force density 中文意思是什麼

force density 解釋
力密度
  • force : n 1 力，勢。2 體力，氣力，精力，魄力。3 暴力，壓力；兵力，武力。4 〈pl 〉 部隊，軍隊，兵力。5 勢...
  • density : n. 1. 稠密；濃厚。2. 【物理學】濃度；密度；比重。3. 愚鈍，昏庸。
  1. The drag force decreases as the air density decreases.

    當空氣密度減小時阻力也減小。
  2. In this paper, the flow pattern defects ( fpds ) were revealed by secco etchant and their shape, distribution on wafer and tip structure were studied in details by optical microscope and atomic force microscope ( afm ). the relationship between etching time and the tip structure of fpds was also discussed. furthermore, by studying the effect of rapid thermal annealing ( rta ) on the density of fpds in ar, the annihilation mechanism of fpds was discussed in this paper

    本文將cz硅單晶片在secco腐蝕液中擇優腐蝕后，用光學顯微鏡和原子力顯微鏡對流動圖形缺陷（ flowpatterndefects ， fpds ）在矽片中的形態、分佈及其端部的微觀結構進行了仔細地觀察和研究，並討論了腐蝕時間對fpds缺陷端部結構的影響；本文還通過研究ar氣氛下快速退火（ rapidthermalannealing ， rta ）對fpds缺陷密度的影響，初步探討了fpds的消除機理。
  3. The results show that : the main driving forces of arable land change of shouguang county are the per capita income, the ratio of the pasture output value, the ratio of the cropping output values and the ratio of agricultural labor force proportion ; the main driving forces of arable land change of quzhou county are the variation of grain yield per unit area, the ratio of the pasture output value, the ratio of the cropping output values, the ratio of grain field areas and the population density

    結果表明：壽光市耕地變化的主導驅動力包括人均收入、牧業總產值比例、種植業總產值比例和農林牧漁業勞動力；曲周縣耕地變化的主導驅動力包括糧食單產、牧業總產值比例、種植業總產值比例、糧田面積佔耕地面積比例和人口密度。在此基礎上，揭示縣域尺度上耕地變化的驅動機制，並為進一步進行土地利用覆蓋變化研究積累方法和經驗。
  4. For form - finding of membrane structures, the common methods mainly indued three theory : nonliner fem, dynamic relaxation method and force density method

    對于索膜找形分析，目前普遍常用的是非線形有限元法、動力鬆弛法和力密度法。
  5. This thesis also introduces some kinds of the jointing of cable and membrane strucfores. an open - air palestra has been designed in this thesis. the force density method has been used to analyze the shape, and the nonlinear finite method has been used to analysis the loads

    最後，本文還採用文中推導的離散方法，通過力密度法對某風雨操場進行形態分析，並通過將找形結果用非線性有限元法在無荷載狀態下計算結構的應力，結果表明本文推導的方法找形精度是足夠高的。
  6. Therefore, in principle the scattering may be predicted from measurements of the surface profile. in this paper the author also discussed nonspecular scattering for mo / si multlayer coated primary and secondary mirrors of the measured schwarzschlid optics based on power spectral density of these mirrors measured by both optical profilometer ( wyko ) and atomic force microscopy ( afm )

    因此，我們可以通過檢測多層膜反射鏡基底的粗糙度來表徵多層膜反射鏡非鏡面散射對光學系統性能的影響，亦即通過檢測多層膜反射鏡基底的粗糙度調整拋光工藝參數，獲得低散射的多層膜反射鏡。
  7. ( 2 ) the images of aam were characterized by scanning electron microscope ( sem ), transmission electron microscope ( tem ) and atom force microscope ( afm ). the results indicated that pores in the as - prepared aam templates owned nearly the same diameter, parallel arrangement, huge density and formed nano - pore arrays

