海面回波 的英文怎麼說
中文拼音 [hǎimiànhuíbō]
海面回波
英文
sea clutter-
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。Based on consider hereinbefore, this dissertation discusses several aspects on the problem of the sustainable and optimum exploitation of groundwater resources as follows : ( 1 ) reviewed entirely the origin and evolvement of the concept " sustainable development ", stated and commented the study status in queue on " sustainable development " around national and international range, thorough discussed the science connotation about the concept " sustainable development " ; ( 2 ) looked back and commented across - the aboard some furthest basic concept and proposition related to groundwater resources, put forward self opinions on a few existent mistake points of view and chaos understandings ; ( 3 ) expatiated entirely on the content and meaning of the theory of changeable groundwater resources system, contrast with the traditional methods of groundwater resources calculation and evaluation, combined example to show the application of this theory ; ( 4 ) thorough analyzed the difficult and complexity to forecast the groundwater resources, fully stated the traditional methods of groundwater resources forecasting, pointed out the characteristic and applying condition of these forecasting method, introduced the main ideas and methods of wavelet analysis developed recently, and the matlab software be known as the fifths era computer language, and its accessory wavelet analysis toolbox, applied these methods and tools to analyze the groundwater dynamic curve, adopted the b - j method and morte - carlo method, combined with the theory of changeable groundwater resources system, discussed the new view on the forecast of groundwater resources ; ( 5 ) synthetically analyzed the characteristics and limitations of the present all kind of groundwater manage model, combined mathematical programming mathematical statistics random process and the theory of variation system of groundwater resources on the unite optimum attempter of surface water and groundwater, emphasized how to make the model more nicety, more simple, more practicality ; ( 6 ) analyzed the inside condition and outside condition to assure the sustainable and optimum exploi tation of groundwater resources, the inside conditions are the follows : correct resources idea, scientific methods of resources calculation and evaluation, credible forecast methods of resources, exercisable measures of resources management, the outside conditions are the follows : the development idea of high layer, the transform of manage system, the matched policy and rule of law, the adjusted of economy lever, the improve of cultural diathesis, the boosting up of water - saving consciousness and detail measures, the control of population rising, the prevention and cure of water pollute, the renew and rebuild of ecology ; ( 7 ) scan the sustainable and optimum exploitation of groundwater resources from the high level of metagalaxy, earth system science, and philosophy ; lint out the more directions on groundwater resources
基於以上考慮，論文主要從以下幾方面對地下水資源可持續開發問題進行了比較深入的探討：全面回顧了「可持續發展」概念的由來與演變，對國內外「可持續發展」的研究現狀進行了述評，並對「可持續發展」概念的科學內涵進行了深入探討；對涉及地下水資源的一些最基本的概念和命題進行了全面的回顧和評述，對目前仍然存在的一些錯誤觀點和混亂認識提出了自己的見解；全面闡述了地下水資源變值系統理論的內容和意義，並與傳統的地下水資源計算評價方法進行了對比分析，結合實例具體說明了方法的應用；深入分析了地下水資源預測預報工作的極端重要性和復雜性，對傳統的地下水資源動態預測方法進行了全面的評述，指出了各類預測預報方法的特點及適用條件，對最近二十多年剛發展起來的小波分析技術的主要思想和方法及其應用范圍，以及號稱第五代計算機語言的matlab軟體和附帶的小波分析工具箱進行了介紹，並應用於地下水動態過程線的分析，採用時間序列中的b ? j法，蒙特卡羅方法，與地下水資源變值系統理論相結合，探討了地下水動態資料分析和地下水資源預測預報的新思路；綜合分析了現今各類地下水管理模型的特點及缺陷，將數學規劃、數理統計、隨機過程等與地下水變值系統理論相結合進行地表水地下水或多水源的聯合優化調度，使模型更準確、更實用；對保證地下水資源可持續開發的內部條件和外部條件進行了分析，內部河海人學博卜學位論文前言、摘要、目錄條件主要是正確的資源觀，科學的資源計算與評價方法，可靠的資源預測預報技術，可操作的資源管理措施，外部條件主要是高層發展思路、管理體制的變革、配套的政策法規、經濟杠桿的調節、人文素質的提高、節水意識的增強及具體節水措施、人口增長的控制、水體污染的防治、生態的恢復和重建等;從宇宙科學、地球系統科學及哲學的高度審視地下水資源的可持續開發;指出了地下水資源可持續開發的進一步研究方向。Using an olympic project as the paper analyzes various waveform features in the seismic imaging profiles, which are relevant to different backfills and geologic bodies in complex neritic backfilled areas, a prospecting example
