梯度點 的英文怎麼說

中文拼音 [diǎn]
梯度點 英文
gradient point
  • : Ⅰ名詞1 (梯子; 樓梯) ladder; stairs; steps; staircase 2 (姓氏) a surname Ⅱ形容詞(形狀像樓梯的...
  • : 度動詞[書面語] (推測; 估計) surmise; estimate
  • : Ⅰ名詞1 (液體的小滴) drop (of liquid) 2 (細小的痕跡) spot; dot; speck 3 (漢字的筆畫「、」)...
  1. To corner feature, both gradient magnitude change and direction change of gradient vector are discontinuity in a local image neighborhood, hence gradient - direction variation and gradient magnitude are used as another decision rule of the corner detection to improve antinoise

    為了提高抗噪聲,根據角特徵不僅灰變化是不連續的,且相對周圍其他方向也是不連續的,提出利用角變化和幅值作為角特徵檢測的另一個準則。
  2. By two ways, this paper debates the theory of fracture detection : on one hand by the way of edge detection in image processing ; on the other hand by time series analysis. the detection by time series analysis is more antinoise than edge detection in image processing. edge detection theory in image processing mainly includes correlation data, fuzzy edge detection, entropy operator edge detection and gradient edge detection

    圖像處理中的邊緣檢測的方法主要包括相干數據體法、模糊邊緣檢測法、基於熵運算元的邊緣檢測法、邊緣檢測法;其中模糊邊緣檢測法比較依賴于參數的選擇,其渡越兩邊的像素區別明顯;熵運算元的檢測方法則是檢測的圖像邊緣比較光滑,連通性好;檢測法可以使用不同的運算元核,演算法比較簡單;相干數據體對于總體的大的裂縫的分佈具有比較奸的反應。
  3. The point of singular signal ' s conjoint pixel always changes acutely in its gray - level value. the gray - level distributing gradient of conjoint pixels can show this change

    而信號的奇異或突變往往表現為相鄰像素處的灰值發生了劇烈的變化,我們可以通過相鄰像素灰分佈的來反映這種變化。
  4. The simulation results suggest that, at the end of the scanning line, the dissymmetric temperature field and the great temperature gradient result in the balling phenomenon and great thermal stress, which could lead to the destruction of the sintering samples in this region. because of the coupling effect between scanning lines, the balling phenomenon is increased as the increase of the scanning lines, thus the over short scanning lines should be avoided in the sintering process. different scanning strategies have significant influence on the sintering

    模擬結果表明,掃描端場的不對稱及較大的溫造成了端球化現象,並在端處產生較大的熱應力,使燒結成形試樣易在此處破壞;激光掃描線間的耦合作用使端球化現象隨掃描線的增加而逐漸顯著,燒結時應避免過短的掃描線;不同掃描策略對燒結成形有很大影響,交替掃描會影響燒結試樣的質量,實際製造時應採用單向掃描策略。
  5. The hybrid algorithm raises the convergence rate of the conjugate gradient method and solves the problem for which the convergence rate of the steepest descent method get slower when the isopleth of goal function is oblong

    這種混合優化演算法結合了共扼法和最速下降法產生搜索方向,既提高了共扼演算法的收斂速,又解決了目標函數的等值線是扁長橢球時,最速下降法下降緩慢的問題,具有收斂速快、收斂范圍大、適應面廣等特
  6. This article puts forward a solution named divide - assemble by deducing the size of bp neural network to overcome entering the local best point, the dividing process is that a big bp neural network is divided into several small bp neural networks, every small bp neural network can study alone, after all small bp neural networks finish their study, we can assemble all these small bp neural networks into the quondam big bp neural networks ; on the basis of divide - assemble solution, this article discusses the preprocessing of input species and how to deduce the size of bp neural network further to make it easy to overcome entering the local best point ; for the study of every small bp neural network, this article adopts a solution named gdr - ga algorithm, which includes two algorithms. gdr ? a algorithm makes the merits of the two algorithms makeup each other to increase searching speed. finally, this article discusses the processing of atm band - width distribution dynamically

