critical sequence analysis 中文意思是什麼
critical sequence analysis
解釋
關鍵工序分析-
Based on research of theory and methods, this thesis presents design scheme of the dynamic fault tree analysis platform dfta and implement the platform ; practices a dynamic fault tree analysis example of boeing 707 plane engine oil indication system and alarm system on the platform and gets top event occurrence rate 、 minimal cut sequence 、 probability importance sequence 、 structure importance sequence and critical importance sequence and presents system improvement suggestion based on the analysis results
在理論方法研究的基礎上，本文提出了動態故障樹分析平臺dfta的設計方案，並進行了實現;利用該軟體對波音707飛機發動機滑油壓力指示和警告系統進行了動態故障樹實例分析，得到了頂事件發生概率、最小順序割集、概率重要度排序、結構重要度排序、關鍵重要度排序等分析結果，並根據上述分析結果提出了系統設計改進建議。 -
Critical sequence analysis
關鍵工序分析 -
Key management is critical technic of realizing database encryption. in this dissertation, after analysing and comparing several popular key managemet scheme. we make improvement of two - phase key management scheme according to the matter of fact, and achieve two - phase key management scheme from user key to user class key and to data class key, through creating system table in database. at the same time, we work out key using sequence of chaotic nonlinear system. chaotic sequence is complex and recalcitrant to analysis and unpredictableness, and it can offer good complexity and comparable randomness. experiment result proves that using chaotic sequence can create good key
本文首先分析比較了幾種常用的密鑰管理方案，然後針對應用的實際情況，對兩級密鑰管理方案進行了改進，通過在數據庫中建立系統表實現了由用戶密鑰得到用戶類密鑰、以及由用戶類密鑰得到數據類密鑰的兩級密鑰管理。同時，本文利用由混沌非線性系統迭代產生的序列來生成密鑰。混沌序列結構復雜，難以分析和預測，能提供很好的復雜性、類隨機性。
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