symmetry properties 中文意思是什麼

symmetry properties 解釋
對稱性
  • symmetry : n. 對稱；勻稱；調和；勻稱美。 bilateral symmetry 左右對稱。 radial symmetry 輻射對稱。
  • properties : （特性）命令修改特性
  1. In quantum chromodynamics ( qcd ), vacuum is not trivial, that is, vacuum carry quantum numbers. such a behavior is embodied by non - perturbative con - densates of quarks and gluons. since hadrons are excitations with respect to the vacuum, hadronic properties are ultimately related to properties of the vacuum. based on the vacuum structure, some hadron properties have been described well. in the low energy region, qcd has two very important proper - ties : chiral symmetry spontaneous breaking and confinement, which are closely related to the vacuum characteristics of qcd. much experiments and theoretical studies have shown that chiral symmetry spontaneous breaking is very important to understand the low - energy feature of the strongly interacting physics, and the quark condensates give an expression to chiral symmetry spontaneous breaking. according to goldstone ' s theorem, the goldstone bosons with zero mass will emerge as the chiral symmetry is spontaneously broken. there are two ways : inear and non - linear methods to carry out this constraint. in our paper, we will use the non - linear method

    大量實驗和理論研究表明，手征對稱自發破缺對于理解低能強相互作用十分重要，而夸克凝聚又是導致手征對稱自發破缺的因素。按goldstone理論，伴隨手征對稱自發破缺應該會有零質量的goldstonebosons產生。而對于這一條件的實現有線性和非線性兩種方法本文將用非線性的方法將手征對稱自發破缺應用於su （ 3 ）模型即重子八重態，得出描述其強相互作用的手征對稱自發破缺lagrange密度。
  2. Hqet ( heavy quark effective theory ) makes this symmetry explicit and proves to be a desirable framework to predict the properties of heavy hadrons

    Hqet顯式的處理這種對稱性，是處理重味物理的合適的理論框架。
  3. In each case, we present the surface band structure together with the projected bulk band of both ideal and reconstruction surface respectively, the number of the surface states is determined, and the localized surface features and orbital properties of this surface states along the high symmetry lines in the 2d sbz are discussed

    根據電子數目規則，我們斷定處在一o . lev ~ 0 . lev的表面態為全部填滿的陰離子懸掛鍵態或者為原子再構后引起的as一asdimer鍵態，而處在1 . 4ev一1 . 6ev的表面態為陽離子空的懸掛鍵態。
  4. Comparing and analyzing the synchronous control strategy, which brings up the new method to control the double un - symmetry jars proceed synchronously with the combination of proportional valve and servo valve, which forms closed loop control ; basing on the above methods, models are made to get mathematics models of position control system and to analyze system model theoretically by using pid controller, we can realize regulating parameters, minimizing synchronous errors and enhancing the dynamic performances ; the simulink tool box in matlab software is used to imitate the system according to the model, which not only makes the result visual and easy to adjust the parameters in interactive way but also lets us understand the effects of different parameters and optimizes the dynamic properties. the theory of plc control in dshp is discussed after advanced understanding of the system movements. hardware design and general regulation are given on the base of siemens company products s7 - 200 plc

    本文根據大量的國內外文獻，對研配液壓機的工作原理及設計結構進行了簡介；對位置同步的控制方法進行了比較分析，提出比例閥和伺服閥復合控制的閉環結構來對非對稱雙缸進行同步控制電液比例同步控制方案；在此基礎上著重對比例閥控非對稱缸建模，最後得到位置控制系統的總體數學模型，從理論上對同步系統動態特性進行了分析，並用pid控制器進行參數整定，減小雙缸同步誤差、提高系統的動態響應性能；其中控制性能的分析藉助于matlab軟體中的simulink工具箱，由已建立的數學模型形成模擬模型，得到可視化的模擬結果，從而利於交互方式下調整參數，了解不同的參數對系統的影響，優化同步系統的動態性能；在深入了解系統的動作特性后，對plc控制研配液壓機的原理進行了探討，針對siemens公司s7 ? 200型plc給出了硬體設計的總體規劃，編制出研配液壓機動作控製程序，在編程中著重研究位移傳感器與plc的通訊、雙缸同步運行的pid控制在plc上的實現及bcd碼撥盤輸入程序的植入問題。
  5. This new basis provides properties analogous to berstein polynomials, including symmetry, zeros of the basis functions, positivity, normalization, etc. based on this new basis, we define a new kind of curves, to be called h - bezier curves, with control polygon

