次梯度 的英文怎麼說

中文拼音 [cìtīdù]
次梯度 英文
subgradient
  • 次 : Ⅰ名詞1 （次序; 等第） order; sequence 2 [書面語] （出外遠行時停留的處所） stopping place on a jou...
  • 梯 : 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 : 度動詞[書面語] （推測; 估計） surmise; estimate
  1. Secondly, the new generalized gradient is introduced to take advantage of the given directional derivative

    其次討論了一類新的廣義梯度，這樣的廣義梯度能夠充分利用已經有的方向導數的信息。
  2. In the first trial, combination of enzymatic digestion was used to prepare suspensions of spermatogenic cells from adult mouse testis, and then a modified discontinuous percoll gradient centrifugation method ( 15 %, 22 %, 30 %, 40 %, 50 %, 60 % ) was introduced to isolate spermatids from the cellular suspensions. the content of spermatids in each isolated fraction by percoll method was determined by morphology ( wright - giemsa stain ) and flow cytometry analysis, and the viability of spermatogenic cells was assessed by using eosin y exclusion test

    在第一部分試驗中，首先利用連續3次組合酶消化成年小鼠睪丸制備睪丸細胞懸液，然後經6層非連續percoll梯度離心法（ 15 、 22 、 30 、 40 、 50和60 ）分離，通過形態學和流式細胞術鑒定南京醫科大學碩士學位論文各個percoll組分中精子細胞的含量，並以伊紅y排斥試驗測定細胞的存活率。
  3. Maximum - norm superapproximation of the gradient for the tensor - product quadratic rectangular parallelepiped finite element

    張量積二次長方體有限元梯度最大模的超逼近
  4. The observed clinal variation in the frequency of serotinous cones may be described as a fairly regular decrease in all directions.

    所觀察到的晚熟球果的頻率梯度變異可描述如下：向四周相當有規律地漸次減少。
  5. The diagnostic analysis for the sandstorm process on the base of height, temperature, pressure and wind etc output from the model shows that the upper cold trough, low - level wind shear, surface cold anticyclonic ridge, mesoscale cyclone and cold front are the main synoptic systems, surface cold anticyclonic ridge and cold front provide condition of wind force to occurrence of the sandstorm weather, the strong mesoscale cyclone before front makes pressure gradient before and after cold front obviously strengthen, moreover, and it increases obviously the temperature of the controlled area, as a result, the updraft movement caused by convergence before front strengthens

    500hpa強鋒區、 700hpa切變和鋒前中尺度系統的強弱及位置變化是沙塵暴天氣發生發展到減弱的直接原因。地面冷高壓、地面氣旋及冷鋒是造成本次沙塵暴天氣的主要地面天氣系統。地面冷高壓及冷鋒為沙塵暴天氣的發生提供了風力條件，而中尺度氣旋使冷鋒前後氣壓梯度明顯增強外，又使所控制的區域增溫明顯，使鋒前輻合上升運動加強，為沙塵暴天氣的發生提供了熱、動力條件。
  6. By performing fourier transformation, the relationship between the turbulent intensity of the particle and that of the carrier fluid was obtained which makes clear that particle size, specific gravity, velocity gradient, and the characteristic frequency of energy - containing eddies are four basic influencing parameters. it is proven theoretically that under certain conditions, the stream - wise and transverse particle turbulent intensities exceed those of the carrier fluid. based on the equations of two - phase flow, the presence of fine sediment suspension is shown to attenuate the turbulent intensity of the water

    通過對細小顆粒在剪切流場中運動方程的fourier分析，得到了顆粒脈動強度和流體脈動強度之間的定量關系，表明顆粒粒徑、顆粒密度、流速梯度以及紊動場含能旋渦的特徵頻率是影響顆粒脈動強度的主要因素，首次從理論上證明了在一定條件下，顆粒在縱、垂向的脈動強度均會超過相應的流體脈動強度，為已有的實測資料提供了合理的解釋。
  7. So, we propose another novel algorithm using the cubic spline interpolation along the relevant direction and computing weights by trigonometric function of the gradients. the algorithm also adopts the correlation between color channels. and it proved highly effective based on some tests

