Preparation of phenolic resin derived 3-D ordered macroporous carbon

Three-dimensionally ordered long-range macroporous carbon structures were prepared using commercially available phenolic resin by utilizing sacrificial colloidal silica crystalline arrays as templates that were subsequently removed by HF etching after pyrolysis in an argon atmosphere. SEM, TEM, and BET were employed to characterize the morphology and the surface area of the porous carbon structures. The pore size (150–1000 nm) and BET surface area, which reflect pore volume (298.6 m²/g (1.32 cm³/g) ∼ 93.7 m²/g (0.12 cm³/g)), of the macroporous carbon structures produced were approximately proportional to the size (150–1000 nm) of the sacrificial silica sphere templates used (annealing temp. 550°C). The achieved 550 nm porous carbon structures were examined to function as potential catalyst carriers and were successfully impregnated with Ag or Pt-Ru on their inner walls after borohydride reduction at room temperature. In addition, porous carbon patterns were fabricated using the ‘micromolding in capillary’ technique, which has potential applications in the microreaction technology.     

基于PXI总线的LVDS数据采集存储模块的设计

鉴于SAR原始数据量大以及数据传输速率限制的问题,设计了基于PXI的雷达回波和图像数据实时记录模块。大容量数据采集记录系统基于通用的商业PC平台设计,选用FPGA作为主控芯片对电路整体逻辑进行控制;利用LVDS作为数据传输接口对数据进行接收,实现了数据采集、缓存以及通过PXI总线上传至上位机硬盘,以便后续处理。文中介绍了系统方案的总体设计,以及采集存储硬件电路的设计,并对电路的关键技术给以详细的分析。     

高效液相色谱法测定稻·恶乳油中稻瘟净和恶霉灵的含量

本文采用高效液相色谱法 ,对稻瘟净和恶霉灵的复配制剂进行分析 ,色谱柱 2 5 0mm× 4 6mm不锈钢柱 ,内装BDSC18填充物 ,检测波长 2 2 0nm ,流动相 :乙腈 +水 =6 0 +4 0 (v/v) ;回收率 :稻瘟净 99 5 %～ 10 0 5 % ,恶霉灵 99 3%～ 10 0 6 % ,变异系数分别为 :0 41%和 0 6 9% ,为稻 恶乳油产品的质量控制建立了准确、快速的分析方法     

大学生英语学习策略探微

针对我国大学生在英语学习策略上存在的问题进行探讨,并提出相关对策和建议,认为语言学习策略是大学英语学习的重要因素之一。     

"再听证"条款考疑

介绍了日本、韩国及我国台湾地区的行政程序法关于再次举行听证会的规定.分析了我国行政程序法试拟稿及部分地方立法中有关于再听证规定存在的问题,并提出了具体的修改意见.     

MACD与K线图技术在证券投机中的实证研究

利用MACD趋势指标与K线形态图进行相互验证技术,改进一般的基于MACD的证券买卖准则。实证结果表明,基于改进后的MACD买卖准则进行证券投机,几乎能使投机者捕捉到每一波段行情,从而获取较高收益。     

Application of open-pit and underground mining technology for residual coal of end slopes

Given the conditions of residual coal from the boundary of a flat dipping open-pit mine,which uses strip areas mining and inner dumping with slope-covering,we propose an open-pit and underground integrated mining technology for residual coal of end slopes.In the proposal a conveyance road and ventilation conveyance near the slope are built,corresponding to the pit mining area and the surface coal mine dump,as well as an interval haulage tunnel and air-inlet tunnel.The outcome shows that such mining method may reduce the effect to slope stability from underground mining,it does not affect the dumping advance and has a high recovery rate of residual coal resources.The working face is timbered by single hydraulic props,transported by a scraper conveyor and supported by coal walls.This method of mining is one of layered top coal caving,with high resource recovery,low production cost where positive economic benefit can be realized.     

浅析图书馆有色金属公共信息服务平台的建设

为了充分发挥图书馆的技术资源优势,缓解企事业单位文献信息资源不足的矛盾,我馆提出建设一个有色金属公共信息服务平台,使图书馆更好地为我市地方经济建设服务,提升图书馆的服务能力和服务水平;更好地发挥图书馆的窗口作用和纽带作用,与地方搭起一个连接的桥梁,更好地为市政府和我市各企事业单位服务。     

基于广东区域性高职院校创业教育的思考——记广州城建职业学院学生创业教育的探索

职业素质是劳动者对社会职业了解与适应能力的一种综合体现,主要包括职业修养和职业技能。在高职院校中开展创业教育是我国经济形势发展的需要,对于培养学生的实践能力、创新精神和解决学生的就业压力有着十分重要的意义。广州城建职业学院的创业教育可以从以下三方面着手：一是转变观念,营造氛围;二是传授本领,打好基础;三是开展活动,提高能力,逐步探索出一条适合广州城建职业学院特色高职学生创业教育的新路子。     

生活质量视阈下的大学生“精神贫困”测量指标研究

高校大学生＂精神贫困＂现象已引起人们重视,成为多方关注话题。本文在梳理前人研究成果基础上,对＂精神贫困＂测量指标进行研究,以获得科学的测量指标体系,为获得真实科学的一手资料打进行理论论证。