理论模型

Theoretical models abound in all branches of science.

理论模型比比皆是，在所有学科。

The formation mechanism of the absolute instability and gyrotron backward wave oscillations is analyzed, and the methods to suppress the parasitical modes are discussed.The nonlinear theory model of gyro-TWT is consummated by considering the influence of tapered magnetic field and waveguide radius, electron velocity spread, and waveguide loss on electron beam-wave interaction. The large-signal characteristic of gyro-TWT, such as launching loss and absolute instability, are also analyzed in detail. This work establishes the foundation for the development of a gyro-TWT amplifier.

重点研究了两段损耗波导结构和损耗陶瓷结构回旋行波管中的电子注-波互作用，分析了绝对不稳定性和回旋返波振荡的形成机制和抑制寄生模式的方法；完善了回旋行波管的非线性理论模型，并考虑了磁场和波导半径渐变、速度零散、波导损耗等因素对注-波互作用的影响；详细分析了发射损耗、相位稳定性等回旋行波管的大信号特征，为回旋行波管放大器的研制奠定了基础。

This photon frequency dependence of the two-photon absorption coefficient has been fairly interpreted by the Dinu model.

利用现有的Dinu理论模型解释了双光子吸收系数谱的这种频率特性。

The theoretical model of two dontrol loops for an accelerometer was described in this paper.

本文论述了加速度计两个控制回路的理论模型。

Based on the theoretical framework of the leakage and spread of such poisonous and harmful substances as glycol and acraldehyde, this paper advances the graphic simulation of GIS of poisonous and harmful substances.

以石化企业乙二醇、丙烯腈装置产生的有毒、有害物质泄漏、扩散和污染范围的理论模型为根据，提出有毒、有害物质的地理信系统扩散图形模拟方法。

The theory of Civil Society and Corporatism has been the dominant model in explaining intermediary associations.

已有的关于近代中国自愿性社会组织的研究，集中在历史学领域，其理论模型也主要是公民社会理论。

Based on the crystal field theory, perturbation formulas of the spin Hamiltonian parameters g-factors (fourth-order) and the hyperfine structure constants (third-order) of 3d9 ions under tetragonal symmetry are established for the cases of small spin-orbit coupling coefficients and large spin-orbit coupling coefficients of the ligands.

本文基于晶体场理论，在较统一的理论模型和计算方法基础上运用微扰法分别对配体旋轨耦合系数较小和配体旋轨耦合系数较大的情况建立了3d9离子的自旋哈密顿参量g因子的四阶微扰公式和A因子的三阶微扰公式。

Results: The theoretical model for the functional problems of Chinese disease control and prevention institutions was successfully established and suggestions for the development of national disease control and prevention institutions were put forward.

结果：构建了我国疾病预防控制机构功能作用问题理论模型，并提出了我国疾病预防控制机构发展对策思路模型。

The MHD stirring chamber has found it's application in micro c...

建立了搅拌混合器的理论模型，并对其动力特性进行了数值分析，理论结果与实验结果相吻合。

A rational explanation is given by application of modified Langmuir adsorption theory based on the experimental results.

对以上实验结果用修正的Langmuir吸附理论提出合理的解释，建立了理论模型，并推导出了数学公式。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。