Closed-loop neuromodulation,especially using the phase of the electroencephalography(EEG)rhythm to assess the real-time brain state and optimize the brain stimulation process,is becoming a hot research topic.Because t...Closed-loop neuromodulation,especially using the phase of the electroencephalography(EEG)rhythm to assess the real-time brain state and optimize the brain stimulation process,is becoming a hot research topic.Because the EEG signal is non-stationary,the commonly used EEG phase-based prediction methods have large variances,which may reduce the accuracy of the phase prediction.In this study,we proposed a machine learning-based EEG phase prediction network,which we call EEG phase prediction network(EPN),to capture the overall rhythm distribution pattern of subjects and map the instantaneous phase directly from the narrow-band EEG data.We verified the performance of EPN on pre-recorded data,simulated EEG data,and a real-time experiment.Compared with widely used state-of-the-art models(optimized multi-layer filter architecture,auto-regress,and educated temporal prediction),EPN achieved the lowest variance and the greatest accuracy.Thus,the EPN model will provide broader applications for EEG phase-based closed-loop neuromodulation.展开更多
Acute appendicitis is the most common surgical emergency that we encounter. Adynamic Intestinal obstruction due to appendicitis or its complication may be seen time and often. Mechanical obstruction because of appendi...Acute appendicitis is the most common surgical emergency that we encounter. Adynamic Intestinal obstruction due to appendicitis or its complication may be seen time and often. Mechanical obstruction because of appendicitis is uncommon and even rarer for a closed loop obstruction to occur. Although it was described as early as 1901, very few cases have been reported. We report the case of a 20 years male who presented with generalized colicky pain abdomen, abdominal distension, vomiting and obstipation for three to four days. Vital signs were stable. His abdomen was distended and peritonitic, especially in the right iliac fossa. Rest of the physical examination was unremarkable. Blood tests were normal except for leucocytosis with neutrophilia. An abdominal X-ray finding was indicating a small bowel obstruction. A midline laparotomy was performed. On intraoperative examination, distended loops of small bowel from the jejunum to the distal ileum was observed, and a constricting ring around the terminal ileum created by a phlegmonous appendicitis with its tip adherent to the root of mesentery was found, obstructing an edematous loop of small bowel without signs of ischemia. As the bowel was viable simple appendectomy was done. Postoperatively, he had an uneventful recovery and was discharged after 3 d.展开更多
In order to construct a resource-saving and environment- friendly society, the advantages of radio frequency identification （RFID） were considered. And it put forward the idea of introducing RFID in the recycling ac...In order to construct a resource-saving and environment- friendly society, the advantages of radio frequency identification （RFID） were considered. And it put forward the idea of introducing RFID in the recycling activities of waste products. Taking into account such elements as the technical level of RFID, cost saving from remanufacturing and the cost of RFID tags, both centralized and decentralized supply chain models with different participants in waste product collection were created, in order to determine the optimal pricing strategy and RFID technical level. In the end, sensitivity analyses were conducted to analyze the impacts of scaling parameter for additional increased recovery rate with RFED on pricing and RFID technology level, and impacts of cost saving on the profits of participants in different remanufacturing closed-loop supply chain models.展开更多
基金supported by the Key Collaborative Research Program of the Alliance of International Science Organizations(ANSO-CR-KP-2022-10)Science and Technology Innovation 2030-Brain Science and Brain-Inspired Intelligence Project(2021ZD0200200)+2 种基金Natural Science Foundation of China(82151307,82202253,and 31620103905)Strategic Priority Research Program of the Chinese Academy of Sciences(XDB32030207)Science Frontier Program of the Chinese Academy of Sciences(QYZDJ-SSW-SMCO19).
文摘Closed-loop neuromodulation,especially using the phase of the electroencephalography(EEG)rhythm to assess the real-time brain state and optimize the brain stimulation process,is becoming a hot research topic.Because the EEG signal is non-stationary,the commonly used EEG phase-based prediction methods have large variances,which may reduce the accuracy of the phase prediction.In this study,we proposed a machine learning-based EEG phase prediction network,which we call EEG phase prediction network(EPN),to capture the overall rhythm distribution pattern of subjects and map the instantaneous phase directly from the narrow-band EEG data.We verified the performance of EPN on pre-recorded data,simulated EEG data,and a real-time experiment.Compared with widely used state-of-the-art models(optimized multi-layer filter architecture,auto-regress,and educated temporal prediction),EPN achieved the lowest variance and the greatest accuracy.Thus,the EPN model will provide broader applications for EEG phase-based closed-loop neuromodulation.
文摘Acute appendicitis is the most common surgical emergency that we encounter. Adynamic Intestinal obstruction due to appendicitis or its complication may be seen time and often. Mechanical obstruction because of appendicitis is uncommon and even rarer for a closed loop obstruction to occur. Although it was described as early as 1901, very few cases have been reported. We report the case of a 20 years male who presented with generalized colicky pain abdomen, abdominal distension, vomiting and obstipation for three to four days. Vital signs were stable. His abdomen was distended and peritonitic, especially in the right iliac fossa. Rest of the physical examination was unremarkable. Blood tests were normal except for leucocytosis with neutrophilia. An abdominal X-ray finding was indicating a small bowel obstruction. A midline laparotomy was performed. On intraoperative examination, distended loops of small bowel from the jejunum to the distal ileum was observed, and a constricting ring around the terminal ileum created by a phlegmonous appendicitis with its tip adherent to the root of mesentery was found, obstructing an edematous loop of small bowel without signs of ischemia. As the bowel was viable simple appendectomy was done. Postoperatively, he had an uneventful recovery and was discharged after 3 d.
基金National Natural Science Foundation of China(No.71301038)
文摘In order to construct a resource-saving and environment- friendly society, the advantages of radio frequency identification （RFID） were considered. And it put forward the idea of introducing RFID in the recycling activities of waste products. Taking into account such elements as the technical level of RFID, cost saving from remanufacturing and the cost of RFID tags, both centralized and decentralized supply chain models with different participants in waste product collection were created, in order to determine the optimal pricing strategy and RFID technical level. In the end, sensitivity analyses were conducted to analyze the impacts of scaling parameter for additional increased recovery rate with RFED on pricing and RFID technology level, and impacts of cost saving on the profits of participants in different remanufacturing closed-loop supply chain models.
