查询词典 coal mine

Taking the soft-sensing of oxygen content in flue gas,unburned carbon content in fly ash and coal load in ball mill as examples,we...

以烟气含氧量、飞灰含炭量、球磨机负荷为例，着重分析和总结了其测量的现状、软测量建模方法和二次变量的选取，并概括了国内现有的其他热工参数软测量技术，对火电厂热工参数软测量技术的发展具有一定的指导意义，对热工控制系统的优化具有一定的参考价值。

The main reasons of such explosions are that the velocity of primary air is too low when turn on and off the pulverizing system and the level of the coal in ball mill is too high.

通过分析，启停制粉系统时一次风速过低及磨煤机料位控制过高是造成爆炸的主要原因，为此提出制粉系统运行控制要点，及增加磨煤机火灾保护逻辑，效果明显。

The controlled variables of ball milling are the negative pressure in the input, the temperature in the output and the given coal storage of the ball mill.

球磨机制粉系统的控制量为存煤量、出口温度和入口负压。

Ball mill coal pulverizing system of pelletizing plant is a complex nonlinear multivariable process with strongly coupling and time-delay,and its operation often varies significantly. The automatic control of such a system is a research focus in the process control area.

球团厂钢球磨煤制粉系统是多变量强耦合、时滞、非线性以及生产工况变化大的复杂对象，其自动控制问题一直是控制界关注的热点。

Pulverized coal milling system ; ball mills ; modeling ; decoupling cont rol ; fuzzy control ; neural network ; predictive control ; adaptive optimization

制粉系统；钢球磨煤机；建模；解耦控制；模糊控制；神经网络；预测控制；自适应优化

The PI controlling system with the ability of intelligent logic judging method, can decide to choose perfect controlling operations, according to the height of coal in the ball mill, entrance pressure and the exit temperature error, which can avoid to operate wrongly because of the inter-inference of different control.

带有智能逻辑判断功能的PID控制系统，采用智能逻辑判断方法，根据磨煤机入口负压及出口温度所处的偏差区域，确定应该采用的控制操作，可以有效地避免由于各控制过程之间的相互干扰而导致总体控制效果严重恶化甚至整个控制系统无法正常投入等问题。

During this research, detail test and analysis proved that vibration signal of ball mill can represent coal level of the ball mill and steel balls distribution. The test result could help to resolve a main problem of ball mill load measurement. The intelligent scheme for pulverizing system which was based on multi-sensors fusion technique as well as the intelligent control method was given in the thesis.

本文通过大量的分析研究和现场试验，通过对球磨机振动信号进行频谱分析，监测磨筒存煤量和钢球球径分布情况，初步解决了球磨机测控中一个关键问题；在此基础上，采用软测量、多传感器信息融合技术，引入神经网络模型等方法，并考虑与电厂DCS和计算机信息系统的连接，对智能化球磨机制粉系统进行了总体设计，在技术上有所创新。

Beneficial conclusions are achieved by analyzing the two important factors (in-put and out-put pipe diameter, coal ball mill fill ratio) influencing the inner flow field.

通过研究磨煤机的填充率和进出口管道口径的大小，对其内部气相流场的运动规律有一定认识。

This paper is the first one describing the inner thermal flow field of the BBD coal ball mill by numerical simulation . It bases on the practical condition of the 40.53 type BBD.

基于40.53型直燃式双进双出磨煤机实际工况条件，首次对BBD磨煤机流场进行了热态数值试验研究。

Ball mill coal pulverized system is a complex multivariate object with strong coupling and great inertia.The primary variables being controlled are temperature at the output,negative pressure at the input,differential pressure,and mill load,etc.

中储式钢球磨制粉系统是一个多变量、强耦合、大惯性的被控对象，其主要被控量是球磨机出口温度、入口负压、入出口差压、磨煤机载煤量等。

You can snipe the second and third union leaders from this position.

您可以鹬第二和第三工会领袖从这一立场出发。

Aiming at the currently shortage of XML streams quality detecting, this paper proposes a new forecasting method of XML streams quality by least squares support vector machines, which is used the method of XML keys' vector matrix as windows, and vector product wavelet transform to multilevel decompose and refactor the XML streams series, that can fulfill real-time checking demand of XML quality, and ensure constraint, consist- ency and integrality. For even more adapting net load, it proposes a control strategy by weight and adaptive adjustment to ensure XML streams quality.

针对当前XML数据流质量检测存在的不足，提出构建XML键的矢量矩阵作为窗口，利用矢量积小波变换多级分解与重构XML数据流，再结合最小二乘支持向量机对XML数据流质量进行预测的一种方法，满足XML数据流质量重构时实时检测的要求，保证XML数据的约束性、一致性与完整性；为了更好的适应网络负载，采取加权与自适应窗口调整等调度策略充分保证XML数据流的质量检测。