離中量數 的英文怎麼說

中文拼音 [lízhōngliángshǔ]
離中量數 英文
measures of variability
  • 離 : Ⅰ動詞1 （離開） leave; part from; be away from; separate 2 （背離） go against 3 （缺少） dispens...
  • 量 : 量動1. （度量） measure 2. （估量） estimate; size up
  • 數 : 數副詞（屢次） frequently; repeatedly
  1. Standard deviation in statistics, a measure of the dispersion of a frequency distribution : it is the average magnitude of deviations from the center of normal curve, calculated by squaring all the deviations, calculating their mean, then finding the square root of the mean

    標準偏差：統計中，一種衡量數據組分佈的分散或變化情況的數據，是偏離正態分佈中間位置數據大小的平均值。
  2. The governing equations of the problem are derived in hamiltonian form by using variable substitution and variational principle. then the methods of separation of variables and conjugate symplectic eigenfunction expansion are developed to solve the equations of plate bending problem. the result can be derived by analytical method

    在平面彈性問題中，由變量代換及變分原理，方程可導向哈密頓體系，從而通過分離變量法及共軛辛本徵函數向量展開法，以解析的方法來進行求解。
  3. A dynamic interaction schematic of an end bearing or elastic bearing pile with arbitrary force at pile top is founded. by using helmholtz resolution and the operator decomposition method, biot ' s equations governing motions of a porous solid saturated with interstitial fluid are decoupled

    建立飽和土中端承樁和摩擦樁在任意激振力作用下的理論模型，利用位移勢函數及微分運算元分解方法，得到飽和土層biot動力固結方程的分離變量解。
  4. For the mass of a typical cluster of galaxies, it happens at a few million light - years from the center

    對于典型的星系團質量而言，轉變處則離中心約數百萬光年。
  5. The 00 ( object - oriented ) technique of standard template library with ansi / iso c + + is used in designing the program, and the dynamic access mechanism and the startup with zero content are realized by using the specialization and inheritance object of vector template class as the data container which can change the content itself according to the number of discretization node data of a computing practicality. so, the fact that the use of the static ems memory which is not necessary is avoided

    在設計面向對象有限元程序中運用了基於ansi isoc + +標準模板庫（ stl ）的技術，以向量模板類的特化繼承對象為變容量數據容器，實現了可按計算實例的離散結點數量動態存取數據的機制和數據容器的零容量啟動，從而避免了運算時系統對靜態內存空間的超量佔用。
  6. This article describes a way of special ultrasonic system which monitors thermal stress in seamless welded rails. this monitoring system is a non destructive testing system, which adopts avr mcu and high - precise time chip processing as the core of it, and adopts the critically refracted longitudinal wave as the object of measuring. my studying focuses on the theory of the monitoring system, which will be listed in this arctile : according to the snell theory, the theory of motivating of critically refracted longitudinal wave is described in details, and the finite element software is used to emulate the propagating course. the formulas of calculating the pts of swr are taken from the acoustoelasticity theory, and the calculating the parameters is introduced. according to assemble materials, three kinds of ways of monitoring the pts of swr using critically refracted longitudinal wave are described, which are measuring the sound - time in changeless distance, ultrasonic critical - angle refractomery and frequency spectrum, the first way of ways is used in this experiment system. the factors, which effect the monitoring system, are assaid in some degree based

    本文的研究工作重點在無縫焊接鋼軌溫度應力測量系統的理論模塊，包括根據snell原理，研究極限折射縱波的激發機理，並使用有限元軟體ansys進行模擬;根據聲彈性理論以及公式推導出計算無縫焊接鋼軌中的溫度應力的公式，並對其中參數的求解方法進行介紹;根據收集的資料，介紹了三種使用極限折射縱波測量無縫焊接鋼軌溫度應力的方法，即固定距離測量聲時法、臨界角折射法和頻譜分析法，本實驗系統使用的是第一種;根據實驗經驗以及相關資料，分析了影響極限折射縱波測量溫度應力的幾個因素，並提出了相應的解決方法;根據實驗系統的需要，獨立設計並加工出相關配套的實驗設備，包括實驗鋼塊、有機玻璃楔塊、固定件、載荷外框裝置等。
  7. In the present work, water plasma ion implantation, instead of the conventional oxygen plasma ion implantation, has been employed to fabricate soi materials. the masses of the three dominant ion species in the water vapor plasma, h2o +, ho +, and o +, are very close to each other, which overcome the problem of co - existence of o and 02 in oxygen plasma source. the oxygen depth profiles in the water plasma ion as - implanted silicon do not disperse much, which makes it possible for the formation of single buried oxide ( box ) layer by choosing appropriate implantation energy and dose

