頻域模型 的英文怎麼說

中文拼音 [bīnxíng]
頻域模型 英文
frequency-domain model
  • : 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...
  • : 名詞(在一定疆界內的地方; 疆域) land within certain boundaries; territory; region
  • : 模名詞1. (模子) mould; pattern; matrix 2. (姓氏) a surname
  • 模型 : 1 (仿製實物) model; pattern 2 (制砂型的工具) mould; pattern3 (模子) model set; mould patter...
  1. A frequency domain ici mathematic model for ofdm systems

    載波間干擾的數學
  2. For micro - cavity semiconductor laser, station model is proposed in this paper and its steady - state and instantaneous characteristics when the coupling efficiency of spontaneous emission into a lasing mode is equal to 1 are analysised. for current noise, sp noise, noise, p noise, as well as current modulation, sp modulation, modulation and p modulation, using small - signal approximation, we derive the laser ' s corresponding transfer functions. and we calculate their signal - to - noise ratio ( snr ) gain in various parameters through frequency domain analysis in the premiss of large input snr

    本文對于微腔半導體激光器,提出站,能夠較直觀簡潔地分析微腔半導體激光器的穩態和瞬態特性,利用此對具有重要實用價值的= 1的微腔半導體激光器進行了討論;對于電流i噪聲、自發發射壽命_ ( sp )噪聲、自發發射因子噪聲、光子壽命_ p噪聲,以及電流調制、 _ ( sp )調制、調制、 _ p調制,在小信號近似下,得到了相應的激光器的傳遞函數;在大信噪比的前提下,對激光器進行了分析,分別計算了它們在不同參數下的信噪比增益,分析了其抗噪聲性能。
  3. This paper starts the research of the liquid floated pendulous accelerometer testing system according to the engineering. at first, this paper gives the brief introduction of the history and present status of accelerometer and its testing technology, the working principium and math model of the liquid floated pendu - lous accelerometer, and then, decides the binary width pulse force retrim loop as the design proposal of testing system, researches the transfer function of every part in the system emphasizly, analyses the stability of the whole accelerometer testing system from the angle of control theoretics by the open loop transfer function of system, and designed the correcting net, analyses the basal problems such as resolution, sampling restraint, precision and so on, designs the hardware testing circuits such as preamplification, band - pass filter, alternating amplifier, phase sensitive demodulatorn, pulse - width modulation, frequency scale circuit, moment current generator. finally, using the graphics program language labv - iew which is designed for testing field especially by ni accomplishes the solfware design of testing system, realized the testing functions

    首先對加速度計及其測試技術的發展歷史和現狀,液浮擺式加速度計的工作原理和數學等作了簡要的介紹,然後確定了以二元調寬脈沖再平衡測試迴路為設計方案,並從控制理論的角度進行了分析,著重研究了系統中各部分的傳遞函數,利用系統開環傳遞函數分析了系統的穩定性,同時設計了系統的校正網路;分析了二元調寬脈沖再平衡測試迴路的解析度、采樣約束以及測試精度等基本問題,並按照系統分析的結果設計了包括前置放大、帶通濾波、交流放大、相敏解調、脈寬調制、標電路以及力矩電流發生器等測試系統各部分硬體電路,驗證了電路的正確性,最後按照測試系統的要求,採用了美國ni公司專為測試領所開發的虛擬儀器工具? ? labview作為測試軟體開發工具,利用該圖形化編程語言完成了測試系統軟體部分的設計,實現了測試功能。
  4. The model - based parameter estimation ( mbpe ) is firstly applied to the near - field measurement in this thesis to deal with the near - field sampling data in space and spectrum domains respectively

    本文首次在天線近場測量中採用了基於的參數估計技術,在空內分別對近場采樣的數據進行處理。
  5. When catchment area, average channel gradient and catchment shape factor of designed culvert or bridge are known, a user can be convenient to get local parameters c, e and b from standard contour charts and easy to calculate flood flow just by a calculator. design period of flood flow is enormously shortened as well as a high precision. estimated flood flow through culvert or small bridge by new calculation model is generally less than by traditional methods, so that much cost is cut down a s reducing the span of culvert or small bridge

