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Your search keyword '"Wei, Xin-Miao"' showing total 9 results
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9 results on '"Wei, Xin-Miao"'

7. Aircraft Detection Based on Multiple Scale Faster-RCNN

Author

Zijuan Luo and Wei Xin Miao

Subjects
Artificial neural network, Computer science, business.industry, Feature extraction, Region proposal, Pattern recognition, 02 engineering and technology, 01 natural sciences, Convolutional neural network, 010309 optics, Support vector machine, Robustness (computer science), 0103 physical sciences, NET Remoting, 0202 electrical engineering, electronic engineering, information engineering, 020201 artificial intelligence & image processing, Artificial intelligence, business, Recognition algorithm
Abstract

Remote sensing image recognition has been widely used in civil and military fieldsDIn view of plenty of interference factors in remote-sensing aircraftCsuch as shadeCnoiseCthe changing of perspectiveCetc. An improved target recognition algorithm in remote sensing image based on Faster-RCNN is proposed which uses a standard Region Proposal Network (RPN) generation and incorporates feature maps from shallower convolution feature maps. Convolution neural network is adopted to recognize aircraft target in complex environment , enhance the global context and local information to avoid information loss in the process of feature extractionCwhich improves recognition rate. Simulation results show that the feasibility of aircraft target recognition algorithm in remoting sensing image and the scale and posture changes of target can be overcome.MeanwhileCthe proposed algorithm has higher recognition effect and stronger robustness than traditional Faster-RCNN and BP neural network and support vector machine ( SVM) methods.

Published
2018

9. [Clinical analysis of pediatric SARS cases in Beijing].

Author

Li ZZ, Shen KL, Wei XM, Wang HL, Lu J, Tian H, Sun GQ, Zeng JJ, Hu YH, Zhao SY, Yin J, Feng XL, Jiang ZF, and Yang YH

Subjects
Adolescent, Child, Child, Preschool, China, Female, Humans, Infant, Male, Radiography, Severe Acute Respiratory Syndrome therapy, Severe Acute Respiratory Syndrome virology, Treatment Outcome, Antibodies, Viral blood, Severe acute respiratory syndrome-related coronavirus immunology, Severe Acute Respiratory Syndrome pathology
Abstract

Objective: To study clinical characteristics of pediatric SARS cases in Beijing., Methods: Eighteen pediatric cases with SARS diagnosed on admission were analyzed. The cases were admitted to Beijing Children's Hospital and Ditan Hospital (pediatric ward) from April 8 to May 12., Results: The 18 children aged 5 months to 15 years (10 male and 8 female) had epidemiologically linked findings. Fourteen cases had close contact with SARS patients. Four cases were living in the community where adult SARS patients were found. All the 18 patients but one presented with fever and cough. Most of them had high fever, 2 cases had bradycardia, 2 had diarrhea, and another 2 had tachypnea. Malaise and headache were noted only in 3 cases respectively which were much less frequently seen than in adult patients. Symptoms and signs of the children were much less severe and aggressive than adults cases. Thirteen children had chest radiographic consolidation. Of them, 9 cases had progressive changes after admission, then improved quickly. We did not find significant lower hemoglobin and platelet levels. Most patients had leukopenia and lymphopenia. Serologic test was performed for 15 cases and 8 were positive for SARS virus-IgG and 6 for IgM antibody. Of the 4 cases who had close contact with SARS adults and without chest radiograph abnormal findings, 3 were negative for SARS virus-antibodies. Part of the patients had temporary abnormality of myocardial enzyme and liver function. All these children finally had rapid improvement on chest radiograph. The patients were treated with antiviral agents and corticosteroid. Only two cases required oxygen therapy. No child needed assisted ventilation and no death, nor lung fibrosis occurred. After hospitalization, all patients were improved and discharged when this paper was being written. The average hospital stay of these patients was 14.6 days (6 - 22 days)., Conclusion: Compared with adults, pediatric SARS patients seemed to have their own clinical characteristics. The disease in children had lower severity and infectivity than that in adults. The mechanisms of the disease in children should be studied in well-designed clinical trials. Cases like the 4 children who had close contact with SARS adult patients but without chest radiographic changes deserve further studies with the help of more reliable and sensitive etiologic tests.

Published
2003

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