virtual mass 中文意思是什麼

virtual mass 解釋
實效重心
  • virtual : adj. 1. 實際上的，實質上的，事實上的。2. 【物理學】虛像的。3. 【物理學】有效的；【計算機】（網上）虛擬的。4. 〈古語〉具有可產生某種效果之內在力的。
  • mass : n 彌撒；彌撒的儀式[禱告、音樂]；彌撒曲。 a high [solemn] Mass （有燒香、奏樂等的）大彌撒。 a low ...
  1. This dissertation studies the problem of dynamics modeling, dynamical response, and distribution of moving mass for a re - entry vehicle ( mmcrv ) under the background of national natural science fund project “ precision control and guidance for moving mass control of a re - entry vehicle based on the virtual displacement concept ”

    本論文以國家自然科學基金項目「基於虛位移概念的變質心再入飛行器精確制導問題研究」為背景，研究基於變質心控制的再入體動力學建模、動力學響應和落點分佈等問題。
  2. Virtual image mass spectrometer

    虛象質譜計
  3. The finite element analysis of 3d seepage field for surrounding rock mass of cavern groups of underground powerhouses was performed based on the nodal virtual flux method for solving the non - pressure seepage field and the improved drainage substructure technique for accurately simulating the complex seepage behaviors of densely distributed drainage holes, with emphasis placed on the seepage properties of the anti - seepage concrete curtain and drainage curtain in the anti - seepage and drainage system

    摘要在求解無壓滲流場結點虛流量法的基礎上，結合可精細模擬密集排水孔復雜滲流水力行為的改進排水子結構技術，付某地下廠房廠區洞室群圍巖區三維滲流場進行了有限元求解分析，著重研究了防滲排水系統中的帷幕和排水幕的滲流特性。
  4. Firstly, based on the present research all over the world, a 3d quasi - single phase model is built together with k - equations. the special feature of this model is taking account of the influence of interaction between liquid and gas, that is to say, the influence of interphase drag force, lifting force perpendicular to the relative velocity, virtual mass force and gas or liquid volume fraction in the fluid field have been considered. a 3d two - fluid model is also built in order to describe more accurately the fluid flow on distillation trays by comparing the computational results of quasi - single phase mathematical model with of two - fluid mathematical model

    本文在國內外已有的研究基礎上，首先建立了以k - （封閉模型為基礎的三維擬單相流模型，該模型的特點在於充分考慮了氣液兩相間相互作用的影響，即計入了相間曳力、橫向升力、虛擬質量力和氣、液相含率對流場的影響；並建立了塔板三維雙流體模型，主要目的是通過對比擬單相流數學模型、雙流體數學模型的計算結果，建立能夠準確描述塔板上流體流動的數學模型。
  5. According to dynamical characteristic of the bubble motion in the flow field, and under the assumptions of isothermal system without interior heat source, uniform bubble size, and ignoring surface tension, the mathematical expressions for interfacial momentum exchanges have been deduced which include drag, virtual mass force, and lift

    針對氣液泡狀流中氣泡運動力學特性，在系統絕熱、無內熱源、忽略表面張力、氣泡尺寸均一前提下建立了氣液相間曳力、虛質量力、升力的數學模型表達式。
  6. 2. virtual technology in this section, firstly, introduce virtual instrument development and analyze the main principles in tractor testing projects ( including shaft mass, left - and - right side trigging forces, smoke density, noise and velocity ). secondly, propose a general design combined multifunction data acquisition devices ( daq ) with lab view diagram language

    （ 2 ）虛擬儀器技術介紹了虛擬儀器的發展特點，分析了拖拉機主要的檢測項目（軸重、左右制動力、煙度、噪聲、速度）的檢測原理和手段，提出一套基於多功能數據採集卡daq和圖形化編程語言labview的虛擬儀器構建方案。
  7. With vc - 12 virtual concatenation, we can make efficient and flexible use of the bandwidth. sdram, as a mass storage medium, is applied also. in this design, i use hy57v643220ct - 6, with 32bit data width, up to 166m system clock, as the buffer of vc - 12 virtual concatenation alignment and ethernet data transmission

    本論文設計系統中採用了現代的hy57v643220ct - 6作為外部存儲器，它的數據線是32位寬，保證了吞吐量，時鐘可高達166m ，保證了速度，用它實現了多個以太網發送端緩存和多路vc - 12虛級聯的對齊。
  8. A virtual balancing method of a flexible rotor based on rotor dynamic and finite element method is proposed in this paper to decrease the vibrations caused by mass unbalancing

    摘要為了有效地降低回轉機械由於質量不平衡引起的振動故障，基於轉子動力學理論和有限元數值分析方法，進行了柔性轉子系統虛擬動平衡研究。
  9. The ipsa model solves the navier - stokes equations of each phase with the interphase interactions between two phases of water and air, including the interphase drag forces, interphase lift forces, interphase pressure and virtual mass forces

