reference phase 中文意思是什麼
reference phase
解釋
參考相位-
It has important value in military and civil. conventional algorithms for synthetic aperture radar uses the matched filter and convolves the data with a reference phase signal which changes with range
合成孔徑雷達（ sar ）是二戰后發展起來的一種新的雷達技術，在軍事和民用方面都有重要的應用價值。 -
In this thesis, firstly, we put forward a new algorithm of the synchronization of carrier reference phase, that is to use the curve synthesizing with the general digital carrier phase looper to have an estimation on carrier frequency within 10 ms so as to meet the need of meteor burst communication. we have done some simulations to get the performance of carrier frequency estimation using two modulation modes ( 16qam and 4 - qpsk ), and had some test on the carrier phase looper in conditions when using different baud rate transmission and when the baud tuning have windage
我們對兩種正交調制方式（ 16qam和4 - qpsk ）進行了模擬工作並給出了模擬結果，同時討論了碼元同步定時誤差對鎖相環路工作的影響並根據流星通信中使用變速率傳輸時鎖相環路的載波同步性能進行了測試；然後在基於軟體無線電思想的數字處理平臺（該數字處理平臺實現了中頻數字化）上用dsp軟體完成了載波的相位跟蹤。 -
An n - order tracking differentiator and its application in prediction of reference phase angle of electric power system
微分器及其在電力系統相角預測中的應用 -
1 m 0. 5, the phase - shifted angle 6 is controlled in term of sine law which makes the magnitude of resonant voltage track a reference sine voltage, and the resonant voltage is rectified, filtered, inverted and then the better sine - voltage output is obtained, theoretical analysis and experimental results show that for the resistive load and inductive load, the switches of leading leg of the phase - shift - controlled circuit are always turned on at zvs, and ones of lagging leg are turned on at zvs ( < 0 ) or turned off at zcs ( ( > 0 ), moreover, all switches in the low - frequency inverter are always turned on and off at zvs, the measured circuit efficiency for rated load reaches up to 88 %
從功率單向流動角度出發，提出了一種lcc諧振型恆頻移相單相高頻鏈逆變電路拓撲，在調制系數0 . 1 m 0 . 5情況下，控制移相角按正弦規律變化，使諧振電壓脈沖列的幅值追蹤參考正弦電壓信號，經過整流、濾波、低頻逆變，從而獲得正弦度較好的輸出電壓。理論分析和實驗結果證明對于阻性負載或阻感性負載，移相全橋具有超前橋臂零電壓開通，滯后橋臂或者零電壓開通（ _ 0 ）或者零電流關斷（ _ 0 ）的軟開關特性，而低頻逆變器的各個開關均實現零電壓條件下的開通與關斷。 -
This paper gives a comprehensive comparative study of library reference service between china and foreign libraries under the networking environment. through cases of some libraries, the paper thinks that digital reference service in china is at a simple phase and disparate development, and should improve
文章對網路壞境下中外圖書館參考咨詢工作進行了比較研究，通過國內外圖書館的一些實例分析，提出我國圖書館數字參考咨詢服務手段與方式尚處于初級階段、各地區及各類圖書館參考咨詢服務發展很不平衡、人員素質亦有待提高的觀點。 -
Therefore, the three fundamentals required to obtain high precise measurements are : 1 ) frequency stability and frequency difference stability of the double - frequency laser source as well as the stable equivalent length of bore ; 2 ) the measuring beam and the reference beam are placed very co - axially ; 3 ) capability of recording the sub - division of the period of phase change and a reversible counter system
因而干涉儀系統達到高精度的基礎是：頻率及頻差穩定的雙頻激光源、穩定的等效腔長；測量光與參考光合光後有很高同軸度的光路結構；能可靠記錄相位差變化周期數的細分及可逆計數系統三部分。 -
Methods of estimating baud rate, signal to noise ratio ( snr ) and reference phase are investigated. a modified euclidean algorithm is proposed to estimate baud rate of the burst packets. a cumulant based algorithm of estimating snr of star - qam is proposed which has better estimation performance in medium scope of snr
研究了自適應調制中波特率，信噪比和載波相位等參數的估計演算法；提出一種基於修改的歐幾里得演算法的波特率估計演算法，這種演算法可以對突發分組的波特率做出準確估計；提出一種星型qam信號的信噪比估計演算法，在中等信噪比條件下，具有較好估計性能。 -
