燃油系统参数对分层燃烧甲醇发动机性能的影响

针对1130单缸柴油机研究了喷油嘴油线分布、喷油嘴孔数和喷油嘴针阀开启压力对分层燃烧甲醇发动机性能的影响。试验结果表明，燃油系统参数对分层燃烧甲醇发动机的性能有比较明显的影响。     

机车转产换型过程中职工素质教育的实践与体会

随州机务段机车转产换型时间短、速度快,过渡平稳.成效为何如此显著?就是因为抓住了职工素质教育这一关键.四年多来,他们讲形势,教育职工重视学;优化环境,引导职工自觉学;建立机制,强迫职工必须学,终于出了成效.     

MULTI SUPPORT VECTOR MACHINES DECISION MODEL AND ITS APPLICATION

IntroductionStatistical Learning Theory( SLT) is a small-sample statistical theory by Vapnik etal.SupportVector Machine( SVM) is a novel powerful ma-chine learning method developed from SLT.SVMis powerful for the problems will small sample,nonlinearity,high dimension and local minima.Currently,SVM has many applications in the pat-tern recognition,function estimation,signal pro-cession,control,and others field[1～ 3 ] .SVM en-hances generalization by principle of the structuralrisk min…     

Steam Pressure Control of 1000 MW Ultra-Supercritical Coal-Fired Power Unit Based on Multi-Model Predictive Control

Ultra-supercritical(USC) coal-fired unit is more and more popular in these years for its advantages.But the control of USC unit is a difficult issue for its characteristic of nonlinearity, large dead time and coupling among inputs and outputs. In this paper, model predictive control(MPC) method based on multi-model and double layered optimization is introduced for coordinated control of USC unit running in sliding pressure mode and fixed pressure mode. Three inputs(i.e. valve opening, coal flow and feedwater flow) are employed to control three outputs(i.e. output power, main steam temperature and main steam pressure). The step responses for the dynamic matrix control(DMC) are constructed using the three inputs by the three outputs under both pressure control mode. Piecewise models are built at selected operation points. In simulation, the output power follows load demand quickly and main steam temperature can be controlled around the setpoint closely in load tracking control. The simulation results show the effectiveness of the proposed methods.