天铁计算机中心办公自动化系统设计

为实现办公自动化,提高工作效率,设计了计算机中心办公自动化系统。介绍了计控电讯厂计算机中心办公自动化系统的设计过程。该系统实现了业务流程与日常工作的计算机管理,以及各业务数据的共享,提高了工作效率,达到了管理规范化和自动化的目的。     

回转窑托轮铸造缺陷的焊接修复

阐述了回转窑托轮的铸造缺陷的焊接修复过程,分析了ZG42CrMo的化学性能、机械性能和焊接性。通过确定合理的坡口形式、焊接材料、焊接参数,制定了焊接工艺。成功地修复了托轮,确保了产品的质量,取得了良好效果。     

智能制造在梅钢炼钢厂的应用实践

上海梅山钢铁股份有限公司炼钢厂围绕智能制造技术,在不同的生产工序开展了研究,从铁水预处理、转炉冶炼、炉外精炼、连铸4个工序,结合生产操作开展了模型化、智能化、自动化的智能制造技术,并取得了较好的应用实践效果。在铁水预处理工序开展了一键脱硫模型的开发,实现了脱硫操作一键化,对铁水扒渣的判定进行了智能化的研究,实现了对扒渣过程的智能判定,替代了人工判定扒渣等级。在转炉区域开展了转炉冶炼模型的研究,实现了一键炼钢冶炼控制,使得转炉终点控制更加稳定,补吹率在1%以下。在精炼工序开展合金模型的研究和应用,对降低合金总成本、提高钢水成分控制精度也发挥了重要的作用。在连铸工序开展自动浇钢综合研究,实现了无人浇钢控制技术,大大提高了劳动效率。     

新型烧结增效剂的试用研究

介绍了该烧结增效剂的试用背景,简要分析了其基本机理。阐述了该增效剂在马钢的试用情况,并进行了效益评价,同时给出了改进意见。     

NEUI集约型电解铝烟气净化除尘器简介

本文首先介绍了电解铝干法烟气净化的发展历程,并分析了现有电解烟气净化系统存在的问题。为了解决上述问题,NEUI研发的集约型电解烟气净化系统,该除尘系统采用二段式净化技术作为核心工艺,避免了一段式净化技术的弊端,减少了载氟氧化铝在除尘器内部的无功死循环,降低了除尘器的粉尘负荷,延长了滤袋的寿命,提高了除尘器的净化效率。通过在原除尘器主排烟道位置处设置新鲜氧化铝缓存仓,增加了电解铝生产的存贮量,提高了电解铝生产的物料安全性。通过在除尘器单元顶部设置主引风机,减少了除尘系统的占地,提高了净化系统的集约性和集成性,提高了净化系统物流的流畅性。     

泵池分矿箱旋塞提升机构的改造及应用

原有泵池分矿箱旋塞提升机构操作困难,使用寿命短,研究设计并制作了新形式的旋塞提升机构。经过现场的安装试用,彻底解决了操作困难的现象,排除了故障缺陷,消除了操作时存在的安全隐患,保障了岗位操作人员的人身安全,减少了检修维护的工作量,降低了技术。     

冶炼炉渣选矿设备研究与实践

有色金属行业冶炼炉渣的处理一直是一个技术难题,弃渣不仅污染了环境,而且浪费了大量资源。从20世纪60年代开始,国内外在炉渣选矿设备的研制方面进行了大量的研究,并取得了一定的成果。北京矿冶研究总院在大量理论研究的基础上,和江西铜业集团公司一起针对贵溪冶炼厂冶炼炉渣的浮选特点,解决了一系列技术难题,研制成功了冶炼炉渣选矿设备,并系列化。40m3炉渣浮选机于2005年11月在贵溪冶炼厂渣选厂得到成功应用,并取得了良好的经济效益,为选矿技术的发展增添了新的技术装备。文中介绍了冶炼炉渣的设计原则,设备主要结构的设计及工业应用情况。     

上口子高跷秧歌队,让专家评委都敬佩

今年的9月,辽宁省第八届艺术节正式在省城沈阳拉开了帷幕。为了参加这届艺术节,我们盘锦市歌舞团,真是动了脑筋、花了心血、动员了全部力量,最后拿出一台＂原生态＂剧目——歌舞诗《大苇荡》。这台节目在艺术节上出尽了风头,取得了意想不到的效果和成果。不光省里满意,市里满意,连笔者自己也非常满意。     

室式天然气加热炉的改进

对天然气加热炉进行了系统分析和改进。重点介绍了炉体结构及燃烧控制系统的改进。通过上述改进,提高了天然气加热炉的炉温均匀性,提高了产品质量和产量,取得了节能降耗的良好效果。     

中国再制造产业及再制造技术新进展

再制造是实现节能减排的重要措施,是促进循环经济发展的有效途径。本文介绍了中国再制造的特色,阐述了近年来中国再制造产业的发展。在国家领导高度重视和相关政策大力支持下,近几年来我国的再制造产业获得了快速发展,已逐渐形成了具有中国特色的再制造模式,再制造成形技术的快速发展,初步形成了再制造质量保证体系。同时,提出了中国再制造产业面临的挑战,展望了中国再制造发展前景。     

