There are many proposed optimal or suboptimal al- gorithms to update out-of-sequence measurement（s） （OoSM（s）） for linear-Gaussian systems, but few algorithms are dedicated to track a maneuvering target in clutte...There are many proposed optimal or suboptimal al- gorithms to update out-of-sequence measurement（s） （OoSM（s）） for linear-Gaussian systems, but few algorithms are dedicated to track a maneuvering target in clutter by using OoSMs. In order to address the nonlinear OoSMs obtained by the airborne radar located on a moving platform from a maneuvering target in clut- ter, an interacting multiple model probabilistic data association （IMMPDA） algorithm with the OoSM is developed. To be practical, the algorithm is based on the Earth-centered Earth-fixed （ECEF） coordinate system where it considers the effect of the platform＇s attitude and the curvature of the Earth. The proposed method is validated through the Monte Carlo test compared with the perfor- mance of the standard IMMPDA algorithm ignoring the OoSM, and the conclusions show that using the OoSM can improve the track- ing performance, and the shorter the lag step is, the greater degree the performance is improved, but when the lag step is large, the performance is not improved any more by using the OoSM, which can provide some references for engineering application.展开更多
Purpose:This article examines how early childhood curriculum documents in two culturally different contexts are associated with current concepts of sustainability and principles of early childhood education for sustai...Purpose:This article examines how early childhood curriculum documents in two culturally different contexts are associated with current concepts of sustainability and principles of early childhood education for sustainability(ECEfS)in China and Norway.Design/Approach/Methods:Applying critical document analysis,the study explores a number of landmark curriculum documents from China and Norway,comparing the ways in which ECEfS is conceptualized,including the concept of sustainability,children as agents of change for sustainability,and sustainability in young children’s everyday lives.Findings:Corresponding to the analytical framework,China and Norway attach different importance to the three dimensions of sustainability-social-cultural,economic,and environmental.For example,Norway has a more autonomous view of children’s agency,while China gives more emphasis to teachers’support.The two countries also have different perspectives on how to work with families and communities based on significantly different traditions and institutions.The comparative document analysis argues that predominant cultural dimensions in each context,such as collectivist and individualistic factors,may shape the understandings of sustainability in each country’s early years’curriculum documents.Originality/Values:By broadening the focus on the social-cultural aspects of sustainability,this study extends the development of a culturally inclusive understanding of the concept of sustainability and contextualized/localized approaches to ECEfS across the globe.展开更多
基金supported by the National Natural Science Foundation of China(61102168)
文摘There are many proposed optimal or suboptimal al- gorithms to update out-of-sequence measurement（s） （OoSM（s）） for linear-Gaussian systems, but few algorithms are dedicated to track a maneuvering target in clutter by using OoSMs. In order to address the nonlinear OoSMs obtained by the airborne radar located on a moving platform from a maneuvering target in clut- ter, an interacting multiple model probabilistic data association （IMMPDA） algorithm with the OoSM is developed. To be practical, the algorithm is based on the Earth-centered Earth-fixed （ECEF） coordinate system where it considers the effect of the platform＇s attitude and the curvature of the Earth. The proposed method is validated through the Monte Carlo test compared with the perfor- mance of the standard IMMPDA algorithm ignoring the OoSM, and the conclusions show that using the OoSM can improve the track- ing performance, and the shorter the lag step is, the greater degree the performance is improved, but when the lag step is large, the performance is not improved any more by using the OoSM, which can provide some references for engineering application.
文摘Purpose:This article examines how early childhood curriculum documents in two culturally different contexts are associated with current concepts of sustainability and principles of early childhood education for sustainability(ECEfS)in China and Norway.Design/Approach/Methods:Applying critical document analysis,the study explores a number of landmark curriculum documents from China and Norway,comparing the ways in which ECEfS is conceptualized,including the concept of sustainability,children as agents of change for sustainability,and sustainability in young children’s everyday lives.Findings:Corresponding to the analytical framework,China and Norway attach different importance to the three dimensions of sustainability-social-cultural,economic,and environmental.For example,Norway has a more autonomous view of children’s agency,while China gives more emphasis to teachers’support.The two countries also have different perspectives on how to work with families and communities based on significantly different traditions and institutions.The comparative document analysis argues that predominant cultural dimensions in each context,such as collectivist and individualistic factors,may shape the understandings of sustainability in each country’s early years’curriculum documents.Originality/Values:By broadening the focus on the social-cultural aspects of sustainability,this study extends the development of a culturally inclusive understanding of the concept of sustainability and contextualized/localized approaches to ECEfS across the globe.
