In this paper,several definitions of fractional differences are discussed.Their applications to fractional maps are compared.As an example,the logistic equa
In this talk we will discuss the influence of network topology on collective properties of a dynamical system defined upon it.For this purpose,we propose a
An integrated computational fluid dynamics and computational structural dynamics approach was developed here for simulating the flutter problems efficiently
商用白光LED是由蓝光In Ga N芯片和Ce:YAG荧光粉封装在一起制成的,荧光粉混合于环氧树脂/硅胶中并涂覆于芯片上。然而由于环氧树脂/硅胶导热性和化学稳定性较差,在高功率芯片照射或者较高温度使用环境下容易发生老化、黄化,造成LED色偏进而严重缩短器件的使用寿命。另外,由于红光成分的缺乏,此类LED器件往往呈现出较高的色温和较低的显色指数。研究表明,与荧光粉相比,Ce:YAG荧光晶体呈现出更加
In this paper,we investigate the existence of solutions for a four-point nonlocal boundary value problem of nonlinear impulsive differential equations of fr