Results 111 to 120 of about 1,306,141 (142)

基于图像边缘特征的零件分类与定位算法

, 2018
本论文提出了一种基于图像边缘特征的零件分类与定位算法。算法首先对图像腐蚀膨胀等预处理,然后通过边缘检测得零件的完整边缘轮廓,然后对零件边缘轮廓图像使用方向梯度直方图(HOG)构造训练数据,并采用支持向量机(SVM)在训练数据上训练分类识别模型,最后进行检测。根据检测结果获得图像中零件的种类和位置信息,然后使用棋盘格标定的方法来确定深度。标定时,取标定板上的两个点来计算深度,根据已知的深度,获取实际抓取点的两个图像坐标系的x,y值,计算世界坐标系坐标。此系统能解决零件分类、定位问题 ...
徐显兵, 王少剑, 肖江剑, 卜伟, 潘江锋, 彭成斌   +5 more
core  

[A segmented backprojection tensor degradation feature encoding model for motion artifacts correction in dental cone beam computed tomography]. [PDF]

Nan Fang Yi Ke Da Xue Xue Bao
Zeng Z, Wang Y, Lin Z, Bian Z, Ma J.
europepmc   +1 more source

[A comparative study of 3.0T (1)H-MRS for varying degrees of liver fibrosis in cynomolgus monkeys]. [PDF]

Zhonghua Gan Zang Bing Za Zhi, 2020
Ding K, Liu MR, Huang RS, Lu SJ, Wei X, Wei XX.   +5 more
europepmc   +1 more source

The question about the numerical value and quantitative data transfer of implant prosthodontics-orom experience guidance to digital guidance. [PDF]

Hua Xi Kou Qiang Yi Xue Za Zhi, 2021
Yu HY.
europepmc   +1 more source

[Expert consensus on artificial intelligence-assisted data acquisition and clinical application in electronic nasopharyngolaryngoscopy]. [PDF]

Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi
Li Y, Ye B, Sun K.
europepmc   +1 more source

[Microfluidic strategies for separation and analysis of circulating exosomes]. [PDF]

Se Pu, 2021
Chen W, Gan Z, Qin J.
europepmc   +1 more source

低零值盘型悬式瓷绝缘子发热机理研究

Dianci bileiqi
绝缘子发热是运作中较为常见的缺陷，尤其是盘型悬式瓷绝缘子串持续发热，往往会在较短的时间内发生贯通性击穿，进而引起瓷绝缘子爆裂故障。针对该现象，以某220 kV变电站盘型悬式瓷绝缘子发热、爆裂故障展开归一化研究，通过等值盐密、绝缘电阻、耐压试验等技术手段，发现发热的瓷件均为低（零）值绝缘子，并在宏观检查中发现发热和爆裂的绝缘子，钢帽和盘型瓷件连接处（即颈部位置）断面均存在裂纹，且钢帽内水泥胶合剂存在水分子侵入疏松痕迹，考虑内嵌瓷件受内外圈水泥胶合剂的内挤外压力作用 ...
孙庆峰, 刘高明, 金江舟, 周平, 鲁旷达, 刘学广   +5 more
doaj  

Preoperative CT radiomics<b>-</b>based model for predicting Ki<b>-</b>67 expression in clear cell renal cell carcinoma patients. [PDF]

Zhong Nan Da Xue Xue Bao Yi Xue Ban
Yang Z, He H, Zhang Y, Wang J, Zhang W, Zhou F.   +5 more
europepmc   +1 more source

[Texture analysis of diffusion-weighted magnetic resonance imaging to identify atypically enhanced small hepatocellular carcinoma and dysplastic nodules under the background of cirrhosis]. [PDF]

Zhonghua Gan Zang Bing Za Zhi, 2020
Zhong X, Li JS, Chen ZJ, Yin JX, Gui S, Sun ZQ, Tang HS.   +6 more
europepmc   +1 more source

[Policy logic and multiple challenges of meal assistance services for older adults under the goal of healthy aging]. [PDF]

Beijing Da Xue Xue Bao Yi Xue Ban
Pan W, Chen L, Zhang X, Zhang H, Min H, Lei X, Sun X, Zhang X.   +7 more
europepmc   +1 more source