datum transformation 中文意思是什麼

datum transformation 解釋
基準變換
  • datum : n. （pl. data ） 〈拉丁語〉1. 〈常 pl. 〉 數據，資料。2. 論據，作為論據的事實。3. 【數學】已知數。4. 【測】基點，基線，基面。
  • transformation : n 轉變，變化；變形；【生物學】（尤指昆蟲的）轉化，變態，改造，改革；變質；【數學】變換；【電學】...
  1. Construct the data analysis software by matlab and vbmatrix to deal with test datum. it has the follow functions such as scale transformation, digital filter ; synthesize channel - data and print etc. then access the crash test result by the regulation of fmv208, including head injury, thorax injury and knee injury

    藉助matlab和vbmatrix建立的數據分析平臺對測量數據進行分析，其功能包括標度變換、數字濾波、通道數據的合成分析、傷害指標的評價、數據的保存和列印等功能。
  2. One is to use fourier transformation to convert the source signal from time domain to frequency domain and to discard high frequency harmonious components upwards of 19 ( gb / t14953 - 93 d5. 3 demanding ), then to have static huffman coding to the quantized char array which is composed of reserved direct current component and basic wave and each high frequency " s amplitudes and angles. the other is to use discrete wavelet transformation to convert the source signal from time domain to frequency domain and to set the high frequency coefficients that its absolute value is smaller than the given threshold to zero, then to have dynamic huffman coding to the quantized char array which is composed of multiple, wavelet ' s level, datum length, low frequency coefficients and reserved high frequency coefficients. mass simulinks and analyses under the two circumstances have done to show that data compression ratio is small and the relative error is also small and within the permission of engineering and the compression problem can be solved in theory of measured datum of power system

    第一種情況的壓縮方法為：採用傳統的傅立葉變換把原始信號從時間域變換到頻率域，舍棄20次及其以上的高次諧波成分（保證了gb / t14953 ? 93d5 . 3要求） ，然後對保留的直流分量、基波和各次諧波的幅值和相角數據量化后和量化時分別乘以的倍數系數構成一個數組，以字元形式保存，採用靜態huffman編碼對變換數據進行壓縮；採用離散小波變換把原始信號從時間域變換到頻率域，然後對分解得到的高頻系數進行閾值量化處理，對乘以的倍數系數、小波變換的階數、小波變換后的低頻、各級高頻以及原始數據長度、量化后的低頻系數以及保留的高頻系數大小、位置構成一個數組，以字元形式保存，採用動態huffman編碼對這個文件進行壓縮。
  3. During conversion, the conversion models determined by datum transformation and errors from the gps computation by incorrect coordinates of the reference station under wgs - 84 datum will surely have influence on datum transformation

    進行坐標轉換時，由基準轉換確定的轉換模型和參考站不是wgs - 84基準下的正確坐標所致的gps計算誤差，必將對基準轉換產生影響。
  4. A simplified model of three dimensional - datum transformation adapted to big rotation angle

    適用於大旋轉角的三維基準轉換的一種簡便模型
  5. The combined method of datum transformation between different coordinate systems

    不同坐標系綜合變換法
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