系統噪聲系數 的英文怎麼說

中文拼音 [xìtǒngzàoshēngxìshǔ]
系統噪聲系數 英文
system noise figure
  • 系 : 系動詞（打結; 扣） tie; fasten; do up; button up
  • 統 : Ⅰ名詞1 （事物間連續的關系） interconnected system 2 （衣服等的筒狀部分） any tube shaped part of ...
  • 噪 : 動詞1. （蟲或鳥叫） chirp 2. （大聲叫嚷） make noise; make an uproar; clamour
  • 數 : 數副詞（屢次） frequently; repeatedly
  • 系統 : 1. （按一定關系組成的同類事物） system 2. （有條理的;有系統的） systematic
  • 系數 : [數學] coefficient; ratio; modulus; quotient; factor
  1. There are over 80 sets test apparatus in tech - innovation centre, including : anechoic chamber, vibration tester, vibration measurement analysis, impact instrument, constant temperature and humidity facilities. salt spary test case, circle insulation withstand voltage tester, insulation resistance tester, withstand voltage tester, electric lead tester, electrical leakage tester, earth resistance tester, chassis dynamometer, chassis dynamometer control system, high stability dc resistance tester, electrical capacity tester, temperature rise test system

    中心擁有各類分析測試儀器和試驗裝置80餘臺套，包括：消音室振動臺噪聲振動測試分析系統沖擊儀恆溫恆濕實驗儀鹽霧試驗箱匝間耐壓分析儀絕緣電阻分析儀對地耐壓分析儀泄露電流測試儀對地電阻測試儀測功機測功機控制系統高精度直流電阻測試儀電參數測試儀帶電溫升測試儀復合式三坐標測量儀萬分投影儀及電功測試分析系統等。
  2. The main research advances can be summarized as follows : ( 1 ) study the signal processing ' s performances and methods of homing torpedo system comprehensively, in order to setting up a corresponding mathematical models ; ( 2 ) analyze the ocean channel ' s effects on the work of homing system, then found some models such as target echo signal, noise ( including background noise, target radiating noise, etc ), ocean reverberation. according to them, simulate the array signal ; ( 3 ) the system structure, every function blocks composing are studied and founded thoroughly. then, discuss methods of signal processing in time domain and airspace domain ; ( 4 ) program the simulation software of torpedo ' s homing system according to the simulation models and flow charts, which connected with torpedo ' s control part

    本文所作的主要工作及研究成果主要有以下幾個方面： （ 1 ）對自導工作過程中的信號與信息處理的基本理論與方法進行了較為全面的研究，為建立一個較為完備的自導模擬系統提供了理論基礎； （ 2 ）討論了自導系統工作過程中海洋通道對目標回波信號與目標輻射噪聲信號等的影響，建立回波信號的數學模型、環境場中的噪聲信號模型（包括海洋環境噪聲、目標輻射噪聲與魚雷背景噪聲等）與海洋混響模型，模擬產生了聲自導系統基陣接收到的回波信號與噪聲信號； （ 3 ）深入研究並建立了自導模擬系統的總體框架，給出各個具體功能模塊組成，討論了聲自導系統對信號的時域與空域處理，並結合模擬程序中陣列信號處理模塊，給出固定多通道波束形成的模擬實現過程； （ 4 ）根據系統的模擬模型與已建立的模擬流程圖編制了通用魚雷模擬器自導系統模擬軟體，通過網路與控制系統相連，組成完整的魚雷模擬器。
  3. In the recent years, with the development of such technologies as computer and digital signal processing, transaural technology based on system of kemar grows ; it has a broad future on the domain of electro acoustics, indoor - acoustics, yawp - acoustics, psychoacoustics, computer multimedia and manual virtual environment, which has expanded the scope of the system of kemar

    但近年來，由於計算機技術，數字信號處理技術等方面的發展，在假頭型立體聲系統的基礎上，發展了聽覺傳輸技術。它在電聲、室內聲、噪聲、心理聲學、計算機多媒體和人工虛擬環境等許多方面有廣泛的應用前景，其內容已超過了假頭型立體聲這樣一種特殊的聲傳輸和重發系統的范疇。
  4. 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。
  5. Based on the theories described above, calculation formula of general dimension of least square measure and multi - fractal fault diagnosis and analysis system have been established with borland c + + builder 5. 0, and checked by pure sinusoidal and cosine signal and sinusoidal signal with noise, and verified by the examples

