頻譜分析電路 的英文怎麼說

中文拼音 [bīnpǔfēnxīdiànlù]
頻譜分析電路 英文
spectrum analyzer circuit
  • 頻 : Ⅰ形容詞（次數多） frequent Ⅱ副詞（屢次） frequently; repeatedly Ⅲ名詞1 [物理學] （物體每秒鐘振動...
  • 譜 : Ⅰ名詞[書面語]1 （按類別或系統編成的書或冊子等） table; chart; register 2 （指導練習的格式或圖形）...
  • 分 : 分Ⅰ名詞1. （成分） component 2. （職責和權利的限度） what is within one's duty or rights Ⅱ同 「份」Ⅲ動詞[書面語] （料想） judge
  • 析 : Ⅰ動詞1. （分開; 散開） divide; separate 2. （分析） analyse; dissect; resolve Ⅱ名詞（姓氏） a surname
  • 電 : Ⅰ名詞1 （有電荷存在和電荷變化的現象） electricity 2 （電報） telegram; cable Ⅱ動詞1 （觸電） give...
  • 路 : 1 （道路） road; way; path 2 （路程） journey; distance 3 （途徑; 門路） way; means 4 （條理） se...
  • 頻譜 : frequency spectrum; frequency content; spectrum; power density spectrum; power spectrum; [系統] s...
  • 電路 : [訊] circuit （ckt）; electric circuit; electrocircuit電路板 circuit board; 電路保持 guard of a c...
  1. Based on the character of ultrasonic spectrum analysis, considering the affection of the circuit responsion of checking system, coupling state, position of checking transducer, this thesis established reasonable ultrasonic spectrum analysis method. using this method, several kinds of linear spectrum ( such as phase amplitude spectrum, phase power spectrum ) were researched and discussed

    本文根據超聲波頻譜分析的特點，綜合考慮了檢測電路響應、耦合狀況、探頭位置等因素的影響，制定出了一套合理的超聲波頻譜分析方法，並用此方法對幾種線性譜（如相位幅度譜、相位功率譜等）進行了研究和探討。
  2. The potential applications of amr include both civil and military communication, especially non - cooperative communications and communication confrontation, such as identifying signals, supervising signals, distinguishing interference, electronic confrontation, analyzing military threat, etc. on the basis of our analysis to the existing research on feature abstraction, the related feature abstraction methods are optimized in this paper, resulting several effective methods such as the feature abstraction based on transformation domain, stepped voltage level analysis, normalized carrier - free spectral energy analysis, squared signal and fourth powered signal analysis, etc. both the decision theory based on recognition algorithms and the artificial neural network ( ann ) based on recognition algorithms is analyzed, and the former is selected as it is more appropriate for this research

    調制類型的自動識別廣泛應用於民用通信與軍用通信，尤其是對于非合作性通信、通信對抗，比如：信號確認、信號監控、干擾辨識、電子對抗、軟體無線電、電子救援、通信對抗、軍事威脅分析等。本論文在分析現有研究的基礎上，借鑒了已有的特徵提取方法，對相關調制類型特徵提取方法進行了優化，使用了一些有效的方法，如基於變換域特徵提取方法、梯層電平分析方法、剔除載波后的歸一化頻域能量分析方法、信號平方后的頻譜分析方法、信號四次方后的頻譜分析方法等。通過對基於決策理論和基於人工神經網路兩種識別演算法進行分析，本論文選擇了較適合的基於決策理論的識別演算法。
  3. This paper mainly focuses on the noise limiting by means of the direct sequence spread spectrum ( dsss ) and the analysis of the transmission performance of the plc and some digital modulation technology. the contents of the paper is as follows : 1 ) the technical feasibility is proved after simulating noise limiting principle of dsss by means of systemview, the simulation software ; 2 ) a kind of band pass filter ( bpf ) is realized according to the requirement of filter and the principle of butterworth approximation, which satisfies the index of performance of dsss. 3 ) the low voltage plc system includes the sc1128, the specific modulation / demodulation ic, the bpf filter and other circuit components, furthermore, the control function of system is realized by means of the personal computer and the microcontroller

