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您的检索式：作者名="Chengpu Yu"
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| 1 | Prior area searching for energy-based sound source localization显示文摘Traditional energy-based sound source localization methods have the problems of the large solution space and time-consuming calculation.Accordingly,this paper proposes to use the data collected by each acoustic sensor and their corresponding weights to adaptively initialize the prior area of a target.In this way,the potential existence range of the target is reduced and the location estimate can be determined in a small area.Specifically,we first determine the initial search point based on the current sound data and the set rules.Then,the prior location of the target is iteratively searched according to different sound energy circles’weights.Next,the prior area of the target is determined around the prior location.Finally,the precise location of the target is further traversed to minimize the objective function,which is constructed by the weighted nonlinear least squares location(WNLS)algorithm.A series of indoor experiments are performed.The results show that our method can effectively improve the positioning accuracy by approximately 13%and greatly reduce the calculation time. | Feng GAO Yeyun CAI Fang DENG Chengpu YU Jie CHEN | 2022 | Science China(Information Sciences)2022，65，12： | 1 |
| 2 | Recursive Least Squares Identification With Variable-Direction Forgetting via Oblique Projection Decomposition显示文摘In this paper,a new recursive least squares(RLS)identification algorithm with variable-direction forgetting(VDF)is proposed for multi-output systems.The objective is to enhance parameter estimation performance under non-persistent excitation.The proposed algorithm performs oblique projection decomposition of the information matrix,such that forgetting is applied only to directions where new information is received.Theoretical proofs show that even without persistent excitation,the information matrix remains lower and upper bounded,and the estimation error variance converges to be within a finite bound.Moreover,detailed analysis is made to compare with a recently reported VDF algorithm that exploits eigenvalue decomposition(VDF-ED).It is revealed that under non-persistent excitation,part of the forgotten subspace in the VDF-ED algorithm could discount old information without receiving new data,which could produce a more ill-conditioned information matrix than our proposed algorithm.Numerical simulation results demonstrate the efficacy and advantage of our proposed algorithm over this recent VDF-ED algorithm. | Kun Zhu Chengpu Yu Yiming Wan | 2022 | IEEE/CAA Journal of Automatica Sinica2022，9，3： | 1 |
| 3 | A multiplicative Nakagami speckle reduction algorithm for ultrasound images显示文摘 | Chengpu Yu Cishen Zhang Lihua Xie | 2012 | Multidimensional Systems and Signal Processing2012，，4： | 1 |
| 4 | Changes in Disease Patterns in Rural China,With an Explanatory Framework显示文摘Data on the disease pattern in rural China over the past hundred years show that chronic diseases have now replaced infectious diseases as the major health problems plaguing rural residents.From the perspective of life-course research,taken together with medical anthropology's emphasis on bio-sociocultural integrity,we can divide chronic diseases into two:the chronic diseases of excessive depletion and the chronic diseases of excessive intake.The former are mainly the result of societal experiences engraved on the body;chronic diseases represented by arthritis and intervertebral disc disease arc the marks left on the human body by the'hard times'of the early years.The latter is the result of the transformation of working life in which the abundance of material resources and the reduction of physical exertion occur simultaneously;the rapid arrival of the'good times'mean that bodies that have long suffered from hunger and exhaustion find it hard to adapt.Hypertension and diabetes are the physical manifestations of this distress.Fundamentally,chronic diseases falling into the over-intake category may appear to originate from the sweetness of current life,but they are in fact the physical reproduction of earlier experiences.Our village case study fleshes out this explanatory framework,allowing us to see the complex relationship between social institutions,livelihood patterns,cultural mindsets,bodily habits,and disease. | Yu Chengpu | 2021 | Social Sciences in China2021，42，3： | 0 |
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