Using the Banach contraction mapping theory,we investigate the existence and uniqueness of asymptotical almost periodic solutions for differential equations with reflection of the argument(t)+ax(t)+bx(-t)=f(t,x(t),x(-t)),b≠0,t∈R.
利用压缩映射原理,研究了自变数镜射微分方程x(。
Under pseudo almost periodic function condition on the nonlinearity f,it is investigated that the existence of pseudo almost periodic solutions for differentional equations with reflection of the argument(t)+ax(t)+bx(-t)f(t,x(t),x(-t)),b≠0,t∈R.
在f是伪概周期函数的前提下研究自变数镜射微分方程。
By investigating the matching of "lao (老)/jiu (旧)" and nouns, the difference and similarity in syntax, semantics and pragmatics between the two synonymous forms are compared.
文章认为“老”主要表示时间延续变化性、自变性和数量性语义特征，因而能与“老”匹配的N也应具有时间可延续变化性和以自变为主的语义特征。
This paper studies the important problem to select independent variable in regression analysis theory.
本文研究了回归分析理论中的自变量选择的重要问题,利用线性回归模型自变量增减的残差平方和理论,获得了一种选择自变量的准则,该准则的分析表明,它计算简单,而且在一定的条件下具有强相合性。
The regression equation requires the independent variable to have no error.
最小二乘法是处理实验数据的常用方法,一元线性回归方程要求自变量无误差或其误差远小于因变量的误差。
The most optimized goals in teaching can be attained through finding independent variables which can cause changes in students and strengthening Chinese teaching according to actual situation.
通过寻找能引起学生自身改变的自变量 ,从教学实际出发 ,加大汉语课堂的教学力度 ,从而达到最优化的教学目的。