    本文利用多項式混合雙曲形式在空間中構造了一組新的基，稱為h - b zier基，它具有類似於bernstein基的端點性質，零點階數，正性，正規性質，對稱性等性質進一步，文章通過控制多邊形的方式定義了h - b zier曲線
  6. What we do at this aspect are : firstly, we describe the permutation symmetry of the structure of some special networks and the corresponding attractor sets with some geometric graphs in euclidean space, which are called attractors graph and geometrized structure graph of the networks respectively ; the geometrizing conditions are also given ; we study the dynamical behavior of the networks using the geometrized structure graph and attractors graph of the network ; moreover, we propose an approach to construct a big - size network with some small - size network with symmetry by the method of direct - sum, direct - produce and semidirect - produce. we also study the dynamical properties " relation between the big - size network and the small - size networks. all those results will provide some theoretical basis for designing a special large - scale network

    本文在這方面所做的工作如下：首次將一些特殊網路的結構和吸引子集的置換對稱性用三維歐氏空間中的一些幾何圖來表示，分別稱之為幾何結構圖和吸引子圖；給出了網路對稱性的幾何化條州即相應的對稱性群為可遷群） ：並惜助網路的幾何結構圖和吸弓吁圖分析網路的動力學性質；此外，我們提出了用簡單的具有一定對稱性的小網路按照群的直和、半直積和直積的方式組合成較大的網路的方法，探討了這些小網路和所組成的大網路的一些動力學性質的關系，如穩定態的個數、各穩定態的回憶性質等，為較大網路的設計提供一些理論依據。
  7. We also prove the following properties : the stable states of the network in the same sh orbit have a same dynamical behavior, such as the size of attraction basin and the energy ; the relation of the symmetry of two isometric networks h and h ' = g - h is s ' h = g - sh - g ~ } for any isometry g, where sh and s ' h are the symmetry of h and h " respectively ; the isometry will not change the dynamical properties of the stable states set of the corresponding networks ; etc.

    ） g的對稱性s _ h和s _ n的關系為s _ h = g ? s _ h ? g ~ （ - 1 ） ；等距變換不會改變網路穩定態集的動力學性質等一系列的結論。所有這些研究結果表明了hebb學習法則是通過調整網路的連接矩陣，使得其的結構的對稱性包含存儲樣本集的對稱性這一存儲機理。
  8. Systemic research including the influence of the crown ether ring ' s symmetry, the size and the conformation on the liquid - crystalline behavior have been done in this paper. the synthesis way and method were improved. from the experimental results, it was found that : 1, compounds 2, 4, 16, 17 and 18 have liquid crystal properties

    優化和改進了合成路線及方法，對席夫堿型液晶冠醚，因取代基的大小、冠醚環的大小和冠醚環的對稱性以及不同結構的順反構型對液晶性能的影響等諸方面進行了較系統的研究，取得了一系列具有規律性的結果。
  9. For coupled - quantum - dot systems, no matter the spatial symmetry, size and tunnel coupling strength between quantum dots are all controllable. in this way, the dream of controlling solids is realized. for this reason, the transport properties of systems consisting mutiple quantum dots have attracted the interest of physicists

    對于耦合量子點體系，無論其組成的量子點的空間對稱性，還是量子點的尺寸、相互之間的耦合強度都是人為可以調控的，從而實現了人們操縱固體的夢想，並因此而受到廣泛的關注。
  10. Natural properties of mutation, growth, and symmetry are drawn parallel to global social issues of cultural hybridization and development

