field spectral information 中文意思是什麼
field spectral information
解釋
野外光譜資料- field : n 菲爾德〈姓氏〉。n 1 原野，曠野；（海、空、冰雪等的）茫茫一片。2 田地，牧場；割草場；〈pl 〉〈集...
- spectral : adj. 1. 鬼的；鬼怪（似）的。2. 【物理學】光譜的。
- information : n. 1. 通知，通報，報告。2. 報導，消息，情報。3. 資料，知識，學識。4. 【自動化】信息，數據。5. 【法律】起訴，告發。adj. -al
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Ds signal is twice modulated with the rapid pseudorandom noise sequence and the carrier. so it appears cyclostationary. in the field of spectral correlation, ds signals appears its characteristic as fallows : for the amplitude of spectral correlation, the information of carrier frequency and pn code rate are contained on the spectrum frequency equal to zero sheet, and also the pn code rate is contained on the sheet of spectrum frequency equal to carrier frequency ; for the phase of spectral correlation, the information of carrier initial phase is contained on the sheet of cyclic frequency equal to double carrier frequency
Ds信號是經過高速偽隨機序列和正弦載波二次調制的寬帶信號，因此具有周期平穩特性，它在譜相關域表現為:幅頻特性在譜頻率等於零截面切片上包含了載頻和偽碼速率信息特徵，在譜頻率等於載頻截面切片上包含了偽碼速率信息特徵;相頻特性在循環頻率等於兩倍載頻截面切片上包含了載波初相信息特徵。 -
Analyzing spectral features of field measurements and landsat tm image, the best time of cotton identification using remote sensing is confirmed. and a spectral information based cotton discrimination model using landsat tm image on a large scale was developed. the model is simple, more accurate and suitable for operational work which was evaluated by mathematics analysis and field experiment
通過對各時期棉花及主要農作物的地面測量光譜與tm圖像光譜特徵的差異性及規律性分析，確定試驗區棉花識別的最佳時相為9月；通過對最佳時相的tn圖像中各種農作物光譜特徵的分析研究，建立了大尺度的棉花遙感識別模型。 -
2 ) spectral information based cotton discrimination model using landsat tm image cotton and other crops " spectral information were collected during cotton growth season in a field work in northern xinjing
2 ）基於光譜信息的棉花識別模型的研究為提高大尺度的遙感監測中棉花識別精度與圖像的解譯速度，探索研究了一種tm影像的棉花識別模型。
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