板带轧机HAGC系统基于小波变换的传感器故障诊断

 提出了一种基于小波分析的HAGC系统传感器故障诊断方法。通过建立系统的MA模型，建立残差信号，利用离散小波变换对残差信号进行多分辨率分析。通过残差信号的故障高低频特性，提取故障敏感特征，实现了传感器故障时间、故障原因、故障程度的诊断。仿真研究表明，该方法凸现故障特征，时域定位准确，不但适用于突变故障，对渐变故障同样有效。     

设备故障管理初探

该文对如何控制设备故障作了初步探讨，笔者根据多年在文印厂的工作实践对各类设备的故障进行了分类，分析了诱发设备故障的因素，提出了控制设备故障的对策，总结了故障管理的效果。     

Boomer系列台车断钎原因及对策

针对Boomer系列台车发生断钎的故障现象，分析故障原因，探讨了故障的处理程序和方法，提出了处理故障的对策。并介绍了Boomer系列台车不同凿岩机配置的推进压力设置标准。     

板坯连铸机结晶器振动系统故障分析与治理

介绍了天津钢铁有限公司4^#板坯连铸机结晶器振动系统，根据液压系统原理对故障现象进行逻辑分析，利用排除法查找故障，找出发生故障的部位，进行修复，保证了生产的顺利进行。     

处理风机振动问题时考虑输送介质因素的重要性

指出当风机出现振动故障时，尤其是在故障预兆期内判断故障原因时，应当结合风机输送介质的性质及特点。这对于风机故障的正确诊断和以后的选用及改进具有重要意义。     

电力变压器固体绝缘故障的诊断

通过研究在故障涉及固体绝缘时，其它特征气体组分与CO、CO2间的伴生增长情况，提出了一种动态分析变压器绝缘故障的方法。并着手建立故障气体的增长模式，为预测故障的发展提供了新的判据。     

运用时域波形与频谱值判断烧结风机故障

时域波形，直观且易于理解，对于故障成分突出且噪音较小的故障信号，时域波形持征明显，充分利用这些特征突出的时域波形及频谱值，结合设备本身的结构，就可以分析故障的根本原因。本文阐述运用简易仪器发现故障设备的故障特点，再运用数据采集器进行精密诊断，分析其时域波形，得出正确的判断。     

45t转炉三点支撑自调螺栓连接装置的检修

分析了炉体与托圈连接装置的结构以及可能出现的故障，针对这些故障提出了可行的处理方案，缩短了故障停机时间。     

TRT机组叶片冲蚀磨损故障诊断及处理措施

通过对武汉钢铁公司5^#高炉TRT机组叶片故障进行诊断，分析了故障的原因，指出积灰，气流脱流和堵塞中剧了叶片的冲蚀磨损，从而导致机组故障。提出了排除机组故障的方案，实施后效果良好。     

活性石灰车间成品系统PLC程序的优化

通过对成品系统PLC程序的优化，减少了不必要的停机，并使故障现象更为直观，操作和维修人员能够快速、准确地排除电气故障，降低故障时间，从而达到提高产、质量的目的。     

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.     

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。     

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。     

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。     

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。     

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.     

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。