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27 results on '"Liu, Tian-Hu"'

4. Intelligent Bamboo Part Sorting System Design via Machine Vision

Author

Liu, Tian-Hu, Li, Gui-Qi, Wu, Zi-Di, Wang, Hong-Jun, Wu, Jin-Meng, Chen, Qin-Ling, Zhang, Di, Nie, Xiang-Ning, and Liu, Wei

Subjects
Sorting devices -- Design and construction -- Technology application, Bamboo -- Production processes, Machine vision -- Usage, Technology application, Business, Forest products industry
Abstract

The defect rate of initially produced block bamboo (Bambusoideae) parts is >20 percent. Sorting out these defective parts manually is a highly time-consuming and tedious process. An intelligent sorting system was developed based on machine vision using a Radial Basis Function (RBF) neural network learning algorithm in this study. First, a high-speed charge-coupled device camera was used to obtain a series of images of perfect and defective block bamboo parts. Next, the RBF neural-network learning algorithm was applied to obtain defect characteristics and to locate defective parts moving forward on a conveyor belt. An array of air jets was designed to force defective parts off the belt. Experimental results showed that the average defective part removal rate of the proposed system was 91.7 percent., Bamboo (Bambusoideae) is commonly distributed throughout the Asia-Pacific region, Americas, and Africa, as shown in Figure 1. In Asia, bamboo plants are mainly distributed in China, India, and other developing [...]

Published
2021
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11. An infant with a mild SARS-CoV-2 infection detected only by anal swabs: a case report

Author

Li,Juan, Feng,Jing, Liu,Tian-hu, Xu,Feng-cheng, and Song,Guo-qiang

Subjects
Anal swab, stomatognathic system, Severe acute respiratory syndrome coronavirus 2, Baby
Abstract

Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) emerged in Wuhan, China and has spread rapidly worldwide. We present a mild SARS-CoV-2 infection in a baby with non-productive cough and normal chest computed tomography, in whom only anal swabs tested positive by real-time PCR testing for SARS-CoV-2. She was given atomization inhalation therapy with recombinant human interferon alfa-1b for 10 days. Her anal swabs remained positive for eight days, whereas her throat swabs were persistently negative by real-time PCR testing. Mild and asymptomatic cases, especially in children, might present with PCR negative pharyngeal/nasal swabs and PCR positive anal swabs. Those patients are potential sources of infection via fecal-oral transmission for COVID-19.

Published
2020

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