焊接烟尘污染现状及治理技术

文章通过对白云铁矿焊接烟尘污染现状的评价,及对各种焊接烟尘通风净化技术措施的论证,提出了切实可行的移动式焊接烟尘净化技术.     

合理配矿优化铁矿石质量

文章以白云鄂博铁矿矿石生产管理为研究对象,在详细论述分析白云铁矿矿石生产工艺系统现状的基础上,为了优化铁矿石质量,白云铁矿通过完善矿石转载建设以及合理制定配矿管理措施,较好地提高了矿石的均匀性、稳定性,充分利用矿产资源,从而保证了白云鄂博铁矿输出矿石综合合格率。     

提高矿用液压支架结构件可靠性的关键技术

由于我国经济近几年的飞速发展,也就促进了对技术发展的需求,想要使液压支架结构件的综合性能增强,同时满足设计与使用方面的需求,并且与国际的先进水平相适应,而该构建是以焊接工艺为主,在此层面上对一个产品的焊接质量的要求也随之增高,因此提高液压支架结构件可靠性的关键技术,在很大的程度上就是提高焊接的质量。所以,怎样去提高焊接质量是液压支架的核心问题。     

机器人焊接技术在液压支架结构件制造中的应用

文章从液压支架结构件焊接技术要求、焊接机器人应用于液压支架结构件焊接中的发展现状、制约焊接机器人发展的技术难题以及解决方案等方面概述了机器人焊接技术在液压支架机构件制造中的应用,旨在为液压支架构件的批量化生产提供借鉴。     

包钢NM400耐磨钢板的焊接性及其应用

包钢开发试制了耐磨板NM400,针对其焊接工艺性能及焊接接头力学性能进行了研究。结果表明采用抗拉强度550MPa的低合金钢焊条焊接,焊缝及热影响区内均未出现裂纹缺陷,且焊接性能良好,已在白云铁矿北方重工\张煤机\日本小松等公司成功应用。     

减少大型结构件焊接变形的工艺对策

针对工程机械中大型结构件的焊接变形问题进行了理论上的探讨．并在长期积累的工艺实践基础上。提出了减少工程机械大型结构件焊接变形的工艺对策。     

铝合金航行器运载体法兰与过线管焊接渗漏原因分析及改进

针对水下航行器运载体5A06焊接结构件密封焊缝处在外水压下频繁渗漏的现象,对铝合金材料焊接性、不等厚焊接结构及焊缝组织等方面进行分析,找出焊缝渗漏故障原因。通过优化焊接方法和焊接结构,并应用真空电子束焊接技术,实现了铝合金不等厚结构焊缝焊接,焊接接头性能良好。经试验验证,焊缝质量稳定、可靠,满足产品的密封性要求。     

白云铁矿矿石生产过程中的质量管理与控制

文章简要论述了白云鄂博铁矿矿石生产过程中各个环节的具体工作方法,总结了一些工作经验,并对各时期的质量计划工作,分穿、分爆工作做了详细的阐述,提出了白云鄂博铁矿矿石质量管理应采取的措施。     

白云鄂博铁矿粉的特性及其合理使用技术的研究

白云鄂博铁矿粉是包钢炼铁的主要含铁原料,其主要来自2类矿体,而不同矿体又因选矿方法的不同,存在一系列中间产物.以这些白云鄂博系列铁矿粉为考察对象,研究其化学成分、粒度组成、矿物类型及高温造块特性,并探讨合理使用白云鄂博系列铁矿粉的相关技术原则,为包钢优化矿山产品结构以及改善烧结矿、球团矿产品质量提供技术支持.     

厂房大型钢结构厚板构件的焊接技术

厂房钢结构厚板的焊接过程中,制定合理的厚板对接及T型缝的焊接工艺,运用先进的焊接技术,以保证结构件的厚板焊接质量。     

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.