跟蹤噪聲 的英文怎麼說
中文拼音 [gēnzōngzàoshēng]
跟蹤噪聲
英文
tracking noise-
Series of guowei dry - method composite machines as new product are explored with our many years ' experience, the requirement of the users. the first metal of this machine is adopted with : photo - ecectricity auto. tracking " correcting deviation equipment, magnetic powder tension control. pneumatic back pressure shifting blade, oven temperature controlled qutomatically, big roll with oil heating, coating composite pneumatic control as well as double frequency governor etc. it will make the machine with fast speed, lower voice, low polluted by air, shout consumptionfor energy, stable working etc. especially suitable for al - foil with smooth surface and no enough firming, glass paper, polyester ect. the composite material with hard strength, fireproof, anti - ventilation, anti - fatty, frozen, dudrable steam etc character. it is widely used in food, pharmacy, as well as daily articles to package
「國偉」 、系列乾式復合機，是我廠根據多年的復合機製造經驗及結合客戶需求，開發的新產品，該機第一基材採用了「光電自動跟蹤」糾偏放卷裝置，磁粉張力控制、氣動背壓移動式刮刀、烘箱溫度分段自動控制、大輥筒導熱油加熱、上膠復合氣動控制及雙變頻調速技術，使該機具有復合速度快、噪聲低、空氣污染小、能耗低、運行平穩等特點，適宜於表面光滑的鋁箔玻璃紙聚酰胺等與聚乙烯、聚丙烯等薄膜的復合，復合薄膜具有強度高、防水、防透氣、防油脂、可冷凍、蒸煮等優點，廣泛應用冷凍食品、乾燥食品、醫藥品及日用品的包裝。The thesis analyzes the transmitting characteristic of the uwa channel, derives the propagation losses, eigenrays and channel impulse responses of uwa channel by use of the kraken normal wave mode and the ray trace algorithm based on velocity - depth curvilinear profile approximation. based on the analysis, a scheme of auto - replying lduwarc system by means of spread spectrum technique has been designed
論文首先分析了遠程聲遙控通道傳輸特性，分別利用kraken簡正波和射線跟蹤模型對深海和淺海水聲通道的傳輸特性進行分析，對通道的多徑結構、衰落和環境噪聲進行了計算，並在此基礎上設計了基於擴頻技術的自主應答式遠程聲遙控系統方案。Emulation and modeling based on measurement errors of white noises by tracking radars
基於白噪聲的跟蹤雷達量測誤差建模與模擬With the research development in antenna area, smart antenna, which could dynamically adjust antenna pattern in order to trace useful signals and suppress interference and noise, comes into researchers ’ sight
隨著天線領域研究的進展，一種可以動態調整天線方向圖，有效跟蹤有用信號，抑制干擾和噪聲的天線系統? ?智能天線系統，進入了研究者的視野。Present a modified particle filter ( pf ) algorithm based on the los / nlos binary state information of propagation environment using the numerical method of the probability density function ( pdf ) about the hybrid noise. the key idea is using numerical method to calculate the hybrid noise pdf, and integrating binary environment information to get filtering result
2 .給出了應用粒子濾波器改進直達波與非直達波混合環境中移動終端跟蹤性能的新演算法，特色是利用數值方法計算混合噪聲密度函數，結合二元環境信息完成濾波估計。Backed up by the soplat theory based on particle kinematics, the second chapter of this paper presents with analysis and simulation of several single observer passive measurement models, which uses such relative movement parameters as bearings changing rates and centrifugal acceleration information on the basis of bearings measurements. in the third chapter, the observability of location respectively using bearings and its changing rates information and centrifugal acceleration information is analyzed, and its observable condition is got. the fourth chapter puts forward the modified covariance extended kalman filtering ( mvekf ) against the defect of traditional extended kalman filtering ( ekf ), whose performance is simultaneously compared in the chapter with the performance of ususal tracking algorithm such as ekf, mgekf, iekf by computer simulation