    本文從bp網的結構出發,以減小bp神經網路的規模為手段來克服陷入局部極小,提出了bp神經網路的拆分組裝方法,即將一個大的bp網有機地拆分為幾個小的子bp網,每個子網的權值單獨訓練,訓練好以後,再將每個子網的單元和權值有機地組裝成原先的bp網,從理論和實驗上證明了該方法在解決局部極小值這一問題時是有效的;在拆分組裝方法基礎上,本文詳細闡述了輸入樣本的預處理過程,更進一步地減小了bp網路的規模,使子網的學習更加容易了;對于子網的學習,本文採用了最速? ?遺傳混合演算法(即gdr ? ? ga演算法) ,使gdr演算法和ga演算法的優互為補充,提高了收斂速;最後本文闡述了用以上方法進行atm帶寬動態分配的過程。
  7. When the moisture content is below fibre saturation point, the movement of absorbed water is subdivided into two parts : one is diffusion transfer due to the vapor pressure gradient, the other is moisture movement caused by the pressure fluctuation due to the variation of medium

    在纖維飽和以下時,木材內部吸著水的遷移可分為:水蒸汽壓力下的擴散遷移和由於乾燥介質壓力的波動而引起的浮動壓力下的遷移兩個部分。
  8. Energy losses leading to a decrease in head are also done away with, likewise losses in flow rate from the screening installations, both of which can have a detrimental effect on the efficiency of the facility. the constructional effort required for a hydrodynamic screw is small compared to that required for a turbine. if the compact version of a hydrodynamic screw hydrodynamic screw trough power take - off unit combined as a single unit is used, the constructional effort can be further reduced

    水力螺旋機技術的優有:無需監控系統,可自行調節水體供給和供給頻率運行效率高於水輪機和小型渦輪機效率平穩轉速低20rpm - 80rpm ,運行穩定防磨損無需定期清潔,易維護對河道湖泊里的魚蝦無損害基礎工事少,安裝簡便無堵塞,無需隔欄裝置能量利用充分等。
  9. Compared with the classical bp algorithm, robust adaptive bp algorithm possesses some advantages as following : ( 1 ) increasing the accuracy of the network training by means of using both the relative and absolute residual to adjust the weight values ; ( 2 ) improve the robustness and the network convergence rate through combining with the robust statistic technique by way of judging the values of the samples " relative residual to establish the energy function so that can suppress the effect on network training because of the samples with high noise disturbances ; ( 3 ) prevent entrapping into the local minima area and obtain the global optimal result owing to setting the learning rate to be the function of the errors and the error gradients when network is trained. the learning rate of the weights update change with the error values of the network adaptively so that can easily get rid of the disadvantage of the classical bp algorithm that is liable to entrap into the local minima areas

    與基本bp演算法相比,本文提出的魯棒自適應bp演算法具有以下優: ( 1 )與魯棒統計技術相結合,通過訓練樣本相對偏差的大小,確定不同訓練樣本對能量函數的貢獻,來抑制含高噪聲干擾樣本對網路訓練的不良影響,從而增強訓練的魯棒性,提高網路訓練的收斂速; ( 2 )採用相對偏差和絕對偏差兩種偏差形式對權值進行調整,提高了網路的訓練精; ( 3 )在採用下降演算法對權值進行調整的基礎上,通過將學習速率設為訓練誤差及誤差的特殊函數,使學習速率依賴于網路訓練時誤差瞬時的變化而自適應的改變,從而可以克服基本bp演算法容易陷入局部極小區域的弊端,使訓練過程能夠很快的「跳出」局部極小區域而達到全局最優。
  10. In this paper, the contrast of original image is enhanced by nonlinear transformation based on the characteristics of grain image ; after comparing several methods of threshold segmentation and analyzing their performance and applicability on grain image, the adaptive threshold segmentation based on gradient image is presented ; the noise of binary image is reduced with morphological filter, the hollow in binary image is filled in and a recognition algorithm is designed to remove agglomerate particle ; on the basis of mathematical morphology two methods are adopted to segment agglomerate grains that are not agglomerated tightly ; the parameters of size and shape, perimeter, area, diameter, complexlity, longest feret diameter, shortest feret diameter etc, are extracted. this technique is applied in measurement of pearl powder ' s particle size

