During the installation and laying process of cross-linked polyethylene(XLPE)cable,it is difficult to avoid the influence of external harsh environment,which leads to insulation deterioration and failure.The partial d...During the installation and laying process of cross-linked polyethylene(XLPE)cable,it is difficult to avoid the influence of external harsh environment,which leads to insulation deterioration and failure.The partial discharge and leakage current play an important role in formation mechanism,characteristic law and identification tech-nology of DC XLPE cable defect.However,the defect identification accuracy of single source data is limited.The correlation between partial discharge and leakage current of typical defect is analysed here.Based on the shape characteristic param-eters of typical DC partial discharge spectrum and the energy characteristic param-eters of leakage current wavelet decomposition node,a weighted Dempster-Shafer(D-S)evidence theory is used to fuse and identify different information sources.The results show that the classification rate of the proposed method can reach 88%,which can effectively identify insulation defects.展开更多
Background Robot-assisted minimally invasive esophagectomy(RAMIE)is becoming increasingly popular as a treatment for esophageal cancer.The purpose of this study was to use the da Vinci robotic system(Intuitive Surgica...Background Robot-assisted minimally invasive esophagectomy(RAMIE)is becoming increasingly popular as a treatment for esophageal cancer.The purpose of this study was to use the da Vinci robotic system(Intuitive Surgical,Sunnyvale,CA,USA)to perform 111 consecutive cases of radical esophageal cancer and report the perioperative data of surgery and postoperative complications and short-term oncological outcomes.Methods We retrospectively analyzed 111 patients who underwent RAMIE conducted at Fujian Medical University Union Hospital from August 2016 to January 2021.Each patient’s characteristics,clinicopathological stage,postoperative pathological stage,surgery outcome,postoperative recovery,and short-term oncological outcomes were analyzed.Results Of the 111 patients who underwent RAMIE,77 were male and 34 were female,and the mean age was 62.1±8.8 years.Twenty-seven patients(24.3%)received preoperative neoadjuvant therapies,the most popular of which was preoperative induction chemotherapy in 16 cases(14.4%),followed by preoperative induction radiotherapy in 8 cases(7.2%)and preoperative induction chemotherapy plus immunization in 3 cases(2.7%).The vast majority of patients(110/111,99.1%)underwent radical resection,with a mean intraoperative bleeding amount of 99.9±68.4 mL and a mean operative time of 271.9±70.0 min.The mean total number of lymph nodes removed was 40.9±16.7,including 21.8±9.0 thoracic lymph nodes.Fifty-five(49.6%)patients had lymph node metastases,including 17(15.3%)with lymph node metastases in the left recurrent laryngeal nerve,24(21.6%)with lymph node metastases in the right recurrent laryngeal nerve,and 7(6.3%)with lymph node metastases in the bilateral recurrent laryngeal nerve.The positive rate of left recurrent nerve lymph nodes was 4.77%,and he positive rate of right recurrent nerve lymph nodes was 8.38%.The main postoperative complications included pulmonary infection in 24 cases(21.6%),celiac disease in 3 cases(2.7%),tracheoesophageal fistula in 1 case(0.9%),anastomotic fistula in 3 cases(2.7%),postoperative cardiac arrhythmias in 11 cases(9.9%),VTE in 3 cases(2.7%),and pleural effusion(requiring postoperative tube drainage)in 13 cases(11.7%).Additionally,2 cases of postoperative pneumothorax(1.8%),1 case of poor incision healing(0.9%),1 case of incomplete bowel obstruction(0.9%),1 case of neck hematoma(0.9%),and 1 case of postoperative admission to the intensive care unit(0.9%)occurred.The median length of stay was 10.9±6.1 days,and there were no cases of perioperative death.Conclusions Robotic esophageal cancer radical surgery is safe and feasible.The surgeon can be proficient in thoracic robotic surgery and mediastinal lymph node dissection and achieve high levels of perioperative safety and short-term efficacy.展开更多
基金National Key R&D Program of China,Grant/Award Number:2016YFB0900705。
文摘During the installation and laying process of cross-linked polyethylene(XLPE)cable,it is difficult to avoid the influence of external harsh environment,which leads to insulation deterioration and failure.The partial discharge and leakage current play an important role in formation mechanism,characteristic law and identification tech-nology of DC XLPE cable defect.However,the defect identification accuracy of single source data is limited.The correlation between partial discharge and leakage current of typical defect is analysed here.Based on the shape characteristic param-eters of typical DC partial discharge spectrum and the energy characteristic param-eters of leakage current wavelet decomposition node,a weighted Dempster-Shafer(D-S)evidence theory is used to fuse and identify different information sources.The results show that the classification rate of the proposed method can reach 88%,which can effectively identify insulation defects.
基金supported by the National key clinical specialty of Thoracic Surgery.
文摘Background Robot-assisted minimally invasive esophagectomy(RAMIE)is becoming increasingly popular as a treatment for esophageal cancer.The purpose of this study was to use the da Vinci robotic system(Intuitive Surgical,Sunnyvale,CA,USA)to perform 111 consecutive cases of radical esophageal cancer and report the perioperative data of surgery and postoperative complications and short-term oncological outcomes.Methods We retrospectively analyzed 111 patients who underwent RAMIE conducted at Fujian Medical University Union Hospital from August 2016 to January 2021.Each patient’s characteristics,clinicopathological stage,postoperative pathological stage,surgery outcome,postoperative recovery,and short-term oncological outcomes were analyzed.Results Of the 111 patients who underwent RAMIE,77 were male and 34 were female,and the mean age was 62.1±8.8 years.Twenty-seven patients(24.3%)received preoperative neoadjuvant therapies,the most popular of which was preoperative induction chemotherapy in 16 cases(14.4%),followed by preoperative induction radiotherapy in 8 cases(7.2%)and preoperative induction chemotherapy plus immunization in 3 cases(2.7%).The vast majority of patients(110/111,99.1%)underwent radical resection,with a mean intraoperative bleeding amount of 99.9±68.4 mL and a mean operative time of 271.9±70.0 min.The mean total number of lymph nodes removed was 40.9±16.7,including 21.8±9.0 thoracic lymph nodes.Fifty-five(49.6%)patients had lymph node metastases,including 17(15.3%)with lymph node metastases in the left recurrent laryngeal nerve,24(21.6%)with lymph node metastases in the right recurrent laryngeal nerve,and 7(6.3%)with lymph node metastases in the bilateral recurrent laryngeal nerve.The positive rate of left recurrent nerve lymph nodes was 4.77%,and he positive rate of right recurrent nerve lymph nodes was 8.38%.The main postoperative complications included pulmonary infection in 24 cases(21.6%),celiac disease in 3 cases(2.7%),tracheoesophageal fistula in 1 case(0.9%),anastomotic fistula in 3 cases(2.7%),postoperative cardiac arrhythmias in 11 cases(9.9%),VTE in 3 cases(2.7%),and pleural effusion(requiring postoperative tube drainage)in 13 cases(11.7%).Additionally,2 cases of postoperative pneumothorax(1.8%),1 case of poor incision healing(0.9%),1 case of incomplete bowel obstruction(0.9%),1 case of neck hematoma(0.9%),and 1 case of postoperative admission to the intensive care unit(0.9%)occurred.The median length of stay was 10.9±6.1 days,and there were no cases of perioperative death.Conclusions Robotic esophageal cancer radical surgery is safe and feasible.The surgeon can be proficient in thoracic robotic surgery and mediastinal lymph node dissection and achieve high levels of perioperative safety and short-term efficacy.
