查询词典 characteristic line

In the second chapter, the problem of the optimal inputting rate control for a class of competitive population dynamics system with age-structure is discussed. By means of characteristic line, Gronwall Lemma, Bellman Lemma, adjoint system and so on, the Lipschitz continuity properties of the system in terms of the control variable is certificated, and the necessary condition of the optimal control is obtained.

第二章讨论了一类具有年龄结构的竞争种群系统最优输入率控制问题，综合应用特征线法，Gronwall引理，Bellman引理，共轭系统等知识，证明了系统解关于控制变量的Lipschitz连续性，给出了控制为最优的必要条件。

The formal solution of partial differential equations is given on characteristic line, the existence of the optimal control is proven by using Ekeland\'s variational principle, Gronwall Lemma and adjoint system, then the necessary condition of optimality is obtained by means of the conception of normal cone.

用特征线法表示出偏微分方程的形式解，利用Ekeland变分原理，Gronwall引理和共轭系统证明了最优控制的存在性，并借助于法锥概念得到了最优控制的必要性条件。

At first this paper introduces a new method which is named as the concentric circles cutting method of drawing terrain characteristic line on the basis of contour vector data, and has made the program design and realized to this method.

本文首先介绍了一种基于等高线矢量数据提取地形特征线的新方法——同心圆剖切法，并对该方法进行了程序设计与实现。

According to the requirements of line generalization,new algorithms for identifying characteristic line points are presented.

针对手形的特点和现有手形认证方法的不足，提出了一种基于曲线拟合的手形生物特征认证新算法。

To characteristic line as the center, characteristic line farther away from land distribution affected by the characteristics of the smaller lines.

以特征线为中心，特征线远离受影响的土地分配的特点，规模较小的线路。

Taking the development platform of HVDC power transmission for example, the calculation result of impedance-frequency characteristic of traditional line commutated converter and that of FCC are compared. Simulation results show that the impact of impedance-frequency characteristic of converter on the resonance frequency of AC system is not negligible, and FCC can enhance the strength of AC system in a certain extent, improve system stability and effectively reduce AC equivalent impedance under resonance frequency, thus the harmonic instability of HVDC power transmission system can be avoided.

以直流输电开发平台为例，对传统电网换相换流器(line commutated converter，LCC)与FCC的阻抗频率特性计算结果进行对比，仿真结果表明换流器的阻抗频率特性对交流系统的谐振频率有着不可忽略的作用，FCC在一定程度上提高了交流系统强度，改善了系统稳定性，有效降低了系统谐振频率下的交流等值阻抗，从而更好避免直流输电系统谐波不稳定现象的发生。

According to the plastic equilibration equation and the theory of characteristic line, the stress equations of slip line in axial symmetry deformation on compressible materials were derived on basis of simplified yield criteria in this paper.

本文在可压缩材料简化屈服准则的基础上，根据塑性平衡方程和特征线理论推证出了可压缩材料轴对称问题的滑移线应力方程，提出了应力方程数值差分解

Slip line ; stress characteristic line ; velocity slip line ; non\|associated flow rule

滑移线；应力特征线；速度滑移线；非关联流动法则

The analytical expression of non-characteristic line stress boundary condition in the slip line field theory for geotechnical materials

基于滑移线场的简化流动模型，运用数学方法求解出了一种锥形模正挤压变形力的最佳上限解，并将该上限解用通用解析式表达出来。

At the basis of them, In this paper, by calculating adjacency characteristic polynomial, the number of closedcircuit, using the property that bipartite graphs with same Laplacian spectrum must be Line-cospectral and the property of graphs with the same eigenvalues and angles to study some non-regular graphs with special structure.

在前人的基础上，本文通过计算图的邻接特征多项式，闭路数目，利用二部图同Laplacian谱必Line-同谱的性质，以及有相同特征值和角的图的一些特点来研究一些特殊结构的非正则图的谱确定问题，得到了如下一些结论：(1)两个不同构的C_(n_1，(n_2)，(n_3)，(n_4)图没有相同的邻接谱。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。