phase constant 中文意思是什麼

phase constant 解釋
波長常數
  • phase : n 1 形勢，局面，狀態；階級。2 方面，側面。3 【天文學】（月等的）變相，盈虧；【物、天】相，周相，...
  • constant : adj 1 恆定不變的，固定的，穩定的，恆久的；繼續不斷的。2 不屈不撓的，堅韌的。3 忠實的，有節操的。n...
  1. And the explicit finite difference method, the combining method of the central difference method and newmark s constant average acceleration method, and the transmitting boundary are used. by comparing the acceleration determined by the several methods of the displacements or velocities, a computing method of acceleration employed the one side difference of velocity is more practicality in this research. corresponding to normal incidence of the body waves, p waves or svwaves, and rayleigh surface waves, two two - dimensional finite difference programs are compiled to compu te the dynamic response of two - phase media

    以土力學模型為基礎，利用以土骨架和孔隙流體的四個位移為基本未知量的數值方法去模擬二維飽水介質中的地震波傳播，採用了顯式差分方法（中心差分法和newmark常平均加速度法結合）和透射邊界，通過比較利用幾種差分格式求解的加速度結果，發現一種用速度單邊差分求解加速度的方法在本文研究中較為實用，分別編制了體波（ p波或sv波） 、 rayleigh面波輸入時求解兩相介質動力響應的兩個二維數值分析程序。
  2. The trace elements, constant elements and phase states of elements, which could indicate organic matter and combination gas, were found

    發現了可指示有機質及油氣的微量元素、常量元素及元素的相態。
  3. The thickness had some influence on the development of the banded spherulites : when the thickness reduced to some degree, pcl would develop chrysanthemum - like spherulites, which had no extinction rings or the maltese cross pattern under the crossed polarized optical microscopy. the results of the phase - contrast microscopy showed that growth speed of the chrysanthemum - like spherulites along the radius was not constant

    發現薄膜厚度對球晶的生長有一定的影響，當共混物膜薄到一定程度時， pcl不能形成環帶球晶，而是形成一種類似菊花狀的晶體，在偏光顯微鏡下看不到環帶，也沒有典型球晶所特有的maltese十字消光圖案。
  4. But there is a main question that pvdf does not be in p phase with higher piezoelectric property, but be in other phases with lower or without piezoelectric property, thus, which can not improve distinctly piezoelectric constant d33, reduce notably dielectric spoilage ( tg5 ) and raise remarkably mechanical coupling factor ( kp ) of 0 - 3 pzt / pvdf piezoelectric composite, so these will restrict its development and application. in this paper, 0 - 3 pzt / pvdf piezoelectric composite will be prepared by room pressing - solidity, high - temperature - pressing and room - pressing techniques respectively

    由於這個壓電復合材料體系存在一個主要問題? pvdf在0 ? 3型pzt / pvdf壓電復合材料中通常不是以具有較強壓電性的相晶態形式呈現，多是以其它的相態存在，不能有效地提高0 ? 3型pzt / pvdf壓電復合材料的壓電常數d _ （ 33 ） 、降低介電損耗tg和增大機電耦合系數kp等壓電和介電性能，從而嚴重地制約它的發展和應用。
  5. The factors influencing the phase components, microstructure, electromagnetic parameters of magnetic particles and rheological performances of mrs were systematicly studied. the temperature is a key factor in the thermolysis of dropping fe ( co ) 5 in constant temperature

    系統地研究了合成條件對產物的物相組成、微觀結構、 2 - 18ghz的微波電磁參數及磁流變性能的影響。
  6. While two ( or more ) electromagnetic waves of the same frequency, same direction of vibration, same phase or constant phase difference superpose in space, the amplitude of composite wave is vector sum of the amplitude of each wave

    由兩個（或兩個以上）頻率、振動方向相同、相位相同或相位差恆定的電磁波在空間疊加時，合成波振幅為各個波的振幅的矢量和。
  7. Acoustic phase constant

    聲相位常數
  8. And the sm ( cocufezr ) z thin films with lower magnetocrystalline anisotropy constant of cell boundary phase will have a higher coercivity

    而較低的胞壁相磁晶各向異性常數k1 ，則有助於獲得高的釘扎場。
  9. This paper focuses on the control strategies to improve the performance of the three - phase ac - dc pwm voltage - source - converters ( vsr ) under unbalanced power supply. the problems such as negative sequences current, voltage and current harmonics and un - constant ( un - smooth ) power flow from ac to dc side are discussed in this paper. the analytical solutions for negative sequence current and harmonic current elimination are obtained by fully feed - forward of negative sequence voltage and producing a non - harmonic current command of the inner - loop

    電網不平衡時，基於電網平衡為約束條件設計的三相vsr將出現不正常運行狀態，比如三相vsr交流電流中出現負序分量，使交流電流嚴重不對稱；直流電壓和交流電流中出現非特徵諧波分量，使直流電壓和交流電流波形發生嚴重畸變；三相vsr從電網吸收不平衡的瞬時功率等一系列問題。
  10. The phase structure, the lattice constant, crystal grain diameter of the samples was obtained by the x - ray diffractions ( xrd ) spectra. their relations are showed respectively. influence of grain size on the lattice constant of several kind of phase structure was studied theoretically by interaction energy between atoms in nanocrystallites

