amplitude frequency characteristic 中文意思是什麼

amplitude frequency characteristic 解釋
振幅頻率特性
  • amplitude : n. 1. 廣闊，廣大。2. 豐富，充足。3. （思想的）廣度。4. （天體出沒時偏離正東或正西的）角度距離。5. 【物，電】振幅。
  • 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。
  • characteristic : adj 有特性的；表示…特性的，…特有的。 Japan s characteristic art 日本特有的藝術。n 特性，特徵，性...
  1. We acquired the system ' s dynamic response when the satellite attitude was adjusted and the mode of the antenna. then modal analysis and dynamic analysis have been done to the satellite - antenna system by using the finite element analysis ( fea ) software of ansys. through the analysis we got the system ' s connatural characteristic, the amplitude - frequency characteristic of harmonic response, the power spectrum density of random vibration response, the maximal amplitude and resuming time of impact response

    其次藉助ansys有限元分析軟體，對系統進行了模態分析和動力學響應分析，獲得了不同天線結構參數下的衛星?天線系統的固有特性，簡諧響應的幅頻特性，隨機振動響應的功率譜密度，以及沖擊響應的最大幅值和恢復時間等。
  2. The traditional analog frequency - sweeping instrument, which mostly uses the lc circuit as the frequency oscillator, is more expensive, too much bigger and heavy to carry. it can only display the curve of amplitude - frequency, but ca n ' t used to measure the phase - frequency, and ca n ' t used to print the curve of frequency response characteristic either. it brings many discommodity to the user

    傳統的模擬式掃頻儀大多是用lc電路構成掃頻振蕩器，它不僅價格昂貴，體積龐大，而且只能顯示幅頻特性曲線，不能得到相頻特性曲線，更不能列印被測網路的頻響曲線，給使用者帶來諸多不便。
  3. The other research purpose is to discover characteristic information and reliable methods of reflecting spinal cord damage. due to typical damage indicators, amplitude and latent period, have bugs such as limited information and weak stabilities, this project recommends applying time - frequency analysis to monitoring spinal cord function. through analysing and comparing typical signal with stft and cwt, it is proved indicators under time - frequency distribution can be better in reflecting signal changes, espcially the wavelet transformation

    針對目前ep監測中判定脊髓損傷的指標（波幅和潛伏期）存在信息量相對較小、穩定性較差的缺陷，本課題提出利用時頻分析技術對術中脊髓功能監護進行研究，通過短時傅立葉變換和小波變換分析和比較典型信號的時頻分佈，證明時頻特徵參數能更有效的提取信號的變化信息。
  4. Development of portable instrument for amplitude - frequency characteristic

    便攜式低頻幅頻特性測試儀的研製
  5. We discussed the main characteristic parameters of seismic kinesiology and dynamics of mine engineering fracture zone, including relative amplitude, phase time of wave crest, similarity factor, principal frequency band energy, 3 - d space time gradient and coherent coefficient et al., and puts forward the processing method of 3 - d seismic characteristic parameters about denoise - smoothing, generalization, correlation analysis, characteristic transformation ; and presents the method of pattern recognition of mine engineering fracture zone

    摘要本文從時間域、頻率域、三維空間域介紹了礦山工程裂隙破碎帶主要的地震運動學、動力學屬性參數，包括相對振幅、波峰相位時間、相似系數、主頻帶能量、二維空間時間梯度和相干系數等，提出了礦山工程裂隙破碎帶三維地震屬性的去噪平滑、歸一化、相關分析、特徵變換的處理方法以及裂隙破碎帶的模式識別原理與方法，並用實例說明了該方法的應用效果。
  6. It was demonstrated that this sort of load - control apparatus has superior performance. we used a electric transmitter as the transducer to collect the sound signal, using the daq toolbox of the matlab to achieve the collection of the sound signal, and using the dsp toolbox of the matlab and the sound - launch technology to analyze the time - domain characteristic and the frequency - domain characteristic of the signal, chiefly analyze its short - time average amplitude, its short - time over - zero ratio and its estimate of the power chart and the average - period chart

