A new model shift mapping was given in bilateral symbol space. It is topologically conjugate with the traditional shift mapping. Similar to Smale Horseshoe, a model was constructed correspondent to the model shift map...A new model shift mapping was given in bilateral symbol space. It is topologically conjugate with the traditional shift mapping. Similar to Smale Horseshoe, a model was constructed correspondent to the model shift mapping, i.e., a class of mapping on Mbius strip was given. Its attractors' structure and dynamical behaviour were described.展开更多
An additional potential energy distribution function is introduced on the basis of previous D3Q25 model,and the equilibrium distribution function of D3Q25 is obtained by spherical function.A novel three-dimensional(3D...An additional potential energy distribution function is introduced on the basis of previous D3Q25 model,and the equilibrium distribution function of D3Q25 is obtained by spherical function.A novel three-dimensional(3D)shifted lattice model is proposed,therefore a shifted lattice model is introduced into D3Q25.Under the finite volume scheme,several typical compressible calculation examples are used to verify whether the numerical stability of the D3Q25 model can be improved by adding the shifted lattice model.The simulation results show that the numerical stability is indeed improved after adding the shifted lattice model.展开更多
The“shift system”teaching model of physical education is an emerging education model that aims to improve students’independent choice and personalized development.However,there are also some challenges in the pract...The“shift system”teaching model of physical education is an emerging education model that aims to improve students’independent choice and personalized development.However,there are also some challenges in the practical application of this model.For example,there are mental health issues for some students including difficulty in adaptation,social interaction,high psychological pressure,etc.Based on this,this article analyzes the impact of the“shift system”teaching model of physical education on students’mental health and explores the optimization path of the physical education“shift system”teaching model in order to promote students’mental health and all-round development.展开更多
The subscription economy has become a dominant influence in the current business environment,fundamentally transforming the manner in which organizations interact with customers and create income.This article examines...The subscription economy has become a dominant influence in the current business environment,fundamentally transforming the manner in which organizations interact with customers and create income.This article examines the substantial influence of the subscription economy on the worldwide economy,evaluating its effects on different industries and marketplaces.The research examines relevant literature and case studies to identify the main factors,difficulties,and possibilities related to the subscription economy.Moreover,its objective is to examine the consequences for firms,customers,and economic expansion,elucidating the possibility of continuous value generation and innovation.展开更多
A series of “H-shaped” organic dimers （azobenzene derivatives） exhibit linear absorption red shift compared with their corresponding monomers experimentally. Dipolar interaction model is not appropriate for the az...A series of “H-shaped” organic dimers （azobenzene derivatives） exhibit linear absorption red shift compared with their corresponding monomers experimentally. Dipolar interaction model is not appropriate for the azobenzene derivatives due to the small distance between two “D-π-A” chains. Energy transfer model is suggested for explanation of the absorption red shift. Two necessary conditions for energy transfer were verified. In addition, bi-exponential florescence-delay behavior of the dimer as well as Bella＇s quantum chemistry calculation shows evidence of energy transfer.展开更多
Light is an important external factor that affects human circadian rhythms.This study aimed to explore the effects of different dimensions of diurnal light exposure on the physiological circadian phase shift(CPS)of th...Light is an important external factor that affects human circadian rhythms.This study aimed to explore the effects of different dimensions of diurnal light exposure on the physiological circadian phase shift(CPS)of the human body.A strict light exposure experiment with different timing schemes(8:00-12:00,13:00-17:00,18:00-22:00),durations(4 h,8 h)and effective circadian stimulus levels(circadian stimulus:0.35,0.55)was performed in an enclosed laboratory.Fourteen participants,including seven males and seven females,with a mean age of 24.29±2.43(mean±standard deviation),participated in this experiment and experienced all six lighting schemes.The results showed that both time factor(F_(3,40)=29.079,p<0.001,the power of the sample size=0.98)and circadian stimulus levels(T_(20)=−2.415,p=0.025,the power of sample size=0.76)sig-nificantly affect the CPS.On this basis,a diurnal circadian lighting accumulation(DCLA)-CPS model was proposed in the form of the Boltzmann function,and was validated by experimental data with high correlation(R^(2)=0.9320,RSS=0.1184),which provides strong support for rationally arranging the light level at different times of the day.展开更多
Ordinary differential equation(ODE) are widely used for quantifying HIV viral dynamics.It is interesting but challenging to estimate ODE parameters from noisy data, especially when the data have some outliers. In this...Ordinary differential equation(ODE) are widely used for quantifying HIV viral dynamics.It is interesting but challenging to estimate ODE parameters from noisy data, especially when the data have some outliers. In this study, the authors use the Mean Shift Outlier Model(MSOM) to detect outliers in HIV model based on the two-step estimation of ODE. Approximate formula for shift parameter is derived. Furthermore, a score test statistic is constructed and its approximating distribution is established. The simulation results show that: 1) The boundary points have more impact on the parameter estimation relative to interior points. 2) The proposed procedure can detect the outliers effectively. The authors illustrate the proposed approach using an application example from an HIV clinical trial and find similar pattern to the simulation studies.展开更多
文摘A new model shift mapping was given in bilateral symbol space. It is topologically conjugate with the traditional shift mapping. Similar to Smale Horseshoe, a model was constructed correspondent to the model shift mapping, i.e., a class of mapping on Mbius strip was given. Its attractors' structure and dynamical behaviour were described.
