置換循環碼 的英文怎麼說

中文拼音 [zhìhuànxúnhuánmǎ]
置換循環碼 英文
permuted cyclic code
  • 置 : 動詞1. （擱; 放） place; put; lay 2. （設立; 布置） set up; establish; arrange; fix up 3. （購置） buy; purchase
  • 換 : 動詞1. （給人東西同時從他那裡取得別的東西） exchange; barter; trade 2. （變換; 更換） change 3. （兌換） exchange; cash
  • 循 : 循動詞（遵守; 依照; 沿襲） follow; abide by
  • 環 : Ⅰ名詞1 （環子） ring; hoop 2 （環節） link 3 （姓氏） a surname Ⅱ動詞（圍繞） surround; encircle;...
  • 碼 : Ⅰ名詞（表示數目的符號或用具） a sign or object indicating number; code Ⅱ量詞1 （指一件事或一類的...
  • 置換 : displace; substitute; supersede; substitution; replacement; permutation; transposition; transposi...
  • 循環 : circulate; circle; round; repeat; loop; period; recurrence; cycling; circulating; mixing; circula...
  1. As to cyclic codes over finite chain rings, we study their stucture and develop the fourier transform method to finite chain rings. the permutation groups of cyclic codes and their extended codes are investigated using their mattson - solomn polynomials

    對于有限鏈環上的循環碼，我們研究了它們的結構，並把傅立葉變換的方法推廣到有限鏈環，用循環碼的mattson - solomn多項式對循環碼及其擴展碼的置換群進行了研究。
  2. At first we improve the methods of iris image preprocessing, including an efficient arithmetic of evaluation iris images, an improving method of locating iris, calibrating iris image by the translation of coordinate and the circular shift of code, a eatimate of the background illumination by bicubic spline, and the image enhancement by the dual tree complex wavelet transform. next we designed the recognition arithmetic based on the location of the local maxima of the wavelet transform modulus. in the thesis lots of simulation are performed by means of matlab and visual c + +

    首先改進了虹膜預處理方法，實現了一種快速高效的虹膜質量評價演算法;設計了一種改進的兩步虹膜定位演算法，準確的定位了虹膜的內外邊界;利用坐標轉換和編碼的循環移位實現了對虹膜圖像的配準;利用雙三次樣條函數擬合虹膜圖像背景，去除了非均勻光照對虹膜識別的影響;使用二分樹復數小波方法增強了虹膜圖像的對比度;在識別演算法方面，本文設計了一種「基於小波模極值點位置的虹膜識別演算法」 。
  3. At the same time, a novel approach to construction of ldpc codes based on the permutation matrix was proposed which got a parity check matrix with the shortest girth is 6. these codes keep the advantage of linear encoding and become more flexible. simulations show that the performance of short length codes of this kind is as excellent as other ldpc codes

    同時提出一種基於置換陣循環移位的構造方法，得到的校驗矩陣圍長至少為6 ，且保持編碼的線性復雜度，碼率靈活，模擬結果驗證了置換陣ldpc碼碼長較短時，在高斯通道下性能接近或超過現有其他構造方式的ldpc碼。
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