stream function theory 中文意思是什麼
stream function theory
解釋
流函數理-
Paper aims at the theory problem of exact celerity machining design which is realized urgently in special shaped products, solves mathematics model of similar forming plastic stream, recurring to modern conformal mapping fruit, builds die mathematics model and optimized function equation of arc square product in precision extruding / drawing, establishes theory model for precision celerity shaped die of cad / cam integrative constitution
摘要本文針對亟待實現的擠壓（拔制）異型材模具精密快速加工設計理論課題，藉助于近代共形映射理論研究成果，求解了異型材擠壓（拔制）模具相似成形塑性流動的數學模型，建立了圓角方型材精密擠壓（拔制）模具模腔數學模型及其優化函數方程，建立了為實現模腔精密快速的cad / cam一體化的理論模型。 -
Stream function theory
流函數理 -
Using the theories of probability, algebra and number theory comprehensively, we investigate a class of boolean functions with three - valued walsh spectrum in the first part of this dissertation : the properties of the extended semi - bent functions, which are constructed from any two bent functions, are studied, followed by the structure characteristics of the boolean functions satisfying propagation criterion with respect to all but two vectors ; the definition and cryptographic properties of k - order quasi - bent functions are proposed whose walsh spectrum takes on only three values. some sufficient and necessary conditions are offered to decide whether a boolean function is a k - order quasi - bent function ; a special method is presented to construct the k - order quasi - bent functions, whose cryptographic properties are explored by the matrix method, which is different from the method of walsh spectrum and that of autocorrelation of boolean functions ; the application of this kind of boolean functions in the fields of stream cipher, communications and block ciphers is discussed, which shows the great importance of the fc - order quasi - bent functions ; some methodology are proposed to construct the k - order quasi - bent functions, including the complete construction by using the characteristic matrices of boolean functions, and the recursive method by two known k - order quasi - bent functions we further extend our investigation to the ring zp, where p is a prime, and the similar results are presented as far as the p - valued quasi - generalized - bent functions are considered
本文首先綜合運用概率論、代數學、數論等基礎學科的理論知識，並以頻譜理論作為主要研究工具，對一類譜值分佈相對均勻的函數? ?廣半bent函數、 k階擬bent函數和p值k階擬廣義bent函數進行了系統、深入的研究，給出了廣半bent函數定義，並探討了廣半bent函數的密碼學性質；給出了k階擬bent函數和p值k階擬廣義bent函數的定義及等價判別條件；討論了k階擬bent函數和p值k階擬廣義bent函數與部分bent函數和p值廣義部分bent函數的關系，探討了它們的密碼學性質；給出了k階擬bent函數和p值k階擬廣義bent函數的典型構造方法，並將對k階擬bent函數的密碼性質的研究轉化到對一類特殊的矩陣的研究上；利用布爾函數的特徵矩陣原則上給出了k階擬bent函數的一種完全構造方法，還給出了從已有的p值k階擬廣義bent函數出發，遞歸構造變元個數更多的p值k階擬廣義bent函數的方法；初步探討了k階擬bent函數在序列密碼、分組密碼以及通信中的應用；給出了一類布爾函數walsh譜的分解式，並利用這類布爾函數的walsh譜分解式給出了一類近似穩定的布爾函數的構造，特殊情形下為k階擬bent函數；利用代數數論的知識考察了p值k階擬廣義bent函數的譜特徵，並給出了k階擬廣義bent函數與所有仿射函數的符合率特徵等等。 -
In this thesis, we would present theory research and its implementation about mpeg - 2 ts stream “ health ” check analyzer. a brief narration about the background of our research and its mean would be put in the beginning. and then we would analyze structure of ts stream and its definition in iso / iec 13818 - 1, data structure of system layer and mechanism of decode would be stressed in this section, later, we would introduce principles and methods of mal - function check in mpeg - 2 ts network, parameters being presented by etsi tr 101 290 would be emphasized in this part
本文將對mpeg - 2ts碼流「健康」檢測儀的理論研究和數字電路設計作出如下介紹:本課題研究的時代背景及研究現狀和意義; mpeg - 2ts碼流的數據結構，在iso / iec13818 - 1中的定義和描述，其系統層的數據結構及解碼機理; mpeg - 2ts碼流在網路中故障檢測的原理和方法， etsitr101290規定檢測參數分類; mpeg - 2ts碼流「健康」檢測儀實現的總體方案，基於fpga的數字邏輯電路實現方案總體模塊劃分，模塊劃分的依據，模塊實現功能;總體方案的具體實現，幾個重要參數如pcr間隔及精度檢測，快速crc檢測等的實現;設計實現的驗證方法，典型參數檢測實現的驗證模型及驗證結果。
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