標向波 的英文怎麼說
中文拼音 [biāoxiàngbō]
標向波
英文
beacon-
And understanding and studying the spectral features and variation rules of geo - targets in the experimental area, raising that it is the basis of geo - targets information collection with imaging spectrometer data to understand spectral features and variation rules of geo - targets, realizing that in a great extent spectral - integrated - form - based classification method can remove the phenomenon of " different spectrum with same objects " resulted from reflection ratio curve translation because of the angle change among sensor, targets and observation direction, and the average and variance images can be introduced to solve the problem of two kinds of geo - target with similar spectral forms and much different values of whole reflection ratio. it is suggested that " red edge " range bands of vegetation, which has close relationship with vegetation cover and biomass, is the main characteristic bands and important basis for careful vegetation classification and quantitative retrieval, and pixel - based derivative spectral analysis is very useful for removing the effects of soil background values and quantitatively retrieving vegetation biomass and cover. the remote sense quantitative retrieval model is developed for main appraisable factors of desertification monitoring assessment with imaging spectrometer data and then the applicability of model is analyzed
研究結果如下：首先針對荒漠化地區的地物特徵，對高光譜數據不同波段的數據質量、波段組合進行了評價，提出了適用於荒漠化監測的基本波段選擇集；初步了解和掌握了研究地區的地物光譜特性及變異規律，進一步明確了掌握地物光譜特徵和變異規律是用成像光譜儀數據提取地物信息的基礎；發現了基於光譜整體形狀的分類方法在很大程度上能夠消除由於傳感器、地物目標觀測方向之間的角度變化引起的反射率曲線整體平移的「同物異譜」現象，對于譜形相似而整體反射率的值相差較大的兩類地物，通過引入均值和方差圖像參與分類得到解決；研究還表明在植被「紅邊」范圍內的波段是進行荒漠化監測的主要特徵波段，這些波段與植被生物量和蓋度都有密切的關系，是開展精細植被分類研究和植被定量反演的重要基礎；像元的導數光譜分析可以消除土壤背景的影響，是進行植被生物量和蓋度定量反演的有力工具；建立了荒漠化監測主要評價因子的定量反演模型，並分析了模型的適用性。Discussion on standard of critical angle of seismic wave in seismic analysis of complicated structures
復雜結構地震波輸入最不利方向標準問題Interior of the country, a great number of famous groups were threatened by the marketing crisis and marketing failure. as " juren group " fell down, " taiyangshen group " went down, " feilong group " hit the ground and many advertising kings broke down, some of the excellent companies, which had ever presented the market trend, are now sinking into the condemn of general debility or even bankruptcy. since our country takes part in the wto, the competition will turn from the domestic, partial, un - integrate one to the one of international and overall
上個世紀末波及全球的東南亞金融危機，造成東南亞地區的經濟倒退、企業倒閉；在國內， 「巨人」倒下、 「太陽神」下山、 「飛龍」落地、 「標王」破產，一大批知名企業被營銷危機和營銷失敗籠罩，過去曾是領導市場潮流風雲企業，而現在卻陷入虧損甚至破產的困境；隨著我國wto的加入，國內競爭逐步發展為國際的競爭，競爭日漸激烈，市場的競爭將由國內的、局部的、不完整的競爭轉向國際化的、全方位的競爭，市場特點將由國內市場的國際化變為國際市場的國內化，更多的企業將面臨營銷失敗。The relation is given by the target strength and waveform mutational with dividual angle and incident angle. the experiment on the intelligent underwater sail in a water tank is tested, the valuable laws of multistatic target distribution characteristic are obtained
完成了非入射方向模擬目標智能航行器聲散射特性的水池實驗，給出了目標回波的強度和波形隨聲波入射角和分置角的變化關系。The papers whose research object is the 7 - floor frame - structure with isolator - seismic layer, in which the isolator - seismic layer adopt some standard interlayer rubber isolator. by establish a 3 - dimension finite - element modal and use the a nalysis soft - ansys, we can make dynamic analysis on the structure. by analyses we can get some response characteristics of the structure sparked by the normal and rarely earthquake of 8 - degree fortify intensity, by the double - horizons seismic and by the vertical seismic
本論文設計了一7層的具有隔震層的框架結構並以此為研究對象，其中隔震層採用標準件的夾層橡膠隔震墊，通過建立三維有限元分析模型，運用大型有限元分析軟體? ansys對結構進行動力響應彈塑性時程分析，得出了結構在8度設防烈度下的常遇水平地震和罕遇水平地震激勵下的響應特性、在雙向水平地震波激勵下結構的響應特性和在豎向地震波激勵下結構的響應特性。First, based on phased array antenna ' s mono - pulse goniometry and separate coordinate technology about phase control, the antenna beam pointing error formula, caused by phase quantization error, is derived from linear array and circular array to planar array and cylindrical array