    鑒於此，本文接著提出了一種基於三次樣條函數在相關方向進行插值以及利用梯度的三角函數關系來計算相關性加權系數的混合型插值方案，並結合了考慮不同顏色通道間的相關耦合關系。
  8. 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，以最優梯度法為基礎，討論其演算法的優缺點，通過引進阻尼系數，改進了演算法的收斂速度，從而提高迭代精度。
  9. The fall of global sea level during the last glacial maximum enhanced the fluvial gradient and river cutting, resulting in the formation of the large - scale qiantangjiang river and taihu incised valleys which were subsequently filled and rapidly buried in the post - glacial period, with the paleointerfluve being exposed to air on both flanks of the incised valleys

    末次冰盛期，海平面下降的幅度大，增加了河流梯度、加強了下切作用，形成了錢塘江和太湖下切河谷，隨后在冰後期被充填和埋藏，下切河谷的兩側為暴露地表的古河間地。
  10. Then, a new regularized conjugate - gradient reconstruction algorithm was proposed for optical tomograpy, in which the ill - posedness of the reconstruction problem and as a result the quality of the reconstructed image are improved by introducing two regularization terms of image entropy and the local smoothing function

    其次，提出了一種正則化共軛梯度ot圖像重建演算法，通過引入圖像熵和局部平滑函數作為正則化項有效改善了重建問題中的病態特性，提高重建圖像的質量。最後，提出一種多解析度的ot圖像重建演算法。
  11. 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，包括梯度演算法、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梯度演算法的優化原理，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」的觀點。
  12. The active transport of na + and solute molecules depends on the proton electrochemical gradients established by proton pumps

    Na ~ +和可溶性物質的次級轉運依賴于由質子泵建立的質子電化學梯度。
  13. In this thesis, some key issues of the vr technique are systematically investigated. firstly, for the image filters and image interpolation between slices, a integrated interpolation algorithm is presented based on the contour shape and correspondence matching, which keeps the shapes and grays information the objects of interest. secondly, the fidelity of effect of the vr for medical images is studied, and a continuous - gradient - based method for transparent volume rendering is proposed, which vivifies the results of volume rendering

    首先，研究了醫學斷層圖像數據的濾波及層間插值技術，提出了一種基於輪廓形變和對應點匹配相結合的混合插值演算法，在實現圖像層間插值的同時保持了目標的輪廓形狀與灰度信息；其次，對醫學影像容積重建效果的逼真度進行了研究，提出了一種基於連續梯度轉換函數的互動式透明體繪制方法，使重建效果更加生動、真實。
  14. The research include : 1 ) measuring co2 concentration in the soil air and vegetation air by using co2 measuring instruments ; 2 ) measuring the releasing rate of co2 coming from soil surface by using alkaline absorbing method ; 3 ) measuring the hydrochemical indexes of soil water. the research results are as follows : ( 1 ) the author has made field observation of depth distribution of soil air co2 in the mt. jinfo karst experiment site. the results show that two concentration gradient, soil to atmosphere and soil to carbonate rock, are form

    本次實驗以典型的亞熱帶巖溶分佈區?金佛山自然保護區為例，選擇了巖溶窪地內的高山草甸和靠窪地邊緣地帶的方竹林、裸地以及石林內的喬木林4個樣地，對土壤co _ 2濃度空間分佈規律以及晝夜動態和日動態變化狀況進行了觀測，獲得了如下新的認識： （ 1 ）土壤中co _ 2濃度分佈的觀測結果表明，土壤中具有土壤-大氣、土壤-碳酸鹽巖兩個方向的co _ 2濃度梯度。
  15. Through the thermodynamic analysis for the sandstorm weather according to the simulated potential temperature, potential vorticity field, it is found that this sandstorm weather occurred in the condition of the atmospheric stratification stability, the area of the high potential temperature value and the potential temperature gradient have a good corresponding relationship with the surface cold air and cold front, so are the strength of potential vorticity and the different developing stage of sandstorm