With regard to the second phase water supply pipe project of no. 4 dongguang waterworks, an introduction was given to the selection of pipe jacking system, measures for resistance alleviation, application of intermediate jacking room, and control of axes in jacking construction of long distance steel pipe with large caliber, these may provide the reference for the construction of resembling project
摘要結合東莞市第四水廠二期給水管道工程過107國道段的頂管施工，介紹了大口徑鋼管進行長距離頂進施工時頂管機的選型、減阻措施的選用、中繼間的運用、軸線控制等問題，可供以後同類工程參考和借鑒。 -
The ade7758 is a high accuracy 3 - phase electrical energy measurement ic. it incorporates adcs, a digital integrator, reference circuitry, temperature sensor, and all the signal processing required performing active, reactive, and apparent energy measurement and rms calculations
Ade7758是高精度三相電量測量專用晶元，它集成了adc 、數字積分器、參考電路、溫度傳感器以及電能測量和有效值計算的數字處理模塊。 -
Because central potentials of four y windings in 12 - phase generator are not equal each other and there is no common reference inside the generator, it is difficult to identify the on / off of rectifying elements. in this paper, by using a mathematical model with line voltage substitute for phase voltage, the problem that there is no common reference in the 12 - phase generator with rectifier is solved. based on results of the studies on small prototype, 920kw charging generator applied in a submarine is improved in design, and therefore power oscillation with high magnitude when two generators are operating in parallel
由於十二相發電機中四個y繞組的中點電位不等，電機內部沒有公共參考點，從而在判斷整流元件導通時，不能象三相同步發電機整流系統那樣認為陽極電位最高或陰極電位最低的整流元件導通，本文採用了以線電壓代替相電壓建立十二相整流發電機的數學模型，從而解決了十二相發電機無公共參考點的問題。 -
A device that converts a property of an input signal, such as frequency or phase, into an amplitude variation, depending on how the signal differs from a standard or reference signal
鑒別器，鑒頻器一種將輸入信號的某一特徵，如頻率或相位轉變為幅度變化裝置，其變化大小因信號與標準或參考信號的不同程度而異 -
Based on the structural features of semi - cylinder composite dike in the yangtze estuary deepwater channel regulation phase project n a section, the key technique of such semi - cylinder transportation procedure and precasting quality is analyzed and summarized, which may serve as a reference for relevant construction
摘要依據長江口深水航道治理二期工程n a標整治建築物中半圓體混合堤結構形式，對這種半圓體大型構件出運工藝與預制質量控制的技術關鍵進行分析總結，供同行參考。 -
To add " recently " after " grave concerns expressed " ; to delete ", and for the effective conservation of " after " the queen s pier in central " and substitute with " and their discussion on the four proposals put forth by the government for dealing with " ; to delete " adopt " after " immediately " and substitute with " make reference to " ; to delete " and to undertake to adopt conservation in - situ, minimal interference, preservation of the original condition and protection of the heritage environment as the principles for formulating " after " in 2000 " and substitute with " to formulate " ; to delete " implementing " after " expeditiously " and substitute with " implement " ; to add " reasonable, practical and " after " the most " ; to delete " in - situ, including proper adjustments to the current works projects and designs of future projects to avoid damaging the existing structure of the queen s pier " after " preserving the queen s pier " ; and to delete " of works projects on the present site of the queen s pier " after " minimize the impact " and substitute with " on the central reclamation phase iii works which are underway, and to commence as soon as possible discussion involving public participation on the site and design concept for the relocation of the queen s pier "
