推導長度 的英文怎麼說

中文拼音 [tuīdǎozhǎngdù]
推導長度 英文
length of derivation
  • 推 : 動詞1 （向外用力使物體移動） push; shove 2 （磨或碾） turn a mill or grindstone; grind 3 （剪或削...
  • 導 : 動詞1. （引導） lead; guide 2. （傳導） transmit; conduct 3. （開導） instruct; teach; give guidance to
  • 長 : 長Ⅰ形容詞1 （年紀較大） older; elder; senior 2 （排行最大） eldest; oldest Ⅱ名詞（領導人） chief;...
  • 度 : 度動詞[書面語] （推測; 估計） surmise; estimate
  • 長度 : length; longitude; size; extent; footage
  1. And then facing the problem of the channel estimation of the adaptive modulation system, we conclude out the channel estimation algorithms on maximum likelihood ( ml ) estimation and maximum a posteriori ( map ) estimation under the condition of flat fading channel and selective fading channel in detail. to meet flat fading channel, we simulate the relationship of the ratio between the error covariance in map estimation and ml estimation and pilot symbol message length. the conclusion can be drawn from these results

    接著，對自適應調制系統中的通道估計問題難點，詳細推導了平衰落通道條件下和選擇性衰落通道條件下最大似然（ ml ）估計和最大后驗概率（ map ）估計演算法，針對平衰落通道，我們模擬了map估計和ml估計的方差與導頻符號長度的關系，模擬結果表明，錯誤方差受多譜勒頻率的變化影響最大，並且對實際的自適應調制系統，導頻符號長度的取值超過20個符號長度時， map通道估計明顯優于ml通道估計。
  2. Fist of all, on the basis of the research of agone boffins, this author investigates the interaction mechanism of bolts and rock, and introduces the elastic ? lastic analytical resolution which is consist of the liner structure, the equivalent reinforced wall rock and the original wall rock in the simple loading from the equivalent well - proportioned view ; this solution is very important meaning for the engineering design. on the basis of coulomb friction model, the author introduces the finite element equation of the contact problem in order to provide the academic foundation for the application of msc. marc. finally, combining the engineering practice of the non - linear analysis of shield tunnel through yellow river of the south - north water transfer and using the model of friction, the author researched the evolution law of stress and displacement field in the structure of grouted rock bolts, and analyzed the effect to the stress and deformation of surrounding rock mass due to anchor supports

    首先，在前人研究成果的基礎上，對錨桿與圍巖的相互作用機理進行研究，利用全長錨固錨桿的中性點理論，從等效均化的角度來考慮錨桿對圍巖的加固作用，並推導了在簡單荷載作用下，含有襯砌、等效加固后的圍巖、原始圍巖三者的彈塑性解析解，對工程設計有著重要的參考意義；在數值模擬方面，以考慮錨固圍巖滿足規則化庫侖摩擦模型為基礎，利用虛功原理推導了接觸問題的有限元方程的計算格式，為開發運用大型商用有限元軟體msc . marc提供了理論根據，也形成了本文的理論基礎：最後，論文以南水北調東線穿黃隧洞穩定性分析項目為工程實例，利用本文所述的接觸問題的摩擦模型理論，對錨桿支護結構的應力場、位移場的變化規律進行了研究，分析了加錨支護對隧洞圍巖應力、變形的影響。
  3. The next move is to deduce the range of a bombing radiating wavelength with the flying bomb ' s temperature being analyzed and to compute the target ' s irradiance and radiated luminance between spectral penetrating strip based on the planck formula for the black body

    在此基礎上，從分析飛行彈體的爆炸溫度出發，推導了彈體爆炸時輻射峰值波長的范圍，分析了黑體輻射的普朗克公式，計算出目標在光譜通帶內的輻出度和輻射亮度。
  4. In order to obtain the most economic benefits, the paper utilized the theory of " homalographic characteristic " and " share alike compensation current characteristic " to build up the best compensation relation for " hour - current " curve applied to transformer substation and for " length - current " curve applied to distribution line

