餘弦分量 的英文怎麼說

中文拼音 [yúxiánfēnliáng]
餘弦分量 英文
cosine component
  • 餘 : Ⅰ同「余」Ⅰ-Ⅳ1. Ⅱ名詞（姓氏） a surname
  • 分 : 分Ⅰ名詞1. （成分） component 2. （職責和權利的限度） what is within one's duty or rights Ⅱ同 「份」Ⅲ動詞[書面語] （料想） judge
  • 量 : 量動1. （度量） measure 2. （估量） estimate; size up
  1. Considering the influence of high evanescent modes, we have obtained the common theory. by the comparing between theoretical calculation and experimental data, we found the theory can accurately describe the high - frequency characteristic of this kind of slow - wave helical groove structure. then, five representative shapes are chosen and researched particularly ( triangle shape, cosine shape, trapezoid shape, rectangular shape and swallow - tailed shape )

    主要工作成果和創新之處在於: 1 .通過考慮高次模式的影響，獲得了一種更為精確分析任意槽形螺旋槽結構的普遍理論，經與實驗測量值比較，發現它更能準確可靠地描述此類螺旋慢波結構的高頻特性，然後詳細研究了五種槽形狀（三角形槽、餘弦形槽、梯形槽、矩形槽和燕尾形槽）對螺旋槽慢波系統導波特性的影響。
  2. This paper include the following parts. firstly the sine exciting - voltage is guaranteed by direct digital synthesize technology ; secondly the digital output of cos ( 9 ) and sin ( 9 ) are generated by microcontroller ; thirdly the two voltage signals which are the product of the two former signals gained by the multiplying d / a converter, being filtered and amplified, have constant frequency, and one amplitude has sine function relationship of with the input angle, and the other amplitude has cosine function relationship of with the input angle ; finally the two signals are acquired and analyzed by relative instrument and software

    主要由以下幾部分組成：用數字頻率合成技術（ dds ）產生正弦激勵電壓信號u _ msin （ t ） ；用單片機產生幅度的數字量輸出sin （ ）和cos （ ） ；用乘法型d a轉換器實現激勵電壓和幅度的乘積，並通過濾波器和功放后即得到頻率固定，幅值隨輸入角成正餘弦變化的電壓信號；最後用數據採集卡採集輸出信號，顯示波形並進行頻譜分析。
  3. A method that combines category - based and keyword - based concepts for a better information retrieval system is introduced. to improve document clustering, a document similarity measure based on cosine vector and keywords frequency in documents is proposed, but also with an input ontology. the ontology is domain specific and includes a list of keywords organized by degree of importance to the categories of the ontology, and by means of semantic knowledge, the ontology can improve the effects of document similarity measure and feedback of information retrieval systems. two approaches to evaluating the performance of this similarity measure and the comparison with standard cosine vector similarity measure are also described

    介紹了一種綜合各層級分類類目和對應關鍵詞來構造概念體系並用於改進信息檢索系統效果的方法.為了改進文本聚類的效果，提出了將領域知識本體和文本關鍵詞詞頻相結合的基於餘弦向量的文本相似性測度方法.該本體面向特定領域，將關鍵詞以不同權值對應于各分類類目，通過其語義知識來改進文本相似性測度以及信息檢索系統的效果.進一步給出了對基於本體的相似性測度方法進行效果評價的2種策略以及該方法與經典餘弦向量測度方法的比較結果
  4. In the encoder, if the incoming block is intercoded, no dct coefficients are computed after the eob of the incoming blocks is performing a dct

    在該編碼器部分，假如輸入區塊是交互編碼模式，則僅需對輸入離散餘弦轉換區塊進行解量化及再量化之程序，無需其它任何離散餘弦轉換及反向離散餘弦轉換之運算。
  5. Wu, j. and f. g. yiu ( 1997 ), " cosine functions of gps carrier phases for parameter estimation, " journal of surveying engineering, vol. 123, no. 3, pp. 113 - 125

    吳究、林孜彥、游豐吉（ 1997 ） ， ?一次差分載波相位餘弦模式用於相對衛星定位? ，測量工程，第三十九卷，第二期，第37 - 55頁。
  6. Wu, j., s. g. lin and f. g. yiu ( 1997 ), " ambiguity and position search algorithms of gps carrier phase processing, " journal of the chinese institute of engineers, vol. 20, no. 6, pp. 643 - 650

    吳究、林孜彥、游豐吉（ 1997 ） ， ?一次差分載波相位餘弦模式用於相對衛星定位? ，測量工程，第三十九卷，第二期，第37 - 55頁。
  7. The main module of sensorless pmsm vector control such as voltage sensing, current sensing, smo rotor position estimation, speed calculation, generation of sine and cosine, vector coordinate transformation, pi regulators, svpwm vector modulation are all accomplished in the pwm interrupt service routines

