Efficient and accurate detection of anomalies in photovoltaic(PV)strings is essential for ensuring the normal operation of PV power stations.Most existing studies focus on developing automated anomaly detection models...Efficient and accurate detection of anomalies in photovoltaic(PV)strings is essential for ensuring the normal operation of PV power stations.Most existing studies focus on developing automated anomaly detection models based on temporal abnormalities in PV strings.However,since analyzing anomalies often requires domain knowledge,existing automated methods have significant limitations in assisting experts to understand the causes and impact of these anomalies.In close collaboration with domain experts,this work has summarized the specific user requirements for PV string anomaly detection and designed PVeSight,an interactive visual analysis system to help experts discover and analyze anomalies in PV strings.We use dimensionality reduction techniques to generate string pattern map.These maps are used for anomaly detection,classifying anomalies,comparative analysis between strings,and hierarchical analysis under inverters and combiner boxes.This helps experts trace the causes of anomalies and acquire valuable insights into anomalous PV strings.Through case studies and expert evaluation,we verified the usability and effectiveness of PVeSight for PV string anomaly detection.展开更多
The infections in open fracture induce high morbidity worldwide.Thus,developing efficient anti-infective orthopedic devices is of great significance.In this work,we designed a kind of infection-responsive long-term an...The infections in open fracture induce high morbidity worldwide.Thus,developing efficient anti-infective orthopedic devices is of great significance.In this work,we designed a kind of infection-responsive long-term antibacterial bone plates.Through a facile and flexible volatilization method,a multi-aldehyde polysaccharide derivative,oxidized sodium alginate,was crosslinked with multi-amino compounds,gentamycin and gelatin,to fabricate a uniform coating on Ti bone plates via Schiff base reaction,which was followed by a secondary crosslinking process by glutaraldehyde.The double-crosslinked coating was stable under normal condition,and could responsively release gentamycin by the triggering of the acidic microenvironment caused by bacterial metabolism,owning to the pH-responsiveness of imine structure.The thickness of the coating was ranging from 22.0μm to 63.6μm.The coated bone plates(Ti-GOGs)showed infection-triggered antibacterial properties(>99%)and high biocompatibility.After being soaked for five months,it still possessed efficient antibacterial ability,showing its sustainable antibacterial performance.The in vivo anti-infection ability was demonstrated by an animal model of infection after fracture fixation(IAFF).At the early stage of IAFF,Ti-GOGs could inhibit the bacterial infection(>99%).Subsequently,Ti-GOGs could promote recovery of fracture of IAFF.This work provides a convenient and universal strategy for fabrication of various antibacterial orthopedic devices,which is promising to prevent and treat IAFF.展开更多
基金supported by NSFC(62421003,62402421,and U22A2032)Ningbo Yongjiang Talent Introduction Programme(2024A-399-G)。
文摘Efficient and accurate detection of anomalies in photovoltaic(PV)strings is essential for ensuring the normal operation of PV power stations.Most existing studies focus on developing automated anomaly detection models based on temporal abnormalities in PV strings.However,since analyzing anomalies often requires domain knowledge,existing automated methods have significant limitations in assisting experts to understand the causes and impact of these anomalies.In close collaboration with domain experts,this work has summarized the specific user requirements for PV string anomaly detection and designed PVeSight,an interactive visual analysis system to help experts discover and analyze anomalies in PV strings.We use dimensionality reduction techniques to generate string pattern map.These maps are used for anomaly detection,classifying anomalies,comparative analysis between strings,and hierarchical analysis under inverters and combiner boxes.This helps experts trace the causes of anomalies and acquire valuable insights into anomalous PV strings.Through case studies and expert evaluation,we verified the usability and effectiveness of PVeSight for PV string anomaly detection.
基金This work was supported by National Natural Science Foundation of China[Grant Nos.52122304,52073024 and 51873012]Beijing Outstanding Young Scientist Program[Grant No.BJJWZYJH01201910010024]Chinese Association of Rehabilitation Medicine Technology Development Project[Grant No.KFKT-2022-002].
文摘The infections in open fracture induce high morbidity worldwide.Thus,developing efficient anti-infective orthopedic devices is of great significance.In this work,we designed a kind of infection-responsive long-term antibacterial bone plates.Through a facile and flexible volatilization method,a multi-aldehyde polysaccharide derivative,oxidized sodium alginate,was crosslinked with multi-amino compounds,gentamycin and gelatin,to fabricate a uniform coating on Ti bone plates via Schiff base reaction,which was followed by a secondary crosslinking process by glutaraldehyde.The double-crosslinked coating was stable under normal condition,and could responsively release gentamycin by the triggering of the acidic microenvironment caused by bacterial metabolism,owning to the pH-responsiveness of imine structure.The thickness of the coating was ranging from 22.0μm to 63.6μm.The coated bone plates(Ti-GOGs)showed infection-triggered antibacterial properties(>99%)and high biocompatibility.After being soaked for five months,it still possessed efficient antibacterial ability,showing its sustainable antibacterial performance.The in vivo anti-infection ability was demonstrated by an animal model of infection after fracture fixation(IAFF).At the early stage of IAFF,Ti-GOGs could inhibit the bacterial infection(>99%).Subsequently,Ti-GOGs could promote recovery of fracture of IAFF.This work provides a convenient and universal strategy for fabrication of various antibacterial orthopedic devices,which is promising to prevent and treat IAFF.