    實驗中使用了駐極體話筒作為球磨機聲音拾取傳感器，利用matlab中的數據採集（ daq ）工具箱實現對磨音的採集，利用matlab信號分析（ dsp ）工具箱和聲發射技術對磨音進行時域和頻域分析，主要分析磨音的短時平均幅度和能量、短時平均過零率、功率譜估計和平均周期圖。
  7. We give ptr ' s amplitude and phase signal of one dimension based on the theory of ptr, discuss the ptr ' s signal ' s frequency characteristic, and a method for measuring thermal diffusivity of opaque materials is introduced. then, we study on anisotropic materials " thermal conductivity, the temperature field and thermal conductivity tensor of anisotropic materials is theoretically deduced from the theory of ptr, and is proved by the experiment

    從光熱輻射理論出發，推導出一維情況下ptr信號的振幅和位相表達式，討論了光熱信號的頻率特性，介紹了一種用ptr技術測量不透明材料熱擴散系數的優化方法；接著研究分析了各向異性介質受調制激光束輻照下產生的光熱信號，在理論上推導出各向異性介質的溫度場以及熱導率張量並給予一定的實驗驗證。
  8. The device is also widely used to measure the amplitude frequency characteristic of instrument in the tv - broadcastiong field, such as filter, amplifer, ect

    該儀器主要針對高頻調諧器的測量，也可用於廣播電視領域中濾波器件、放大電路等的生產測試。
  9. Scalar network analyzer is a kind of intelligent instrument based on frequency sweep test technology that used to measure the amplitude - frequent cy characteristic of linear system. network analyzer adopt these new technology such as frequency synthesis, sampling technique, broad - band sweeping and computer - assisted testing

    標量網路分析儀是一種基於掃頻測量技術，用於測量線性系統幅頻特性的智能化儀器。網路分析儀結合了頻率合成技術、采樣技術、寬帶掃頻技術、計算機輔助測量等新技術。
  10. In this topic, the error characteristic of resistance voltage sensor was analyzed in theory, by using electric circuit analysis, the reasons which affected its error were gotten. based on theory analyses, initial structure was designed. then by using fem ( finite element method ) of simple resonance field, several structures electromagnetic field was calculated, and their amplitude errors, phase errors, maximum of electric field intensity and frequency characteristic of amplitude error were contrasted

    本文從理論上分析了電阻式電壓傳感器的誤差，用電路分析法定性的研究了影響電阻分壓器誤差的因素；在理論分析的基礎上進行了電阻分壓器結構的初步設計；基於該設計，利用簡諧場的有限元方法進行了場的計算，比較了幾種結構方案的幅值誤差、相角誤差、最大場強值及其幅值誤差的頻率特性，從而得到一種最優方案；製作了分壓器樣機，並在本實驗室進行了實驗；最後，對電子電路部分進行了初步設計，並提出了抗干擾的措施。
  11. Ds signal is twice modulated with the rapid pseudorandom noise sequence and the carrier. so it appears cyclostationary. in the field of spectral correlation, ds signals appears its characteristic as fallows : for the amplitude of spectral correlation, the information of carrier frequency and pn code rate are contained on the spectrum frequency equal to zero sheet, and also the pn code rate is contained on the sheet of spectrum frequency equal to carrier frequency ; for the phase of spectral correlation, the information of carrier initial phase is contained on the sheet of cyclic frequency equal to double carrier frequency

    Ds信號是經過高速偽隨機序列和正弦載波二次調制的寬帶信號，因此具有周期平穩特性，它在譜相關域表現為:幅頻特性在譜頻率等於零截面切片上包含了載頻和偽碼速率信息特徵，在譜頻率等於載頻截面切片上包含了偽碼速率信息特徵;相頻特性在循環頻率等於兩倍載頻截面切片上包含了載波初相信息特徵。
  12. This paper presents a model of cosine basis functions neural network based on bp algorithm, discusses the relation between the algorithm of neural network and amplitude - frequency characteristic about the linear phase fir filter, introduces the convergence condition of neural network algorithm, and studies the optimal design example about the high - order fir double - band - pass filters

