大方管铝型材挤压模结构的改进

文章介绍了传统大方管铝型材挤压模过早失效的原因,详细分析了传统大方管挤压模的结构特点,提出了一种新的模具结构,并阐述了这种新模具结构的组成要素,说明了有关主要结构参数的选择,描述了这种新结构的优点。通过对新旧模具结构的使用结果对比,表明了这种新的模具结构是有效的,具有明显优势,能大大提高模具寿命,是一种值得推广的模具结构。     

一种90系列门窗下方铝型材分割式伪分流模结构

提出了一种新的90系列门窗下方型材的伪分流模结构,这种结构称之为分割式分流模。阐述了这种结构的分割方法、模具结构和有关结构参数的选择,并对这一新的模具结构与传统的平模结构、整体式平模和遮盖式分流模结构的使用结果进行了分析和对比。结果表明,分割式分流模具有明显的优势,它改变了悬臂的结构,大大减小了悬臂的舌比,适用范围更广。同时,具有加工便利的特点,可以大大提高模具的强度。这是一种值得推广的模具结构,扩大了半空心铝型材模具结构的选用范围,具有很强的针对性。     

金属材料增材制造成型结构研究进展综述

概述了金属材料增材制造成型技术中常见的复杂结构,介绍了薄壁结构、多孔结构和悬垂结构的试验研究进展,综述了每种结构的成形难点和解决方案;最后总结了对复杂结构研究方面的不足,并指出了将来研究的方向。     

铝合金型材在电子工业产品中的应用

本文对电子工业产品中作为箱、柜、台、架的两种主要结构形式——板金结构和铝型材结构的优缺点进行了比较,阐述了我国采用铝型材结构的三个发展阶段;结合本厂产品指出了铝型材结构的优点。同时,介绍了在设计结构用铝型材断面时的注意要点。     

钢筋混凝土框架结构的延性抗震设计

分析了结构延性在抗震设计中的重要性及其作用,探讨了影响结构延性的主要因素以及结构延性的抗震设计。事实证明,结构抗震的本质就是延性,提高延性可以增加结构抗震潜力,增强结构抗倒塌能力。     

过饱和Cu-Cr合金时效过程中的亚稳结构

利用气雾法制备了Cu—1．56Cr合金粉末并对其于500℃进行了时效，用高分辨电镜观察了其不同时效阶段的结构，并于时效的前期阶段观察到了两种亚稳结构且均为调制结构。利用电子衍射测定了两种结构的晶格点阵，其中调制结构I为在基体的目格点阵上进行的调制，调制结构Ⅱ为DO。型超结构且与基体之间具有N-W位向关系，是后来体心立方（bcc）单质Cr析出的母相。确定了Cu-1．56Cr合金时效过程的析出惯序为面心立方（fcc）的Cu基固溶体（无序结构）→fcc演化的调制结构I→调制结构Ⅱ（典型的DO3结构）→bcc的Cr单质析出相。此两亚稳结构为由fcc过饱和固溶体到bcc析出相的结构变迁提供了过渡。     

新余锰铁高炉炉料结构改进探讨

简介了我国锰铁高炉炉料结构及生产概况，根据合理炉料结构条件对新余锰铁高炉炉料结构进行了分析，并就其炉料结构的改进措施进行了探讨。     

关于组织结构柔性化的探讨

介绍了柔性组织结构这一先进的组织方式的先进性及作用。阐述了在当今市场和经济条件变幻莫测的情况下实施组织结构柔性化的重要意义。探讨了实现组织结构柔性化的具体方法，并且对组织结构柔性实施过程中可能出现的问题提出了解决办法。最后提出虚拟公司是今后组织结构发展方向，并构建了虚拟公司的组织结构模型。     

混凝土结构加固设计分析

文章针对混凝土结构加固的受力特征进行了详细分析,并提出了几种结构加固方案.提高结构加固设计承载力以及增强结构延性和整体性能,文章对结构工程加固具有实际意义.     

半空心铝型材一模四孔保护式分流模结构

介绍了一种针对半空心型材而设计的一模四孔保护式挤压模结构,并详细描述了这种新型结构有关参数的确定,主要包括结构的组成、分流孔的设计、下模焊合室结构与工作带的选择等.这种新款一模四孔分流结构打破了传统的由二件组成的结构而采用了由三件组成的形式,具有结构简单、便于加工等特点.实践表明,这种结构模具可大幅度提高挤压机的生产效...     

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。     

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.     

Quality of life of relatives of mental patients

Usage of quality of life of psychiatric patients' relatives as the parameter of estimation of the quality of psychiatric care is considered. By means of standard questionnaire elaborated by the authors as well as by means of both individual and group conversations the quality of life was analyzed in 40 relatives which lived together with psychiatric patients. Different spheres of their life and difficulties (financial, social-psychologic, production) were examined in families with such patients. The defects of psychiatric care that had direct influence on the quality of life of the psychiatric patients' relatives are outlined.     

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)