    以獲得最大經濟效益為目標，利用「等面積特性」和「補償電流等分特性」理論。推導了應用於變電站的「時間?電流」曲線關系中存在的最佳補償關系，以及應用於配電線路的「長度?電流」曲線關系中存在的最佳補償關系，及補償后的經濟效益計算模型。
  5. First, it was taken that a discuss about the effects of geometry parameters of each piezocrystal on direction parameters ( main lobe width, side lobe amplitude, elimination of grating lobes ), amplitude of ultrasonic pressure, element viberation pattern, mutual radiation among elements, efficient test regions, ability to keep accurate and near - field distance and so on. based on the direction of ultrasonic field in ulpa deduced by ourselves. in addition, on the base of integrating all kinds of factors, it was put forward that the principle and method for optimized design of geometry parameters of piezocrystals in ulpa transducer, and its design programme and interface were compiled

    首先在推導超聲相控線陣換能器聲場的指向性的基礎上，就各個晶片幾何參數對指向性指標（主瓣寬度、旁瓣幅度、消除柵瓣） 、聲壓幅值、陣元振動模式、陣元間互輻射、有效檢測區域、精確控制能力、近場長度等方面的影響進行了論述，並在綜合各方面影響的基礎上，提出了晶片幾何參數優化設計的原則和方法，編寫了設計程序和界面。
  6. A new fractal - based infrared image feature extraction method is presented and the detailed theoretic analysis and implement procedure of this algorithm is submitted and tested in some experiments. with the limitation of the line detection based on traditional hough transform that the information of the length and the end points of the line is unavailable, a new algorithm which makes use of the accessional strategy based on precognition information is put forward to meet the demand for more information of the line, simulation results show this method is effective. finally, the whole process of airport target recognition is presented and the result images are also given

    使用分形方法提取目標的特徵，在知識指導下，提出了一種基於目標特徵模型的降維的形態學分形維數計算方法，對傳統分形方法進行了改進，從理論上推證了演算法的合理性，並對演算法進行了模擬分析；針對傳統hough變換無法獲得線段端點和長度信息的局限性，提出了一種基於目標特徵先驗知識的hough變換融合策略，通過引入目標先驗知識，可以有效地獲得直線信息；對信息多而復雜的機場目標採用基於知識的目標識別方法，使用置信度模摘要型實現不確定推理，對目標進行識別判斷，將知識貫穿于整個識別過程中，對目標進行了有效地識別。
  7. The mathematical model by which the forming time can be precisely calculated is ratiocinated. this model shows that in sls the scanning " delay " phenomenon can make the actual forming time greatly exceed the theoretical time, and the total number, total length of the scanning lines and the scanning speed have different effects on the scanning " delay "

    本文推導出了sls成型時間精確計算的數學模型，該模型顯示在sls加工中的掃描「延時」現象會造成實際成型時間遠遠大於理論時間，並且掃描線條數、掃描線總長和掃描速度對掃描「延時」有不同程度的影響。
  8. In astronomical coordinates ( reference mark is north latitude 43. 9 ), analyzed is the effect of azimuth angular velocity, acceleration and altitude angular velocity, acceleration etc. some formulae were given to compute all correlative quantities. with regard to the course of data processing beforehand, the thesis focuses on outliers eliminating technology because of outlier increasing acutely of high - elevation tracking ( approaches 10 - 20 % )

    在觀測坐標系中推導出確定天頂盲區理論范圍公式和滿足過天項跟蹤條件的關系式；在天文坐標系中以長春衛星觀測站（北緯43 . 9 ）作為計算基準，分別討論了方位、俯仰方向的角速度、角加速度等對天頂盲區的影響，在理論分析上為解決過天頂跟蹤問題打下了基礎。
  9. This paper derived the transfer matrix of the bilayer structure composed of left - handed and right - handed materials, and computed the density of states ( dos ) along the axis of the finite one - dimensional photonic crystal, which was constructed out of n such bilayer structures periodically

    摘要推導出了由左右手材料構成的雙層結構的轉移矩陣，計算了由n個該雙層結構周期性排列所形成的一維有限長度光子晶體沿其軸線方向的態密度。
  10. A markov model is used for calculation of dcf throughput. it is disclosed that the key parameters are the number of contending stations and the length of contention window. the maximum throughput and the best parameters are offered by theoretical analysis

