Further more , the new nonlinear method for constructing high order resilient functions is present , and a lower boundary of these functions " nonlinearity is also obtained by using the definition of local nonlinearity 同時還給出了構造高階彈性函數新的非線性方法,并通過運用局部非線性度的定義,得到了這些彈性函數非線性度下界的一個關系。
In chapter four , the security of the local and the integer on cryptographic functions are analyzed , and a new measure index of local security , namely local nonlinearity is also introduced . moreover , the relation of both the local nonlinearity and nonlinearity of cryptographic functions was opened out 第四章分析了密碼函數的整體安全性與局部安全性,其中引入局部安全性新度量指標?局部非線性度,揭示了密碼函數的(整體)非線性度和局部非線性度的關系。
Considering the local nonlinearity of the rotor - bearing system , a systematic dimension reduction method is applied in this paper for low - pressure rotor - bearing of the 200mw turbine set system . the model of the rotor - bearing system is established by fem ( finite element method ) . the fixed - interface component mode synthesis procedure is applied to significantly reduce the dimension of the system 本文針對200mw汽輪發電機組低壓轉子?軸承系統,采用了一種系統的降維分析方法:利用有限元方法建立了轉子?軸承系統的有限元模型,然后利用固定界面模態綜合法顯著地降低系統的維數。