China Economist has continuously carried out surveys among economists and this round of survey focuses on comparison and interactions between China＇s and the United States＇ economies. The result of the survey shows ...China Economist has continuously carried out surveys among economists and this round of survey focuses on comparison and interactions between China＇s and the United States＇ economies. The result of the survey shows that economists are generally optimistic about the outlook of both countries＇economies. Respondents believed that great differences exist in the components of industrial competitiveness of China and the US; while the US leads in terms of talent, creativity, social system, industrial system integrity and financing, cost is the biggest barrier to improvement in US competitiveness. In comparison, China leads in infrastructure, cost competitiveness and government driving force but inadequate technology is the biggest barrier to improvement in China＇s competitiveness. Respondents believed that in the coming 20years, China＇s economic growth will be 5.2% and US growth will be 2.4%. Around 2034, China＇s economic aggregate will equal the US level but it will take over 60 years for China to catch up with the US in terms of per capita GDP. China＇s manufacturing technology will equal the US level around 2045. More than 62% of economists believed that the Trump administration will effectively re-shore manufacturing and the average score they give to Trump＇s ＂first 100 days ＂＂ in office is 76 points. More than 61% of economists considered it unlikely that a serious trade war will break out between China and the US. They generally believed that China and the US cooperate and compete with each other and that China-US trade enjoys great potential to grow. According to the survey, respondents are more confident about China＇s debt sustainability in comparison with the US.展开更多
We study the performance of space division multiple access （SDMA） under a non-ideal engineering situation. When the SDMA channel is of high inter-layer correlation and the condition number is large, the multiple use...We study the performance of space division multiple access （SDMA） under a non-ideal engineering situation. When the SDMA channel is of high inter-layer correlation and the condition number is large, the multiple user multiple input and multiple output user equipment （MUMIMOUE） grouping should be optimized, and in some cases further dimension-reduction should be applied. As the channel measuring is always non-ideal, we use two methods, feedback mode and non-feedback mode, in terms of performance and overhead. It is proposed that the non-feedback mode is preferable even for some non-reciprocal channels. Prin- ciple analysis and test results are given.展开更多
文摘China Economist has continuously carried out surveys among economists and this round of survey focuses on comparison and interactions between China＇s and the United States＇ economies. The result of the survey shows that economists are generally optimistic about the outlook of both countries＇economies. Respondents believed that great differences exist in the components of industrial competitiveness of China and the US; while the US leads in terms of talent, creativity, social system, industrial system integrity and financing, cost is the biggest barrier to improvement in US competitiveness. In comparison, China leads in infrastructure, cost competitiveness and government driving force but inadequate technology is the biggest barrier to improvement in China＇s competitiveness. Respondents believed that in the coming 20years, China＇s economic growth will be 5.2% and US growth will be 2.4%. Around 2034, China＇s economic aggregate will equal the US level but it will take over 60 years for China to catch up with the US in terms of per capita GDP. China＇s manufacturing technology will equal the US level around 2045. More than 62% of economists believed that the Trump administration will effectively re-shore manufacturing and the average score they give to Trump＇s ＂first 100 days ＂＂ in office is 76 points. More than 61% of economists considered it unlikely that a serious trade war will break out between China and the US. They generally believed that China and the US cooperate and compete with each other and that China-US trade enjoys great potential to grow. According to the survey, respondents are more confident about China＇s debt sustainability in comparison with the US.
文摘We study the performance of space division multiple access （SDMA） under a non-ideal engineering situation. When the SDMA channel is of high inter-layer correlation and the condition number is large, the multiple user multiple input and multiple output user equipment （MUMIMOUE） grouping should be optimized, and in some cases further dimension-reduction should be applied. As the channel measuring is always non-ideal, we use two methods, feedback mode and non-feedback mode, in terms of performance and overhead. It is proposed that the non-feedback mode is preferable even for some non-reciprocal channels. Prin- ciple analysis and test results are given.
