擬似測量 的英文怎麼說
中文拼音 [nǐsìcèliáng]
擬似測量
英文
quasi measurement-
The approximation analysis result of band dipole model is obtained on the basis of the theory of mfl. the electromagnetic distribution feature of the defect in the steel panel is studied by means of simulation. the leakage magnetic distribution of the two defects and four defects plural and the defects in the column differently in the width are also assayed. conclusions that factors affecting flaw magnetic leakage to the panel also affect the column and magnetic leakage bx should be the feature of the flaw identification to several flaws are drawn
在對漏磁檢測原理進行詳細介紹的基礎上，得出了帶偶極子模型的近似解析解，並以有限元數值模擬分析為主要手段，以鋼板上缺陷為對象，分析了各因素對缺陷漏磁場產生影響的不同規律，同時模擬分析了板上平行的兩條裂紋，四條裂紋以及柱體上寬度不同時的裂紋的漏磁場分佈特徵，得出結論:影響板上缺陷漏磁場的諸因素會對柱體上缺陷漏磁場產生同樣的影響;對于多條裂紋，宜用漏磁分量bx作為缺陷識別的特徵量。We collect distributing of near - field of optical switch output - port. using gaussian curve fit, we measure the extinction ratio of " bar channel " is 8db, and the extinction ratio of " cross channel " is more than 18db
利用紅外攝像機採集的光開關輸出的近場分佈，採用對場光場能量高斯擬合的近似方法，測得該關注入光開關的直通端的消光比可以達到8db ，而反射端的消光比則至少可以達到18db以上。Due to the short distance among the planes which fly in a group, the conventional low resolution radar can not distinguish them in both distance and azimuth ? if we use the technology of isar to resolve the difference among doppler frequency of the targets and obtain a fine resolution cross - cross image, we may separate them, but a long time of coherent processing is needed <, for the formation targets, it can be approximately divided to rigid body and nonrigid body, so for the formation targets, that can be regarded as rigid which has a relative position and an identical movement, can be approximately considered as a large target, and be compensated by translational phase with the rule of minimum entropy, but for the most those cannot accord with the approximation of rigid, being the doppler - frequency of the aim is linear changed, by the relax method with short data, increases the resolving performance of multiple target to the aim in the frequency domain, since cross - range resolution is based on the accumulative time, so it is greatly improve the resolution to formation targets by the instant cross - range image which produced by radon - wigner transformation
低分辨isan成像及干涉技術應用研究一因此直接無法分辨編隊目標的架數，我們借鑒isar的技術，通過較長時間的相干積累，在多普勒頻域上對目標進行分辨。而對于編隊目標，可分為近似剛性的多目標和非剛性的多目標，所以對于可以近似為剛體的編隊目標相對位置固定，運動方式一致，可以近似看作一個大目標，採用最小墑準則對平動相位的進行補償，但是大多數並不滿足剛體近似的編隊目標，由於目標在相干積累時間的多普勒頻率近似呈線性變化，通過對較短數據利用relax的時頻分析方法，提高了頻率域上目標分辨的性能。由於橫向解析度取塊于橫向積累時間，所以利用radnwigner變換得到瞬時的一維橫向距離像大大提高了對編隊目標的分辨，對模擬和實測數據的大量分析結果表明此方法的有效性和可行。Based on the data recorded of the highest water level in the three survey stations of huangpu river, we give out the parameters estimates by using the eight estimate procedures mentioned above respectively, then we calculated corresponding values of likelihood and goodness - of - fit. we reach the conclusion that maximum - likelihood method performs better and more stable than the others
本文基於黃浦江三個水文觀測站的歷年最高水位資料，分別利用這八種估計方法，求出了參數估計值，然後分別計算似然函數值和擬合優度度量值w ~ 2 ，對這八種方法進行了比較分析。The maximum likelihood registration algorithm based on earth - centered earth - fixed ( ecef ) coordinate system considers the geometry of the global, and eliminates errors introduced by the stereographic projection. the simulation result based on this registration algorithm shows that the satisfied angular biases can be preliminarily obtained. 5
