噪聲因數特性 的英文怎麼說

中文拼音 [zàoshēngyīnshǔtèxìng]
噪聲因數特性 英文
noise figure characteristics
  • 噪 : 動詞1. （蟲或鳥叫） chirp 2. （大聲叫嚷） make noise; make an uproar; clamour
  • 因 : Ⅰ動詞[書面語] （沿襲） follow; carry on Ⅱ介詞1 [書面語] （憑借; 根據） on the basis of; in accord...
  • 數 : 數副詞（屢次） frequently; repeatedly
  • 特 : Ⅰ形容詞（特殊; 超出一般） particular; special; exceptional; unusual Ⅱ副詞1 （特別） especially; v...
  • 性 : Ⅰ名詞1 （性格） nature; character; disposition 2 （性能; 性質） property; quality 3 （性別） sex ...
  • 特性 : characteristic（s）; character; performance; features; properties; behaviour; response; character...
  1. 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，提出站模型，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，利用此模型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，對激光器進行了頻域分析，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。
  2. Thereafter, the applications of go sequences in single - cell s - cdma systems are discussed in this thesis. in additive white gaussion noise ( awgn ) channel, interference components in s - cdma systems accommodating more users than the spreading factor is analyzed based on the theoretical bound of the periodic correlation mean square property. then two interference - suppressed s - cdma system models of augmented capacity are proposed, along with the analysis and simulation results

    在加性白高斯噪聲（ awgn ）通道條件下，以序列集周期相關均方特性理論界為基礎，對序列個數大於系統擴頻因子的s - cdma系統干擾組成進行了分析，並基於截短wh序列提出了兩種高容量低干擾s - cdma系統模型，給出了分析和模擬結果。
  3. The basic characteristics of the current data network are point - to - point, connectless, doing one ' s endeavor, no quality of service, etc. these characteristics do not meet the requirement of real - time services, therefore, the realization of voip need support of the some key technology. these technologies includes : speech sound coding and data compression, real - time transmission and control, mute compression and multicast, acoustic - echo cancellation and comfort noise generator, dynamic monitor and guarantee of quality of network service, as well as, the compatible of different network and different protocol with each other

    但現有的數據網路的基本特性：點對點的、無連接的、盡力而為的、沒有服務質量保證等特性並不適合與實時的業務要求，因此voip的實現需要一些關鍵技術的支持，這些技術包括：語音編碼和壓縮技術、實時傳輸和控制技術、組播技術、靜音壓縮和舒適噪聲生成技術、回聲消除技術、網路服務質量的動態監測和保證技術、以及不同的網路、不同的協議之間的互連互通等等。
  4. So, both 1 / f noise power spectrum measurement and similarity coefficient extracted from its time series can offer economical, effective and indestructible tool to detect the latent damage induced by esd and hci for mosfets

    因此，無論是1 / f噪聲功率譜的測試還是由其時間序列提取得到的相似系數均可以作為經濟、有效、完全非破壞性的工具，替代傳統的電特性用於檢測靜電引起的mos器件潛在損傷以及熱載流子注入損傷。
  5. The statistic of wavelet transform coefficient algorithm can solve the periodic noise, high - energy noise and some non - gauss noise simply and effectively ; bi - spectrum can acquire more information from the original signal than power - spectrum, detect more information except from range and restrain the gauss noise. short - time speech signal can be considered as stationary and with periodic non - gauss signal, so we can make use of bi - spectrum to obtain the speech character and separate the speech and noise and detect morse telegraph signal ; complex number spectrum variance algorithm is put forward based on the deeply observing speech data, it is a new algorithm, experiment show that it is simple, effective

    統計演算法在解決周期信號、高能噪聲和高斯信號方面有獨特之處，能簡單有效提取以上噪聲的特徵;雙譜能夠提供比功率譜更多的有用信息，有效地檢測信號幅度之外的其它信息，並能有效抑制高斯噪聲，短時語音信號一般認為是平穩且有一定的周期性的非高斯信號，因而可以利用雙譜來提取語音信號特性並實現信噪分離;復數譜方差演算法是在對語音信號進行深入觀察和分析的基礎上而提出來的一種全新的語音特徵提取方法，此方法簡單而有效的提取了語音、噪聲的特徵以及檢測莫爾斯信號，基於實驗表明，該演算法取得了很好的效果。
  6. Transmition velocity relys on the style of encode and modulation essentially during modern data transmition for the quality of using line bandwidth and the immunity of code ties on them tightly. but it is important that the velocity of data transmition reaches its limitation in fact for the interface of environment and cross - talk. so for the improvement of transmition velocity, we must analyze the characteristics of noise signal and the model of line deeply and then take some useful measures to better the immunity of modulation wave

