搜索结果: 1-13 共查到“工学 grading”相关记录13条 . 查询时间(0.156 秒)
GIS-BASED FUZZY COMPREHENSIVE EVALUATION OF FOREST FIRE-POTENTIAL ZONE-GRADING
Forest Fire-danger Division Scale Fuzzy Comprehensive Evaluation Subordinate Function Expert Evaluation Methodlogy GIS Visual Basic
2016/3/17
Forest fire-potential is natural disaster that breaks out strongly , destructs largely and is difficult to dispose and rescue, its destructive power has a serious threat to the security ofsociety and ...
粮食收购品质自动评定装置设计与试验（Design and Experiment of Automatic Quality Grading Equipment in Grain Purchase）
粮食收购 品质评定 杂质
2010/12/28
设计了一种粮食收购品质自动评定装置。采用电容法测量粮食含水率，真空负压法测量容积密度，该装置能够自动检测收购粮食的杂质、含水率和容积密度等重要指标，并对其进行分级。试验结果表明，该装置杂质分离纯净度达99.5%，重复误差不大于0.3%；含水率测量误差在±0.5%以内，重复误差小于0.2%；容积密度测量重复误差小于3g/L。
鲜食玉米果穗外观品质分级的计算机视觉方法（Appearance Quality Grading for Fresh Corn Ear Using Computer Vision）
鲜食玉米 果穗 外观品质 分级
2010/12/28
在HSI颜色模型下，通过计算机视觉检测技术实现对鲜食玉米果穗外观品质分级。提出垂直投影法确定秃尖位置并去除秃尖。对H值进行双向一次微分运算以实现缺陷的识别。在此基础上获取果穗缺陷比、穗长、果穗最大直径、长宽比和矩形度作为外观品质特征参数，并以此为输入向量构建广义回归神经网络对果穗外观品质分级。试验结果表明：秃尖位置、穗长和果穗最大直径的平均误差分别为2.27mm、1.96mm和0.54m...
提出了一种基于计算机视觉技术的山竹大小和颜色分级方法。针对以蓝色滚子为背景的山竹图像，在RGB色彩空间使用双阈值对图像进行初步分割；然后通过形态学运算、轮廓跟踪、区域填充提取出整个山竹目标；最后由颜色因子2G-R-B和G识别出果柄、果蒂和果皮。由果柄、果蒂区域形心和果皮区域形心位置判断水果的姿态，提取水果的最大横径作为大小分级指标；在HIS颜色空间以果皮区域的饱和度S和色调H的差值作为颜色分级指标...
Effects of Forest Management Using Pruning and Thinning on Wood Quality and Strength Properties of Sugi Planted in Shimane Prefecture II.Relationship between forest management, and visual grading and bending properties of boxed-heart square timbers
planted sugi trees forest management visual grading bending properties
2009/11/23
The aim of this study was to clarify the effects of forest management such as pruning and thinning on the visual grading and bending properties of boxed-heart square timbers of sugi (Cryptomeria japon...
基于粗糙集的烤烟烟叶智能分级方法（Intelligent Grading of Flue-cured Tobacco Leaves Based on Rough Set Theory）
烤烟烟叶 分级 化学指标
2009/8/11
针对烤烟烟叶的分级问题，提出了一种基于粗糙集理论的智能分级方法。为了适应烟叶分级的特点，将粗糙集理论予以扩展和改进，给出了相应的离散化和属性约简算法。同时构造了烟叶分组、分级的二级推理模型，以实现合理粒度的知识获取。通过烟叶的化学指标进行“部位”和“颜色”上的并行分组，可得到各自的推理规则以及影响指标和相应的重要度。在规则推理获得烟叶的分组后，借助所有化学指标的重要度进行多属性决策判定得到烟叶的分...
A numerical grading system has been established forwhite gold alloys using the ASTM Yellowness IndexD1925, an existing colour quality standard. The Index iscalculated from the CIE (International Commi...
基于计算机视觉的葡萄检测分级系统（Grape Inspection and Grading System Based on Computer Vision）
葡萄 分级 计算机视觉 图像处理
2010/4/1
设计了一套基于计算机视觉的葡萄检测分级系统，包括驱动装置、输送机构、夹持机构、图像采集与处理系统和分级控制系统，葡萄以悬挂方式连续输送，两个CCD摄像机在外触发模式下实时采集葡萄的两面图像。基于RGB色彩空间计算果面着色率，采用投影面积法和果轴方向投影曲线计算果穗大小和形状参数，进而实现葡萄外观品质分级。选用20穗巨峰葡萄进行3次分级试验，与人工分级对比，颜色和大小形状分级的准确率分别为90%和8...
基于计算机视觉的马铃薯自动检测分级（Automatic Detecting and Grading Method of Potatoes with Computer Vision）
马铃薯 分级 计算机视觉
2009/5/22
根据大小特性，采用改进的果径法进行马铃薯的大小分级；根据外形特性，采用离心率法进行马铃薯的形状分级；根据颜色特性，采用灰度值差值法检测发芽马铃薯；根据边界特性，采用相邻采样边界点归一化半径差的方法检测畸形马铃薯，并实现了马铃薯在线综合检测分级。检测试验结果表明：系统分级结果比较稳定，分级精度达到88.0%。
基于计算机视觉和神经网络的牛肉颜色自动分级（Automatic Color Grading of Beef Lean Tissue Based on BP Neural Network and Computer Vision）
牛肉 颜色 分级 神经网络
2009/5/22
将采集的牛胴体眼肌切面图像人工确定其颜色等级，然后通过计算机图像处理方法，分割出肌肉区域并提取出其在RGB和HIS颜色空间的颜色特征参数。设计一个以牛肉的颜色特征参数为输入、牛肉的颜色等级为输出的BP神经网络模型，通过训练，确定模型的结构参数，用测试样本对该模型进行验证。结果显示，用该模型进行牛肉颜色等级预测的正确率可达95%，耗时仅0.25s。表明利用所设计的模型可以对牛肉的颜色等级进行快速、准...
Quantitative Grading of Spun Yarns for Appearance
Yarn appearance Optical yarn diameter Yarn grade Objective yarn grading system
2009/4/22
The general appearance of a yarn is one of the primary qualities affecting its commercial value. The method of grading spun yarns by subjective visual examination has long been recognized as a practi...
The Comparison of the Manual and CAD Systems for Pattern Making, Grading and Marker Making Processes
development of CAD functions of CAD model complexity pattern making
2009/2/11
The objective of this research is to conduct a comparison in pattern and marker making between the CAD and manual methods as regards individual course steps and total time values, and to determine the...
Computer-Assisted Generation and Grading of Pharmacokinetics Assignments in a Problem-Solving Course
Computer-Assisted Generation Grading Pharmacokinetics Assignments Problem-Solving Course
2016/3/14
Computer-generated practice problems (with opportunity for unlimited practice) and assignments (with automatic grading by computer) were developed for a problem-solving course in basic pharmacokinetic...