基於地心坐標系的傳感器極大似然配準演算法考慮到了地球曲率的影響，克服了立體投影法的缺陷；採用這種演算法，我們可以把不同傳感器局域坐標系的量測轉化到地心坐標系中，變成統一的量測，便於融合中心做進一步的處理；模擬結果表明這種演算法可以得到較為滿意的角度偏差。The second chapter is about model experiment study, it introduces purpose, scheme, equipment and experiment contents having copperplate and copper ball as object by comparability rule experimenting plenty of physical models, deals with experiment data and makes second field attenuation voltage curves first field isoline both single aperture and mutli - aperture in different situation. in the end, it obtains best depth of multi - aperture source
利用相似性準則進行大量的物理模擬實驗，實驗觀測中以銅板和銅球作為目標體，詳細介紹了模擬實驗研究的目的、方案、使用設備以及實驗內容，並對實驗數據進行了處理分析，作出了不同模擬條件下單、多孔徑的二次場衰減電壓曲線和一次場等值線圖，找出多孔徑作發射源的探測最佳深度。Because the system error is ineluctable for mode, it is necessary to correct the simulation fielde effectively. in this paper, based on the idea of combined eof correction, the interannual simulation of sea surface wind stress anomalies of the tropical pacific ocean by lap two - level atmosphereic model have been corrected, result of corrected erperiment shows that the corrected field is more similar to the observation field, especially on the distribution of the space. three prediction experiments also shew that correcting scheme of combined eof can improve the interannual prediction veracity of model
在本文中，基於「聯合自然正交展開誤差訂正」的思想，將中科院大氣物理研究所兩層大氣環流模式輸出的熱帶太平洋海表風應力異常的跨年度模擬場進行訂正，訂正試驗的分析結果表明，訂正後的熱帶太平洋海表風應力距平場與相應觀測場年際變率分量的相似程度遠遠好於模式模擬的結果，尤其是在空間分佈方面的改善非常顯著；三組跨年度訂正檢驗結果也表明，訂正後的跨年度預測結果明顯好於模式的預測結果。The key factors to make the slide is controlled to make the model be similar in geometry, material and fabric with the antetype, then simulate the infection of river, digging of road and so on, measure the data of the distortion of model, analyze the reason of the distortion and factors of the slide
試驗抓住造成滑坡的主要因素，根據所得的巖石力學參數及結構面參數，在幾何條件、模型材料、結構面條件等方面都基本滿足相似原理的情況下，對模型進行了河流下切、公路開挖等條件的模擬，測量觀察邊坡的卸荷回彈與層面的彎曲變形情況，利用所側數據分析論證滑坡的形成機制和影響因素。Using a simulation of physical model and according to the analogical principle, a simplified double - layer model of the surface and roadbed of concrete highway is established, practical methods of distinguishing the reflected ultrasonic wave, measuring the velocity of the reflected ultrasonic wave and the time parameter, which the ultrasonic wave takes from leaving source to the received by receiver, are put forward
摘要利用模擬物理模型，並根據相似性原則建立起公路路面和路基的雙層簡化模型，提出了一種準確識別反射波，測量反射波速率及走時參量的實用方法。Based on the analytic analysis of the linear synchronous motor ’ s layered model, the paper deducted the composing of air gap magnetic fields and the analytic expression of levitating and advancing force. these results provide theoretic guidance not only for the analysis and measurement of the vehicle ’ s air - gap magnetic fields but also for the eatablishment of the
