无通风结构人工湿地处理污泥渗滤液COD变化

人工湿地处理污泥是人工湿地与污泥干化床技术的结合所产生的新系统,是新型的污泥处理技术。该技术具有建造成本低、运行操作简单的特点,所以已在城镇污水处理、治理富营养化水体、河道生态整治、工农业废水治理等方面得到很好的应用。利用天然植物和微生物等的作用,可以使污泥变的稳定。湿地植物芦苇可以促进污泥的脱水,将污泥转化成具有农用价值的肥料。文章主要对人工湿地运行过程中COD数据进行总结,分析和比较人工湿地中稳定污泥中渗滤液的COD变化,探寻渗滤液的变化规律。     

基于LabVIEW的虚拟脑电图机的设计

脑电图是诊断脑部疾病的重要而先进的手段,但是其成功依赖于适当的仪器设备。本文基于虚拟仪器的思想和Lab-VIEW平台,提出了一个虚拟脑电图机的设计。论文的重点之一为脑电信号输入通道的设计,这些通道由放大器和滤波器组成,目的是得到消除了噪声的真正的脑电波信号。经过调理的信号由一个具有USB接口的数据采集模块予以数字化并传输给在PC上运行的基于LabVIEW的脑电图软件。在实验室制作的样机实现了脑电信号的采集及其分别在时域和频域进行分析的能力。     

低碳发展实践中要避免的几个问题

低碳经济将成为金触危机之后的下一轮经济增长的核心动力,构建低破经济的发展模式,对于落实科学发展观,实现我国可持续发展具有重要意义.本文重点从低碳经济建设实践出发,就如何发展好低碳经济进行探讨研究.     

度汛安全监督检查发现问题分析及监管建议

以汛前汛期安全监督检查工作为例，简要介绍监督检查工作依据和工作内容，梳理汇总12个在建水利工程排查巡查发现的度汛安全隐患问题及产生原因，项目涉及2区4县。并以此为基础，有针对性地提出监管建议。     

等离子体阵面吸收与反射电磁波的实验探索

利用等离子体平面阵,依此研究50 MHz-3 GHz电磁波入射等离子体阵面所造成的衰减和反射.研究发现辉光等离子体阵面对人射电磁波具有强吸收弱反射特性.在实验频率范围内,等离子体阵面对电磁波都有一定的吸收作用,吸收值在9.9～25.6 dB之间,但在不同频段也存在着明显的吸收峰值.同时,虽然等离子体阵面对入射电磁波确有...     

Characteristics of DBD micro-discharge at different pressure and its effect on the performance of oxygen plasma reactor

The oxygen plasma reactor based on dielectric barrier discharge principle can produce a high concentration of reactive oxygen species, which can cooperate with hydraulic cavitation gas–liquid mixer to realize the application of advanced oxidation technology in water treatment. In this technology, the work pressure of the oxygen plasma reactor is decreased by the vacuum suction effect generated in the snap-back section of the gas–liquid mixed container. In this paper, the characteristics of single micro-discharge at different pressures were investigated with the methods of discharge image, electrical characteristics and spectral diagnosis, in order to analyze the electrical characteristics and reactive oxygen species generation efficiency of oxygen plasma reactor at the pressure range from 60 kPa to 100 kPa. The study indicated that, when the pressure decreases, the duty ratio of ionization in the discharge gap and number of electrons with high energy increases, leading to a rise in reactive oxygen species production. When the oxygen reaches the maximum ionization, the concentration of reactive oxygen species is the highest. Then, the discharge intensity continues to increase, producing more heat, which will decompose the ozone and lower the production of reactive oxygen species. The oxygen plasma reactor has an optimum working pressure at different input powers, which makes the oxygen plasma reactor the most efficient in generating reactive oxygen species.     

Research on resonance parameters matching based on partitioned operation method of atmospheric pressure plasma reactor array

Matching optimization of resonant parameters among the high power inverters, low power transformers and plasma reactors have significant effects on the performance and output of the reactor array when applying the partitioned operation method. In this paper, the Matlab/ Simulink electrical model was established based on the method of partitioned operation. The matching relation between resonant parameters is analyzed on the basis of experimental result. As a consequence, transformer leakage inductance and working frequency are the important parameters influencing the operational efficiency of system, leakage inductance of transformer should be adjusted based on the equivalent capacitance of plasma reactor to realize the matching optimization of resonant parameters.