background signal 中文意思是什麼

background signal 解釋
背景信號
  • background : n 1 後景，背景；基本情況；（紡織品等的）底子；出身；經歷。2 隱蔽的[不引人注目的]地位；幕後。3 襯...
  • signal : n 1 信號，暗號；信號器。2 動機，導火線 （for）。3 預兆，徵象。adj 1 暗號的，作信號用的。2 顯著的...
  1. Initial growths of disturbances are measured by means of hot - wire anemometry. due to the detected signals with low signal to noise ratio, the coherence function is used to eliminate background noise during data reduction

    在擾動增長的初始階段，信號的信噪比非常地低，根據相關譜分析方法，應用相干函數，將擾動信號有效地提取出來，測量了初始擾動的增長。
  2. The dissertation tries to combine signal processing and information fusion with the application background of under - water recognition so as to improve the reliability and accuracy of eradiate noise recognition system

    本文試圖把現代信號處理技術與信息融合技術相結合，應用到具體的水下目標識別領域，以提高水下目標被動識別系統的準確性和可靠性。
  3. The tv goniometer is the ground control equipment of a model of anti - tank missile. it uses two ccd cameras and the signal extraction method of background counteract, which can make the guiding process of anti - tank missile wo n ' t interfered by sunlight, firelight of battle field, light, flame tracer etc. it can greatly improve the anti - interfering ability of the anti - tank missile system

    該電視測角儀是某型反坦克導彈武器系統的地面控制設備，它採用兩個ccd攝像機和背景抵消的信號提取方法，可使反坦克導彈的制導過程不受太陽的反光、戰場的火光、燈光、曳光彈等干擾。
  4. The concept of irradiance signal - to - noise ratio ( snr ) on the target plane and the minimum of the irradiance that can be detected by the detector was taken as the beginning, combined with a thorough analysis of the spectrum radiating feature of the target and the sky background, the atmosphere conditions, spectral filtering and the influence that the various components in the system have on the target irradiance on the detector ' s target plane and the background irradiance snr, the equation of the flying bomb ' s effect range affected by the point of burst measuring system is made, and all related factors that have an impact on the effect range are analyzed as well

    從探測器靶面上輻照度信噪比的概念、探測器的可探測輻照度最小值出發，在詳細分析目標、天空背景的光譜輻射特性、大氣條件、光譜濾波技術以及系統各環節對探測器靶面上目標與背景輻照度信噪比的影響的基礎上，推導了炸點測量系統對爆炸的飛行彈體的作用距離方程，分析了影響作用距離的諸因素。
  5. 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。
  6. The ir image of the target, background and the ir flares is called ir signal for the ir seeker

    包含目標、背景和干擾的紅外熱圖像稱為導引頭紅外信號源。
  7. In present study, we obtained large numbers of phasic discharge pattern neurons, which play important role in analysis and perception of sound signal from environment with background noise

    實驗中所記錄到的大量phasic神經元在分析背景噪聲中的聲信號，以及聲信號的識別方面可能扮演重要角色，因為聽覺認知的最初階段就是信號識別。
  8. Annex b introduce a voice activity decision ( vad ) algorithm which class speech signal as voice signal and background noise signal

    Annexb提出了一種靜音壓縮演算法（ vad ） ，它將語音信號分為話音信號和背景噪聲信號。
  9. The nonlinear filtering for nbi estimate - subtract assumes that the prediction error is dominated by spread spectrum signal and the background noise power is far below spread spectrum chip power, this assumption promises the low error ratio of chip decision but may not be attainable to digitalized dsss receiver in military communication environment, and does not coincide with the principle of dsss communication that decreases bit error ratio ( ber ) depending on spread spectrum gain, not on chip power

    在干擾估計抵消濾波中，以往的非線性濾波要求干擾抵消濾波后擴頻信號功率遠大於殘余噪聲功率，進而假設碼片判決的誤碼片率基本為零，這一要求對軍用擴頻通信是不利的，而且也不符合擴頻通信利用擴頻增益降低誤碼率的原則。
  10. This paper introduces common background knowledge of intersection, mainly describes traffic control design principle, such as signal timing and lane channelization. it also summarizes the same point between signal timing and lane channelization in nature and illustrates that it is optimal cycle length and signal phase that is the critical part of signal timing

    =本文介紹了交叉口的一般背景知識，重點闡述了平面信號交叉口的交通控制的設置原理，包括信號配時原理和路口渠化原理，概括了信號配時和路口渠化原理的本質相同點。
  11. But, the eeg signal that we can acquired is very weak and is badly contaminated by strong background noise, such as electrooculogram ( eog ), electrocardiogram ( ecg ), and line noise ( 50hz or 60 hz power frequency interference ), etc. eeg is a typical non - stationary random signal with a certain extent of non - gaussian and non - linear character

