State-based analysis of labour productivity

Establishing efficient continuous improvement processes requires industrial companies to analyse their productivity quickly on different work system levels and to link productivity losses with suitable improvement measures in the course of productivity management. Common productivity analyses are either narrowed to certain functions of a production process or they do not possess a sufficient level of detail to derive goal-oriented improvement measures. The challenge is to gain production data with a relatively low effort and to gain broad transparency over productivity losses from the work place to the company level at the same time. This paper presents a new methodology for the comprehensive analysis of the various impacts on labour productivity, relying on state-based modelling of worker activities in serial production. Typical application areas include the automotive industry or the production of home appliances. The approach combines straightforward data acquisition methods with a structured evaluation process as foundation for the productivity management on different work system levels, including work stations, production lines, production segments and the plant. An integrated matching procedure processes the analysis results and yields a set of applicable improvement methods from a definable toolset. Compared with existing methodologies, the underlying model promises a reduced data acquisition effort and high usability. Its potential for practical application is shown with two industrial case studies.     

上海世博园后滩公园湿地景观设计

介绍了上海世博园后滩公园湿地的设计情况,包括其功能分区、水质目标、工艺流程、水质调控管理及预警系统等。2009年4月,清水区已达到很好效果,多项水质指标均已达到Ⅱ～Ⅲ类水体标准。生态湿地景观的多种独特功能提供了可观的经济效益、社会效益以及生态效益。     

符合环保要求和盈利的炼钢

巴登钢厂多年来采用了环境保护管理理念.致力于减少钢厂向大气、水和土壤中的排放,而且还开发了诸如钢渣、灰尘、氧化铁皮回收作为副产品.这些理念的成功可以看到巴登钢厂的排放值很低,也从副产品回收得到利润.其他诸如减少噪音和检测来自废钢并进入钢铁制造过程中的放射源,这个问题越来越引起钢铁界重视.根据25年来钢铁行业环保的工作经...     

生态系统服务的量化与评估

随着生态系统服务研究的深入,从供需角度量化和评估生态系统服务成为生态管理的关键技术.基于生态系统服务的理解和已有研究的比较分析,论文针对当前量化和评估手段的不足,在环境系统承载力的框架下提出采用综合叶面积指数表征生态系统服务,并利用生态承载剩余率评估生态系统服务的承载状况.选择了宁波市进行案例研究,验证量化和评估方法的...     

Development and Application of Magnetic Segregation Feeder in Sintering Machine

The size segregation of sintering materials in a chute flow is utilized to prepare well‐bedded feedstock for sintering quality improving, and magnets are installed below the chute to enhance size segregation. By the braking role of magnetic force, the particles of different sizes which poured down to sloping chute are separated:the coarse particles drop to the far‐side of the sloping chute and the fine particles drop near the sloping chute. As the sintering pallet is continuously moving, the coarse particles are distributed into the lower portions and the fine particles are aggregated on the top of the layer..By using the non‐contacting magnetic force,the technique of magnetic segregation feeding overcomes a series of defects such as adhering and wearing in the existing segregation feeding devices. and the device is characterized by simple structure, easy operation, no need of energy,and safety, etc. Discrete element method (DEM) simulations are carried out to explore the optimal arrangement of the magnets.The simulations show that proper magnetic field can significantly enhance the segregation,and the simulation results are in good agreement with the experiments and industrial systems designed with consultation to the results.Depend on those,the technique of magnetic segregation feeding have been developed and applied in the three sintering line of Baoshan Iron & Steel Co., Ltd..The results of industrial application show that the distributions of particles, carbon and FeO in sintering layer have been remarkably improved. In guaranteeing to the quality of sintering ore materials, the productivity of sintering strand raised 2.1% and the fuel ratio decreased 1.7%.     

优化电炉除尘系统

世界上大多数电炉除尘系统的设计和建造遵从特定的环境法,并在确定的工艺和产能的极限值内。但是自金融危机以来,钢铁生产厂为了迎合市场的需求,不断被迫调整炼钢工艺,对市场的波动作出恰当的反应(如变通加入的原料)。这样,许多现有的除尘系统就不能应对这一挑战了。德国巴登钢铁工程技术有限公司(BSE)优化除尘系统以满足各种工艺要求。在严格遵守环境标准和当地法规的前提下,同时提高了生产率和成本效率。     

短波红外垂直失水指数观测误差估计方法及其同化方案

发展了一个基于短波红外垂直失水指数的土壤水分观测误差空间分析方法,据此改进了以遥感和生态过程模型为基础的两阶段土壤水分同化方案.通过实地同化实验,证明了改进的土壤水分同化方案能较好地体现空间植被覆盖和数量的异质性导致的表层土壤水分的空间变异,进一步提高了遥感数据在空间上的同化精度.     

提高GQM2136球磨机生产效率的改进设计

球磨机在选矿工艺中起着十分重要的作用,其生产效率是企业看重的关键指标。针对GQM2136球磨机的生产实践,分析了提高球磨机生产效率的主要因素,并提出了有效改进方法。为高效节能球磨机设计提供了思路与方法。     

利用优化设计和节点分析方法确定吐哈丘东气田气井产能方程

利用优化设计软件对影响气井产能的6个主要参数进行了优化设计,在优化设计的基础上利用节点分析方法对设计出的33种参数组合进行了产能计算,并进一步回归出了气井产能方程;经与节点分析的结果对比,产能方程的平均相对误差为0.31％,利用半正态图评价了各参数对气井产能的相对重要性.运用该方法可以计算给定区块内每口井的产能,也可以...     

基于动态渗透率效应的低渗透油藏产能新观点

目前,常用拟启动压力梯度方法来处理低渗透低速渗流阶段的非达西线性渗流规律,但这种方法存在一定的不合理性;而动态渗透率效应模式能很好地反映低渗透油藏的渗透率及其对应的拟启动压力梯度随驱替压力梯度的变化.据此,用差分法.得到了一种新的油井压力与产量计算方法.动态渗透率效应对产量影响较大,通过与传统的达西和带启动压力梯度方法...