PDF《农牧业信息化专题》

open mesh fabric sieves traversing an opening in the housing;

and at least one ion sensitive film layer on the mesh fabric sieves. 来源:美国专利局 发布日期:2018-01-09 全文链接:http://agri.ckcest.cn/ass/224a194c-efb0-4cfd-b5f8-9d9e94bd29dc.pdf 学术文献 1.Measurements and analysis of water content in winter wheat leaf based on terahertz spectroscopy(基于太赫兹光谱的冬小麦叶片含水 量测定与分析) 简介: Wheat is a major grain crop in China. Water is one of the most important factors which influence the lifecycle and yield of wheat. It is of great significance to study the water content at the key stages of wheat growth in order to make irrigation decision to raise its yield. As Terahertz (THz) spectroscopy is a brand new sensing technology and sensitive to water absorption, the relationship between terahertz spectra and water content in winter wheat leaf was investigated and a preliminary result was presented in this paper. Forty winter wheat leaves samples with diverse range of water content (42.8%-72.5%) were collected. The Terahertz time domain spectra (THz-TDS) were first obtained and then transformed into Frequency-domain amplitude with the Fast Fourier Transformation (FFT) method. The absorption and refractive index spectra were then calculated. The spectra were linearly fitted to obtain the slope and intercept used for building a calibration model. The partial least squares (PLS) method and linear regression were employed to establish models to determine leaf water content in the winter wheat. The predicted correlation coefficient and the root mean square error of the optimal model established with the Frequency-domain amplitude parameter at 0.3 THz by linear regression were 0.812% and 4.4%, respectively. The results showed that terahertz spectroscopy performed well in water content prediction and could be an effective and potential method for leaf water content measurement in winter wheat. 来源:International Journal of Agricultural and Biological Engineering 发布日期:2018-02-17 全文链接:http://agri.ckcest.cn/ass/244d97a8-35fd-4028-b0c6-685a603e1cfa.pdf 2.Preparation of electrochemically treated nanoporous pencil-graphite electrodes for the simultaneous determination of Pb and Cd in water samples(制备经电化学处理的纳米多孔石墨电极, 同时测定水样中的铅和镉) 简介:A simple and rapid analytical method of determining Pb2+ and Cd2+ in water samples using an electrochemically pretreated pencil-graphite electrode (EP-PGE) is proposed for the first time in the literature. An electrochemically pretreated pencil-graphite electrode was prepared by performing potential cycling between -0.3 V and 2.0 V in 0.1 mol L-1 H3PO4 solution to improve its ability to electrochemically sense Pb2+ and Cd2+ ions. Square-wave anodic strippi........