零序列 的英文怎麼說

中文拼音 [língxùliè]
零序列 英文
nil sequence
  • 零 : Ⅰ數詞1 （零數） zero2 （數的空位） zero sign （0）; nought 3 （表示沒有數量;無） nil; nought 4 （...
  • 列 : Ⅰ動1 （排列） arrange; form a line; line up 2 （安排到某類事物之中） list; enter in a list Ⅱ名詞1...
  1. Disigning coolant channel on the firebox of liquid rocket engine to loxodrome ( equal - angle helix ) groove can improve firebox coolant capability greatly. because the width dimension of loxodrome groove is narrow and the depth is deep, some machining methods are incapable, such as end - milling or electrochemistry. according to the peculiarities, a cnc disk - cutter - milling method which is composed of five motion axes with four simultaneously interpolated ones is researched. because most firebox generatrix is composed of complex curves, it is very difficult to get cnc cutting program with manual means. in order to deal with the problem, the loxodrome mathematics model is studied, and an auto - programming software system is developed. the software system can generate cnc cutting program of loxodrome on many kinds of turned surface. the constriction - distension segment of firebox is the most representative workpiece. the sharp changing of its generatrix slope makes loxodrome milling difficult. with the theory analyzing and practice cutting experiment, some applied techniques, which include milling mode and direction, choosing cutter diameter and cutting start point setting, are developed. adopting the technology above, tens regular workpiece have been manufacturing. the two - year manufacture practice has confirmed the validity and feasibility of developed loxodrome coolant channel milling method. the developed technology is also worth to be referenced to other similar workpiece

    將液體火箭發動機燃燒室的冷卻通道設計為斜航線（等傾角螺旋線）槽形，可以大幅度改善燃燒室的冷卻性能.斜航線冷卻槽的槽寬尺寸較小而槽深尺寸較大，所以無法使用棒銑刀銑削、電化學等加工方式.針對這些特點，提出了五軸控制、四軸聯動的數控片銑刀銑削加工方法.由於燃燒室外表面的母線輪廓復雜，手工編制數控加工程序難度大.為了解決數控加工程序的編制問題，研究了斜航線的數學模型，開發了自動編程軟體系統.使用該系統，可以生成多種母線輪廓回轉體外表面上的斜航線數控加工程序.燃燒室收斂-擴張段的母線斜率變化大，加工難度大，是斜航線冷卻通道加工的最典型工件.經過理論分析和實際切削實驗，研究了針對該類型工件的片銑刀直徑選擇、銑削方式和方向、刀具調整和起刀點的設置等多項實際的加工方案.採用上述的一系列技術，已經成功地加工了數十個合格工件.經過兩年多的實際生產過程應用，驗證了所開發的斜航線冷卻通道加工方法的正確性和可行性.這些加工技術的研製成功，對其他相似類型零件的加工亦具有參考意義
  2. Fills an array of bytes with a cryptographically strong sequence of random nonzero values

    用經過加密的強隨機非零值序列填充位元組數組。
  3. The assembly sequence planning method is presented, where the assembly information model is established with the polychromatic sets, and the assembly constrains relations are divided into three kinds, locating relation, obstructing - disassembly relation, and junction relation, to form an assembly - constrains - relation matrix, and to present assembly planning sequences generation algorithm

    摘要在新的裝配序列規劃方法中，採用多色集合建立了裝配信息模型，把裝配約束關系分為定位關系、阻礙拆卸關系和聯接關系，建立了裝配約束關系方程定位方程、阻礙拆卸方程和聯接關系方程，用數學方程表示零件的裝配約束條件，同時提出了求取零件裝配序列的演算法。
  4. Thirdly, the thesis focused on the organization of inner space, pointed out two awful aspects : space without shape and character, space sequence without continuity and rhythm

    一是單個的歷史場所景觀要素零散、缺乏景觀特徵，二是場所之間缺乏協調聯系、景區缺乏空間序列確立的整體結構。
  5. Many approaches developed offer approximation solutions, including principle - based, such as purely syntactic ones, semantic and pragmatic ones, and statistics - based ones. in this paper, we put forward a modal to resolve anaphora ( including empty pronoun ) based on the characteristics of chinese. in this method, we apply some corresponding rules on the sentences after their patterns distinguished in the text, then analyze the semantic relation of the components of the sentence and form a corresponding semantic network, get rid of some candidates according to the co - constrain of the nodes in that network, put every component which refers to people into forward - looking centers, ordered by their semantic role, ascertain the hierarchy of sentences, analyze the transition types resulted by the scheme of different resolutions, finally, choice the most possible scheme of resolution according to the precedence of the types

