天铁6号高炉上料控制系统程序设计与应用

叙述了天铁6号高炉上料控制系统程序设计与应用过程.通过对高炉上料系统的研究分析,设计出能够准确控制上料系统的自动控制程序.经过实际应用节约了操作时间,提高了上料速度.对于应用中出现的问题,通过调试和采取相应改进措施,达到了良好的上料效果,保障了高炉正常生产.     

DCS在鼓风炉上料控制系统中的应用

介绍了由Network6000 DCS组成的鼓风炉自动控制上料系统的结构和功能，详述了系统的组态软件，上料系统流程及料斗称重控制程序等。     

MAERZ石灰窑上料自动控制系统

主要介绍了麦尔兹石灰窑上料控制系统的设计、工艺控制要求及系统特点。     

高炉卷扬测速电机改造

高炉卷扬测速电机是用于反馈料车运行速度、控制和保护上料系统的装置。为保证测速电机及高炉上料系统的正常运行,采取一系列改进措施,保证测速电机正常运行,从而保证高炉生产运行正常。     

高炉卷扬上料小车自动控制系统的实现

高炉卷扬上料小车是活性石灰竖炉及其他工业竖炉的主要生产设备之一 ,广泛用于冶金行业。卷扬上料小车在系统中起着至关重要的作用 ,该设备能否正常运行直接影响高炉炉况、产品的质量和产量。根据石灰竖炉生产工艺要求 ,载料小车采用双斗供料模式 ,小车在上料过程中采用变速运行 ,整个上料周期要根据炉况及产量而进行调整。载料小车的运行模式由主令控制器和ＰＬＣ来实现 ,运行速度由变频调速器调节 ,整个系统控制规模大 ,控制点多 ,不但要求有测速、数据处理、ＰＷＭ控制、位置显示、数值报警、模糊控制（根据炉况调整小车上料周期）等功能…     

酒钢7#高炉矿槽自动上料系统的改造设计与实现

高炉上料系统作为高炉工艺的设备基础,系统的稳定运行对高炉顺行有着重要意义。本文通过对高炉上料系统的自动化改造设计与实践,实现了上料系统的自动化,为其它高炉实现自动上料奠定基础。     

广钢4号高炉PLC程序改进

广钢4号高炉1994年建成投产,本文针对PLC对自动化上料系统控制程序部分,进行了改进,并取得良好效果。     

AB计算机在包钢6#高炉上料系统的应用

文章介绍了包钢炼铁厂6#高炉上料系统的工艺控制,详细论述了AB计算机ControlLogix系统的组态、网络及控制等,经过实践证明,ControlLogix系统应用稳定、可靠,满足了高炉上料复杂工艺控制的要求。     

3号窑上料系统石头闸板阀的改造

耐火材料厂炉料车间3号窑是用来生产轻烧白云石的，其上料系统中的石头电子秤料斗底部的闸板阀开关不顺，造成不能正常上料和称量不准，对生产造成严重影响。     

“584PC”在高炉上料控制系统中的应用

鞍钢7~#高炉中修时,采用MODICoN584PC实现了上料系统的自动控制。实践表明该操作系统工作可靠、操作简便、维护容易,故障率减少了约90％。本文介绍了该系统的设计、安装、调试和运行情况。     

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.     

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)