基于单片机技术的广播定时控制系统的设计

介绍了单片机控制的智能广播播放系统的组成、工作原理及特点,具体描述了单片机计时控制电路、控制执行电路和抗干扰电路的电路组成。对改造传统的人工控制设备,提高工作效率提供了一种有效的方法。

浅谈给排水工程施工中的成本控制要点

目前，随着社会发展需求，建筑行业也随之发展迅速，同时也给排水施工企业带来了巨大的发展前景．这必然给排水企业的管理工作提出了相应的要求。企业经营的最终目的是利润最大化，而利润最大化的实现需要企业以科学的施工成本控制得以实现。下文主要通过给排水项目施工过程的成本控制，做出了简要综述总结。

An optimized control of ventilation in coal mines based on artificial neural network

According to the nonlinear and time dependent features of the ventilation systems for coal mines, a neural network method is applied to control the ventilator for coal mines in real time. The technical processes of coal mine ventilation system are introduced, and the principle of controlling a ventilation fan is also explained in detail. The artificial neutral network method is used to calculate the wind quantity needed by work spots in coal mine on the basis of the data collected by the system, including ventilation conditions, environmental temperatures, humidity, coal dust and the contents of all kinds of poisonous and harmful gases. Then the speed of ventilation fan is controlled according to the required wind which is determined by an overall integration of data. A neural network method is presented for overall optimized solution or the genetic algorithm of simulated annealing.