    把自然性的基因突變，發展和保持平衡與文化雜交和發展的全球性社會問題作一個比較。
  11. Chiral symmetry spontaneous breaking and confinement are two very important properties of low energy qcd

    手征自發破缺和色禁閉是低能qcd的兩個重要性質。
  12. Having developed two theorems in the present thesis on the degeneracy properties of the photonic crystal in the super cell, i can give how the degeneracy will change in the band structure of the photonic crystal corresponds to the change of the translational symmetry of the photonic crystal

    為了研究平易對稱性對光子晶體頻帶的影響，我在超包（ supercell ）中詳細研究了頻帶簡並的變化，並發展了幾個決定這些簡並變化的定理。
  13. Some properties of adjoint matrix are discussed. the properties are symmetry, antisymmetry, positive definite, positive semi - definite, orthogonal and characteristic value

    摘要討論了伴隨矩陣在對稱、反對稱、正定、半正定、正交、相似和特徵值等方面的性質。
  14. The symmetry properties of the optical coherence with respect to the detuning of the light frequency from resonance show up in specific symmetries of the spectra

    研究表明，透射光譜隨薄膜厚度的增大而展寬，光譜呈現對稱性。
  15. At the same time, according to the excellent capability of ip curves, we study fitting and description of objects, determination of invariants of objects, symmetry detection and recognition of objects based on ip curves. in all, the main contributions in the dissertation are as follows : ( 1 ) a method of determining automatically the scale of the multiscale edge detection is proposed based on the variant distance of the variogram function, and a method of segmenting texture images is also presented. the variograin values are taken as stochastic and structural properties of texture images and variant distance is taken as the size of image window

    同時，基於隱含多項式曲線良好的物體描述與識別能力，對物體邊界輪廓的擬合、描述、不變量特徵的提取、識別以及物體對稱性檢測作了系統的研究，主要成果及創新之處有： （ 1 ）基於變差函數的變程，提出了圖像多尺度邊緣檢測中尺度大小的自動確定方法；將變差函數的變差值作為紋理的統計和結構特徵，依據變程確定窗口大小，給出一種新的紋理圖像的分割方法。
  16. Electrons or any other "particle" should display wave properties to preserve the complementary wave-particle symmetry of nature.

    電子及其他任何粒子都應該顯示波的性質，才能體現自然界波粒互補的對稱性。
  17. They have a number of desirable properties not possessed by wavelets of daubechies type, namely : they have symmetry property ; the scaling function and physical space representation are identical ; expansion coefficients are easily computed ; in certain respects they are more accurate ; the functions ( but not their derivatives ) can be computed without solving an eigenproblem. the price to be paid for these advantages is the loss of orthogonality, interpolating wavelets are only biorthogonal

    本文主要的研究成果是把一維的某些結論推廣到高維，分為以下四個方面： （ 1 ）使用二元拉格朗日插值法構造二元尺度函數和小波函數，使其具有緊支性、對稱性以及函數展開式的系數易於計算等優點。唯一的缺陷是缺乏正交性。
  18. Cyclic symmetry in blade - disc assembles is often destroyed by small differences in the individual blades ’ structural properties that result from manufacturing and material tolerance, this phenomenon commonly knows as mistuning

    葉片?輪盤的周期對稱性經常由於製造、材料以及非均勻磨損和其他因素被破壞，引起系統出現失調現象。
  19. Symmetry properties of theme image in light in august

    主題意象的對稱性
  20. Starting from symmetry properties of equation and considering the variable - coefficient of the equation as a new dependent variable, a new general method to solve variable - coefficient equation is proposed. the solution of variable - coefficient equation can be expressed by an arbitrary solution of the corresponding constant - coefficient equation. taking schridinger equation as a concrete example, the method is recommended in detail

    將非線性方程的變系數看作與實際物理場具有相等地位的新變量，利用普遍的經典李群方法可以求解某些特殊類型的變系數方程，其解由相應的常系數方程的解表示.以非線性薛定諤方程為具體例子，介紹了這種方法.並給出了特例色散緩變光纖變系數非線性薛定諤方程的精確解
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