defective wood

Automatic wood defects recognition based on texture extraction and support vector machine technology

基于纹理提取和SVM技术的自动木材缺陷识别

This paper first defined gray morphology filtering methods based on mathematical morphology, followed with examples of a wood defect image treated before and after open, as well as closed, filtering treatments.

介绍数学形态学中的灰度形态滤波方法,给出对木材缺陷图像进行闭、开运算处理后的仿真图像实例,利用木材缺陷图像截面灰度分布对处理效果进行分析。

Effects of dilation angle on failure process and mechanical behavior for rock specimen with random material imperfections;

扩容角对初始随机材料缺陷岩石试样破坏过程及力学行为的影响

For heterogeneous rock with initial random material imperfections in plane strain compression,the effects of end-restraint on the failure process and the stress-strain curve are numerically modeled,using FLAC.

平面应变岩样在单方向施加载荷条件下,采用拉格朗日元法(FLAC)模拟了端面约束对具有初始随机材料缺陷的岩样破坏过程及应力-应变曲线的影响。

In uniaxial plane strain compression,the failure processes,precursors,acoustic emissions and overall deformational characteristics of rock specimens with initially random material imperfections were modeled using FLAC.

在平面应变压缩条件下,采用FLAC模拟峰后脆性对含初始随机材料缺陷的岩样的破坏过程、前兆、声发射及全部变形特征的影响。

Numerical simulation of influence of material imperfection on strain localization;

材料缺陷对岩样变形局部化影响的数值模拟

Effects of positions of material imperfection at right edge of rock specimen under plane strain compression on initiation and evolution of shear bands as well as stress-strain curves of rock specimen were modeled numerically by FLAC.

在平面应变压缩条件下,通过在岩样左边界靠近下端面的位置及右边界的不同位置预制材料缺陷,采用拉格朗日元法研究了材料缺陷位置不同时的剪切带图案启动、演变及试样的宏观力学行为。

Study on Wood Defects Testing Based on Artificial Neural Network;

基于人工神经网络的木材缺陷检测研究

Wood Defect Image Segmentation Based on HSI Three Independent Characters

基于HSI三分量独立性木材缺陷图像分割

Automatic wood defects recognition based on texture extraction and support vector machine technology

基于纹理提取和SVM技术的自动木材缺陷识别

The Mechanism of Detecting Defects in Timber Using Ultrasonic Test Based on Wavelet Neural Networks;

基于小波神经网络木材缺陷类型超声检测机理的研究

Defects in logs

GB/T155-1995原木缺陷

Research on Identification Methods of Wood Surface Defects Based on Texture Features;

基于纹理特征的木材表面缺陷识别方法的研究

Research on Wood Surface Defect Detection Based on Fractal Theory;

基于分形理论木材表面缺陷识别的研究

Ultrasonic Quantitative Testing of Wood Hole-Defect Based on Energy Method;

基于能量法木材孔洞缺陷的超声定量检测研究

Research on Wood Surface Defect Detection Based on Computer Vision;

基于计算机视觉木材表面缺陷检测方法研究

Diagnoses internal defects of wood with stress wave tomography

三种应力波断层成像诊断木材内部缺陷

Pattern Recognition of Wood Material Defects Using Wavelet and Artificial Neural Network

基于小波神经网络的木质材料缺陷模式识别

Study on Types and Distribution of Visual Characteristics about Chinese Fir Dimension Lumbers

杉木目测分等规格材缺陷类型及分布的研究

WAVELET ANALYSIS ON DEFECT SIGNALS OF WOOD COMPOSITE MATERIALS BASED ON MATLAB PROGRAMMING

基于MATLAB编程的木质复合材料缺陷信号小波分析

Defects in sawn timber

GB/T4823-1995锯材缺陷

The Researching of Means of Wood Surface Defect Pattern Feature Taken by Image Processing

木材表面缺陷模式特征提取的图像处理方法研究

Theory and Technology of Detecting Inner-Defects in Wood with a Probing Drill Device;

压阻式木材内部缺陷类无损检测理论与技术的研究

The Study of Wood Stress Rating and Defect Testing Based on Vibration Method;

基于振动法进行木材应力分等和缺陷检测的研究

Comparing Studies between Stress-Wave and Ultrasonic in Inner Defect Wood;

应力波与超声波在木材内部缺陷检测中的对比研究