    以75000km ~ 2的川中丘陵地區為試點研究區,繪制了該地區新的參數等值線圖,率定了不同設計率的改正系數,使設計者只需在地形圖上獲取集水面積,河道平均坡降和流形狀系數,在參數等值線圖上查得橋涵所在地的相應參數,使用計算器即可迅速計算出設計流量,大大縮短了設計周期,且精度較高,設計的洪水流量一般低於傳統方法,從而可減小橋涵跨徑,節省投資。
  6. Frequency domain model reduction method

    頻域模型降價法
  7. Improving method for surface electromyography denoising based on wavelet transform

    基於網路的有源器件時有限差分建方法
  8. We adjust the strength of embedded watermark in according to the visual model in the ridgelet domain. experimental results show that our algorithm is very effective. performance improvement is obtained

    論文根據小脊變換中的視覺,按照小脊變換中計算出水印嵌入強度的權重,用擴的方法來嵌入水印信息。
  9. This idea was not invented whole cloth, of course ; there is a variety of research into language recognition differentiation, cryptographic unicity distances of english, pattern frequencies, and related areas, that strongly suggest trigrams are a good unit

    當然,這個想法不是憑空而來的;對于語言識別區分、英語的密碼唯一長度、率和相關領所進行的大量研究極力推薦將三元作為一個良好的單元。
  10. 5. a multivariable process identification based on asymptotic black - box theory is studied. firstly, a high - order mimo arx model and its frequency error bound is estimated from identification data and low - order siso models is obtained from high - order mimo arx model

    作者對一種基於漸近黑箱理論的多變量過程辨識方法進行了研究:首先用高階arx估計參數,並給出高階均方誤差;然後,對高階arx進行降階處理。
  11. The frequency analysis of the psychoacoustic model can give the inaudible, redundan elements of audio. in this paper we employ it to guarantee the inaudibility of the embedded watermark

    心理聲學的時分析主要用於音數據的壓縮編碼,這里主要考慮將其用於音水印演算法中去,以便從理論的角度來考慮嵌入水印的不可感知性。
  12. 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 )用通信擬軟體systemview對dsss技術的通信和抗干擾原理進行擬分析,分別對時下採用dsss技術前後接收信號的譜進行分析,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。
  13. Second part - the main contribution and research results of this paper are focused on as follows : ( 1 ) how to use the measurements of a dual frequency gps receiver to determine the ionospheric delay correction model for single frequency gps of a local range ; ( 2 ) how to separate the instrumental biases with the ionospheric delays in gps observation ; ( 3 ) how to establish a large range grid ionosphere model and use the gps data of chinese crust movement observation network to investigate the change law of ionospheric tec of china area ; ( 4 ) how to improve the effectiveness of correcting ionospheric delays for waas ' s users under adverse conditions. ( 5 ) how to establish the basic theory and the corresponding framework of monitoring the stochastic ionospheric disturbance using gps ( 6 ) how to improve the modelling ability of ionospheric delay according to its diurnal, seasonal, annual variations based on gps ; ( 7 ) how to meet the demand of correcting the ionospheric delay of high - precision orbit determination for low - earth satellite using a single frequency gps receiver 1 extracting ( local ) ionospheric information from gps data with high - precision the factors are systematically described and analyzed which limit the precision of using gps data to extract ionospheric delays