热处理对纳米氧化锆粉末性能的影响

采用共沉淀法制备纳米ZrO2粉末,对其进行不同温度下的热处理,并对经过热处理的粉末进行物理性能及形貌的测试分析。对经过热处理的粉末进行等离子球化处理,并对其形貌进行观测。采用等离子喷涂方法制备ZrO2涂层,对涂层形貌进行观测。结果表明在适当温度对ZrO2进行热处理可提高粉末松装密度、流动速率及表面光洁度,提高粉末和涂层的综合性能。     

Behavior of Ellipsoids of Two Sizes

The influence of particle shape on granular material response is examined by using the discrete element method. Triaxial drained and undrained tests were performed on specimens of ellipsoids of two sizes. The triaxial test boundary conditions were simulated with a recently developed boundary mechanism. Different loading paths including axial compression, axial extension, lateral compression, and true extension were employed. The specimens were composed of 1,170 ellipsoids having two types of particles. The specimen is made up of 50% by weight of Type I particles that have an aspect ratio of 1.2. The aspect ratio of the Type II particles varies between 1.5 and 2. The specimens were consolidated isotropically before shearing. Comparing with the behavior of specimens of mono-size particles, a higher friction angle and a more complex particle shape effect were observed. The friction angles from the drained tests (axial extension, true extension, and lateral compression tests) were similar and the values are higher than that of the axial compression test. All simulated results are in good agreement with laboratory observation of sands.     

电站锅炉燃烧器烧损的原因及对策

锅炉燃烧器投运后，多次发生烧损问题，进行试验及检查，分析燃烧器烧损的原因，提出解决方案并实施，取得了预期的效果。     

明日叶查尔酮对小鼠肝癌细胞凋亡相关蛋白表达的影响

Objective: The aim of our study was to investigate the effect of Angelica keiskei chalcone (AC) on the expression of Caspase-3 and Bax in mice hepatocarcinoma cells. Methods: Fifty mice inoculated hepatocarcinoma 22 cells were divided into five groups, 10 mice per group. Mice were given 5, 20, 40 mg/kg AC daily by mouth in low, middle and high dose groups respectively. Saline were given to the tumor control group by mouth. Twenty mg/kg cytoxan (CTX) by injection every other day were given to the positive control group. Ten days later, all mice were sacrificed. The levels of the Caspase-3 and Bax protein expression were measured by immunohistochemistry method and the proliferation activity of hepatocarcinoma cells was determined by MTT assay. Results: The expression level of Caspase-3 and Bax protein in tumor control group were 5.00%and 4.68%, respectively, and those of the high-dose group were 38.52% and 35.76%. The differences between two groups were significant (P ＜ 0.05). The cell proliferation activity of tumor control group and high-dose group were 1.135 ± 0.032 and 0.716 ± 0.018. The difference was significant (P ＜ 0.05). Conclusion:AC can increase the expression of Caspase-3 and Bax protein, and inhibit the proliferative activity of mice hepatocarcinoma cells.     

关于RH处理能力及耐火材料寿命的分析

介绍了本钢1号RH的功能及其能力;从RH的时间构成、处理钢种结构及生产组织方式等方面,分析了影响RH能力的因素;提出了RH有效处理炉数和钢种有效处理系数的概念;阐述了在生产组织、质量管理和工艺优化等方面所采取的措施,提高了RH的处理能力和延长了吸嘴寿命。     

Duration of incubation of fungal cultures

To determine the optimum duration of incubation for recovery of fungi, the results of 2,173 consecutive clinical cultures were reviewed. Overall, 94% of fungal isolates were detected by day 7 and 98% were detected by day 14. Yeasts were usually (98%) detected within the first week of incubation. Recovery of molds required more time, but 81% were detected by day 7 and more than 96% were detected by day 14.     

Comparison of the effects of introversion-extraversion and anxiety of conditoning.

This study investigates the effects of Eysenck's introversion-extraversion theory and Spence-Taylor's concept of anxiety on the eyeblink conditioned response by varying these factors independently. 56 patients were subjected to conditions of high and low anxiety. Group I (anxious group) were about to undergo major surgery; Group II (nonanxious group) were patients who had successfully recovered. These patients were divided into high introverts and high extraverts, yielding 4 groups (anxious introverts anxious extraverts, nonanxious introverts, nonanxious extraverts). The anxious groups showed greater conditioning than the nonanxious groups and no significant differences were found between the high and low introvert groups, supporting the hypothesis that total drive is, in part, a function of internal anxiety. (19 ref.) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

实用新型疏堵机在本钢矿槽改造中的应用

论述了矿槽堵塞的原因、形式、部位及采用空气炮、仓壁振动器等方法清堵的不足。介绍了一种实用新型疏堵机的组成及工作原理,分析了其结构特点。简述了该疏堵机的优点及使用效果。     

铸坯内部缺陷对钢板分层形成的影响

探测和解剖分析了断面有中心裂纹缺陷的铸坯;用扫描电镜等分析了依照探伤图谱所选轧后钢板分层缺陷明显部位的金相组织、缺陷形态和微区成分;指出了其沿轧向分布的铁素体带及其内部的条状或片状硫化物是中厚板分层的主要成因;给出了铸坯内部轧制时焊合及修复的边界条件。     

新型热轧钢卷运输系统研究

介绍了项目的背景、概况及热卷运输的特点，分析了常用的热卷运输方式的特点，详细研究了托盘式运输方案的难点和关键点，提出了首钢京唐钢铁联合有限责任公司热卷运输系统的方案。