拓撲不變的 的英文怎麼說

中文拼音 [tàpūbùbiànde]
拓撲不變的 英文
topologically invariant
  • 拓 : 拓動詞（把碑刻、銅器等的形狀和上面的文字、圖形印下來; 拓印） make rubbings from inscriptions pict...
  • 不 : 名詞[書面語] （剁物所用的木墩） a block of wood
  • 的 : 4次方是 The fourth power of 2 is direction
  1. As we all known, with the founding of euclidean geometry in ancient greece, with the development of analytic geometry and other kinds of geometries, with f. kline " s erlanger program in 1872 and the new developments of geometry in 20th century such as topology and so on, man has developed their understand of geometry. on the other hand, euclid formed geometry as a deductive system by using axiomatic theory for the first time. the content and method of geometry have dramatically changed, but the geometry curriculum has not changed correspondingly until the first strike from kline and perry " s appealing

    縱觀幾何學發展的歷史，可以稱得上波瀾壯闊：一方面，從古希臘時代的歐氏綜合幾何，到近代解析幾何等多種幾何的發展，以及用變換的方法處理幾何的埃爾朗根綱領，到20世紀拓撲學、高維空間理論等幾何學的新發展，這一切都在不斷豐富人們對幾何學的認識；另一方面，從歐幾里得第一次使用公理化方法把幾何學組織成一個邏輯演繹體系，到羅巴切夫斯基非歐幾何的發現，以及希爾伯特形式公理體系的建立，極大地發展了公理化思想方法，不管是幾何學的內容還是方法都發生了質的飛躍。
  2. We introduce five topological characteristics and geometry characteristics that are invariant under projective transformation specially perspective projection. the definition of homograph is given by means of these characteristics, and then the recognizing method of the homograph is proposed according to the definition of homograph

    接著，根據透視投影不變性提出了5個用來描述多邊形形狀的拓撲特徵和幾何特徵，這些特徵在透視投影下是不變的，以這些特徵給出了在透視投影下平面多邊形為類似形的定義。
  3. In the first part, the concepts of the completely normal spaces and strong completely normal spaces in l - topological spaces are defined, which are the generalization of the completely normal spaces in general topological spaces. they are some good properties such as hereditary, weakly homeomorphism invariant properties, good l - extension, but they are n ' t producible in general. moreover, their several sufficient and necessary conditions in induced spaces are presented

    第一部分的主要內容如下：第一部分這一部分是將一般拓撲學的完全正規分離性的概念推廣到了l -拓撲空間，給出了l -拓撲空間的完全正規分離性和強完全正規分離性的定義並討論了它們的若干性質，比如，它們都是可遺傳的，弱同胚不變的， 「 lowen意義下好的推廣」等。
  4. Through comparison of characteristics for different dc / dc topologies, buck - boost converter was selected as main topology of the power system

    在充分考慮不同dc / dc變換器拓撲特點的基礎上，本文選用了buck - boost作為系統的主電路拓撲。
  5. We investigate finer time scale statistical properties of this traffic, including burstiness, periodicity, and synchronization. utilizing the data gathered by our simulator, we compared the results with our prediction, after that, we investigated the root cause of a specific networking traffic pattern, under various network configuration and policies. the importance of our work is not only analyzing the cause of each traffic pattern, but also providing a beneficial formal method for future research

    在實驗結果的分析過程中，我們根據當前流行的網路拓撲建立了模擬路由試驗環境，特別針對lsa的突發性、周期性和同步流量的時域特徵進行了觀察，不僅探究了三種重要lsa流量的發生機理以及這些流量的變化對整體路由效率的影響，比對了我們的預測與最終的實驗結果，深入研究了統計圖表裡各種異常情況的成因和路由協議採用不同演算法和策略以後對整體路由環境的影響。
  6. Switch - based interconnects with irregular topology allow the wiring flexibility, and incremental expansion capability required in this environment. however, the irregularity also makes routing and deadlock avoidance on such systems quite complicated

