方向性函數 的英文怎麼說

中文拼音 [fāngxiàngxìnghánshǔ]
方向性函數 英文
directivity function
  • 方 : Ⅰ名詞1 （方形; 方體） square 2 [數學] （乘方） involution; power 3 （方向） direction 4 （方面） ...
  • 性 : Ⅰ名詞1 （性格） nature; character; disposition 2 （性能; 性質） property; quality 3 （性別） sex ...
  • 函 : 名詞1. [書面語] （匣; 封套） case; envelope 2. （信件） letter 3. （姓氏） a surname
  • 數 : 數副詞（屢次） frequently; repeatedly
  • 方向 : direction; orientation
  • 函數 : [數學] function函數計算機 function computer; 函數計算器 function calculator; 函數運算 functional operation
  1. Third, based on the non - linearity feature of the system, the lmf algorithm is given by using the non - linearity least square optimal method. the simulating results show that the accuracy of the algorithm approaches the cramer - rao - bound. finally, the radial based function network localization algorithm is present for bistatic sonar

    為了克服lmf演算法在進行迭代時依賴于初始值的缺點，根據人工神經網路在求解非線性問題方面的特點，提出了用徑向基函數網路方法來進行雙基地聲吶定位的優化演算法。
  2. Aiming at the study actuality of fan performance monitoring system and analysis of fan performance curve changes affected by inlet - box and the different fixed - angles of guide blades in the course of installation, a fan flow monitoring model based on rbfnn in whole flow zone was established in this thesis. in the model, the method of no throttle and fan performance curve were used as basis. and on the basis of that model, fan performance curves of 4 - 73no. 8d were approached with experimental data of different speed, different opening - angles of guide blade and different resistance of pipeline, the precision and the error law of model were studied

    本文針對電站風機性能監測系統研究較少的現狀，在實驗的基礎上分析了現場加裝進氣箱和由於安裝造成的導流器葉片開度不一致對風機性能曲線的影響，並在此基礎上採用無節流方法測量流量，以風機調節性能曲線為依據，建立了基於徑向基函數（ rbf ）神經網路的風機流量全程監測模型；以實驗室4 - 73no . 8d離心風機為研究對象，探討了rbf神經網路差壓模型在變轉速、變導流器開度和變管網阻力等工況下的應用精度和誤差分佈規律；最後用visualc + +語言開發了風機性能在線監測系統。
  3. The source time function directivity is in accordance with the p waveform directivity, clearly showing that the nodal plane of strike 199 is the fault plane and that the earthquake ruptured unilaterally from the northeast to the southwest

    震源時間函數的這種方向性效應與p波的方向性效應相一致，清楚地表明：走向為199的節面為斷層面，地震是從東北向西南方向單側破裂的。
  4. The control of beam halo - chaos becomes a critical problem in the development of high intensity accelerator. efforts to remove the halo by collimation have been largely unsuccessful since the halos almost always regenerate. the mechanisms of halos are complex, such as nonlinear resonances and chaotic behavior etc. considering this, professor fang jin - qing who works in china institute of atomic energy pointed out that the theory of chaos control can be used to control beam halos. he presented the method to control halos by using nonlinear functions, which means nonlinear function g is added to the right of ion radial self - edlctric force equation and some nonlinear function are selected to control beam halos in simulations. in paper [ 69 ], controllerg = - 0. 15sin ( rmax - am ) 2 was used and the halo intensity was decreased to 0. 1078, the halos are removed partly

    束暈?混沌的控制是新一代強流加速器研製的關鍵問題，隨著強流離子束應用前景的日趨廣闊而日益成為研究的熱點。傳統機械限束器因無法解決束暈的再生而收效甚微，因為束暈的形成有著其內在動力學機制?非線性共振以及混沌等。基於此，中國原子能科學院研究員方錦清將混沌控制的理論和方法開創性的運用於束暈?混沌的控制上，提出了控制束暈?混沌的非線性控制策略，即在粒子徑向所受束自生場力方程的右邊加上非線性控制函數g ：並選取一些非線性函數如等進行了控制的模擬研究，將束暈強度控制在0 . 1078左右，取得了初步的控制效果。
  5. The detail is clarified as follows : l ) based on the chaotic technology and contemporary encryption approach the paper put forward a new chaotic sequence, which introduced the m - sequence and the method of shrink key - the stream generator. the complexity of the sequence was promoted as the random alteration of the parameters of chaotic mapping, and at the same time, the shrinking key was used to enhance the security further more ; 2 ) the performance of one - way hash function was improved and new hash function construction methods are proposed through a novel hash method based on chaotic mapping and the aes - the rijndael algorithm. the algorithm of hashing messages of arbitrary length into 256 bits hash values was designed

