济钢350m^3高炉电动泥炮的改进

济钢一炼铁为了解决３５０ｍ＾３高炉电动泥炮推力不足的问题，将电动泥炮的打泥机构改造为液压打泥机构，满足了生产要求。     

高炉液压泥炮吊挂机构螺栓断裂原因分析及处理

针对高炉YP6000E型泥炮吊挂机构螺栓频繁发生的故障，对发生故障的原因进行了分析，并提出切实可行的处理对策，消除潜在的设备隐患，为高炉正常生产提供了保障。     

安钢2800高炉打泥机构改造实践

通过对安钢2800高炉打泥机构的改进,有效的防止泥炮堵口事故的发生,延长了泥炮打泥机构的使用周期,减少了维修工作量。     

120m3高炉电动泥炮后期特护及改造

莱钢炼铁厂针对 12 0 m3高炉后期电动泥炮的运行状况 ,制定了特护措施 ,对电动泥炮回转系统进行了改造 ,对打泥机构进行了更新 ,从而提高了泥炮的作业率 ,有效地保证了高炉生产的顺利进行 ,年增效益 2 2 7.2万元。     

KD240液压泥炮在750m^3高炉上的应用与改进

通过KD240型液压泥炮在750m3高炉的应用，对泥炮构件存在的问题进行了改进，使其更加合理，提高了泥炮的稳定性和使用寿命，确保了高炉稳定顺行。     

KD75型液压泥炮的故障分析与改进

液压泥炮是高炉堵铁口的专用设备,因为泥炮故障造成的高炉慢风、休风现象较多,成为制约高炉生产的瓶颈。文章在介绍安钢450 m3高炉使用的KD75型液压泥炮结构特点及工作原理的基础上,分析液压泥炮在使用过程中出现的打泥机构吊挂系统、液压炮回转机构、打泥机构角度调整系统等故障并提出了改进措施,给出了液压泥炮使用和管理的几点建议。     

直推式液压泥炮国产化研究与分析

某钢厂4747m3高炉使用的一种直推式液压泥炮,其回转机构采用了回转油缸一端固定在机架上,另一端直接驱动转臂转动的四杆机构形式,这一类型液压泥炮减少了杆机构的数量,结构简单,检修维护方便,目前主要依靠从国外进口。根据泥炮设计原则结合该型泥炮的数学模型,给出了杆机构的设计参数,提出了设计方案。该方案合理可行,对此类型泥炮的国产化设计制造具有指导意义。     

高炉炉前液压泥炮的设计与选型

介绍了高炉炉前布置型式、液压泥炮在炉前布置中的注意事项和基本工艺要求。从四个方面探讨了高炉炉前液压泥炮如何进行设计和选型:首先,确定泥炮的能力和机型;其次,在主机方面介绍了如何进行打泥机构和回转机构的设计和选型;第三,在液压电控方面介绍了液压泥炮的功能要求、设计和配置选择;第四,在自动化作业方面介绍了一些提高堵口效率和炉前无人操作技术。对于高炉炉前液压泥炮,本文为设计单位提出了详细的设计思路和方法,为钢铁公司和工程公司提供了设备选型的基本依据。     

高炉泥炮运动参数优化设计

分析了高炉用两动作泥炮的直线机构,用SUMT优化程序计算出了各设计变量,并提供了几组适合不同容积高炉使用的设计参数,可供设计此类泥炮直接引用。     

本钢5号高炉应用液压泥炮的实践

随着现代高炉不断向大容积、高顶压、高风温的强化冶炼方向发展,还有无水炮泥的应用以及炉前机械化作业的要求,性能优良的矮式液压泥炮已经在大型高炉上逐步取代了电动泥炮。本钢5号高炉自1988年起就开始应用液压泥炮,虽然解决了原电动泥炮的打泥推力不足、检修量大和不利于机械化换风口等问题,但是却存在着另一些难以克服     

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.