phase axis 中文意思是什麼
phase axis
解釋
同相軸-
The characteristic of nematic phase is orientation order of the molecule long axis
向列相的特徵是分子長軸取向有序，可用標量序參量s表示。 -
When liquid crystal ( lc ) is in smectic - a ( sa ) phase, its molecules disperse in layers ( sandwich ) and the molecular long axis tropism is in some order and the director is perpendicular to the layers
液晶近晶a相，分子質心按層狀分佈（有層狀結構） ，分子長軸取向有序，指向矢垂直於層面。用三個序參量， ，描述。 -
While the thin films are annealed at higher temperature, the c axis of the permanent phase tends to lie in the thin films plane, which results in the higher coercivity of the thin films
隨著退火溫度的升高，薄膜永磁相c軸趨向于平行膜面，從而薄膜面內矯頑力較高。 -
The stability of electric power system has been being focused for a long time toprevent a power system from losing synchronism after sudden fault ， researchers have done much work and got many accomplishments this paper applied the direct feedback linearization ( dfl ) technique on the power system ， a strong nonlinear system simulation results by matlab proved this method efficiency main works and results are as follows ： this paper compared some existing methods in excitation control ， fast valve control and coordinated control respectively, analyzed the developments and actuality of nonlinear control research in brief, illustrated why ransient stability could be greatly improved by using the fast valve control in chapter 3 ， indicated the importance of coordinated control farther this paper introduced the inverse system theory, based on which ， discussed the dfl theory, pointed out which had consistency with the inverse theory, expanded the dfl theory combined the idiographic model equations ， made which adapt to the model of a single machine - infinite bus power system this paper referenced abundance articles and educed a set of equations ， which could describe the dynamical process of excitation and fast valve control for synchronous generators in the equations ， there were several very important parameters of power system - - rotor angle ( ) ， rotor speed ( ) ， generator q axis voltage ( eq ) ， transient voltage ( e ' q ) ， active power ( pe ) ， mechanical input power ( pm ) ， valve opening ( ) ， generator terminal voltage ( vt ) ， based on the model ， nonlinear coordinated controller and terminal voltage optimal controller have been designed by using the expanded dfl theory and lq optimal control theory the simulation results showed that the controller could keep power system transiently stable under the effects of a symmetrical 3 - phase short circuit fault ， which achieved better postfault regulation compared with another two routine methods ， one is the proportion excitation controller and proportion fast valve controller, the other is the proportion excitation controller and the optimal fast valve controller, which could exert good performance when met 1ittle disturbance either
在介紹逆系統理論的基礎上，詳細介紹了dfl理論，通過比較闡明了dfl理論其本質是逆系統方法的一類，並結合具體課題推導出的模型方程將dfl理論進行了擴展，使之適應于電力系統這個強非線性對象。通過參考大量的書籍文獻推導出一套實用的可將大型汽輪發電機勵磁與汽門綜合起來進行控制的模型方程，此模型方程涵蓋了電力系統中特別引人注目的幾個量- -轉子角、轉子轉速、發電機q軸電勢eq 、暫態電勢e ' q 、有功功率pe 、機械功率pm 、汽門開度、機端電壓vt ，在此基礎上建立了實用的電力系統簡化的數學模型，並將擴展的dfl理論應用於此模型系統，結合線性二次型最優控制理論設計出大型汽輪發電機的非線性綜合控制器及機端電壓最優控制器，通過模擬實驗與採用常規的按電壓偏差進行調節的比例式勵磁控制器+汽門比例控制及採用常規的按電壓偏差進行調節的比例式勵磁調節器和基於二次型性能指標設計的最優快控汽門（考慮發電機的飽和因素）進行了對比，證實了採用此種控制器可以有效地提高電力系統的暫態穩定性，並且在電力系統遭受小干擾時同樣具有良好的調節性能。 -
In view of the regression characteristic and the configuration maintenance demand of the regional coverage satellite constellation, the constellation configuration is optimized using the linear relations between the semi - major axis and inclination and the rates of change of the ascending node right ascension and phase, which enhance the long - term stability of the satellite constellation configuration, simultaneously the sub - stellar and the phase are controlled through changing the deviations of the semi - major axis and the inclination
摘要針對區域覆蓋衛星星座的回歸特性和構型維持需求，利用軌道半長軸和傾角與升交點赤經漂移和相位角漂移變化率之間的線性關系來優化星座構型參數，提高衛星星座構型的長期穩定性，同時通過協同控制軌道半長軸和傾角漂移量來實現區域覆蓋星座構型維持。 -