    本課題在對低壓電力線的傳輸特性和數字調制技術進行分析的基礎上，將通信理論中的直接序列擴頻技術（ dsss ）用於解決低壓電力線通信的干擾問題，主要研究內容如下： （ 1 ）用通信模擬軟體systemview對dsss技術的通信和抗干擾原理進行模擬分析，分別對時域和頻域下採用dsss技術前後接收信號的頻譜進行分析，驗證dsss技術在本系統中的可行性； （ 2 ）由dsss技術對濾波系統的要求，根據濾波理論分析了巴特沃思型濾波器的逼近原理並設計了合適的濾波電路； （ 3 ）用調制解調晶元sc1128和自行設計的濾波器加之輔助外圍電路，構造出低壓電力線載波通信系統，並採用atmel公司的單片機設計了接收和發射電路的微控制器； （ 4 ）分別對採取抗干擾措施前後輸入和輸出信號進行對比實驗，並對結果進行分析，驗證了dsss技術對干擾信號的抑制作用。
  4. The equivalent - circuit parameters and resonant frequencies of the piezoelectric quartz crystal resonance, the value of half peak width of the electroacoustic conductance spectrum ( fg1 / 2 ) as well as the electrical double - layer capacitance were obtained and analyzed

    獲得並分析了pqc諧振等效電路參數、諧振頻率、電導譜半峰寬f _ （ g1 2 ）和雙電層電容，考察了電極界面發生的吸附動力學過程。
  5. Familiar with the application of equipment like spectrum, vna, etc

    熟悉電子通信領域常用儀器（頻譜儀，矢量網路分析儀） 。
  6. This article takes hanging off and wide fluctuation of transmition velocity of adsl as example, then analysis centers on the discerte multiple tone and the principle of channel load assignation. from analysis above article points out the root of adsl being sensible of noise signal. at last, reserches effects that window function and barrier effect on frequency and adopts fft to work out the noise power of adsl

    本文以電信現在推出的adsl傳輸中鏈路經常掉線和傳輸速率經常大范圍波動為例，重點分析了adsl所使用的dmt調制方式和注水演算法分配通道載荷方式原理，由此指出adsl對噪聲信號敏感的根源，在得到問題的根源之後，分析了窗函數和柵欄效應對頻譜的影響，採用fft方法計算adsl線路的噪聲功率譜，為adsl線路測試提供了可靠的理論依據。
  7. Is used with a spectrum analyzer or measurement receiver

    Hm6050 - 2電源阻抗穩定網路一般與頻譜分析儀或測量接收機一起使用。
  8. Finally, the headwaters of harmonic current and its harms to power system are discussed, the influences of harmonic currents to short - circuit verifying are analyzed, some parameters are gained according to the analyse on vibration spectrum of the electrodynamic stress

    最後，討論了電力系統諧波的產生原因及其危害，分析了電力諧波對短路動穩定校驗的影響，通過對含有諧波的短路電動力的頻譜分析，得到相應的動穩定校驗參數。
  9. Secondly, the following two subjects are discussed according to the calculation of short - circuit current : ( l ) to verify the dynamic stability condition of wires by using simulated annealing algorithm ( sa ), the paper calculates the maximum value of rectangle wires " short - circuit electrodynamic stress and gets the conditions of their having the maximum value. furthermore, some concerned data about the verifying of copper wires are given by analysing vibration spectrum of the electrodynamic stress ; ( 2 ) in order to get the heat withstand conditions of wires, the paper discusses some common calculation methods, and then tries to study the problem applying artificial neural network ( ann ) based on heat principle of metals. the model is shown to be feasible

    其次，在電路中短路電流計算的基礎上， （ 1 ）進行母線的短路動穩定校驗計算：採用模擬退火演算法（ sa演算法）計算了矩形母線短路電動力的最大值及其取極值的條件，獲得了更為一般的結果，進而通過短路電動力的頻譜分析，給出了銅質母線的有關短路校驗計算數據； （ 2 ）進行母線的短路熱穩定校驗計算：討論了熱穩定校校的幾種常用計算方法，從導體或電器的發熱機理出發，運用人工神經網路理論對母線的熱穩定問題進行計算，通過算例比較，證明該方法用於熱穩定計算是可行的。
  10. Technology of fine processing was firstly used to make the lsaw biosensor with dual delay linear style. then we developed the dual channels resonance circuit and used the labview software to record and analyze phase / frequency automatically. so the detection system of lsaw biosensor was constructed by combing all these components with network analyzer and computer

    方法: 1 .利用精細微加工方法制備雙延遲線型漏聲表面波傳感器，並自行開發研製自激式振蕩電路， labview相位、頻率記錄分析軟體，將它們與網路分析儀、頻譜分析儀及計算機聯用以構建lsaw生物傳感器檢測系統。
  11. Sample error probably caused from data collection circuit of rf virtual frequency spectrum analyzer instrument was emphasized, and some kinds of selectable resolution scheme were presented, then these schemes of advantages and disadvantages were compared and summarized by the way of theory analyse, matlab simulation and practice validate and so on, at last, the optimum scheme of rf virtual frequency analyzer instrument was decided and adopted

