采用ICP-AES测定高含量锌、镉和铜,选择了最佳仪器工作条件和样品处理方法。在实验优选条件下,对铜镉渣中铜的含量为8%—12%;镉的含量为35%—38%;锌的含量为21%—23%进行了测定。回收率分别为铜99.8%—100.0%,镉98.3%—99.9%,锌99.3%—99.5%。

On the basis of ecological security theory and by using ecological footprint analysis,an applied research is carried out in Wuyishan Scenery District,which is used to measure the impact of the human activity on ecological environment and sustainable development and give quantitative evaluation.The result shows that the ecological footprint is 1.250 3 hm2 per person,ecological carrying capacity is 4.147 6 hm2 per person,and ecological occupancy rate is 0.301 5 in Wuyishan Scenery District.However,the ecological occupancy rate of grassland reaches up to 11.535 and that of waters reaches up to 5.386.The research shows that Wuyishan Scenery District is in a secure state,but the grassland and water eco-system are in the insecure state.

A method for determining zinc,copper and iron in electrolysis cadmium by FAAS was established.Under experimental conditions,characteristic mass are 0.006μg/mL/1% for copper,0.015μg/mL/1% for iron,0.003μg/mL/1% for zinc ,recovery is 97.5%—98.0% for copper,99.1%—100.2%for iron,97.4%—99.1% for zinc.

文中介绍了RFID系统及RFID读写器,论述了基于DSP技术的RFID读写器设计方法.在描述RFID系统组成的基础上,给出了读写器的软硬件设计流程.重点阐述了RFID读写器的防冲突设计.该读写器已应用于门禁系统中,实际应用结果表明其性能良好.

The applications and prospects for wavelet transform are presented.It probes deeply into the measuring ways to reactive energy based on the decomposition and reconstruction algorithm of wavelet packet.The simulation results of the measurement of reactive energy in non-stable power system are given.The results indicate that this measuring way matches the requirement for reactive power and reactive energy of current power systems.The measurement accuracy of reactive energy concerning fundamental power is up to class 1.