首先以單脈沖相控陣天線測角原理為基本理論出發點，利用相位控制的坐標分離技術，基於線陣、圓形陣等簡單形式的相控陣天線，推導了平面陣、圓柱面陣等相控陣天線由相位量化誤差引起的波束指向誤差公式。The specific research methods are listed : 1. matched filter taking the max ouput snr as the best rule correlates nonstop divided signal and divided echo to detect low snr target signal. then all one dimension divided correlation outs and done fft in portrait to leach interferential signal such as static or low rate mussy meaves, many pathway echo and so on and to take target ' s time difference and doppler frequency that combine parameters that target ' s direction taken from antenna and so on to implement target ' s orientation and tracking
具體研究方法如下： 1 、採用以輸出信噪比最大為準則的最佳匹配濾波器來對分段的參考和目標信號作相關處理來檢測低信噪比目標信號，然後對一維分段相關輸出組作縱向傅立葉變換來濾除靜態或低速的雜波、多徑回波等干擾信號，並提取目標的時差和多普勒頻率，再結合由天線獲得的目標方向等參數，就可以實現目標的定位和跟蹤。Vor very high frequency omnidirectional radio range
超短波全方向式無線標識Polarimetric synthetic aperture radar ( polsar ) investigates the transverse vectorial nature of plane em waves and provides the complex scattering matrix of a scatterer. scattering polarimetry is sensitive to the shape, orientation, and dielectric properties of scatters
極化合成孔徑雷達（ polsar ）研究電磁波的矢量特徵，通過測量和分析目標的極化散射特性，獲取目標的介電常數、物理特性、幾何形狀和取向等方面的大量信息。As the vital development of the millimeter wave guidance technology, phased array antennas use electrical control scanning beam, which results to faster scanning velocity, more flexible beam control and higher anti - interference ability. thus it can realize target seeking, tracing, guidance at the same time, and can work in the complex and worsening condition
作為毫米波制導技術的一個重要發展方向，相控陣制導技術中的相控陣天線是採用電控方式掃描波束，掃描速度快、波束控制靈活、抗干擾能力強等，可以同時完成目標搜索、跟蹤、引導等多項功能，能工作在日益復雜和惡化的工作環境中。A novel amplifier chain which is composed of the forward wave crossed - field amplifier ( cfa ) driven directly by solid state amplifier ( ssa ) is better in performances and reliability compared with traditional three stage chain which is composed of " ssa + twta + cfa "
摘要採用固態放大器直接驅動前向波管的新型放大鏈與「固態-中功率行波管-前向波管」三級放大鏈相比較，具有更好的性能指標。Portable multiple beam sonar system is mainly used to survey the underwater terrain of huge reservoir. firstly, the thesis introduces the index of performance. secondly, it explains the ranging principle of sonar system, and simulates the processing procedure on computer, gives the beam pattern
本文首先介紹了地形聲吶的設計指標，然後敘述了多波束地形聲吶的測距原理，並對具體的實現過程進行了計算機模擬，給出了定向波束圖案。Combining the blind beamforming with the estimation of doa, the doa can be estimated at the same time when the source signals are recovered
並將盲波束形成與目標方位估計相結合，實現在捕獲、恢復目標源信號的同時，估計出目標的波達方向。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。The multi - directional wavemaker system could generate very precise multi - directional random waves. the system has passed the expert appraisal organized by the ministry of education. the performance indexes of the multi - directional wave - maker system are consistent with international leading level
多向不規則波造波機系統可以較精確產生斜向波和多向不規則波，已通過國家教委組織的專家鑒定，其主要性能指標達到國際先進水平。A method of underwater target dimension identification was proposed by special bearing distribution data of body target echo based on identification theory of a target bearing method
摘要闡述基於目標方位走向法的目標識別理論，提出利用體目標回波的空間方位分佈信息識別水下目標尺度信息的方法。( 2 ) in order to do more study in sonar localization, detection, estimation, it is necessary to study the special and temporal distribution characteristic of the reverberation, that is the target strength in the negation not incidence direction. in the third chapter, the scattering character principle of bistatic sonar is given
2 ）為了更深入的研究多基地聲納的定位、檢測與估計等關鍵技術，對多基地條件下，目標回波的時間和空間分佈特性，即非入射方向目標的聲散射特性進行深入的研究是十分必要的。Thirdly, the neural network method is extended into multistatic sonar localization. the error figure of the method is described. ( 5 ) in order to investigate the localization, detection and estimate, the sound scattering mechanism of underwater target for multistatic sonar should be fully understood
5 ）為了更深入的研究多基地聲吶的定位、檢測與估計等關鍵技術，對多基地條件下，目標回波的時間和空間分佈特性，即非入射方向目標的聲散射特性進行深入的研究是十分必要的。Standard practice for immersed ultrasonic testing by the reflection method using pulsed longitudinal waves
用脈沖縱向波反射法進行浸入式超聲探傷檢驗的標準實施規程The center of this thesis lies in the third chapter, which explains the ideas of the author about how to eliminate the inner factors that casue the economic fluctuation and how to stimulate the economy with exogenous growth system, which leading to the transition of policy measures from temporary solutions to permanent cures
第三章是本文的核心部分，它反映了筆者的這樣一種思想，即如何利用財政政策來消除引致經濟波動的內在因素，促進經濟內在穩定增長機制的形成，以實現政策手段由治標向治本的過渡。分享友人