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測試塑料光纖衰減的三種方法:截斷法、插入損耗法和後向散射法。

1) cut-back method
截斷法
1.Three Attenuation measuring methods for plastic optical fiber including the cut-back method, the insertion-loss method and the back-scattering method are introduced.
介紹測試塑料光纖衰減的三種方法:截斷法、插入損耗法和後向散射法。
2) Galerkin truncation method
Galerkin截斷法
1.Then, the nonlinear bending of a saturated poroelastic cantilever beam with fixed end impermeable and free end permeable,subjected to a suddenly applied constant concentrated transverse load at its free end,was examined with the Galerkin truncation method.
利用Galerkin截斷法,研究了固定端不可滲透、自由端可滲透的飽和多孔彈性懸臂樑在自由端突加集中載荷作用下的非線性彎曲,得到了梁骨架的撓度、彎矩以及孔隙流體壓力等效力偶等的時間響應和沿軸線的分佈。
2.Based on the mathematical model for large deflection of saturated poroelastic beam,the dynamical behavior of simply supported saturated poroelastic beam with two permeable ends,subjected to a suddenly applied transversal constant load or a harmonic load,was investigated with Galerkin truncation method.
基於飽和多孔彈性梁大撓度變形的數學模型,利用Galerkin截斷法,本文研究了兩端可滲透的簡支飽和多孔彈性梁分別在突加橫向均布常載荷和簡諧載荷作用下的動力響應,得到了梁彎曲時撓度、彎矩以及孔隙流體壓力等效力偶等隨時間的響應,考察了不同載荷下多孔彈性梁彎曲的響應特徵。
3.Longitudinal vibration equation which governs a pipeline laying in 3000 meters underwater under construction in the case of untouched seabed is established and solved by Galerkin truncation method.
針對國內目前在建的3000m深海管道鋪設系統,在管道未觸海床的懸空工況下,建立了管道的縱向振動方程,應用Galerkin截斷法對方程進行了求解,並進一步分析了波高、波頻等海況參數對管道各截面動態應力和振動幅值的影響,分析結果有助於深入了解大深度管道鋪設中的動力學行為,並可為深海管道鋪設施工設計提供理論依據。
3) truncated spectra analysis
譜截斷法
4) modal truncation
模態截斷法
1.For an intelligent plate with piezoceramics slices attached on both surfaces,an element model with 12 DOFs and 2 electrical DOFs is adopted and the dynamics differential equations are deduced by means of Hamilton principle,and whose order is lowered in state space by modal truncation,minimal realization and balancing xeduction.
先採用4節點矩形彎曲薄板單元(含12個位移自由度,2個電自由度)的有限元模型,利用Ham ilton原理得到了智能板結構的運動微分方程,然後綜合運用模態截斷法、最小實現法和平衡降階法,對壓電智能板結構的系統狀態方程進行了降階處理,得到了可觀可控且低階的近似狀態方程,針對該降階后的系統,利用H∞控制理論求解出能抑制干擾的動態輸出反饋控制器,並將該控制器作用到降階處理前的原系統中,從而能實現原系統抗干擾的振動控制。
2.In this paper,dynamic modeling and application of the modal truncation approach(MTA) to a high-speed rotating thin elastic plate are studied.
研究了做高速旋轉柔性矩形薄板的耦合動力學建模理論和模態截斷法的應用。
5) blocking and reversing therapy
逆挽截斷法
6) Balanced truncation method
平衡截斷法

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