群變頻器 的英文怎麼說
中文拼音 [qúnbiànbīnqì]
群變頻器
英文
groufrequency converter-
But elevator suo by means of yi frequency changer, request by far to kao, also all yi hat, necessitate ask for has ranking brain trust and male thick bankroll make out shield, then can attainment these mission, for reach bourne no cherish go over huge money
但是電梯所用之變頻器，條件要求甚高，亦是所有之冠，必須要有超群的智囊團及雄厚的資金做後盾，才可達成這個使命，為達目的不惜投入巨資Scrambler - a device that electronically alters a program signal so that it can be seen only by persons, typically paid subscribers, with appropriate decoding, or " descrambler " devices
擾頻器-此電子設備可以改變一個節目的信號，只有在正確的解碼或安裝正確的裝置時，才能被特定人群收看，特別是付費訂戶。The full automatic mechanical arm is built for letoff and wrap - up systems. the extruding quantities of each unit are controlled by frequency motor, the forming system adopts the synchronous group control. the digital displays are used for letoff, wrapup, extruding, drawing, line speed and meter recording
放卷、收卷設置機械手全自動控制；各組擠出量由變頻器控制電機來完成，成型系統由一臺變頻器群控三臺成型牽引電機，與機械配合達到同步，該設備的放、收卷、擠出、牽引、線速、計米全部由數字化顯示。Introduction and analysis of methods of measuring the group delay of frequency - translating devices
頻率變換器件群時延測量方法的探討與分析While the all - pass network for equalizing improves the precision of signal transmission. at last the circuitry realization ? some test data and trouble shooting are presented. the measure results are much better than the product of the other institute
下變頻系統的群延遲均衡器，採用全通網路電路來實現，採用ansoft的serenade軟體對其進行模擬與優化，該設計提高了系統傳輸信號的準確度。The converter mainly accomplishes changing the c - band rf to intermediate frequency 70mhz, amplifying and gaining. the thesis includes r & d of local oscillator and group - delay equalizer. the thesis overall views the historical development future trend, introduces the theories, applications and characteristics
該變頻器主要完成雙通道c頻段射頻信號到70mhz中頻的變頻、放大和增益控制等功能，本文的主要工作是下變頻器中的本地振蕩器和中頻群延遲均衡器兩部分的研製。By new the vector - mixer calibration technique has bees teed in our project, the test results show that vector - mixer slaved measuring absolute group delay of frequency converters successfully
矢量混頻器技術已在工程中應用，測試結果表明，矢量混頻器技術較好地解決了變換鏈路絕對群時延的測量。The definition and measurement techniques for group delay has been described and analysed in this paper, the new techniques, being called dine - mixer technique and vector - mixer calibration for measuring the absolute group delay of the frequency converters has been researched and analysed in detail also in this paper
摘要描述和分析群時延的含義和測量方法，著重研究了變頻鏈路絕對群時延的測量方法，對三混頻器和矢量混頻器技術進行了詳細分析和論述。In the fifth chapter, a new fully differential operational amplifier with voltage and current - mode negative feedback has been proposed, which can stabilize its quiescent operation point, using the characteristic of mos transistors which operate in the triode region acting as active variable resistor, a fully differential fourth - order chebyshev low - pass filter with tunable frequency and bessel low - pass filter with accurate group delay based on r - mosfet - c and operational amplifier has been designed
第五章：提出了一種新的既具有電壓共模負反饋又同時具有電流共模負反饋的全差分運算放大器電路，能較好地穩定電路的靜態工作點，並應用mos管工作在線性區可作有源可變電阻用的特性設計得到了截止頻率可連續調節的高性能r - mosfet - c 、運放結構切比雪夫（ chebyshev ）和精確群時延值貝塞爾（ bessel ）低通濾波器。The accurately controlled signal source generates sinusoidal elastic wave accurately controlled in frequency and stable in phase to " illustrate " underground media. time signal stacker receive signal by stacking and doing fft to measure the transfer function of media. " sompi " cepstrum method retrieve group velocity travel times and decayed factors of wave element from observational data of transfer function in a limited frequency window
精密可控震源用於產生頻率精確相位穩定的正弦彈性波以照射地層內部，信號疊加器通過對接收信號進行疊加和進行傅立葉變換的方式實現對介質傳遞函數的精密測量， 「存否」倒譜方法能夠根據一段窄帶頻域傳遞函數數據獲得時域上各個波成分的群速度傳播時間和介質衰減因子。分享友人