催化反应吸光光度法测定痕量银

研究了Ａｇ对亚铁氰化钾与邻菲罗啉显色反应的催化研究，建立了痕量银的催化吸光光度法。灵敏度为１．０×１０＾－３μｇ．ｍｌ＾－１，线性范围为０－０．４μｇ／２５ｍＬ。用于水样中痕量银的测定，结果满意。     

异核配合物[Co(Ⅲ)(Hdmg)2(H2O)2Mn(Ⅱ)Cl3]的合成与晶体结构

A new coordination compound Co(Ⅲ)(Hdmg)₂(H₂O)₂Mn(Ⅱ)Cl₃ was synthesized and its crystal structure was determined. The crystal data are as follows: crystal system, orthorhombic; space group, C222₁(#20); a=1.18315(3) nm, b=1.28631(5) nm, c=1.14355(2) nm, V=1.74037(9) nm³, Z=4, D_c=1.857 g·cm^-3, F(000)=980.00, μ(MoKα)=21.69 cm^-1, R₁=0.030, wR₂=0.92. The coordination geometries around Co(Ⅲ) and Mn(Ⅱ) atoms are distorted octahedral and distorted trigonal bipyramidal, respectively. The Hdmg chelates Co(Ⅲ) and bridges to two Mn(Ⅱ) atoms to form a polyheteronuclear helical structure along the c axis.     

聚碳酸酯型聚氨酯互穿网络聚合物的研究概况

简述了聚磷酸酯型聚氨酯（PCU）互穿网络聚合物（IPN）的发展及最新研究动态。介绍了其制备、表征、结构与性能的关系。预示了聚碳酸酯型聚氨酯互穿网络聚合物材料的开发前景。     

A Versatile High-speed Image Processing System Based on DSP and CPLD

In this paper, we present an optimized design method for high-speed embedded image processing system using 32 bit floating-point Digital Signal Processor （DSP） and Complex Programmable Logic Device （CPLD）. The DSP acts as the main processor of the system： executes digital image processing algorithms and operates other devices such as image sensor and CPLD. The CPLD is used to acquire images and achieve complex logic control of the whole system. Some key technologies are introduced to enhance the performance of our system. In particular, the use of DSP/BIOS tool to develop DSP applications makes our program run much more efficiently. As a result, this system can provide an excellent computing platform not only for executing complex image processing algorithms, but also for other digital signal processing or multi-channel data collection by choosing different sensors or Analog-to-Digital （A/D） converters.     

The Characteristic Finite Volume Method for Nonlinear Convection-diffusion Problems

§ 1.Introduction　 The finite elementor finite difference methods along characteristics for convection-dif-fusion problems in an unbounded domain R have been developed by Douglas and Rus-sel[1 ] .In those problems with significant convection,the solution changes much lessrapidly in the characteristicτ direction than in time tdirection.Thus,the characteristic-type numerical methods will permitthe use of largertime steps,with corresponding im-provements in efficiency,at no cost in accuracy.　…     

WPS文件与Word文件之间的相互转换

0　引言市场上出售的能够进行文字处理的应用软件有很多种 ,但我们常用的文字处理软件是ＷＰＳ和Ｗｏｒｄ。在ＷＰＳ下编辑的文件可以转换成Ｗｏｒｄ格式的文件 ,同样 ,在Ｗｏｒｄ下编辑的文件可以转换成ＷＰＳ格式的文件 ,即 :同一个文件的内容可以在ＷＰＳ和Ｗｏｒｄ之间任意转换 ,这种转换方式在各处的系统中都已提供给用户 ,大多用户对这一转换方法都已会用 ,但怎样才能更快更完整地将文件转换成相应的格式呢 ?下面简单介绍几种方法 ,供读者参考。1　ＵＣＤＯＳ支持的ＷＰＳ格式文件转换成Ｗｏｒｄ格式文件从ＵＣＤＯＳ支持的ＷＰＳ格式…     

可溶性滤膜富集-分光光度法测定水体中微量蛋白质

提出了分光光度法测定蛋白的新方法。在酸性介质中，蛋白质能和溴连苯三酚红结合成为超分子化合物，用硝化纤维素滤膜富集蛋白质－溴连苯三酚红的复合物，该体系及滤膜可溶解二酸化了二甲亚中形成稳定的有色溶液，其最大吸收波长为４２５ｎｍ。当富集倍数为５０时，本方法的检测限为７μｇ／Ｌ，蛋白质在５ｍＬ溶液中的含量为０￣３５０μｇ时符合朗伯－比尔定律。操作简单，用于样品中蛋白质的测定，结果满意。     

Al2O3-H2O纳米流体的相变蓄冷实验研究

通过在水介质中添加纳米氧化铝粒子,研制了一种新型传热冷却工质一氧化铝-水纳米流体,粒径分布显示了加入分散剂的悬浮液具有很好的分散性,同时对Al2O3-H2O纳米流体和水溶液的结冰过程进行了实时观察.结果表明,加入Al2O3纳米粒子后,流体的结冰速率得到了很大提高,结冰时间大大缩短,DSC测试结果得到0.1%Al2O3-H2O纳米流体的相变潜热值为313.1 J/g.