相移器 的英文怎麼說
中文拼音 [xiāngyíqì]
相移器
英文
phase changer-
Otherwise, this paper introduces the concept of the principle signal in the same channel transferred bidirectional and the phasic equalizer
並對這些器件的測試結果進行了討論。講述了同頻信號雙向傳輸原理及相移均衡器的簡單概念。Relaxor ferroelectric single crystals, such as pb ( mg1 / 3nb2 / 3 ) - pbtio3 ( abbreviated as pmnt ) or pb ( zn1 / 3nb2 / 3 ) - pbtio3 ( abbreviated as pznt ), have been reported to exhibit an extremely large piezoelectric constant and excellent electrostrictive properties. such excellent performance makes it fully substitute the traditional piezoelectric ceramics and points to a revolution in ultrasonic transducers, actuators and micro - positioners, making relaxor - based piezocrystals the most promising materials for a broad range of advanced applications. however, it is difficult to grow the high quality single crystals because of the lack of valid thermodynamic data
新型弛豫鐵電單晶鈮鎂酸鉛（簡稱pmnt ）或鈮鋅酸鉛（簡稱pznt ）是一類新興的功能材料，其在準同型相界附近具有優于傳統壓電陶瓷的較高的壓電常數和電致伸縮系數，可完全代替傳統的壓電陶瓷作為超聲換能器、致動器、微位移器等，使其成為鐵電領域的研究熱點，但如何生長出滿足應用要求的單晶材料卻一直是一個困擾的問題。Three main error sources are the variation of intensities, the orientation errors associated with the configurations of the polariscope and the initial stress existing in the model. a quantitative method is presented to analyze and estimate the influence of different error sources on the final isoclinic results calculated by fcpst or the other pst
本文提出它們影響五步彩色相移法的定量誤差分析方法；提出控制各誤差的具體指標；給出了避免或降低這些誤差源影響的措施，為合理設計製造儀器、指導實驗和保證實驗結果的精度提供了依據。Secondly, in phase unwrapping to overcome the spread of wrong point, changing the patch of unwrapping phase is done to improve the correctness of it. then, the relation between the unwrapping phase and the height of reconstructed object is discussed detailedly. the data processing, algorithm analysis and reconstructing object are done for the collecting fringe image which are all based on matlab language, in all these achievements, the improvement and innovation aspect are following : a ) in order to stabilize the interference fringe, a new equivalent shifting object method is presented by using fringe stabilizing device to stabilize the interference fringe though moving object and ccd camera which fixed on a precise moving platform together, the experimental result shows the fringe drift is less than a / 20 in five minutes, and the equivalent phase shifting precision is x / 100
論文在全面闡述了光學三維輪廓位相測量術的發展、應用現狀、研究熱點及未來發展趨勢的基礎上，簡要介紹了傅立葉變換和相移位相輪廓測量術的基本原理，對兩種測量方法存在的問題及誤差進行詳細分析和比較；針對位相解包裹錯誤點的傳播問題，作者通過改變解包裹路徑來提高位相解包裹的正確性；分析討論從解包裹位相（ x ， y ）到再現物體的高度h （ x ， y ）物理量之間的關系，研究相應的演算法，利用matlab平臺，對實際採集的條紋圖像進行處理和輪廓重構，其中改進及創新工作主要表現在以下兩個方面： （ a ）針對干涉型結構光場干涉條紋出現的漂移抖動對相移的影響，提出了一種用條紋穩定器穩定干涉條紋，用精密移動平臺使物體和ccd攝像頭同步移動實現等效相移的方法，建立了相應的測量系統，系統的條紋穩定可以達到。Functional generator having programmabledigitization of arbitrary wave form and dephasing
可編程數字化任意波形及任意相移的函數發生器Further investigated and analyzed composition structure and flow data that dsa ' s formation of image is systematic at first in this paper, carried on intact summing up to the data in the system, having given out the plan of design of high speed and large capacity data channel of digital formation of image system of x - ray ; deeper discussion of control way on sdram, give solution that many pieces of sdram works togetherses of realizing heavy capacity, designing of heavy capacity deposit board realize storing at a high speed to vision data by frame on the basis of this ; through further investigations of interface of pci bus, optimize back end state machine design and urge procedure making with lower, giving intact pci interface scheme that realize high speed dma data transmission and satisfy request of video transmitting ; further investigate the figure systematic design method of programmable logic devices, due to the difficult point of drifting about of enabled signal in fifo in common use and setting up and keeping of output signal, method has been proposed of improving stability of system making use of signal utilizing the phase locking ring in fpga to offer a lot of clocks to move thus realize coordinating the data between every module of system to transmit at a high speed by making use of fifo
