection, although the number of early cancers is another major potential cause. There were no differences in the outcome of Stage IV patients between the two periods, and further advances in multimodality therapy must be awaited. The range of resection is basically proximal gastrectomy, and if there are adequate indications, the prognosis is favorable. In view of the status of lymphatic flow and lymph node metastasis, and long-term results, lateroaortic lymph node dissection is important. Since the number of early cancer patients has been increasing, if intraabdominal recurrence is prevented, intrathoracic lymph node dissection will contribute greatly to the outcome of such patients.     

参与式农业基地建设行动方案设计

为了编制实用性强的基地建设行动方案,首先,确定参与式发展的主体,搭建一个"决策框架";其次,针对行动目标,提出不同参与主体,如管理者、农民、消费者等团队与个人的目标及行动内容;最后,工作应向重塑伙伴式合作关系,挖掘农民自我发展潜力,完成三大角色的转换,打造农业基地文化等方向推进.