repeat frequency 中文意思是什麼
repeat frequency
解釋
重復頻率-
Adjusting digital potentiometer in controlling circuits of sps and capacitor charging and discharging circuit separately with industry control computer ( icc ), the peak value and repeat frequency of output pulse can be adjusted separately. controlling relays to choose different capacitors with icc, the width of output pulse can be adjusted
利用工控機分別調節開關式穩壓電源控制電路和電容充放電控制電路中的數字電位器，就能分別調節輸出陡脈沖的幅值和重復頻率；利用工控機控制繼電器選擇不同的充放電電容，就能調節輸出陡脈沖的脈寬。 -
1 ) the ground clutter is very strong when radar works in its down - look mode. 2 ) the clutter has the character of space - time coupling and the clutter spectrum spreads due to the movement of platform. 3 ) the lower repeat frequency results in doppler blur and the clutter spectrum spreads in the whole doppler domain
地面動目標檢測的最大難點： 1 ）雷達下視時地雜波特別強; 2 ）由於平臺運動，地雜波存在著空時耦合，雜波譜展寬； 3 ）為避免距離模糊，採用較低的重復頻率，但會存在多普勒模糊，地雜波譜擴散到整個多普勒域。 -
Radar altimeter is a kind of very important microwave sensing instrument for observing the earth, and there are a lot of key technologies involved in the high resolution spaceborne radar altimeter ( hrsbralt ). the principle of hrsbralt, the acquisition and track methods, the if simulation, the closed loop internal calibration method, the pulse repeat frequency ( prf ) design, and the ocean - land compatible altimeter design are studied in this dissertation
雷達高度計是一種重要的微波遙感儀器，本文就高解析度星載雷達高度計的工作機理、跟蹤方法、大時帶積在軌閉環內校準以及海陸兼容等內容進行了深入的研究，具體包括以下八個方面的內容： （ 1 ）深入研究了星載雷達高度計的工作機理，並對典型雷達高度計系統進行了分析。 -
Some functional blocks are set up with the basic block provided by spw, and some is programmed with c language. after the simulation of pulse compress mtd radar, the effect of some jamming signals is analyzed. especially, the jamming signal of high pulse repeat frequency is discussed
完成脈沖壓縮mtd雷達的建模以後，又討論分析了幾種常見的干擾式樣，如噪聲調幅干擾、噪聲調頻干擾等，著重討論了高重頻噪聲調頻脈沖信號的干擾效果，並對幾種不同形式信號的干擾效果進行了比較和分析。 -
Based on the requirement and target of the projects, firstly, pcf bragg grating are investigated theoretically and experimentally. moreover, the effects of filling high refractive index material ( nematic liquid crystal, nlc ) in pcfs on the transmission mechanism and propagation properties are studied by using plane - wave method and finite - element method ( fem ), farther, several novel pcfs are proposed and designed. lastly, we propose and demonstrate a clad - pumped er3 + / yb3 + - codoped fiber laser, which integrate all performances of broad - band tunable wavelength, uniform output power spectrum, high repeat frequency and high average power to together
本論文選題于國家973 、 863以及國家自然科學基金等項目，結合課題的要求和主要目標，在對光子晶體光纖（ pcfs ）傳輸特性研究的基礎上，首先對光子晶體光纖光柵進行了理論和實驗研究;然後，採用平面波展開法和有限單元法分析了在光纖的空氣孔中填充高折射率液晶對光纖傳導機制和傳輸特性的影響，提出並設計了幾種新型光子晶體光纖;最後，提出並研製成功連續可調諧、輸出功率譜均衡的全光纖化、高功率包層泵浦鉺鐿共摻光纖激光器實驗樣機。 -
Based on a quasi - static test of two - lay - three - story concrete - filled rectangular steel tubular frame ( crstf ), ductility behavior, dissipation of seismic energy, degeneration of stiff and intensity of the crstf under low - frequency, horizontal, repeat load are analyzed. hysteretic curves to each floor of crstf between displacements and repeat loads, together with corresponding framework curve and resilience model to top floor of crstf is shown, too
本文基於一榀三層兩跨方鋼管混凝土框架擬靜力試驗，分析了低周反復水平荷載作用下框架的延性性能和強度與剛度的退化以及抗震耗能能力，給出了框架各層位移隨反復荷載變化的滯回曲線，並根據頂層滯回曲線進一步得出了框架頂層骨架曲線及相應的恢復力模型。 -
These parameters include bandwidth, carrier frequency, signal duration and signal repeat frequency. according to the parameters, we select the method direct reading the stored digital waveform to realize the waveform generation in the third part, the waveform generator system control including communication control, timing control and address generation is designed
第二部分研究了線性調頻信號參數間的內在聯系，包括信號帶寬、中心頻率、持續時間及重復頻率等，設計了信號參數，並在前人研究的基礎上選擇了波形存儲直讀法作為信號產生方案。
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