閾前 的英文怎麼說

中文拼音 [yùqián]
閾前 英文
prethreshold
  • 閾 : 名詞1. [書面語] （門坎兒） threshold; doorsill2. （界限; 范圍） threshold
  • 前 : Ⅰ名詞1 （在正面的） front 2 （次序在先的） first; top 3 （過去的; 較早的） ago; before; preceding...
  1. After scanning the object image and labeling the connected component, the background and foreground noise could be removed easily by threshold value area expunction

    該方法僅需對圖像作一次全掃描即可標記物體所有連通部分，統計標識號，根據閾值面積消除法即可快速去除圖像中所有前景和背景噪聲。
  2. In this dissertation we make a study of subliminal channels that conclude the progress, the application, the model, the construction, the stego - key, the capacity, the security, the way to realize subliminal - freeness, and so on

    本文對閾下通道技術進行了比較全面的總結和研究，包括閾下通道的發展狀況，應用前景，閾下通道的模型，構造方法，隱匿密鑰，容量，安全性以及封閉方法等。
  3. Output can be obtain, next we use our designed the wavelet soft threshold to select result of the wavelet transform, finally, we give the selected result reversal wavelet transform. it is obvious : the wavelet soft threshold is important to improve the quality of the gray image processing. i give the donoho wavelet soft threshold a modified value method, which has a relation with ratio of signal - noise. i made full use of discrete hop field single feedback neural network, and nonlinear steady of automatic system at last, i obtained a steady limited ring, give the energy function an order differential a optimal

    我的思路是：改造現有圖形結構，先建立能反映信噪比大小且含待定參數k的表達式，然後通過離散型h0pfi舊單層反饋神經網路，再結合前邊的混合濾波器構成一個非線性控制系統，寫出對應的網路函數，利用相平面法和李雅普諾大穩定性的判據，得到一個穩定的極限環，從而確定出參數卜的范圍，進而再對原來的小波軟閾值進行修正，用修正後的值作為小波閾值。
  4. Abstract : a new method for determining proximity parameters, and in electron - beam lithography is introduced on the assumption that the point exposure spread function is composed of two gaussians. a single line is used as test pattern to determine proximity effect parameters and the normalization approach is adopted in experimental data transaction in order to eliminate the need of measuring exposure clearing dose of the resist. furthermore, the parameters acquired by this method are successfully used for proximity effect correction in electron - beam lithography on the same experimental conditions

    文摘:在電子散射能量沉積為雙高斯分佈的前提下，提出了一種提取電子束光刻中電子散射參數，和的新方法.該方法使用單線條作為測試圖形.為了避免測定光刻膠的顯影閾值，在實驗數據處理中使用歸一化方法.此外，用此方法提取的電子散射參數被成功地用於相同實驗條件下的電子束臨近效應校正
  5. This paper summarized several main research methods on this topic in our country, including " the determinant of laser - induced - damage of thin film by the scan of transmission and reflectance method ", " study of the phenomena on laser - induced thin film damage by photo - acoustic method " and " the measurement of damage threshold on optical thin film by diffusion method ", etc

    本文總結了目前國內幾種主要的研究方法，包括用透射反射掃描法檢測光學薄膜的激光損傷，用光聲法測定光學薄膜的破壞閾值，以及用散射法來測量光學薄膜的損傷閾值等。
  6. The previous studies suggested that the auditory threshold of fmmu albino guinea pigs was lower significantly than that of pigment ones, the anoxia tolerance of fmmu albino guinea pigs was better than that of pigment ones, their immunological function was weaker than that of pigment ones

    目的： fmmu白化豚鼠是從普通花色豚鼠突變種中選育而成的新品系封閉群實驗動物。前人研究結果表明fmmu白化豚鼠的聽覺閾值明顯低於花色豚鼠，缺氧耐受性優于花色豚鼠，免疫功能低於花色豚鼠。
  7. Corticofugal modulation of frequency tuning of inferior collicular neurons in big brown bat, eptesicus fuse us chinese science bulletin, 2000 in order to explore the possible mechanism of corticofugal modulation of excitatory frequency tuning curves ( eftcs ) of midbrain neurons, we examine the change of sharpness, frequency - intensity response area, minimum threshold of both eftcs and inhibitory frequency tuning curves ( iftcs ) of inferior coliicular neurons during corticofugal modulation using two - tone inhibition paradigm and micro - electrical stimulation technique