    基於上述原理，建立了最小二乘法的廣義維數計算公式，用borlandc + + builder5 . 0編制了以廣義維數計算分析為基礎的多重分形故障診斷系統，並對標準的正弦信號、餘弦信號及帶有噪聲的正弦信號進行了驗證。
  6. In chapter 6 a digital interception system is designed and its operating principle is introduced. plenty of experimental results are provided here. in chapter 7 a mathematic model of electron beams in crt of computer vdu is given and entropy preservation performance of tempest transceiving system is discussed, a soft - tempest measure is suggested accordingly

    其中第六章設計了數字偵收系統，介紹了其工作原理，並提供了豐富的實驗結果；第七章給出了計算機陰極射線管顯示器電子束的數學模型，據此討論了tempest通信系統的保熵性，接著分析了數字偵收系統的抗噪聲性能。
  7. It has been shown that : the little indentation which represents the quantum noise of the system appears in the evolution curves ; the quantum noise which is caused by virtual photon field gradually becomes weak when w increases, the quantum noise increases when n increases ; the virtual photon process make the antibunching effect strengthen, make the squeezing degree deepen obviously, and lead to the additional vibration of entropy, the oscillation extent of the additional vibration of entropy increases when n increases and decreases when co or g increase. besides, the quantum dynamics of two coupling atoms interacting with a single mode ligh t field in a kerr medium is studied in this paper ; the influences of the kerr effect on the mean photon number, the degree of second order coherence of field, the evolution of the field entropy and the squeezing effect are also discussed

    ）的增大，量子噪聲分別減小和增大；虛光子過程使光場的反聚束效應增強，使光場的壓縮程度明顯加深，並引起了附加的「熵振蕩」 ，這種附加「熵振蕩」的幅度將隨著光場初始平均光子數（ ? ）的增加而增大，隨著光場頻率和原子間耦合系數g的增大而減小。本文還研究了充滿kerr介質腔中「耦合雙原子-單模光場」相互作用系統的量子動力學性質，研究了克爾效應對場的平均光子數、二階相干度、場熵演化特性及光場壓縮效應的影響。
  8. A minitype wireless noise measure system is designed to act as an automonitor, which has been proved to be a practical device

    試驗結果表明，該系統可以有效獲得飛機的噪聲數據，測試結果與模擬結果比較吻合。
  9. The circuit is used in high resolution resistance measuring. the coupled chaotic circuit array composed of this circuit is researched by computer simulation and circuit experiment. results show that, it is feasible to improve the stability of orders of chaotic systems and reduce noise in measuring by coupling

    最後，對以這種單電源驅動的混沌電路為基本單元所構成的耦合混沌陣列在提高系統輸出的穩定性和抑制噪聲作用方面，進行了計算機模擬研究和實際的電路實驗研究，結果顯示通過耦合的方式，可以將信號檢測的精度提高近一個數量級。
  10. According to the theoretical parameters and analysis of clustering identification of noises, and based on the theory of spread frequency communication and bpsk, the remote reading meter system through medium - voltage power line is realized

    根據理論參數及噪聲分類識別分析，以直接序列擴頻通信為理論基礎，採用bpsk調制解調，設計了基於中壓電力線的遠程抄表系統。
  11. In this paper, after introduction of the code division multiple access ( cdma ) and orthogonal multicarrier ( mc ) technique, the system model of mc - cdma is analyzed and the bit error rate ( ber ) performance in downlink and uplink channel is shown in awgn channel by computer simulation

    本文在碼分多址技術和正交多載波技術原理基礎上，分析了高斯白噪聲通道中多載波碼分多址（ mc - cdma ）系統的數學模型，並且使用不同的擴展碼對下行通道和上行通道誤碼率性能分別作了計算機模擬分析。
  12. Measurement points include : over floor corresponding to the center of bogie truck, air return port, air feeding port, over coupler and draft gear, head acoustics measurement and analysis system is used in signal capture and data process

    採用headacoustics測量分析系統進行了噪聲測量，並利用該軟體對採集到的數據進行回放，截取有效數據進行數據處理，處理的結果，以圖表的形式輸出。
  13. Then the thesis further analyses some core techniques including the system of database, data warehouse and data mining and so on, and presents the frame of function of bank crm. the thesis puts its emphasis on the research on the data preprocessing of data warehouse, data copying, data cleansing, data integration and quality verifying included. finally the thesis discusses the key technology of data warehouse in bank crm - the cleansing of data of customers, and presents some methods of cleansing aiming at noisy values, missing values, conflicting values and duplicated values

