波法線速度面 的英文怎麼說
中文拼音 [bōfǎxiànsùdùmiàn]
波法線速度面
英文
wave normal velocity surface- 波 : Ⅰ名詞1 (波浪) wave 2 [物理學] (振動傳播的過程) wave 3 (意外變化) an unexpected turn of even...
- 法 : Ⅰ名詞1 (由國家制定或認可的行為規則的總稱) law 2 (方法; 方式) way; method; mode; means 3 (標...
- 線 : 名詞1 (用絲、棉、金屬等製成的細長的東西) thread; string; wire 2 [數學] (一個點任意移動所構成的...
- 速 : Ⅰ形容詞(迅速; 快) fast; rapid; quick; speedy Ⅱ名詞1 (速度) speed; velocity 2 (姓氏) a surna...
- 度 : 度動詞[書面語] (推測; 估計) surmise; estimate
- 面 : Ⅰ名詞1 (頭的前部; 臉) face 2 (物體的表面) surface; top 3 (外露的一層或正面) outside; the ri...
- 波法 : borda count
- 速度 : 1. [物理學] velocity; speed; blast; bat 2. [音樂] tempo3. (快慢的程度) speed; rate; pace; tempo
-
The following algorithms have been proposed and tested in the thesis : 1 frequency selective fading : combine the isomorphism between the input space and the output space and propose a new approach to blind equalization of the channel. compared with conventional methods, the new approach offers lower computational complexity, better performance, and more robust against the over - determination of the system order ; 2 time selective fading : a new approach to the equalization of time selective channel based on the zero - forced equalizer is proposed which is more simple in its structure of algorithm ; 3 time - varying channel : using the instantaneous mean value changes of the output signal to extract the information of channel variations and model it using ar model, kalman filter is then employed to track channel variations, it bears faster ability in tracking the variation of tv channels ; based on the isomorphism between the inputs and the outputs and some of the approaches using in mimo system, a new algorithm of equalization of simo time - varying channel is proposed, which also share the merits of being robust against the over - determination of the system order ; model the time - varying channel using the multi - resolution decomposition wavelets, and then a blind identification method based " on the model is proposed ; at last, a new model for equalization and identification of mimo system is proposed
主要工作在以下幾個方面: 1 、針對頻率選擇性衰落通道:結合輸入輸出空間同構關系提出一種新的頻率選擇性通道均衡方法,與傳統方法相比,該方法計算量更小,收斂速度更快,性能更優,且對系統階次的過確定表現穩健,具有實際均衡應用價值; 2 、針對時間選擇性衰落通道:提出一種基於迫零均衡的時間選擇性通道均衡方法,演算法結構簡單; 3 、針對時變色散通道:利用瞬態均值曲線提取通道時變信息,對之ar建模,利用卡爾曼濾波器跟蹤時變通道抽頭變化,可以快速跟蹤通道變化;基於輸入輸出空間之間的同構關系以及多輸入多輸出系統的處理方法,提出了新的單輸入多輸出色散時變通道均衡與識別演算法,同樣具有對通道階次過確定保持穩健的優點;結合小波多解析度分析提出一種基於小波模型的通道盲識別演算法;研究時變的多輸入多輸出系統的盲均衡與盲反卷積問題,給出一種時變系統處理模型。With a purpose to provide basic data or figures for the feasible research of a project construction and its planning, taking the practical project of preselecting a factory location for an instance, using the principle and method of shallow seismic reflection, based on the area conditions, differences in physical features and disturbance, with experiments on typical sections of the construction area, one can draw reasonable measuring lines, choose right modes of producing and receiving waves, conduct primary and precise computer data processing, acquire a distinct reflected wave section from a shallow depth and explore the stratum structure in the preselected location and the distribution of longitudinal waves
摘要結合某重大工程預選廠址項目的工程實例,利用淺層地震反射波法的原理和方法,根據現場的場地條件、物性差異和干擾情況等,結合典型地段的試驗,合理布置測線,選擇恰當的激發和接收方式,進行初步和精細的計算機資料處理,可以得到清晰的淺層反射剖面,準確地查明了預選廠址的地層結構和縱波速度分佈,為工程建設的可行性研究和規劃提供了基礎資料。In the design of four - bar linkages driven by motor, the mass - distribution is used to counteract the fluctuation of system and improve the performance. at the same time, this paper applies an adaptive neuron pid controller for nonlinear time - variable system. it efficiently lessens the fluctuation, accompanying with mass - redistribution
