未知項 的英文怎麼說

中文拼音 [wèizhīxiàng]
未知項 英文
unknown term
  • 未 : Ⅰ副詞1 （沒） did not; have not 2 （不） not Ⅱ名詞1 （地支的第八位） the eighth of the twelve ear...
  • 知 : Ⅰ動詞1 （知道） know; realize; be aware of 2 （使知道） inform; notify; tell 3 （舊指主管） admin...
  • 項 : Ⅰ名詞1 （頸的後部） nape （of the neck） 2 （款項） sum （of money） 3 [數學] （不用加、減號連接...
  • 未知 : unknown
  1. According to the geometry of slope measurements for the subjective wavefront optometer, a wavefont reconstruction model using zernike polynomial with normalization factor is put forward. based on householder transformation and gram - schmidt orthogonalization method, two methods for working out unknown zernike coefficients are bring forward. the error propagation parameter for the wavefront reconstruction model is deduced

    深入研究了帶標準化因子的zernike多項式的性質;針對主觀式像差儀波前斜率采樣方案，提出了採用帶標準化因子的zernike多項式對眼測試波前進行重建的數學模型;提出了兩種求解方法，即基於householder變換求解法和基於gram - schmidt正交化求解法，用於確定重建模型中的未知模式系數;推導出了該波前重建模型對斜率測量誤差的傳遞系數。
  2. Data mining is an important research subject in the field of information technology. it means a process of nontrivial extraction of implicit, previously unknown and potentially useful information from data in databases or datawarehouses. it involves such subject areas as database, artificial intelligence, machine learning and statistics. classification analysis is an important data mining problem

    數據挖掘（ datamining ）是信息處理技術研究領域的一項重要課題。它是指從大型數據庫或數據倉庫中提取隱含的、未知的、非平凡的以及有潛在應用價值的信息或模式的過程。
  3. On account of the uncertainty existing in the nonlinear ship responded model, we design a dynamic adaptive ship steering controller by using adaptive backstepping. after deducing the update law of the unknown constant, we choose the controller gains to guarantee the closed loop system and the control signal global boundedness

    由於船舶非線性響應模型中含有未知常參數的不確定項，因此採用自適應backstepping的方法，選擇參數自適應調節律，設計動態的船舶航向控制器，實現在線控制。
  4. 2. nonlinear source term identification problem about a quasilinear parabolic heat equation is investigated. for the given function determined, the existence and the uniqueness of the solution of the state equation are proved and the dependence of the solution of the state equation on the identification parameter is discussed ; then the identifiability is verified ; through choosing suitable basic functions, the above identification problem can be transformed into a constant coefficients identification problem ; and an practical iterative algorithm for solving the identification problem is presented, the feasibility and validity of the algorithm is verified by the numerical experiments

    2 、研究一擬線性拋物型熱傳導方程非線性未知源項的識別問題；對于給定識別函數，論證了狀態方程解的存在惟一性、方程解與識別函數的依賴關系和可識別性；通過選取適當的基函數，把對非線性源項的識別轉化成常系數識別問題；給出了實現非線性源項識別的迭代演算法，通過數值實驗證明了演算法的有效性。
  5. In this thesis, based on item response theory, a number of ways to estimate the latent trait and item parameters were introduced and their advantages and disadvantages were analyzed ; what is more, empirical logistic regression and two parameters logistic model ( 2plm ) are combined to set up a linear model by logit - mapping and a new parameter - estimation method is proposed

    新方法將經驗logistic回歸用於兩參數logistic模型的參數估計，使用logit變換建立線性模型，利用線性模型的最小二乘估計得到第j個項目的項目參數向量_ j = （ _ j ， _ j ）的兩步估計由於x _ j含有未知的討厭參數，的理論值也和有關，我們結合上式的結果對進行再估計。
  6. He clears up the philosophical basis of the methodology of subjective design through the discussion of the theory of human ' s ignorance and points out that in facing the infiniteness and the complicated situations of the world, since human beings cannot forecast the future tendency of all things, the only reliable way the subjects should adopt is to remain the utmost opportunity for the unknown things. to ensure the normal development of the society, the subjects should insist upon the evolution of routine culture, that is, the natural evolutional laws of restraining the human ' s behavior such as traditional convention, practice and customs

    他通過對人的「無知」觀理論論證來消解了主觀設計的方法論所依憑的哲學基礎，提出主體在面對「無限」 ，處理世界事項的復雜情形時，因為人不可能預知一切事項的未來情勢，因而唯一正確的可靠辦法就是為一切未知之事項保留可能的機會，要確保社會事項的正確前進，唯一可循的就是堅持「規則的文化進化」即那些制約著人的行為的規則? ?傳統的習慣、慣行、風俗等的自然衍進法則。
  7. We should make a direct survey of the problem to be solved, disregarding the fact that some of its terms are known and others unknown, and intuiting, through a train of sound reasoning, the dependence of one term on another

