例句與造句

1. 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：采用傳統(tǒng)的傅立葉變換把原始信號(hào)從時(shí)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)，然后對(duì)保留的直流分量、基波和各次諧波的幅值和相角數(shù)據(jù)量化后和量化時(shí)分別乘以的倍數(shù)系數(shù)構(gòu)成一個(gè)數(shù)組，以字符形式保存，采用靜態(tài)huffman編碼對(duì)變換數(shù)據(jù)進(jìn)行壓縮；采用離散小波變換把原始信號(hào)從時(shí)間域變換到頻率域，然后對(duì)分解得到的高頻系數(shù)進(jìn)行閾值量化處理，對(duì)乘以的倍數(shù)系數(shù)、小波變換的階數(shù)、小波變換后的低頻、各級(jí)高頻以及原始數(shù)據(jù)長(zhǎng)度、量化后的低頻系數(shù)以及保留的高頻系數(shù)大小、位置構(gòu)成一個(gè)數(shù)組，以字符形式保存，采用動(dòng)態(tài)huffman編碼對(duì)這個(gè)文件進(jìn)行壓縮。
2. It's difficult to find data compression ratio in a sentence. 用data compression ratio造句挺難的