3D虚拟孪生可视化系统在河钢承钢的应用

介绍了3D虚拟孪生可视化系统在河钢承钢钒钛高强冷板连续酸洗与热基镀锌生产线的应用情况.利用3D仿真技术建立了连续酸洗和热基镀锌虚拟生产线,并通过实时生产数据驱动3D虚拟生产线与实际生产线同步,建立产线的3D虚拟孪生系统,实现对生产过程的全方位实时智能监控,并用于生产人员的技能培训.该系统的实施提高了产线的生产监控效率,...     

轧制过程自动化实时数据采集与离线分析系统

结合轧制过程自动化生产线的特点,自行设计了符合生产线实际要求的基于Windows的轧制过程自动化实时数据采集与离线分析系统。系统硬件使用SIEMENS CP5613 A2作为高速数据采集卡直接插入工控机PCI插槽,通过Profibus DP使用主从站方式连接基础自动化,软件在线实时数据采集使用Windows系统服务模式进行高速数据采集并对数据进行压缩存储,离线数据分析使用图形曲线分析技术实现对生产数据的再现。该系统已成功应用于国内热连轧生产线中,数据采集稳定可靠,数据分析功能满足实际需要。     

基于MES的数据采集系统升级改造

针对传统的棒材生产线在生产过程中存在的生产数据记录滞后,实时监控和数据统计困难,数据的可靠性差,利用率低等问题,天钢棒材厂采用了基于MES的棒材生产线数据采集系统加以解决。对MES系统的应用背景、工作流程、数据采集点、采集过程、采集方式进行了论述。对升级改造中遇到的问题提出并实施了解决方案,搭设了天钢棒材厂生产控制系统与生产管理系统之间的信息桥梁。数据采集系统实现了各生产环节的分散控制,生产数据的集中管理。     

CSP生产线MES中的动态生产调度系统建模

动态生产调度系统是CSP生产线制造执行系统(MES)的重要组成之一，它处理MES与过程控制系统之间的信息交互，并对生产执行过程中的各种变化做出实时响应。本文采用面向对象技术，分析CSP生产环境的特点，建立基于统一建模语言的CSP动态生产调度系统模型。     

过程数据采集与分析系统在冷连轧机组中的应用

当代冷连轧带钢生产线具有生产速度快、控制精度高的特点,因此在实际生产过程中,需要一种能够对生产机组各种过程数据进行高效处理的数据采集系统。鞍钢冷轧钢板(莆田)有限公司冷连轧机组使用iba公司的PDA设备,组建了一套可对冷连轧机各种运行过程数据进行实时高速采集、监控、记录及分析的数据采集系统,该系统的使用为生产技术人员快速诊断冷连轧机组故障提供了有力的数据支持。     

带钢生产线板形板厚的解耦控制

针对轧钢生产线板形板厚具有强耦合、强干扰、时变和非线性的特点,提出板形板厚自适应解耦的方法,在被控对象进行在线辨识的基础上,对自适应控制参数进行实时调整,使系统具有自适应性,仿真结果表明解耦效果良好.所提出的方法成功应用于某钢铁厂的轧钢生产过程,实现了轧钢生产过程的优化控制、优化运行和优化管理,取得了明显的应用成效.     

韩国产多功能辊缝仪在莱钢2号板坯连铸机上的应用

介绍引进韩国的POWERMnC铸机生产线监控系统——多功能辊缝仪的功能、特点及应用情况,为实时监控设备生产状况和设备维护维修提供了可靠技术依据。     

炼钢和轧钢连续生产线调度管理模型(一)

炼钢和轧钢连续生产线应以连铸与电炉的配合方式，可分为三种生产模式，并针对其中一种生产模式，探讨了理想调度管理模式的建立和实时仿真管理模式的运行情况。     

兼容生产棒材、角钢、槽钢的生产线设备配置特点

昆钢红河型钢生产线是一条既能生产圆钢、螺纹钢又能生产角钢、槽钢的全连轧生产线。生产过程中,角钢、槽钢翘头翘尾甚至是扭转变形现象较为普遍,所以相对普通棒材生产线,本生产线对冷床区设备、冷剪、以及后续的离线矫直设备等提出了更高的要求。本文主要介绍了生产线工艺设备配置特点,说明设备的设计思路,以满足兼容三种产品的生产需要,为其他厂提供了设计经验。     

薄规格耐腐蚀集装箱板轧制技术研究

以首钢某热轧生产线为研究对象,为提高生产线的制造能力,分析了薄规格集装箱板轧制过程中的技术难点。运用PDA等数据分析工具,分析了生产过程中各类影响薄规格轧制稳定性的问题,如过程温度控制、速度控制、板形控制等关键参数,同时提出了解决方案。该生产线实现了薄规格集装箱板的批量稳定生产。     

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)