    Ipsa模型對每一相求解n - s方程，並考慮水-氣體兩相間的相間相互作用，包括相間阻力、相間升力、相間壓力和虛質量力。
  10. Principle of minimum virtual mass

    最小虛質量原理
  11. The forces acted on the bubbles are drag, virtual mass, lift, wall lift, pressure gradient, and gravity

    氣泡受力包括相間阻力、虛質量力、升力、壁面升力、壓力梯度和重力等。
  12. In the 1 ight of results, the interphase pressure can be ignored and the interphase lift force plays a trifling role in the friction reduction, while the gravity - buoyancy, the interphase drag force and the virtual mass force are influential, especially in the bigger bubble

    結果表明，相間壓力可以忽略掉，相間升力起的作用比較小，而重力-浮力、相間阻力和虛質量力的影響比較大，特別是在大氣泡中。
  13. The model of fpsa ( inter - phase slip algorithm ) provided in phofvmcs, the software used in computational fluid dynamics, which solves the navier - stokes equations of each phase with the interphase interactions between two phase of water and air, including the interphase drag forces, interphase lift forces, interphase pressure and virtual mass forces, is employed with the difference scheme of upwind and the orthonormal grid

    計算採用由phoenics （計算流體力學軟體）的ipsa （相間滑移演算法）模型，應用upwind （迎風）格式和直角坐標網格。 ipsa模型對每一相求解n - s方程，並考慮水-氣體兩相間的相間互互作用，包括相間阻力、相間升力、相間壓力和虛質量力。
  14. With the advent of mass customization, destinies of manufacturers are directly depended on the designing of their products, design for mass customization ( dfmc ) technologies have been listed the first priority of research focuses. based on the national high tech. research programme ( 863 programme ) - " the research of dfmc for informationalized electrical application ", this paper develops a dfmc system using network virtual reality, discusses human - computer interaction ( hci ) topics including virtual navigation, collision avoidance, target control, dimention dfmc, and appereance dfmc, as well as file interfaces and data extension

    論文依據國家高技術研究發展計劃（ 863計劃） a類項目? ? 「面向信息家電的三維數字化定製設計關鍵技術研究」 ，開發出一套基於網路虛擬現實的定製設計軟體平臺，在此基礎上重點研究了包括虛擬漫遊、碰撞預防、目標控制、尺寸和色彩定製設計在內的人機交互問題，並介紹了系統的文件介面和數據組織。
  15. Under the environment of mass propagation, the current people are easily affected by the " virtual world " made by the media

    摘要大眾傳播環境下，當代人更容易被媒介所製造的「虛性世界」左右，人們對紛繁復雜的世界的了解，更多地依仗傳媒的介紹。
  16. In part, according to the basic principles of structure character, the paper sets up dynamics model of humanoid robot, as a guiding theory of virtual protot - ype research, proposes essential parameter of setting up virtual prototype model, including kinematics parameter, mass property parameter, mechanics character - istic parameter and external parameter, etc ; by utilizing pro / e set up threedimen - sional prototype model, carries on kinematics model prove among adams at the same time, finishes dynamics simulation about virtual prototype walking on line and turning utilizing adams finally

    論文的第三部分根據結構特性建立了仿人機器人動力學數學模型，提出了建立虛擬樣機模型的必要參數，包括運動學參數、質量特性參數、力學特性參數和外界參數等;並利用pro / e建立了三維樣機模型，然後在adams中進行運動學模型驗證;最後在adams中對虛擬樣機模型進行了直線行走過程的動力學模擬。
  17. Virtual enterprise : an effective way to implement mass customization

    企業實現大規模定製生產的有效途徑
  18. The scenes are vivid and we do not need construct mass of models in virtual reality based on graphic because of the using of pictures

    因為使用的是照片，所以畫面非常逼真，並且免去了基於圖形學方法的大量建模工作。
  19. It is too early to predict whether any of the virtual worlds will become a true mass - market hit

    現在預言虛擬世界是否將成為真正的熱門，還為時過早。
  20. In one side, it can save and manages mass product data and information of an enterprise in reasonable and virtual organize mode ; on the other hand, it can provide a suit of instrument definite and control lots of business circuits bring and use these information. as a result, it leads enterprise obtains maximum advantage by efficient utilization of product information, and optimum balance between information security and quality control

    一方面，通過合理有效的組織方式「集中」保存、管理企業中眾多產品數據與信息；另一方面，提供一組工具定義和控制企業產生和使用這些信息的諸多業務過程，從而達到在產品信息的有效利用，以及在信息安全、質量控制上的最佳平衡，使企業獲得最大效益。
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