並通過奧運工程勘察實例詳細分析了該方法在復雜的淺海人工回填區域中不同的填入物與地質體在時間剖面上所展現的各種不同波形特徵。Second, the imaging model built here has taken into account the tilt modulation, the hydrodynamic modulation, and current modulations of radar cross section. consequently, it has realized the imaging simulation of four kinds of wakes with the same imaging model. third, the orbital velocity of ocean wave was considered as the basic dynamic factor, and the imaging model calculates the influence on raw data by the wave m ovement according to the orbital velocity
該模型的主要特點是： （ 1 ）它採用了三尺度復合表面模型的思想來計算海面的電磁散射，考慮了中等尺度波對紋波的進一步調製作用，彌補了傳統雙尺度模型的不足； （ 1 ）它考慮了海浪的傾斜調製作用、流體動力調製作用和流場對雷達截面的調製作用，實現了用統一的模擬模型對四種艦船尾跡特徵進行成像模擬； （ 3 ）它把海面長波的軌道速度作為基本的動態成分，並依此來考慮海面運動對sar回波信號的影響。Sea clutter is a kind of spurious echoes that is caused by reflection from rough seas
海雜波是一類假的回波，是由海面的大浪反射雷達微波而引致。For those yearning for activity, choose to visit the many exciting attractions located just a stone s throw away from the resort, such as the end of the earth, yalong bay square, butterfly valley, shell museum and luhuitou park
背依青山連綿起伏，面呈海灣碧波蕩漾，湛藍的海水潔白的沙灘，是您休閑度假的理想去處。近在咫尺的還有蝴蝶谷貝殼館亞灣中心廣場及鹿回頭公園等名勝美不勝收。Multibeam echo sounder system is a kind of sea bed surveying instruments which can work efficiently and accurately its development originally bases on single beam echo sounder this kind of system is very suitable for massive sea floor surveying the technique behind multibeam echo sounder system has achieved its maturity with time passage
多波束測深系統是一種具有高效的、高測量精度的用於海底地形測繪的設備，它是在回聲測深儀的基礎上發展起來的，特別適合於大面積的掃海測量工作。Study achievement appears as following aspects : ( 1 ) yellow river estuary gate river flow and tide flow mixed area is not keep standing deposition status, on special income water and sediment conditions, boundary conditions and oceanic power conditions, this area may on the scour status ; ( 2 ) observed from estuary sediment deposition distributing process : delta and sea offing area sediment deposition vary trend is similar, each part sediment deposition scale varies as wave shape ; ( 3 ) on estuary gate, affect the sediment deposition factors, primary factors are tide prop, the gate widens gradually, estuary gate have branches, brine induced flocculation. this paper study the estuary gate widen, estuary gate have branches to affect the river channel deposition in quantity ; ( 4 ) based on field measured data, for the first time, deduce the estuary sediment deposition and distributing regress formula which can estimate estuary different areas sediment deposition volume ; ( 5 ) this subject demonstrate the estuary delta coastline dynamic balance conception, build the relationship between the estuary income sediment with deposition land area, draw the following important conclusion : when estuary years - averaged income sediment keeps at 345 million tons, the delta coastline may on the dynamic balance status. ( 6 ) this subject firstly brings up estuary sediment optimized control conception, and has the primary study on the macroscopically optimized control conception method
研究認為： （ 1 ）黃河河口口門逕流潮汐區域並非持續保持淤積狀態，在特定的來水來沙、邊界條件和海洋動力條件下，該區域可以處于沖刷狀態； （ 2 ）從河口泥沙沉積分配的過程來看：三角洲與濱海區泥沙的沉積變化趨勢是基本一致的，各部位的泥沙沉積比例變化基本呈波動狀態，且三角洲與濱海區泥沙的沉積比例與來沙量密切相關，基本成正比關系； （ 3 ）在口門處，影響泥沙沉淤的因素主要集中在潮汐頂托、口門逐漸加寬、河口門分汊、鹽水造成絮凝等，本報告主要對口門加寬，口門西妥理工大學工程碩士專業學位論文分漢對河道淤積的影響進行了定量分析: （一扣根據實測資料首次建立了河贖流路泥沙沉積分配的回歸計算式，據此可以預估計算河口不同區域泥沙的沉淤量; 、 5 ）本項研究首次論證了河口三角洲岸線動態平衡的概念，並建立了黃河河口來沙量與造陸面積的相關關系，得出了當河口多年平均來沙量維持在3 . 45億t時其河口三角洲岸線則可能處于動態平衡狀態的重要結論; 『 6 ）本項研究首次提出了河口泥沙優化調控的概念，並對其宏觀優化調控模式進行了初步探討。All of them looked back across the rough sea, looking for their strange captain and his horse.