    在現代通信的數據傳輸過程中，傳輸速率本質上是由傳輸的編碼方式和調制方式決定的，因為編碼方式和調制方式直接決定了線路頻帶利用率和碼元抗干擾能力的好壞，因而直接決定了傳輸速率；但是在實際應用過程中，數據傳輸速率是不可能達到理想狀況的，因為環境干擾、串音干擾等因素的存在使得線路的頻帶不可能被完全利用起來；因此，必須認真分析線路的噪聲信號的特性以及噪聲線路的模型，以便在編碼方式和調制方式中針對性的做一些改進措施以改善調制波形的抗干擾能力，使得傳輸速率能夠進一步提高。
  7. In mobile communication and high - speed wireless digital communication, multi - path, the finity of channel bandwidth and faultiness of the channel, lead to the bringing of intersymbol interference ( isi ) when data transfer. this is an important factor that degrades the performance of communication. however channel equalization technique can eliminate the isi and noise, it can also reduces the bit error ratio

    在移動通信及高速無線數據通信中，多徑效應和通道帶寬的有限性以及通道特性的不完善性導致數據傳輸時不可避免地產生碼間干擾（ isi ） ，成為影響通信質量的重要因素，而通道的均衡技術可以消除碼間干擾和噪聲，並減少誤碼率。
  8. It can be concluded after analysis that the speech distortion and the residual noise can be approximately regarded as multiplicative noise and additive noise, respectively. thus, we use a parallel model combination ( pmc ) algorithm, which is deployed in model space, to adapt the parameters of speech models to compensate the residual noise, or we use a cepstral mean normalization ( cmn ) algorithm in feature space to compensate both the speech distortion and the residual noise

    分析表明，語音失真和剩餘噪聲可近似看作乘性噪聲和加性噪聲，因此可在模型空間利用并行模型合併（ pmc ）演算法通過調整模型參數對剩餘噪聲進行補償，或者在特徵空間利用倒譜均值歸一化（ cmn ）演算法對語音失真和剩餘噪聲同時進行補償。
  9. By studying the discrete fourier transform properties of the band - limited digital signal, the authors introduce alternating projection neural networks into the paper, expand apnn ' s application scope from real field to complex field, and present several important conclusions on apnn. analyzing and discussing network ' s tolerance to noise, convergence rate and the spectral leakage problem of the truncated signal expected to be extrapolated by using these conclusions, the paper presents an extrapolation algorithm for band - limited signals based on alternating projection neural networks. a lot of simulation experiments show that the algorithm is effective. in addition, the algorithm is also effective to spectrum extrapolation. owing to adopting network structure, the algorithm is prone to parallel computation and vlsi design, and consequently can satisfy real time military processing needs

    本文通過對頻帶受限數字信號的離散傅立葉變換特性的研究，引進了交替投影神經網路，並將其應用范圍從實數域拓廣到復數域，且給出了在復數域仍然成立的若干結論.運用這些結論，在對網路噪聲抑制、網路收斂速度及待外推信號因截斷而造成頻譜嚴重外泄問題的分析與討論的基礎上，提出了一種基於交替投影神經網路的外推演算法.模擬實驗表明該方法是行之有效的.另外，該演算法對頻譜外推同樣適用；由於它採用全互連神經網路結構，易於并行計算和vlsi實現，從而可滿足軍事上實時處理的需要
  10. Control experiments of the inverted pendulum show that, comparing with pid and fuzzy control strategies, this rmbfc strategy possesses simpleness, validity. it not only reduces the number of fuzzy rules, quicken optimizing speed of mea and improve system fastness, but also avoids the disadvantage of general fuzzy controller that input variables are reduced at random from subjective view because disposal of analyzed data is objective. at the same time, yawp caused by strong coupling relation between variables is eliminated due to getting rid of abundant condition attributes, which makes rapid speed and robustness of system improved

