贵州省长顺县耕地土壤硒元素分布及其影响因素分析

在嵌入式系统下借助语音识别技术设计一套无线控制系统，通过此系统对传统家电进行一些常规的语音与界面人机交互操作，实现包括多设备交互控制、网络连接、数据显示等功能，这将极大提升家居生活的便利性和舒适性。系统采用基于高级精简指令集机器(advanced RISC machine,ARM)处理器+Linux+语音识别库+无线传感器网络的方案，主要包括硬件电路设计和软件开发，控制系统利用语音识别技术对声音进行识别，借助ZigBee模块进行主控系统与终端设备的交互。与传统产品相比，该交互式家居语音控制系统提供多样的识别、交互模式，创新的控制模式及更大范围的识别距离。

Analysis on Soil Selnium Distribution and Its Influencing Factors in Changshun County, Guizhou Province

The cultivated land quality geochemical survey shows that the selenium content of the surface soil ranged from 0.06 mg/kg to 5.68 mg/kg, with an average value of 0.64 mg/kg. Selenium geochemistry grade is medium to above in Changshun county The spatial distribution is weakly differentiated, and the high-value area is spread in north-south direction. The content of selenium in vertical soil increased with the depth. The difference of selenium content among different soil types and land use types was small. The distribution of selenium-rich soils is consistent with that of easily weathered carbonate rocks, especially the coal-bearing strata and siliceous rocks. The content of Se in soil was positively correlated with the content of V, Cr, Cu, Mo, Ni and organic matters, negatively correlated with the pH of soil, and linearly correlated with iron oxides and Si-Al oxides.