氮氧混合气体高压脉冲电晕放电等离子体的分子束质谱诊断研究

利用具有三级差分抽气系统的分子束质谱仪为检测手段，对N2，O2混合气体的线板式高压脉冲电晕放电等离子体阴极板区的正离子成分进行了诊断研究。实验结果表明：在放电反应室N2,O2混合气体压力1330～3325Pa，峰值电压4～10kV及放电重复频率10～100Hz范围内，N2^ 和O^ 流强相当，N^ 流强约为N2^ 流强的2～10倍，N^ 、N2^ 和O^ 流强随脉冲峰值电压、放电重复频率的升高而增大，随放电气压的变化则存在一极值。     

中小型企业网的构建及应用

网络给企业带来了种种便利和新的商机,通过网络企业不仅仅更快得到产品及技术方面的最新资讯,并且带来了更为广阔的市场。对于企业来说,架设一个属于自己的Internet网站,使外界通过网络了解企业,或者进一步通过网络实现电子商务,已经成为当代企业的必经之路。     

填充床放电反应器灭活铜绿微囊藻的机理

为了得到一种合理有效的铜绿微囊藻去除方法,研究了填充床放电反应器灭活铜绿微囊藻的机理,主要考察了放电对藻细胞数的影响、细胞形态的影响和生长的间接影响,以及过氧化氢在藻细胞外产物溶液中的浓度和稳定性,外加过氧化氢对藻生长的影响。结果表明:放电处理当天藻细胞数下降不太明显,但在放置培养过程中下降明显;藻处理后的扫描电镜图显示细胞表面受到严重破坏,细胞内物质溢出,细胞出现孔洞;处理后的藻细胞外产物溶液对藻生长率的影响随着放置时间的增加而下降,整个放置培养期间,离心前藻细胞的光密度较离心后的略有降低;放电产生的过氧化氢浓度为μmol/L量级,且随着放电处理时间的增加而增加,但放置培养期间呈一级下降趋势;填充床放电反应器灭活铜绿微囊藻主要机理或原因是放电产生的物理和化学的综合作用导致铜绿微囊藻细胞死亡,过氧化氢的相对稳定存在加强了一些本已受到放电破坏的藻细胞损伤程度,使这部分细胞不能自身修复而逐渐死亡。     

A Study of Removing Chlorobenzene by the Synergistic Effect of Catalysts and Dielectric-Barrier Discharge Driven by Bipolar Pulse-Power

In this study, the improvement in the removal of chlorobenzene （C6H5Cl） in the air was investigated by combining dielectric barrier discharge （DBD） driven by bipolar pulse-power with catalysts. Molecular sieve 4A （MS-4A） and MnO2/γ-Al2O3 （MnO2/ALP） as two kinds of catalysts were tested at different positions in a DBD reactor. Catalysts were located either in the discharging area between two electrodes, or just behind the discharging area （in the afterglow area） closed to the outlet. The results indicated that DBD reactor with a bipolar pulse power-supply produced strong instant discharge and energetic particles, which can effectively activate catalysts of MS-4A and MnO2/ALP located in the afterglow area to achieve the synergistic effects on effective fission of chemical bonds of chlorobenzene. It was considered that the gas-chlorobenzene and the chlorobenzene adsorbed on the catalysts were decomposed simultaneously.     

气相脉冲放电水中H2O2生成影响因素研究

为了考察气相脉冲放电时水中H2O2生成规律,采用针-板式反应器,进行了实验,研究放电电压、气体流速、电极间距以及pH值对水中H2O2生成的影响．实验结果表明：提高放电电压,能够促进水中H2O2的生成;当气体流速为1．6L／min时,水中H2O2浓度最大;减小电极间距,电场强度增大,有利于H2O2的生成;酸性条件时水中H2O2浓度较大．     

低分段废石充填法回采破碎薄矿体的实践

根据罗山岔矿５２＃脉矿岩破碎、节理裂隙发育、开采技术条件复杂的特点，成功地应用用了低分段倾斜工作面废石充填法回采破碎薄矿体，通过对该采矿方案的介绍，阐述了其结构、回采与充填工艺、采取的技术措施及取得的丰要技术经济指标。     

A comparative study on the activity of TiO2 in pulsed plasma under different discharge conditions

In the present study,a combination of pulsed discharge plasma and TiO_2(plasma/TiO_2)has been developed in order to study the activity of TiO_2by varying the discharge conditions of pulsed voltage,discharge mode,air flow rate and solution conductivity.Phenol was used as the chemical probe to characterize the activity of TiO_2in a pulsed discharge system.The experimental results showed that the phenol removal efficiency could be improved by about 10%by increasing the applied voltage.The phenol removal efficiency for three discharge modes in the plasma-discharge-alone system was found to be highest in the spark mode,followed by the spark–streamer mode and finally the streamer mode.In the plasma/TiO_2system,the highest catalytic effect of TiO_2was observed in the spark–streamer discharge mode,which may be attributed to the favorable chemical and physical effects from the spark–streamer discharge mode,such as ultraviolet light,O_3,H_2O_2,pyrolysis,shockwaves and high-energy electrons.Meanwhile,the optimal flow rate and conductivity were 0.05 m~3l~(-1)and 10μS cm~(-1),respectively.The main phenolic intermediates were hydroquinone,catechol,and p-benzoquinone during the discharge treatment process.A different phenol degradation pathway was observed in the plasma/TiO_2system as compared to plasma alone.Analysis of the reaction intermediates demonstrated that p-benzoquinone reduction was selectively catalyzed on the TiO_2surface.The effective decomposition of phenol constant(D_e)increased from 74.11%to 79.16%when TiO_2was added,indicating that higher phenol mineralization was achieved in the plasma/TiO_2system.     

聚焦娱乐场所温馨舒适背后的隐患 学法规早预防巧逃生莫让小火变大灾酿悲剧

人们休闲娱乐本是为了放松身心,如果连生命财产安全都得不到保证,甚至经历一场惊心动魄的生死大逃亡,那么意义何在？     

基于跟踪式干扰的跳频通信抗扰效能分析

基于跳频通信原理,研究了跟踪式干扰条件下跳频通信抗干扰性能。根据跳频通信处理增益以及跳速与通信距离之间关系的分析,证实了通过提高跳频速率抗跟踪式干扰的相关结论,对于跳频通信装备的作战运用具有一定的借鉴意义。     

引调水工程融合建设抽水蓄能电站的 “调水+”新模式探讨

考虑当前发展阶段引调水工程投资回报率较低、水价普遍难以覆盖建设运营成本的实际，提出“调水+”新 模式，以期通过多重项目功能，发挥综合效益实现总体平衡，解决单一引调水工程当前水价条件下市场化运作困 难的问题。为科学计算“调水+”模式产生的经济效益，主要采用单方调水成本比较法，分别以引调水工程结合纯 抽水蓄能电站以及结合非循环式抽水蓄能电站两种案例，从年运行费、折旧费和利息支出方面测算“调水+”模式 的调水成本，与未使用“调水+”模式的引调水工程调水成本进行比较，并结合各自特点提出水能融合应重点关注 的主要条件。结果表明，两种案例下采用“调水+”模式后，引调水工程单方成本分别降低 0.32 元/m3和 0.16 元/m3。 实际工程应用中“调水+”模式应当全面考虑区域抽蓄和引调水工程的建设需求、工程规模、开发时序、工程调度、 运行成本等因素。研究成果可为充分发挥“调水+”模式经济效益提供新的思路。