指向性函數 的英文怎麼說

中文拼音 [zhǐxiàngxìnghánshǔ]
指向性函數 英文
directivity function
  • 指 : 指構詞成分。
  • 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
  • 指向 : directing; sensing; sense of 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. In the chapter two we discussed that the server would first use speed - 1 to serve customers when the system entered the busy state from the empty state, but when the server found the number of customers in the system exceeded the thresh - n during serving, after finishing the service of current customer it would use speed - 2 to serve the next customer till there is no customer. by the method of supplementary variable, l - transition and constructing vector markov, we attained the distribution of the queue length, the distribution of wait - time, the distribution of stay - time, the utility and etc. in the last part of this chapter, we discussed the optimal n * for thresh n which minimizing the cost function and we illustrate the cost function behaves for various parameter selections by a numerical study

    在本文第二章討論了當系統從空閑進入忙期時是服務臺以速度1進行服務，但一旦對某顧客服務完畢時如發現系統中的顧客數超過n值時就以速度2服務后續顧客直到系統變空的可修排隊系統，通過構造各種向量馬氏過程和吸收向量馬氏過程，獲得了瞬態、穩態隊長分佈、等待時間分佈、逗留時間分佈、更新周期分佈等一系列排隊指標以及可用度、可靠度等一些可靠性指標，在本章最後又從系統如何更好節省費用角度出發討論了門限n的最優取值問題，並利用mathematic軟體對費用函數進行了數值模擬。
  2. A niched - penalty approach is used to transform this optimal kinematical design problem to an unconstrained one. a kinematic accuracy comparison of the genetic designed fine - tuning stewart platform with the quasi - newtonian designed one is made. the comparison results have shown that the kinematic accuracy of the genetic designed fine - tuning stewart platform has a much higher accuracy and a compact structure than that of the quasi - newtonian designed one, which guarantees the accomplishment of high precision trajectory tracking and reduces the disturbance of wind to the feed - supporting system

    以並聯機器人jacobian矩陣的條件數為優化設計的目標函數，提出了基於遺傳演算法的並聯機器人最優運動學性能結構參數優化設計方法，採用實值遺傳演算法，對精調stewart平臺進行了優化設計，得到了最優運動學的精調stewart平臺結構參數，為實現新一代大射電望遠鏡饋源指向跟蹤系統高精度軌跡跟蹤控制奠定了堅實的基礎。
  3. From mathematical models for inverse scattering in two dimensional inho - mogenous media including variable impedance, all kinds of probable mixed variable impedance boundaries and cracks, from interior and exterior trans - mission problems and radiation condition, ill - posed integral equation and indicator function method are formulated for the diverse of boundary iden - tification. it is shown that the kernel of the integral equation characters the boundary of scatterer, which is determined by solving it by virtual of regularity method, meanwhile, some numerical tests are given. 3

    在二維非均勻介質逆散射邊界識別的數學模型（包括一般的非均勻介質，正交各向異性介質，變阻抗介質，各種可能的混合變阻抗邊界問題）下，由內透射問題和外透射問題以及輻射條件，推導了上述介質的邊界識別的積分方程和指示函數方法，由於積分方程的核充分表徵了散射物的邊界，由此說明只要利用正則化方法求解該積分方程，就可以確定散射物的邊界。
  4. The scalar lyapunov function approach and vector lyapunov function approach of stability for large - scale systems are analyzed. and it is pointed out that the restriction of these approaches are only suited for large - scale systems with week coupling among subsystems

    對大系統穩定性的標量lyapunov函數法和向量lyapunov函數法作了分析，指出這些方法只適用於子系統間具有弱耦合的大系統的局限性。
  5. Firstly, this article summarizes consideration modes appeared in share structure reform into 3 kinds, including share adjustment, cash payment, and warrants issuance, and proves that consideration modes of share adjustment are completely equivalent to each other, and that consideration modes of share adjustment are equivalent to cash payment and cash payment is equivalent to warrants issuance when we neglect some subordinate conditions. then it is concluded that when we neglect the subordinate conditions, all kinds of consideration modes can be unified as anyone of them, and comparison between different simple or even complex consideration modes can be made. thus all kinds of considerations can be converted to a discounted ratio of stock price decline to figure consideration price of any listed companies paid in share structure reform

