阿拉丁重构在华业务

重新认识中国市场时隔1个月以后,阿拉丁知识系统有限公司创始人、总裁、首席执行官Yanki Margalit携带几位高级助手再次踏上了中国的土地,Yanki Margalit一行2005年6月初在北京嘉里中心举办酒会,面对到会的国内诸位嘉宾和媒体记者,Yanki Margalit 筹躇满志地宣称,阿拉丁将总结以往的经验,以新的姿态重构在华业务。     

Preparation of BaMgAl10O17∶Eu2+ and Its Phase Behavior in Microemulsion System

BaMgAl10O17∶Eu2 (BAM) was prepared in the microemulsion system and its phase behavior was studied. There exists a small region in the reverse microemulsion system where the dispersed particles are of spherical form. In this way, BAM blue phosphor with good dispersion can be synthesized. The microemulsion phase diagrams of the pseudo-ternary system (Triton X-100/cosurfactant-oil-BAM brine) were first established intuitively by the dilution method. The microstructure of microemulsions was determined through eyeballing, conductance technique, and polar optical microscopy. Its phase behavior is affected by various factors, such as temperature (room temperature, 30, 40 ℃), oil, surfactants, and cosurfactants in microemulsions. According to the phase diagrams, the microemulsion system of Triton X-100/1-hexanol-hexane-BAM brine was chosen to prepare the precursor. The BAM phosphor can be obtained via sintering the precursor at a comparatively low temperature. The phosphors were characterized by XRD and vacuum ultraviolet (VUV) spectra.     

Synthesis of TiO<Subscript>2</Subscript> Hybrid Molecular Imprinted Polymer for Ethofumesate Linked by Silane Coupling Agent

TiO₂ hybrid molecular imprinted polymer (MIP) for ethofumesate using methacrylic acid (MAA) as the functional monomer and silane coupling agent 3-(trimethoxysilyl) propylmethacrylate (KH570) as organic–inorganic connective bridge was synthesized via photo-excitation method. Hydrogen bond was proved to act between MAA and ethofumesate for pre- and post-polymerization binding properties as testified by UV spectrometric method. KH570 modified TiO₂ nanoparticles were prepared via sonochemical reaction, which can accelerate hydrolysis, increase collision chance for the reactive system and improve the dispersion of the nanoparticles. Scanning electron microscope (SEM), transmission electron microscope (TEM), binding and the adsorption kinetics experiments as well as thermogravimetric analysis (TGA) were employed for characterization. The results indicated that the hybrid MIP revealed a larger surface area and more ordered imprinting cavities with improved thermal stability compared to organic-only MIP. Furthermore, faster adsorption kinetics and enhancive adsorption capacity were achieved, which made it promising in chemical sensor applications.     

大浪淘沙——记北新集团的战略转型

企业成功的道路有许多条,成功的模式有很多种,但成功的企业都走出了一条适合自己企业的发展道路。北新集团亦是如此。多年来,面对风云变幻的市场环境,北新集团立足现实,着眼未来,兼顾历史,在坚持企业发展愿景和整体价值观的基础上,审时度势,精准出击,以无比的气魄完成了一次次堪称完美的战略转型,走出了一条虽有波折但却辉煌的发展道路。古人云:以史为鉴,可以知兴替。今天,在我们回眸北新20多年的发展历程时,除了自豪并骄傲于她的光荣外,我们更愿意从更大的时空范围,理性的眼光来审视北新历次成功转型背后的深刻原因和基本支撑,从中汲取智慧。     

基于DTW算法的语音识别系统实现

动态时间归整(DTW)算法的实现简单有效,在孤立词语音识别系统中得到了广泛的应用.介绍了将DTW算法移植到TMS320VC5402上实现孤立词语音识别的原理、系统硬件组成和软件设计.研究结果表明,系统能满足实时性能要求,识别效果良好.     

国产螺旋槽密封在进口压缩机上的应用

介绍了国产螺旋槽密封在进口压缩机上的应用，分析了原进口机械-浮环组合密封的失效原因，叙述了改造后国产浮环螺旋槽组合密封的结构和特点。     

电子束、离子束与蓝宝石相互作用的研究

研究了电子束、离子束作用于Al2O3表面时成分的变化，表明无论电子束或离子束都能使Al2O3发生分解，产生导电的元素Al。实验在PHI610·SAM上进行，电子束轰击下（3keV，O．5μA，入射角60°）10s就有元素Al分解出来，2min以后就达到饱和，分解析出量随时间成a（1－e－bt）的关系。离子束轰击下同样发生元素Al的分解，但当Ei＞3keV时，由于剥离速率加大，溅射5min时表面Al峰反而比1min时要弱。这时表面Al含量处于分解析出与溅射剥离的动态平衡中。实验还发现了Al2O3的解析与表面成分有关（如碳的含量）。最后讨论电子束与离子束的解析机理。     

求作相贯线的极值点

用解析法分析可得出：当球面和锥面相交且轴线平行于同一投影面时，相贯线的正面（在V面）投影是抛物线．抛物线的极值点处在一定的几何位置上．     

超滤装置自动控制系统的研制

本文介绍了一种用于纯水制备的超滤装置的自动控制系统，该系统在设备在日常操作，超滤膜的清洗等方面不仅大大减少工作强度，提高了工作效率，而且延长了超滤器件的使用寿命，取得较好的经济效益。