過濾近似 的英文怎麼說

中文拼音 [guòlǜjìnsì]
過濾近似 英文
filtering approximations
  • 過 : 過Ⅰ動詞[口語] （超越） go beyond the limit; undue; excessiveⅡ名詞（姓氏） a surname
  • 濾 : 動詞（除去液體雜質） filter; strain
  • 近 : Ⅰ形容詞1 （空間或時間距離短） near; close 2 （接近） approaching; approximately; close to 3 （親...
  • 過濾 : [工業] filter; filtrate; screening; colation; filtration; filtering; lautering; colating; straini...
  • 近似 : approximate; similar; approach; approximation; roughness; propinquity
  1. This kind of two - channels wavelets decomposition methed reconstruct the wavelet coefficients of an image from the radon transform data, and these coefficients were made reverted wavelet transform obtain the original image. wavelets subsampled on the quincunx lattice, which can have cut - off at an angle during the wavelets decomposition

    基於不可分離mra的小波演算法將投影數據進行二維濾波，其二通道的小波分解直接得到小波的近似系數和細節系數，這些系數再經過逆小波變換就得到了最終的重建圖像。
  2. Based on the extensive studies of subtilisin - like protease ( prl ) of metarhizium anisopliae, extracellullar serine protease is suggested to be a key enzyme involved in the fimgal penetration to invertebrates. the investigation of serine protease in the nematode infected by owvtl may help to understand the mechanism of nematophagous fimgi as biological control agents. a 3l kda serine protease was isolated and purified from the liquid culture of h rhossiliensis owvtl challenged with nematode panagrellus redivivus

    本研究利用線蟲誘導下owvt - 1菌株液體發酵，通過粗分級分離、離子交換層析和凝膠過濾層析分離提純了一個分子量為31kda的絲氨酸蛋白酶，生物學測定表明其對大豆胞囊線蟲二齡幼蟲具有致死作用，同時測定了該酶理化特性，酶活力在75附近酶活力最高，隨著ph的增加酶的穩定性升高，與膽堿酯酶具有相似的ph曲線，對特異性底物aape （ suc - ala - ala - pro - glu - pna ）具有作用， ssi和ci - 2抑制該酶的活性。
  3. The equation including the nonlinear dispersion, i. e. the modified nonlinear schrodinger ( mnls ) equation, is a better model. in this thesis, we take mnls solitons as a model for femtosecond soltions. then based on the recently developed direct perturbation theory for perturbed mnls equation, we study the raman self - frequency shift of femtosecond solitons and its suppression by the means of frequency filters. for this purpose, first, we define the physical parameters of mnls solitons ; next, through the direct perturbation theory for perturbed mnls equation, under adiabatic approximation, we obtain the evolving parameters of mnls soliton on our questions and then choose the parameters of frequency filters based on it ; at last, we directly numerically simulated our questions by split - step fourier ( ssf ) method after improving the arithmetic of the differentiation of the nonlinear item for satisfying mnls equation

    本論文以mnls孤子作為光纖飛秒孤子的模型，通過新近建立的mnls孤子直接微擾理論，研究光纖中由拉曼效應引起的飛秒孤子在傳輸中的自頻移，以及通過頻率濾波對自頻移的抑制。為此，首先給出描述mnls孤子的各物理量，然後用mnls孤子直接微擾理論，解析地得到這些問題絕熱近似下的孤子參數演化，並由此選擇頻率濾波的參數，最後用分步傅里葉方法，在對非線性項微商的演算法做出了適合於mnls孤子的改善後，對拉曼效應及頻率濾波進行了直接數值模擬，其中頻率濾波參數用微擾理論確定。
  4. 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
  5. Probably more anxious will be seven american students from cascade high school, idaho, who built the bio - reactor after mr godson heard how they used similar technology to filter water in a nearby lake

    也許會更著急七名美國學生在高中串、愛達荷州、誰建的生物反應黃干兒子聽到后如何用類似技術過濾水湖附近
  6. For the problems arising from the absence of exact dynamics models, the gauss - markov process is used to approximate the un - model acceleration term in the circling orbit dynamics