採用各向異性介質近似模擬齒槽區域，並引入定子和轉子等效電流層的概念，建立了直線同步電機的磁場分層模型，在此基礎上得到了氣隙磁場的組成以及懸浮力和推力的解析表達式，為氣隙磁場的分析和測量以及列車運動情況下電磁力軟測量模型的建立提供了理論指導。An on - line minimum - variance estimator was developed for thrust acceleration applied to orbit transfer using discrete - time radar measurements. the mass - flow - rate of propellant was selected as a state variant, which was estimated by employing an integral state model and ekf filter. the variation equations for measurement vector to mass - flow - rate have been established to linearize the discrete - time measurement equations. the algorithm has applied successfully to maneuver process in commanding satellite into geo - stationary orbit. the results show that the algorithm developed here can monitor and determine whether engine works well or failure precisely and quickly during orbit transfer process
飛行器軌道機動過程中，為跟蹤、定位機動目標和干預機動控制過程，需要統計處理離散的雷達觀測量實時估計推進發動機的推力，進而確定飛行器的瞬時軌道參數.本文所述演算法是該工程問題的探討和解決方案.文章建立了軌道機動過程中連續變質量運動模型和離散雷達量測模型，推進發動機的質量秒耗量作為表徵推力加速度的一個近似常量，應用擴展卡爾曼濾波對離散的雷達測量數據進行順序統計處理給出秒耗量的最小方差估計;文章詳細地推導了線性化量測模型的變分方程和觀測矩陣;模擬結果表明該演算法能快速、準確地估計推進發動機的質量秒耗量和向機動目標施加的實際推力It simulates human ' s behavior in the process of conventional experiential quotation, and quantifies the useful information of a new die part and a series of correlative die samples accumulated in the foregone quotation experience by fuzzy membership, and then compares the similarity between the new part and the samples after computing their fuzzy level of approximation to find three of the most similar samples, based on which the producing cost of the new part is estimated by exponential - smoothing - method
本文提出的模糊相似比較法和工時法相結合的模具報價方法，就是模擬傳統的經驗報價中人的報價行為過程，利用模糊理論中的模糊隸屬度來量化新工件與原有的在以往生產實際中積累的一系列相關模具樣本的有用信息，計算它們之間的模糊貼近度，進行相似度比較，找出與新工件最相似的三個模具樣本，在此基礎上利用預測技術中的指數平滑法估算出新工件的生產成本。This dissertation concentrates on the difficult problems that the pipeline or pipe defects are not estimated or evaluated quantitatively, intelligently by mfl ( magnetic flux leakage ) inspection method. from the practical demand, theoretical analysis and experiments or testing, the mfl inspection technology of pipeline or pipe defects are explained, summarized in detail in the whole paper, at the same time, the relationship between the mfl field distribution, the mfl signal shape and the defect geometry or severity, the analysis of the mfl data and the compensation of influencing the relationship factors, signal feature extraction, intelligent recognition of defect parameters and so on are studied systematically
論文針對管道（鋼管）缺陷漏磁檢測定量化、智能化的難題，緊密結合檢測現場實際需要，通過理論分析和大量實驗，系統分析總結了管道（鋼管）缺陷漏磁智能檢測技術，並在缺陷漏磁場分佈以及缺陷漏磁信號與缺陷外形參數間的關系、缺陷漏磁信號分析、漏磁信號影響因素補償、缺陷漏磁場波形特徵提取和缺陷外形尺寸定量識別等方面進行了深入研究，主要成果和創新如下：引出磁偶極子模型近似分析常見缺陷漏磁場，針對磁偶極子模型的不足，將有限元方法應用到缺陷漏磁場分析，實現了常見管道樣本缺陷漏磁場的模擬。To fulfill the need of the application of rp technique in medical domain, reverse cad modeling from medical cross sections is systematically studied in this dissertation. firstly, some algorithms related to the research of this dissertation are studied. new algorithms for orientation and inclusion test for simple polygon, an error constrained automatic faring algorithm for b - spline curve and a theorem regarding the termination criterion for subdivision of triangular bezier patch are proposed