    第二章大棕幅聽皮層對中腦下丘聽神經元頻率調諧曲線的調制科學通報， 2000用雙聲刺激的方法和電刺激技術，進一步研究了在激活聽皮層前後下丘聽神經元興奮性和抑制性頻率調諧曲線的銳度、頻率強度反應區域、最低閾值的協同變化
  8. This thesis explains the necessity of the character recognition technology of the computer at first, describe the meaning in which the handwritten numeral discerns ; pretreatment technology of handwritten numeral recognition, including two value, line segmentation, word segmentation smooth, removing noising, standardization and thinning are discussed two value concretely discusses whole threshold value, some threshold value, dynamic threshold value and utilize space information to carry on threshold, which are several kinds of common method of choosing threshold value, especially utilize space information to carry on threshold value is describe in detail ; adopting to the foundation of thinning based on mathematics morphology, thinning algorithm of serials same and thinning algorithm of protecting shape are discussed ; afterwards, according to principle ' s diagram of the on - line character recognition, by analyzing the structure feature of the handwritten numeral, this thesis has proposed the online recognition te chnology of the free handwritten numeral based on the stroke feature and the online recognition technology of the free handwritten numeral based on the multistage classifying device. detail narrated noise removing, stroke characteristic definition and discernment, distance criterion of whole word match ; then under the foundation of handwritten numeral segmentation, off - line handwritten numeral recognition is researched. especially minimum distance classifying device, tree classifying device and adaptive resonance ( art ) network classifying device is discussed at the same time, believes degree analyses are introduced to integrate a lot of classifying devices ; at the end, the typical application of the handwritten numeral recognition was briefly narrated, its application in extensive data statistics, financial affairs, tax, finance and mail sorting have been explored

    二值化時對整體閾值二值化、局部閾值二值化、動態閾值二值化和利用空間信息進行閾值選取幾種常用的閾值選取方法進行討論，特別對利用空間信息進行閾值選取進行了詳細論述；在對通過對基於數學形態學的細化的基礎上，討論序貫同倫形態細化演算法和保形的快速形態細化演算法；然後依據聯機字元識別原理框圖，分析了手寫數字的結構特點，提出了基於筆劃特徵的任意手寫數字在線識別技術和基於多級分類器任意手寫數字在線識別技術，對其中涉及的筆劃識別前的噪聲處理、筆劃間特徵量的定義及識別、整字匹配的距離準則進行了詳細敘述；繼而在對手寫數字的分割的基礎下對脫機手寫數字識別進行了研究，對基於最小距離分類器字元識別、基於樹分類器的字元識別、基於自適應共振（ art ）網路的字元識別分別進行了詳細討論，並引入置信度分析將多個分類器進行了混合集成；最後簡單闡述了手寫數字識別的典型應用，對其在大規模數據統計、財務、稅務、金融及郵件分揀中的應用進行了探索。
  9. Before the bp neural net forecast fire size class, it needs a process of studying from sample data. the neural net adjusts the weight value and threshold value according to the sample so as to give the linking weight value and threshold to low the difference between output from itself and the expected value

    Bp網路在應用於預測預報之前，需要一個網路學習過程，網路根據輸入的訓練（學習）樣本進行自適應、自組織，確定各神經元的連接權w和閾值。
  10. In order to study the effect of weak noise on the sound signal extraction of mouse ( mus musculus km ) inferior collicular ( ic ) neurons from environment, we examined the change in frequency tuning of neuron induced by a weak noise relative to 5 db below minimum threshold ( remt - 5 db ) of tone. 12 healthy adult mice ( 20 - 25 g, b. wt. )

    本實驗旨在探討弱噪聲對小鼠（ musmusculuskm ）中腦下丘（ inferiorcolliculusic ）神經元聲信號提取的影響及其神經機制，我們選用相當于純音閾下5db的白噪聲（ whitenoise ） ，比較加入噪聲前後神經元頻率調諧曲線的變化和注射-氨基丁酸（ - aminobutyricacid ， gaba ）能受體拮抗劑荷包牡丹堿（ bicuculline ， bic ）后對該變化的影響。
  11. In this paper, micro - cavity semiconductor laser ( mcsl ) with pillar vertical - cavity surface - emitting structure ( vcsel ) which has potential applications in optical communication and optical interconnect is theoretically analyzed, the calculation model that used to discuss the modal performance of rectangular columnar and cylinder vcsel with oxidized aperture is established by using vector field model. the numerical simulations in the case of cylinder structure show oscillating wavelength and threshold gain against inside and outside radius of laser, the layer refractive index and pair number of bragg mirror, thickness, position and oxidized material ' s refractive index of oxidized aperture, in detail. more practically, considering dos shell of laser as non - perfect one, or supposing that dos shell is separated from the laser, we can obtain more significative results