在近年來提出的基於質點運動學原理的單站無源定位理論基礎上，本文第二章提出了幾種在角度測量的基礎上增加角度變化率及相對運動的離心加速度等運動學參數的單站無源測量模型，並對它們進行了分析和模擬；第三章分別對利用角度及其變化率信息定位和利用離心加速度信息定位的可觀測性進行分析並得到了相應的可觀測條件；第四章針對傳統擴展卡爾曼（ ekf ）方法的缺點，提出了一種修正協方差的擴展卡爾曼濾波（ mvefk ）方法，並將其和ekf 、 mgekf 、 iekf等常用的單站無源定位濾波方法進行了性能模擬比較；第五章通過引入雷達機動目標跟蹤方法和模型，提出了利用角度及其變化率對機動輻射源跟蹤的多級噪聲自適應方法和imm方法；第六章主要對角度變化率和離心加速度參數的獲取技術進行了研究，提出了幾種高精度測量脈沖序列多普勒頻率變化率的方法。The signal format of gps is analyzed, the principle models and mathematical models are established, the ber performance is analyzed in a channel interfered with wide - bandwidth awgn, narrow - bandwidth awgn, transmitted signal, single - tone signal respectively. based on the results above interference methods are discussed and simulated. then the performance of code acquisition and code trace of a digital gps receiver are discussed. the modem of linkl 1 and link4a are modeled and their ber performances are analyzed and simulated in channel s interfered with awgn, single - tone signal and multi - tone signal respectively
建立了jtids的收發終端的數學模型，分析它在噪聲干擾、相關干擾、互相關干擾下的誤碼性能，提出較佳的干擾方法和干擾碼型，並進行模擬模擬；分析了gps的信號格式，建立了gps的原理框圖模型、信號數學模型，並對其在寬帶噪聲干擾、窄帶噪聲干擾、轉發干擾、單頻干擾等情形下的誤碼性能進行了分析比較，提出相對較佳的干擾方法，並做了計算機模擬，針對一數字式gps接收機中擴頻碼捕獲與跟蹤環的特性進行分析；建立了link11和link4a數據鏈調制解調數學模型，對它們在噪聲干擾、單音干擾、多音干擾等下的誤碼性能進行分析，最後對干擾情況進行了模擬模擬。When the targets maneuver slightly, we can get good result using extended kalman filter ( ekf )
當目標做輕微機動時，將機動加速度看作噪聲採用擴展卡爾曼濾波（ ekf ）可以得到很好的跟蹤效果。This paper has launched exhaustive analysis and study to every module of pll and its key part ( vco ) is also improved. the history of phase - locked technology and the actuality of research on it are introduced. and then beginning with the fundamental principles of a phase - locked system, we build the mathematical model based on the architecture of the traditional analog pll, and afterwards investigate some of its characters such as tracking, acquisition, noising, and stability
本文在對鎖相技術的發展歷史和研究現狀調查研究的基礎上，從鎖相系統的工作原理入手，分析了鎖相環的數學模型，並以此為出發點對其跟蹤性能、捕獲性能、穩定性及噪聲性能等性能進行了較為深入的研究，對環路的各項參數指標進行了詳細的推導，得出了鎖相環數理分析的普遍結論。A tv target tracing system has following features : real - time, image indistinctness on the ground of dynamic tracing and external environmental distortion, high noise background intensity and so on
電視目標跟蹤系統實時性強，由於是動態跟蹤和外界環境干擾，所以導致圖像不清晰、背景噪聲較強。The paper includes four sections followed here : the first section studies the modeling of signals of pulse doppler radar seeker, and establishes a radar signal simulation model, including radar emitting signal model, receiving signal model, receiving echo signal model, clutter model, noise model, sum channel directional pattern of antenna model, difference channel directional pattern of antenna model, sheltering model, rcs model, glint noise model, etc. the second section studies signal processing of pulse doppler radar seeker, and establishes radar signal processing mathematical model and data processing mathematical model for simulation, including windowing, doppler filtering, envelope demodulation, pdi, cfar, centering, velocity tracking, angle tracking, a - b filtering, etc. the third section studies the modeling of modified proportion guiding, and establishes guiding model, then dynamic simulation results is provided