本文針對rp技術在醫學領域應用的需要，系統研究了基於醫學斷層輪廓數據的反求cad建模理論和方法： （ 1 ）在基礎演算法研究部分，提出了簡單多邊形方向及點在多邊形內外判斷的新方法、三角b zier曲面片離散的誤差控制定理和一種帶誤差約束的b樣條曲線的自動光順方法； （ 2 ）提出了一種基於相鄰層輪廓相似性的醫學斷層輪廓數據曲面重構方法； （ 3 ）提出了一種稱為「虛擬測量」的曲面模型處理方法。Some valuable conclusions are summarized by theoretical analysis and simulation experiments : from the side of signal processing, pulse jamming can be deleted by the method of time - domain sliding window accumulation and can be restored by interpolative prediction. ; gauss white nose can be attenuated while jamming disperse point - target by the method of time - frequency analysis in time - frequency domain. ; radio frequency noise jamming can be deleted by the method of average range frequency spectrum and notching in frequency domain
通過大量的理論分析和模擬實驗，得到了一批具有一定價值的結論：從信號處理的角度出發，對于脈沖式干擾，能夠運用時域滑動窗口積累的方法去掉，並且通過預測插值得到較好的恢復；對于高斯白噪聲干擾，在時頻變換域內應用時頻分析方法可減小其對分散點目標的干擾；對于射頻噪聲，通過平均距離頻頻法和頻域陷波的方法可以去掉；從改變合成孔徑雷達系統角度出發，類似雙基地雷達能夠避免各種干擾，對發射信號進行調幅，調相以及改變調頻斜率都是較好的抗干擾方法。Main contents as follows : a series of concepts and theorem involved in the paper on chaotic dynamical systems are discussed, such as dynamical systems, optimization arithmetic, phase space & orbit, li - york law, chaos control and so on. in order to understand chaos theory, chaotic evolving law of logistic equation is addressed in detail. logistic equation is a simple nonlinear dissipative system
包括： （ 1 ） logistic非線性迭代方程的分岔； （ 2 ）分岔圖的標度性和自相似性； （ 3 ）一維lyapunov指數計算方法； （ 4 ）控制參量對系統演化的作用； （ 5 ）初值敏感性數值模擬； （ 6 ）其它幾種非線性系統的混沌演化特性測試。A batch least - squares maximum likelihood estimator is employed to calibrate the model coefficients of accelerometer and a polynomial post - fit method is used to establish temperature models of these coefficients. the temperature models of accelerometer bias and scale factor of accelerometer are established between - 20oc and 50 oc. after compensating the temperature error by using these models, the post - fit residuals of the accelerometer output have been improved to 10 ? 5 g, and the trend term of accelerometer changing with temperature basically vanished
採用最小二乘極大似然估計和多項式擬合的方法，分析加速度計靜態模型系數隨加速度計殼體溫度變化的規律，建立了- 20oc 50oc之間加速度計零偏和標度因數誤差的溫度模型，應用該模型對加速度計溫度干擾進行補償，補償后，加速度計輸出的擬合均方根誤差一到二個數量級，並且基本上消除了加速度計輸出隨溫度變化的趨勢項，使得加速度計測量精度得到了明顯提高。This paper designs a measurement system and measures the main properties of power line practically. the characteristics of power line are analyzed in detail, and a power line channel model is presented which consists of the parametric transfer function model and the simulating model of background noise, narrow noise and impulse noise. simultaneously the simulating method on the computer is presented
本文設計了一個測量系統對實際電力線通道的主要特性進行了測量，詳細分析了電力線的信號傳輸特性和噪聲特性，給出了一個實用的室內電力線通道模型，包括參數化的傳輸函數模型以及背景噪聲、窄帶噪聲和脈沖噪聲的近似模型，並給出了計算機模擬實現方法。It is proved by computer simulation that the rms error of this new arithmetic is just almost 1 / 5 of that using the mean arithmetic
通過計算機模擬計算，表明新演算法的微波相位差測量結果的均方根誤差，近似只有平均演算法的1 / 5 。The precision and convergence of both rotor speed and flux estimation with ekf largely depend on the accuracy of the models of system noise and measurement noise. a global optimized noise covariance estimation method based on genetic algorithms ( ga ) is applied to ekf in foc system, a ga training simulation system of optimal parameters of ekf is given and the simulation results proves the effectiveness and robust of this algorithms
本文用遺傳演算法（ ga ）對全閉環矢量控制系統中的ekf噪音模型進行離線優化辯識，模擬結果表明， ga尋優到的噪音模型使採用卡爾曼濾波器的無速度傳感器矢量控制系統獲得了與帶速度傳感器矢量控制系統相類似的動態性能，全系統對消息噪音和測量噪音有好的魯棒性。分享友人