查询词典 singular boundary point

Based on long term study, we put forward new algorithm of recognizing fingerprint directional diagram: the iterative algorithm based on model, which revises the singular points (central point and triangulation point) and fingerprint directional diagram through local and global iteration. Hence, the algorithm can recognize the directional diagram and singular point more accurately and can extract detail features more accurately.

经过长期的研究，我们提出全新的判别指纹方向图算法：基于模型的迭代算法，通过局部和全局反复迭代修正图像的奇异点和指纹方向图，更能准确地判断指纹方向图、奇异点，从而更能准确地提取细节特征点。

The admissible input of 2-D linear discrete singular general model is discussed more deeply, some very effective new criteria for the 2-D singular general model to accept all the input sequence have been developed, and a new algorithm that determines the admissible input sequence of the 2-D singular systems has been proposed.

在线性广义2-D系统可解性方面，首先研究了线性广义2-D连续—离散系统的可解性问题，给出了可解的条件，并给出了等价的判别条件；其次深入研究了线性广义2-D离散系统的允许输入序列问题，给出了系统接受所在区域上的所有输入的新的非常有效的判别方法以及确定系统允许输入序列的新的方法。

Singular bilinear system, different from a linear singular system, is a kindof nonlinear singular systems.

本文的主要工作就是研究广义双线性系统的故障诊断与容错控制。

Singular bilinear system, different from a linear singular system, is a kind of nonlinear singular system. Control theories and applications of nonlinear systems have always been a hot research focus due to their potentials.

广义双线性系统是最接近广义线性系统的一类广义非线性系统，非线性系统的理论分析与应用一直是控制领域研究的热点与难点。

Estimation of parameters for general liner functional model with singular covariance. First, the Rao decomposition of the sample variance and the known singular measure error variance are presented and then the square measure error with singular variance and the standardized condition are got.

首先讨论了样本协方差与已知的奇异度量误差方差的Rao分解，给出了含有奇异方差广义逆的二次度量误差和模型的标准化条件，证明了二次度量误差与广义逆的选取无关。

A kind of concise nalytic-graphic approach for singular position analysis of complex multilooped planar mechanisms was put forward,I.e,firstly,let the mechanism be deconposed into basic kinematic chains,then deduce the singularity conditions of these BKC and lastly determine the singular position of the mechanism from the corresponding singular geometric figure.

提出了复杂多环路平面机构奇异位置分析的一种简明的分析图解方法，即先将机构分解为基本运动链，再导出基本运动链的奇异性条件，后由其相应的奇异几何图形，解出其机构的奇异位置。

This chapter clarifies the nested relationship between the matrix family of unitary, orthogonal, Givens, Householder, permutation, and row or column symmetric matrices. A precise correspondence of the singular values and singular vectors between the unitary-symmetric matrix and its mother matrix is derived and proved (hence a fast algorithm of singular value decomposition for unitary-symmetric matrix is straightforwardly obtained), and the corresponding perturbation bound is provided.

该章揭示了酉对称矩阵、正交对称矩阵、 Givens 对称矩阵、 Householder 对称矩阵、置换对称矩阵和行对称矩阵之间的逐级包含关系；推导并证明了，酉对称矩阵的奇异值和奇异向量与母矩阵的奇异值和奇异向量之间的定量关系，据此可得酉对称矩阵奇异值分解的快速算法；给出并证明了摄动矩阵的摄动界。

The flow pattern signal is approximated by convolution of standard singular function and Gaussian function on every scale, and singular exponential of signal local singular points can be worked out with least square method.

本文基于流型信号奇异性分析的结果得到了分层波状流和段塞流模糊判别的隶属度函数。

The advantages and disadvantages of balanced truncation, singular perturbational method and generalized singular perturbation are analyzed. A quasi-generalized singular perturbational model reduction method is proposed.

分析了平衡截断法、平衡奇异摄动法和广义平衡奇异摄动法存在的优缺点，提出了一种近似广义奇异摄动模型降阶算法。

Based on varying process of generator terminal parameters after excitation fault, shortages of excitation protective principle of static stability boundary and asynchronous impedance boundary are analyzed. It proposed that excitation fault research relates to large-disturbance stability. Because dynamic power-angle character of generator after excitation fault is non-sinusoidal, there are differences between dynamic power-angle character and static state power-angle character. So it isn't ideal to protective operation result based on small-disturbance stability and static stability boundary criterion. At the same time, it proposed that asynchronous boundary impedance criterion is a constant reactive power circle moving adown j Xd′. It can ensure complete loss-of-excitation generator measuring impedance enter into the circle, but can't ensure the other condition measuring impedance including impossible losing synchronism enter. So loss-of-excitation protection would be maloperation when system voltage drops short and recovers or generator rejects load.③Based on stability principle, it puts forward setting conditions and calculation method of generator loss-of-excitation protection by direct measuring power-angle.

以励磁故障后发电机端的相关参数的变化为基础，通过对以静稳定边界和异步阻抗边界作判据的两类三种现行励磁保护在原理上存在的缺陷分析，发现：励磁故障是一个大干扰稳定性问题，励磁故障后的发电机的动态功角特性与静态功角特性有很大的差异，已远非正弦曲线，因此基于小干扰稳定性原理、以静稳定边界作判据的保护必然动作不理想；异步边界阻抗判据是一个下移j Xd′的等无功阻抗圆，它可以保证完全失磁后的发电机测量阻抗能进入该阻抗圆，但不能保证完全失磁之外的其它状态不会进入该阻抗圆，因此在系统电压短时下降或发电机突然甩负荷等情况下可能启动该保护使之误动。

Objective:To explore the feasibility of laparoscopy in diagnosing and treating of abdominal diseases.

目的：探讨腹腔镜用以诊断腹部外科疾病及选择治疗方案的可行性。

The lifetime of nylon 1010 and nylon 1010/POSS composites decreased with increasing temperature.

热重-红外联用分析表明尼龙1010在氮气气氛下的降解产物主要为小分子的低聚物，POSS并不改变尼龙1010降解产物的组成。