转炉炼钢自动化控制技术

在炼钢行业中应用自动化技术进行转炉炼钢,能够有效提升炼钢精确度和炼钢质量。探究转炉炼钢的自动化技术以及自动化炼钢系统。     

小议我国转炼钢的现状和发展

简述并分析了近年我国转炉炼钢的生产、设备、技术指标等状况,列举了现阶段我国转炉炼钢存在的问题并提出改进思路。     

小议我国转炉练钢的现状和发展

简述并分析了近年我国转炉炼钢的生产、设备、技术指标等状况,列举了现阶段我国转炉炼钢存在的问题并提出改进思路.     

小议我国转炉炼钢的现状和发展

简述并分析了近年我国转炉炼钢的生产、设备、技术指标等状况，列举了现阶段我国转炉炼钢存在的问题并提出改进思路。     

转炉炼钢氧枪控制系统改造

针对转炉炼钢氧枪控制系统存在问题,对氧枪枪位控制进行改造,从检测元件选择、软件编程、改变校枪模式等方面阐述改造过程,改造效果良好。     

氧气转炉炼钢的开发与发展

一、世界氧气转炉炼钢的发展历程　　早在1856年,亨利·贝氏麦(ＨｅｎｒｙＢｅｓｓｅｍｅｒ)发明贝氏麦转炉炼钢法时,就曾倡议过用氧气取代空气在转炉内炼钢,以消除贝氏麦转炉法的缺点之一,即钢中具有较高的氮、磷含量,因当时尚不具备廉价的工业用氧(当时氧气生产成本约为300美元/ｔ),限制了氧在炼钢生产中的应用。　　到20世纪30年代末,在德国,林德———弗朗克(Ｌｉｎｄｅ-Ｆｒａｎｋｌ)的低压、大量制氧出现后,柏林工业大学铁冶金系主任、教授罗伯特·杜勒尔(ＲｏｂｅｒｔＤｕｒｒｅｒ)为清除上述贝氏麦转炉法的缺点,解决钢质量问题,在实…     

150t转炉干法除尘系统泄爆原因分析及预防措施

转炉泄爆是干法除尘系统常见的病害之一。其不仅影响转炉的除尘质量,更对工业炼钢的效率提升具有重大影响。本文在分析150t转炉干法除尘系统内容的基础上,就其泄爆的原因进行分析,并指出具体的泄爆防治措施。以期有利于除尘系统泄爆防治质量的提升,进而促进150t转炉炼钢生产能力的不断发展。     

二○一○年度武钢“文明示范岗位”事迹简介

炼钢总厂二分厂炼钢车间乙班2#转炉炼钢总厂二分厂炼钢车间乙班2#转炉班组连续三年实现无改钢、无回炉、无责任中断事故,重点品种炼成率100%,各生产经营指标连续三年名列车间前茅,连续三年实现无微伤以上事故。2009年该班组是车间唯一零脱控班组,多项指标达到国内一流水平,班组炉长罗志被股份公司授予争创四个一流两化先锋称号;同年12月被     

和“小数点”叫劲的人

炼钢三分厂炼钢车间丙班作业长陶宏伟。先后获得公司劳模、炼钢技术状元等荣誉称号，这系列成绩的取得，与他在转炉炼钢岗位上，不断挑战高标准，较真“小数点”，敢于和一流指标“硬碰硬”的勇气和态度密不可分。     

在百炼中成钢——沙钢集团淮钢特钢公司转炉丙班

江苏沙钢集团淮钢特钢有限公司转炉丙班目前共有组员20名，主要负责淮钢两台100吨转炉的冶炼操作及铁水、废钢等原辅料准备等工作，是集中体现转炉炼钢技术经济指标的核心岗位。     

Market dynamics and investment in the electricity sector

A transition to a low carbon future will include a medium-to-long run period in which intermittent renewables co-exist with conventional fossil fuel electricity generators. Fossil fuel generators have frequent startups and shut-downs during the transition. A dynamic competition model is developed that allows for costly cycling of conventional generators. We analyze long run effects of renewable subsidies and carbon prices in the Electric Reliability Council of Texas system using the dynamic model. Accounting for costly generator cycling leads to large changes in equilibrium outcomes and changes policy predictions. The dynamic model predicts higher subsidies or carbon taxes are required to achieve CO2 reduction targets compared to a static model without costly generator cycling. The dynamic model predicts the cost of CO2 reduction is 40 - 80% greater than the static model prediction. The dynamic model predicts a much larger gap between CO2 reduction costs for carbon taxes and renewable subsidies; $303 million/year, compared to a static model prediction of $209 million/year.     