    本文在充分分析銀行crm的需求的基礎上，提出了基於數據倉庫的銀行crm系統的體系結構，並進一步分析了該體系結構中客戶數據庫系統、數據倉庫、數據挖掘等核心技術組件的內涵，給出了銀行crm系統的功能構架；重點研究了銀行業務系統多年積累的客戶數據向數據倉庫遷移的預處理方法和過程，其過程包括數據復制、數據清洗轉換、數據集成、質量檢驗和數據裝載；最後討論了銀行crm系統應用數據倉庫的關鍵技術：客戶數據清洗，給出了針對噪聲數據、空缺數據、不一致數據和重復數據的清洗方法。
  14. This ku - band three channel receiver consists of spst modules, lna modules and image rejection mixer modules. these modules were designed and tested separately, then were assembled to the whole receiver. all the circuits were designed with small - sized devices so as to reduce the total size of the receiver. and the noise figure was considerably reduced because of the image rejection mixer

    另外，由於採用了鏡像抑制混頻器，從而使整機噪聲系數大為降低。在設計方法上，本文採用了先進的微波電路設計軟體ansoftserenade對所有的電路和系統進行設計、優化和模擬，大大的縮短設計周期，提高設計效率。
  15. The white gaussian noise was successfully separated from noise signal in low - field pulse nmr system and its parameters were estimated by using this method

    採用該方法從實際低場脈沖核磁共振系統噪聲信號中分離出高斯白噪聲並對其進行了參數估計。
  16. Using kalman model and gaussian random phase - screen fft, we simulated the distribution of illumination beam through long distance atmosphere and its frequency character. also other facts in simulation were analysised, such as reflection of niaterial under natural lighting, point spread function of optic system and electronic noise

    文中用kalman譜模型和菲涅爾衍射的fft技術實現了照明光大氣傳輸的數值模擬，分析了照明光分佈規律，並提出了材料反射特性、光學系統、採集系統和圖像噪聲的模擬方法。
  17. Compared with classical recursive extended least squares, their accuracy obviously is improved. applying these new algorithms to the parameter estimation problem for systems with measurement noises, some new approaches and algorithms of parameter estimation for system with measurement noises, are presented, for example, two - stage rels - gevers - wouters algorithm and three - stage rls - pi - gevers - wouters algorithm, which solve the biased parameter estimation problem by classical least squares method

    並將這些演算法推廣到帶觀測噪聲系統參數估計的問題，給出了帶觀測噪聲系統參數估計的一些新方法和新演算法，其中包括兩段rels - gevers - wouters演算法和三段rls - pi - gevers - wouters演算法，解決了用普通最小二乘法估計帶觀測噪聲系統未知參數的有偏問題。
  18. The main contents of this dissertation are as follows : 1. in this dissertation, the development and status quo of signal estimation for smn is recalled. moreover, data fusion technology for multi - sensor systems and estimation theory of 2 - d systems are introduced simply

    本文主要工作如下：第一，本文回顧了帶乘性噪聲系統的最優估計理論的發展和現狀，並簡單介紹了多傳感器數據融合技術及二維系統理論。
  19. The methods of data association and tracking beginning and ending to single and multiple targets tracking in the multi - echo environment is listed. at the end of the thesis, a method is introduced, which is that based on the most closed principle, without the chosen echo, the current forecasting values added yawp based upon the former state values is considered as the target state estimated value. the value is an input of observation equation, the output of the observation equation is considered a chosen echo. and the method is validated in the simulation results

    針對多目標跟蹤問題，首先對多目標跟蹤的原理和跟蹤門的形成方法進行了概述，並對多回波環境下單目標跟蹤和多目標跟蹤的常用的數據關聯方法和跟蹤起始、跟蹤終結方法進行了介紹，在本文的後半部分，對多目標的運動狀態進行了模擬研究，提出了一種目標狀態估計方法，該種方法的思想是當前時刻如果目標跟蹤門內沒有所期望的候選回波，首先計算出目標在前一時刻的運動狀態下對當前時刻的預測值，並將該值疊加上系統噪聲作為量測方程輸入值，然後將觀測值作為候選回波對目標進行狀態估計。
  20. ( 2 ) the sensitivity technologies are analyzed, and the methods of improving the receiver noise figure are studied

    （ 2 ）分析了靈敏度接收技術相關參數，研究了優化接收機系統噪聲系數的方法。
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