    對dcf部分，利用markov模型推導網路吞吐量性能，指出競爭站點數和競爭窗口長度是關鍵性能參數，從理論上給出最大吞吐量和最優參量值。
  11. Because of the digitally rebalanced circuit, the sensor is capable of achieving better static and dynamic characteristic, higher sensitivity and stability. in this paper, the propagation path of light in the step index fiber and graded index fiber is introduced firstly. then the paper sets up the coupled power model and develops the coupling function

    在文中，首先介紹了光線在階躍型光纖和梯度折射型光纖中的傳播路徑，以及在一端鍍有反射膜的1 4波節長度的grin透鏡中的成像規律，並推導了光功率耦合函數。
  12. Specially for the particularity of the path - length control system in the laser gyros consist of total reflecting prisms and the necessity of identifying the parameters in the system, the mathematical model of the temperature control system in the trp laser gyros is presented, and three new identifying algorithms are deduced in theory based on the method of the least squares : algorithm of immediately identifying, algorithm of instrumental variables and recursion algorithm

    摘要針對全反射棱鏡式激光陀螺腔長控制系統的特殊性及其模型參數辨識的必要性，給出trp激光陀螺溫度控制系統的數學模型，並基於最小二乘法從理論上分析推導出3種新型參數辨識法：直接辨識演算法、輔助變量法和遞推演算法。
  13. Therefore, the safety of bulk carrier is widely concerned ; the theory of insubmersibility is followed by the introductions of domestic and international regulations, solutions, rules and requirements on the floodability ; introduced are the conditions of hold in flooded condition, and provided are the calculation methodology of the stability and buoyancy when flooding. the concept of cargo permeability is concretely defined, and the calculation methods of the amount of flooding waters are executed ; the application of the influence numbers simplify the calculation of the still water bending moment and shearing force in flooded conditions. a new method to calculate the maximum still water bending moment and shearing force is developed by means of the influence numbers ; the simulation system provides a means of evaluation and forecast on ship ' s danger extent after ship is damaged

    在抗沉性公式的推導過程中採用一些假設，並分析了這些假設對結果的影響；然後介紹了船舶強度的概念和計算方法，鑒于現有的剪力彎矩計算方法工作量大、效率不高的缺點，引用影響數計算船舶進水后的剪力和彎矩；最後根據船舶抗沉性理論對散貨船破艙進水進行模擬，在模擬中根據船舶破艙的實際危險情況，採用直觀的圖形輸入的辦法，判斷船舶的危險程度並計算船舶到達危險狀態的時間以助於船長做出正確快速的決策。
  14. The fourth chapter " reseach on fractai structure of stock price " anaiyzed the fractai structure of stock price, deduced the investment function, caiculated the hurst exponent, 3 correlation dimension, and max lyaponov exponent, analyzed the self - similarity, long range dependence, circulation period of stock price and sensitivity of stock price to the initial value, suggested took the exponent characterize fractal instead of variance as instrument to measure risk

    第四章分析並檢驗了股票市場的分形混沌特徵，推導了投資函數，計算了表徵股票市場分形特徵的hurst指數，關聯維和最大lyapunov指數，分析了股票價格的自相似性、長期記憶和循環周期，分析了股票價格的波動對初始條件的敏感性，提出中國股票市場具有混沌分形的特性，用傳統的方差法度量股票風險是無效的，必須使用混沌分析能夠理論來刻畫股票收益的風險，建立收益模型。
  15. On the basis of analyzing the rolling walking of spherical robot, this paper derived the condition of taking off, obtained the differential equation of jumping movement of spherical robot by the use of lagrange equation, and gained the formulae of jumping height and jumping length of spherical robot by means of solving the differential equation of this jumping movement

    在分析球形機器人滾動行走的基礎上，推導出了球形機器人的起跳條件；利用拉格朗日方程得到了球形機器人跳躍運動微分方程；通過求解該跳躍運動微分方程得到了球形機器人跳躍高度和跳躍長度的公式。
  16. 4. according to the cefgshg, the fundamental light radius was optimized when the length of bbo crystal was constant. 5

