线性

In Chapter 5, we study three dimensional elasto-plastic frictional contact problems with orthotropic friction law. Parametric variational principle and parametric quadratic programming method are applied to analyze this class of complicated mechanics problems. A linear complementarity problem formulation is derived.

在第五章，我们采用正交各向异性摩擦定律模型对三维弹塑性摩擦接触问题进行分析，将正交各向异性的摩擦定律线性化后，将参变量变分原理和参数二次规划法应用到这一复杂的力学问题中来，最终将问题化为线性互补问题模型。

Based on a general parametric eigenstructure assignment result proposed for descriptor linear systems via proportional plus partial derivative state feedback and a result for generalized eigenvalue sensitivity problem of matrix pairs, parametric representation of the closed-loop eigenvalue sensitivities to the perturbed elements in the open-loop system matrices is obtained. An effective algorithm for eigenvalue assignment with minimum sensitivity in descriptor linear systems via proportional plus partial derivative state feedback is then proposed.

摘要基于广义线性系统比例与部分状态导数反馈参数化特征结构配置结果和矩阵对广义特征值灵敏度结果，得到了关于开环系统矩阵中摄动元素的闭环特征值灵敏度的参数表达式，并在此基础上提出了广义线性系统比例与部分状态导数反馈最小灵敏度特征值配置的有效算法。

In the chapter 4, we discussed the generalized linear inversion method of direct current IP data from the angle of the least squares method. The computed speed of inversion can be greatly raised by calculating the partial derivatives matrix combining the reciprocity principle with Broyden\'s quasi-Newton method.

在第四章中，从最小二乘广义线性反演的角度，探讨了直流激电数据的广义线性反演方法；在偏导数矩阵的计算过程中，通过将互换原理与Broyden拟牛顿技术相结合的计算方式，可大大提高反演的运算速度。

The studies about the periodicity and stability is of basic requirement for the verification and the design of hybrid control system.

研究了线性切换系统的周期性和稳定性规律，给出线性切换系统周期性的充要条件及平稳性的充分性判据。

The effect of CIT on sea state and target detection is analyzed and it is pointed out that with the existing system modern high-resolution spectral estimation methods must be used in place of the traditional periodogram.

分析了线性调频雷达的抗噪声及干扰能力，研究了距离域噪声的相关函数与其时域输入噪声的相关函数的关系，得出带宽越大相关距离越小的结论，并指出线性调频波形产生的系统处理增益为其时宽-带宽积。

Based on the nonlinear dispersion relation of electromagnetic wave in relativistic plasma, the nonlinear controlling equation for linearly polarized mode is obtained using Karpman's method. The modulation instability of intense laser pulse propagating through relativistic plasma is analyzed and the modulation instability growth rate as a function of perturbation wave number for laser beam propagating through relativistic plasma is given.

从相对论等离体中电磁波的非线性色散方程出发，利用Karpman方法获得了线性偏振波模所满足的非线性控制方程，在非线性色散方程和非线性控制方程的基础上对线性偏振激光在相对论等离体中传播的调制不稳定性进行分析，给出了调制不稳定的时间增长率与扰动态波数之间的函数关系。

The value of the Wiener Index for a class of linear phenylene molecular graph is calculated, and the linear recursive formulas is obtained, and then the exact expressions are gained by solving some difference equations of the recursions.

文章给出了一类一般线性聚亚苯基图hQ的Wiener拓扑指标的线性递推公式，通过求解差分方程而得到了它的Wiener拓扑指标的精确表达式。

For the low linear saturation threshold of photoelectric detector,a new and reliable method used in diagnostic system is introduced to attenuate high energy laser power density using multilayer dielectric coating.

针对环形光刀取样式高能激光束在线测量系统应用中光电探测器线性饱和功率密度低而被测高能激光功率密度高的特点，采用对取样激光扩束和介质膜衰减片级联衰减的方式，实现了数千倍的线性光强衰减。

Finite element methods are analyzed, where the stress is approximated by the discontinuous Raviart-Thomas element of lowestorder,and the velocity by the piecewise constant element,and the Lagranian multiplier by the trace space of the piecewise continuous linear element.

然后发展其有限元方法：对应四变量分别用间断型Raviart-Thomas最低阶元，分片常数元，连续线性元和连续线性元的迹空间，我们获得了稳定性和最优误差界，通过后处理办法，我们得到一个适合于计算的速度-压力格式，该格式可视为"mini"元方法的一个变形（本文格式中引用了局部投影算子）。

Because the piecewise linear chaos function is adopted in the encryption system, it is difficult to avoid the local linearity.

且在该加密系统中，由于采用了分段线性函数作为混沌函数，因此难以避免便于攻击的局部线性等特点。

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。