difference frequency 中文意思是什麼
difference frequency
解釋
訊差頻率- difference : n. 1. 差異，差別。2. 不和，爭論。3. 【數學】差，差額。4. 【邏輯學】特殊性。vt. 〈罕用語〉區別，使有差別。
- frequency : n. 1. 屢次，頻仍，頻繁。2. （脈搏等的）次數，出現率；頻度；【物理學】頻率，周率。
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It also evaluates the performance of frequency difference estimation of afc
分析了多徑條件下afc頻差估計的性能。 -
The methods of direct measurement with low precision such as frequency and time interval methods and the methods of indirect measurement with high precision such as beat frequency method, dual mixer time difference method and frequency difference multiplying method are supported on the platform. the fundamentals of each method are studied. the quantization error is analysed and the illustration is given for each method
該平臺支持直接頻率和時差法兩種較低精度的測量方法以及雙混頻時差法、差拍頻率法和頻差倍增法高精度的簡接測量方法，本文研究了各種測量方法的原理，對各種測量方法的量化誤差作了分析，並給出具體的實例。 -
Third, according to an example, the influence on soil displacement stress etc under harmonic vibration load induced by infiltration coefficient and loads frequency variation is studied numerically in dissertation. finally, the difference of layered saturated soils consolidation between rectangle and harmonic vibration loads is studied in this dissertation
再次，以數值方法研究了簡諧荷載作用下成層飽和地基二維biot固結的一般規律，同時還研究了固結情況受滲透系數，頻率等參數影響的規律。 -
The ring laser gyro ( rlg ) is a new photoelectric inertia sensor based on the optic interference theory. it uses the difference between the frequency of the two beams of light, which run in the opposite direction in the resonant cavity, to measure the carrier ’ s rotate speed and the orientation in the inertial space
環形激光陀螺儀（ ringlasergyro ，簡稱rlg ）是以光學干涉原理為基礎發展起來的新型光電慣性敏感儀器，它利用環形諧振腔內順、逆運行的兩束光的諧振頻率差來測量載體對于慣性空間的轉速和方位。 -
Photographic sound record ; difference frequency method for measurement of non - linear distortions
攝影錄音.測量非線性失真的差頻法 -
In this paper, porous nanocrystalline titanium dioxide films were used to modify the surface of quartz crystal microbalance ( qcm ), the response of qcm with high roughness layer hi liquid phase was discussed, and the difference between the theoretic value and frequency response measured was illustrated in detail
本文採用tio _ 2納米粒多孔膜修飾壓電晶體傳感器，對高粗糙度壓電傳感器的響應進行了探討，闡明了在液相中壓電響應的實際值與理論值產生偏差的主要原因。 -
The specific research methods are listed : 1. matched filter taking the max ouput snr as the best rule correlates nonstop divided signal and divided echo to detect low snr target signal. then all one dimension divided correlation outs and done fft in portrait to leach interferential signal such as static or low rate mussy meaves, many pathway echo and so on and to take target ' s time difference and doppler frequency that combine parameters that target ' s direction taken from antenna and so on to implement target ' s orientation and tracking
具體研究方法如下： 1 、採用以輸出信噪比最大為準則的最佳匹配濾波器來對分段的參考和目標信號作相關處理來檢測低信噪比目標信號，然後對一維分段相關輸出組作縱向傅立葉變換來濾除靜態或低速的雜波、多徑回波等干擾信號，並提取目標的時差和多普勒頻率，再結合由天線獲得的目標方向等參數，就可以實現目標的定位和跟蹤。 -
Minus means that space - time circular frequency has a reverse direction to particle wave or the phasic difference between two circular frequencies is
式中負號表示時空偏轉圓頻率方向與波粒子的波函數圓頻率 -
Third, other nuclear quanlities ( such as fission caused by slow neutron, odd - even difference of frequency of bandcrossing etc ) were researched briefly, no other than pairing correlation, their results represented a series of odd - even differences
（ 3 ）對原子核的其它性質（如慢中子引起的裂變，帶交叉頻率的奇偶差等）的奇偶差也作了簡要的研究，正是由於對關聯的存在，其他性質也表現出一系列的奇偶差。 -
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。 -
The short - baseline interferometer ’ s angle measurement accuracy is influenced by phase difference measuring accuracy, the base length measuring accuracy, the system operating wavelength ( frequency ) and so on, the article analyzes the existing theory, and emphatically analyzes the influence of base length measuring accuracy to the precision of angle measurement
短基線干涉儀測角精度受相位差測量精度、基線長度測量精度、系統工作波長（頻率）測量精度等因素的影響，文中，在對原有理論進行分析的基礎上著重分析了基線長度測量精度對系統角度測量精度的影響。 -
