A convolutional weighting （CW） scheme applied to a half-wavelength spacing array was proposed for multi-user system to joint STBC （space time block ceding） and beam forming （BF）. The transmitting beam is equival...A convolutional weighting （CW） scheme applied to a half-wavelength spacing array was proposed for multi-user system to joint STBC （space time block ceding） and beam forming （BF）. The transmitting beam is equivalent to the product of two sub-beams. One is used to realize interference suppression, while the other is employed to form a couple of uncorrelated channels from base station （BS） to the desited user （to meet the requirement of STBC） and to maximize SINR （signal-to-interference-plus noise ratio） at the desired receiver. As an optimum combination of STBC and beam forming, the proposed scheme can achieve both full diversity order of STBC and array gain of BF. Meanwhile, it can also effec- tively restrain multi-user interference by nulling. Simulation results show that the proposed scheme can significantly improve the BER （Bit Error Rate） performance and enhance system capacity as compared with the conventional eigen-beamforming （EBF） technique applied to a half-wavelength spacing array.展开更多
Though split-liver and living-related transplantation are routinely performed,they are done almost exclusively for primary liver transplantation because of potential surgical difficulties.These difficulties are genera...Though split-liver and living-related transplantation are routinely performed,they are done almost exclusively for primary liver transplantation because of potential surgical difficulties.These difficulties are generally related to arterial revascularization,particularly if there is hepatic artery thrombosis.According to UNOS data,of the hepatic retransplantations performed between 1996 and 2007,only 8.7% were done using right or extended right grafts from deceased donors,and 14.3% using right grafts from live donors.Here we report our experience with 5 hepatic retransplantations in which right partial grafts resulting from conventional in situ splits,and one right lobe resulting from an adult-toadult living-related transplant,were successfully used with different modalities of graft arterialization.展开更多
this paper based on the food security, the food the macroeconomic regulation and control of the operation mechanism of the general theory, focus on the China＇s grain macroeconomic regulation and control mechanism, th...this paper based on the food security, the food the macroeconomic regulation and control of the operation mechanism of the general theory, focus on the China＇s grain macroeconomic regulation and control mechanism, the concept of grain macroeconomic regulation and control mechanism, the grain circulation macroeconomic regulation and control tool application, grain circulation macroeconomic regulation and control system, the problem of grain circulation system, food price formation mechanism. Through the research set up grain control of the operation mechanism of general theory.展开更多
基金Supported by the National Natural Science Foundation of Chin（No. 60302020）.
文摘A convolutional weighting （CW） scheme applied to a half-wavelength spacing array was proposed for multi-user system to joint STBC （space time block ceding） and beam forming （BF）. The transmitting beam is equivalent to the product of two sub-beams. One is used to realize interference suppression, while the other is employed to form a couple of uncorrelated channels from base station （BS） to the desited user （to meet the requirement of STBC） and to maximize SINR （signal-to-interference-plus noise ratio） at the desired receiver. As an optimum combination of STBC and beam forming, the proposed scheme can achieve both full diversity order of STBC and array gain of BF. Meanwhile, it can also effec- tively restrain multi-user interference by nulling. Simulation results show that the proposed scheme can significantly improve the BER （Bit Error Rate） performance and enhance system capacity as compared with the conventional eigen-beamforming （EBF） technique applied to a half-wavelength spacing array.
文摘Though split-liver and living-related transplantation are routinely performed,they are done almost exclusively for primary liver transplantation because of potential surgical difficulties.These difficulties are generally related to arterial revascularization,particularly if there is hepatic artery thrombosis.According to UNOS data,of the hepatic retransplantations performed between 1996 and 2007,only 8.7% were done using right or extended right grafts from deceased donors,and 14.3% using right grafts from live donors.Here we report our experience with 5 hepatic retransplantations in which right partial grafts resulting from conventional in situ splits,and one right lobe resulting from an adult-toadult living-related transplant,were successfully used with different modalities of graft arterialization.
文摘this paper based on the food security, the food the macroeconomic regulation and control of the operation mechanism of the general theory, focus on the China＇s grain macroeconomic regulation and control mechanism, the concept of grain macroeconomic regulation and control mechanism, the grain circulation macroeconomic regulation and control tool application, grain circulation macroeconomic regulation and control system, the problem of grain circulation system, food price formation mechanism. Through the research set up grain control of the operation mechanism of general theory.
