Based on the system dynamic model, a full system dynamics estimation method is proposed for a chain shell magazine driven by a permanent magnet synchronous motor(PMSM). An adaptive extended state observer(AESO) is pro...Based on the system dynamic model, a full system dynamics estimation method is proposed for a chain shell magazine driven by a permanent magnet synchronous motor(PMSM). An adaptive extended state observer(AESO) is proposed to estimate the unmeasured states and disturbance, in which the model parameters are adjusted in real time. Theoretical analysis shows that the estimation errors of the disturbances and unmeasured states converge exponentially to zero, and the parameter estimation error can be obtained from the extended state. Then, based on the extended state of the AESO, a novel parameter estimation law is designed. Due to the convergence of AESO, the novel parameter estimation law is insensitive to controllers and excitation signal. Under persistent excitation(PE) condition, the estimated parameters will converge to a compact set around the actual parameter value. Without PE signal, the estimated parameters will converge to zero for the extended state. Simulation and experimental results show that the proposed method can accurately estimate the unmeasured states and disturbance of the chain shell magazine, and the estimated parameters will converge to the actual value without strictly continuous PE signals.展开更多
Little information on cancer coverage rather than newspaper and television is available. Japanese weekly magazines have a circulation of over 2,700,000 per week. To examine how they delivered urogenital cancer informa...Little information on cancer coverage rather than newspaper and television is available. Japanese weekly magazines have a circulation of over 2,700,000 per week. To examine how they delivered urogenital cancer information to the public, cancer-related articles and advertisements in six major Japanese weekly magazines from 2009 to 2010 was analyzed. 1.8% of total articles and advertisements were cancer-related. Prostate cancer (n = 119) was the second-most common topic, following lung cancer (n = 145), whereas only three articles were published on kidney or bladder cancer. The 53 articles on therapies for prostate cancer comprised radiotherapy (n = 29), surgery (n = 16), chemotherapy (n = 4), and others (n = 4). All 42 comments or interviews were cited in the article on prostate cancer, while 26 of them were attributed to only two famous doctors. Although cancer coverage in weekly magazines could be useful to spread information on prostate cancer, we should recognize their considerable bias based on a disproportionate emphasis.展开更多
Time has the world's largest circulation as a weekly news magazine,and has a readership of 25 million,20 million of which are in the US.Time was created in 1923 by Briton Hadden and Henry Luce,making it the first ...Time has the world's largest circulation as a weekly news magazine,and has a readership of 25 million,20 million of which are in the US.Time was created in 1923 by Briton Hadden and Henry Luce,making it the first weekly news magazine in the United States.The two had previously worked together as chairman and managing editor respectively of the Yale Daily News.It set out to tell the news through people,and for many decades the magazine's cover was of a single person.Since 2000,the magazine has been part of AOL Time Warner,which subsequently reverted to the name Time Warner in 2003.展开更多
RecentlyⅠ read a large list in the weekly newspaper-The Eco-nomic Observer,which includes a candidate companies to be elected as China’s most respectful companies
文摘Based on the system dynamic model, a full system dynamics estimation method is proposed for a chain shell magazine driven by a permanent magnet synchronous motor(PMSM). An adaptive extended state observer(AESO) is proposed to estimate the unmeasured states and disturbance, in which the model parameters are adjusted in real time. Theoretical analysis shows that the estimation errors of the disturbances and unmeasured states converge exponentially to zero, and the parameter estimation error can be obtained from the extended state. Then, based on the extended state of the AESO, a novel parameter estimation law is designed. Due to the convergence of AESO, the novel parameter estimation law is insensitive to controllers and excitation signal. Under persistent excitation(PE) condition, the estimated parameters will converge to a compact set around the actual parameter value. Without PE signal, the estimated parameters will converge to zero for the extended state. Simulation and experimental results show that the proposed method can accurately estimate the unmeasured states and disturbance of the chain shell magazine, and the estimated parameters will converge to the actual value without strictly continuous PE signals.
文摘Little information on cancer coverage rather than newspaper and television is available. Japanese weekly magazines have a circulation of over 2,700,000 per week. To examine how they delivered urogenital cancer information to the public, cancer-related articles and advertisements in six major Japanese weekly magazines from 2009 to 2010 was analyzed. 1.8% of total articles and advertisements were cancer-related. Prostate cancer (n = 119) was the second-most common topic, following lung cancer (n = 145), whereas only three articles were published on kidney or bladder cancer. The 53 articles on therapies for prostate cancer comprised radiotherapy (n = 29), surgery (n = 16), chemotherapy (n = 4), and others (n = 4). All 42 comments or interviews were cited in the article on prostate cancer, while 26 of them were attributed to only two famous doctors. Although cancer coverage in weekly magazines could be useful to spread information on prostate cancer, we should recognize their considerable bias based on a disproportionate emphasis.
文摘Time has the world's largest circulation as a weekly news magazine,and has a readership of 25 million,20 million of which are in the US.Time was created in 1923 by Briton Hadden and Henry Luce,making it the first weekly news magazine in the United States.The two had previously worked together as chairman and managing editor respectively of the Yale Daily News.It set out to tell the news through people,and for many decades the magazine's cover was of a single person.Since 2000,the magazine has been part of AOL Time Warner,which subsequently reverted to the name Time Warner in 2003.
文摘RecentlyⅠ read a large list in the weekly newspaper-The Eco-nomic Observer,which includes a candidate companies to be elected as China’s most respectful companies
