非諧項 的英文怎麼說
中文拼音 [fēixiéxiàng]
非諧項
英文
anharmonic term-
The higher-order effects of the field on the particle motion give rise to anharmonic terms in the vibrational hamiltoniom.
場對粒子運動的高階效應在振動哈密頓量中引起非簡諧項。Treating the anharmonic terms of potential energy as perturbations, and employing the formulas for atomic displacements and hamiltonian in phonon occupation number representation, the formulas for thermal expansion coefficients of crystal nano - wires are derived and the numerical calculations are carried out in this paper
摘要將原子間相互作用勢的非諧項作為微擾，運用聲子數表象中的晶格原子振動位移和晶格振動哈密頓公式，推導了納米晶體線的熱膨脹系數公式，並進行了數值計算。Based on the vibration test in yantan hydropower house, in this paper the author adopt les method which belong to three dimensions unsteady turbulent flow numerical analysis to simulate vibration resource characteristics of hydrogenerator set, a harmonic vibration model of powerhouse substructure is put forward to carry out firstly a precise modal analysis and dynamic response analysis for generator floor. the numerical calculation results agree well with the surveyed data in situ
本文結合巖灘水電站廠房振動的試驗研究，採用非定常湍流數值分析的大渦模擬方法進行混流機組水力振動振源模擬；提出一種水電站廠房下部結構簡諧振動模型，首次進行了發電機層樓板結構的精確模態分析和水力激振荷載下的動力響應分析，各項計算結果與實測數據吻合良好。In the second part, we try to apply orthogonal polynomial approximations to the dynamical response problem of the duffing equation with random parameters under harmonic excitations. we first reduce the random duffing system into its non - linear deterministic equivalent one. then, using numerical method, we study the elementary non - linear phenomena in the system, such as saddle - node bifurcation, symmetry break bifurcation, phenomena in the system, such as saddle - node bifurcation, symmetry break bifurcation, period - doubling bifurcation and chaos
本文第二部分嘗試將正交多項式逼近方法應用於隨機duffing系統，提出與之等價的確定性非線性系統的新概念，並用數值方法對該系統在諧和激勵下的鞍結分叉、對稱破裂分叉、倍周期分叉、和混沌等各種基本非線性響應進行了初步探討。Saw transmission speed is one of the most important indexes in all characteristic parameters about piezoelectric wafer, directly deciding resonator frequency of the device. therefore, knowing about saw transmission speed and it ' s consistency in batches of saw producing looks like very vital
在壓電基片的各項性能中， saw的傳播速度是最重要的指標之一，它直接決定了器件的諧振頻率，所以在saw器件的批量生產中了解基片聲表面傳播速度及其一致性顯得非常重要。分享友人