热连轧机油膜轴承润滑系统的改造

油膜轴承是现代轧机的关键设备,合理的润滑系统是油膜轴承稳定运行的基础。通过分析鞍钢2150mm热连轧机精轧机组油膜轴承润滑系统存在的问题,诸如加热方式、压力罐控制、流量报警等,针对每个问题提出改造方案,方案实施后,取得了较好的经济效果,油膜轴承润滑系统运行稳定。     

出坯机电气控制改造

对出坯机电气控制系统存在的问题进行了分析，提出了改造方案，并介绍了改造后的使用效果。     

企业自备电厂新组产模式下的运行分析与系统改造

某自备电厂母管式系统组产模式由五炉四机变为两炉两机运行，组产模式的改变对生产运行产生影响。通过系统运行分析与改造，消除新组产模式下的安全隐患，确保新系统的安全稳定运行。     

蒸发循环水水质与处理浅析

本文针对氧化铝生产循环冷却水系统存在的水质差、温度高、悬浮物含量高、管道设备结垢、堵塞的问题，论述了该系统的水质，结垢机理和堵塞的原因，阐述了循环水系统的改造方案；提出了今后改造和运行中应注意的事项。     

钢管穿孔机加热炉的天然气改造

介绍了加热炉天然气改造方案,该方案主要由燃烧系统和电拉系统两部分组成,对加热炉进行自动恒温控制,投产半年运行正常,达到了设计效果.     

20 kW电子束炉的控制系统设计与应用

在西北有色金属研究院20kW电子束炉改造中，重新设计了基于PLC和组态软件的控制系统，本文介绍了该系统的设计方法，并在分析真空度不稳定原因的基础上，阐述了电子束炉真空系统的控制方案及其算法。该系统已投入运行，效果良好。     

十八河尾矿库自动化监测系统的升级改造

针对铜矿峪矿十八河尾矿库自动化监控系统存在的问题进行了深入探讨,阐述了升级改造的整体思路、改造原则和具体施工方案,重点对防雷系统的设计施工及软件的维修升级作了详细说明。通过升级改造,保证了该系统安全稳定运行,同时也锻练了用户维修人员解决问题的能力,为今后系统的运行维护打下了基础。     

彩色铝板涂层机列增加清洗工作模式的实现

给出了一种基于涂层机列实现新增清洗功能的方法。介绍了新增加清洗模式与原有系统间的关系,详细阐述了对机械系统及电气控制系统的改造原理和实现方案。结果表明:该技术可行,具有良好的控制性能,对老设备的改造具有一定的借鉴作用。     

逆流保护系统在高炉鼓风机系统中的应用

概述了逆流保护系统在高炉鼓风机系统中的应用,详细地介绍了逆流的概念、逆流保护系统的控制流程以及逆流保护系统的作用。在实际运行中喉部差压开关故障会导致风机逆流停机,从而影响向高炉送风,影响高炉生产,为了提高该系统的稳定性,介绍了对该保护系统的一种改造方案,并详细说明了该改造方案程序修改及实现功能。     

600MW机组过热器减温水水源改造可行性分析

针对目前运行的机组过热器减温水系统原设计布置不合理的问题,以某电厂600 MW机组为例,对机组经济安全进行了可行性分析,最后提出了将过热器减温水取水点由给水泵出口改至高压加热器出口的改造方案.实践表明该改造方案可有效提高机组运行的经济性,可为今后类似机组的改造提供参考.     

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。     

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.     

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。     

Effect of antibiotics of chemotaxis of human leukocytes

The effect of 20 different antibiotics on chemotaxis by human neutrophils was studied. Human leukocytes incubated with chloramphenicol, rifampin, sodium fusidate, and tetracyclines in vitro showed markedly depressed migration. The mechanisms by which these antibiotics affect leukotaxis are discussed.