非线性

In order to analyze the influence of pulse-width on optical nonlinearities below the band edge, the threshold intensity to examine the relative strength of bound-electronic and free carrier nonlinearity is studied.

为了分析脉冲光的脉冲宽度对带隙区光学非线性的影响，用光波传输方程研究了区分束缚电子光学非线性和双光子吸收诱导自由载流子非线性相对强弱的临界光强。

Detailed nonlinear model of camera self-calibration, non-linear wide-angle lens camera calibration technique, based on nonlinear optimization of camera calibration methods, and a step by step to solve the new linear camera calibration method.

详细说明：详细介绍了非线性模型下的摄像机自标定、广角镜头的摄像机非线性标定技术、基于非线性最优化的摄像机标定方法以及一种逐步求解的新的摄像机线性标定方法。

The linear method being used to calculate the critical wind speed of aerostatic stability by national guideline is expatiated.

提出了基于ANSYS的计算大跨径桥梁静风稳定性的非线性有限元法，充分考虑了结构的几何非线性及静风荷载的非线性。

Based on the method mentioned above, a nonlinear aerostatic stability analysis programme is developed.

最后 ，以一座主跨 10 0 0米的斜拉桥为例，分析了结构几何非线性、材料非线性和静风荷载非线性对大跨径桥梁空气静力稳定性的影响。

In this paper,a method for computation of aerostatic stability of long span bridge s,the nonlinear finite element method,is put forward.

提出一种计算大跨径桥梁静风稳定性的方法——非线性有限元法，这种方法基于ANSYS，充分考虑了结构几何非线性及静风荷载非线性的影响。

The incremental double iteration method is used to analyze the nonlinear aerostatic stability for long span cable-stayed bridges.

综合考虑了静风荷载和结构自身非线性因素的影响，引用大跨度桥梁非线性静风稳定分析理论，采用增量双重迭代搜索法对大跨度斜拉桥进行了非线性静风稳定分析。

The third-order optical nonlinearities and lime responses were measured by a phase conjugate forward, 3-dimensional degenerate, four-wave mixing technique. Comparing polymer's third-order NLO coefficient, it shows that the χsuperscript (3 value increasecs with the introduction of the azobenzol side-chain.

通过简并四波混频飞秒激光系统对各个接枝聚合物的三阶非线性极化率系数进行了测定，考察了偶氮侧链的引入对聚合物主链三阶非线性的影响，并考察了侧链上不同取代基的电子效应对主链三阶非线性的影响。

Especially, the nonlinearity bounds of functions with balancedness, with correlation-immunity, or with balanced correlation-immunity are discussed respectively. Using the relationship between nonlinearity and the order of correlation-immune, one upper bound of nonlinearity of correlation-immune functions is obtained.

尤其对满足平衡性、相关免疫性和同时满足平衡相关免疫性函数的非线性度的界分别进行了研究，利用非线性度和相关免疫阶之间的关系，给出相关免疫函数非线性度的一种新的上界。

Kinds of Schiff base derivatives of 2-N-benzylidene Furanmethanamine have been designed. The Net Charges of main atoms, bond lengths, bond angles, dihedral angles, IR have been calculated by means of HyperChem6. 0 program. 36 kinds of Schiff base derivatives of benzylidene adenine have been designed. Also the net charges of main atoms, bond lengths, bond angles, dihedral angles, IR, the energy gap △E between HOMO and LUMO and the nonlinear second-order polarizability β have been calculated by means of HyperChem6. 0 program. The calculated results indicated that the nonlinear second-order polarizability β were up in accordance with the △E down.

设计了腺嘌呤缩苯甲醛36种衍生物，计算了这些分子的气相几何，腺嘌呤缩苯甲醛中各原子的电荷分布，最高占有轨道HOMO和最低未占有轨道LUMO的能量以及它们之间的能量差△E，同时还计算了这些分子的二阶非线性极化率β，我们发现腺嘌呤缩苯甲醛的二阶非线性光学系数与△E有近似一致的变化关系，随着△E的减小，二阶非线性光学系数有增大的趋势。

The paper aim at the three-phase voltage source SPMW-inverter, which is applied in variable-speed wind turbines system, adopts the theory of nonlinear counterchange and nonlinear feedback, creates the three-phase voltage source PWM-inverter's nonlinear model, and deduces it's feedback linearization equation, consequently, the three-phase voltage source PWM-inverter active and reactive current decoupling control is proposed.

该文针对变速风力发电机组系统所用的三相电压型SPWM 逆变器，采用非线性变换和非线性反馈理论，建立了三相电压型 PWM 逆变器非线性数学模型，推导出其反馈线性化方程，从而得出三相电压型 PWM 逆变器有功电流和无功电流的解耦控制策略。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。