OBJECTIVE: To evaluate the surgical treatment of pancreatic carcinoma. METHODS: 101 patients with pancreatic carcinoma admitted from 1995 to 2002 were studied retrospectively. Of 83 patients undergoing surgery, 56 (64...OBJECTIVE: To evaluate the surgical treatment of pancreatic carcinoma. METHODS: 101 patients with pancreatic carcinoma admitted from 1995 to 2002 were studied retrospectively. Of 83 patients undergoing surgery, 56 (64.5%) were subjected to tumor resection. Whipple' s procedure was performed in 48 patients, extended regional pancreatectomy and autograft intestinal transplantation in 2, combined resection of pancreatic body or tail carcinoma in 6, and 27 patients with unresectable pancreatic carcinoma were given inner drainage. RESULTS: Wound dehiscence and digestive bleeding were found in one patient respectively. Pancreatic fistula was found in one patient undergoing extended regional pancreatectomy and autograft intestinal transplantation. Other patients recovered uneventfully. CONCLUSIONS: Most patients with pancreatic carcinoma could undergo tumor resection. Blood vessel repair or transplantation can be used if the tumor adherent to the superior mesenteric-portal vein. Extended regional pancreatectomy and autograft intestinal transplantation are feasible. Simple inner drainage should be used in the patient whose neoplasm is unresectable.展开更多
Terahertz polarization conversion devices have significant potential applications in various fields such as terahertzimaging and spectroscopy.In this paper,we utilize genetic algorithms to topologically optimize the m...Terahertz polarization conversion devices have significant potential applications in various fields such as terahertzimaging and spectroscopy.In this paper,we utilize genetic algorithms to topologically optimize the metasurface unit cellsand design a reflective linear polarization conversion metasurface with ultra-broadband and wide-angle characteristics.By partitioning the metallic pattern layer into quadrants,the encoding length is effectively reduced,resulting in a shorteroptimization time.The research results indicate that the converter possesses a polarization conversion efficiency ratio higherthan 90%and a relative bandwidth ratio of 125%in a range of 0.231-0.995 THz.Meanwhile,it can maintain excellentpolarization conversion properties when the incident angle of terahertz waves is less than 45°and the polarization angle isless than 15°,demonstrating excellent practicality.New insights are provided for the design of terahertz wide-angle ultrawidebandpolarization conversion devices,and the proposed metasurfce has potential applications in terahertz polarizationimaging,spectroscopy and communication fields.展开更多
文摘OBJECTIVE: To evaluate the surgical treatment of pancreatic carcinoma. METHODS: 101 patients with pancreatic carcinoma admitted from 1995 to 2002 were studied retrospectively. Of 83 patients undergoing surgery, 56 (64.5%) were subjected to tumor resection. Whipple' s procedure was performed in 48 patients, extended regional pancreatectomy and autograft intestinal transplantation in 2, combined resection of pancreatic body or tail carcinoma in 6, and 27 patients with unresectable pancreatic carcinoma were given inner drainage. RESULTS: Wound dehiscence and digestive bleeding were found in one patient respectively. Pancreatic fistula was found in one patient undergoing extended regional pancreatectomy and autograft intestinal transplantation. Other patients recovered uneventfully. CONCLUSIONS: Most patients with pancreatic carcinoma could undergo tumor resection. Blood vessel repair or transplantation can be used if the tumor adherent to the superior mesenteric-portal vein. Extended regional pancreatectomy and autograft intestinal transplantation are feasible. Simple inner drainage should be used in the patient whose neoplasm is unresectable.
基金supported by the National Natural Science Foundation of China and the Open Project Program of Wuhan National Laboratory for Optoelectronics(Grant No.2022WNLOKF012).
文摘Terahertz polarization conversion devices have significant potential applications in various fields such as terahertzimaging and spectroscopy.In this paper,we utilize genetic algorithms to topologically optimize the metasurface unit cellsand design a reflective linear polarization conversion metasurface with ultra-broadband and wide-angle characteristics.By partitioning the metallic pattern layer into quadrants,the encoding length is effectively reduced,resulting in a shorteroptimization time.The research results indicate that the converter possesses a polarization conversion efficiency ratio higherthan 90%and a relative bandwidth ratio of 125%in a range of 0.231-0.995 THz.Meanwhile,it can maintain excellentpolarization conversion properties when the incident angle of terahertz waves is less than 45°and the polarization angle isless than 15°,demonstrating excellent practicality.New insights are provided for the design of terahertz wide-angle ultrawidebandpolarization conversion devices,and the proposed metasurfce has potential applications in terahertz polarizationimaging,spectroscopy and communication fields.