本文首先對數字減影血管造影（ dsa ）成像系統的組成結構和數據流向進行了深入研究和分析，並對系統中的數據流向進行了完整的歸納和總結，給出了x線數字成像系統中的高速大容量數據通道的設計方案；在對sdram的控制方式做了深入探討后，給出了實現大容量多條sdram共同工作的解決方案，在此基礎上設計了大容量幀存板實現對圖象數據進行高速存儲；通過對pci總線介面的深入研究，優化後端狀態機設計和低層驅動程序開發，給出了完整的pci介面方案實現高速dma數據傳輸，完全可以滿足視頻傳輸要求；深入研究了基於大規模可編程器件的數字系統設計方法，針對通用fifo使能信號漂移、輸出數據難于建立和保持等設計難點，提出了利用fpga中的鎖相環提供多個時鐘相移的信號來提高系統穩定性的解決方案，從而實現利用fifo來協調系統各模塊之間的數據高速傳輸。The soft switching, phase - shifted pwm and bi - directional dc - dc converter hang together, depress circuit switching loss and noise effectively, which provide condition to increase switch frequency, efficiency and reduce size and weight for the converter ; at the same time, it is proved the converter can achieve zvs in larger load variation, and the converter has the virtue of structure compact, voltage and current stress small such as ordinary hard switch converter
該變換器把軟開關技術和相移控制pwm技術以及雙向dc - dc變換器技術有機結合在一起，有效地降低了電路的開關損耗和開關噪聲，為變換器裝置提高開關頻率、效率以及降低尺寸及重量提供了良好的條件;同時，能拓寬零電壓開關的范圍，使變換器在較寬的負載變化范圍內都能實現軟開關。Differential group delay measurement of single - mode components and devices by the differential phase shift method
利用微分相移法進行單模元器件和裝置的群時延差測量Used in the rated voltage 250v single - phase electric appliances which are mobile and used indoor or outdoor, and used to connect electric power
一用途供可移式戶內或戶外，家有或類似用途的，僅用於交流電的最高電壓為250v的單相電器和電源連接的用途。The circuit has good characteristics and is applied in ect system. 3 ) the influence of stray capacitance on the c / v circuit is discussed, according to its conclusion, the appropriate component, parameter and phase shift is find out
分析了雜散電容對c v變換電路性能的影響，並以此為依據選擇合適的器件、電路參數及適當的相移調整，解決了雜散電容給電路帶來的影響。Another increasingly important ( actor is to be integrated with analog and digital circuits. for this reason, it is highly advantageous for the microwave components to be fabricated through a commercial cmos process. so we research the microwave transmission lines and apply it into phase shift
微型硅基微波傳輸線是微波無源、有源器件及微波集成電路的重要構成基礎，本文首先對其工作原理、器件模擬、結構參數設計、制備及散射參數測試進行較深入全面的研究，並進一步將微波傳輸理論應用於mems移相器，對移相器的結構參數、相移特性及可靠性等進行了分析。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。Finally, it takes a detailed test to the processed millimeter 4 - bit digital phase shifter. the test result is better than expectant guideline : the maximum of the phase error is 10, the insertion loss is better than 10. 74db, the return loss is more than - 14. 88db in the 33. 9ghz 34. 5ghz frequency band. the whole volume of the phase shifter is 80mm 35mm 20mm
最後，對加工出的毫米波四位數字移相器進行了測試，測試結果完全達到了預定指標要求:在所要求的33 . 9ghz 34 . 5ghz頻帶內，最大相移誤差小於10 ，插入損耗小於10 . 74db ，輸入輸出回波損耗大於- 14 . 88db ，整個電路尺寸為80mm 35mm 20mm 。In this chapter, the method of bldcm rotor position detection is first discussed. then the principle and algorithm of bemf zero crossing point detection is explained. in succession, the chapter dissertates the software realization of the bemf zero crossing point detection algorithm, the software disturbance filter and the modification of phase displacement, and the software realization of commutation point
在這一章中，先簡述了無刷直流電機的轉子位置器檢測方法；然後論述了反電動勢過零檢測原理和演算法以及該演算法的軟體實現、軟體濾波和相移修正、換相點的軟體實現；最後對軟體開環換相起動策略作了詳細論述。The gradient method is combined to the apprioach in order to enchance the efficiency of the algorithms in local area. after optimization, a high performance millimeterwave mems phase shifter is obtained
經過優化設計，最後給出了一個高性能的工作在毫米波段的mems相移器的實例。Principle design of liquid phase shifter for ion cyclotron range of frequency on east
離子迴旋系統液態相移器的理論設計Mps manual phase shifter
手控相移器Another important part of this paper is optimal design of a micro - electromechanical systems ( mems ) phased shifter using genetic algorithms ( gas )
將遺傳演算法應用於毫米波微電子機械繫統（ mems ）相移器的設計和優化是本論文的一個重要組成部分。In accordance with the phase - shift miscalibration and detector nonlinearity, the error - compensating phase - shifting algorithms based averaging technique are proposed. and in order to solve the problems brought by traditional linearity scanning unwrapping algorithm, which leads to incorrect phase unwrapping, a correlative region algorithm for phase unwrapping is developed
針對相移器的相移不準給相位求解帶來的誤差，提出採用基於平均技術的誤差補償移相演算法；針對傳統線掃描位相去包絡演算法不能對含有較大噪聲的位相圖進行正確去包絡的問題，提出了區域相關位相去包絡演算法。The result shows this measure system is very simple, performance reliable, operating convenience, and its precision approaches to 1 %. it takes an important role in large - scale measurement and in practice the new method shows stronger practicality and popularly application prospect
實驗結果表明：該測量系統非常容易獲得大視場的正弦光場，且系統裝置簡單、不需要相移器、操作方便、穩定和重復性好，其測量精度達約為1 ，在大尺寸物體的三維輪廓測量中具有實用性和推廣應用前景。分享友人