    應該直接通觀所提困難，撇開有些項已知、有些項未知不管，用若干次真正通觀去察看它們是怎樣互相依存的。
  8. Firstly, based on backstepping and the supervisory control strategy, a robust adaptive fuzzy controller is designed for a class of nonlinear systems. the first type fuzzy logic system is used to approximate the unknown part of the process. the adaptive compensation term of the optimal approximation error is adopted

    本文首先針對一類不確定非線性系統，基於backstepping方法，利用監督控制，引入最優逼近誤差的自適應補償項，並利用型模糊邏輯系統逼近系統的未知部分，提出了一種魯棒自適應模糊控制器設計方案，運用李亞普諾夫第二方法，先證明了閉環模糊控制系統全狀態有界，再證明了跟蹤誤差收斂到零。
  9. The interesting thing is that there have no random parts and no unknown constants in these bounds

    有意義的是，這些界中均不含有隨機項和任何未知參數
  10. In the paper the local polynomial method which is contained the local modelling approach is employed to estimate the unknown functions

    本論文使用局部光滑方法中的局部多項式方法給出未知函數的估計。
  11. Actually, n - s equation has three unknown functions u, v, p and three equations, now prandtl boundary layer equation has two unknown functions w, vand two equations only, and viscosity terms has partly reduced

    原來有三個未知函u ， v ， p及三個方程，現在只有兩個未知函數u ， v及兩個方程，且粘性項也少了一些，這些都是簡化的地方。
  12. Setting all three options to 0 is acceptable ; it can be treated as an unknown state so there are four possible states : file, directory, special, and unknown

    將所有這三個選項設置為0是可行的；可以將它視為一個未知狀態（於是有四種可能的狀態：文件、目錄、特殊和未知） 。
  13. Represents an item whose team foundation source control state is unknown. checked in

    表示其team foundation源代碼管理狀態未知的項。
  14. One of the important prerequisites for nn to approximate the nonlinear function f ( x ) is the states x of the system should be in a compact set. therefore, the unkown unlinear systems can be expressed by nn and a model error e ( x ), and there exists a positive constant 6 such that e ( x ) < 8. so the problem can be incorporated into robust adaptive control

    神經網路可以逼近非線性函數f （ x ）的一個重要前提是x必須落入某一緊集s中，因此在一緊集u上，未知的非線性系統就可以用神經網路及一建模誤差項（ x ）表示出來，且存在一正的常數，使得（ x ） ，從而這一問題可以歸結到魯棒自適應控制中。
  15. Method if the operation encounters an unknown character or surrogate pair in the input

    如果編碼操作在輸入中遇到未知字元或代理項對，則該操作將調用
  16. On the basis of investigation and synthesis of the relative theory and key technology on the topological structure of locomotion, control system architecture, maneuverability, trafficability, the integration of exact mechanical engineering, net - based communication and sensor technology, an innovative robot with reconfiguration and biomimetic characteristics has been developed for 863 program of china ? study on autonomous navigation system for intelligence mobile robot in unknown environment

    本文針對「未知環境中自主工作智能移動機器人導航系統研究」的國家863項目，在綜述國內外關于移動機器人走行部拓撲結構、控制體系、機動性和通過性等移動機器人的相關理論和關鍵技術的基礎上，綜合利用精密機械、網路通信、傳感技術等學科的技術，研製開發出一種多機動模式可重構移動機器人。
  17. Supported by the national natural science foundation of china ( nsfc ) 2, the research topic of this paper has been focused on reinforcement learning and its applications in mobile robot navigation. one part of the main contents in this paper is the generalization methods for reinforcement learning in solving markov decision problems with continuous states and actions. another part of the main contents is the applications of reinforcement learning methods in the optimization of the path tracking controllers and the autonomous navigation controllers for mobile robots

    本文在國家自然科學基金項目「增強學習泛化方法研究及其在移動機器人導航中的應用」的資助下，以增強學習及其在移動機器人導航控制中的應用為研究內容，重點研究了增強學習在求解連續狀態和行為空間markov決策問題時的泛化（ generalization ）方法，並針對移動機器人在未知環境中的自主導航和路徑跟蹤控制器的優化設計問題，研究了增強學習在上述領域中的應用。
  18. Unknown displacement jumps in the equations are approximated with the products of the fundamental density functions and polynomials, in which the fundamental density functions are expressed with exact solutions of the two - dimensional interface cracks due to axial - symmetries of the problems herein

    方程中的未知位移間斷近似表示為基本密度函數與多項式之積，其中基本密度函數考慮到問題的對稱性用二維界面裂紋精確解表示。
  19. This is a work of utmost importance in that it lays the foundations of logic into mathematics and enables us to use this as a tool to explore the unknown

    這項工程至關重要，它奠定了將邏輯引入數學的基石，令後人得以藉此途徑探索未知世界。
  20. Rule nineteen - using this method of reasoning, we must try to find as many magnitudes, expressed in two different ways, as there are unknown terms, which we treat as known in order to work out the problem in the direct way

    在使用推理的方法時，應該以兩種不同的方法，嘗試發現相同多的數量，如果有未知項的話，我們可以設想為已知項，以便以直接的方式來解決問題。
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