光度法快速联合测定钒铁合金中磷锰硅

改单独测定磷锰硅为联合测定磷锰硅，取得了良好的效果。由于省去分别熔解的时间，减少了操作程序，不仅提高了工作效率，而且节约电能源。     

天铁炼铁技术进步

近十年来，天铁集团炼铁厂通过改善原燃料条件；优化炉料结构，提高入炉品位；采用提高炉顶压力、富氧喷煤、低硅冶炼、炉顶气象系统等多项先进技术，使高炉各项经济技术指标逐年提高。     

Bioeffects of Low Energy Ion-Beam Implantation and Vacuum Treatment on M1 Arabidopsis Thaliana

Vacuum treatment and ion-beam bombardment are two major processes in the low energy ion-beam implantation. To accurately study the contributions of these two major factors to the bioeffects separately, the M1 generation variation of Arabidopsis thaliana with ion-beam implantation and vacuum treatment were compared through a series of key plant development parameters including morphological observation, biochemical assay and RAPD （random amplified polymorphic DNA） analysis. The results showed that ion-beam implantation had obvious effect on almost all of these parameters, and the vacuum treatment had some impacts on several morphological parameters such as the bolting time and the length of the primary stem. Taking the results together, the indication is that vacuum treatment has some slight contributions to the bioeffects of ion-beam implantation while ion-beam bombardment itself is the major creator of the bioeffects.     

硅的等离子体深腐蚀

湿法化学腐蚀已被广泛地应用于敏感器件传感结构的微细加工中.近年来,在VLSI中等离子体干法腐蚀已成为获得细线条图形的可行技术.然而,干法腐蚀工艺无论是等离子体腐蚀或反应离子腐蚀,相对于湿法腐蚀来说都是比较慢的.在需要深腐蚀的应用中(如电子束光刻的对准符号刻蚀,电路隔离槽或敏感器件的微细结构腐蚀)当前都着力提高腐蚀速率.在传感器的开发中,主要问题之一是封装,为简化到处于测量环境的传感器的外部连接,希望通过传感器背面进行连接.在化学传感器中,背面连接最为有利.因为假如所有的引线都     

无刷励磁同步电动机的并网控制

介绍了无刷励磁同步电动机实现并网控制的具体条件．同时论述了截整步控制器系统各主要环节的控制原理与检测以及该系统的调节。     

环氧树脂在电子封装及绝缘材料领域应用广阔

环氧树脂具有极其优异的品质和环境适应性，综合性能极佳，更由于它配方设计的灵活性和多样性，从而使它在电子电器领域得到广泛的应用。特别是进入21世纪以来这种增长势头进一步迅猛起来。