Cost–raising Strategies in a Symmetric, Dynamic Duopoly

This paper provides a characterization of the set of dynamic models in which symmetric duopolists have incentives to raise a common cost. The advantage of the dynamic analysis over existing static models is that it extends the conditions (restrictive in static models) under which symmetric cost raising is profitable. The model is illustrated by standard examples from industrial organization: quantity and price adjustment, and learning–by–doing.     

基于线性二次型的永磁同步电机最优滑模控制

永磁同步电机的伺服控制系统是一个典型的非线性、强耦合、多输入多输出的系统,负载扰动和参数摄动都会使系统不稳定。针对这一问题,提出了一种基于线性二次型最优的滑模控制设计方法。将滑模控制与最优控制二者的优点相结合,设计了最优滑模控制律,并分别搭建基于传统滑模控制的永磁同步电机速度控制器和基于线性二次型最优的滑模速度控制器的仿真模型,在相同的条件下进行仿真,观察系统在两种控制器下的抗干扰能力。结果表明,不论系统受到突加负载信号还是突减负载信号的干扰,最优滑模控制器都具有很好的抗干扰能力,有效地增强了系统的鲁棒性。所提出的方法提高了永磁同步电机控制系统的动静态性能,对深入研究永磁同步电机控制系统具有一定的参考价值。     

高速公路工程不动产价值的动态收益还原法研究

本文分析了高速公路工程不动产的经营收益构成和运营成本构成,应用随机时间序列模型和工程不动产评估理论建立了高速公路工程不动产的净经营收益动态预测模型和还原率动态预测模型,为实现公路工程不动产价值的传统经验静态评估提升及科学动态评估奠定基础。     

基于模糊控制的三相异步电动机的软起动系统

本系统主要通过对模糊控制器的设计 ,将异步电动机的起动电流既限制在了一定的范围内 ,又可得到较大的起动力矩。由于又采用了参数自调整作为辅助控制 ,不但改善了起动时的动态性能 ,而且改善了稳定运行时的静态性能     

基于动态解耦的卷筒纸印刷机速度-张力控制研究

卷筒纸印刷机的速度-张力耦合,是实现印刷机速度-张力精确控制的一个难题。为了精确控制印刷机的速度-张力,首先建立卷筒纸印刷机机电系统状态方程模型,依据状态反馈动态解耦控制理论,进行解耦控制。仿真结果表明,动态解耦控制在速度-张力控制中具有一定作用,为卷筒纸印刷机速度-张力的精确控制提供了一种有效方法。     

基于UML的煤炭特种车辆运营成本控制系统建模

针对神华神东分公司榆家梁煤矿特种车辆运营情况进行实地调研之后,应用UML统一建模语言阐述出煤炭企业特种车辆成本控制系统的需求分析流程,根据分析确定系统的功能需求,建立系统的用例模型、静态模型和动态模型。系统模型的构建使分析与设计趋于可视化和标准化,促进了程序开发人员的交流与合作,提高软件开发效率,为榆家梁煤矿特种车辆成本控制系统的开发与实现奠定理论基础。     

基于上位机模糊PID控制的自动调压系统的设计

针对电机实验室常用三相调压器的不足,提出了一套在上位机利用模糊PID控制算法驱动伺服机构的调压方案,实现了使三相调压器的输出快速稳定达到上位机软件设定值的功能。系统具备了优良的动、静态性能,并能够克服因电网电压的波动所引起的扰动。最后,通过实测的三相调压器输出波形论证了系统的可行性。     

The transition from products to solutions: External business model fit and dynamics

This article provides empirical evidence and contributes to theory building concerning business model fit and dynamics in the area of solutions business. Business models are seen in this context as going beyond considerations such as offerings and internal processes or even relationships, and as including network and market considerations. Indeed the paper highlights the fact that a business model is not firm-focused, nor dyad-focused, but rather network-, and even market-focused, demonstrating that a business model is not static, but dynamic. Manufacturer and customer continuously shift form and content of their respective business models to adapt both to the needs of the counterpart and to market context. A qualitative case study approach is adopted, with subsequent content analysis. The case study relates to the aerospace industry with focus on a complex engineering firm, one of the largest aircraft manufacturers in the world, its customer — a national airline — and their network partners of various kinds. The data were collected through multiple face-to-face interviews with managers in both companies, as a part and parcel of a network of actors that influences and is influenced by the supplier–buyer relationship. Relationships over time between these firms and network partners are described, highlighting the interplay of products and services related to the provision of solutions. Findings highlight the dynamic nature of business models over the relationship lifecycle between supplier and customer in a complex engineering environment, and the need for reciprocal adjustment of models.     

单片机控制LED显示屏动态显示的设计

介绍了一种利用AT89C52单片机控制LED显示屏的设计方案,使显示屏具有动态显示功能,并能通过上位计算机修改显示内容,通过标准的RS232/485转换模块还可以实现对显示系统的远程控制.