problem of dimension 中文意思是什麼

problem of dimension 解釋
維數問題
  • problem : n. 1. 問題，課題；疑難問題；令人困惑的情況。2. 【數、物】習題；作圖題。3. （象棋的）布局問題。adj. 1. 成問題的；難處理的。2. 關于社會問題的。
  • of : OF ＝Old French 古法語。
  • dimension : n 1 尺寸。2 【數學】次元，度（數），維（數）。3 【物理學】因次，量網。4 〈pl 〉容積；面積；大小，...
  1. In this dissertation, through computer simulation, the problems of modeling, control and guidance of auvs are presented. the first part of this dissertation addresses the problem of dynamically modeling of auvs, and derives thrusters " two - dimension nonlinear dynamic model, which has axial flow speed and propeller rotational velocity as two state variables, voltage or current of motor as inputs, and thruster force and torque as output. the second part focuses on the nonlinear adaptive sliding mode control of auvs in diving plane and steering plane

    本論文系統研究了自主式水下航行器的建模、非線性自適應滑模控制、以及深度調整和水平面導引方法等問題，具體成果和創新點如下1 、根據流體力學理論，建立了螺旋槳推進器的動態模型，它以螺旋槳來流速度v _ p和螺旋槳轉速n為狀態變量，以電機施加轉矩為輸入，螺旋槳推力t和轉矩q為輸出。
  2. In this paper, a genetic algorithm was presented to solve the problem of the searching of the optimal coalition structure. we designd one - dimension chromosome coding structure and the corresponding improved uniformity crossover operator and the heuristic mutation operator

    我們給出了一種求解最佳聯盟結構的gas演算法，設計出了一種簡單的一維自然數染色體編碼結構和改進的均勻交叉運算元以及啟發式變異運算元。
  3. It builds a physical model according to hoisting capacity, lifting angle and structural stabiliy, theory, solves the problem of function relationships among lifting capacity, lifting angle, boom weight, boom dimension and deduces the natural boundary condition of design parameters, providing a new way to determine crane design parameters

    摘要將起重量和起吊幅度為基本設計依據，以壓桿穩定理論為分析基礎，結合專業知識，建立物理模型，解決了起重量、起吊幅度與吊臂質量、吊臂主要參數之間的函數關系的難題，首次確定出設計參數的自然邊界條件，為起重機設計者提供了確定設計參數的新方法和科學依據，具有開創意義。
  4. 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。
  5. In order to find the detecting signal characteristics of all kinds of flaws for ect and ac - mfl, itestablished the signal analysis method based on rectangular flaw, which was validated throughthe experimental research on ect and the emulational research on ac - mfl for different shapeand dimension flaws. the method was explained that a flaw with an arbitrary shape can berepresented as a set of flaws with the simplest rectangular shape. as the synthetic application of these researches, the problem of defect detection of bolt wasresearched

    為實現螺紋區域中的缺陷檢測，提出了提取局部極大值的缺陷識別方法;並根據位置的不同將缺陷分為螺桿結合部缺陷、螺紋區域缺陷以及螺紋尾部缺陷三類，對每類缺陷的信號特點進行了分析，給出了缺陷檢測的判據，並通過實驗驗證了識別方法的可靠性;最後對螺栓頭桿結合部的缺陷檢測進行了實驗研究，並根據信號特點建立了相應的缺陷檢測方法。
  6. Being local in space and frequency, and some even compactly supported, wavelets are used to simplify the wave equations in slowly varying nonhomogeneous medium, and transfer the problem of solving two - dimension wave equations into a series of one - dimension problems, after words, the method in 1 can be applied to solve it. as a result, the complexity of the problem and the difficulty in solving it are largely reduced

    利用小波變換在空間域和頻率域上具有局部性的特點，通過小波展開，把二維非均勻問題轉化為一系列一維非均勻問題，然後利用在（一）中得到的通用計算公式求解，大大降低了問題的復雜性和難度。
  7. Through discuss the dimension notion and the the basic theories of dimensional analysis, use the example explained the dimensional analysis in the electromagne theory, and point out the dimensional theory analyse concrete problem to needs the problem of the consideration

