theory z z 中文意思是什麼

theory z z 解釋
理論
  • theory : n. 1. 理論，學理，原理。2. 學說，論說 （opp. hypothesis）。3. 推測，揣度。4. 〈口語〉見解，意見。
  • z : n （pl Z s z s ）1 英語字母表第二十六個字母。2 【數學】第三個未知數；（中世紀羅馬數字的）2000。3 ...
  1. Diffraction theory for collinear dual beam z - scan

    掃描的衍射理論
  2. According to the theory of z - map model, the contour data is re - constructed in new sequence forming 3 - axis parallel milling tool path

    根據z - map模型的原理，用行列結構對邊界點數據進行重新排列，從而得到3軸平行式加工刀軌。
  3. The keys to the families, genera and species of hepaticae and anthocerotae in hebei are worked out, and the dissected graphs are pictured. moreover, the chinese name, science name, major reference literatures, collect locations, collector and number of specimen, as well as geographical elements and distribution of every species are narrated explicitly. in the hepaticae - flora of hebei, grimaldiaceae, porellaceae and frullaniuccae arc regarded as dominant, showing obvious temperate - zone character and distinct torrid - zone nature, raising the tropic origion theory of china botany - flora which brought forward by professor z. y. wu

    同時，根據標本和資料編制了河北省苔類植物科、屬、種檢索表，詳細記述了每種的中文名、學名、主要參考文獻考證、標本採集地、採集人和標本號，在河北省和中國各省區及世界范圍的地理分佈等，描述了每一種與其相近似種的主要區別點和識別特徵，並根據標本和文獻對其中54種做了顯微繪圖。
  4. When the isotropic waveguide is under the isotropic disturbances, the coupling term due to polarization, which is presented in the coupled - mode theory of the wei - ping huang, is n ' t included in this rigorous vectorial coupled - mode theory, exactly, the rigorous vectorial cmt does n ' t contain the coupling term due to polarization which is include in the scalar coupled - mode theory because this term is counteracted with the other coupling term neglected under weakly guiding approximation. as for anisotropic disturbances, we get the coupled - mode equations with arbitrary dielectric tensors. from them, we obtain the coupled - mode equations of the slowly varying term c ( z ) which is more simplicity

    當受到各向同性微擾時，我們發現嚴格的矢量理論所得到的耦合系數表達式中並不包括wei - pinghuang的理論中的偏振耦合項，更確切的說，偏振耦合項正好與因弱導近似而忽略的項相抵消，這就是標量理論所得到結果（有偏振耦合項）與矢量理論在標量近似下的結果（不含偏振耦合項）不一致的原因所在；當各向異性微擾時，我們得到了包含微擾介電張量各個分量的橫電磁場耦合波方程，討論了微擾介電張量各個分量對耦合的影響，而且從橫電磁場耦合波方程出發得到了形式更加簡單的只含有橫電場系數的緩變分量c _ （ z ）的耦合波方程和耦合系數表達式，並以弱導近似下的單模光纖兩正交偏振模耦合為例對耦合系數在不同條件下的取捨做了定性的分析。
  5. The fractal theory was used to study the character of liquid - vapor interface in the paper, hence the application of the fractal theory in thermal subjects could be solved and a way to calculate the fractional dimension number in the process of simulation could be put forward. the fractional dimension number describing the character of the liquid - vapor interface was calculated. the distinct fractional dimension numbers in x, y and z direction reveal that the simulation system is an anisotropic one

    並將分形理論運用到汽液界面的研究中，提出了在汽液界面中計算分維數的方法，得到了描述汽液界面特性的數字特徵變量? ?分維數，同時根據所得到的x 、 y和z方向分維數的不同，證明了汽液界面是各向異性的，並對汽液界面進行了定性和定量的分析，得到了汽液界面是典型的分形面的結論。
  6. Supposed that the fluid in all the fields will accomplish a transport in down - flow distance a z, the flow in trickle - bed is a m step markov process, where m = z / z ( z - the height of trickle - bed ). according to the theory of random process, the statistic of the markov process will be calculated out from the original distribution and state - transport matrix

    假定液體從床層上端面向下流過z距離后，處于各區的流體就實現了一步轉移，則可將床內液體的流動視為從一個初始分佈開始，經過m步（ m = z z ， z為床層高度）轉移的狀態離散、滴流床流率分佈的模擬與整流時間離散的markov過程。
  7. The paper is concerned with periodic solutions to nonautonomous second order hamilton systems where, m : [ 0, t ] - s ( rn, rn ) is a continuous mapping in the space s ( rn, rn ) of symmetric real ( n x n ) - matrices, such that for some u > 0 and all ( t, z ) [ 0, t ] x rn, ( m ( t ) x, x ) > u | x | 2. a s ( rn, rn ), f : [ 0, t ] x rn r is continuous and f : [ 0, t ] xr r exists, is continuous and we study the existence of periodic solutions of the systems by using ekeland variational principle and the saddle points theorem. we suppose that the nonlinearity vf and potential f belongs to a class of unbounded functional. our work improves the existed results. we obtained the results of multiplicity of periodic solutions of the systems by using lusternik - schnirelman category theory and the generalized saddle points theorem, and the functional does not need the condition of constant definite. at last, we obtained the existence of infinity many distinct periodic solutions of the corresponding non - perturbation systems by using the symmetric mountain pass theorem

