spectral data system 中文意思是什麼
spectral data system
解釋
光譜數據系統-
The parallel combinatorial spread spectrum provides high spectral efficiency and the data rate of the parallel combinatorial spread spectrum is higher than that of the direct sequence spread spectrum. this thesis studies on the mapping between data and spread sequence in the parallel combinatorial spread spectrum system and presents a mapping method based on the lexicographic order. the mapping method resolves the many to one mapping problem of the past method
本文研究了并行組合擴頻中數據和擴頻序列之間的映射方法，指出了已有的一種不定方程求解演算法中存在的映射不唯一問題，應用組合數學中的相關理論，將映射問題轉化為廠組合問題，提出了基於字典順序的并行組合擴頻數據映射演算法，該演算法具有普遍性，解決了原有演算法中的多一映射問題。 -
After analysis of tm / etm + data ' s advantage over the forest change detection, tasseled cap transformation, principal component analysis and normalized difference vegetation index were chosen to enhance the vegetation spectral information. expert classification system was adopted to extract the main tree species in the littoral shelter forest
在分析etm +數據在森林資源監測中的優勢的基礎上，通過纓帽變換、主成分分析和植被指數法增強植被光譜信息，結合專家分類系統對沿海防護林主要樹種進行提取。 -
In order to obtain these data, we must at first calculate apsds ( auto - power spectral density ) and cpsds ( cross - power spectral density ) of the three signals in the system
而想要得到這些核心參數，必須先分析估計出系統中三路信號的自功率譜密度和兩兩之間的互功率譜密度。 -
The data acquisition and analysis system combined with the bluetooth wireless data transmissions module, can realize different mode data acquisition on eight channels and pid control on two channels, and the data that were acquired can be processed by many kinds of processing methods just as signal pretreatment, signal trend detected, classic spectrum analysis, modern spectral estimation and self - suit signal filtering
該數據採集分析系統和藍牙數據採集模塊相結合，可以實現8路不同模式（連續模式、點檢模式等）數據採集、 2路pid控制功能，並能對採集到的數據進行多種分析系處理（信號預處理、信號趨勢檢測、經典譜分析、現代譜分析和自適應濾波等） 。 -
In the meantime, it introduces in details the main controlling functions of the controlling system, such as the collection of sampling analysis data 、 spectral analysis data composed and managed 、 real time database realize 、 caster ' s process - computer dec vax system real time communicate process and maintained and managed function of system database etc. analyzed and settled the problems of control system in debugging and producing
同時，詳細介紹了控制系統的主要控制功能，如化驗數據的採集、光譜分析數據合成管理、實時服務數據庫實現、連鑄小型機decvax系統實時通信進程以及系統數據庫的維護和管理功能等等。重點分析解決了項目實施過程中所出現的問題。 -
In the code division multiple access ( cdma ) system, the multiple access interference ( mai ) mitigation capability as well as system capacity are determined, to a great extent, by the correlation properties of spreading sequences ; while adaptive modulation and coding ( amc ) with high spectral efficiency is the key technique to obtain high speed and low symbol error rate ( ser ) performance in mobile data transmission
在碼分多址（ cdma ）系統中，擴頻序列的特性在很大程度上決定了抗多址干擾（ mai ）能力和系統容量，而高頻譜效率的自適應調制編碼（ amc ）技術則是獲得高速率和低誤碼率（ ser ）移動數據傳輸性能的關鍵因素。 -
After compared these methods, power spectral frequency band intensity, pca and linear network were choose to carry out the recognition system. finally, this paper provided software of gui as well as a group of simulink blocks to operate data and acquire results
在綜合比較各種方法后，最終選擇功率譜估計頻帶強度為分類特徵， pca用於特徵提取，線性神經網路作為分類器用於系統的實現。
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