    摘要通過對量綱概念及量綱分析基本理論的分析討論，用實例解釋了量綱分析在電磁理論中的應用，並指出應用量綱理論分析具體問題時需考慮的因素。
  8. To conquer the problem of acquisition high effectiveness in analog circuit fault imformation, wavelet transform was researched in this paper to preprocess the fault signals. meanwhile, bp neural network diagnosis method based on wavelet transformation was proposed, this method can abstract fault feature effectively and decreases the dimension of imput vector. by this mean, the construct of neural network can be simplified and training time was economized, then the recognize ability of fault type was improved also

    為解決模擬電路的故障信息高效獲取難題，本文採用小波變換作為故障信號的預處理器，研究了基於小波變換預處理的bp網路故障診斷方法，該法能在有效提取故障特徵的同時，降低輸入信息的維數，從而進一步簡化了神經網路的結構，減少了其訓練時間，提高了辨識故障類別的能力。
  9. The theories of multi member function ' s extremity value, hooke jeeves mode searching method solving wholly complex problem of extremity value and uniformity design method, one new and efficient method to choose test point, are applied to establish the two - dimension oil well orbit optimized model. the shortest length of oil well orbit curve is regarded as this model ' s object and all kinds of effecting parameters are analyzed

    通過引入多元函數極值理論、求解復雜極值問題的hookejeeves模式搜索法及一種較為新穎和高效的試驗點選擇方法：均勻設計法，建立以最短油井軌跡曲線長為目標的二維油井軌道優化設計模型，並對影響井軌跡曲線的參數進行了較為詳細的分析。
  10. In order to solve the problem of choice parameter on model, model parameter inverse analysis are discussed in this paper, they include one dimension river flow roughness parameter, tow dimension flow roughness parameter and side flow of one dimension river flow

    針對模型運行中遇到的參數確定問題，本文討論了模型參數反分析，包括一維河道糙率反分析，二維糙率反分析，一維河道旁側入流反分析等。
  11. The form solution to the mixed problem of one dimension inhomogeneous diffusion equation was given through the method of undetermined function

    摘要利用待定函數法給出了一維非齊次擴散方程混合問題的形式解。
  12. 3. feature extraction of time series based on chaos theory is explored, which include the problem of temporal correlation in correlation dimension method, the robust method to evaluate the maximum lyapunov exponents, the extraction of generalised dimensions and the evaluation of h2 entropy of time series

    研究了時間序列的混沌特徵參數提取方法。包括關聯維數演算法中的時間相關、最大lyapunov指數的穩健估計演算法以及廣義維數和時間序列熵h _ 2的估計問題。
  13. Aiming at the problem of angle motion estimation in monopulse three - dimension imaging, a novel angle motion parameters estimation method based on the inverse synthetic aperture radar imaging for difference beam is presented

    摘要針對單脈沖三維成像時的目標角運動估計問題，提出一種基於差波束逆合成孔徑雷達成像的新的角運動參數估計方法。
  14. The iterative algorithm for calculating the monin - obukhov length in the aerodynamic method is transformed into the problem of finding the fixed points of a one - dimension mapping in nonlinear theory

    將空氣動力學方法迭代求解monin - obukhov m - o長度的過程，轉化為非線性理論中求解映射不動點的問題，獲得穩定近地面層m - o長度的解析解。
  15. Following works has been done : ( 1 ) for the coordination problem of two nodes in supply chain between one manufacturer and one retailer, it hereby make improvement based on the concerned literature research : to relax a certain tentative terms ; to discuss the change of each node benefit and supply chain total benefit in every policies under un - fixed price flexibility coefficient and to make three - dimension for analysis