    （ ? ， ? ）為r ~ n中內積， | ? |為對應范數。 f [ 0 ， t ] r ~ n r連續， ? f （ t ， x ）存在且連續， h l ~ 1 （ 0 ， t ； r ~ n ） 。利用ekeland變分原理和鞍點定理討論了該系統周期解的存在性，把非線性項和位勢函數放寬到一類無界函數，推廣了這方面工作的一些已有結果；利用廣義鞍點定理和lusternik - schnirelman疇數理論得到了該系統的多重周期解，取掉了泛函的常定要求；最後利用對稱山路定理得到沒有擾動時系統的無窮多周期解。
  8. 7 zhou z h, wu j, tang w. ensembling neural networks : many could be better than all. artificial intelligence, 2002, 137 : 239 - 263. 8 penev p s, atick j j. local feature analysis : a general statistical theory for object representation

    利用類似的思想， pentland等人5將本徵臉方法擴展到局部特徵，即用眼鼻口等重要面部特徵分別得到本徵眼eigeneye本徵鼻eigennose本徵嘴eigenmouth ，並將它們統稱為本徵特徵eigenfeature 。
  9. We studied the nonlinear optical properties of novel clusters of pentanuclear planar open structure using the excited - state z scan theory

    應用激發態z掃描理論研究了平面開式五核金屬團簇的非線性光學性質。
  10. Gribov combined the nonrelativistic glauber multiple collisions theory with quantum field theory and fe ynman diagram technique so that relativistic kinematics could be included. based on glauber - gribov theory, b. z. kopeliovich et. al. developed green function method to calculate the shadowing effect in p - a drell - yan process

    Gribov將描述高能非相對論的多次碰撞的glauber理論與量子場論和費曼圖聯系了起來，從而glauber - gribov理論可以描述相對論情況下的多次散射，基於這一理論， b . z . kopeliovich等提出用格林函數方法計算p - a碰撞的drell - yan過程中的遮蔽效應。
  11. The theory of rough sets, presented in 1982 by polish mathematician - z

    數據挖掘是知識發現過程中的核心步驟。粗糙集理論是波蘭數學家z
  12. The rough set theory ( rst ), which was introduced by z. pawlak in 1982, is a tool to deal with vagueness and uncertainty. its main idea is inducing decision or classification rule through knowledge reduction by keeping the classify ability

    粗糙集理論是波蘭數學家z . pawlak於1982年提出的一種處理不確定和不精確數據的理論，其主要思想是在保持分類能力不變的前提下，通過知識約簡，導出問題的決策或分類規則。
  13. In this context, the nlo properties of three kinds of essa ultrathin films are investigated systematically in terms of experiment and theory. the main contents are list in the following : based on the traditional z - scan theory and the huygens - fresnel ( h - f ) diffraction integral principle, we present a double - sided film z - scan theory that is suitable to characterize the nlo properties of the double - sided nonlinear mediums

    本論文從實驗和理論上系統地研究了三類靜電自組裝超薄膜的光學非線性，主要研究內容如下:在已有的z - scan理論基礎之上，基於惠更斯-菲涅耳衍射積分原理推導出了適合於表徵雙面非線性介質光學非線性的雙面膜z - scan理論。
  14. Numeric simulation showed that for the closed - aperture z - scan considering the two - photon absorption, the simulation results were well consistent with the conventional theory

    對于考慮雙光子吸收的河南大學光學專業2001級碩士論文閉孔z一掃描曲線，其結果與經典的z一掃描理論的結果也完全一致。
  15. 4 ) based on the matrix theory and the constraint condition of the z transformation, a rapid and effective algorithm of ambiguity decorrelation is provided. this algorithm is called osd ( ordering screen decorrelation )

    4 ）基於矩陣理論和z變換的約束條件，提出了一種性能優越的模糊度去相關演算法?排序篩選去相關演算法（ orderingscreendecorrelation ? osd ） 。
  16. 32nd acm symp. theory of computing, portland, usa, may 2000, pp. 163 - 170. 22 berry m, drmac z, jessup e. matrices, vector spaces, and information retrieval

    本文闡述了面向服務的語義重疊網路的設計原理創建與維護，並通過模擬和對比論證了語義重疊網路如何有效地推動服務資源的發現。
  17. This theory has better accuracy than the conventional z - scan theory because the approximate conditions are only thin sample and small non linear absorption

    該理論的近似條件只要求薄樣品和小非線性吸收，比傳統理論具有更好的準確性。
  18. Rough sets ( rs ) theory, introduced by z. pawlak, is a new mathematical tool to deal with knowledge, particularly when knowledge is imprecise or inconsistent

    Roughsets （ rs ）理論是一種處理不確定、不一致數據的新的數學工具。
  19. By the theory of z transformation of linear system and matrix, we proved the validation of the averaging filter method using in ietd to cancel oscillation. then we illustrate the disadvantage of using averaging filter and give a new averaging filter that we note as phase - modified averaging filter, which can reduce the disadvantage. at the end of this chapter, we study the potent of reducing the time - cost of ietd by taking account the short duration characteristics of incident impulse

    本文第二章，首先簡述了時域積分方程遞推解法（ ietd ） ，然後推導了應用於旋轉對稱體的，能夠減少計算量的ietd方法，重點闡述並應用線性系統的z變換理論和矩陣理論研究了ietd方法中遇到的穩定性問題，從理論上證明了平滑濾波技術的有效性，指出了它對計算精度的影響，並在分析的基礎上提出了新的相位修正平滑濾波方法。
  20. Z - minimal sets and their applications to theory of z - continuous posets

    連續偏序集的應用
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