Electroencephalogram characters of parallax stereo watching asthenopia

The electroencephalogram(EEG)characters value of observers can be deduced by collecting brain electrical information when the observers are watching parallax stereo video.The characters value will change clearly when watching asthenopia appear.To investigate the characters of parallax stereo watching asthenopia,the EEG of observers were recorded through the whole watching process of parallax stereo films until watching asthenopia appeared.The recorded EEG data of observers belongs to time-domain information.Fourier transform can process these data to frequency spectrum information.Theαandβwaves average power can be got by Newton-Cotes equation from the information.The ratio ofβpower to the sum ofαandβpower,CV,can be defined as EEG characters value of parallax stereo watching asthenopia and used to estimate the asthenopia degree of observers.Our experiments show that the smaller the CVis,the more serious the asthenopia is.     

10kV配电线路故障及防范措施分析

文章首先从单接地线路故障、接地故障两方面,分析了10kv配电线路的常见故障及原因。进而针对存在的故障诱因,从优化配电设备、强化线路管理、构建防范体系等方面,阐述了10kv配电线路故障防范的若干措施。文章旨在分析配电线路故障,针对性地提出防范措施,进而提高10kv配电线路的运行效率与安全性。     

深部煤层赋存环境温度及对瓦斯吸附影响微观机制

为探究深部煤层赋存环境温度变化及对瓦斯吸附的影响,在研究地温变化规律的基础上,预测了深部煤层赋存环境温度,通过高压容量法测试了5组不同温度下吸附常数,从理论上分析了温度对分子热运动的作用效应,利用Materials Studio软件模拟了5组不同温度下的平均吸附热绝对值。研究结果表明：随着埋藏深度的增加,煤层赋存环境温度呈线性升高;随着温度的升高,吸附常数a呈线性减小,吸附常数b呈现出阶段性变化,在30℃～120℃变化较小,高于120℃后迅速增大;环境温度升高,分子热运动加剧,增加了甲烷分子的脱附速度;平均瓦斯吸附热的绝对值随着温度的升高线性增大,增加了瓦斯吸附难度,降低了瓦斯吸附量。     

建立监测预警系统对建筑余泥渣土受纳场的重要性研究

随着我国城市发展迈入存量更新时代,建筑余泥渣土"围城"和受纳场安全问题越发凸显.以深圳市某渣土受纳场工程作为依托,通过文献研究与实地调研,总结建筑余泥渣土的工程特点及受纳场运营的风险因素,归纳受纳场安全监控所面临的问题,发现传统监测手段已无法满足当前综合安全监控的需要.结合智能传感器、扫描测绘、物联网、云计算等技术,提...