    其次，從結合能的角度出發，研究了nacl結構和cscl結構的離子晶體，面心立方（ fcc ） 、體心立方（ bcc ）金屬晶體以及簡立方（ scc ） 、面心立方（ fcc ） 、體心立方（ bcc ）結構分子晶體的晶粒線度對晶格常數的影響。
  11. To detect the micro particles of metal is based on the phenomenon that when a metal micro particle passes through an electromagnetic field with constant speed the receiving carrier phase is changed

    根據電磁場中恆速通過金屬微粒會引起接收載波信號相角變化這一現象來檢測金屬微粒。
  12. The stator of aceg is connected to the grid and the three symmetrical excitation windings in the rotor are fed by converter. the magnitude and frequency and phase and phase sequence of excitation voltage can be controlled, so the magnitude and position of excitation mmf as well as the speed of rotor can be controlled. therefore, acegs have superior performances by contrast with conventional synchronous generators and induction generators, such as upstanding stability, power generation of variable speed constant frequency ( vscf ), adjusting active power and reactive power independently, and absorbing lag reactive power deeply

    交流勵磁發電機的基本結構與繞線式異步電機相同，其定子側接電網，轉子上採用三相對稱分佈的勵磁繞組，由變頻器提供對稱交流電勵磁，且勵磁電壓的幅值大小、頻率、相位、相序都可根據要求加以控制，從而可以控制發電機勵磁磁場大小、相對于轉子的位置和電機的轉速，使得交流勵磁發電機具有良好的穩定性及轉速適應能力、獨立的有功與無功調節能力和較強的進相運行能力，性能超越傳統同步發電機和感應發電機，因而有著廣闊的應用前景。
  13. Along with the doping content increases, the dielectric constant initially increased and then decreased. the dielectric loss was on the contrary. 4. bt _ 4 doped with bi _ 2o _ 3 or v2o5 got a lower sintering temperature. a babi4ti4o15 phase raised when bi _ 2o _ 3 was doped and the dielectric properties ruined

    3 . bst中摻雜zro _ 2 ，晶粒尺寸增大，摻雜量較大時會產生第二相bazro _ 3 ，介電常數隨摻雜量的增大呈現先增大后減小的趨勢，介電損耗則先減小后增大。
  14. Dr is made of microwave ceramic with high dielectric constant and very low loss. using dr, the phase noise of an oscillator could be made to be extremely low

    介質諧振器（ dr ）由高介電常數、低損耗的微波陶瓷材料製作而成，它能極其容易地實現微波頻率源的低相位噪聲。
  15. By theory and practice simulation, the several types of constant envelope modulation techniques are analyzed and compared, including theirs modulation principle, phase path, the modulated wave envelope, power spectrums, error bit rate and the influence of its power spectrums of the band - limited and non - linear, etc. especially we have researched the ijf - oqpsk modulation technique, and the performance of its inter - symbol interference and time jitter free, and its strongly resisting of spectral spreading

    結合理論和實驗模擬結果，分析討論了衛星通信中的各種恆包絡調制技術，對它們的調制原理，相位路徑，已調波包絡，功率譜密度，誤碼性能，以及帶限非線性通道對其功率譜的影響等方面都作了研究和比較。特別研究了ijf ? oqpsk在消除碼間干擾和定時抖動方面的性能及其優良的旁瓣特性和抑制頻譜擴展特性。
  16. Kc of each higher mode in ridge waveguide is a very important parameter, once kc is obtained, the wavelength, phase constant, phase velocity, waveguide wavelength, equivalent reactance, equivalent admittance and so on can be obtained simply. then ridge waveguide devices can be designed based on these paremeters. in view of the widely use of ridge waveguides, the research of kc is very important in practice

    由於脊波導中主模及各高次模的kc是一個很重要的參數，求出了kc ，可以很簡單地求出、相移常數，相速、波導波長、等效電抗、等效導納等等，求出這些參數后就可以用各種方法設計脊波導元器件了。
  17. It is capable to lower the insertion loss by using high conductivity electrode material and increasing the electrode thickness and quality factor of bst capacitor. at the same time increasing the tunability of the dielectric constant and the length of the transmission line can increase the phase shift

    通過使用高電導率的電極材料、增加電極的厚度、提高bst薄膜電容的q值可以實現器件插損的降低；增大薄膜的介電系數變化率和傳輸線長度可以增加移相度。
  18. A perturbation method by tight - binding approximation which provide the relation of phase constant and angular spectrum of fields of in - waveguide is presented. the strip width of phase constant can be given. on the other hand, the group delay - time due to the k dispersion in single - mode transmission can also be estimated

    提出一種利用緊束縛近似的微擾法計算陣列波導的相位常數與輸入光角譜的關系，由此算出相位常數的帶寬，並利用衍射方法估算單模傳輸中k色散引起的群延時。
  19. Specification for a. c. motors for aircraft - three - phase constant frequency squirrel - cage induction motors

    飛機交流電機規范.三相恆頻鼠籠式感應電機
  20. 100kv 2a three - phase constant - current repetitive - rate charging equipment

    三相恆流重復頻率充電裝置
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