石油钻探用耐磨焊管的生产

石油钻探用耐磨焊管的生产这种石油钻探用耐磨钢管由覆层钢板焊接制成。该铜板外层的成分为，％：Ｃ０．２５～０．６，Ｓｉ＜０．６，Ｍｎ０．５～３．０，Ａｌ≤０．１０；内层成分为，％：Ｃ０．０１～０．１５，Ｓｉ≤０．６，Ｍｎ１．２～２．０，Ｔ１０．００４～０...     

稀土对白口铸铁组织和性能的影响

本文研究了稀土对白口铸铁组织与性能的影响，微合金化，热处理对白口铸铁性能的改善。研究所用的原铁水成份为Ｃ：２．４～３．０％，ＳｉＯ：３～１．０％，Ｍｎ：～０．５％，Ｐ、Ｓ：＜０．１％，稀土加入量试验范围为０～１．２％ＲＥＳｉＦｅ，结果表明适宜的稀土硅铁加入量为０．８～１．２％。     

LF（钢包炉）固体合成渣脱硫工业性试验研究

以３０ｔＥＢＴ超高功率电炉为初炼炉和４０ｔＬＦ（钢包炉）作为精炼炉，使用ＣａＯ－ＣａＦ２系固体合成渣对Ｑ２３５钢进行钢包炉内脱硫工业试验，在本试验条件下，当ＥＢＴ电炉初炼钢液（Ｓ）初＝０．０３５％～０．０８１％时，最佳精炼渣碱度Ｒｂ＝（％ＣａＯ）／（％ＳｉＯ２）为２．０～２．６或Ｒｆ＝（％ＣａＯ）＋（％ＭｇＯ）／（％ＳｉＯ２）＋（％Ａｌ２Ｏ３）为１．５～２．０，渣指数（ＣａＯ）／（ＳｉＯ２）：（Ａ     

稀土氧化物对欠基烧结材料性能的影响

本文研究了添加稀土氧化物对铁基烧结材料的影响。探索了稀土氧化物加入后在烧结材料中的作用机理。试验结果：采用一般粉末冶金生产工艺，当加入二氧化铈为０．５％，其性能最优，比未加入ＣｅＯ２的材料，其抗拉强度提高１．３￣７．７％，冲击性能提高１９．２￣５２．０％，延伸率提高４６．１￣５７．６％。分析表明稀土氧化物主要能使材料晶粒细化且均匀、提高材料结合强度，因而在烧结材料中添加稀土氧化物是使其性能提高的有     

低氧化镍矿选择性还原生产炉料级镍铁研究

采用含Ｎｉ０．９１％、ＴＦｅ４７．０７％、Ａｌ２Ｏ３６．１１％、ＭｎＯ０．４４％，Ｃｒ２．６４％的低镍矿作原料，进行选择还原，获得了Ｎｉ２．８５～５．６２％、Ｃｒ≤１．０５％、Ｃ０．０１３％～５．２８％、Ｐ０．０３４％～０．０９８％的炉料级镍铁。本产品可以满足冶炼含镍低合金钢和合金铸铁的需要。经选择还原后的炉渣含铁量为４７．２５～５０．８８％，碱度为０．７５～０．８８，可作为部分自熔性烧结矿加入高炉冶炼生铁。     

矿热炉碳热法生产硅基钙钡铝合金

使用６０００ｋＶＡ矿热炉，采用碳热法，在冶炼７５％硅铁的基础上，再加入石灰石，重晶石，含铝矿，以焦炭为还原剂，生产含Ｓｉ７２－７６％，Ｃａ１．４－２．０％，Ｂａ０．６－１．２％，Ａｌ２．５－３．５％的硅基钙钡铝合金，其生产结果为：冶炼电耗１０１０５ｋＷｈ／ｔ；硅，钙，钡，铝元素回收率分别为８１．７６％，４０．５５％，６７．９６％，５７．２２％，取得了很好的经济效益。     

用于微波器件的大面积YBCO超导薄膜

高质量大面积ＹＢＣＯ薄膜是用原位中空柱状阴极直流磁控溅射装置制备的，化学计量比的超导靶的内为１００ｍｍ，加热器有效面积５０×４０ｍｍ＾２。在３０×３０ｍｍ＾２的Ｚｒ（Ｙ）Ｏ２ＬａＡｌＯ３基片上沉积的ＹＢＣＯ薄膜的厚度均匀度为±６％，临界温度Ｔｃ＞８９Ｋ，Ｔｃ不均匀性在１％以上，△Ｔｃ在０．８～０．９之间，临界电流密度Ｊｃ为２．０～３．５×１０＾６Ａ／ｃｍ＾２，△Ｊｃ为１．０～１．５Ａ／ｃｍ＾２，微     

铬─钼─钒系热模具钢中加镍量的探讨

研究了镍对热作模具钢４Ｃｒ３Ｍｏ２ＮｉＶＮｂＢ力学性能的影响，结果表明在这种钢中加入少于１．０％的镍，能增强二次硬化效应，提高韧性，改善热疲劳抗力。当加镍量达到２．０％时，镍的强韧化作用将被削弱。对产生这种作用的原因进行了讨论，并确定了４Ｃｒ３Ｍｏ２ＮｉＶＮｂＢ钢中镍的适宜加入量为１．０％。     

能抗热裂的新型耐热铸钢

能抗热裂的新型耐热铸钢日本研制的这种铸钢所含的主要元素有，％：Ｃ＞０．２和≤０．３５，Ｃｒｌ８～２５，Ｎｉ２０～３０，Ｎｂ０．３～０．６，Ｚｒ＞０．７和≤１，９，Ｓｉ０．５～２，Ｍｎ≤２。锆与铌以弥散的ＺｒＣ和ＮｂＣ形式存在，并具有很好的热稳定性。进...     

ICP—AES法测定锌合金中的稀土杂质

研究了用ＩＣＰ－ＡＥＳ法测定锌合金中６种稀土元素（Ｌａ２Ｏ３，ＣｅＯ２，Ｐｒ６Ｏ１１，Ｎｄ２Ｏ３，Ｓｍ２Ｏ３，Ｙ２Ｏ３）的方法，采用正交设计实验对工作参数进行最佳化选择、基体匹配的方法消除基体影响，利用两点定标校正曲线法计算测量结果。在最佳实验条件下，本法测定杂质元素检出限０．１￣０．８μｇ／ｇ，相对标准偏差２．６％￣５．６％，回收率９１．６％￣１０６．３％。方法简便、快速，可以满足科研生产的需要     

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。     

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.     

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。     

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.