permutation test 中文意思是什麼
permutation test
解釋
排列檢定- permutation : （數學中）排列變化，徹底改變
- test : n 1 檢驗，檢查；考查；測驗；考試；考驗。2 檢驗用品；試金石；【化學】試藥；（判斷的）標準。3 【化...
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In the paper the driver and passenger ' s finite element airbag model and multi - body mini - van cab model were established, and law of the injury parameters of occupants due to the airbag main parameters variation were obtained. the model was validated against the test results and optimized with the permutation and combination of the airbag main parameters 3
論文中建立了駕駛員側和乘員側安全氣囊有限元模型和微型車駕駛室多剛體模型，通過調整安全氣囊主要控制參數得出了乘員損傷參數的變化規律，利用窮舉法對所選安全氣囊參數進行了最優化，並通過試驗驗證了最優化模型的準確性； 3 -
Then taken four kinds of maps for examples, comparing with m - sequence, their properties are calculated, verifying the advantages of the chaotic sequence generated by the new method. after this, an improved scheme is discussed - - using m - sequence to change the sequence ’ s turn and verifying that the permutation parameters have effect on improving the sequence ’ s properties. in chapter 5, monte carlo simulation method is used to test performances of our sequences ’ applications in the given model of direct spread spectrum cdma system, and results of error rate of the system are given ; the comparing resuls of performances of anti - multi - access interference and anti - multi - address interference of different pn sequence is also shown in this thesis
本文首先對擴頻通信中常用二進制偽隨機序列的產生方法、性能特點進行了總結，指出了現有二進制偽隨機序列的應用局限性;其次，根據混沌非線性系統特徵，深入研究了混沌數字序列的產生方法;在此基礎上，提出了一種新的產生方法中間抽取法，然後，以四種混沌映射系統為例，對其所產生的混沌數字序列進行了偽隨機特性實驗數據分析，並與m序列進行比較，結果說明了混沌數字序列代替傳統擴頻序列的優點，同時驗證了新方法的可行性。
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