企业在推进ERP建设中面临的问题与对策分析

1 ERP的管理理念不深入 企业推进ERP要经过领导这一关,现在相当一些企业的领导对ERP是什么并不完全了解,总认为企业信息化就等于实施了ERP.     

乳化液浓度自动检测配比系统

本文论述了乳化液浓度自动检测配比系统。文章给出了阻容型浓度、液位传感器的原理、结构和测试电路，以及实现乳化液浓度自动检测与自动配比的系统硬件和软件。系统样机通过了型式试验、防爆和工业性试验。研究结构表明，本系统性能优良，达到了煤矿监控产品技术标准，对提高煤机械自动化程度具有重要意义，推广应用前景广阔。     

Experimental studies of new ductile coupling beams and multi-storey shear walls

The span-depth ratios of coupling beams to interconnect shear walls are generally small, so that brittle shear failure may occur and lead to reduced ductility. In order to improve the ductility of coupling beams for earthquake loading, a new type of ductile coupling beam is proposed in this paper. Along the middle depth of this beam, a slit through the entire thickness (a narrow hole) near each end and two lateral keyways along the remaining middle part of the span are made. The reductions of the stiffness under service load and the ultimate carrying capacity of the beam due to the weakening mentioned above are small and the ductility is greatly increased. Tests of 4-storey walls interconnected by coupling beams in three different constructions (monolithic beams, beams with a through-slit and new-type beams) indicated that shear walls with the new coupling beams possess the best aseismic behaviours under cyclic loading. The proposed new coupling beam has been used in a high-rise building.     

Effect of Nb on the Microstructure and Properties of Cold Rolled and Annealed Mo Microalloyed Bainitic Steel

Two kinds of low carbon bainitic steels,Nb-free Mo bearing and Nb + Mo addition steels,were cold rolled and annealed to investigate the effect of micro-alloying element Nb on the microstructure and properties of Mo microalloyed low carbon high strength bainitic steel. No precipitates were observed in Nb-free Mo bearing steel,whereas,two types of precipitates,i.e.,Nb( C,N) and composite( Nb,Mo)( C,N),were observed in the Nb + Mo microalloyed steel,resulting in precipitation strengthening. The strength of Mo bearing steel was improved by addition of Nb under the same annealing conditions. The grain size of Nb addition steel was almost the same as Nb-free steel. Unlike the obvious grain refinement and precipitation strengthening in hot rolling,the increase in yield strength of Nb addition steels in cold rolling and annealing mainly results from the precipitation strengthening,while the effect of grain refinement strengthening can be almost ignored.     

Dynamic observation of bainite transformation in a Fe-C-Mn-Si superbainite steel

The dynamic observations of bainitic transformation in a Fe-C-Mn-Si superbainite steel were conducted on a high temperature laser scanning confocal microscope. It is indicated that the mutual intersection of bainite sheaves often occurs during growth of bainite ferrite, resulting in an interlocked bainite microstructure. Moreover, bainite transformation is promoted by higher austenization temperature and the longer and finer bainite platelets are obtained. Further, The average growth rate of bainite after austenization at 1 100 ° is calculated as 5.8 µm·s^?1. In situ observation investigation makes it possible to identify bainite transformation in real time during isothermal holding.     

碳热还原氮化一步法制备钒氮合金工艺研究

对V2O5自还原氮化过程进行热力学分析,并以工业级V2O5和炭黑为原料,经过混料、研磨、压制成块后进行烧结和还原氮化,制得含氮量较高的钒氮合金。结果表明,为了避免V2O5在还原过程中挥发,预还原温度应控制在V2O5熔点（678℃）以下;经过650℃预还原4h,试样中的V2O5才能全部转化为低价态的钒氧化物;V2O5在N2气氛下自还原时,还原终温低于1 271℃时,还原产物优先生成VN,还原终温高于1 271℃时,还原产物中才会出现大量VC;为保证还原产物的高氮和低碳含量,应将还原氮化最终温度控制在1 200～1 300℃。     

基于物联网技术的交通信息采集和服务

通过分析我国智能交通系统建设现状和存在问题,结合目前道路交通管理信息采集与服务需求,设计了基于物联网技术的道路交通信息采集与服务框架,以公安交通指挥平台为核心,集成各类交通信息采集与服务系统,实现交通路况信息全天候采集和智能分析、交通信息服务和出行诱导,以及区域交通流协调组织等功能。基于该框架体系,分别从交通流信息采集、交通信息发布与诱导服务、交通信号协调控制、公交优先等方面,对比分析了基于ITS技术的传统应用与基于物联网技术的新型应用的优缺点。结论:物联网技术应用将有利于突破现有ITS应用模式的弊端,提高交通信息采集精度,提升公众出行服务水平。     

现行输电塔设计规范可靠度水准的评估与分析

为了对输电线路杆塔结构设计规范进行较为系统且准确的可靠水准评估,基于 DL/T 5154—2002《架空送电线路杆塔结构设计技术规定》,对输电塔不同受力构件设计表达式的可靠度展开相关研究,分析了杆塔构件荷载、抗力的统计参数及其影响规律。考虑风速、结构重要性系数及风荷载重现期的影响,对设计表达式的可靠度水平进行了精细化评估,考察了我国杆塔现行规范的可靠度水平。     

企业经营机制目标模式的构造及实现

本文根据我国经济体制改革总体规划要求,适应有计划商品经济的发展,遵循企业经营的系统原理,从动力机制、压力机制、约束机制及协调机制等方面构造了企业经营机制的目标模式,并根据我国现阶段经济体制改革的方向和重点,提出了若干具有一定理论与现实意义的实现措施。