    本文針對漢語的特點建立了一個包括零代詞在內的代詞消解模型:在語義結構文法思想的指導下，對文本中的句子模式識別后，採用相應的規則式，然後分析句中成分之間的表層語義條件並產生相應的語義網路，利用語義網路中結點間的相互約束對代詞的某些候選先行詞進行排除，並且把每句中指人的語言成分放到前向中心列表中，以它們所充當的語義成分為排序依據，確定句子的層次結構，最後依據中心理論分析每個候選先行詞對代詞的不同消解所造成的層次相鄰的句子之間的過渡類型，利用過渡類型的優先順序對代詞的候選先行詞進行擇優。
  6. Case zero or more is straightforward, represented by standard homogeneous sequences : lists, arrays, vectors, or whatever the language calls them and provides

    情況（零次或多次）很簡單，可以由標準（同類）序列表示：列表、數組、向量或編程語言所稱呼和提供的任何東西。
  7. In this paper it is proved that there are no scramble sets with nonzero invariant probability measure and especially there are no sequence - distribution - scramble sets with nonzero invariant probability measure in the minimal mappings of a compace metric space and interval mappings with zero topological entropy

    摘要證明緊度量空間的極小映射以及拓撲熵為零的區間映射不存在具有非零不變概率測度的混沌子集，特別不存在具有非零不變概率測度的序列分佈混沌子集。
  8. Through the study and analysis conclude as follows : in human dna sequences, if the distinction of the number of the four bases is very small, they can distribute in a sphere whose radius equal to 1 / 4 ; if the distinction of them is comparative large, they can distribute between the sphere and the frustum - octahedron ; if one is 0 in them, they can distribute between the frustum - octahedron and regular - octahedron ; if the distinction of them is especial large, they may distribute in the outer of the regular - octahedron

    通過研究和分析得到結論為：在人類dna序列中，如果四個堿基的數目相差很小時，它們可能分佈在半徑為1 / 4的球內；如果相差比較大時，它們可能分佈在這個球和截角八面體之間；如果在四個堿基數目中有一個為零時，那麼它們有可能分佈在截角八面體和正八面體之間；如果相差的特別大，甚至有可能落在那個正八面體的外部。
  9. Then based on it an audio encryption algorithm is proposed by adopting module operation, which has nice encryption characters in the simulation. another audio encryption algorithm based on zero dynamical nonlinear invertible system is studied and improved. in order to compare the encrypiton characters between the improved and the original algorithm, their applications to audio encryption are simulated, and the corresponding results are shown in chapter 3

    本文的主要成果有:提出了一種混沌實值序列的生成方法，並在此基礎上引入模變換對語音信號進行加密，經實驗模擬可以得到良好的加密效果;對零動態可逆混沌語音加密通用模型的一個具體加密演算法進行了改進，並通過模擬實驗比較了改進前後演算法的加密性能。
  10. First, we give a polynomial series and study its minimum positive zero points, from this, the theorem of delay differential equations with both positive arguments and constant coefficient is obtained, this theorem is more explicit and practicable

    1具有正時滯的微分方程解的零點分佈為了證明方便，歸納定義多項式序列如下：記多項式_ i （ s ）的最小正根為b _ i 。定理1
  11. The author makes a stabilized and zero mean treatment of the statistic data on the per capita annual net income of henan farmers between 1978 and 2005, and using the property of the autocorrelation function and partial autocorrelation function of time sequence, establishes the model appropriate for the data

    摘要筆者根據河南省1978年2005年的農民人均純收入統計數據，將這些數據進行平穩化、零均值化處理，並利用時間序列的自相關函數，偏自相關函數的性質，確認數據所適合的模型。
  12. Ds signal is twice modulated with the rapid pseudorandom noise sequence and the carrier. so it appears cyclostationary. in the field of spectral correlation, ds signals appears its characteristic as fallows : for the amplitude of spectral correlation, the information of carrier frequency and pn code rate are contained on the spectrum frequency equal to zero sheet, and also the pn code rate is contained on the sheet of spectrum frequency equal to carrier frequency ; for the phase of spectral correlation, the information of carrier initial phase is contained on the sheet of cyclic frequency equal to double carrier frequency

