W-15Cu电子封装材料导热性能的研究

研究了熔渗温度、退火温度及退火冷却速度对W-15Cu电子封装材料导热性能的影响,试验结果表明退火能改善W-15Cu电子封装材料的导热性能,经850℃退火随炉冷的导热性能稳定在190W/(m*K)左右;W-15Cu电子封装材料界面残余应力的大小是影响材料导热性能的重要因素之一,残余应力越大,材料导热性能越差;W-15Cu电子封装材料随熔渗温度升高,导热系数增加,熔渗温度在1 400℃时的导热性能最好.     

电子封装用CPC新型层状复合材料的研制

主要介绍了用轧制复合法制备CPC(Cu/Mo-30Cu/Cu)电子封装材料和用熔渗法制备其芯材Mo-30Cu的工艺。CPC电子封装材料是一种“三明治”结构的层状复合材料,芯材是Mo-30Cu,由70%(质量百分含量)的Mo和30%的Cu组成的“假合金”,双面履以纯铜。结果证明,该种复合金属材料主要有以下几个特点:(1)膨胀系数低且可调,可设计成与芯片、陶瓷基板的膨胀系数相近,从而避免热应力引起的封装失效;(2)导电、导热性能好(导热系数TC值可达265W/m.K);(3)材料强度与刚度足够的同时,保证其机械加工性能和可塑性较好。由于其优良的性能和较低的成本,CPC将是下一代的重要热沉材料,在半导体激光器、微波通讯、集成电路用散热底板、射频和汽车的电子系统等方面都有着广泛的应用前景,尤其是大功率电子器件的散热更是其优势所在。     

铜／钼／铜电子封装复合材料的制备方法

本发明属于电子封装材料领域，主要应用于微电子和半导体行业的金属封装，特别是涉及一种采用轧制工艺制备铜／钼／铜电子封装复合材料的方法。该方法包括表面处理、包覆、热轧、退火、冷轧、后续处理6个步骤。本发明与现有技术相比具有制备工艺简单、易控制、适于规模化生产的优点，其成品具有高导热、尺寸适应性和一致性好、成品率高、冲压性能良好，同时具有与半导体材料相匹配的热膨胀系数和导热率的优点。     

热轧工艺对铝电解电容器用低压阳极箔的影响

研究了热轧均匀化退火工艺及热轧终轧温度对低压电子铝箔临蚀性能的影响。     

电子封装用粉末冶金材料

本文阐述了电子封装材料的基本要求与状况，对传统封装材料Al2O3、BeO、SiC的制备工艺、性能指标进行了介绍，着重分析了新型电子封装材料A1N、W／Cu、Mo／Cu、SiC／Al的性能特点和粉末冶金制备工艺的最新研究进展。     

连续退火工艺对冷轧H345屈服强度影响的热模拟研究

采用Gleeble-3800热模拟实验机,结合透射电子显微镜和电子拉伸试验机,研究了不同连续退火工艺对H345冷轧低合金钢性能的影响。结果表明,温度为815℃、冷却速率为28℃／8的连续退火工艺,可以提高钢的屈服强度。     

00Cr12Ti铁素体不锈钢再结晶织构与成形性的研究

实验室研究了冷轧00Cr12Ti铁素体不锈钢在820℃不同保温时间下的退火工艺,运用电子背散射衍射（EBSD）技术研究了试验钢板再结晶晶粒的显微织构、尺寸和晶界角度分布及其成形性能的关系。试验结果表明：不同保温时间下退火钢板再结晶晶粒的显微织构、晶粒尺寸和晶界角度分布上存在着差异,这种差异反映出不同退火工艺对钢板成形性能的影响。此外,还利用EBSD对不同退火工艺的再结晶程度作了分析。     

连续退火工艺对Nb-Ti-IF钢性能及再结晶织构的影响

研究了热镀锌连续退火工艺对Nb-Ti-IF钢性能及再结晶织构的影响.利用Gleeble-3800热模拟试验机对带钢在80 m/min和120 m/min两种带速条件下的连续退火工艺进行了模拟,采用780、820、860、900 ℃4种模拟温度.用X射线衍射仪、透射电子显微镜、光学显微镜、电子拉伸试验机对样品的再结晶织构、组织、第二相粒子及力学性能进行了检测和分析.结果表明,退火工艺直接影响退火试样的力学性能、第二相粒子的形态、大小及分布和退火织构.经综合分析,给出了Nb-Ti-IF钢最佳连续退火制度.     

含钛超低碳搪瓷钢板的退火工艺

 研究了两种不同退火工艺——罩式退火和连续退火工艺对含钛超低碳搪瓷钢板成型性能和贮氢性能的影响。试验结果表明,材料经连续退火后其成型性能略优于罩式退火,而其贮氢性能是经罩式退火后的明显好于连续退火。因此综合考虑,采用罩式退火工艺可实现成型性能和贮氢性能的良好匹配。     

一种具有特殊层厚比例的铜／钼／铜电子封装复合材料的制备方法

本发明属于电子封装材料领域，主要应用于集成电路、激光器件等半导体领域中的金属封装行业，特别是涉及一种采用在钼板上电镀或喷涂铜层后的轧制工艺，制备具有特殊层厚比例的铜／钼／铜电子封装复合材料的方法。该方法包括表面处理、电镀或喷涂、退火、冷轧、后续处理5个步骤。本发明与现有技术相比具有生产工序简化，生产周期缩短，生产效率高，成本低的优点；     

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.