Augmented UD identification (AUDI) technique is derived from the traditional recursive least-squares (RLS) algorithm and has been developed rapidly during the last decade. AUDI is a cluster of identification algorithm...Augmented UD identification (AUDI) technique is derived from the traditional recursive least-squares (RLS) algorithm and has been developed rapidly during the last decade. AUDI is a cluster of identification algorithms based on matrix factorization methods (such as QR and LDL) and thus shows its stable performance in system identification applications. An AUDI algorithm with resetting strategy (RAUDI) has much ability in rapid time-varying SISO system identification. In this paper, an endeavor to expand the RAUDI in MIMO system identification is made and a comparative experiement is done to exhibit its good ability in rapidly changing parameter estimate in MIMO system.展开更多
A cyclic flip gait is designed for a novel one legged robot in the paper. Trajectory synthesis of the flip gait is formulized as a problem of numerical optimization subject to nonlinear second order constraints such a...A cyclic flip gait is designed for a novel one legged robot in the paper. Trajectory synthesis of the flip gait is formulized as a problem of numerical optimization subject to nonlinear second order constraints such as positive reaction force of ground and finite torque of the joints. The simulation results are given.展开更多
Demographic methods and techniques are powerful tools to quantitatively analyse and understand the phenomenon of population. However, the scientifi c methods and techniques are likely to draw wrong conclusions, and th...Demographic methods and techniques are powerful tools to quantitatively analyse and understand the phenomenon of population. However, the scientifi c methods and techniques are likely to draw wrong conclusions, and they may even become the amulet of a fallacy, if they are used undeservedly. In recent years, misuse and abuse of demographic methods appear quite often in population studies, which are harmful to the seriousness and the accuracy of population statistics. Taking a new study of the fertility level with the P/F ratio method for the 2010 national population census as an example, this paper displays how a scientific method could produce a series of misleading conclusions when the assumptions were ignored and the precondition were not satisfi ed. Therefore, researchers should be wary of misuse and abuse of demographic methods in population studies.展开更多
Because some efficient motion estimation algorithms need considering global camera motion such as zooming, panning, rotating and tilting, a frequency domain algorithm is proposed to solve this problem. Utilizing the m...Because some efficient motion estimation algorithms need considering global camera motion such as zooming, panning, rotating and tilting, a frequency domain algorithm is proposed to solve this problem. Utilizing the magnitude relationship and phase relationship between successive images’ spectra, the authors can solve the full parameter camera motion robustly with acceptable computational complexity.展开更多
Objective The purpose of this study is to evaluate the role of point-of-care ultrasound( POCUS) in assessm ent of patients with dyspnea in Rapid Response Team( RRT)consultation. 53 patients were included and their pre...Objective The purpose of this study is to evaluate the role of point-of-care ultrasound( POCUS) in assessm ent of patients with dyspnea in Rapid Response Team( RRT)consultation. 53 patients were included and their pre-POCUS, post-POCUS and final diagnoses were docum ented. Com pared with pre-POCUS diagnoses,the accuracy of postPOCUS diagnoses increased significantly from 37.7% up to 79.2%,P<0.01( final diagnoses as golden standard). When stratified by etiology, we can see that POCUS im proved the diagnostic sensitivity and specificity in m ost of the diseases. But still there were 11 patients in whom POCUS fail to diagnose. And in those POCUS-fail group the m ortality seem ed higher than in POCUS achieved group. In conclusion POCUS is a convenient and useful diagnostic tool which can im prove the diagnostic accuracy of patients with sudden onset of dyspnea in RRT consultation.展开更多
文摘Augmented UD identification (AUDI) technique is derived from the traditional recursive least-squares (RLS) algorithm and has been developed rapidly during the last decade. AUDI is a cluster of identification algorithms based on matrix factorization methods (such as QR and LDL) and thus shows its stable performance in system identification applications. An AUDI algorithm with resetting strategy (RAUDI) has much ability in rapid time-varying SISO system identification. In this paper, an endeavor to expand the RAUDI in MIMO system identification is made and a comparative experiement is done to exhibit its good ability in rapidly changing parameter estimate in MIMO system.
文摘A cyclic flip gait is designed for a novel one legged robot in the paper. Trajectory synthesis of the flip gait is formulized as a problem of numerical optimization subject to nonlinear second order constraints such as positive reaction force of ground and finite torque of the joints. The simulation results are given.
文摘Demographic methods and techniques are powerful tools to quantitatively analyse and understand the phenomenon of population. However, the scientifi c methods and techniques are likely to draw wrong conclusions, and they may even become the amulet of a fallacy, if they are used undeservedly. In recent years, misuse and abuse of demographic methods appear quite often in population studies, which are harmful to the seriousness and the accuracy of population statistics. Taking a new study of the fertility level with the P/F ratio method for the 2010 national population census as an example, this paper displays how a scientific method could produce a series of misleading conclusions when the assumptions were ignored and the precondition were not satisfi ed. Therefore, researchers should be wary of misuse and abuse of demographic methods in population studies.
文摘Because some efficient motion estimation algorithms need considering global camera motion such as zooming, panning, rotating and tilting, a frequency domain algorithm is proposed to solve this problem. Utilizing the magnitude relationship and phase relationship between successive images’ spectra, the authors can solve the full parameter camera motion robustly with acceptable computational complexity.
文摘Objective The purpose of this study is to evaluate the role of point-of-care ultrasound( POCUS) in assessm ent of patients with dyspnea in Rapid Response Team( RRT)consultation. 53 patients were included and their pre-POCUS, post-POCUS and final diagnoses were docum ented. Com pared with pre-POCUS diagnoses,the accuracy of postPOCUS diagnoses increased significantly from 37.7% up to 79.2%,P<0.01( final diagnoses as golden standard). When stratified by etiology, we can see that POCUS im proved the diagnostic sensitivity and specificity in m ost of the diseases. But still there were 11 patients in whom POCUS fail to diagnose. And in those POCUS-fail group the m ortality seem ed higher than in POCUS achieved group. In conclusion POCUS is a convenient and useful diagnostic tool which can im prove the diagnostic accuracy of patients with sudden onset of dyspnea in RRT consultation.