    本文首先將股權分置改革中的對價方式歸納為股本調整類（非流通股股東向流通股股東送股、非流通股縮股、流通股擴股） 、現金對價和權證對價三大類，通過歸納兩類股東的對價水平評價指標，以及兩類股東的對價效用函數變量在一定條件下的相等，通過七個命題依次證明了股本調整類對價方式的完全等效性，以及在忽略一些次要變量的情況下股本調整與現金對價、現金對價與權證對價的等效性，由此得出在一定條件下可以將股權分置改革中的各種對價方式統一起來，以及不同類或者混合的對價方式之間可以比較對價水平的結論，並通過折算的股價降低率來表示上市公司股權分置改革的對價水平。
  6. Based on investigation and analyzed of international & domestic economy and trade, the author analyzed concretely the status quo of technological development in cosco ; introduced the theory & method of calculating science and technology advancement in shipping enterprise ; clarified the idea of " the soul of cosco development is enhancing technological innovation " and the golden thought & rule of the development aiming at weakness & pivotal tache which were existent ; established the whole target and key orientation of cosco development

    作者以調查分析國際、國內經濟和貿易環境為著眼點，具體定性分析了中遠集團科技發展的現狀；介紹了測算航運企業科技進步的理論與方法，並運用生產函數法對中遠的科技進步作用進行了量化分析；針對中遠存在的問題，闡明了「加強技術創新是中遠發展的靈魂」的觀念和科技發展的指導思想和原則；確立了中遠集團發展的總體目標和重點方向。
  7. 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。
  8. After analyzing the existing ambiguity resolution methods the dissertation investigates the baseline rotation method based on the antenna - swap idea, and develops the fixed axis rotation maximum - minimum method ? farmm and the equivalent rotation maximum - minimum method ? ermm applicable for static basement and moving vehicle respectively. the former lowers the demands on rotation device while the latter improves the flexibility of antennae installation. meanwhile the dissertation also brings forward an ambiguity function search method which needs only one single epoch data with the outer aided information, and investigates the accuracy requirements for the assistant pointing information

    其次，通過與gps等多星系統定向關鍵技術的對比分析，指出雙星定向模糊度確定的難度;在分析現有模糊度求解方法的基礎之上，研究了基於交換天線思想的轉動基線模糊度確定方法，並提出了適合於靜基座的定軸轉動極大/極小值farmm法，以及適合於地面運動載體的等效轉動極大/極小值ermm法，前者降低了對轉動機構的要求，後者則提高了天線安裝的靈活性;同時，提出了一種藉助外部輔助信息的模糊度函數搜索法實現單歷元雙星定向，並分析了對外部輔助單軸姿態信息的精度要求。
  9. In the fourth part, by using the bifurcation theory of planar dynamical systems and the method of detection functions, the paper gives a configuration of limit cycles forming compound eyes. with the help of numerical analysis ( usi ng maple ), it is shown that there exist parameter groups such that a z7 - equivariant planar polynomial vector field of degree 7 has at least 36 limit cycles with z7 - symmetry

    然後，對於一組特定的參數值，研究了它的相軌線的變化趨勢；第四部分指出：在一定的條件下，利用平面動力系統分支理論以及判定函數法，在計算機數學軟體（ maple ）的幫助下，得到結論： 7次z _ 7 -等變平面向量場至少有36個極限環，形成具有z _ 7 ?對稱性的極限環分佈。
  10. Powell method is used in the paper to calculate the reliability index, this method can avoid the complexity of partial derivative calculating, and the example shows that this method is correct

    5 、研究了用方向加速法來進行結構可靠指標的計算方法，該法可以避免對功能函數進行導數計算，並已算例說明該方法的正確性。
  11. In this dissertation, the economic value added ( eva ) measure and the integrated multi - index evaluation method are adopted to evaluate firm performance ; the index method data envelopment analysis method and stochastic frontier production function method are used to analyze the firm productivity and efficiency ; the relation of performance and efficiency is discussed, the following viewpoint is stressed : only good performance supported by high efficiency could have solid foundation and be sustained ; the empirical study on public firms of electronic industry is conducted ; at last, the stock price of public firms in electronic industry and the bubble of chinese stock market are analyzed which are based on the fundamental aspect

    績效和效率並不總是同方向變化。本文採用經濟增加值（ eva ）方法和多指標綜合評估方法評估企業績效；使用指數方法、數據包絡分析（ dea ）方法和隨機前沿（ sf ）生產函數方法分析企業生產率和效率；論述了績效和效率的關系，認為好的績效只有用高效率支撐才具有穩固的基礎和可持續性；以電子行業上市公司為例做了實證研究；最後進行了基於上市公司基本面的電子行業股價和中國證券市場泡沫分析。
  12. Based on the previous and through the uniaxial tension damage experiment and comparing to the uniaxial compression damage experiment, the paper makes research on the anisotropism of the damage and the difference of the damage between the uniaxial tension and the uniaxial compression, combining with orthogonal anistropic damage model and exponent function damage developing equation. through the formulae deduction, the damages caused by the same absolute value tension and compression strain have the comparing character in some extent and corresponding decay coefficient