    Ds信號是經過高速偽隨機序列和正弦載波二次調制的寬帶信號，因此具有周期平穩特性，它在譜相關域表現為:幅頻特性在譜頻率等於零截面切片上包含了載頻和偽碼速率信息特徵，在譜頻率等於載頻截面切片上包含了偽碼速率信息特徵;相頻特性在循環頻率等於兩倍載頻截面切片上包含了載波初相信息特徵。
  13. Results obtained demonstrate that, due to the existence of zero - correlation - zone ( zcz ) of the go sequences, near ideal performance can still be achieved even when high speed radio environment is encountered. in addition, obvious interference mitigation as well as significant performance improvement can still be observed when the relative shifts of spreading sequences exceed zcz

    研究表明，由於廣義正交序列零相關區（ zcz ）的存在，即使處于高速運動無線環境，仍然可以取得近似理想性能，即使序列偏移超出了零相關區，仍然對干擾有明顯的抑制作用，顯著提高系統性能。
  14. In this thesis, the zero correlation zone ( zcz ) or generalized orthogonal ( go ) sequences are applied to direct - sequence cdma ( ds - cdma ) systems, and the corresponding system performance are analysed. topics on the correlation property analysis of hadamard walsh ( wh ) sequences, go sequences, and loosely synchronous ( ls ) sequences are performed, and the system model and performance evaluation of single - cell and multi - cell synchronous cdma ( s - cdma ) systems employing go sequences, and the applications of go sequences in quasi - synchronous cdma ( qs - cdma ) systems are elaborated

    本文研究了零相關區（ zcz ）或廣義正交（ go ）序列在直接序列碼分多址（ ds - cdma ）系統中的應用並給出了系統性能分析結果，包括hadamardwalsh （ wh ）序列集、廣義正交序列集與鬆散同步（ ls ）序列集相關特性分析，採用廣義正交序列的單小區與多小區同步cdma （ s - cdma ）系統模型與性能分析，以及廣義正交序列在準同步cdma （ qs - cdma ）系統中的應用等問題。
  15. A specific modular of assembly sequence planning ( asp ) is developed. it is based on subassemblies partition and assembly engineering semantics. in this way, the asp of integral stamping die is translated into asp of every subassembly and asp among subassemblies, and some problems existed conventional methods can be avoided

    提出了一種基於子裝配體劃分和沖模結構知識的裝配序列規劃方法，這種方法主要依據沖模構成零部件的幾何約束信息和沖模結構知識對裝配設計產生的模型進行子裝配體識別和劃分，將整個模具的裝配序列規劃問題分解為若干子裝配體內部及子裝配體之間的序列規劃。
  16. Next, the lower and upper bound expressions are evaluated, insofar they are present ; defaults are zero and the sequence ' s length

    下一步，在它們所出現的范圍內，對上下限表達式求值；預設值是零和序列長度。
  17. Today, mechanic product structure has become more complex, competition being more fury and the needs for machine product being more rigorous. the development of optimization has stepped into whole machine even to a serial of product from part optimization, which has made it difficult to build a model and to resolve the model by use of traditional optimization method. a new design method is being wanted

    當今機械產品結構日益復雜，且競爭日趨激烈，對機械產品的性能要求越來越高，對產品的優化已從對零部件的優化發展為對整機甚至產品序列的優化，這使得用傳統的優化方法建立模型困難，而且難以求解，從而迫切需要一種新的優化設計方法。
  18. Within the specified time limit, the strategy determines and implements an optimal feed - forward control sequence to the system, swings up the double inverted pendulum from its hanging position, and achieves zero speed state at the upright position

    該策略通過在規定的時間內向系統施加一前饋控制序列，使上、下擺桿從自然懸垂位置擺到倒立點位置並使速度為零。
  19. Then a fast computing method is presented to estimate the curvature of edge points and the points at which curvature is less than some threshold are collected to fit lines

    為提取直線邊緣，使用改進的序列細化演算法將邊緣細化為單像素寬，而後用一種快速曲率估計方法估算邊緣點的曲率，並保留估算值很小（約等於零）的點擬合直線。
  20. It enhances the efficiency and reliability of sequence computing method, promotes the capability of handling the assembly that has a large number of parts

    該演算法克服了以往裝配序列生成演算法的主要缺點，增強了演算法效率及可靠性，能夠處理的零件數目大大增加。
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