    摘要倒立擺系統的控制實驗表明，與pd和模糊控制策略相比， rmbfc控制策略簡單有效，不僅大大減少了模糊規則的數目，加快了mea的參數尋優速度，提高了系統的快速性，而且由於對被分析數據整體的處理是客觀的，避免了常規模糊控制從主觀角度隨意約簡輸入變量的弊病;同時，由於去掉冗餘的條件屬性，消除了因變量之間強禍合關系而產生的噪聲，使系統的控制特性得到了改善，快速性提高，魯棒性增強。
  11. Although adsl comes with new digital processing, coding, modulation and error correction technologies, it is also faced with various challenges out of subscriber lines, such as background noise, impulse noise, insertion loss, cross talk, wire size variations, bridge tap, line joints and line insulation, etc. all those factors tend to produce adverse impacts on the performance of high - speed transmission services. firstly, the insertion loss of copper lines increases in proportion to the length of lines

    雖然adsl採用先進的數字信號處理技術、編碼調制技術和糾錯技術，但是在推廣adsl業務時，用戶線路的許多特性，包括線路上的背景噪聲、脈沖噪聲、線路的插入損耗、線路間的串擾、線徑的變化、線路的橋接抽頭、線路接頭和線路絕緣等因素將影響高速率傳輸業務的性能。
  12. We raised a new model that we disassemble the character into several parts, which could be recognized by computer topologically based on the high - frequency wavelet coefficients vector, disregarding the traditional extraction method that used the statistical or structural feature based on the individual pixel in the 2 - dim plane of character. moreover, the concept of multi - dim cognizing feature model was put forward by encoding the character, according to its " location and run - length information. the information confusion and redundancy could be largely eliminated, as leaded to the improving of the preciseness when recognizing the character

    克服以往結構、統計方法在字元特徵提取中無法剔除噪聲、偏移等冗餘信息的不足，以認知的新思路分析圖像，給出基於小波子圖的筆劃定義，給出一種注重反映字元部分最為重要的筆劃的類型、數量、遊程、位置特徵，改進了基於字元二維圖像的統計與結構特徵提取方法因變形，畸變造成信息混淆和冗餘；給出了提取多屬性字元認知特徵的方法和識別機制，實驗表明，該方法能有效的識別字元； 3
  13. This paper introduces the importance of seawater simulation in virtual reality field. for the reason that the seawater simulating technologies have some disadvantages, and 1f ~ noise is applied and the model is proposed subsequently to simulate seawater motions. the natural motions of seawater in the wind can be simulated on the condition that the wind force, the main factor influencing seawater motions, is controlled properly by changing some certain parameters

    分析了海水模擬在虛擬現實技術中的地位，針對現有海水模擬技術的不足將風噪聲模型應用於虛擬現實海水模擬技術中，提出了1f噪聲的海水運動模型，可以用改變參數的方式來選擇影響海水動態性能的重要因素風強，能表現出海水在風中運動的基本特性。
  14. The system based on pid control theory has characteristics of fast response speed and higher peak overshoot, and it also has a good performance of tracking, but it is lack of ability of disturbance rejection. because smvs control method is insensitive to the variations of the model parameters, nonlinear and exterior noises, the attitude stabilization system designed based on smvs has fast response speed, higher ability of disturbance rejection and has no peak overshoot, namely, the system is robust

    模擬結果表明，基於pid控制規律設計的系統具有響應速度快但超調大的特點，系統的跟蹤性能較好，但抗干擾能力較差；滑模變結構控制方法因為其對模型參數的變化、非線性和外擾噪聲的不敏感性，設計的聲納基陣姿態穩定系統無超調，響應速度快而且抗干擾能力強，具有很好的魯棒性。
  15. ( 3 ) study on the control mechanism of structure noise radiated from rotary machines, we build a common model of rotary machine structure noise analysis relied on the general characters of rotary machines. based on this model, we analyzed various influence factors to structure radiant noise using the union of revolution and numerical calculation method. we found that the joint stiffness between the rotor and the frame is the most sensitive parameter of structure radiant noise by calculating and analyzing

    在旋轉機械結構噪聲控制方面，根據旋轉機械的基本特徵，建立了旋轉機械結構噪聲分析的簡化模型，基於該模型利用解析與數值計算相結合的方法對結構噪聲的各種影響因素進行了分析，通過計算分析發現，轉子與機體的連接剛度是機體結構聲的最敏感參數，同時各參數對結構噪聲的影響具有互補性。
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