他們大家都回頭望著波濤洶涌的海面，搜索著他們那位奇特的船長和他的馬匹。On the premise that the basal transducer layout was designed according to the requirements of deep - sea exploring surroundings and technology on the basis of the hardware structure and data collecting ways of interferometric sonar, the echo signal by energy relativity search is analyzed and calculated, altitude data of the tiny terrain on the seabed under real - time irradiation of ultrasonic is gained as to provide parameters of best cutting depth for intellectualization of the seabed mining vehicle timely and promptly
摘要在相干聲納硬體結構及數據採集方式的基礎上，結合具體的深海鈷結殼探測環境和技術要求，確定了換能器基本布局，探討了信號採集與處理方法，利用能量相關搜索法對回波信號進行分析和計算，得出超聲波實時照射下的海底表面微地形高程數據，為海底采礦車智能化開采提供實時、快速的最佳切削深度參數。The advances in the research on coastal disasters, coastal ecological environments, waves and currents, coastal sediments and morphological changes, and coastal structures in japan are introduced by summarizing the papers which were presented in the annual conference on coastal engineering in japan
摘要介紹了日本第52回海岸工學講演會的概況，從海岸災害、海岸生態環境、波浪與水流、海岸泥沙運動與地形變化、海岸建築物等5個方面綜述了日本海岸工程研究的進展情況。An ocean wave passing through deep water causes a particle on the surface to move in a roughly circular orbit, drawing the particle first towards the advancing wave, then up into the wave, then forward with it and then ? as the wave leaves the particles behind ? back to its starting point again
穿過深水的海浪使水面上的一個微粒按照一種近乎圓形的軌道移動，先把微粒拉向前移動的海浪，然後推上波浪，隨著波浪移動，然後? ?當波浪把微粒留在身後時? ?又回到出發點。Higher capabilities were put forward for detection, identification and anti - interference of torpedo in future naval battle. compared with the narrow - band processing, wide - band processing is a new direction for underwater signal processing for its advantages including abundant information of wide - band echo and little correlation of reverberation
未來海戰對魚雷在探測目標、識別目標和反對抗能力方面提出了更高的要求，而寬頻帶回波信號具有攜帶目標信息量大，混響背景相關性弱，利於檢測、識別目標等優點，因此自導系統發展的方向是寬頻帶自導。A new if simulation signal digital model was developed, which has the ability to simulate the ocean return wave noise and the instrument thermal noise. by this simulation data, smle is successfully tested, and the rf ocean return wave simulator also worked correctly. it is difficult for altimeter to realize closed loop internal calibration with a large time - bandwidth product
（ 4 ）提出了雷達高度計海面回波中頻模擬信號的數字模型，該模型具有模擬高度計海面回波噪聲和儀器熱噪聲的功能；基於該模型的軟體模擬器成功的對高度計跟蹤器進行了驗證；同時，該模型模擬的信號應用於雷達高度計射頻回波模擬器也獲得了成功。Progress, though steady, has been slowly, due largely to difficulties inherent in attempts to characterize a random natural phenomenon in terms of a limited set of parameters. for many years, various non - gaussian probability distributions have been offered as models for the amplitude of sea clutter