    本論文創造性地採用水等離子體離子注入方式代替傳統的氧離子注入方式來制備soi結構材料，由於水等離子體中的三種離子h _ 2o ~ + 、 ho ~ +和o ~ +質量數相差很小，克服了氧等離子體中因o _ 2 ~ +和o ~ +質量數相差大而引起的氧在硅中的分佈彌散，使注入硅后的氧射程分佈相對集中，比較容易退火后形成soi結構材料。
  8. The basic mathematic model and algorithm of independent component analysis and the apply of independent component analysis in noisy mixed images was discussed, a method was proposed of combining wiener filtering de - noising and independent component analysis

    摘要簡要介紹了獨立分量分析的基本數學模型和演算法，在此基礎上探討了獨立分量分析在有噪混合圖像分離中的應用，提出了一種結合維納濾波去噪與獨立分量分析相結合的解決方法。
  9. In or der to im prove the index precision, the keywords of classification on im age database is used for for m ing a three - level sem a ntics network, and then a unified fra m ework for sem a ntics and feature based relevance feedback in region - based im age retrieval is described, which is experim e nted by irrelatively adjusting the keywords and the weights in the distance m easuring

    根據檢索要求，應用圖像庫的分類關鍵字建立圖像語義網路，採用一種綜合圖像中多數區域特徵的匹配策略，以及建立區域語義和低層特徵無縫結合的相關反饋檢索框架，通過不斷調整檢索關鍵字、檢索向量與距離測度中的權重系數的方法提高檢索準確度。
  10. 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
  11. Offline control strategy refers to work under known load condition, according to the load condition calculate the instruction voltage, then store them in the datasheet, each time read the instruction voltage from the datasheet, when input dc bus voltage changes, a pi controller is used to adjust the instruction voltage thereby fix the output voltage rms

    離線型控制是指在已知負載的情況下，計算出控制用的指令電壓，存在數據表中，每次讀取表中的數據，當輸入母線電壓變化時通過pi調節調整指令電壓來控制輸出電壓。由於計算量不大，用單片dsp就可以實現指令電壓的計算和svm演算法，主要用於負載情況已知且固定的場合。
  12. In this paper, the problem of portfolio selection containing the asset without risk is discussed when the anticipated rates are fuzzy numbers

    摘要從模糊性的角度考慮選擇存在無風險資產的投資組合問題，對于收益率為模糊數的情形，在每一置信水平上，以偏離中心值的程度作為風險的度量。
  13. They are present in soils in such small quantities that it is difficult to achieve satisfactory separations.

    它們在土壤中的數量很小，要實現滿意的分離是有困難的。
  14. The aim of the software is to optimize and control the operation of fermentation process. the dissertation focuses on : 1. the kinds of parameters measured in fermentation process are analyzed

    分析了抗生素發酵過程中參數的類型，如按照性質可以分為：物理參數，化學參數，生物參數等，按照測量方法可以分為：在線測量參數，離線測量參數和軟測量參數。
  15. Thirdly, through assaying the error generated during measuring data, the result manifests : 1 ) the location installed of the transducer and the point thumped affects the experiment result to some extent. if surface - opening cracks is deeper, the location of the transducers installed and the point thumped should be further away from the location of surface - opening cracks. 2 ) when the depth of surface - opening cracks is near to 50mm, it is very difficult to measure the depth of surface - opening cracks because the depth of r _ wave conveying in concrete plates from the different small ball bringing forth exceeds 50mm. 3 ) it is clear from the experiment result, the influence is n ' t big for the diameters of small balls to measure the data while the time interval between two transducers touched firstly has very big influence on the result

