查询词典 null character

In addition, we show that if the distortion factor in the pinhole camera model is null, then the fundamental matrix can be linearly determined by only these 4 coplanar correspondences.

另外 ，如果摄像机不是 5参数模型，而是 4参数模型，则此时仅使用该 4对共面对应点即可线性确定基本矩阵。

Different from the traditional approach of solving GDA by singular value decomposition,the new algorithm utilizes kernel modified Gram-Schmidt orthogonalization algorithm to extract the optimal transformation matrix directly,which can not only effectively hold the most discriminant information in the null space of within-class scatter matrix,but also make the solution more stable in numeric.

与传统用奇异值分解获取目标特征子空间的方式不同，新算法运用核修正格兰-施密特正交化过程直接提取最优投影变换矩阵，不仅有效地地保留了类内散度矩阵最具辨别力的零空间信息，同时使所求解在数值上更稳定。

ABSTRACT In this dissertation, fault-tolerance of redundant manipulators is thoroughly investigated. First, inherent relationship between the dexterity and fault-tolerance of single-redundancy manipulator is discussed. Both the manipulability and the relative manipulability are utilized for measuring the kinematic fault-tolerance of the manipulator with one joint failure. Furthermore, the relative manipulability is used for measuring dexterity loss resulted by one joint failure, and the relationship between the fault-tolerance measurement and null space vector of Jacobian matrix is established.

本文对冗余自由度机器人的答错性问题进行了深入的分析和迭付：首先研究了单冗余度机器人运动学灵活性与容错性之间的内在关系，提出以故障构形的可操作度和相对可操作度来度量机器人的运动学容错性，用相对可操作度来度量关节故障给机器人操作灵巧性造成的损失，并建立了容错性度量指标与Jacobian矩阵零空间向量之间的关系。

In this paper, an improved null space LDA method based on DCT is proposed to solve both problems.

该文提出一种基于DCT的改进零空间LDA方法，能够解决以上两个问题。

Each parameter defined in the get method can be null.

get方法中定义的每个参数可以为null。

This method returns null if no resource with this name is found.

如果文件不存在，返回null；如果存在，就打开为InputStream。

First, by redefining the within class scatter matrix and the between class scatter matrix, a new null space method was presented.

首先，通过重新定义样本的类内散布矩阵和类间散布矩阵，提出了一种新的零空间法。

Then, combined the new null space method with F-LDA algorithm, a completely new feature extraction algorithm for face recognition was given.

然后把这种新的零空间法与F-LDA算法相结合，得到一种对人脸识别更有效的特征提取方法。

The method returns null for territories that dont have a currency, such as antarctica.

对于没有货币的领域，比如南极洲，方法返回null。

Upon this, we forward more deeply: the emergence of the null phenomenon and the removal method of it; the operator selection in Genetic algorithm; improvement of object function and the introduction of the punishment method, etc.

在此基础上，本文进行了深入的专题研究：零空间现象形成的原因及消除方法；遗传算法中选择操作的研究；目标函数的改善，惩罚机制的介入等，并取得了一系列的成果。

But GST= 0.156, Nm=1. 588. As a result, the foundation of Youyongchi Avicennia marina population was the result of the migration of hypocotyles and human factors.

这项工作可以为海岸防护林中新引进种类的判定以及为研究种群建立者效应方法的确定提供科学依据。

The two-dimensional CDRC-ADI-FDTD update equations for collision unmagnetized plasma are induced. The unconditional stability of the CDRC-ADI-FDTD formulation for collision unmagnetized plasma is obtained by the examples.

推导了碰撞非磁化等离子体中的二维CDRC-ADI-FDTD迭代公式，并用算例验证了碰撞非磁化等离子体CDRC-ADI-FDTD算法也是无条件稳定的。