Background This study aims at addressing the lack of closed-loop feedback optimization enabling tool in aircraft automatic spraying systems;we systematically analyze a three-dimensional(3D)virtual-real mapping techniq...Background This study aims at addressing the lack of closed-loop feedback optimization enabling tool in aircraft automatic spraying systems;we systematically analyze a three-dimensional(3D)virtual-real mapping technique,namely the digital twin technique,used by the automatic spraying system.Methods With the sensors installed in the spraying system,the spraying working parameters are collected online and are used for driving the 3D virtual spraying system to realize the total-factor monitoring of the spraying operation.Furthermore,the operation-evaluation model is applied for analyzing and managing the key indexes of the spraying quality;once the data value of the key indexes exceeds a threshold,the operation shall be optimized automatically.Results This approach can effectively support the high-efficiency analysis,evaluation,and optimization of the spraying process.展开更多
Objective:The aim of this study was to investigate the effect of polycyclic aromatic hydrocarbons (PAHs) on the occurrence of human pancreatic cancer.Methods:PAHs in human pancreatic cancer,adjacent pancreatic cancer ...Objective:The aim of this study was to investigate the effect of polycyclic aromatic hydrocarbons (PAHs) on the occurrence of human pancreatic cancer.Methods:PAHs in human pancreatic cancer,adjacent pancreatic cancer tissues and tissues without pancreatic cancer were extracted by ultrasonic extraction (UE).And then the extracts were cleaned up by solid phase extraction and analyzed by high performance liquid chromatography (HPLC) with fluorescence spectroscopy.Results:Four kinds of PAHs were detected,which were chrysene,2-methylanthracene,pyrene and benzo (a) pyrene.The contents of the four PAHs were not statistically significant between pancreatic cancer and adjacent tissues (P > 0.05).The contents of 2-methylanthracene,pyrene and benzo (a) pyrene in pancreatic cancer and adjacent tissues were higher than tissues without pancreatic cancer,the differences were statistically significant (P < 0.05).The contents of chrysene in the three kinds of pancreatic tissues were not statistically significant (P > 0.05).Conclusion:PAHs were found in human pancreatic tissues.Human pancreatic tissues have extremely strong ability of bio-concentrating PAHs.PAHs might play an important role in the occurrence of human pancreatic cancer.展开更多
基金Sichuan Civil-Military Inosculation Special Fund(ZYF-2017-66).
文摘Background This study aims at addressing the lack of closed-loop feedback optimization enabling tool in aircraft automatic spraying systems;we systematically analyze a three-dimensional(3D)virtual-real mapping technique,namely the digital twin technique,used by the automatic spraying system.Methods With the sensors installed in the spraying system,the spraying working parameters are collected online and are used for driving the 3D virtual spraying system to realize the total-factor monitoring of the spraying operation.Furthermore,the operation-evaluation model is applied for analyzing and managing the key indexes of the spraying quality;once the data value of the key indexes exceeds a threshold,the operation shall be optimized automatically.Results This approach can effectively support the high-efficiency analysis,evaluation,and optimization of the spraying process.
基金Supported by agrant from Key Laboratory of Marine SpillOil Identification and Damage Assessment Technology (No. 200902)
文摘Objective:The aim of this study was to investigate the effect of polycyclic aromatic hydrocarbons (PAHs) on the occurrence of human pancreatic cancer.Methods:PAHs in human pancreatic cancer,adjacent pancreatic cancer tissues and tissues without pancreatic cancer were extracted by ultrasonic extraction (UE).And then the extracts were cleaned up by solid phase extraction and analyzed by high performance liquid chromatography (HPLC) with fluorescence spectroscopy.Results:Four kinds of PAHs were detected,which were chrysene,2-methylanthracene,pyrene and benzo (a) pyrene.The contents of the four PAHs were not statistically significant between pancreatic cancer and adjacent tissues (P > 0.05).The contents of 2-methylanthracene,pyrene and benzo (a) pyrene in pancreatic cancer and adjacent tissues were higher than tissues without pancreatic cancer,the differences were statistically significant (P < 0.05).The contents of chrysene in the three kinds of pancreatic tissues were not statistically significant (P > 0.05).Conclusion:PAHs were found in human pancreatic tissues.Human pancreatic tissues have extremely strong ability of bio-concentrating PAHs.PAHs might play an important role in the occurrence of human pancreatic cancer.