    本工作以矢量場模型出發，對具有誘人應用前景的柱形垂直腔面發射結構（ vcsel ）的微腔半導體激光器（ mcsl ）進行了理論分析，建立了用於分析方柱形和圓柱形結構具有氧化孔徑層的激光器的模式特性的理論模型；對圓柱形結構情況進行了數值模擬，得到了振蕩波長、閾值增益隨激光器內外半徑、 bragg反射鏡層折射率、周期數以及氧化孔徑層厚度、位置和氧化物折射率的詳細變化規律；為使理論計算更接近實際，將外加金屬包殼視為非理想導體，或將金屬包殼與激光器結構隔開，分別對這兩種情況下的結果進行了討論。
  12. Effect of spatial separation in azimuth on the threshold of forward masking in time domain

    聲源空間分離對向前時域掩蔽閾值的影響
  13. For the first problem, we overcome the limitation of binary code algorithm based on threshold value, which is popular used now, we presented the binary code algorithm based on the statistical information of neighbour region

    對于輸入編碼問題，針對目前常用的基於閾值的二值法的局限性，我們提出了基於鄰域統計信息的峰值檢測演算法。
  14. At the present time, the first choice driver of icf is the laser. the basic requirements to the kdp crystal optics of icf solid laser driver are : high accuracy face shape quality ( transmission wave front / 6 pv ), high laser damage threshold value ( 15j / cm2 ), good surface roughness ( 5nm )

    慣性約束聚變固體激光驅動器對kdp晶體光學零件的基本要求是:高精度的面形質量（透射波前/ 6pv ） 、高激光損傷閾值（ 15j / cm2 ） 、良好的表面粗糙度rms （ 5nm ） 。
  15. And the controller based on vhdl ( very high speed integration circuit hardware description language ) was designed under the fpga ( field programmable gates array ) integration environment with the values gained from the train of the neural network using matlab

    氣動柔性手指神經網路控制器是在已經對氣動柔性手指進行運動學和動力學分析的前提下，使用matlab對神經網路進行試訓，依據訓練所得的權值和閾值，在現場可編程門陣列集成環境下，基於超高速集成電路硬體描述語言完成的。
  16. However, most of the current wireless networks still work in low bandwidths, and mobile devices still suffer from weak computational power, short battery lifetime and limited display capability. therefore, this thesis deals with developing a very low bit - rate bi - level video coding technique, which can be used in video communications almost anywhere, anytime on any device as follows : ( 1 ) convert true color video sequences from ccd and video card to grayscale ones, ( 2 ) detect static region of successive frames by the sum of absolute differences ( sad ) and update current frame using static region of previous frame, to decrease flicker. ( 3 ) threshold the images to bi - level video sequences using ridler ' s iterative selection

    為此，本論文在傳統h . 26x和mpeg - x等視頻編解碼技術的基礎上提出了一種新的基於輪廓的視頻編解碼方案，步驟如下： （ 1 ）先把從ccd攝像頭捕捉到的視頻幀序列轉換成灰度幀序列， （ 2 ）在灰度幀序列的基礎上通過sad演算法找出相鄰幀的靜態區域，用前一幀的靜態區域更新當前幀的相應區域，這樣可以降低畫面閃爍， （ 3 ）然後用灰度直方圖迭代所產生的閾值二值化圖像，生成基於輪廓的視頻幀序列， （ 4 ）最後運用基於上下文的算術編碼技術對由第三步生成的二值化視頻幀序列進行算術編碼。
  17. During the process of compressing, the choice of the threshold value is involved. in the former method, the threshold value is fixed, but in our method, threshold value is adaptive. furthermore, we can eliminate noise by wavelet

    在對心電信號得壓縮過程中，必然會涉及到閾值的選擇，以前的一些數據壓縮方法中的閾值選擇是基本不變的，在我們這個壓縮方法中閾值的選擇是自適應的。
  18. Prediction efficacies for increase of seismicity with m 5 ~ 6 before an earthquake with m 7 and increase of seismicity with m 4 ~ 5 before and earthquake with m = 5 ~ 6 were also statistically examined and were passed, respectively

    文中分別對7級強震前5級、 6級地震活動增強，和6級地震前4級、 5級地震活動增強，選擇了時空閾值和預報規則，進行了預報評分檢驗，得到了肯定的結論。
  19. Physics device model, component structure design and fabrication technology are discussed based on the thorough analysis of strained silicon and soi physics mechanism. the detail contents are as follows. the analytical threshold voltage model, drain current model and transconductance model are derived from poisson ’ s equation for the fully depleted strained soi mosfet

    本論文圍繞這一微電子領域發展的前沿課題，在深入分析應變硅和soi物理機理的基礎上，對器件的物理模型、器件結構設計和工藝實驗等問題作了研究，主要包括以下幾部分:首先，從器件的物理機制出發，建立主要針對薄膜全耗盡型器件的閾值電壓、輸出電流和跨導模型。
  20. And reliability threshold value of the precision, importance of the precision and the maintenance coefficient are added to the production expression

    並且在產生式規則表示中增加了規則前提的可信度閾值、規則前提的重要度以及規則所涉部件的可維性系數。
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