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您的检索式：作者名="Jinpeng Bi"
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| 1 | Numerical analysis and experimental research on detection of welding defects in pipelines based on magnetic flux leakage显示文摘Regular inspection of long-distance oil and gas pipelines plays an important role in ensuring the safe transportation of oil and gas,and inspection on welding defects is an important part of the inspection process.Magnetic flux leakage(MFL)is an electromagnetic non-destructive testing technique which has been commonly utilized to detect welding defects in pipelines.In the present study,Maxwell electro-magnetic simulation software was used to carry out numerical study on the welding defects in pipelines,including incomplete penetration and undercut.TheФ406 pipeline with a wall thickness of 7 mm was selected as the study case to establish the numerical model.Setting the life-off value at 1 mm,the distribution of magnetic leakage field was investigated for pipeline without defect,pipeline with incomplete penetration defect and pipeline with undercut defect respectively,the characteristic values describing the depth and width of defects were found.Furthermore,quantified equations which can be used to describe the defect depth were proposed.Finally,experimental research was carried out to validate the effectiveness of the numerical model,and the experimental results showed good consistence with the numerical calculation results.The research results indicate that,it is technically feasible and reliable to diagnose the incomplete penetration and undercut welding defects in pipelines using MFL. | Changsheng Zhang Jinpeng Bi Yuexia Lv Mengli Li Yongying Qi Kai Zhou Ming Zhang Tingting Du | 2023 | Petroleum Research2023，8，4： | 0 |
| 2 | 肢体骨肉瘤并发病理性骨折的保肢手术(英文)显示文摘Objective: The aim of this study was to report the oncological result of the treatment of 12 patients with osteosarcoma sustaining pathologic fracture. Methods: There were 9 male and 3 female patients, the average age was 17.6 years (ranged, 11–34 years). All patients received neoadjuvant chemotherapy, wide margin resection was achieved and skeletal reconstruction was done with locally designed and custom-manufactured prosthesis. Follow-up examination was carried out at an average of 36 months (range from 12–94 months). Results: Nine patients had survived and of these 8 patients were free from disease while one patient was alive with disease. The functional result (using the 30-point rating system of the Musculoskeletal Tumor Society) was excellent in three (25%), good in six (50%), fair in three (25%). Conclusion: The performance of a limb-salvage procedure in a patient with pathologic fracture, particularly for one that unites following chemotherapy, does not significantly increase the risk of local recurrence or survival. | Wenzhi Bi Yan Wang Gang Han Jinpeng Jia Wei Wang | 2009 | The Chinese-German Journal of Clinical Oncology2009，8，11： | 0 |
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