    利用輸出的位溫、位勢渦度場，對沙塵暴天氣進行熱動力條件分析，發現本次沙塵暴天氣發生在大氣層結穩定狀態下，位溫大值區及位溫梯度與地面暖低壓的強弱和移動有著很好的對應關系，位渦的水平分佈特徵和強弱變化對沙塵暴的出現時間和落區有一定的指示意義。
  16. According to the train of thought of strengthening the center, radiating around an axis, carrying the work forward gradiently, then driving the whole province forward, we can make an overall distribution, and create a metropolitan area with the core of nanchang, with an axis of developing the towns along the line of jing - jiu and zhe - gan railways and with a secondary axis of developing the towns along the line of no. 105, no. 206 and no. 323 national road

    按照「強化中心、軸線輻射，梯度推進、帶動全省」的思路進行總體布局，使之基本形成以南昌為核心的大都市區，京九鐵路和浙贛鐵路沿線的城鎮發展為主軸帶，及沿105 、 206 、 323國道城鎮發展為次軸帶的發展態勢。
  17. The paper studied three aspects of extracelluar enzymes in sediments of the tidal flat wetland, namely 1 ) the distibution of five sorts of extracellular enzymes in sediments in the east end of chongming island along the elevation gradient or community succession series, the relationships between the activities of enzymes and the ecological factors, and functions of extracellular enzymes in the process of community succession ; 2 ) the effects of the heavy metal ions and edta on the activity of alkaline phosphatase in sediments of the east end of chongming island by adding and removing of heavy metal ions, discussing whether the activities of extracellular enzymes could be taken as the indicators for the environmental status ; 3 ) the variations of the activities of extracellular enzymes in sediments in the east end of hengsha island after the discarding clay

    本文以長江口典型濕地?崇明東灘為例，首次研究了沿高程梯度或沿植被演替系列沉積物中堿性磷酸酶等五種胞外酶活性的空間分佈規律，分析了胞外酶活性與環境因子的相互關系及其產生機制，討論了胞外酶活性在濕地植被演替中的作用。同時以崇明東灘沉積物為對象，運用重金屬離子的添加和去除等方法，研究了重金屬離子對沉積物中堿性磷酸酶活性的影響，利用胞外酶活性的變化探討了崇明東灘重金屬污染的狀況。此外，本文還研究了橫沙東灘吹泥試驗工程對沉積物環境因子和胞外酶活性的影響並進行了對比分析。
  18. Pcr analysis indicated that all lines had been integrated of ssmapkk. northern analysis revealed the presence of expression of ssmapkk mrna in transgenic lines. in principle, ssvp overexpression can increase proton electrochemical gradients across the vacuolar membranes, which permit the secondary active transport of na + and solute molecules

    理論上， ssop的過量表達可增加轉基因植株細胞跨液泡膜的質子電化學梯度，為次級轉運提供驅動力，從而增加可溶性物質和na十向液泡內的轉運，提高轉基因植株的抗旱和抗鹽性。
  19. Mesoscale low vortex ' s " wandering " at eastern anhui province and stronger development at the stiff moist isentropic surfaces are very important to this heavy rainfall process

    中尺度低渦在安徽東部移動過程中的「打轉」和在等熵面上沿梯度密集等壓線的運動和強烈發展，對這次強降水過程具有重要作用。
  20. 2 both least mean - square ( lms ) and least - square ( ls ) blind space - time receivers methods based on the rosen ' s gradient projection are presented for space - time receiver that merge with the idea of smart antenna, and combined with the different data - selected schemes. the effect of these schemes on the computational complexity of two detection methods is analyzed. the simulations illustrate that those methods are effective

    2 、針對將智能天線的思想融入其中的空時接收機，提出了基於rosen梯度投影實現的最小均方（ lms ）與最小二乘盲空時接收機演算法並將提出的不同數據方案結合起來，分析了提出的方案對每次迭代運算的運算量的影響，通過模擬實驗驗證了方法的有效性。
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