    本文根據粒圖像的特,採用非線性對比增強處理改善顆粒顯微圖像的對比;對多種閾值分割方法進行比較,分析了它們的性能和用於粒圖像的適用性,在此基礎上提出了一種基於圖像的動態閾值分割方法;對獲取的顆粒二值圖像進行形態濾波和空洞填充,設計了識別演算法去除凝聚體;對重疊不太嚴重的粘結顆粒採用了兩種基於數學形態學的分割演算法;提取了周長、面積、粒徑、復雜、最長feret徑、最短feret徑等大小和形狀特徵參數,對珍珠粉等粉體粒進行了測量。
  11. The following contents were mainly studied : ( 1 ) aspect, structure as well as characteristic of species composition between fragmental evergreen broadleaved forests and continuous evergreen broadleaved forest ; ( 2 ) species diversity, species abundance and species evenness between fragmental evergreen broadleaved forests and contin. us evergreen broadleaved forest ; ( 3 ) plant floristic compositions at family and genus levels between fragmental evergreen broadleaved forests and continuous evergreen broadleaved forest ; ( 4 ) life form between fragmental evergreen broadleaved forests and continuous evergreen broadleaved forest ; ( 5 ) microclimate factor ( sun radiation, temperature, wind velocity, humidity ) in different level pattern ( open, edge and interior ) between fragmental evergreen broadleaved forests and continuous evergreen broadleaved forest ; ( 6 ) the relations between environment and soil factors as well as species diversity of forest community between fragmental evergreen broadleaved forests and continuous evergreen broadleaved forest

    主要研究以下內容: ( 1 )片斷和連續常綠闊葉林的外貌、結構和物種組成特徵; ( 2 )片斷和連續常綠闊葉林的物種多樣性、豐富和均勻性; ( 3 )片斷和連續常綠闊葉林的科( ? )屬水平的植物區系成分; ( 4 )片斷和連續常綠闊葉林生活型組成; ( 5 )在不同的水平格局上(林外、林緣和林內) ,片斷和連續常綠闊葉林的小氣候要素(光照、溫、風速、濕等) ; ( 6 )片斷和連續常綠闊葉林的環境和土壤因子,與群落的物種多樣性之間的關系。實驗結果表明: ( 1 )各片斷森林的外貌特基本上和連續森林一致。
  12. Among hese method, one of the simplest is the deepest gradient descent algorithm, but it has one disadvantage that the solutions are oscillatory and slowly convergent. a friction term is ntroduced to avoid oscillatory solutions and raise convergence rate. the third major contribution of this dissertation is study on 3 - d diffuse object surface optical automatic measurement

    其次,結合要處理的具體問題,介紹數值優化及幾種常用的無約束最優化計算方法,以最優法為基礎,討論其演算法的優缺,通過引進阻尼系數,改進了演算法的收斂速,從而提高迭代精
  13. Anfis based on takagi and sugeno ' s fuzzy model has the advantage of being linear - in - parameter ; thus the conventional adaptive methods can be efficiently utilized to estimate its parameters

    由於節參數是線性的,用下降和最小二乘的混合學習演算法來調節參數,減少了運算量,加快了收斂速
  14. In the algorithm level, currently various training algorithms of neural networks, including gradient algorithms, intelligent learning algorithms and hybrid algorithms, are comparatively studied ; the optimization principle of bp algorithm for neural networks training is analyzed in detail, and the reasons for serious disadvantages of bp algorithms are found out, moreover, the optimization principle of two kinds of improved bp algorithms is described in a uniform theoretic framework ; and the global optimization algorithms of neural networks, mainly genetic algorithm are expounded in detail, it follows that a improved genetic algorithm is proposed ; finally the training performances of various algorithms are compared based on a simulation experiment on a benchmark problem of neural network learning, furthermore, a viewpoint that genetic algorithm is subject to " curse of dimension " is proposed

    在演算法層,本文對目前用於神經網路訓練的各種演算法,包括演算法、智能學習演算法和混合學習演算法進行了比較研究;對用於神經網路訓練的bp演算法的優化原理進行了詳細的理論分析,找到了bp演算法存在嚴重缺陷的原因,並對其兩類改進演算法-啟發式演算法和二次演算法的優化原理,在統一的框架之下進行了詳盡的理論描述;對神經網路全局優化演算法主要是遺傳演算法進行了詳細的闡述,並在此基礎上,設計了一種性能改進的遺傳演算法;最後基於神經網路學習的benchmark問題對各種演算法在網路訓練中的應用性能進行了模擬研究,並提出了遺傳演算法受困於「維數災難」的觀
  15. Recently, a great progress has been made in aerodynamic optimization design technologies based on computational fluid dynamics. the control theory approach advocated by antony jameson is the typical methodology among them. its major advantage is that the computation of the sensitivity derivatives of cost function with respect to design variables is nearly independent of the number of design variables, which greatly saves the computational cost