    利用高斯-馬爾科夫過程近似繞月探測器的無模型加速度，並利用基於unscented卡爾曼濾波估計了探測器的位置、速度及無模型加速度。
  7. At last, the valid data based fast emd algorithm was proposed. chaper five aimed to the requirement of the emd based time - frequency analysis in the field of rotating machinery signal analysis and fault diagnosis. studied the method of rotatory speed prediction to improve the precision of complete period sampling of vibration signals in rotating machinery, then, discussed the phenomenon of mode fission in noise signal anlysis by emd and provided the filter method to weaken the phenomenon. after then, found a process to analysis the signals using emd - based method in the field of rotating machinery signal analysis and fault diagnosis

    第五章針對旋轉機械信號進行emd時頻分析的要求，提出了提高整周期采樣精度的預測演算法和適合於單片機計算的近似公式；論述了模態裂解現象，並通過模擬信號和實際信號的研究，提出了使用濾波技術來減弱模態裂解現象的方法；給出了適合於旋轉機械振動信號基於emd時頻分析的工作步驟；研究了基於emd的旋轉機械振動信號自適應濾波技術。
  8. The adaptive signal processing technology is a rising science embranchment, which composed with many subjects and fields. in this paper, application of the adaptive filter to elimination of the leaked triangular wave and the adaptive signal processing of the fmcw millimeter - wave radar system is studied thoroughly. the use of an adaptive filter offers an attractive solution to the problem as it usually provides a significant improvement in performance over the use of the conventional methods

    在系統的自適應信號處理研究中，系統實現採用稱為自調諧濾波器的自適應對消器，結果表明，在自適應過程結束后，利用該方案可以得到和原始攜帶信息的理想干弦波十分近似的正弦波輸出，其誤差是一個具有很小振幅的隨機過程，具有很好的濾波效果。
  9. 3. based on the characteristic of the sensor distribution inside a platform, a sensor registration model for single - platform alignment is given. with the taylor series, we can get the first - order approximation of the registration model

    根據平臺內傳感器空間布局特點給出平臺級傳感器的配準模型，並對配準模型進行一階近似，最後通過kalman濾波演算法求出系統偏差的估計。
  10. The course of extracting shape feature is : after medium filtering, edge detection and thresholding, the edge of image is obtained, then it is simplied as approximate polygon. a mutual template matching approach is proposed

    本文實現了形狀特徵提取模塊，具體實現的過程是：通過圖象的濾波、邊緣檢測、二值化處理得到圖象的邊界輪廓，最後將輪廓邊界簡化表示為近似多邊形。
  11. In the first part, this thesis emphasizes to introduce the approximation functions and inducement of three filters. also this thesis introduces the reason of choosing the cauer approximation

    著重介紹了三種濾波器的近似函數以及其推導過程，並介紹了為什麼要選擇橢圓近似。
  12. This situation makes the quality of recommendation systems decreases dramatically. to address this issue, we proposed a collaborative filtering recommendation algoritm based on item rating prediction. this method predicted ratings of un - rated item by the similarity of items, and then the nearest neighbors of target user were calculated with a new similarity measure method

    針對用戶評分數據的極端稀疏性，本文提出了基於項評分預測的irprec協同過濾推薦演算法，通過計算項之間的相似性，初步預測用戶對未評分項的評分，然後採用一種新穎的相似性度量方法計算用戶的最近鄰居。
  13. We study the design of haar wavelet for scale = a ( a2 ) and present a decomposition and reconstruction algorithm in chapter 3. secondly, in chapter 4 we study the design of orthonormal mutiwavelets of multiplicity r with scale = a ( a2 ). by the factorization theory, we give parametric expressions for orthonormal causal fir multifilter banks of r = 2 and scale = 4, and we found the length of scaling function can be controlled by the parameters. finally, we provide the error analysis between discrete multiwavelet transform coefficients and continue multiwavelet transform coefficients

    由於多小波變換系數的計算是直接與其預濾波方式相聯系的，而在單小波變換系數計算中之所以能由近似表示就是因為尺度函數具有低通特性和平移正交性，由此我們研究了能滿足以上要求的預濾波，並對離散小波變換系數和連續小波變換系數之間的差異作了分析，從誤差分析結果我們可以預見：為了減少誤差我們可以通過對預濾波的進一步設計來控制。
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