    二、具體研究工作的系統報告,主要集中在以下幾方面:研究如何利用單臺雙gps接收機的觀測信息確定電離層延遲改正,為小范圍的單用戶服務;研究如何實時分離gps觀測中的儀器偏差與電離層延遲;研究如何建立較大區的電離層格網,進而初步設想利用中國地殼運動觀測網路深入研究我國領的電離層的電子濃度變化規律;研究單用戶在不利條件下,如何更好地利用電離層延遲改正信息;研究利用gps監測隨機電離層擾動的基本理論和框架方案;研究如何綜合顧及電離層的周日、季節和年變化,進一步提高利用gps擬電離層延遲的能力;研究如何實現星載單gps低軌衛星的精密測軌中的電離層延遲改正要求。
  14. Furthermore, the isoline maps of mean wind pressure coefficients and rms wind pressure coefficients of the structure under various wind directions are plotted. in the matter of theoretical analysis, modeling with finite element method, using the local mean wind pressure coefficients and time history of fluctuating pressures determined in wind tunnel, the wind - induced dynamic responses for long - span grid roof structures are calculated in frequency domain and time domain separately

    在理論分析方面,建立合理的有限元,利用剛性風洞試驗獲得的各種不同情況下屋面各節點的平均風壓系數和脈動風壓時程,在內和時內進行了大跨網架屋蓋結構的風振響應分析。
  15. This thesis mainly discusses the techniques of channel estimation in frequency domain, which utilizes the optimized leading sequence. an enhanced method for searching optimized leading sequences is introduced based on existing documents. this method can decrease the errors and make the searching and caculating easier

    本論文主要討論用最佳前導序列在中進行通道估計的問題,在前人的基礎上提出一種改進的搜索最佳前導序列的方法,可使得估計誤差減小且便於搜索計算,擬驗證了演算法的有效性。
  16. The system firstly learns the domain training samples by using thesaurus to process word - separation and word - frequency statistics. according to word - frequency distribution, it chooses the feature collection and their weights to formulate feature vector and generate domain model and user model

    系統首先對領訓練樣本進行學習,利用領詞典對訓練文本進行詞條切分和詞統計,並根據詞分佈,提取代表採集目標的特徵項集和相應的權重,生成特徵矢量,形成初始領和用戶
  17. Based on the aerodynamics, control, structural dynamics model of smart rotor in frequency domain deduced and the determination for the number of neurons in hidden layer, the neuro - emulator using multiple independent miso neural networks with its deduced matrix expression for the smart rotor is set up. the rate of training is improved by introducing the orthogonal selection applying for smart rotor to the selection of training cases in neural modeling

    試驗結果驗證了該方法的可行性,在建立了帶有主動控制后緣附翼的智能旋翼系統氣動-控制-結構動力學數學的基礎上,提出了適用於智能旋翼建的多神經網路並聯式的頻域模型,並推導出其矩陣表達式,探討了隱含層神經元數的確定方法。
  18. In order to understand the lamp ' s negative incremental impedance of characteristics and analyze the stability of ballast / lamp system clearly, the low - frequency ballast system stability with closed loop are analyzed based on the hid lamp frequency - domain model in chapter ii

    為了更好地理解燈的負阻特性並分析電子鎮流器系統的穩定性問題,論文第二章著重從燈的頻域模型出發分析了閉環控制下的低方波電子鎮流器系統的穩定性問題。
  19. As to the polyreference implemention of the least - squares complex frequency - domain estimator in mathematical separation technique of modes, this thesis builds a right matrix - fraction description model to estimate the system poles. then frequency point stabilization diagram is set up and analyzed to automatically determine natural frequencies, modal damping ratios and modal participation factors. finally mode shapes are identified based on the least squares theory

    對于態數學分離技術的多參考點最小二乘復識別技術,先建立右矩陣分式,識別出系統極點,再通過建立和分析率點穩態圖,能自動的確定出結構的固有率、態阻尼比和態參與因子,最後根據最小二乘原理識別出態振向量。
  20. Simulation and analyses on the model are done. the paper gives detailed analyses of the motor ' s exciting current by the experiment of the voltage regulation system for the first time. the methods of improving automatic voltage regulator are presented based on the analyses of results

    然後設計了發電調壓器的硬體電路,建立了調壓系統的頻域模型並進行了擬分析,對發電系統作了較為全面的實驗,首次詳細分析了勵磁電流的變化規律,分析了實驗結果,提出了調壓器的改進。
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