li hua ( 1907-1994) is one of the great leaders of new woodblock prints movement, and also a very important print-maker, art historian and art educationist.

it should be necessary for prints artists to pay attention to spiritual connotation in the beginning of the 21st century.

21世纪初期将是版画家侧重版画精神内涵的必要时期。

互联网摘选

just as an artist

作为艺术家的版画家

互联网摘选

dong qizhong, an engraving painter from loess plateau to the world

从黄土高原走向世界的版画家董其中

互联网摘选

It introduced differential surface geometry as the theoretical base of free-form parameterized surface shape analysis, summed up the analysis techniques, analyzed the characteristics of the surface analysis tools in some well-known CAD software packages, and showed their lack of capabilities in globally analyzing surface shapes.

介绍了自由曲面形状分析理论.曲面微分几何，总结了自由曲面形状分析技术手段，对著名CAD软件中曲面分析工具特点进行了简要分析，指出了它们对曲面全局形状分析能力的不足。

互联网摘选

We give some Liouville type theorems of harmonic maps which solve some free boundary problems.

本文给出一类带由边界的调和映射的Liouville型定理，这种类型的定理在微分几何的一些问题中有十分重要的应用。

互联网摘选

Furthermore, the k-Hessian equation itself has been playing an important role in differential geometry and some applied sciences. Thus it is of great worth to study the k-Hessian equation.

另外，k-Hessian方程本身对于微分几何，及许多应用科学也有重大的意义，因此，对k-Hessian方程的研究是很有价值的。

互联网摘选

Chapter 2 introduces some propaedeutics of classic differential geometry, which include the first basic form, the second basic form, normal curvature, main curvature, mean curvature, Gauss curvature, unit normal vector, main vector, etc.

第二章介绍一系列的预备知识，主要是关于古典微分几何中第一，第二基本形式的定义，法曲率，主曲率，平均曲率，Gauss曲率，单位法向量，主方向等的定义。

互联网摘选

Through the in-depth study of the differential geometrical relationship between the 2D graph and 3D graph, the shape of the 3D workspace surface was obtained by enveloping the boundary curve of every layer along the z-axis direction.

通过深入地研究二维、三维图形的微分几何关系，在沿z方向得到每一层的边界曲线基础上，采用曲线包络的方法得到了三维工作空间曲面的形状。

互联网摘选

A formula is developed to calculate 3-D radiation field of antennas on the finite truncated cone-cylinder by applying the UTD and differential geometry.

本文以微分几何为工具，应用一致性几何绕射理论（UTD），导出了有限长金属圆锥柱侧天线三维辐射场的计算公式。

互联网摘选

We utilize the curvature κ, torsion r, Frenet frame in differential geometry.

在微分几何中我们主要利用曲率κ，挠率τ和Frenet标架等来考虑。

互联网摘选

The concept of tensors was introduced by Gauss, Riemann and Christoffel, etc., in the 19th century in the study of differential geometry.

张量的概念是十九世纪由Gauss，Riemann和Christoffel等在微分几何的研究中提出的。

互联网摘选

Establish geometry model of hyperboloid clutch with rollers with differential geometry. We know that the line of tangent is beeline and validate it with Matlab.

利用微分几何相关知识建立了内外环的双曲面等距曲面及滚柱的几何模型，求解出其接触线为直线并用MATLAB进行了理论验证。

互联网摘选

Using the differential geometry property of edge points, an automatic segmentation algorithm is presented to extract the D0, D1 and D2 edge strips from noisy data.

利用边界点的微分几何特征，提出散乱点云自动分割方法，有效提取噪声点云的D0、D1和D2边界带。

互联网摘选

This article proposes a non-decoupling three dimensional ( 3D) robust guidance law by combining the advantages of the differential geometry control and Lie-group control methods.

结合微分几何和李群方法的优点，设计了一种非解耦的新型三维（3D）制导律。

互联网摘选

Differential Geometric Method and Inverse System Method Applied to TCSC Stability Control

微分几何法与逆系统法在TCSC稳定控制中应用

互联网摘选

Lie triple systems arose initially in studies of Riemannian geometry;

李三系源于微分几何中黎曼对称空间、全测地流形；

互联网摘选

This dissertation studies stability and H_ ∞, control problems for classes of switched nonlinear systems. Lyapunov function method and differential geometry method are two major methods adopted in the study.

本论文主要使用Lyapunov函数方法，微分几何方法研究几类非线性切换系统的稳定性及H∞控制问题。

互联网摘选

A Differential Geometrical Approach for the Solution of KdV Equations

解KdV方程的微分几何方法

互联网摘选

Put forward Riemannian metric-based nearest center neighbor classifier ( RMNCC) on the basis of differential geometry, correlating the feature extraction based on PCA and ICA and classification in radar target recognition on the foundation of mathematics.

针对PCA、ICA特征提取方法，基于微分几何的数学理论，综合考虑了雷达目标距离像识别中的特征提取与分类识别，提出基于黎曼度量的最近中心邻分类器。

互联网摘选

Chaotic Colpitts oscillator systems are studied by using the theories of differential geometry and nonlinear control systems.

利用微分几何和非线性系统控制理论，研究由控制输入驱动的混沌Colpitts振荡器系统的控制问题。

互联网摘选