多总线数据采集系统的研究

随着工业互联网的高速发展，数据成为企业的重要资源，数据采集监测平台面对的是多总线协议并存的工业现场传感器。文章研究了多总线数据采集监测系统在韶钢能源管理系统(EMS系统)的应用，对其实现的关键技术OPC技术进行了探讨。同时，将多总线数据采集技术通过虚拟仿真进行实验证明，对现场总线技术的实践教学有重要意义。     

Win CC高速数据采集系统在轧线上的应用

莱钢宽厚板数据采集系统通过Win CC ODK实现与二级服务器的数据通讯,通过OPC协议采集现场交换机及监控机状态,通过Simatic S7 Protocol Suite协议采集轧机、热矫、冷床等PLC系统状态,通过TDC PMC TCP协议采集轧机TDC系统状态,利用Win CC的VB强大底层通讯能力开发访问二级Oracle数据库,从而实现了轧线生产全方位的数据信息采集。     

基于全液压矫直机以Simatic．net为服务器的OPC客户端编程

基于全液压矫直机以Simatic．net为服务器的OPC客户端编程，目的是实现上位数学模型程序与下位西门子S7—400的数据通讯。OPC技术的采用使得现场设备与系统的连接更加简单、灵活、方便，数据的传输更加快捷、精确。通过现场的实验表明，该客户端程序的编写成功地实现了复杂数据的传输。     

OPC技术及其在数据采集中的应用

在工业自动化中,OPC技术的应用越来越广泛,它为现场工业控制设备与控制软件之间的数据交换提供了统一的数据存取规范.文章简单介绍了OPC技术,并给出了OPC数据存取服务器设计与实现的方法,以及利用OPC技术实现现场数据与管理层的集成.     

工业大数据在生产监控系统中的应用

针对生产过程中存在的信息孤岛问题,设计了基于工业大数据的生产数据采集监控系统,本文详细描述了生产数据采集系统的总体架构及设计方法。采用OPC协议和Modbus协议,由数据采集网关完成现场数据采集并将数据远传到生产管理中心的实时数据库服务器,管理中心对采集的数据进行储存、处理、分析、转储和画面显示,管理者根据数据信息对生产过程进行全流程监控管理,实现了流程优化、设备智能管理、物料平衡和降低能耗。     

分布式控制系统在海关监管罐区中的设计与应用

针对海关监管罐区的特点,设计了一套基于分布式控制系统的解决方案.方案集现场数据采集、安全TV视频监控和管理信息于一体,并大量采用现场总线技术,运用OPC技术实现两种上位机软件之间的数据通信.实践证明,该系统运行可靠、平稳,有力保障了海关监管的需求,对类似监管场合具有很好的借鉴作用.     

基于欧姆龙协议宏的过程数据监控系统

针对生产线工位多,设备多的复杂工况,设计一个以欧姆龙PLC为控制核心;工业以太网、现场总线为通信桥梁的;以组态软件为辅助的控制系统,实现不同人员对数据的需求。分析锂电材料车间各设备自身通信协议与欧姆龙PLC不兼容的问题,采用协议宏软件实现协议转换以及信息处理的工作。实践证明,该方案解决了现场仪表与PLC之间的通信障碍,并通过上位机辅助信息处理使得PLC能更有效地完成控制任务及数据采集。     

钢铁企业生产数据管理系统的开发

为了建立厂级管理系统,开发了基于OPC技术和数据库的工业生产数据管理系统,实现了生产数据采集及Web的数据发布功能,同时实现了通过Modbus/TCP协议向企业级能源管理系统提供数据的功能。应用表明,系统运行稳定,数据传输可靠,满足了生产管理的需求。     

VD精炼炉数据采集平台的设计与开发

针对VD精炼炉生产过程数据无法和冶炼炉次进行关联,完全依靠人工记录且不能溯源,导致管理人员不能从整体上对生产过程进行分析和管理的问题,设计和开发了基于OPC技术、C/S架构的数据采集平台,实现了不同现场设备、仪表和监控系统实时生产数据的可靠采集和计算。     

基于OPC协议的EMS系统数据采集设计与实现

文章结合能源数据采集系统以西门子工业控制网络SIMATICNET和S7PLC为例,介绍了OPC数据采集系统的结构和具体实现方法,使用OPC接口与现场PLC进行通讯数据采集,应用C#编程语言进行采集数据并通过网络保存到能源管理系统数据库,为能源管理系统提供数据基础,为企业提供统计数据依据。     

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。     

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。     

Comparison of the results of surgical and conservative treatment of fractures of the diaphysis of the tibia

In this paper is treated the fundamental problematic of the fracture of the diaphysis of the tibia and the therapeutic results after the conservative and operative treatment are confronted. Among 518 patients with 433 open fractures and 35 with closed fractures of the diaphysis of the tibia, successful treatment of more 2/3 was obtained in the period from 1968 to 1972. Following our casuistics and literature, whose results are similar, we find out that the average total treatment of the osteosynthesis of the fracture of the diaphysis was shortened for 2,5 months depending upon the type and the localisation of the fracture. Apolied methods of the operative and conservative and conservative treatment in relation to the velocity of the medical cure as well as to the extreme anatomical-functional results are analised. We noticed that osteosynthesis, made by the intermedullary nail and the extension of the canals or by a small AO table, by the achieved stability makes conditions of immediate motions and an early rehabilitation. Because of that it gives the best functional results.     

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.     

参与式农业基地建设行动方案设计

为了编制实用性强的基地建设行动方案,首先,确定参与式发展的主体,搭建一个"决策框架";其次,针对行动目标,提出不同参与主体,如管理者、农民、消费者等团队与个人的目标及行动内容;最后,工作应向重塑伙伴式合作关系,挖掘农民自我发展潜力,完成三大角色的转换,打造农业基地文化等方向推进.