    （ 2 ）用sem 、 afm和tem等分析方法對aam的形貌進行了表徵，結果表明：制得的aam中含有大小均勻一致、排列規整、密度較大的納米孔陣列，為模板-電沉積法制備cdse納米線陣列奠定了良好的基礎。
  8. The flow characteristics, distributions of current density and chemical components, and the performance of these two different designs are calculated and compared. the flow and mass transport characteristics are analyzed in detail, which indicate that strong forced convection is produced in the interdigitated flow field, which consist of dead - end gas channel that force the gases through the porous electrodes. results of comparison show that forced convection induced by the interdigitated flow field in the diffusion layer effectively enhances mass transport of reactants and products, thus leading to a higher cell performance and the limiting current density

    在傳統流道設計的pemfc中，反應物從流道到催化層的供應和生成物從催化層到流道的排出主要是以擴散為主，而在交叉梳狀流道設計中，以流動帶動的對流傳遞則占據了主導地位，而且這種以對流為主的傳遞機理大大提高了反應物和產物傳遞速率，從而有效地改善了電池的極限電流密度和極化性能等特性。
  9. According to gaseous " molecular kinetic, the mass diffusion rate is within finite value. so theoretical conclusion of mass flux ' s producing and the essential relation of flux vs. force could be drawn. with the assumption that local density states in near equilibrium and the distribution is gradual changed, the classical first pick ' s law was modified considering mass relaxation time

    根據氣體分子運動論對質量傳播速度為有限值情況下的質量流的產生及流與力之間的本構關系作了理論推導，在假定局域濃度處于近平衡態，其分佈為漸進的情況下得到了考慮質量鬆弛作用的經典fick第一定律的修正式。
  10. The correlated degree of the density of deformed and failured masses and correlative dynamic force factors in tiger - leaping gorge reach are analyzed by effect measure analysis method which combines qualitative and quantitative analysis, and the key dynamic factors of bank - slope stability are established, which can provided the scientific information for origin division, evaluation, prevention of geological hazards and project planning

    本文採用定性與定量相結合的效果測度分析方法，對虎跳峽河段岸坡變形破壞密度與相關動力因子進行關聯度量化分析，從而確定了影響岸坡穩定的關鍵性動力因子，可為水電開發中的岸坡災害成因類型劃分、危險性評價、災害治理和工程規劃設計等提供科學依據。
  11. Based on the equilibrium equation, the states of self - stress and the modes of inextensional mechanisms are solved by the singular value decomposition method. and the equilibrium equation can be solved by the generalized inverse method. the force density method is proposed

    在建立空間桿件體系平衡方程的基礎上，採用廣義逆方法求解各種情況下的平衡方程，採用奇異值分解方法求解索桿的機構位移模態和自應力模態，並推導了力密度方法的基本公式。
  12. A selfequilibrating stress system must be found. force density method is deve1oped for form finding

    本文推導了用力密度法進行索膜結構形狀確定的理論公式。
  13. Lateral force density

    橫力密度
  14. Shape - finding of cable net and membrane structures by force density method

    索和膜結構的力密度法找形分析
  15. Lines of force density

    力線密度
  16. The force density method and the nonlinear finite element method are used together to do form - finding analysis of the membrane structures

    採用力密度方法和幾何非線性有限元方法聯合求解已知預應力分佈求解幾何的形態分析。
  17. Based on the principle of the force density method, a new shape finding method for the solution of this special problem is developed

    該方法不受結構形式的限制，且引入了很少的計算假定，能夠解決不同形式的索桿張力結構施工過程的形態分析問題。
  18. ( 2 ) the theory of the form - finding analysis of the cable - membrane structure with the force density method is deduced explicitly and corresponding formulae are obtained

    （ 2 ）對應用國際上比較流行的力密度法對索膜結構進行找形分析的問題進行了一系列的理論推導，得出了相關的公式。
  19. According to that, the calculation program of the form - finding analysis of cable - membrane structures using the force density method is composed on the platform of digital visual fortran 5. 0

    並且，根據理論推導的結果，應用digitalvisualfortran5 . 0編制了對索膜結構進行找形分析的力密度法計算程序。
  20. Two approaches of dispersion with force density method in form finding of cable and membrane are derived in this thesis. programs are compiled based on the theory the joillting must guarantee the smoothly transfer of stress

    用力密度法找形的一個關鍵問題是如何將膜片離散，本文推導了兩種離散方法運用於力密度找形分析中，並編制了計算程序。
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