In view of the disadvantages of vibration safety monitoring technology for offshore wind turbines,a new method is proposed to obtain deformation information of towering and dynamic targets in real-time by the ground-b...In view of the disadvantages of vibration safety monitoring technology for offshore wind turbines,a new method is proposed to obtain deformation information of towering and dynamic targets in real-time by the ground-based interferometric ra-dar(GBIR).First,the working principle and unique advantages of the GBIR system are introduced.Second,the offshore wind turbines in Rongcheng,Shandong Province are selected as the monitoring objects for vibration safety monitoring,and the GPRI-II portable radar interferometer is used for the health diagnosis of these wind turbines.Finally,the interpretation method and key processing flow of data acquisition are described in detail.This experiment shows that the GBIR system can accurately identify the millimeter-scale vibration deformation of offshore wind turbines and can quickly obtain overall time series deformation images of the target bodies,which demonstrate the high-precision deformation monitoring ability of the GBIR technology.The accuracy meets the requirements of wind turbine vibration monitoring,and the method is an effective spatial deformation monitoring means for high-rise and dynamic targets.This study is beneficial for the further enrichment and improvement of the technical system of wind turbine vibration safety monitoring in China.It also provides data and technical support for offshore power engineering management and control,health diagnosis,and disaster prevention and mitigation.展开更多
OBJECTIVE: To conduct a review of the systematic reviews and meta-analyses on the Traditional Chinese Medicine(TCM) treatment of type 2 diabetes mellitus(T2DM).METHODS: We searched Pub Med, Cochrane, Web of Science, C...OBJECTIVE: To conduct a review of the systematic reviews and meta-analyses on the Traditional Chinese Medicine(TCM) treatment of type 2 diabetes mellitus(T2DM).METHODS: We searched Pub Med, Cochrane, Web of Science, Chinese Biomedical Literature Database(CBM), China National Knowledge Infrastructure(CNKI), China Science and Technology Journal Database(VIP), Wanfang, and other databases from database inception to May 2014 for systematic reviews and meta-analyses on TCM treatment of T2 DM. Manuscripts were read by two investigators if they met the inclusion criteria, and data were extracted. A Measurement Tool to Assess Systematic Reviews(AMSTAR) was used to classify research quality, and the evidence quality was graded by the Grade of Recommendation, Assessment, Development, and Evaluation(GRADE) system.RESULTS: Eighteen systematic reviews and meta-analyses were considered. Fifteen analyzed the efficacy of Chinese herbal medicines, and three investigated the efficacy of acupuncture. AMSTAR evaluation ranged from 3-10, and re-evaluation of the main results implied that treatment of T2 DM with TCM has certain advantages when compared with conventional Western medicine. However, the evidence quality was generally low.CONCLUSION: This work shows favorable evidence for the clinical treatment of TCM on T2 DM. However, it is recommended that evidence-based decisions are made based on clinical trials because of the GRADE scores of the studies. To achieve higher quality of clinical research, clinical research on TCM requires specific and suitable research methods. Further trials may increase the quality of evidence to evaluate the clinical efficacy of TCM for T2 DM.展开更多
基金This research was funded by the Public Science and Technology Research Funds Projects of Ocean(No.201405028)the Scientific Research Project of Shandong Electric Power Engineering Consulting Institute Co.,Ltd.(No.2020-059).
文摘In view of the disadvantages of vibration safety monitoring technology for offshore wind turbines,a new method is proposed to obtain deformation information of towering and dynamic targets in real-time by the ground-based interferometric ra-dar(GBIR).First,the working principle and unique advantages of the GBIR system are introduced.Second,the offshore wind turbines in Rongcheng,Shandong Province are selected as the monitoring objects for vibration safety monitoring,and the GPRI-II portable radar interferometer is used for the health diagnosis of these wind turbines.Finally,the interpretation method and key processing flow of data acquisition are described in detail.This experiment shows that the GBIR system can accurately identify the millimeter-scale vibration deformation of offshore wind turbines and can quickly obtain overall time series deformation images of the target bodies,which demonstrate the high-precision deformation monitoring ability of the GBIR technology.The accuracy meets the requirements of wind turbine vibration monitoring,and the method is an effective spatial deformation monitoring means for high-rise and dynamic targets.This study is beneficial for the further enrichment and improvement of the technical system of wind turbine vibration safety monitoring in China.It also provides data and technical support for offshore power engineering management and control,health diagnosis,and disaster prevention and mitigation.
基金Supported by the National Natural Science Foundation of China(No.30873307,81373749,81574071)the People Programme(Marie Curie Actions)of the European Union's Seventh Framework Programme under REA grant agreement(No.PIRSES-GA-2013-612589)
文摘OBJECTIVE: To conduct a review of the systematic reviews and meta-analyses on the Traditional Chinese Medicine(TCM) treatment of type 2 diabetes mellitus(T2DM).METHODS: We searched Pub Med, Cochrane, Web of Science, Chinese Biomedical Literature Database(CBM), China National Knowledge Infrastructure(CNKI), China Science and Technology Journal Database(VIP), Wanfang, and other databases from database inception to May 2014 for systematic reviews and meta-analyses on TCM treatment of T2 DM. Manuscripts were read by two investigators if they met the inclusion criteria, and data were extracted. A Measurement Tool to Assess Systematic Reviews(AMSTAR) was used to classify research quality, and the evidence quality was graded by the Grade of Recommendation, Assessment, Development, and Evaluation(GRADE) system.RESULTS: Eighteen systematic reviews and meta-analyses were considered. Fifteen analyzed the efficacy of Chinese herbal medicines, and three investigated the efficacy of acupuncture. AMSTAR evaluation ranged from 3-10, and re-evaluation of the main results implied that treatment of T2 DM with TCM has certain advantages when compared with conventional Western medicine. However, the evidence quality was generally low.CONCLUSION: This work shows favorable evidence for the clinical treatment of TCM on T2 DM. However, it is recommended that evidence-based decisions are made based on clinical trials because of the GRADE scores of the studies. To achieve higher quality of clinical research, clinical research on TCM requires specific and suitable research methods. Further trials may increase the quality of evidence to evaluate the clinical efficacy of TCM for T2 DM.