    按照這種方法，輸出序列的周期性得以大大提高，理論分析和計算機模擬結果表明，該方法可以產生具有良好統計特性的密鑰流，而且易於軟硬體實現： 2 ）實現了一種基於混沌映射和分組密碼rijndael演算法的單向hash函數的構造方法，即使用logistic混沌映射產生混沌二值序列，序列的分組與明文序列分組進行按位異或后，進入rijndael加密模塊，所得的結果再加入到反饋端，參與下一分組輸入的異或運算，迭代結束時的rijndael加密結果即為所求的hash函數值。
  6. Proposed an improved algorithm for traditional radial basis functions used in image morphing technology. based on polynomial, the new basis function is continuous at subsections junctions, and introduced the direction - correlating control function. this algorithm keeps the boundaries of local morphed image subtle, and gets rid of some unreasonable warping resulted from isotropy with traditional radial basis functions. experimental results show that good local morphing results can be achieved

    針對傳統的圖像變形技術中所採用的徑向基函數，應用在局部變形中的不足提出了一種改進方法:構造了基於多項式的分段連續基函數，並在此基礎上引入了與方向相關的控制參數.該方法在圖像局部變形的邊界處具有光滑的過渡，同時克服了傳統徑向基函數的各項同性所導致的不合理變形現象.實驗表明，該方法具有良好的局部變形效果
  7. The algorithm have the good one - way property, high sensitivity to initial values and good security due to the intrinsic characteristic of chaotic system and rijndael algorithm. the simulation experiment demonstrates the convenience and good hash performance ; 3 ) a new scheme of digital voice secure communication was proposed based on chaotic modulation without additional synchronization. the modulation sequence generated by chaotic logical mapping was used to encrypt the digital voice signal

    混沌系統和rijndael演算法的固有特點使該演算法具有較好的安全性、對初值有高度的敏感性以及較好的單向性能，並且易於實現，是一種有效的單向hash函數； 3 ）研究了一種無需同步的基於混沌調制的數字語音保密通信系統的方案，利用邏輯映射產生混沌調制序列，以該序列作為密碼對數字語音進行加密處理，為了更好的隱匿信號特徵，混沌調制在小波分解的基礎上，對不同的通道使用不同的參數進行，並借鑒混沌掩蓋對信息信號進行了限幅處理，使密文完全隨機化。
  8. A smoothing technique is combined with optimum approximation and finite element piece - wise interpolation in the method, it can simultaneously process measured vector components, imp ro ve smoothing capability of solution, space composed of original discrete points and increase the accuracy of the solution, especialy its derivatives

    該方法結合最佳逼近、有限元分片插值與光順技巧，對測量向量各獨立分量進行處理，改善了原離散點構成的解空間的光滑性，提高了解尤其是導數場的精度，在測量區域內再現了光順向量函數及連續的導數。
  9. This thesis analyzes circle array ’ s performance and employs different arithmetic accordingly ; transforms circle arrays to line arrays by mode transform ; analyzes the space geometry antenna ’ s pattern function

    本文分析了圓形陣列的性能，在此基礎上應用了不同的演算法;利用模式轉換將圓形陣列轉化成為虛擬的線陣，並且分析了共形天線的方向圖函數。
  10. Taking erectophile type continuous vegetation as a example, authors had done many monte carlo simulations, and established empirical analytic expressions of radiances with component temperature, soil emissivity and leaf area index. empirical analytic expressions were used to construct objective function and genetic algorithm was employed to synchronously retrieve 5 parameters, such as component temperature, soil emissivity and lai, from thermal infrared 2 channels and 2 angles data. many experiments of genetic algorithm inversion from simulated data were conducted, results show that it is very robust to retrieve component temperature using genetic algorithm ; genetic algorithm can cope with uncertainty inversion problem pretty well if full advantage of priori knowledge was taken. comparison between inversion results and ground - truth data has been done. this paper offers a new example to retrieve component temperature from multi - channel, multi - angle thermal infrared data based on the model of directionality of thermal radiance

    在熱輻射方向性規律的基礎上，以喜直型連續植被為例，進行了大量的monte carlo模擬，建立了輻射亮度和組分溫度植被葉面積指數及土壤比輻射率之間的經驗函數關系。採用遺傳演算法，從熱紅外2個波段2個角度數據中，同時反演混合像元組分溫度土壤比輻射率和葉面積指數等5個參數。通過對模擬的觀測數據進行大量的遺傳演算法反演試驗，結果表明，遺傳演算法反演組分溫度非常穩健，在寬松的先驗知識條件下，遺傳演算法可以解決不確定性反演問題。
  11. Aiming at the control feature of large ship, the authors designed a 2 - rank derivative multi - step neural network predictive model and the algorithm of the large delay ship ' s course, and presented a fuzzy control autopilot scheme based on the model with rbf neural network and fcmac controller, it solved problems of model online identification and controller online design in traditional adaptive control, so that the high precision output follow - up control of large ship with large delay and uncertain nonlinear features can be realized

