Access数据库在采购管理中的应用

介绍了Access数据库的特点和优点,在采购管理中应用的意义.使用Access编写了<供应仓储管理系统>,论述了该系统的设计思想、程序结构及应用效果.该系统的应用,减轻了工作人员劳动强度、提高了工作效率、确保了物资及时供应、减少了资金的占压.     

45 t转炉修炉车液压传动系统设计

介绍了砌炉车的工作原理,围绕其工作原理和使用实践,对其液压系统进行了重新设计,选用了二通流量控制阀,实现了对修炉车三条油缸流量的均衡分配,确保了三个油缸的同步动作,有效地解决了原设计采用的比例分配阀流量分配不均的问题,提高了设备运行的平稳性和可靠性.     

变频器在4#空分油泵控制系统上的应用

叙述了天铁动力厂4#空分系统辅助油泵应用EV2000变频器控制系统的过程,对运行中出现的溢油、油压波动不稳等故障现象原因进行了分析,提出了改进方案.改进后消除了故障现象,实现了闭环控制油泵的转速和启停,减小了对电机和电网的冲击和振动,提高了设备的可靠性,延长了电机使用寿命,保障了生产的顺利进行.     

供水公司设备管理的探索与实践

本文主要针对供水公司设备管理的现状进行了深入的探索与实践，列举出了供水公司设备管理过程中存在的一些不足，并针对这些不足，展开了详细的分析，提出了设备优化管理的方法及措施。经过实践，使设备的工况得到了有效的改善，为设备管理水平及设备管理关键指标实绩的提升提供了强大的支撑，实现了节能减耗，取得了令人瞩目的成绩,为供水系统的安全、高效运行做出了巨大的贡献。     

压铸镁合金及其应用

论述了压铸镁合金的发展现状,介绍了部分压铸镁合金的化学成分及使用特性,分析了其工艺特点.描述了压铸镁合金在汽车工业和电子信息产业中的应用情况,并对今后的发展提出了看法.     

热轧卷板1780热卷箱控制系统优化

简述了热轧卷板1780热卷箱设备的优点及经常出现的问题。详细介绍了热卷箱设备的布置、成卷和开卷过程。分析了热卷箱控制系统的构成和控制思路。对突发故障的解决方案进行了细致地研究和优化、提高了控制精度,完善了系统的功能,满足了生产需要。     

用友资产管理系统在设备管理上的应用

用友资产管理系统根据天铁集团的设备管理要求配置了相关的功能模块,实现了设备管理的精细化、科学化、信息化,提高了设备的管理水平,降低了设备维修费用,同时实现了与财务一体化的无缝对接,为相关的钢铁企业设备管理信息化工作提供了参考。     

废水处理站自动控制系统的应用

介绍了邯钢冷轧废水站的配套项目废水处理站的自动控制系统,主要从自控设备组成、网络控制系统等方面论述了控制功能的实现,该系统的应用为ERP的数据采集提供了很好的保证,提高了电气控制的集成度和可靠性,简化了控制环节,提高了生产效率.     

抓斗吊车常见故障与解决措施

分析了20 t桥式抓斗起重吊车常见故障及原因,采取了相应的解决措施,从根本上杜绝了吊车的常见故障、节约了备件、降低了生产成本、减轻了维修人员劳动强度及提高了企业的经济效益.     

TRT顶压控制系统及其安全性的研究与优化

介绍了天钢1~#TRT顶压控制系统,对现有的顶压控制系统进行了分析,在原有差压调节模式的基础上增加了顶压调节模式,将实际操作改为差压调节与顶压调节两种互选模式,提高了系统的发电效率;对旁通阀组的控制进行了优化,优化后极大地提高了系统的安全性,保证了炉顶压力的稳定,延长了设备的使用寿命,产生了较高的经济效益。     

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。     

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。     

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.     

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.     

转炉渣选矿技术研究

本文简述了贵溪台炼厂一期转炉渣选矿生产现状，分析了生产中存在的问题，研究了转炉渣性质的变化，探讨了尾矿含铜高的原因，在现工艺流程基础地浮选药剂试验，提出了工艺流程及设备的履行等方面的建议。     

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。     

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。     

管道波纹补偿器的受力分析

介绍了几种波纹膨胀器的工作原理及使用原则,并对波纹膨胀器的破坏原因进行了分析,提出了详细的设计安装注意事项。     

Comparison of Metal Dusting Behavior of Several Alloys

Metal dusting hehaviors of several alloys with different chromium contents and other elements were investigated in a given gaseous environment. The samples of the alloys were exposed at 650℃ for 650 h, and were periodically removed to examine coke protrusions and pits formed on the sample surfaces by SEM and determine metal wastage. The results were interpreted in terms of the compositional variations of the employed alloys.