    作出了以下幾個方面的工作: （ 1 ）對於一個生產商和一個零售商的兩節點供應鏈的協調問題，主要在相關文獻研究的基礎上作出了改進:放開了某個假設條件;在非固定的價格彈性系數下來討論每種策略中各節點利潤和供應鏈總利潤的變動，並作出三維圖形進行分析。
  16. Firstly, this paper summarizes modern weaponry stealth technology at home and abroad, and lays special emphasis on analyzing stealth problem of cruise missile ’ s guidance head cover, aerocraft radar canopy and other privileged sites. secondly it makes a research on related theories of transparent metallic mesh that applied to missile ’ s guidance head cover and aerocraft radar canopy, and deduces relational expression between transparent metallic mesh structural parameters and radar wave - shielding efficiency, infrared transmitting. we use laser direct writing technique to fabricate a metallic mesh ( dimension : 70mm 70mm ; line width : 5 m ; period : 350 m ) on glass surface, then do experiment to test radar wave - shielding of metallic mesh via radar transmitting and receiving device

    本文首先綜述了國內外現代武器系統隱身技術方法;重點對巡航導彈導引頭罩和飛機雷達艙罩等特殊部位的隱身問題進行了研究，研究了金屬網柵用於導彈頭罩和飛機雷達艙罩隱身的相關理論，推導了金屬網柵結構參數對雷達波屏蔽效率和透紅外關系式;用激光直寫工藝，在玻璃表面上製作了一塊面積為70mm 70mm ，線寬為5 m ，線周期為350 m的金屬網柵;在實驗室里用雷達發射和接收裝置測試了網柵對雷達波的屏蔽實驗;認為利用金屬網柵技術對雷達波具有一定的屏蔽作用，而且不影響精確制導的紅外線高效透過。
  17. This paper emphatically researched the problem how to calculate the intersection point between workpiece that rotated with variational angle velocity and milling cutter that moved with complicated track and rotated with high speed. furthermore it adopted the discrete curve surface method for every milling cutter, and treated image frame as the control parameter of position of milling cutter during the intersection calculation process, so the algorithm of intersection between workpiece and milling cutter was obtained. the paper also discussed further three - dimension graphic problem of manufacture process

    文中對做變角速度運動的工件和運動軌跡復雜的高速自轉中的銑刀求交問題進行了重點研究，採用將銑刀上的每個刀尖劃出的曲面離散化的方法，以圖像顯示的幀數作為求交計算過程的銑刀位置的控制參量，得出了銑刀與工件的求交演算法。
  18. This paper brings forward a stable inverted deduce method which point by point in fix layer, for a class of dimension elastic wave problem, and proves that the result of parameter has whole precision for this method, numercal test shows this method is effective and feasible. 1fig., 1tab., 7refs

    針對一類一維彈性波反演問題，導出了一種穩定的定層逐點反演方法，推證了該方法的參數解具有整體二階精度，數值試驗表明，該方法是有效而可行的.圖1 ，表1 ，參7
  19. Thirdly, a modified extended chirp scaling ( ecs ) algorithm is presented, which solves the problem of producding fine focused images in the class of chirp scaling ( cs ) algorithm. lt can be used for uwb - sar imaging effectively. the phas e error produced by cs operation are analyzed. a windowed process in two dimension frequency domain before cs operation are proposed. it can improve the quality of image and widen the effectively swath and increase the peak to sidelobe ratio ( pslr )

    然後針對chirpscaling （ cs ）類演算法不能對參考點精確聚焦的問題，提出了一種改進的擴展cs （ ecs ）演算法，實現了對uwb - sar的高效成像；分析了cs操作產生的相位誤差，提出在cs操作之前在二維頻率域對信號加窗，除有效提高信號的峰值旁瓣比（ pslr ）外，還可以提高圖像質量，增加有效測繪帶寬度。
  20. Following an iterative reduced - dimensional strategy, the problem of " dimension curse " can be solved effectively. in the last section of this chapter, a cascade wavelet model, which is combined with a static wavelet submodel and a dynamic linear submodel, is presented to identify the dynamic nonlinear systems

    最後，提出一種串聯小波模型，將現有的靜態小波模型與動態線性子模型串聯，可以很好地辨識非線性動態系統，而且避免了動態神經網路中非線性與記憶混合的復雜性。
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