    摘要針對大型船舶控制特性，設計了船舶航向的神經網路二階導數多步預測模型及其辨識和預測演算法，提出基於徑向基函數神經網路多步預測模型和模糊小腦模型關節神經網路控制器的大時滯船舶航向模糊控制自動舵方案，解決傳統自適應控制中模型的在線辨識和控制器的在線設計問題，以達到對具有大時滯、不確定非線性特性的大型船舶實現高精度輸出跟蹤控制。
  12. The result obtained in this study shows that : the source time functions retrieved from p - and s - waves recorded at different stations distributed at different azimuths show prominent directivity

    結果表明：從不同方位臺站的z分向p波和sh波提取的震源時間函數顯示了明顯的方向性效應。
  13. The support vector machine is much better in the aspects of the function expression, generalization and efficiency than the traditional artificial neural network. it solves the problems : model selection, overfitting, nonlinearity, dimensions, the lowest point in local, and so on

    支持向量機方法在函數表達能力，推廣能力和學習效率上都要優于傳統的人工神經網路，且很大程度上解決了傳統方法存在的問題:如模型選擇、過學習、非線性、多維問題、局部最小點問題等。
  14. The new method is a combination of characteristic approximation to handle the convection part, to ensure the high stability of the method in approximating the sharp fronts and reduce the numerical diffusion, a smaller time truncation is gained at the same time, and a mixed finite element spatial approximation to deal with the diffusion part, the sealer unknown and the adjoint vector function are approximated optimally and simultaneously

    此方法即為對方程的對流項沿流體流動的方向即特徵方向進行離散，從而保證格式在流動鋒線前沿逼近的高穩定性，消除了數值彌散現象，並得到了較小的時間截斷誤差；另一方面，對方程的擴散項採用混合元離散，可同時高精度逼近未知函數及其伴隨向量函數，理論分析表明，此方法是穩定的，具有最優的l ~ 2逼近精度。
  15. Forth, this thesis also had made a preliminary discussion on the integrated guidance system of air - to - air missile beyond visual range air combat and made deep research on the midcourse guidance stage, thus we obtained an extremely useful conclusion.

    本文還對空空導彈超視距攻擊的復合制導體製做了一個初步的探討，並對其中的中制導階段進行了深入研究，得到了一個十分有用的結論:即中制導階段導彈發動機的最優推力方向實際上應該是關于時間的線性函數。
  16. Nonlinear ridge regression modeling method based on radial basis function and its simulation research

    基於徑向基函數的非線性嶺回歸方法及模擬研究
  17. First, the backward kolmogorov equation for the conditional reliability function and the pontryagin equation for mean first - passage time and then - associated boundary and initial conditions are derived based on the stochastic averaging methods for quasi non - integrable, quasi integrable and quasi partially integrable hamiltonian systems, respectively

    首先利用擬不可積、擬可積非共振及擬部分可積非共振hamilton系統的隨機平均法分別給出了研究該系統首次穿越問題的提法，包括計算條件可靠性函數的後向kolmogorov方程及計算平均首次穿越時間的pontryagin方程及其邊值條件。
  18. For elastic reigistration of non - rig id body, after the thin - plate splines for image registration is analysed, the local elastic registration is presented, which usilizes a positive definite function with compact support as the radial basis function of interpolation

    對于非剛性物體圖像的彈性配準，本文先分析了基於薄板樣條彈性配準方法，總結了其不足之處，通過採用一種緊支正定函數作為插值方法中的徑向基函數，實現了圖像的局部彈性配準。
  19. In conclusion, based on radial basis function neural networks, a method of identifying vehicle steering angle is proposed for further investigation of the vehicle handling inverse dynamics. the identification results show that the method is not only feasible, but also with high accuracy, little computation requirement and good stability

    綜上所述，本文利用徑向基函數網路建立了汽車橫擺角速度響應與方向盤轉角的非線性映射關系，根據模擬試驗測得的數據，由汽車的橫擺角速度響應識別出了方向盤的轉角輸入，具有很高的精度和抗干擾能力。
  20. The green ' s function for point - source excitation is also very simple in homogeneous media. however, since global basic functions like plane waves occupy the entire domain and point source excitation radiates to all directions, their evolution through a non - homogeneous medium constitutes a problem that may become at least as difficult to solve as that of the propagation of the total field

    例如dirac函數（點源）在空間域可以有精確的定位，但在傳播方向上（波數域）卻毫無確定性；而平面波（波數域的基本解）則具有精確的傳播方向，但其波前卻是無限延伸的，不具任何空間局域性。
分享友人
分享到 Line

分享到臉書