We presents a detailed studied of the linewidth of parametric light in clbo - opo caused by the linewidth of pumping beam, off axis phase matching, divergence angle of pumping, time above threshold, high gain coefficient of nlo crystal, fluctuate of cavitylength, spontaneous radiation, according to the momentum and energy conversion laws, and the sellmeier equations of the clbo, we calculated curves of the type - i and type - ii compared with the bbo ' s
根據能量動量守恆關系和clbo的色散方程，詳細分析了由於泵浦光的線寬、泵浦光偏軸泵浦、泵浦光的發散角、泵浦光功率超過參量光振蕩閾值一定倍數、高增益系數、有效腔長波動以及自發輻射引起的參量光線寬，並得到了與bbo晶體在類、類相位匹配下比較的理論曲線。 -
During the process of measuring valve phase, the grating displacement sensor and photoelectric axis - angle encoder are applied to measure the displacement of valve and the angle of curving shaft respectively. their signals are sampled and imported into computer. then the three signals are compared to find the relationship of valve phases in order to offer the reliable measuring parameters for the researchers and quality controllers
在氣門相位測量中，採用光柵位移傳感器和光電軸角編碼器，分別將發動機進、排氣門位移量和曲軸旋轉位移量的變化信號通過采樣，輸入計算機，對三路信號加以比較找出氣門的相位關系，從而為設計開發人員、品質控制人員提供可靠的測量參數。 -
The position errors are measured by two dimension single - frequency laser interferometer, the pitch and yaw errors are tested using phase shifting interferometer with a resolution of 0. 1nm, the linearity along motion axis is investigated by autocollimator with 0. 01 " uncertainty
利用單頻激光干涉儀測試其運動定位誤差特性，相位偏移干涉法測試運動轉角誤差，光電自準儀測試其運動偏擺誤差。 -
Abstract : with the use of the theory of blazed phase gratings, the color separation phase grating used for icf drivers is designed, which can off - axis separate the fundamental, 2nd and 3rd harmonic waves. theoretically, its diffraction efficiency for 0 " th order at the 3rd harmonic wave is 100 %. experimentally, a color separation grating is made. both its separation angles ( at the 1st and 2nd harmonic waves ) and its diffraction efficiencies for 0 " th order are measured, and some significant results are presented
文摘:採用相位閃耀光柵原理設計出用於icf驅動器中能離軸分離基頻、二倍頻、三倍頻激光的色分離相位光柵，理論上三倍頻零級衍射效率達到100 ，同時，對該相位光柵進行了實際製作和實驗測量，測出了基頻光和二倍頻光的分離角以及光柵的零級衍射效率，得到了一些有意義的結果。 -
The spin - coated films are single - phase and highly oriented with the c - axis perpendicular to the quartz substrates. this type of materials has good thermal stability, and their decomposition points are near 300 c
旋塗法沉積的該類材料的薄膜具有較好的單相結構，材料成膜后，其單相晶體的c軸很好地垂直於石英基片表面。 -
Prepared technical parameters were optimized by l9 ( 34 ) experiment analysis. a unique method for cleaning and drying of substrate - cleaning used by scour, drying used by infrared light was fished out by large numbers of experiment. chemical mechnism of zno thin film prepared by sol - gel technique was discussed by dta for the first time. by the measurements of sem, xrd and uvs, the thin film was analysed. the result proved that the thin film with strongly preferred orientation of c - axis perpendicular to the substrate surface which surface was homogenous, dense and crackfree was the crystalline phase of hexagonal wurtzite. the thin film was composed of plentiful asteroidal crystal which crystal dimension approximately 10 30nm. the average transmittance of thin film in visible region was above 90 %. the results of measurements else also proved that the thickness of single dip - coating was 75 240nm, this films resistivity was found to be 3. 105 102 3. 96 105 ? cm. the thickness and resistivity of thin film influenced by dope - content, withdrawal speed, pre - heat - treatment, anealing were reseached respectively
利用xrd 、 sem以及uvs光譜儀等分析方法對薄膜進行了研究，結果顯示，所制備的薄膜為六方纖鋅礦型結構，具有高c軸擇優取向性；表面均勻、緻密，薄膜材料由許多星狀晶粒組成，晶粒尺寸大約為10 - 30nm左右；薄膜可見光透過率平均可達90 % ；對薄膜厚度以及電學性能進行了測定后發現：單次鍍膜厚度約為75 - 240nm ， al ~ （ 3 + ）離子摻雜型氧化鋅薄膜的電阻率在3 . 015 102 - 3 . 96 103 ? cm范圍內；分別研究了摻雜濃度、提拉速度、預燒溫度、退火溫度等工藝參數對薄膜厚度和電阻率的影響。 -
