水力幾何學 的英文怎麼說

中文拼音 [shuǐlìjīhéxué]
水力幾何學 英文
hydraulic geometry
  • 水 : 名詞1 （由兩個氫原子和一個氧原子結合而成的液體） water 2 （河流） river 3 （指江、河、湖、海、洋...
  • 力 : Ⅰ名1 （力量; 能力） power; strength; ability; capacity 2 [物理學] （改變物體運動狀態的作用） forc...
  • 幾 : 幾代詞1. （多少, 用於詢問數量和時間） how many 2. （表示不定的少數目） a few; several; some
  • 學 : Ⅰ動詞1 （學習） study; learn 2 （模仿） imitate; mimic Ⅱ名詞1 （學問） learning; knowledge 2 （學...
  • 水力 : waterpower; hydraulic power水力剝離 [采礦工程] hydraulic stripping; strip with water; 水力采礦 hy...
  1. Many planets ( for example, ganymede, mercury, the earth, jupiter and saturn ) and stars ( for example, the sun ) possess intrinsic magnetic fields. the explanation for their existence and variation remains a great challenge to planetary scientists and astrophysicists. this article attempts to review some recent developments and difficulties in the study of magnetohydrodynamics for the electrically conducting fluid interiors of planets and stars. it is the fluid motions, usually driven by thermal convection, that generate and sustain magnetic fields through magnetohydrodynamic processes in planets and stars. in planets, the magnetohydrodynamic processes are strongly affected by the combined and inseparable effects of rotation, magnetic fields and spherical geometry. the key dynamics involves the interaction between the coriolis and lorentz forces. in the sun, it is the solar tachocline, a thin shear flow layer located at the base of the convection envelope, that plays an essential role in the solar magnetohydrodynamic processes which produce the 11 - year sunspot cycle. some results of a new nonlinear three - dimensional solar dynamo model are also presented

    許多行星（如木衛三，水星，地球，木星和土星）和恆星（如太陽）具有內部磁場.對這些磁場的存在和變化的解釋對行星科學家和天體物理學家是一個巨大的挑戰.本文試圖總結行星和恆星的導電流體內部磁流體力學研究的新近發展和困難.一般由熱對流驅動的流動通過磁流體力學過程產生並維持在行星和恆星中的磁場.在行星中磁流體力學過程強烈地受到轉動，磁場和球幾何位型的綜合影響.其動力學的關鍵方面涉及科里奧利力和洛倫茲力間的相互作用.在太陽中其流線，即處于對流層的薄的剪切流層在太陽的磁流體力學過程中扮演了一個基本的角色，並由之產生了11年的太陽黑子周期.本文也給出了一個新的非線性三維太陽發電機模型
  2. Mainly by using the historically comparative experience method, and in view of chinese linguistics and certain relevant theories like bruners structuralism and modern cognitive theories, and yet on the basis of elaborating on discipline structure of teaching chinese literacy in the primary school and the characteristics of child ' s cognitive development, this thesis reflects upon the practice of teaching chinese literacy in china ' s primary school and emphasizes the importance of good resolutions of the following issues : the relation between chinese literacy teaching and chinese teaching system ; the stages of chinese literacy acquisition and the multiplicity of the approaches to such acquisition ; the issue of chinese phonetic alphabet as the instrument of chinese literacy acquisition or as its goal ; major device and auxiliary devices for the development of chinese literacy, etc. and finally by addressing the essential frameworks of the new curriculum standards, the ultimate aim of chinese literacy teaching as well as the striving direction for china ' s chinese teaching reform is defined as " teaching aims at self - teaching "

    在對我國小學語文識字教學歷史經驗進行回顧的基礎上，分析其中的合理性與局限性，找出問題的癥結所在，探索如何將漢字構字規律與學生的認知規律有機結合起來，提高識字教學水平，是本文的主要研究目的。本研究主要運用歷史經驗比較法，借鑒漢語言文字學、布魯納的結構主義和現代認知心理學的有關理論，在論述我國小學語文識字教學的學科結構和兒童的認知特點的基礎上，反思我國小學語文漢字教學的實踐，提出識字教學必須處理好幾對矛盾：識字教學與小學語文教學體系、識字的階段性與識字方法的多樣性、拼音是識字教學的手段還是目的、識字的主要方法與次要方法等，結合新課程標準的基本精神，提出「教是為了不教」是識字教學的最終目標，也是我國小學語文教學改革的努力方向。
  3. This provides an extremely lightweight and strong racing machine, where the geometry of the frame is tailored by working the tube sets to create the perfect ride. at hang lun we take the design, fabrication, and material selection process very seriously, creating the best product possible for the intended application ; making bikes go fast

    為了使車架的設計更加完美並滿足輕量化幾何學結構空氣動力學的要求，管材的加工採用專用的設備保證其精密的尺寸，管形被設計加工成橢圓水滴錐管垂直橢圓等各種形狀，再經過工藝要求很高的氬弧焊接和外表面的手工打磨處理。
  4. On the basis of existing studies in the field of seepage of rock mass both at home and abroad, the present dissertation has conducted a broad study in terms of hydraulic and geometric parameters, computing model, basic seepage law, fracture drainage, rockmass " unloading mechanics and its relations with seepage. the paper is written by employing such methods as field observation, model test, theory research and numerical analysis. the main research payoffs are as follows

