external symmetry 中文意思是什麼
external symmetry
解釋
外對稱-
For the mesoscopic metal ring system in external magnetic field, supposing the system has a symmetry under translation in charge space, the quantum current and the quantum energy spectrum in mesoscopic metal ring are given by solving thire eigenvalue equations ; and the quantum fluctuations of the current and the energy have been calculated by the character of the minimum shift operator
摘要針對處于外磁場中的介觀金屬環系統，假設在電荷空間中具有變換的對稱性，通過求解本徵值方程給出系統的量子電流、能譜關系；利用最小平移算符的性質等，計算介觀金屬環中電流和能量的量子漲落。 -
For one - dimensional mesoscopic metal rings system in external magnetic field, supposing the system has a symmetry under translation in charge space, the quantum current relation in mesoscopic metal rings is given by solving the eigenvalue equation of the current, the property of quantum current have been investigated and analysed
摘要針對處于外磁場中的一維介觀環系統，假設在電荷空間中具有變換的對稱性，通過求解電流算符的本徵值方程，給出系統中的量子電流關系，分析和研究一維介觀金屬環中量子電流的性質。 -
Chapter two focuses on the basic characteristics of the beauty of mathematics and its gradation which lays the theoretical foundation for the beauty of mathematics. the basic characteristics can be summarized as conciseness, symmetry, uniqueness and unity and the connotation, the manifestation and the ideology of each characteristic are analyzed in detail. in addition, the beauty of mathematics is divided into three levels in the sequence from exterior to interior and from junior to senior, i. e., external formal beauty, internal rational beauty and creative beauty
第一部分包括前二章：第一章探究了美與數學美的概念，提出了「美和數學美」的定義，分析了其實質與內涵；第二章著重論述了數學美的基本特徵及其層次劃分，將數學美的基本特徵概括為簡潔性、對稱性、統一性和奇異性，詳細分析了每個特徵的內涵和表現形式，最後從外到內、低到高將數學美劃分為外在形式美、內在理性美和創造美三個層次，奠定了數學美的理論基礎。 -
The results show that the heaviest stress concentration is found at the interval nozzle - vessel junction of the longitudinal symmetry plane, while the stress concentration around the external junction is decrease because of the welded joint
計算結果表明，縱向對稱面筒體與接管的內相貫處是應力集中最嚴重的部位，外相貫處由於有焊接接頭而使應力集中大大緩解。 -
The external symmetry i. e. universality of geographical laws in urban sense is found to relate to the internal symmetry : the more symmetric a model is, the more universal the corresponding law is, and vice versa
研究發現，城市地理系統在宏觀層面具有對稱性質，這意味著普適性地理規律的存在;微觀層面對稱破缺，這暗示城市地理系統模型的參數具有時空變異性質。
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