正弦表 的英文怎麼說

中文拼音 [zhēngxiánbiǎo]
正弦表 英文
sine table
  • 正 : 正名詞（正月） the first month of the lunar year; the first moon
  • 表 : Ⅰ名詞1 （外面;外表） outside; surface; external 2 （中表親戚） the relationship between the child...
  1. The expression for g can be rewritten in terms of trigonometric sines and cosines.

    關于g的表達式可以重寫成三角函數的正弦和餘弦形式。
  2. The signal we named it fundamental wave ; according to the fundamental wave, coefficients of the fundamental wave can be lined in a sequence. when the unique of the dissolve of the fundamental wave can be confirmed, the sequence of the coefficients can be regarded as one of representation forms of the signal itself ; theory of dissolvable signal shows that when order of the matrix of fundamental wave sampling equals to number of fundamental waves, the sequence of the sampling values from sampling points must be matched one by one with the sequence of the coefficients of fundamental waves. the sampling composed by sequences of the sampling values must be full sampling ; the relevant deductions of the theory of dissolvable signal shows that when sampling the signal, sampling frequency must be lager than the ratio of the number of fundamental waves to the occupation time of the fundamental waves ; to band - limited signals, when the fundamental wave is a sine signal, the results from the relevant deductions of theory of dissolvable signal is coherent to the classic sampling theory

    本文通過分析認為，當信號集中的任一信號可表示為一系列已知信號的線性代數和時，信號集便構成可分解信號集，已知信號稱為基波信號；對可分解信號而言，基波系數構成一序列，當對指定的基波信號集分解唯一確定時，系數序列本身便是信號的一個表示；可分解信號采樣定理指出當基波樣值矩陣的秩等於基波數時，則由采樣點處的采樣樣構成的樣值序列必與基波系數序列一一對應，從而由該樣值序列構成的采樣必為完全采樣；可分解信號采樣定理中的推論指出，對信號集進行采樣，采樣頻率必須大於其信號分解的基波數與其對應時長之比；對有限帶寬信號，若基波信號為正弦信號時，由可分解信號采樣定理推論給出的結論與經典采樣定理一致。
  3. Experimental results certify that the proposed flyback inverter features small thd in the output sinusoid voltage, small size, light weight and fast dynamic response

    研製的100va原理樣機實驗結果表明，該逆變電路輸出正弦電壓失真度小，體積小，輸出動態及靜態性能良好。
  4. The identification results of step and sine steering angle input showed that the proposed identification method is not only practical, but also with high accuracy

    通過方向盤角階躍輸入和正弦輸入的識別結果表明，這種識別方向盤角輸入的方法是可行的，並且具有識別精度高、運算速度快等優點。
  5. Section ii describes the design approach and implementation of speech module on mcf5249 coldfire core. the speech codec optimizes g. 729a codes and added voice activity detection of g. 729b to save bandwidth ; the implementation of acoustic echo cancellation uses nlms algorithm and it can reduce echo though designing adaptive fir filter and speech detector ; the dtmf and cpt generate signal using two second order digital sinusoidal oscillators and detect signal by picking up the frequency information. but only get the frequency information is not enough in cpt detector, this thesis introduces a method

    其中對語音編解碼器的設計採用優化g . 729a代碼達到設計要求，並在此基礎上加入g . 729b的靜音檢測模塊，以進一步降低網路傳輸帶寬;對回聲消除器的設計採用nlms演算法，通過設計自適應fir濾波器和語音檢測器達到回聲消除目的;對雙音多頻設計，信號發生端採用構造靜態參數表並通過二階正弦振蕩器產生信號，信號檢測端提取頻率信息以檢測信號;對呼叫進程音設計，除了類似雙音多頻的信號發生及頻率檢測設計外，還需要檢測信號持續時間，作者設計了一種基於匹配狀態表的方法以檢測信號持續時間。
  6. Furthermore, this dissertation also gives a comprehensive analysis and comparison to the torque ripple factor, torque - current ratio and other aspects for pseudo - sinusoidal emf bldcm drived by 120 conduction mode, 180 conduction mode and self - synchronous svpwm mode respectively. the simulation and the experimental results indicate that self - synchronous svpwm method is more effective for minimizing the torque ripple without any expense of the torque - current ratio when the crest width of the back - emf waveform is less than 107 electrical angles

    對準正弦波反電動勢無刷直流電動機在120導通方式、 180導通方式和自同步svpwm三種控制方式下的轉矩脈動系數、轉矩電流比等方面進行了全面的分析與比較，模擬研究和實驗結果表明，當反電動勢的平頂寬度小於107電角時，採用自同步svpwm控制方法可以在不損失轉矩電流比的基礎上，更有效地抑制電磁轉矩脈動。
  7. Time - dependent quantities - part 3 : complex representation of sinusoidal time - dependent quantities

    時控數值.第3部分:正弦時控數值的多元表示法
  8. Inside the film, the field varies sinusoidally and the entire surface-wave mode propagates alone the horizontal z direction.