    根據所推導的高斯光束倍頻轉換效率公式，對bbo倍頻晶體在長度確定的情況下，對基頻光斑進行了優化。
  17. Considering the similitude law for shaking table test, we study the test results and obtain some conclusions which are a ) generally, the silty soil in test box liquefies and the liquefied time has relation with the amplitude of acceleration, b ) when the intensity is on and above eight degree, the silty soil deposit will be liquefied dramatically, c ) the relationship of the pore water pressure is relevant to the cycle loading which represents when the cycle loading ranges from little to great, the relationship is represent as a concave curve, or else as a protruding curve and tends to stability. ( 3 ) based on the triaxial compression test and the resonant column test, some studies are made such as a ) the duncan - chang parameters of constitutive model, b ) the dynamic shear modulus ratio and c ) the damping ratio of the site soil deposits. in order to deal with the test data, a computer program is compiled

    （ 2 ）利用小型振動臺進行了k _ 0固結狀態下粉土的振動液化模擬研究，通過分析正弦荷載作用下的試驗資料，驗證了粉土的孔隙水壓力增長模式的合理性；從微分方程推導了基於土體振動臺模型試驗的相似律，並從模型實體、孔壓時程曲線和相似律等方面做出了分析，得出了如下結論：在小型振動臺試驗中，模型箱中的粉土都發生了液化，液化的時刻和輸入加速度幅值有關，而對頻率的變化不太敏感；粉土在相當於8 9度地震烈度的加速度幅值作用下可能產生嚴重的液化；孔壓的增長曲線形狀與施加的荷載有關：當施加荷載為由小到大的形式時，曲線形狀為上凹的曲線；當施加荷載為等幅的正弦荷載或荷載幅值由大到小時，曲線形狀為上凸的曲線，且逐漸趨于穩定。
  18. The nucleotide ( nt ) sequence of the insert in phz1754 is 2299bps in size. computer assisted analysis of the sequence revealed an open reading frame ( orf ) with a g + c content of 70. 3 % that would encode a protein of 552 amino acids ( aa ). the nt seque nce comparision revealed that the orf in the sequenced region exhibits 85 % dna sequence homology with the cholesterol oxidase gene choa of streptomyces sp

    對phz1754進行外切核酸酶（ exonuclease ， exo ）順序缺失，獲得單向長度漸減重疊的系列突變體，核苷酸序列測定顯示出該ecor - sal片段的精確大小為2299bps ， frameplot程序分析揭示出該區域一個完整的開放閱讀框（ orf ）的存在，其大小為1656bps ， g + c含量為70 . 3 ，編碼552個氨基酸，利用blastsearch程序將orf的核苷酸序列及推導的氨基酸序列與因特網上基因及蛋白質數據庫進行綜合比較，發現無論在核苷酸水平還是在蛋白水平上，該orf均與膽固醇氧化酶表現出同源性，而且與鏈黴菌膽固醇氧化酶同源性最高，說明該orf編碼膽固醇氧化酶基因。
  19. It shows that the method suggested in the paper is simple, applicable for engineering and has good precision. on the bases of the formulas deduced, and combining with relative test datas, it studies in the paper several factors influencing the bearing performance of the simple beams, such as shape of the external tendons, the equal moment segment length, span - to - depth ratio of the beam, valid initial prestress of the external tendons, area of the internal tension reinforcement, strength of the concrete, vertical distance between

    在公式推導的基礎上，結合相關試驗資料，研究了體外筋的形狀、等彎矩區長度、梁跨高比、有效張拉預應力、體內受拉筋配筋率、混凝土強度、錨固點到樑上邊緣在垂直方向上的距離、體外預應力筋水平段長度（雙折線型體外筋的情況）以及荷載類型等對體外預應力混凝土簡支梁受力性能的影響。
  20. 3. the coupled - mode theory and matrix theory of lpfg have been studied. based on the erbium - doped fiber which has been chosen for edsfs, smf - 28 of corning corporation and photosensitive fiber of coractive corporation, the optimum fiber grating period, length, the maximum cross transmission wavelength and the relation

    3 .推導長周期光纖光柵耦合模理論及矩陣理論，結合幾種不同的光纖，包括課題中的摻鉺光纖、 corning公司的smf - 28單模光纖及加拿大coractive公司的光敏光纖，利用matlab7建模並結合已確定的長周期光纖光柵的透射譜來優化長周期光纖光柵周期、長度、諧振波長等幾個參數及它們之間的關系，用來指導和優化光纖光柵的製作。
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