    但是我們能夠獲得的腦電信號一般非常微弱、並伴有很強的背景噪聲，是一類典型的非平穩的隨機信號，且存在一定的非高斯性和非線性。傳統的分析處理方法一般將腦電信號近似認為是線性的準平穩的高斯分佈隨機信號，這使得分析結果往往不能令人滿意、實用性差。
  12. Then we introduce the character of the atmosphere channel, which we emphasized on the atmosphere scatter, absorption and scintillation ' s effect on the laser beam. in chapter, we explain why we used cassegrain telescope to collect the optical signal at first, then the lightsource, detector, front amplifier used in optical communication has been compared to that of fiber communication, the noise including shot noise, thermal noise and background light noise has been explained here for analysis the snr and ber in the next section

    在第三章介紹無線光接入系統的光收發單元，採用多孔徑卡塞格倫式的收發天線對消除減小大氣湍流影響有較大作用，針對大氣通道的特點無線光系統收發單元在光源、光探測器、前置放大電路上存在許多有別于光纖通信的技術，同時還闡述了光接收機包括背景噪聲的噪聲機制和接收靈敏度、誤碼率等指標，最後給出了一個整個傳送鏈路的功率預算。
  13. Eeg is faint in a background of strong interference, so most hospitals adopt special shielding room to detect eeg signal so that patients can ’ t be inspected in time

    由於腦電信號的微弱性以及它的強干擾背景，目前大多數醫院仍然採用專用腦電屏蔽室進行檢測，這使得對病人的監護缺乏實時性，不能隨時監測病人的病情。
  14. Take integrity of object information into condition, a two - dimension signal processing method which can make a measurement of the target ’ s speed as well as the range is brought forward at the basis of waveform parameter design. and simulation in the background of hf multi - object with noise is taken. a comparison of signal properties, processing and antinoise detection performance is taken between mcpc and another two high range resolution radar signals : single carrier pulse coded signal and step frequency pulse coded signal

    考慮到目標信息提取的相對完整性，以高頻雷達為背景，在對多載波相位編碼脈沖串信號參數設計的基礎上，推導了三種多載頻相位編碼脈沖串信號的距離速度二維處理過程並相應的對多目標噪聲環境進行了模擬;將多載波相位編碼信號與另外兩種距離高分辨信號:單載頻相位編碼信號和相位編碼階梯跳頻信號，在信號特性、處理過程和抗噪聲特性方面進行了對比;本文從理論上為多載波相位編碼信號的波形設計和分析、信號的處理打下基礎。
  15. It introduces the method of modulated light subtracting infrared radiation of atmosphere and background as well as the method of phase - lock - loop detecting feebleness signal

    採用光路差分調制的方法實時扣除背景紅外輻射，並採用鎖定放大器進行微弱信號的檢測。
  16. In key effects, the key cut signal is used to specify where to cut a hole in the background that will be filled with the key fill video

    在鍵效果中，鍵切割信號被用來指定將背景圖像中哪裡摳出一個空洞並被鍵填充信號填充。
  17. Eventually, the filtering program which can successfully take the useful fault signal out from the background with strong noise is designed

    對圖象數據的處理採用turboc + + 3 . 0作為編程工具，成功地設計了在強噪聲背景下將微弱的有用信號提取出來的濾波程序。
  18. The research on the background signal simulator is based on the idea of the soft wireless

    背景信號模擬器的研究參考了軟體無線電的思想。
  19. This paper introduces some practicable ways to realize the design of background signal simulator console software, database exploitation and the data processing for the gps receiver ( gn - 79 ). to meet the needs of these superiorities such as simple maneuverability, modularization and high secrete security, we considerably think of those requirements in the aspects of the signal - producing, hardware - setting, timing and orientation, user setting and so on, during the period when we design the software, make the database accessing down to the bottom layer, and obligate full space for its improvements of software modification and function expansion

    由於工程的操控部分即軟體實現部分需要體現簡便、易控、模塊化以及保密性好等優勢，因此，在設計實現操控界面的同時，充分考慮了信號產生、硬體設置、定時定位以及用戶設置等各方面的要求，實現了數據庫訪問技術到底層的管理，為將來的軟體修改、功能擴容留下了充分的空間。
  20. His idea is based on the fact that the pivot of the soft wireless structure is to put the broad band a / d and d / a conversion near to antenna by all means, and to define the functions of the transmitter - receiver as many as possible in the forms of software ( namely realized by software ). the technology of background signal simulator puts the focus on the methods used to realize the software, namely to exploit the functions of the hardware ( for example, dsp fpga or asic ) through the idea of software design, and to produce ( realize ) wireless signals by high speed lsi and software programming

    1992年5月的全美電信系統年會上， mitre公司的資深科學家joemitola首次給出了軟體無線電的定義，他認為：軟體無線電的組成架構的中心點是將寬帶模?數（ a d ）和數?模（ d a ）轉換器盡可能地靠近天線，將盡可能多的電臺功能以軟體的形式定義（即用軟體來實現） 。背景信號模擬器所採用的技術集中體現在軟體無線電技術，即用軟體化設計去開發硬體（如dsp 、 fpga 、 asic ）功能，採用高速大規模數字集成電路、軟體編程的方法產生（實現）各種無線電信號。
分享友人
分享到 Line

分享到臉書