    近年來,計算流體力學( cfd )設計技術得到較大發展,其中最有代表性方法是jameson發展的基於控制理論(伴隨方法)的氣動優化設計技術,其顯著優是目標函數對設計變量的計算幾乎與設計變量數目無關,從而大量節省了計算費用,並成為當前cfd領域的研究熱
  16. A page gel, stained by the petiodic acid - schiff ' s method to reveal glycoproteins, further displayed that the bindng - protein was a glycoprotein belonging to lectin, which contained 17. 4 % ( w / w ) neutral carbohydrate content of the glycoprotein detected by the phenol / h2so4 method. peptide mapping was comparable to the reported protein in protein bank. the database homology search ( ncbi blast ) indicated that the binding - protein shared 70 - 80 % homogeneity to l - aspartate oxidase, aspartyl / glutamyl - trna ( asn / gln ) amidotransferase subunit b, glutamyl - trna reductase, histidyl - trna synthetase

    連續聚丙烯耽胺凝膠電泳、 sds一聚丙烯酞胺凝膠電泳和等電聚焦的結果表明該蛋白分子量為1 「 . skda ,由二個相同的亞基組成,亞基分子量為」 . ikda ,等電為8 . 25 .糖蛋白染色結合考馬斯亮藍染色的結果證實此結合蛋白是個糖蛋白,其中糖含量為17 . 44 % ,蛋白含量為82 . 56 % .凝集反應確定該糖蛋白也是一個凝集素
  17. Also, the author ’ s design strategy and creativity has been given in this paper. specifically, it includes : based on the feasibility analysis of the fit selection of control parameters in the aeration process, the aeration process of wastewater treatment of the joint - constructional complete - mixed activated sludge process has been aimed at in this paper. then, the state equations of the aeration process have been proposed in this paper, which is on the base of dissolved oxygen concentration ( do ) and discharge quantity of sludge ( qw ) as control variables, the concentration of bod and sludge as state variables. based on the present study on optimization control of wastewater treatment, the multivariable optimal control model with restriction factor has been presented in the paper with introducing modern control theory and system analysis into the field of activated sludge wastewater treatment,

    具體包括:以完全混合、表面曝氣合建式活性污泥工藝的污水處理曝氣過程為研究對象,在闡述了曝氣過程式控制制參數選取可行性的基礎上,建立了以溶解氧濃do和活性污泥排放量qw為控制變量,以曝氣池中有機物濃s和微生物濃x為狀態變量的活性污泥曝氣過程的基本狀態方程;運用現代控制理論的觀和污水處理理論,在現有關于污水處理最優控制問題研究的基礎上,建立了有約束條件多變量能耗最小數學模型,該數學模型是以有機物排放總量和狀態變量的末值條件作為約束條件,曝氣過程的能耗最小作為目標泛函;採用增廣拉格朗日乘子法對最優控制問題進行轉化,並對應用極大值原理求解能耗最小這一最優控制問題進行了詳細的解析;引入約束運算元,應用具有控制約束的共軛演算法對能耗最小這一最優控制問題進行求解,並進行模擬實驗驗證。
  18. There are many advantages to heat by air condition system, but there are also many problems. the air distribution of air condition room is often designed according to the summer outdoor parameters. thus, in winter, the hot air will arise with the influence of buoyancy, which result in the decline of vertical temperature gradient and produce a successive of problems

    空調送風供暖有著很多的優,但也出現了很多問題,由於空調房間的氣流組織一般是以夏季工況為設計工況,在冬季由於送風熱氣流在浮升力作用下上升,引起垂直溫的增加,並產生一系列的問題,致使空調房間冬季室內熱舒適性較差、能源利用效率較低。
  19. Combining the characteristic of the fabrication of fgm by particle co - sedimentation, the densification of fgm has been designed from three aspects : the densification mechanism, the correlative parameters of the additives and the sintering schedule. subsequently, the densification of the w - mo - ti system composites has been investigated

    結合共沉降法制備功能材料的特,從緻密化的機理選擇,燒結劑種類、含量和粒的確定,燒結機制的確定等三個方面對其緻密化思路進行了設計,並對論文選用的w - mo - ti體系的復合材料的緻密化進行了初步研究。
  20. Fluent can imitate relation curve about heat transfer coefficient k and re, friction resistance coefficient f and re, the isoline about dot metrix between velocity field and temperature grads field. it also drafts several operating mode simulated stream field, velocity and temperature grads field

    應用fluent軟體擬合出傳熱系數與re關系曲線、摩擦阻力系數與re關系曲線、速與溫梯度點積值的等值線圖, nu較大的幾個工況的模擬流場、速和溫場。
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