    本文在充分認識了國內外巖體滲流研究的發展及研究現狀的基礎上，結合現場觀測、模型試驗、理論研究及數值分析等多種方法，對裂隙巖體的水力幾何參數、計算模型、基本滲流規律、裂隙排水、巖體卸荷力學及其與滲流的相互作用等多方面進行了研究，取得了如下一些主要成果。
  5. The subsystem is integrated in the cad system of catia, and applies kinematics 3d - manikin and mechanics 3d - manikin in different phase of aircraft cockpit design, and acquires perfect kinematics and mechanics results of pilot. the subsystem whose interface is friendly and utilization is directly, enriches the methods by which the designer estimates an aircraft cockpit design, and enhances the design efficiency and precision

    該子系統集成在catia系統中，在飛機座艙設計的各個階段分別引入了飛行員三維人體幾何模型和運動學模型，通過模擬飛行員的操作動作與計算視角、可達性、操縱力等參數，較好的反映了飛行員的運動學和動力學特徵；界面友好，操作直觀、簡便；豐富了設計人員對飛機座艙設計評估手段，保證了設計效率和精度；有利於飛機座艙設計水平的提高。
  6. In practical projects, the boundary shape irregularity of the lake, reservoir, river and estuary area and the non - linear character of hydrodynamic equation make it difficult to get the theoretical solution of the equation, so the numerical solution has to be the only a choice

    由於實際工程中湖泊、水庫、河流、河口區域邊界幾何形狀的不規則，以及水動力學方程的非線性性質，使得理論分析解難以作出，只能求助於數值解。
  7. Incorporating the non uniform rational b spline ( nurbs ) which is the only definition of the form of industry products, the author selects the method of b spline to do the numerical computation research work of the hydrodynamics of three dimensional ship hull based on the reading and analysis of the documents about hydrodynamics, especially the interaction hydrodynamics

    作者在對與船體水動力尤其是干擾水動力的研究相關的文獻的閱讀與分析的基礎上，結合作為定義工業產品幾何形狀的唯一數學描述的非均勻有理b樣條方法，選擇b樣條（統一成非均勻有理b樣條形式）來進行有關三維船體水動力的數值計算研究工作。
  8. But, though considerable process has been made in the last ten years, digital watermarking is still in its infancy, and much interesting work remains to be done this thesis addresses some problems in the gray - scale image digital watermarking that are summarized below : 1 ) whereas the basic theory of digital watermarking is still very poor, a digital watermarking mathematic model based on imperceptibility and robustness is presented by analysising the characteristic of digital watermarking ; 2 ) based on the model constructed above, by defining the measures of capacity and robustness of digital watermarking, an objective method for evaluating the digital watermarking is introduced and used to analysis some algorithms ; 3 ) whereas geometric distortion always influences the restoration of watermark, we advocate to enhance the robustness against geometric distortion by restoring the image which has been distorted by geometric transformation, and a method is designed for estimating the parameters of geometric transformation ; 4 ) based on the conclusion discussed above, and combined with the masking effects of hvs, a novel public meaningful gray - scale image digital watermarking is designed by analysising the characteristics of image gray - scale interpolation and haar wavelet transformation. the experimental results show that the method is indeed powerful ; 5 ) whereas many image digital watermarking schemes, which embed watermark by modifying the values of pixels in spatial domain and transformed domain, are confronted with the conflict between the imperceptibility and robustness, we advocated to use some stable digital characteristics of host image as watermark and a algorithm based on hermite matrix is designed

    本文重點對灰度圖象數字水印技術進行研究，主要工作如下： 1 ）鑒于目前數字水印的理論研究比較薄弱的現狀，本文通過分析數字水印的特點，建立了一個數字水印的數學模型，為進一步研究數字水印打下了基礎； 2 ）根據以上建立的模型，通過引入容量和穩健度的概念為數字水印提供了一個客觀評價方法，並對一些數字水印演算法進行了分析； 3 ）為增強數字水印抵抗幾何攻擊的能力，研究了受幾何攻擊的圖象的復原問題，並給出了一個計算圖象幾何變換參數的方法； 4 ）通過分析圖象灰度插值演算法和haar小波變換的特點，結合hvs的掩蔽效應，設計了一個公開的有意義數字水印演算法，實驗結果表明本演算法具有較強的穩健性； 5 ）目前許多水印演算法都是通過在空域或頻域修改象素值的方法嵌入水印的，這種方法面臨著透明性和穩健性的矛盾，為解決這個矛盾，本文提出以圖象的某些穩定的數字特徵為水印的觀點，並結合hermite矩陣的特點設計了相應的水印演算法，實驗結果表明該演算法具有較好的穩健性。
  9. In this article, the following technology of the carbon fiber composite flywheel in the integrated energy - storage / attitude - control system are analyzed and the valuable achievements are achieved above the foundation of consulting a large quantity of literatures and investigation : 1. different technology method for carbon fiber composite flywheel are designed, aimed at the character of carbon fiber composite material and manufacture 2analyzes the stress of carbon fiber composite flywheels made by different technology method, hoop - winding method, symmetric ortho layers pressing method, multi - layer winding method and interference joining method, under high rotate speed, builds their static model ; and simulates their technology and shape parameter ' s affecting their stress level with i - deas f. e. m

    本文在查閱了大量國內外相關文獻及調研的基礎上，針對集成化儲能/姿態控制飛輪系統中的碳纖維復合飛輪的以下相關技術進行了研究，並取得了有價值的成果： 1針對碳纖維復合材料的特點及加工方式，設計了周向纏繞成型法、對稱正交鋪層層壓法、多層結構纏繞及過盈連接法等不同工藝方式的碳纖維復合飛輪轉子； 2針對不同工藝方式的碳纖維復合飛輪轉子，進行了高速旋轉狀態下的應力分析，建立了靜力學解析模型，並結合i - deas有限元分析軟體模擬模擬了不同工藝方式的碳纖維復合飛輪轉子的相關幾何參數及工藝參數對其應力水平的影響； 3
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