At the same time, it states the dominant industry for each district, and defines growth pole of beijing suburbs on the basis of density of dominant industry and economical level for each district. finally, the paper demonstrates that it is necessary to build economy growth pole model of beijing suburbs on the beginning of 21s1 century on analysis of relations among dominant industry, growth pole and economic growth point, discusses evolvement rules about pole - core space structure phase. point - axis space structure phase and network space structure phase, analyses which space structure phase beijing suburbs is in, and brings forward point - axis developing model, then explains definition of point - axis developing model and important meanings for economy development of beijing suburbs, referring to principle of point - axis developing model, the paper proposes economy growth point model, and offer the policy and suggestion for government corresponding to the problems of application of economy growth point model
最後，通過論述主導產業、增長極與經濟增長點的相互關系，闡述了從產業和地區角度對主導產業和增長極進行綜合分析以構建21世紀初北京郊區的經濟增長點模式的必要性，探討了極核式空間結構階段、點軸式空間結構階段、網路空間結構階段這三種空間結構的演變規律，分析了21世紀初北京郊區所處的空間結構階段，提出了點軸開發模式，從點? ?軸開發的定義、對北京郊區經濟發展的意義進行了論述，進一步通過對點? ?軸空間結構系統的形成機理分析，借鑒點? ?軸開發的原理，提出21世紀初北京郊區的經濟增長點的構建模式，並針對這種模式構建中存在的問題，對政府工作提出了可行性建議。 -
The principal axis torsion angle, produced by torque, is converted to two channel square waves with phase difference through grating sensor. then the degree of torsion angle is measured by data collection card. finally the value of torque and the other parameters of the axis can be calculated by upper pc
將主軸受扭矩作用而產生的扭轉角，通過光柵傳感器轉換為兩路有相位差的方波信號，再通過數據採集系統檢測出扭轉角的度數，最後由上位pc機計算出扭矩的大小和主軸的各種參量。 -
The previous discussion addressed the theory required to compute the relative phase shift between adjacent radiating elements in order to position the beam of an array - type antenna to a specific angle off of the antenna boresight axis
前面的討論中給出了計算使陣列天線的波束相對天線視軸線偏移一個給定角度所需的相鄰單元間相對相移的理論。 -
For the coordination of the contradictory, the wavefront technique has been regarded as an effective method to improve the image quality in photolithography by optimizing the image of the mask. it includes : pupil filtering, phase shift mask, off - axis illumination, optical proximity correction, and so on
為了協調這種矛盾，利用波前工程來改善光刻圖形的質量以提高光刻解析度，已廣泛地應用於光學光刻中，如：瞳孔濾波、相移掩模、離軸照明、光學鄰近效應校正等。 -
If the reference element has a phase of zero, compute the phase applied to element five when the beam is scanned 40o above the boresight axis
如果參考單元的相位是零，計算第五單元當掃描視軸線以上40度的相位。 -
Similarly, to position the beam below the boresight axis requires the use of a negative angle. this yields a negative and equation ( 7 - 4 ) again yields the applied phase of each element
同樣的，要使波束低於視軸線要求負的角度。增量就是負的，式（ 7 - 4 ）仍可用於計算每個單元的增量。 -
A mathematical model based on fourier optics is developed to analyze the digital recording mechanism and properties of the in - line phase - shifting digital holographic system in comparison with those of the commonly used off - axis arrangement. theoretical analysis demonstrate that in - line configuration is advantageous in enhancing the system performance
第三章將同軸相移數字全息記錄與再現過程等效成一個相干光學成像過程，基於傅里葉光學理論對其成像特性進行系統的理論分析。 -
Based on geological radar penetrating practice for soil and stone dam hidden dangers of reservoirs in northwestern loess areas and from the variations of the disturbance, pore ratios and water contents of the soil bodies in the percolation positions, the authors analyzed the variations of geological waveform characteristics and waveform phase axis continuation, and summed up the graph characteristics of the percolation hidden dangers in different periods
摘要通過西北黃土地區水庫土石壩滲流隱患探地雷達探測實踐，從滲流部位的土體擾動、空隙比、含水量的變化入手，分析探地雷達波形特徵變化、波形同相軸連續性的變化，總結了滲流隱患不同時期的探地雷達圖像特徵。 -
While the thin films are annealed at lower temperature, the c axis of the permanent phase tends to be perpendicular to the thin films plane, which results in the lower coercivity of the thin films
退火溫度顯著影響到薄膜的織構，當在較低的溫度下退火時，薄膜永磁相c軸趨向於垂直膜面，從而薄膜面內矯頑力較低。
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