An empirical analysis is made with the population data of the us cities to verify the theory and models developed in this paper, which will contribute to reconcile the apparent difference between the hierarchical step - like frequency distribution of city sizes suggested by central place theory and the smooth curve reflected by the work on the rank - size rule
多重zipf維數模型不僅可以有效地統一中心地的等級階梯與位序-規模法則反映的連續分佈，而且可以揭示城市體系演化的更多信息和隱含法則。以美國城市體系1998年的數據為實證對象，給出了城市規模分佈的多分維 -
Difference frequency distortion
差頻失真 -
There is difference frequency measurement requirement for every part of pid regulating, difference between dynamic quality and static quality in response time and accuracy. according to these, it use the interrupt functions and high - speed counter of the simens s7 - 200 plc cpu226 basic unit and some peripheral circuit to measure frequency ; in software designed, the procedure frame of hydraulic - turbine governor and disperse process of parallel pid are analyzed, an improved pid algorithm is adopted to realize a pid regulation mode with variable structure and parameters ; the mechanical liquid - pressure system of the hydraulic - turbine governor is with electric - hydraulic converter unit of step motor. according to the drive character of five phase of response step motor, a variable frequency regulated voltage driver unit is designed in order to realize interface between plc and driver of step motor
本文利用s7 - 200plc自身的特點設計了頻率測量單元，根據pid調節各個環節的特點，以及調速器動態特性、靜態特性對頻率測量的實時性和精度要求的不同，利用s7 - 200plc基本單元中內置的高速計數器以及相應的外圍放大整形、分頻電路，實現了水輪發電機組頻率的測量；在軟體上，對微機調速器的整個程序框架、並聯pid的離散化過程進行了分析，選用改進的pid演算法實現了變參數、變結構的pid調節模式；調速器的機械液壓隨動系統具有步進電機電液轉換元件，採用五相反應式步進電機，根據其驅動特性設計了變頻調壓驅動器，實現plc與步進電機驅動器之間數字介面。 -
( 4 ) preparation of sample of grain moisture measurement, design and implement of project, analysis of data which affect moisture measurement. the relationship of moisture, difference frequency, temperature and weight is pointed out
（ 4 ）糧食水分檢測樣本的制備，數據採集方案的設計及具體實施，最後通過對影響水分檢測各因素之間的數據分析，指出了水分與差頻、溫度、緊實度之間的關系。 -
The concrete design method of the votating speed difference frequency fuzzy controller is studied in detail. based on single - chip microcomputer 8031, using table look - up method, votating speed difference frequency fuzzy controller applied to induction motors is implemented. simulation result demonstrates that the control result for the producing plastic flat yarn of votating speed difference frequency fuzzy control to the speed of induction motors is idealer
本文對轉差頻率模糊控制器的具體設計方法進行了討論：以單片機為核心，用查表法實現異步電動機轉差頻率模糊控制；最後，結合工廠塑料平膜拉絲機驅動電機參數對系統進行了模擬，分析了轉差頻率模糊控制對異步電動機轉速的控制效果，結果是比較理想的。 -
This paper studies and designs a variable frequency speed regulation system applied to induction motors by means of votating speed difference frequency fuzzy control. the general scheme of the system is presented. circuits and software are designed for the major parts of the system such as constant magnetic linkage control frequency converter and votating speed difference frequency fuzzy controller
本文對異步電動機轉差頻率模糊控制變頻調速系統進行了較為詳細的研究和設計，給出了系統的總體方案。對于系統的主要組成部分? ?恆磁鏈控制變頻器和轉差頻率模糊控制器進行了設計。 -
At present, ktp has been widely used in second harmonic generation ( shg ), sum ( difference ) - frequency mixing, optical parametric oscillators ( opo ) and optical parametric amplification ( opa )
目前， ktp已作為一種商業化的晶體廣泛應用於中小功率固體激光器的倍頻（ shg ） 、和（差）頻、光參量振蕩（ opo ）和放大（ opa ）等。 -
( 2 ) hardware design of difference frequency capacitance measurement circuit, including the structure of sensor, analysis on several relative measurement circuits, periphery circus design. debugs and practically measures it
（ 2 ）進行了差頻式電容測量電路的硬體設計，主要包括：傳感器結構設計，各種微小電容檢測電路的對比分析，差頻式檢測電路設計，溫度檢測電路設計以及存儲電路設計。 -
In this paper, author goes deep into analysing dielectric property of grain in theory, and brings forward a difference frequency capacitance measurement method based on the analyse of several micro - capacitance measurement methods. at the same time, a mathematics model of moisture measurement is given, which depends on data merging surround moisture, difference frequency, temperature and weight by multi - element regression
在本次畢業設計中，作者對此進行了較為深入、系統的研究，從理論上分析了糧食的介電特性，在對比分析了幾種微小電容測量方法的基礎上採用了差頻式電容測量方法，並採用多元回歸分析法對水分、差頻、溫度、重量四種測量數據進行了數據融合，提出了糧食水分測量的數學模型。
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