在電機驅動的平面四桿機構設計中,首先對機構進行質量平衡,這不但減小了速度波動,而且也簡化了狀態方程;再針對系統的狀態方程非線性、時變特性選用單神經元自適應pid控制器的方法,有效的消除了系統的速度波動。In data sampling circuit, high - speed, complex programmable logic device cpld technique is used. high - speed double - port ram, control sampling time sequence logic, cpu interfaces and bus circuit are implemented in cpld. sampling speed is up to 80mhz, sampling depth is ik - byte, and cpld can fulfill the requirement of the software arithmetic to sampling
在數據採集電路中採用了高速復雜可編程邏輯器件cpld技術,晶元內設計有高速雙埠ram 、控制采樣時序邏輯及cpu介面、總線等電路,采樣速率高達80mhz ,采樣深度1k位元組,很好地解決了超聲波微位移傳感器軟體演算法對采樣的要求,並可實現在線升級,大大提高了系統的整體性能。To deal with the echo information from doppler weather radar, in this paper we recommend the processing of some radar products ( cr, vcs, cappi, vil, wer, vwp ), according to the research of nim on weather radar, referred to other advanced algorithm of radar products from home and abroad and combined with the requirement of application in our country. these products are produced on the platform of windows 98 or windows 2000 by the use of visual c + +
為了對多普勒天氣雷達的回波信息(包括強度、徑向速度和速度譜寬)進行加工、計算和處理,本文根據南京氣象學院在天氣雷達方面的長期研究積累,同時借鑒其他國內外先進的天氣雷達產品的演算法,結合我國氣象業務應用的要求,對多普勒天氣雷達的氣象產品(組合反射率因子、任意垂直剖面、等高平面位置顯示、垂直累積含水量、弱回波區顯示、 vad垂直風廓線等)進行工程化設計。Firstly the phase is extracted from interferogram by filtering and displacing frequency spectrum. then the wavefront and the line integral density are recovered by using fft or polynomial fitting method. lastly the radial local density distribution is calculated from the fitting curve of line integral density by the abel inversion
首先對干涉圖進行頻譜濾波,用頻譜移頻法從干涉圖中提取相位,然後用快速傅立葉變換或多項式擬合實現波面重建,計算線積分密度,再利用abel積分變換從線積分密度的擬合曲線中反演徑向體密度分佈。It is constructed that radial impact and rubbing dynamics differential equations of the rotor system having the nonlinear rigidity on the unsteady and non - linear oil film. the bifurcation and chaos behavior of impact and rubbing fault rotor system caused by the parameters of nonlinear rigidity, rotor rotating speed, eccentric mass is analyzed, in the numerical value analysis method. the bifurcation diagrams, maximum lyapunov exponent diagrams, poincar maps, phase plane portraits, trajectories of journal center, time - history curve, amplitude spectra diagrams of the rotor motion are used
( 2 )建立了具有非線性剛度的轉子系統在非穩態非線性油膜力作用下的徑向碰摩動力學微分方程,並應用含高階余項的非線性動力方程的線性化數值法研究了此類系統響應的復雜動力學行為,利用轉子響應的分岔圖、最大lyapunov指數曲線、 poincar截面映射、時域波形、相軌線、軸心軌跡、幅值譜等圖形分析了系統響應的周期運動、擬周期運動、倍周期分岔、混沌等運動形式的轉化與演變過程,重點研究了非線性剛度、轉子轉速、偏心質量等系統參數對碰摩故障轉子系統的分岔和混沌行為的影響。It shows that the resolution of the crust interface ' s shape on this four profiles is very good, nevertheless that of the velocity structure is relatively poor. the crust and upper mantle ' s fine configuration on the hq - 13 profile is obtained by our tomography, which reveals some important structure and dynamic features of this region : the velocity structure of the crust consists of three layers, the upper crust, the middle crust and the lower crust. however it also can be divided into six lateral blocks, each of them " s velocity is always higher or lower than that of its neighboring blocks
本文第五章利用有限差分反演和射線反演的方法獲得了符離集?奉賢地震測深剖面( hq - 13線)精細的地殼上地幔結構剖面,揭示出下揚子地區一些重要的結構和動力學特徵:地殼速度結構在縱向上大致可分上地殼、中地殼和下地殼三部分,橫向上可劃分為6個塊體,各塊體的p波速度沿測線方向呈現高速?低速?高速的組合。