配合煤选择性粉碎工艺的应用

介绍了配和煤选择性粉碎工艺的原理、特点及应用情况。结果表明该工艺投用后，配合煤质量明显改善。     

蓝钨制取超细钨粉的研究

以蓝钨为原料,通过氢还原制取超细W粉末,研究了还原温度、装舟量和氢气流量对制取W粉粒度的影响。结果表明:在适当的工艺条件下,使用蓝钨可以制得超细钨粉。     

紫钨循环还原氧化制备亚微米钨粉新工艺的研究

通过激光粒度分析仪和电子探针扫描仪检测试验结果可得,利用紫钨连续循环三次还原,还原工艺为:一带温度640℃,二带温度760℃,三带温度860℃,当温度达到860℃时保温20 min两次氧化,氧化工艺为:钨粉在空气中缓慢地升温到500℃,当温度达到500℃时保温10 min,可以制备出粒度分布在0.11与0.95μm之间占93.68%,比表面积(BET)为1.082 m2.g-1的亚微米钨粉。     

脉冲袋式除尘技术在铜合金加工中的应用

本文介绍了低压布袋除尘技术及在铜合金生产中产生的废气治理的应用。从广州铜材厂有限公司投人运行使用至今来看，低压布袋除尘对氧化锌粉尘有良好的除尘效果，取得了明显的环境效益和社会效益，同时取得收集的粉尘外卖和相对其它方式除尘器省电20％的节能的经济效益。     

Study of incomplete transformations of near equiatomic TiNi shape memory alloys by DSC methods

The incomplete transformations of near equiatomic TiNi shape memory alloys were investigated by differential scanning calorimeter (DSC). The results showed that the incomplete transformation can induce multistage phase transformation in a sample showing R-phase transformation, when the turn back temperature located in a value between R_f and M_s, the heat flow detected upon following heating only shows one endothermic peak. With decreasing the turn back temperature to a temperature between M_s and M_f, two endothermic peaks (multistage phase transformation) can be observed upon the following heating. There were no incomplete transformation induced multistage phase transformations in a sample without R-phase transformation.     

Electrode materials for lithium secondary batteries prepared by sol-gel methods

Since the commercialization of lithium secondary batteries in the early of 1990s, their development has been rapid. Nowadays, improving the preparation technology and electrochemical performance of their electrode materials is a major focus in research and development of the materials, power sources and chemistry. Sol-gel methods are a promising way to prepare electrode materials due to their evident advantages over traditional methods, for example, homogeneous mixing at the atomic or molecular level, lower synthesis temperature, shorter heating time, better crystallinity, uniform particle distribution and smaller particle size at nanometer level. In this paper, latest progress in the preparation of electrode materials by sol-gel methods is reviewed, including cathodic ones, e.g., lithium cobalt oxides, lithium nickel oxides, spinel and layered lithium manganese oxides, vanadium oxides and ferrous phosphates, and anodic ones, e.g., tin oxides and titanium oxides. Compared with those prepared by traditional solid-state reaction, the structure stability of the prepared electrode materials and the behavior of lithium intercalation and de-intercalation are much improved. As a result, the prepared products provide better electrochemical performance including reversible capacity, cycling behavior and rate capability. In addition, sol-gel methods can be used to prepare new kinds of electrode materials such as nanowires of LiCoO₂ and nanotubes of V₂O₅, which cannot be easily created by the traditional methods. Further development and application of sol-gel methods will bring about new and better electrode materials, meaning a great promotion to lithium secondary batteries.     

巷道掘进爆破专家系统研究开发

简述了专家系统在巷道掘进爆破中的应用现状，系统地阐述了巷道掘进爆破专家系统研发的过程，通过实际工程应用来验证该系统，获得了较好效果。     

一种改进的遗传算法在系统参数辨识中的应用

文章分析了传统遗传算法存在的缺陷,以及它们产生的原因,提出了解决这些缺陷的方法.该文通过合理选择编码方式,改进初始种群选择策略、复制、交叉和变异策略得到一种综合的改进遗传算法,并将其应用于模型参数辨识.实验证明用基于排序法的新的选择算子和多个交叉、变异概率,能有效维持种群的多样性,克服算法早熟现象.在对下一代个体的选择中用到精英保留策略和模拟小生境方法,有效加快了收敛速度.同时在系统辨识的过程中,本文结合先验知识,对模型阶次的辨识进行指导,从而大大的提高了搜索速度.     

电子商务中的安全技术

随着我国加入WTO和Internet的飞速发展，电子商务已成为一个新的热点，其交易安全成为当前电子商务进程中关键性的因素。本介绍了电子商务的安全要求和使用的基本安全技术，对RSA加密技术、SET协议及混合型防火墙技术进行了分析。     

同三国道主干线粤境开阳高速公路路面下面层SUPERPAVE配合比设计

结合同三国道主干道粤境开阳高速公路K170 000-K205 400的下面层Superpave配合比设计。介绍Superpave的应用情况．