    永磁同步電機無位置傳感器矢量控制的主要模塊如電壓采樣、電流采樣、滑模轉子位置估算、速度計算、正餘弦值生成、矢量坐標變換、比例積分調節器、空間電壓矢量脈寬調制等都是在pwm中斷服務子程序中完成。
  8. Thirdly, similarity matrix, dissimilarity matrix or similarity table are established based on the n - strong peaks, the overlap rate of common peaks and the cosine / sine of vectors " angle which are derived from the fingerprint chromatograms of samples. and based on these data model, clustering research has been done by k - means algorithm, biggest tree in fuzzy clustering and improved cobweb algorithm, where different results have been gained. by comparing, cobweb algorithm is the best

    本次研究利用n強峰、共有峰的重疊率和向量夾角正餘弦值對樣品色譜指紋圖譜分別建立了相似度矩陣、相異性矩陣或相似度表，以這些數據模型為基礎，分別用了k -平均、模糊聚類的最大樹法和改進的cobweb法進行了聚類研究，得到了不同的效果。
  9. A method of face classification and recognition based on dct and svm is proposed. the features are extracted by dct and a small set of dct coefficients are inputted to svm. the experiments show that the performance is satisfactory

    提出了一種基於dct和支持向量機的人臉分類和識別方法，首先對人臉圖像作二維離散餘弦變換，取離散餘弦變換系數作為特徵輸入支持向量機，然後用支持向量機進行性別分類及人臉識別。
  10. We simply introduce the application of quaternion numbers in inertial measurement, research the calculation of direction cosine array and introduce equal rotating vector to analyze cone error

    介紹了四元數法在慣性測量中的應用，研究了方向餘弦矩陣的計算方法，並引入等效旋轉矢量對圓錐誤差進行了分析。
  11. In the second part of this work, according to cosine function ' s cycle property and using the quantization square choosed by international standards such as jpeg, h261 / h263, mpeg1 / 2, a kind of dct coding algorithm that based on tabling is put forward

    第二部分採用jpeg 、 h261 h263 、 mpeg1 2等國際標準中所選擇的量化矩陣，根據餘弦函數的周期性提出一種基於查表的dct編碼演算法。
  12. The system is composed with six sections which are entropy decoder, inverse z transform, inverse quantization, inverse discrete cosine transform ( idct ), up sampling and color space transform

    Jpeg解碼演算法主要由熵解碼、逆z變換、反量化、反離散餘弦變換、內插和色度空間轉換六部分組成。
  13. This dissertation chiefly studied the theory of aoa detection using polarization. polarization coding aoa detection was put forward after compared with some other ways to detect laser aoa. the method based on law of cosines of radiation

    本論文分析和比較了激光束定向的幾種方法，基於輻射通量的餘弦定理，根據偏振光特性，提出了偏振編碼測向的方法。
  14. The sub - bands are coded and the information of direction cosine is used for iris matching, by means of which this method overcomes zoom, shift and illuminance and obtains approving effect

    將分解后子帶作為特徵編碼，利用空間向量的方向夾角餘弦作為匹配方法，有效克服了縮放、平移、光照等影響，達到了較好的識別效果。
  15. The watermarking scheme based on wavelet decomposition and discrete cosine transform using a binary pattern or gray - level pattern as the watermark, the scheme initially performs wavelet decomposition of the host image and the watermark with different hierarchy. after the pseudo - random permutation, each decomposed layer of the watermark is embedded into the dct domain of corresponding decomposed layer of the host image

    基於小波分解和餘弦變換結合的水印方案演算法以二值圖標或灰度圖標作為水印，將原圖像和水印信號分別進行不同層次的小波分解，分解后的水印各分量偽隨機置亂後分別嵌入到原圖像相應分解層各分量的dct域中。
  16. This thesis is part of the project of national science foundation of china “ study on color video coding based on four - dimensional matrix ”. a multi - matrix theory model has been established in the project. and the color video is presented into a four dimensional matrix model and the four - dimensional discrete cosine transform ( 4d - mdct ) is applied to reduce the correlation between color components and adjacent pixels

    將多個彩色視頻幀構建在一個四維矩陣模型中進行運動補償預測、四維矩陣離散餘弦變換和矩陣量化，最後利用基於上下文的變長編碼方法進行壓縮，以全面去除彩色視頻各象素之間、各彩色分量之間以及連續幀之間的相關性，從而實現高信噪比條件下的高倍壓縮。
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