在"鑒于"之後加上"近期"在"社會各界"之後刪除"已經"在"強烈關注， "之後刪除"為有效保護" ，並以"以及就政府提出處理"代替在"皇后碼頭"之後加上"的4個方案作出討論"在"立即"之後刪除"采納" ，並以"參考"代替在"中國文物古跡保護準則， "之後刪除"並承諾以原址保護減少干預保存原狀保護文物環境等作為準則， "在"盡速實施"之後加上"最合理可行及"在"最有效的"之後刪除"原址保留" ，並以"保存"代替在"皇后碼頭方案， "之後刪除"包括妥善調整現有工程及設計未來工程，以避免對皇后碼頭現有結構造成損害，從而將皇后碼頭現址因" ，並以"讓正在進行中的中環第三期填海"代替及在緊接句號之前加上" ，並就重置皇后碼頭的選址及設計意念盡快展開有公眾參與的討論" 。 -
Chapter 4 : the influence of different phase - shifting angle of reference wave in recording, of the phase - shifting error and of the quantization error on the quality of the reconstructed image is investigated respectively in two - step phase - shifting inline digital holography. and an effective method of eliminating the phase - shifting error is presented, in which the summation of the intensity bit errors of the reconstructed image is taken as an evaluation function for an iterative algorithm to find the exact phase - shifting value. the feasibility of this method is demonstrated by computer simulation
通過數值分析不同相移角的選取對再現像的強度誤差的影響，發現再現像強度誤差依賴于記錄時相移角的選取，當相移角在一定范圍內，其再現像的強度誤差相對較小；提出了一種有效消除相移誤差的新方法，並將其應用於二步同軸相移數字全息，對此進行了計算機模擬，得到了很好的結果，證明該方法對于相移誤差的消除是很有效的；對量化誤差所作的數值模擬發現，當信號被量化成8比特（ bit ） ，即256個灰度級以上，量化噪聲的影響相對較小。 -
Motion compensation includes range alignment and phase reference selection technology. frequency correction algorithm, spatial correction algorithm and envelope minimum entropy algorithm are respectively applied in range alignment. phase compensation is according to selection of the phase reference
2 、運動補償部分主要解決距離校正和相位基準選擇技術，距離校正分別採用了頻域校正法、空域校正法和包絡最小熵法，主要依據相位基準選擇的方法來進行相位補償。 -
The new algorithms for classification of mpsk, mask and mqam signals using cumulant invariants are proposed in gaussian noise and ideal communication channel environment. the new classification features are blind to unknown snr and reference phase
提出了在高斯噪聲和理想通道環境下，基於高階累量不變量特徵的mpsk 、 mask和mqam信號調制分類演算法，新特徵對信噪比和未知的參考相位參數是盲的。 -
A phase - locked - loop - based model reference adaptive system for speed estimation of sensorless induction motor drives
一種基於鎖相環原理的參考模型自適應感應電機轉速估計方法 -
The method established by the experiments not only gives mechanism of dymamics scour cd pipelines on the sandy bottom but also provides reference basis for concept phase design of sub - ses pipelines
由這項研究所建立的方法不僅給出了管道下砂基動態淘蝕的機理，而且可為海底管道的概念設計提供參考性依據。 -
A new cumulant based algorithm of estimating signal to noise ratio ( snr ) and reference phase is proposed for likelihood ratio classification of mpsk signals, which is blind to unknown phase order of mpsk signals. the asymptotic statistic distribution characteristics of cumulant function estimation of mpsk signals are given
針對mpsk信號似然比分類中的參數估計問題，提出了在未知調制類型的前提下，基於累量分析的（對調制類型）盲的信噪比和參考相位估計演算法，並理論分析了累量函數估計值的漸進統計分佈特性。 -
The deviation introduced by reference phase shifting errors on four - steps and five - steps algorithm are analyzed. based on the principle of phase algorithm, a novel compensation method of reference phase - shifting error is described for four - steps algorithm and the five - steps algorithm. the theoretic analysis and data simulation indicate that the phase deviation arising from the first and the second harmonic reference phase - shifting errors can be eliminated using this method
在研究相位偏移干涉測量技術基礎上，重點研究了五幅演算法計算精度及移相誤差對計算結果的影響；提出了四幅演算法及五幅演算法移相誤差補償方法，理論分析及模擬模擬結果顯示，該方法可以補償移相過程中一階移相誤差及二階移相誤差對相位偏移干涉測量精度的影響。
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