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In the last chapter, by introducing the isochronous center of real systems into complex planar and defining complex center and complex isochronous center, a concise linear recursion formula for period constants is given, necessary and sufficient conditions of complex isochronous center (the Time-Angle Difference Theorem) proved, conditions of real systems with linearizable center and saddle treated unitedly and the isochronous center conditions discussed fully for a class of real planar cubic systems.

在第七章，通过把实系统等时中心引入复平面研究，定义了复中心和复等时中心，给出了等时中心周期常数计算的简明的线性递推公式，证明了等时中心判定的充分必要条件，统一地处理了实系统具有可线性化的中心和鞍点条件，并对一类实平面三次系统的等时中心条件进行了完整研究。

After the student's delineation of his growth stories, the teacher remarked, to a class of weepy red-eyed students and SAs; This student stood up today and unfolded a wonderful life before us. Behind the splendor of his life lies the strength and depth of life.

这个学生在诉说著成长的过程，现场的同学和学长还红著眼睛，拧著鼻子时，听到老师说：这位同学一站上来，就展现了精采的人生；在他精采生命的背后，有著生命的力量和深度。

In this paper, we present a class of equation model for image denoising and edge enhancement. The model is based on robust statistics error norm and variational theory. By analysing the parameters of the equation and designing the methods of module partitions, the numerical experiments reach a good result and the parallel efficiency has been improved remarkably with finite difference method.

本文基于稳健统计误差模函数及变分原理构造了一类用于图像去噪、增强边缘的方程模型，对相关参数进行了分析，设计了该方程有限差分数值求解的并行算法，并对分块模型及实现过程进行改进，提高了并行效率，在此基础上完成了并行数值实验，并对结果就误差模选取、并行效率等方面进行了分析。

From the viewpoint of the wireless networks, the sources of network-induced delay are identified for a class of WiNCS built on the WSN. Because the routing severely affect the total round-trip time delay in this WiNCS, a novel routing algorithm that can minimize the total round-trip time delay is proposed, the detailed implementation of the algorithm is introduced.

针对基于无线传感网络实现的无线网络控制系统，从网络通讯的角度分析了网络延时的组成，在此基础上，提出了一种实现最小网络延时的路由算法，对路由算法的设计和实现进行了详细叙述。

A new method of fault diagnosis based on the nonlinear spectral analysis for a class of nonlinear systems with the Volterra series solution is given in this dissertation. The new method consists of three elements.

本文对一大类可以用Volterra级数描述的SISO非线性系统进行了研究，在前人研究的基础上，提出了一整套工程可实施的基于非线性系统频域分析的故障检测与诊断理论和方法。

A necessary and sufficient coindition for the existence of positive solutions of a class of singular boundary value problems of higher order differential equations is given by means of the method of lower and upper solutions with the maximum principle.

摘要利用上下解方法和极大植原理给出了一类高阶微分方程的奇异边值问题正解存在的充分必要条件。

We study the attractive manifold method of the iterative learning control for a class of degenerate systems in the chapter Ⅲ. When the learning control systems don't satisfy the convergence condition, we present the learning control method satisfying the condition by constructing a stable and attractive manifold corresponding system. This method makes the system with better robustness.

第三章主要研究了一类退化系统目标跟踪的迭代学习控制的吸引流形方法，在系统不满足一般收敛条件的情况下，我们通过构造一个相应于所给系统稳定而吸引的流形，导出所满足要求的迭代学习控制，该方法对系统有较好的鲁棒性。

The vast natural forests, the proliferation of a number of rare birds and animals, the habitat of more than 30 kinds of wild animals, a class of national protection Takin, deer, golden cats, clouded leopards, and so on; there are two categories of protection of musk deer Ling, Ma musk deer, white deer hip , Cranbrooki, stone marten, otter, lynx, monkeys, Temminck's pheasant, chicken MA, Golden Pheasant, giant salamander, frozen dark belly, the belly light frozen, spoon bird, blood pheasants, black bears, red scales Qinling Salmon, and so on.

广阔的天然森林，繁衍了许多珍禽异兽，栖息着30多种野生动物，有国家一类保护的羚牛、梅花鹿、金猫、云豹等；二类保护的有羚麝、马麝、白臀鹿、斑羚、石貂、水獭、猞猁、猕猴、红腹角雉、兰马鸡、红腹锦鸡、大鲵、暗腹雪鸡、淡腹雪鸡、勺鸟、血雉、黑熊、秦岭红鳞鲑等。

These results are applied to solve a class of inverse eigenvalue problems for real matrices with a submatrix constraint and the expression of general solution and best approximation are also given.

最后，将所得的结果应用于子阵约束下实矩阵特征值反问题的最小二乘问题，得到了该问题解的表达式与最佳逼近解。

"Sulfa drug: Common term for sulfonamide drug, any member of a class of synthetic antibacterial drugs with a particular chemical structure including Both sulfur and nitrogen atoms."

磺胺药：任何同时含有硫和氮原子的特殊化学结构的合成抗菌药物。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。