该文提出一种参数化预报方法,制作北京及其周边地区夏季空气质量气象条件指数预报。采用2000—2007年7—9月北京市观象台大气成分(PM10)逐日观测资料和华北区域气象站网加密地面观测及探空信息,分析北京地区夏季奥运会历史同期与高污染...该文提出一种参数化预报方法,制作北京及其周边地区夏季空气质量气象条件指数预报。采用2000—2007年7—9月北京市观象台大气成分(PM10)逐日观测资料和华北区域气象站网加密地面观测及探空信息,分析北京地区夏季奥运会历史同期与高污染过程(PM10浓度>150μg/m3)关系密切的敏感气象要素和变量。引入适应度函数分级方法,计算北京周边不同观测站可能形成污染向北京输送的权重,建立北京夏季空气质量气象条件参数PLAM(parameters linking air-quality and meteorology)预报模型。PLAM指数给出北京局地污染气象条件的客观定量诊断和预测,并可指示周边地区有利(或不利)于污染向北京输送的强度和方位。夏季"静稳型"气象条件参数化PLAM方法为北京奥运气象保障任务实时提供预报产品,分别用PM10及可吸入颗粒物指数(API)对2008年7—8月PLAM逐日预报进行检验,相关系数达到0.001显著性水平。展开更多
This study is concerned with the stabilization issue of nonlinear systems subject to parameter uncertainties. An interval type-2 T-S fuzzy model is used to represent the nonlinear systems subject to parameter uncertai...This study is concerned with the stabilization issue of nonlinear systems subject to parameter uncertainties. An interval type-2 T-S fuzzy model is used to represent the nonlinear systems subject to parameter uncertainties. An interval type-2 fuzzy static output feedback controller is designed to synthesize the interval type-2 T-S fuzzy systems. The membership-function-dependent stability conditions are derived by utilizing the information of upper and lower membership functions. The proposed stability conditions are presented in the form of linear matrix inequalities（LMIs）. LMI-based stability conditions for interval type-2 fuzzy static output feedback H_∞ control synthesis are also developed.Several simulation examples are given to show the superiority of the proposed approach.展开更多
文摘该文提出一种参数化预报方法,制作北京及其周边地区夏季空气质量气象条件指数预报。采用2000—2007年7—9月北京市观象台大气成分(PM10)逐日观测资料和华北区域气象站网加密地面观测及探空信息,分析北京地区夏季奥运会历史同期与高污染过程(PM10浓度>150μg/m3)关系密切的敏感气象要素和变量。引入适应度函数分级方法,计算北京周边不同观测站可能形成污染向北京输送的权重,建立北京夏季空气质量气象条件参数PLAM(parameters linking air-quality and meteorology)预报模型。PLAM指数给出北京局地污染气象条件的客观定量诊断和预测,并可指示周边地区有利(或不利)于污染向北京输送的强度和方位。夏季"静稳型"气象条件参数化PLAM方法为北京奥运气象保障任务实时提供预报产品,分别用PM10及可吸入颗粒物指数(API)对2008年7—8月PLAM逐日预报进行检验,相关系数达到0.001显著性水平。
基金supported by the National Natural Science Foundation of China under Grant Nos.61134001,51477146the Applied Basic Research Program of Science and Technology Department of Sichuan Province,China under Grant No.2016JY0085
文摘This study is concerned with the stabilization issue of nonlinear systems subject to parameter uncertainties. An interval type-2 T-S fuzzy model is used to represent the nonlinear systems subject to parameter uncertainties. An interval type-2 fuzzy static output feedback controller is designed to synthesize the interval type-2 T-S fuzzy systems. The membership-function-dependent stability conditions are derived by utilizing the information of upper and lower membership functions. The proposed stability conditions are presented in the form of linear matrix inequalities（LMIs）. LMI-based stability conditions for interval type-2 fuzzy static output feedback H_∞ control synthesis are also developed.Several simulation examples are given to show the superiority of the proposed approach.
