铜仁“油茶通”数据平台的构建与应用

针对铜仁市油茶产业发展中存在的问题,构建基于物联网和数据展示的应用平台——油茶通。系统应用物联网技术采集数据,对铜仁地区油茶种植、宣传等各种情况进行数据化管理,构建了油茶交易信息发布平台、油茶宣传管理平台、基于人工在线咨询与离线智能交流的油茶咨询交流平台。上述平台基于构建的铜仁油茶通微信公众号、微信小程序、PC端和移动端官网等应用,对铜仁地区的油茶产业信息化产生积极的影响。

Research of Up - conversion Luminescent Properties of Tm^3＋ - Yb^3＋ Co - doped Y2Ti2O7 Powdersby Sol - gel Method

The 1 mol% Tin^3＋, 1 mol% Tm^3＋ and 10 tool% Yb^3＋ co -doped Y2Ti2O7 powders were prepared by sol- gel method. The Tm^3＋ doped Y2Ti2O7 was composed of mixture of Y2Ti2O7 and tiny TiO2 phases. Yb^3＋ co - doping had no effect on the phase structure of Tm^3＋ doped Y2Ti2O7. The blue and infrared up -conversion emissions in the wavelength range of 430 - 500 nm and 620 - 750 nm were detected by a 980 - nm semiconductor laser diode （LD） excitation, which corresponding to the ^1G4→^3H6 and ^3H4→^3H6 transitions of Tm^3＋. The up -conversion emissions intensity of Tm^3＋ doped Y2Ti2O7 powders was enhanced by Yb^3＋ co -doping. The up -conversion emissions intensity of Tm^3＋ -Yb^3＋ co -doped Y2Ti2O7 increased gradually with increasing the excitation voltage of LD. The two step process was observed for the up - conversion emission intensity with increasing the excitation power of LD. The up - conversion emissions intensity of Tm^3＋ -Yb^3＋ co- doped Y2Ti2O7 was decreased with increasing the temperature, which caused by the increase of rate of nonradiative relaxation rate with temperature.