    本文在前人研究的基礎上，通過單軸拉伸損傷試驗，及其與單軸壓縮損傷試驗的比較，進一步結合正交異性損傷模型與指數函數損傷演變方程，對混凝土體中損傷的各向異性以及單軸拉伸和單軸壓縮情況下損傷的差異性進行了研究探討，經過公式推導，提出絕對值相等的拉、壓應變產生的損傷具有一定的可比性，並給出了進行可比性換算的折減系數。
  13. Chapter 2 different to the stability of the 1 chapter, we studied the stability of ? gain stability. we have known that though the system have lyapnov stability it may be not have ? gain stability. it is necessary to discuss the ? gain stability. chapter 3 we discuss the exponential stability of a new hopfield neural network : bam neural network

    第三章，利用dini導數、不等式以及lyapunov函數方法等工具對當今研究的一類熱點神經網路， （ bam ）雙向關聯的神經網路的指數漸近穩定性作了研究，得到了其指數漸近穩定的條件
  14. Based on image sparse representation, researched the background, development and non - linear approximation of the multiscale geometric analysis, and respectively analyzed the advantages and disadvantages. finally, pointed out the developing direction

    摘要以函數的稀疏表示為主線，詳細介紹了各種多尺度幾何分析產生的背景、發展歷程和逼近性能，並分析了它們各自存在的優缺點，最後指出了其發展方向。
  15. Correlative function method and variable function method are used to calculate the relevant range of soil layer. the limit capacity of bored pile is determined by the cone penetration tests ( cpt ) and the static loading tests and related statistics parameters are also evaluated. considering the effects of group piles, the action effect is calculated by the settlement of pile foundation and the reliability index of single pile as well as group piles is determined by monte - carlo method

    本文選擇臨近場地的四座高層建築地基的全部勘測資料，以沿深度方向的一維平穩高斯隨機場作為樁基土層土性參數的數學模型，利用相關函數法和變異函數法計算土層的相關范圍，由cpt和靜載試驗結果綜合確定鉆孔灌注樁的極限承載力，進而對相同場地各試樁的承載力進行折算后檢驗其概率分佈，並估計有關統計參數：考慮群樁效應確定樁基承載力，由樁基沉降反算其作用效應，由monte - carlo方法計算單樁及群樁的可靠指標。
  16. Using the indices of trajectory follow error and steering busyness in evaluation of the steering stability, a quadratic form performance index function for the neuron learning was established and the tuning of the connection weight values of the single neuron controller was realized using the algorithm of gradient descent

    利用操縱穩定性評價中的軌跡跟隨誤差和方向盤忙碌程度的評價指標，建立了神經元學習的二次型性能指標函數，並採用梯度下降演算法實現了單神經元控制器的滾接權值的調整。
  17. First, robust eigenstructure assignment, eigenstructure assignment is an effective method for output decoupling of mimo system. here, we first design an objective function in term of desired location of close - loop eigensvalues, achievable structure of close - loop eigenvectors and the unstructured time - varying parameter perturbations in system matrix

    特徵結構配置對于mimo系統的解耦控制是一種很有效的方法，本文提出的演算法是：設計一個性能指標函數，綜合考慮特徵向量的接近程度，未被配置的特徵值的穩定性及系統的非結構型擾動。
  18. The main research of this paper includes four parts : a. analyzing the sampling methods for testing the large - scale corpus segmentation and using isodata clustering method to sort the corpus ; b. presenting the mode configuration of corpus ; c. analyzing the measurement formula for the similarity of samples, and adopting a new measurement formula, in which the distance of the sample vector and the linear correlation between the components of the sample vector are taken into consideration comprehensively ; d. presenting evaluation function of the result

    研究聚類中的樣本相似性度量公式，採用改進的絕對值法計算。該公式既能反映樣本向量間的距離，又能反應樣本向量各分量之間的相關性； d給出聚類結果的評價函數，根據該評價函數可以實現對聚類參數的有益指導，在聚類結束時還可根據評價函數值直接求得聚類所帶來的增益。
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