main echo 中文意思是什麼
main echo
解釋
美因回聲報-
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。 -
Echo main consultant engineer, dr. mark johnsen is also involved in research of advanced speaker industry. he tends to develop advanced speakers and modern digital home theatre speaker system
「 echo 」總顧問工程師， dr . mark . johnsen亦同時是研究從事民用高級揚聲器工業，至力發展高級揚聲器及當今數碼時代的家庭影院揚聲器材 -
In this dissertation, radar detection in hrr has been taken as background. the followings are main contents of this dissertation : ( 1 ) based on analyzing the targets and the clutter ’ s specific characteristics of hrr radar, the echo models of targets and clutter have been studied respectively ; the changes of targets ’ echoes in different elevation angles, azimuth angles and attitude angles have been analyzed ; then, the echo models of lfm radar clutter have been established
本文針對高距離分辨雷達目標檢測開展研究，主要完成了以下幾方面的工作: （ 1 ）分析了高距離分辨雷達目標和雜波回波特徵，在此基礎上分別研究了高距離分辨雷達目標和雜波的回波模型，分析了不同俯仰角、不同方位角以及不同姿態下目標回波模型的變化，並建立了線性調頻脈沖壓縮雷達的雜波模型。 -
Through analyzing the spinning echo, the arithmetic of " estimation of signal with polynomial phase " is adopted to estimate parameter of echo ' s phase. then the influence of high step phase pro duced by spin is removed. the one - dimension range - profile can be renewed by this arithmetic and the good effect is showed by the result of simulation in chapter v, the main works of this dissertation are summarized and the future researched areas are pointed out
通過對自旋目標回波的分析，本章採用了「多項式相位信號系數估計」演算法對回波相位進行參數估計，可以去掉旋轉產生的相位高次項影響，從而恢復給出目標的一維距離像，模擬實驗表明本演算法取得了好的效果。 -
In this paper, the main problem is to detect the position and velocity of moving target by fractional fourier transform which could be concluded by three parts, the echo model establishment of moving target, the realization of fractional fourier transform and parameters estimation of moving target, detailed contents are as follows. firstly, the paper analyses the echo model of sar static target and introduces a kind of sar imaging algorithm, range - doppler ( r - d ) algorithm
本文的主要內容包括三個部分，即動目標回波模型建立、分數階傅立葉變換的實現和動目標參數估計，具體來說，其內容如下:首先，本文研究分析了合成孔徑雷達靜止點目標的回波模型並介紹了一種基本的合成孔徑雷達成像演算法? ?距離-多普勒（ r - d ）演算法。 -
The thesis comes from the double - side turntable die spotting press project cooperated by npu908 with shannxi forging and rolling equipment works. the main work is studying high - accuracy position control system of double - side turntable die spotting press. the system uses proportional orientation valve with high echo performance
課題來源於九零八教研室與陜西壓延設備廠聯合研製的1000kn雙側翻轉模具研配壓機這一實際工程項目，論文主要研究內容是研配壓機的高精度位置控制系統。 -
To idiographic institution, the main causes of the debts forming are as follow : the finance rights and affair rights are digit in the process of the finance and tax system, the finance rights are up collecting, and the affairs rights are down moving, the finance gap formed in the process of the finance and tax system, the comparative economic shrink in the anaphase country reform, the finance ingathering became fewer : the political and the administration system reform is disjoint to the economic system reform, the village and town government financial action is lost echo obligation, the expenditure break through the budget, and so on, otherwise, the country financial system reform is lag, the invests are becoming bad for the country government intervention to economic field, the country government action is short of efficient criterion, cut down the centre transferring geld to the farmers and delay to carry out the legal payment ; the effective supervision to the loan is short of about national to the non - financial machine, and so on, so the debts form at last
但從根本講，還是制度的原因，是國家通過制度的安排來對利益進行重新分配，導致鄉鎮政府財政收入短缺，產生債務需求，最終形成債務。從具體的制度上看，主要有:財稅體制改革中的財權與事權的錯位，財權向上集中、事權不斷下移;農村稅費改革產生財政缺口;農村改革後期出現的經濟相對萎縮，財政收入減少;政治制度和行政管理制度改革與經濟改革脫節，鄉鎮政府財政行為失去應有的約束，導致開支突破預算等等，產生債務需求。另外，農村金融體制改革的滯后;鄉鎮政府對經濟領域的高度介入，出現經濟投資虧損;政府行為缺乏有效規范，截留老百姓的轉移支付款項、拖延履行法定支付義務;國家對非金融機構借貸行為缺乏有效監管等等，產生債務供給。 -
And the main focus is the design, implementation and testing of an adaptive line echo canceller and a vocoder based on multi - band excitation ( mbe ) model
主要工作是設計並實現電話線路自適應回波抵消器和基於多帶激勵模型的語音編解碼器。 -
This is the similar case when the main melody can evoke a strong echo for us with our hands clapping in admiration despite our disability to understand the score of mozart ' s musical pieces
這恰如我們雖然看不懂莫扎特樂曲的總譜，卻照樣能同它的主旋律產生共鳴，擊節稱贊。 -
New algorithm and new structure have been developed to make the equalizer to get better performance on combating with seriously distorted channel fading : strong echo fading, large delay spread static and dynamic echo fading. main contents of this paper are as follow : in the first chapter, the history > present situation of the dtv system is presented. five dtv terrestrial broadcasting systems are introduced and two of them are compared, e. g
本文主要內容如下：第一章概述了數字電視技術的發展歷史和目前的狀況，給出了目前已經成型的5種地面廣播標準；對兩種比較典型的傳輸標準： dvb - t和atsc作了性能對比分析，並將比較的焦點集中到對抗強多徑衰落和長時延的靜態和動態多徑衰落的性能上。 -
The main research work and results can be summarized as follows : 1. analysis of echo signal of lfmcw radar, including beat signal of single - target and multi - target. 2
本文的主要工作包括:對lfmcw雷達回波信號（單目標差拍信號和多目標差拍信號）進行了分析;對lfmcw雷達模糊函數進行了分析。
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