Objective To explore the effects of cognitive intervention on the quality of life in patients with functional dyspepsia(FD).Methods From May 2013 to February2015,a total of 412 patients with FD were enrolled,cognition...Objective To explore the effects of cognitive intervention on the quality of life in patients with functional dyspepsia(FD).Methods From May 2013 to February2015,a total of 412 patients with FD were enrolled,cognition of the disease and the quality of life were assessed by disease cognitive simple questionnaire(B-IPQ)and Nepean dyspepsia index(NDI).The patients also re-展开更多
This study demonstrates amplification of electrical signals using a very simple nanomechanical device.It is shown that vibration amplitude amplification using a combination of mechanical resonance and thermal-piezores...This study demonstrates amplification of electrical signals using a very simple nanomechanical device.It is shown that vibration amplitude amplification using a combination of mechanical resonance and thermal-piezoresistive energy pumping,which was previously demonstrated to drive self-sustained mechanical oscillation,can turn the relatively weak piezoresistivity of silicon into a viable electronic amplification mechanism with power gains of 420 dB.Various functionalities ranging from frequency selection and timing to sensing and actuation have been successfully demonstrated for microscale and nanoscale electromechanical systems.Although such capabilities complement solid-state electronics,enabling state-of-the-art compact and high-performance electronics,the amplification of electronic signals is an area where micro-/nanomechanics has not experienced much progress.In contrast to semiconductor devices,the performance of the proposed nanoelectromechanical amplifier improves significantly as the dimensions are reduced to the nanoscale presenting a potential pathway toward deep-nanoscale electronics.The nanoelectromechanical amplifier can also address the need for ultranarrow-band filtering along with the amplification of lowpower signals in wireless communications and certain sensing applications,which is another need that is not efficiently addressable using semiconductor technology.展开更多
文摘Objective To explore the effects of cognitive intervention on the quality of life in patients with functional dyspepsia(FD).Methods From May 2013 to February2015,a total of 412 patients with FD were enrolled,cognition of the disease and the quality of life were assessed by disease cognitive simple questionnaire(B-IPQ)and Nepean dyspepsia index(NDI).The patients also re-
基金This work was supported by National Science Foundation CAREER grant No.1056068.
文摘This study demonstrates amplification of electrical signals using a very simple nanomechanical device.It is shown that vibration amplitude amplification using a combination of mechanical resonance and thermal-piezoresistive energy pumping,which was previously demonstrated to drive self-sustained mechanical oscillation,can turn the relatively weak piezoresistivity of silicon into a viable electronic amplification mechanism with power gains of 420 dB.Various functionalities ranging from frequency selection and timing to sensing and actuation have been successfully demonstrated for microscale and nanoscale electromechanical systems.Although such capabilities complement solid-state electronics,enabling state-of-the-art compact and high-performance electronics,the amplification of electronic signals is an area where micro-/nanomechanics has not experienced much progress.In contrast to semiconductor devices,the performance of the proposed nanoelectromechanical amplifier improves significantly as the dimensions are reduced to the nanoscale presenting a potential pathway toward deep-nanoscale electronics.The nanoelectromechanical amplifier can also address the need for ultranarrow-band filtering along with the amplification of lowpower signals in wireless communications and certain sensing applications,which is another need that is not efficiently addressable using semiconductor technology.