    其次，對測量數據進行了誤差分析，結果表明： （ 1 ）傳感器及敲擊點的位置對實驗結果有一定的影響，當開口裂紋的深度較深時，傳感器和敲擊點的位置應該離裂紋較遠； （ 2 ）當開口裂紋深度接近50毫米時，由於實驗中所使用的小球產生的r波傳播深度均超過50毫米，故很難測量出其開口裂紋的深度； （ 3 ）實驗發現，小鋼球直徑的大小對裂紋深度的測量結果影響並不是很大，但是，波的開始上升和下降點的測量精度（即兩信號的時間延遲） ，對測量的結果有很大的影響。
  16. While in traditional elasticity mechanics, we make our best to eliminate the unknown variables and can get the simplest equation in a brief form. at the same time, the rank of equation is increased, so we cannot solve the equation by direct method and have to resort to semi - converse method

    而傳統的彈性力學，其求解方法是盡量消元以使未知量減少，方程形式簡單，寧可讓方程階次提高，故數學物理方法中最基本的分離變量法就難以實施，只能採用半逆法。
  17. The main contents of this thesis include : ( 1 ) summarize and analysis of the theories on vibration transmission through rolling element bearings ( 2 ) based on the threshold setting and signal ’ s statistical approach, a method for solving the problems of denoise was developed ( 3 ) using sparsity and clustering, the method and hypotheses for underdetermined blind source separation was studied ( 4 ) the method based on potential function clustering was given for underdetermined blind source separation of noisy signals based on the assumption that the input distribution is sparse and the mixture procedure is linear, the attenuation matrix and the delay matrix were estimated by clustering. the approach was experimentally illustrated for the case of m = 2. the separation of the signals from bearing test bed proved that the given methods are available and reliable

    在需求分析和研究現狀分析的基礎上，本論文針對如下內容進行了重點研究: （ 1 ）以滾動軸承為例，對旋轉機械振動信號的傳輸進行了歸納分析; （ 2 ）通過設定某一門限並研究信號間的統計特性，研究了旋轉機械振動信號的盲源分離過程中噪聲消減策略; （ 3 ）應用稀疏信號分析和聚類分析方法，對盲源分離中欠確定問題的假設條件進行探討並對分離方法進行了分析; （ 4 ）採用基於勢函數聚類分析的方法，研究了欠確定前提下含噪聲測量過程中信號盲源分離方法。
  18. Abstract : we aimed at resolving a practical problem, i. e. the parameters in the process of oil dehydration and transpotation are coupling. for this purpose, the use of multi _ variables state feedback predictive control arithmetic to control the pressure and oil _ water interface system of free water dehydrator was studied. the result of control is satisfactory. the pressure and interface are stable, and the quality of dehydration is good

    文摘:針對聯合站游離水脫除器脫水轉油過程中參數關聯嚴重這一實際問題，研究了將多變量狀態反饋預測控制應用於游離水脫除器油水界面和壓力控制系統，控制效果令人滿意，壓力、界面穩定；脫水質量合格
  19. 3. algebraically explicit analytical solutions of two - buoyancy natural convection in porous media applying the approach of separating variables with addition, the thesis derives three sets of simple and clear algebraically explicit analytical equations describing the natural convection in porous media with both temperature and concentration gradients. besides the theoretical meaning, they are more valuable for be the benchmark solutions to check and improve the computational fluid dynamics and computational heat and mass transfer

    三、多孔介質中溫度與濃度梯度耦合自然對流基本方程的代數顯式解析解本論文對王補宣院士等給出的反映多孔介質中溫度與濃度耦合自然對流的五元非線性聯立偏微分方程，利用加法分離變量法，導出了三套比較簡明的代數顯式解析解。
  20. This is due to the incompatibility of helium with the matrix atoms. but on the whole, the trend of helium distri bution by the determination was similar to that by calculation. and the depth which helium - 3 could reach in both samples were 350 microns and 500 microns respectively

    在金屬鋁中氦行為的理論研究中，基於密度泛函理論、廣義梯度近似、贗勢平面波方法，計算了單個he原子在金屬鋁中的各種能量數據，包括各種he原子-缺陷的形成能、遷移能、束縛能以及離解能數據。
分享友人
分享到 Line

分享到臉書