    在薄膜內，場按正弦函數變化，整個表面波模沿水平Z方向傳播。
  9. Through calculation of a living example and its result analysis verified that while the vibration amplitude is comparatively small and the sine curve is being adopted, the theoretical contour of cam possesses rather good form closure property and is suitable to be applied for high - speed cam

    通過實例計算和結果分析，表明該凸輪理論廓線採用正弦曲線，在振幅較小時，有較好的形封閉性，適合用於高速凸輪。
  10. During the temperature fields, the results indicate that the processing parameters such as the extrusion velocity, casting temperature, perform preheating temperature, die preheating temperature and so on are important for the temperature fields besides the dwell time. they are must be in concordance each other to the deforming zone is in the quasi - solid state, and the stable semi - solid extrusion is implemented. during the deforming fields, the hyperbolic sine thermo - rigid - viscoplastic fem model is selected according to the forming feature of the process, and the variations of the stress - strain fields are studied

    在溫度場的模擬中，模擬結果表明，保壓時間是影響製件成形質量的關鍵因素之一，擠壓速度、液態金屬澆注溫度、預制體預熱溫度和模具預熱溫度等工藝參數對溫度場的影響也很大，需進行參數之間的協調，只有當變形區內部始終維持準固態時，才能實現穩定的液-固擠壓成形過程；在變形場的模擬中，根據液態浸滲擠壓的成形特徵，選用了雙曲正弦剛-粘塑性有限元計算模型，研究了變形過程中應力應變場的變化規律，研究了模角對變形和金屬流動的影響及變形力的變化過程和其影響因素。
  11. Proof of readings of wattmeters working in non - sinusoidal circuit

    非正弦單相電路電動系功率表的讀數推證
  12. The method of both active power measuring and the analysis of the nonlinear measuring error in its power measurement circuit

    電動系功率表測量非正弦單相有功功率的讀數推證
  13. Cs5460a adc based instrument for measurement of non - sinusoidal electric quantities

    的非正弦波電參量的測量儀表設計與實現
  14. Non - sinusoidal oscillation has the characters that the upward time of the continuous casting mold is longer than the downward time. it can reduce the friction between the mold wall and the strand surface, and prevents the strand from leaking and cracking, it can also improve the surface quality of slabs. it is the main development of continuous casting mold in the future

    其中非正弦振動具有上升運動時間比下降運動時間長的特點，能減小結晶器與坯殼之間的摩擦力，防止坯殼的拉漏和拉裂，改善鋼坯的表面質量，是今後連鑄結晶器振動發展的主要方向。
  15. The standard sine waveform is generated by looking up the sine table, and the triangular carrier waveform is produced by a reversible counter

    Spwm信號的產生採用正弦波與三角載波比較的方法，標準正弦波採用查表法實現，三角載波用可逆計數器實現。
  16. In this section, with time _ sharing method and the symmetry of sine wave, the look - up table needed to generate three - phase sine wave is reduced to one twelfth of the table before, and the optimization will have no any effect on precision, at the same time, the generation way of the monopolar spwm is improved

    在這一部分，還對產生二相正弦波的正弦表進行了優化，利用分時復用和正弦波的對稱性，把所需的正弦表減少為原來的1 / 12 ，並保持優化后的精度不變。同時改進了單極性spwm的產生方法。
  17. This paper put forward a method of using amending sine value in the spwm sine table. this method can correct the distortion of the output voltage waveform, which resulted from the dead time used to the voltage type whole bridge main circuit. the inverter system adopts digital fuzzy controller with feed forward correction and which proportion coefficient and integral coefficient is changeable, so dynamic response is improved

    本文提出了一種採用修補spwm正弦表值的方法，用以改善電壓型全橋逆變主電路因上下橋的功率器件切換時先關斷后導通的死區時間而引起的輸出電壓波形畸變；逆變系統採用帶前饋校正的變比例變積分系數的模糊控制器，提高了系統的動態響應指標；系統設計了完善的保護措施，並具有市電電網的故障診斷功能。
  18. And classic pid control method and numerical pid control method have been introduced in the paper. the paper adopt stabilization border method to set the pid parameters and simulates the control system which is based on matlab / simulink. simulation results indicate that pid control ’ s simulation results have a good effect in low - frequency stage, but it is not perfect in mid - frequency and high - frequency stage

    採用穩定邊界法實現對pid參數的整定，並基於matlab / simulink對控制系統進行了模擬，模擬結果表明:低頻段pid控制正弦跟蹤曲線取得了良好的效果，而在中頻和高頻段時的跟蹤效果不是很好， pid控制的階躍響應超調量較大， pid控制三角波曲線的高頻性能也不理想。
  19. It was proposed that oversampling is necessary by analyzing the influence of different sample frequency on the decomposition of sine wave

    對單頻正弦信號的分析結果表明，應用局域波分解對信號進行分析時，要對信號進行過采樣。
  20. The outputs of tests on the thin plate under different inputs have been investigated for testifying the system. different solutions have been compared according to the frequency - spectrum characters and structure modal parameters. it is indicated that the solutions in this paper are consistent with the solution of the fea methods

    以薄鋼板為實例，探討了不同激勵條件下，包括正弦穩態激勵、正弦慢掃描、單次錘擊和隨機錘擊激勵，薄鋼板振動系統的響應情況，以頻譜特性和模態參數為參考，將各種方法的求解結果作了比較，結果表明：本系統得出的結果與有限元解具有一致性。
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