点角

The Zero-time discontinuity mapping is deduced in detail and the compound piecewise smooth map of corner-collision bifurcation is given.

数值结果表明该非光滑系统中存在周期运动的鞍结分岔和角点碰撞分岔现象。8。

The corner-collision bifurcation of piecewise smooth systems is addressed.

推导了零时间不连续映射并给出角点碰撞分岔的分段映射。

A plane figure consisting of four points, no three of which are collinear, connected by straight lines.

四边形，四角形由四个角组成的平面图形，没有任何三个点共线，通过直线相连接

Mathematics A plane figure consisting of four points, no three of which are collinear, connected by straight lines.

四边形，四角形：由四个角组成的平面图形，没有任何三个点共线，通过直线相连接

These papers are arguments with unique insights and from different perspectives, a multi-angle, multi-level and profound study of Meirigeng Gegen's life and works that cater to the readers academically and pleasurably.

该集立论准确，观点鲜明，见解独特，角点各异，是一部全方位﹑多角度、多层次深邃研究梅日更葛根生平学术生涯的学术性﹑趣味性极高的论文集萃。

Some new method is presented in this paper: A. An Integrated parameters computation method to analysis asynchronous operation of the turbine generator is given, including the equivalence of short circuit and open circuit of field windings, deducing boundary condition of 〓 method and computing frequency parameters. B. A new memory structure for sparse complex matrix and a PCCG method based on it are introduced to save memory and computation time. C. An equivalent method of vacuum is presented, and effectively eliminate the effect of corner point and accelerate convergence of PCCG method. D. Coupling the computation of electromagnetic and temperature field is discussed and model for computing temperature field of the turbine generator rotor at asynchronous operation is built.

文中提出了以下新方法：(1)在失磁异步运行转子三维涡流场计算中提出了完整的参数计算方法，其中包括励磁绕组开、短路的等效，〓法边界条件的推导及频率参数的计算方法；(2)提出了铁心内空气域的等效方法，有效地解决了开槽引起的角点奇异问题，并提高了方程组的迭代收敛速度；(3)在〓法有限元模型中，创立了一种能节约内存、提高计算速度的压缩存储矩阵格式，并建立了基于该格式的方程组解法；(4)提出了涡流电磁场和温度场两种不同场计算的合理结合方法，建立了转子三维稳态和时变温度场的有限元计算模型。

An improved algorithm based on least square fitting is given to search corner and point of tangency.

提出了一种基于最小二乘拟合的改进算法，来进一步确定角点和切点，并对轮廓分段识别。

The eleven point curvature-computing method is used to locate the area of corner and point of tangency.

采用最大方差法将图像二值化，用图像形态学的梯度细化和修剪算法来提取边缘轮廓，利用十一点曲率法得到轮廓的角点和切点的大致位置。

This method includes the method of profile data modeling in theory, bound searching method of expansion polar angle corresponding theoretical points and evaluation method of least-deviation profile error.

包括实现轮廓度测量的理论轮廓数据建模方法、对应理论点的扩展极角定界搜索方法以及满足最小条件的最小极偏差轮廓度误差评定方法。

Feature points ; geometric gravity center ; polar radius ; argument angle

特征点；重心；极径；幅角

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。