    Autonet ， myrinet等用於nows的交換式高速網路使布線靈活、系統可擴展能力加強，但其拓撲的不規則性使路由避免死鎖的問題變得復雜。
  7. In the electrical control the action of power electronic switch changes the structure of electrical circuit, the electrical circuit has character of discontinuity. the control electrical circuit formed by power electronic switch is described as variable structure control system

    在電力系統控制中，由於電力電子開關的動作改變電路拓撲，系統具有不連續性，使得各類電力電子開關組成的控制電路可以被描述為變結構控制系統。
  8. The molecular structure of alkanes is described by anovel molecular subgraph coding method, recently developed in this laboratory. it has been shown that there exist very good quantitative structure property / function relationships ( qspr / qsfr ) between the coding and 7 thermodynamical functions and 8 physical properties of alkanes

    在拓撲不變量的基礎上直接將子圖分類、計數、編碼，提出了一種新分子拓撲子圖指數，已數字化的子圖編碼部分保持具體分子結構的直觀信息。
  9. 18 cohen f s, huang z, yang z. invariant matching and identification of curves using b - spline curve representation

    第四，利用圖像畸變的拓撲不變性質對特徵匹配剪枝，降低計算代價。
  10. There is an important problem for the wdm network which is the traffic on the wdm network is dynamically variable, as a result, if the traffic on the virtual topology has changed, the performence of the network such as average number of weighted hops, the throughput of the network, the congestion of the network will decline, obviously, this is not acceptable for both the network administrators and network clients. in this thesis, the research of the plan of the wdm network under dynamically variable traffic can be classified into two main directions

    Wdm光傳送網是下一代高速廣域骨幹網的最具競爭力的候選者，但是， wdm網路存在的一個重要問題是在wdm網路上運行的業務量是動態變化的，這造成的結果是最初通過搭建光路設計好的光網路虛拓撲在新的業務量矩陣下它的性能如網路平均權重路由跳數，網路負載均衡性，網路擁塞等性能指標都有可能下降，這顯然是各個網路運營商和網路用戶所不能忍受的。
  11. This converter not only retains the advantages of ttfc but also has only two camping diodes. moreover the proposed converter operates at nearly unity duty - ratio for very high efficiency and eliminates the voltage overshoot of the output rectifying diodes

    本文提出了一種新型直直變壓器拓撲，該拓撲不僅保留了雙管正激變換器的優點，而且在原邊僅含兩個續流二極體，電路結構簡單。
  12. Carbon nanotubes and polycyclic aromatic hydrocarbons ( pahs ) are important research objects of structural chemistry. hexagonal system, which is used to represent mathematicaliy pahs in organic chemistry, is developed perfectly in this century. while the theories concerning different topological invariants and parameters on hexagonal systems tend gradual1y to achieve great successes, the performance of the calcu1ations by pen and paper is still rather tedious, or even impossibie, when the size of molecules increases

    碳納米管和多環芳烴（ pah ）是結構化學的重要研究對象，從圖論角度描述有機化學中多環芳烴的六角系統在近代得到了很大的發展，對六角系統的各種拓撲不變量和一些參數的計算已趨完善或正在逐步完善。
  13. Apf can achieve dynamic compensation for harmonics and reactive current, and the compensate performance is not affected by the impedance of the electric network, it has advantages as follows, fast response, high controllability and adaptability, etc. analysis is performed to existing main circuit topology, harmful current detecting method and current tracking control of apf in this paper

    有源電力濾波器可實現對諧波和無功的動態補償，其補償特性不受系統阻抗的影響，具有響應快、可控性高、自適應性強等優點。本文對現有的有源電力濾波器的各種主電路拓撲、畸變電流檢測和電流跟蹤控制方法進行了分析。
  14. In this thesis, six topological characteristics and geometry characteristics are proposed that are invariant under affine transformations and axonometric projection. the definition of homograph is given based on these characteristics, and then the recognizing method of the homograph is proposed according to the definition of homograph at the same time