論文的主要工作包括四部分：第一部分研究了脈沖多普勒雷達導引頭的信號建模問題，建立了雷達信號模型，主要包括：發射信號模型、接收信號模型、目標回波信號模型、雜波模型、噪聲模型、和差通道天線方向圖模型、遮擋因子模型、接收機噪聲模型、目標雷達截面積統計性模型、目標角閃爍模型等。第二部分研究了脈沖多普勒雷達導引頭的信號處理模式，建立了信號和數據處理模型，主要包括：加窗和多普勒濾波、包絡檢波、檢波后積累、頻域cfar處理、速度定心、速度跟蹤、角跟蹤、 ?濾波等，然後給出了信號處理流程。La dead reckoning algorithm has been developed based on the doppler velocity log ( dvl ) and fiber optic gyrocompass. 2. since the basic kalman filter will become lapsed, strong tracking filter theory has been inducted, and a new strong adaptive kalman filter algorithm has been developed. further more an adjust gene has been imported, and gets a new arithmetic
針對傳統的卡爾曼濾波演算法中由於噪聲統計特性未知而容易引起的濾波發散的缺點，引入強跟蹤濾波理論，提出了帶次優漸消因子的擴展卡爾曼濾波演算法，並進一步對該演算法進行改善，加入了調整因子，使濾波演算法得到較好的改善。Appropriate data compression methods are needed to assure the random nature of the information source and to enlarge its entropy. in this thesis, first, we present the theory of sess system, then the acquisition method of sess system is discussed in detail, finally, a acquisition model of sess system is built and simulated in the awgn channel, in the raleigh fading channel and in multi - address interfere condition. the simulation results show the acquisition method of sess system can be just as reliable as the conventional dsss systems
本文首先對自編碼擴頻通信的基本原理，自編碼擴頻序列的產生方法及其產生的序列的特性進行了概述，然後詳細討論了直擴通信系統中的擴頻碼的捕獲跟蹤問題，根據自編碼擴頻通信的特點，設計了其捕獲跟蹤方案，並在加性高斯白噪聲通道、瑞利衰落通道和多址干擾情況下進行了模擬。However, adaptive equalization technique can decrease the effect of isi and noise, reduce the bit error ratio and trace time - changing channel
而自適應均衡技術可以降低碼間干擾和噪聲的影響，減少誤碼，並能夠跟蹤時變通道，解決時變波形的嚴重失真問題。The experiment indicates that the algorithm can suppress noise effectively and adapt to the variation of the illuminating condition robustly. 2
實驗結果表明演算法可以有效抑制噪聲，能夠穩定地跟蹤實際環境中自然光照條件的變化。For linear tracking systems with disturbance, design constraints are formulated by two proposed basic information conditions for efficient tracking
針對有噪聲干擾的跟蹤系統，提出兩個以有效跟蹤為目的的「基本信息條件」 ，闡述跟蹤控制系統內在的設計約束。Firstly, a fourth - orders statistic hypothesis testing in inter - frame difference is used to automatically separate the moving areas from the background in a general video sequence. secondly, change areas are extracted as markers of the corresponding moving object. using the marker, region - growing algorithm can locate the precise boundary of moving object
（ 3 ）基於輪廓跟蹤；首先介紹了提取初始模板方法?基於高次統計的判決演算法，通過選擇合適的背景噪聲閾值，最終得到較好的結果，然後對於後續幀中的邊界提取，提出將灰度圖像所使用的區域生長方法進行改進，即將它們運用到彩色圖像中，通過選擇合適的生長規則，得到較好邊界圖。With the development of reducing noise technology and the advent of quieter targets, sonar faces up to the challenge of low signal - to - noise ratio detection while high detection performance is demanded by weapons ' s increasing range. moving target detection is two of first and last of sonar " four main tasks : detection, loacalization, classification and tracking / motion analysis of targets, which is the base of other two functions
隨著降噪技術的發展，安靜型目標的出現，聲納技術面臨低信噪比的挑戰，武器射程的增加又對聲納提出了更高的要求，關繫到聲納的四大功能（檢測、定位、識別和跟蹤/目標運動分析）第一和第四個的運動目標檢測任務重大，因為它對其餘兩個起著基礎性的指導作用。In the non - gaussian filtering algorithm, the measurement errors incorporating the multipath effects are modeled as the non - gaussian noise, and the filter are modified according to the score function. this algorithm, designed to track low - elevation targets, avoids the degrading of me performance because of ;. c non - gaussian noise in the filter
在非高斯演算法中，由於多徑誤差的影響，目標高度方向上的測量誤差表現為非高斯噪聲，首先建立觀測噪聲的非高斯模型，然後利用非高斯噪聲下的濾波演算法跟蹤低空目標。The simulation results have illustrated that the command following, noise - suppressing and disturbance - rejection specifications as well as stability - robustness specifications of the control system can meet the requirements
模擬結果表明發動機控制系統的指令跟蹤、噪聲抑制和抗干擾以及性能魯棒性等方面的性能良好，滿足要求。分享友人