例句與造句

1. the system has been established based on the upper thoughts . it has been applied in some military mapping projects to revise maps
   該軟件已經(jīng)作為全軍1：5萬(wàn)基礎(chǔ)地理信息庫(kù)的數(shù)據(jù)獲取軟件在全軍各測(cè)繪大隊(duì)推廣使用。
2. turbo codes represent the new code structures, which consist of pccc ( parallel serially convolutional code ) and sccc ( serially concatenated convolutional code ) . in this paper, the background of turbo codes are firstly introduced, which includes the base principle of error correction code 、 block code and convolutional code; the principle of turbo code and the iterative decoding is secondly expanded; the key decoding algorithm : a revised map algorithm and iterative decoding theory are detailed; then, a new turbo code structure : hccc ( hybrid concatenated convolutional code ) is presented, and the capacity of this code method is analyzed, the average capacity upper bound is derived; at last, this code is simulated on awgn ( additive white gaussian noise ) channel and rayleigh fading channel
   本文首先介紹了turbo碼的背景知識(shí)，包括差錯(cuò)控制的基本原理、分組碼和卷積碼；然后闡述了turbo碼的基本原理，包括turbo編譯碼器結(jié)構(gòu)及迭代譯碼原理；較為詳細(xì)地描述了關(guān)鍵的譯碼算法：?種改進(jìn)的最大后驗(yàn)概率(map)譯碼算法及迭代譯碼算法；提出了一種新的turbo碼結(jié)構(gòu)：混合turbo碼(混合級(jí)聯(lián)卷積碼)；并用編碼性能聯(lián)合界分析方法對(duì)混合turbo碼進(jìn)行了性能分析，得出了其平均性能上界；并在高斯白噪聲信道和瑞利衰落信道上分別作了一些應(yīng)用研究及計(jì)算機(jī)仿真實(shí)驗(yàn)。
3. It's difficult to find revised map in a sentence. 用revised map造句挺難的