directed cycle 中文意思是什麼
directed cycle
解釋
定向循環-
In the upswing of the long construction cycle, the rural exodus was directed internally to the industrial cities.
在一個長建設周期的繁榮階段，農村人口的大批外流是流向國內各個工業城市。 -
The two - stage modeling method takes into account the characteristics of software project risk management and software metrics data, integrates qualitative knowledge and quantitative data. to study the software project iterative process risk ’ s bayesian network model, the definition of cyclic bayesian network is presented, probability convergence property of directed cycle in cyclic bayesian network is proved and probability inference method is put forward
論文在軟體項目迭代過程風險的貝葉斯網路模型研究中，定義了有環貝葉斯網路，證明了有環貝葉斯網路中有向環的概率收斂性質，給出了有環貝葉斯網路的概率推理方法。 -
Based on the timing constraints event model of rtl ( real time logic ), the compiling algorithms for timing constraints event transform the problem of how to detect timing constraints event to the problem of how to find negative cycle in weighted directed graph, which is named as constraints graph. by simplifying constraints graph, the efficient detecting algorithms for timing constraints event have been developed, which not only has good time complexity but also can find events that violate timing constraints as early as possible. in order to verify the event detecting methods based on dynamic rules and to check its efficiency in application, experiment schemes are designed and performed on the implemented prototype system in linux environment
帶時間約束事件的編譯演算法以rtl （ realtimelogic ）事件模型為基礎，將帶時間約束事件的檢測轉化為在帶權值的有向圖（此即受限圖）中尋找負圈的問題，它通過化簡受限圖得到最小有效約束集；運行時事件檢測演算法在最小有效約束集上檢查事件的時間約束，不但有較好的執行效率，而且能盡早地發現違反時間約束的事件。 -
This thesis contributes to directed cycles in digraphs, including the relations between the girth g ( d ) ( length of the shortest directed cycle ) of d and degrees of vertices of d and between the shortest directed cycle of d and the binding number of d, among which vertex - transitive digraphs are studied in detail
本篇論文主要研究有向圖中的有向圈，討論有向圖中的圍長g （ d ） （最短有向圈的長度）與圖的頂點度以及結合數之間的關系，並重點分析了點可遷圖類。 -
Zhang liji ( material physics and chemistry ) directed by professor xie xiaoming this paper is intended to solve problems for those who are designing, using pbgas. failure mechanism, as well as cycles to failure of two groups of pbga samples ( with / without underfill ) for thermal cycling conditions in the range of - 40 ~ 125, were presented. the experiment shows that solder ball in the samples without underfill cracked after 500 times cycle, no crack was found in the underfilled samples even after 2700 cycles
通過一系列的實驗，得到以下實驗結果： ?在本論文設定的溫度循環條件下，未充膠pbga樣品的熱疲勞品壽命在500周左右，充膠樣品的焊點壽命高於2700周； ?對于未充膠器件，中心距（ dnp ）是決定焊點應力、應變大小的最主要因素，裂紋總是從中心距較大處萌生並向中心處擴展； ?溫度循環的過程中焊盤附近焊料組織明顯粗化。 -
It plays an important role in the cryptography due to its effective pseudorandom. the state - graph of m sequence of order n is a directed hamilton cycle of de bruijn - good graph of order n
N級m序列的狀態圖就是n級德布魯恩-古德（ debruijn - good ）圖的一個有向hamilton圈。 -
In 1973, r. c. entringer raised the following question : determine which simple graphs g have exactly one cycle of each length l, 3 l v. in this paper, entringer ' s problem is extended to directed graphs and get serveral results about uniquely pancyclic digraphs
Entringer提出了確定唯一泛圈圖的問題，即確定簡單圖g使得對3 l v的每個l恰有一個長為l的圈。本文將entringer這個問題推廣到定向圖中，研究了唯一泛圈有向圖的若干問題。 -
A uniquely pancyclic digraph is a digraph which has exactly one directed cycle of each length l, for 3 l v, where v is the number of vertices of the digraph
一個唯一泛圈有向圖是一個定向圖，且對3 l v的每個l ，它恰好有一個長為l的有向圈，這里的v表示有向圖的頂點數。
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