對海雜波的研究迄今已有50多年，但其實驗數據和理論遠不能令人滿意，還不可能對海面回波的電平（作為雷達參數和海面狀態參數的函數）做出高度準確的預測。It is found that : ( 1 ) for linear slope, redistribution of incoming energy flux in modenumber space depends on both the modenumber of incident waves and the ratio of the slope of incident wave ray to slope of topography ; both the transmitted and reflected energy flux ( only for supercritical linear slope ) focus near one or two modenumbers ; for supercritical linear slope, the energy flux scattering to higher modenumbers becomes larger and the energy flux to lower modenumbers becomes smaller as the slope of incident wave ray comes near to slope of topography ; ( 2 ) for convex slope, energy flux is redistributed in wide - range modenumbers and also show peaks on lower - modenubers and higher - modenumbers ; ( 3 ) for concave slope, energy flux is also redistributed in wide - range modenumbers, but does not show peaks on higher - modenumbers as supercritical linear slope and convex slope do ; ( 4 ) the total energy flux scattering to higher modenumbers is approximately equal to the total energy flux to lower modenumbers for internal waves propagating over both convex slope and concave slope, which means the concave slope is the same efficient to convex slope in scattering energy flux to higher modenumbers ; ( 5 ) for convex slope, the wave ray reflected from near - critical topography can extend to deep ocean and shallow shelf, while for concave slope, the wave ray reflected from near - critical topography can only extend to limited distance, then meet the topography and be reflected again ; generally the shear of the internal waves reflected twice from concave slope is not enhanced while the enhanced shear does also appear before second reflection takes place, the enhanced shear can bring about intense mixing, so internal waves reflected from concave slope can also produce marked mixing near critical slope
3 、內波在凹地形上傳播時，能通量在模態上的分佈范圍也比較寬，但與凸地形和超臨界線性斜坡地形相比，能通量在高模態上的分佈沒有明顯的峰值。 4 、從總的能通量來講，內波在凸地形和凹地形上傳播時，向高模態散射的能通量與向低模態散射的能通若十地形下內波傳播及內潮生成問題的理論解量近似相等，這意味著二者在向高模態散射能通量方面具有同等效率。 5 、凸地形上臨界點附近的反射，反射波的波射線能夠延伸到深海和陸架，凹地形上臨界點附近的反射，反射波的波射線很快遇到地形發生二次反射，一般來講二次反射后回到深海的波動其速度剪切並不很強，但是在進行二次反射之前的區域，速度剪切仍然很強，因而內波在凹地形上的反射依然能夠在地形附近區域，產生強的速度剪切區，誘發混合。This thesis has studied the sar raw signal simulator scheme of distribute targets. by comparing of the theories and designs of in existence simulators and combining of the simulated sar raw data of ocean surface, we improved the former scheme of distribute targets simulator. the new scheme is more flexible than the old one
論文開展了分佈目標回波模擬器的方案研究，對比了已有的回波模擬器的原理和基本方法，並結合作者研究海面sar回波信號的結果，對前人的分佈目標回波模擬器的方案進行了改進，使之具有更大的靈活性。This paper contains a useful smmary of log normal distribution, weibull distribution and the k - distribution. the weibull distribution may well extend to phenomena other than radar including radiation scattered from turbulent or rough surface
對雷達波來說，海面是極其復雜的反射體，關鍵是找出一些合適的參數，以便建立一個描述海浪一回波依從關系的數學模型。Combine with the project " hf ground wave radar supervise sea status " of state 863 project, retrieving wind direction from hf radar doppler spectrum and the showing of wind field, current field, wave field are researched in this paper. the problem of how to represent the sea surface parameters by computer is concerned, too
本文結合863 - 818 - 01 - 02課題「高頻地波雷達海洋環境監測技術」 ，研究了由高頻雷達海面回波提取風向信息和海面風場、浪場、流場信息的計算機表徵方法及其數據傳輸反演和表徵的若干問題。分享友人