準正弦量 的英文怎麼說
中文拼音 [zhǔnzhēngxiánliáng]
準正弦量
英文
quasi-sinusoidal quantity-
For the bldcm which has a pseudo - sinusoidal back - emf waveform, this dissertation presents a svpwm control method using six discrete position signals for minimizing the torque ripple. the main aspects for the implementation of this method are analyzed, including the initial orientation of the voltage vector, reasonable choice of the impedance angle and the advance commutation angle, and estimation of the successive rotor positions
針對反電動勢類似正弦的準正弦波反電動勢無刷直流電動機，本文提出一種基於六個離散位置信號的自同步svpwm （電壓空間矢量法）控制方法，用以削弱電磁轉矩脈動，分析了實現這種方法的主要控制環節，包括起動時電壓空間矢量的初始定位，阻抗角與電流超前角的合理選擇以及連續轉子位置的估計等。Trial - use standard definitions for the measurement of electric power quantities under sinusoidal, nonsinusoidal, balanced, or unbalanced conditions
試驗用標準定義.在正弦曲線，非正弦曲線，平衡和非平衡條件下電力數量測量的試驗用標準定義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。Standard test method for young ' s modulus, tangent modulus, and chord modulus
楊氏彈性模量正切模量和弦切模量的標準試驗方法Biology, etc. owing to many merits has not yet been used to measure parameters of gratings. the paper researches on the subject in view of current lack of it. the main tasks of the paper include : analyzing ellipsometric characteristics of gratings in detail with vector diffraction theory and ellipsometrics ; devising a reflective quarter wave plate at normal incidence according to some ellipsometric characteristics ; making use of normal simplex algorithm during ellipsometric inversion of gratings parameters, inversing ellipsometric parameters with gaussian noise of different standard deviations to simulate actually measured values with examples of isotropic metallic and anisotropic step gratings and testing that ellipsometry about gratings parameters is feasible with the range of certain precision ; discussing choice of incidence angle at length
本論文的主要工作包括：結合光柵的矢量衍射理論和薄膜的橢偏理論，詳細分析了光柵的橢偏特性；並且根據一些橢偏特性設計出一款正入射反射型單波長1 4波片；在光柵參數的橢偏反演中，引入正單純形法作為反演演算法，分別以各向同性的正弦形金屬光柵和各向異性的階梯型光柵為例，在標準橢偏值的基礎上加入不同偏差的高斯噪聲來模擬實際的橢偏測量值進行反演，在一定精度范圍內得出滿意的光柵參數，說明光柵參數的橢偏測量是可行的；還就入射角的選取問題進行了一定的探討。Then by the method of computer simulation, the following jamming patterns are made quantitative analysis, radio - frequency noise jamming, continuous single tune jamming, continuous noise amplitude - modulated jamming, relayed frequency shift jamming, and the key factor which affect the quality of these jamming patterns
然後在此基礎上，通過計算機模擬分析，定量地討論了射頻噪聲干擾、連續正弦波干擾、轉發移頻脈沖干擾以及影響它們干擾品質的因素，並以壓制系數為衡量標準，進行了干擾效能分析。Quasi - sinusoidal quantity
準正弦量Abstract : a method to estimate error of measureing electrical power for nonsinusoidal ac with intelligent instrument is presented in this paper. it is useful to ac circuit controlled by scr. using this method and calculating by computer, the errors of power and voltage and current can be estimated accurately
文摘:介紹了估算智能瓦特表測量非正弦交流電功率誤差的方法，它適用於各類晶閘管控制的非正弦交流電路.採用這一方法並用計算機計算，可較準確的算出電功率、電壓和電流的誤差This paper introduces ieee trial - use standard 1459 - 2000 and compares the old and new definitions of the apparent power s. it also gives the definitions of electric power quantities under sinusoidal, nonsinusoidal, balanced, or unbalanced condition in detail
本文介紹和分析了ieeestd1459 ? 2000暫行使用標準，比較了關于視在功率s的新舊定義的不同。介紹正弦、非正弦單相系統的電量的定義，詳細分析了正弦、非正弦和對稱、不對稱的三相系統的功率的定義和計算。分享友人