    重點對虛擬射頻頻譜分析儀中的數據採集電路可能造成的采樣誤差進行了分析，提出了幾種可供選擇的解決方案，經過理論分析、 matlab模擬和實際驗證等手段，對這幾種方案的優缺點進行了比較和總結，並最終確定了其中最適合虛擬射頻頻譜分析儀的方案。
  12. By analysis of the intermediate frequency signals which through eight antennae and receiver channels, eight channels radio spatial spectrum direction finding system can reach the purpose of finding radio direction

    八通道無線電空間譜測向系統通過分析經過八路天線和接收機通道以後的中頻信號達到確定無線電信號方向的目的。
  13. The recursive criterion of transient current protection based on mallat wavelet transform is presented in order to meet the real - time demands. the reserch shows deficiency existed in the prevenient principle of transient current protection, so a new improved scheme of transient current protection is proposed. the characteristics of transient protection at different bus distribution capacitance is also analysed in this thesis. the study shows that operate of transient protection is correct when the bus distribution capacitance change. other conclusion include : the trip of transient protection must be locked when the power circuit breaker of transimission line operated, because the trip is incorrect at this time ; the features of transient current and it ' s energy is different between the fault and thunder over - voltage in transimission line, and them can be identified ; the ratio of high frequency component of current in serise capaciters compensation line, svc and hvdc system is far little than fault transient current, so all of them do not affect the working of trasient current protection

    應用功率譜估計方法討論了故障高頻暫態噪聲信號在頻率軸上的分佈情況，利用功率譜分析結果實現的非參數化系統辨識方法研究了母線分佈電容對電流高頻暫態信號的衰減特性。論文的後半部分（第五，六，七章）著重分析了現有基於故障電流的暫態保護原理和判據存在的問題，提出了新的實現方案，並討論了暫態電流保護的運行性能。利用多分辨分析和小波分解快速演算法構成的遞推暫態保護判據，可以準確區分故障線路和非故障線路，實現超高速暫態電流保護，計算更為簡單方便，計算速度更快。
  14. The influences of bus - connected networks, different monitoring points, low voltage windings and types of neutral point grounding on the frequency responses of pd signals are analyzed which give suggestions for the selection of monitoring band and monitoring points and pd localization

    分析了繞組的外聯網路、不同的監測點、低壓繞組、中性點接地方式等對局放信號幅度、頻譜的影響，為局部放電在線監測頻帶、監測點的選擇以及局放的定位提出了具體的建議。
  15. Based the research on the laser beam drift feedback control technique, analysing the beam drift and its frequency components, a laser beam directional stability method is studied in the thesis in detail, with its measurement and control circuit system that combines the laser beam intensity modulation and the beam drift feedback control technique. in this method, at first the laser beam intensity is modulated with the acoustooptic modulator, then the lock - in amplifier is applied to detect and demodulate the modulating signal, at last a feedback control signal is generated by the dsp control circuit at last, including : 1

    本文在原有的激光光束漂移量反饋控制準直技術的基礎上，對光束漂移量信號的數據和頻譜進行了分析，重點研究了一種集聲光調制光強與光束漂移量反饋控制準直技術於一體的激光光束方向穩定方法及其測控電路系統，該方法通過聲光調制實現光強調制，接著通過鎖相放大電路檢測並解調調制信號，然後通過dsp控制電路進一步對光束的漂移量進行反饋控制。
  16. We take the peak current controlled dc / dc boost converter as an example. we compare and analyze power spectrum of input inductance current quantitatively of chaotic operation and periodic operation of converter. the computer simulation results demonstrate that power spectrum of input current has lower peak of power spectrum of chaotic operation than it of periodic operation, and then emi level is reduced

    以一個峰值電流控制dc dcboost型變換器為研究對象，在分析電路混沌現象的基礎上，分別對該電路工作于混沌和周期兩種狀態下的輸入電流頻譜進行了定量分析對比，證實了在相同輸出電壓條件下，工作于混沌狀態下電路輸入電流的頻譜與工作于周期狀態下電路輸入電流的頻譜相比，頻譜峰值減小，具有降低emi水平的效果。
  17. After collecting the characteristics of this signal in frequency domain, the samples are learned to train the constructed wavelet neural network ( wnn ) for realizing the mapping relationship between the fault and the spectrum characteristic, this method can be used for diagnosis of the unit faults efficiently

    在對水電機組振動信號進行頻譜分析后，提取該信號在頻率域的特徵量，將頻譜特徵向量作為學習樣本，通過訓練，使構造的小波神經網路能夠反映頻譜特徵向量和故障類型之間的映射關系，從而達到故障診斷的目的。
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