    提出了一種基於bp演算法的正弦基函數神經網路模型及演算法的收斂條件，研究了該神經網路演算法與fir線性相位濾波器幅頻特性的關系，給出了高階雙通帶濾波器的優化設計實例。
  13. With the speed increment, not only 1 / 2x and 2 / 3x frequency component appear in low frequency segment, but also 4 / 3x frequency component begin to appear in high frequency segment. the amplitude of fraction frequency is usually larger than that of multiple frequencies. the nonlinear characteristic of torsion for rubbing rotor is similar with that of flexural vibration completely

    研究結果證實了扭振特徵和非線性特性用於該類故障診斷的可行性：從發生碰摩起，扭振分頻和倍頻相伴出現，轉速較低時， 1 / 2x成分突出，隨著轉速升高，不但有1 / 3x及2 / 3x分量出現，而且出現了4 / 3x成分，分頻幅值大於工頻及倍頻；彎振和扭振的非線性運動特性完全相似，扭振有抑制轉子系統復雜運動的能力。
  14. In the design of hardware, frequency sweep signal is based on dds + pll. by the control the singlechip c8051f060, ad9852, the dds chip, can achieve stepped frequency signal. with amplifying and detector circuits, the instrument can achieve the measurement and receiving of amplitude frequency characteristic result. by means of pdiusbd12 finish the usb1. 1 protocol conversion, communicate with usb interface of pc, the instrument give the measurement resul of amplitude - frequency characteristic in lcd of pc

    硬體方面，掃頻信號源基於dds + pll的技術，由c8051f060單片機控制dds晶元ad9852實現頻率步進。再加上外圍放大、檢波等電路，測量和接收幅頻特性。並藉助于pdiusbd12完成測量數據usb1 . 1協議轉換，實現與pc機的usb介面通信，將幅頻特性測量結果在pc機的液晶顯示屏上表達出來。
  15. The rigid and flexible trusses were simulated respectively. the dependences of the attitude angle degree and angle velocity of the spacecraft on the rigid and flexible situation in the deployment process and drive velocities loaded on the joints were derived. the frequency - amplitude characteristic curves were gained from the attitude angle velocity curves of the deployment of the flexible truss and locked flexible truss after deployment through the fast fourier transition ( fft ) method

    文中給出了展開前後的動力學固有特性;對展開過程中分別為剛性桁架和柔性桁架兩種情況進行了模擬計算，對比了兩種情況的桁架展開過程中衛星姿態角及姿態角速度的變化;比較了柔性桁架不同展開速度對衛星姿態角及姿態角速度的影響;分析了柔性桁架展開過程對衛星非展開方向的姿態角度及角速度的影響及原因;對柔性桁架展開過程中及展開鎖定后的衛星姿態角速度的變化曲線進行快速傅立葉變換，得到柔性桁架展開過程即展開鎖定后衛星姿態角速度的頻幅特性曲線。
  16. Amplitude - frequency response characteristic

    幅頻特性
  17. Three characteristic features, such as average velocity of sound, deviation coefficient of sound velocity, and deviation coefficient of amplitude are extracted from four kinds of testing data which are sound velocity, amplitude, frequency and waveform in this paper. fuzzy analysis and artificial neural network are combined to form an intelligent system with similar functions to human brain to classify grc, aerated concrete, hollow brick, solid brick and concrete block. the accuracy of this system is up to 95 % in field tests

    由超聲脈沖法獲得4種檢測信息聲速、波幅、頻率和波形，從中提取3個特徵量：平均聲速、聲速的離差系數和波幅的離差系數，利用模糊分析方法和人工神經網路相結合對grc 、加氣混凝土、空心磚、實心磚、砌塊5種墻體材料進行種類識別，形成一個智能化的、具有類似人腦功能的系統.經現場實測證明，判別的準確率達95 %以上。
  18. It can be used to measure the amplitude - frequency characteristic and phase - frequency characteristic of the unknown network, and give the real - time the transmission - characteristic measurement of the unknown network

    運用掃頻技術的頻率特性測試儀可以對被測網路進行快速的動態測量，得出被測網路傳輸特性的實時測量結果。
  19. In a first approximation, the departure from a constant amplitude vs frequency characteristic will be a characteristics with a linear slop that will vary with time

    採用一級近似，則可認為對頻率特性曲線的等幅偏移是一具有時變線性斜率的特性曲線
  20. Amplitude frequency characteristic

    振幅頻率特性
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