The function concept is one of the central topics in school mathematics and it appears and reappears like a thread throughout high school mathematics.
函数及函数的思想是贯穿整个高中数学的一条主线，是中学数学教学的重要内容之一。函数图像的变换在教材中占有重要的地位。
Ordinary differential equation with constant coefficients transform into algebraic equations that can be used to implement the transfer function concept.
常系数的常微分方程变换为代数方程可以用于实现传递函数的概念。
Moreover, SVM can convert a nonlinear learning problem into a linear learning problem in order to reduce the algorithm complexity by using the kernel function concept.
又由于采用了核函数思想，使它将非线性问题转化为线性问题来解决，降低了算法的复杂度。
Through the investigation into the teaching of function concept, this paper has discussed a series of change and corresponding measures that new course standard brings.
本文通过对函数概念教学的研究，探讨了新课程标准带来的一系列变化及应对措施。
APOS theory relatively prevails abroad at present and it has already been widely used in many aspects, such as function concept, abstract algebra, dispersed mathematics, calculus.
目前APOS理论在国外比较盛行，已经在函数概念、抽象代数、离散数学、微积分等多方面领域得到广泛应用。
APOS theory relatively prevails abroad at present and it has already been widely used in many aspects, such as function concept, abstract algebra, dispersed mathematics, calculus.
目前APOS理论在国外比较盛行，已经在函数概念、抽象代数、离散数学、微积分等多方面领域得到广泛应用。
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