In this dissertation, the research trends for the problem have been introduced ; the ‘ dim ’ and ‘ point ’ has been strictly defined in mathematics from machine vision and human vision ; the ideal clutter suppression system based on clutter predication and the realization and evaluation of evaluation index has been studied, in succession the clutter suppression technologies have been researched. firstly, the classic nonparametric algorithm has been analyzed in detail and systematically, for it ’ s weakness that it cannot remove the non - stationary clutter ideally, kalman filter algorithm for clutter suppression in 2d image signal has been built. secondly, fast adaptive kalman filter is presented based on fast wide - sense stationary areas partition algorithm : limited combination and division algorithm based on quarti - tree algorithm, new taxis filter route algorithm which can break through the limitation of the necessity of pixel neighborhood of 2d filter and laplace data model with two parameters which is perfectly suitable for the residual image of kalman clutter suppression
首先分析了經典的非參數法,對於四種具有代表性的核,從前述的三個性能評價方面做了分析和對比,指出了其速度快的優點和對非平穩圖像適應性差的弱點,針對非參數法的弱點,重點研究了對非平穩圖像適應良好的卡爾曼雜波抑制技術:建立了非平穩圖像的類自回歸模型,在此基礎上建立了二維卡爾曼濾波基礎的兩個方程:狀態方程和測量方程;建立了非平穩圖像準平穩區域快速劃分演算法:基於四叉樹法的有限分裂合併演算法;二維空間的基於k排序的濾波路線演算法,突破了空域濾波路線上區域相鄰的限制;在這些研究的基礎上實現了快速卡爾曼估計,實驗驗證了該方法相對逐點卡爾曼估計可以提高運算速度三倍左右;雜波抑制結果表明傳統的高斯性檢驗並不適合卡爾曼估計后的殘余圖像,由此建立了殘余圖像的雙參數拉普拉斯模型,實驗表明其可以完好的吻合殘余圖像的概率密度曲線。By analysis of frequency spectrum based on matlab platform, wavelet method in the application of cutting out a section of inputting earthquake wave was presented. in the process of pseudo dynamic test results, the method of non - dimensional representation and analytic representation of hysteretic curve was provided. the above two methods will help to compare dissipation energy capacity of this structure at the different acceleration peak value stage of pseudo dynamic test more precisely and comparably
通過基於matlab的地震波頻譜分析,說明了小波分析方法在擬動力試西安建築科技大學博士學位論文驗中地震波截取方面的應用;在擬動力分段試驗數據的處理方面,本文將試驗結果的無綱量表示方法以及曲線的多項式擬合法引入滯回曲線的數據處理,這將有助於擬動力試驗不同加速度峰值條件下,各階段結構耗能能力的客觀比較。Second, a parallel adaptive ray - casting algorithm for graphic rendering of cfi is developed. in the computational model of cfi, the line - of - sight integration is difficult to obtain for 3d complicated flow field, because curvilinear grids, multizone curvilinear grids, and other irregular grids that are commonly used in computational fluid dynamics ( cfd ) present interesting challenges, such as the complex shapes of cell regions defined by grid points ; the wide variation in the sizes of cells in different regions of the grid ; and the intersecting or overlapping nature of multi - grids. the parallel adaptive ray - casting algorithm is extremely efficient to solve these problems
并行自適應光線投射法繼承了光線投射法適合於任何形式網格的優點;光線與計算網格的交點自適應地反映了原來網格點物理量的分佈,能夠與數值計算的精度保持一致;圖像平面的自適應演算法使我們不必從每一個像素發出射線,既提高了光線投射法的計算效率,同時又保證重采樣后激波這樣的高頻信息不會損失;將并行處理技術引入計算光學流動圖像生成過程,解決了大規模數值模擬結果的處理對計算速度和內存容量的需求。This paper gives a detailed account of the waveform, matched - filter, fuzzy function, resolution in speed, resolution in range and the capacity of anti - interference of the chirp signal. it deals with several methods to produce chirp signal and the advantages and disadvantages of these methods. it describes the working principle and performance of dds, analyses the phase errors initiated by the phase truncation and proposes a new scheme to solve the error
本文詳細介紹了以下幾個方面:線性調頻信號的波形、匹配濾波器、模糊函數、速度分辨力、距離分辨力及抗干擾能力;產生線性調頻信號的幾種方法並簡要分析了各種方法的優缺點; dds的工作原理、性能指標,分析了相位截斷產生的相位誤差,並提出解決這種誤差的新方案;設計了一個產生線性調頻信號的具體電路。2 ) forward modeling method of refraction first - break in lateral varying velocity media. for layered media, a new forward modeling method of refraction is presented. for more complex near - surface conditions such as mountain areas, a new improved ray tracing method based on shortest path assumption is studied, it has higher accuracy and faster computing efficiency than conventional ones. the method can be used for the forward modeling of complex near - surface media
而對于折射面起伏較大、低速層和折射層速度變化較大的復雜近地表情況,提出了一種改進的最短路徑初至波射線追蹤方法,該方法精度高,計算速度快,適用於任意二維復雜近地表介質(如山地)的初至折射波的正演計算。分享友人