    其次，根據仿射不變性提出了6個用來描述多邊形形狀的拓撲特徵和幾何特徵，這些特徵在軸測投影下是不變的，以這些特徵為約束條件給出了在軸測投影下類似形的定義。
  15. The beginning point of the first research direction is that we design a type of load - balancing virtual topology which is insensitive to the traffic, such plan method has been proposed whose name is vlbs ( valiant load - balancing schemem ), the disadvantage of vlbs is that it can only be applied to the homogeneous network in which each node has the same capacity, in chapter2, a more general valiant load - balancing scheme ( gvlbs ) has been proposed, the advantage of the gvlbs is that it can be used both on the homogeneous network and heterogeous network, in this chapter, we will give the detail derivation process and numerical analysis. the beginning point of the second research direction is that we first design a virtual topology for the physical topology under a specific traffic matrix, for a while, the traffic has changed, the network performence will decline. under such condition, in chpater 3, a virtual topology reconfiguration algorithm is studied which can decrease the average weighted hops

    本文針對動態變化業務量情況下的wdm網路設計方法劃分為兩個主要的研究方向，第一個方向的研究出發點是可以在最初的虛拓撲設計過程中根據物理拓撲情況設計出一種虛拓撲出來，該虛拓撲是負載均衡的，在這種虛拓撲上跑的業務量矩陣特徵只要在某種范圍以內，無論它怎樣動態變化，網路都不會出現擁塞，但這種虛拓撲設計演算法vlbs的一個缺陷是它只能適用於同構網路，即每個節點所擁有的容量大小都相等，在第二章中，本文提出了一種更通用的負載均衡的光網路虛拓撲設計演算法gvlbs ，該演算法與傳統的負載均衡演算法vlbs不同之處在於vlbs演算法只能適用於同構網路而gvlbs演算法既可以適用於同構網路，又可以適用於異構網路，在本章中將給出了gvlbs演算法的的詳細推導和數值分析。
  16. Based on the advantage of the solid - switch, many fcls with solid - state switch have been proposed. fcl with series compensation which could limit the fault current and also make compensation is more flexible and practical when compared to the others. in this paper, a type of fault current limiter with series compensation is studied

    基於此，研究者提出了各種不同拓撲結構的採用固態開關的故障限流器，其中，帶串聯補償的故障限流器，既具有串聯補償的功能，又能根據短路的實際情況改變限流程度，因而具有較大的靈活性和實用性。
  17. Under the condition of unchanged topology configuration of the truss, the extremum existence of the natural frequency is demonstrated. it will orientate the optimization of structural cross - sections and the topology optimum with frequency constraints toward a further search measure. 4

    證明了在保持結構拓撲基本不變的情況下，桁架結構優化頻率的極值存在，為具有頻率約束的結構的橫截面積優化以及進一步的拓撲優化提供了優化指向； 4
  18. Not only have the reseach results about go - space enriched the contents of general topology, but also have increased ingenious creativity and breakthrough and made general topology more wonderful and lively because of making use of the theory about ordinal and cardinal in set theory, axiomitic system and combinatorial theory

    一個世紀來， go -空間的研究成果不僅在內容上豐富和充實了一般拓撲學，而且由於藉助集合論的基數和序數理論、公理體系及組合思想等，在方法上也給一般拓撲學增添丁巧妙的創造性和突破性，使一般拓撲學變得更加精彩生動。
  19. The main results are as follows : ( 1 ) there exists an one - to - one correspondence between the invariant measures of mutually topologically equivalent semi - flows, and there also exists an one - to - one correspondence between the invariant measures of a continuous map and that of its suspended semi - flow

    我們證明了如下結論： （ 1 ）在拓撲等價的連續半流的不變測度之間以及在連續自映射及其扭擴半流的不變測度之間存在一一對應，並且這對應保持遍歷性。
  20. Topology changes in one part of a network are not instantly known in other parts of the network due to propagation delay

    由於傳播延遲，某部份的網路拓撲改變時，在網路的另一個部分並不見得能立即知道。
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