基金the Youth Program of the National Natural Science Foundation of China(Grant Nos.11972272,12072246,and 12202331)the National Key Project,China(Grant No.GJXM92579)the Natural Science Basic Research Program of Shaanxi Province,China(Program No.2022JQ-028)。
文摘An additional potential energy distribution function is introduced on the basis of previous D3Q25 model,and the equilibrium distribution function of D3Q25 is obtained by spherical function.A novel three-dimensional(3D)shifted lattice model is proposed,therefore a shifted lattice model is introduced into D3Q25.Under the finite volume scheme,several typical compressible calculation examples are used to verify whether the numerical stability of the D3Q25 model can be improved by adding the shifted lattice model.The simulation results show that the numerical stability is indeed improved after adding the shifted lattice model.
文摘The“shift system”teaching model of physical education is an emerging education model that aims to improve students’independent choice and personalized development.However,there are also some challenges in the practical application of this model.For example,there are mental health issues for some students including difficulty in adaptation,social interaction,high psychological pressure,etc.Based on this,this article analyzes the impact of the“shift system”teaching model of physical education on students’mental health and explores the optimization path of the physical education“shift system”teaching model in order to promote students’mental health and all-round development.
文摘The subscription economy has become a dominant influence in the current business environment,fundamentally transforming the manner in which organizations interact with customers and create income.This article examines the substantial influence of the subscription economy on the worldwide economy,evaluating its effects on different industries and marketplaces.The research examines relevant literature and case studies to identify the main factors,difficulties,and possibilities related to the subscription economy.Moreover,its objective is to examine the consequences for firms,customers,and economic expansion,elucidating the possibility of continuous value generation and innovation.
文摘A series of “H-shaped” organic dimers （azobenzene derivatives） exhibit linear absorption red shift compared with their corresponding monomers experimentally. Dipolar interaction model is not appropriate for the azobenzene derivatives due to the small distance between two “D-π-A” chains. Energy transfer model is suggested for explanation of the absorption red shift. Two necessary conditions for energy transfer were verified. In addition, bi-exponential florescence-delay behavior of the dimer as well as Bella＇s quantum chemistry calculation shows evidence of energy transfer.
基金funded by the National Key R&D Program of China(Project No.2017YFB0403700)the Shanghai Municipal Science and Technology Major Project(Grant No.2017SHZDZX01).
文摘Light is an important external factor that affects human circadian rhythms.This study aimed to explore the effects of different dimensions of diurnal light exposure on the physiological circadian phase shift(CPS)of the human body.A strict light exposure experiment with different timing schemes(8:00-12:00,13:00-17:00,18:00-22:00),durations(4 h,8 h)and effective circadian stimulus levels(circadian stimulus:0.35,0.55)was performed in an enclosed laboratory.Fourteen participants,including seven males and seven females,with a mean age of 24.29±2.43(mean±standard deviation),participated in this experiment and experienced all six lighting schemes.The results showed that both time factor(F_(3,40)=29.079,p<0.001,the power of the sample size=0.98)and circadian stimulus levels(T_(20)=−2.415,p=0.025,the power of sample size=0.76)sig-nificantly affect the CPS.On this basis,a diurnal circadian lighting accumulation(DCLA)-CPS model was proposed in the form of the Boltzmann function,and was validated by experimental data with high correlation(R^(2)=0.9320,RSS=0.1184),which provides strong support for rationally arranging the light level at different times of the day.
基金supported by the Fundamental Research Funds for the Cental Universities under Grant No.JB140706the National Funds of China for Young Scientists under Grant Nos.11302157 and 11301409
文摘Ordinary differential equation(ODE) are widely used for quantifying HIV viral dynamics.It is interesting but challenging to estimate ODE parameters from noisy data, especially when the data have some outliers. In this study, the authors use the Mean Shift Outlier Model(MSOM) to detect outliers in HIV model based on the two-step estimation of ODE. Approximate formula for shift parameter is derived. Furthermore, a score test statistic is constructed and its approximating distribution is established. The simulation results show that: 1) The boundary points have more impact on the parameter estimation relative to interior points. 2) The proposed procedure can detect the outliers effectively. The authors illustrate the proposed approach using an application example from an HIV clinical trial and find similar pattern to the simulation studies.
