The estimation of the disturbance input acting on a vehicle from its given responses is an inverse problem.To overcome some of the issues related to ill-posed inverse problems,this work proposes a method of reconstruc...The estimation of the disturbance input acting on a vehicle from its given responses is an inverse problem.To overcome some of the issues related to ill-posed inverse problems,this work proposes a method of reconstructing the road roughness based on the Kalman filter method.A half-car model that considers both the vehicle and equipment is established,and the joint input-state estimation method is used to identify the road profile.The capabilities of this methodology in the presence of noise are numerically demonstrated.Moreover,to reduce the influence of the driving speed on the estimation results,a method of choosing the calculation frequency is proposed.A road vibration test is conducted to benchmark the proposed method.展开更多
An iron-catalyzed four-component reaction of cycloketone oxime esters,alkenes,DABCO·(SO_(2))_(2) and tri-methylsilyl azide(TMSN_(3))is described.This multicomponent radical transformation presents excellent regio...An iron-catalyzed four-component reaction of cycloketone oxime esters,alkenes,DABCO·(SO_(2))_(2) and tri-methylsilyl azide(TMSN_(3))is described.This multicomponent radical transformation presents excellent regio-and chemoselectivity,leading to a range of β-azidosulfones in moderate to excellent yields.In this protocol,the utilization of a sulfur dioxide surrogate of DABCO·(SO_(2))_(2) as the source of the sulfonyl group enables the reaction to proceed efficiently under mild conditions without the need for strong oxidants.Additionally,the products can be transformed intoβ-aminosulfones and other valuable sulfonyl-contain-ing nitrogen heterocycles.展开更多
The generation of methylsufonyl-containing thioflavones through a radical relay reaction of methylthiolated phenylalkynones and potassium metabisulfite in the presence of a catalytic amount of sodium methylsulfinate a...The generation of methylsufonyl-containing thioflavones through a radical relay reaction of methylthiolated phenylalkynones and potassium metabisulfite in the presence of a catalytic amount of sodium methylsulfinate as an initiator under photoinduced conditions is developed.This photocatalytic reaction proceeds smoothly with good functional group tolerance under visible light irradiation.Preliminary mechanistic investigations indicate that this reaction occurs through a radical relay pathway.展开更多
基金This work was supported by the Natural Science Foundation of Shaanxi Province(Grant No.2021KW-25)the Astronautics Supporting Technology Foundation of China(Grant No.2019-HT-XG)the Fundamental Research Funds for the Central Universities(Grant No.3102018ZY015).
文摘The estimation of the disturbance input acting on a vehicle from its given responses is an inverse problem.To overcome some of the issues related to ill-posed inverse problems,this work proposes a method of reconstructing the road roughness based on the Kalman filter method.A half-car model that considers both the vehicle and equipment is established,and the joint input-state estimation method is used to identify the road profile.The capabilities of this methodology in the presence of noise are numerically demonstrated.Moreover,to reduce the influence of the driving speed on the estimation results,a method of choosing the calculation frequency is proposed.A road vibration test is conducted to benchmark the proposed method.
基金The financial support from the National Natural Science Foundation of China(No.21871053)the Leading Innovative and Entrepreneur Team Introduction Program of Zhejiang(No.2019R01005)the Open Research Fund of School of Chemistry and Chemical Engineering,Henan Normal University(2020ZD04)is gratefully acknowledged.
文摘An iron-catalyzed four-component reaction of cycloketone oxime esters,alkenes,DABCO·(SO_(2))_(2) and tri-methylsilyl azide(TMSN_(3))is described.This multicomponent radical transformation presents excellent regio-and chemoselectivity,leading to a range of β-azidosulfones in moderate to excellent yields.In this protocol,the utilization of a sulfur dioxide surrogate of DABCO·(SO_(2))_(2) as the source of the sulfonyl group enables the reaction to proceed efficiently under mild conditions without the need for strong oxidants.Additionally,the products can be transformed intoβ-aminosulfones and other valuable sulfonyl-contain-ing nitrogen heterocycles.
基金Financial support from the National Natural Science Foundation of China(No.21901178)the Natural Science Foundation of Zhejiang Province(LY21B020002)+1 种基金the Leading Innovative and Entrepreneur Team Introduction Program of Zhejiang(No.2019R01005)the Open Research Fund of School of Chemistry and Chemical Engineering,Henan Normal University(2020ZD04)is gratefully acknowledged.
文摘The generation of methylsufonyl-containing thioflavones through a radical relay reaction of methylthiolated phenylalkynones and potassium metabisulfite in the presence of a catalytic amount of sodium methylsulfinate as an initiator under photoinduced conditions is developed.This photocatalytic reaction proceeds smoothly with good functional group tolerance under visible light irradiation.Preliminary mechanistic investigations indicate that this reaction occurs through a radical relay pathway.
