Advance Maths: Part II: Fourier Transform

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**Coursera 课程“高级数学:第二部分:傅立叶变换”内容总结** 本课程深入探讨傅立叶变换(FT)的各个方面,为学习者提供了全面的理解。 **核心内容包括:** * **傅立叶级数(Fourier Series):** * 复指数形式的傅立叶级数 * 全周期傅立叶级数 * 半周期傅立叶级数 * 函数在 (−π, π) 区间上的傅立叶级数展开(包括 f(x) = x 的例子) * 函数在 (−p, p) 区间上的傅立叶级数展开 * 傅立叶级数的指数形式 * 谐波分析(Harmonic Analysis),以及其在工程问题中的应用 * 傅立叶级数在表示复杂周期函数方面的作用,以及其与正弦和余弦函数的联系。 * **傅立叶积分(Fourier Integral):** * 傅立叶积分定理 * 傅立叶积分的等价形式 * 正弦积分和余弦积分 * 傅立叶正弦变换及其逆变换 * 傅立叶余弦变换及其逆变换 * 傅立叶积分变换对(Fourier Integral Transform Pairs) * **函数类型与性质:** * 偶函数(Even Function) * 奇函数(Odd Function) * 既非偶也非奇的函数(A Function Which is Neither Even nor Odd) * Dirichlet 条件的定义,这是傅立叶展开收敛性的重要条件。 **教学方式与实践:** * 课程在每一讲的结尾都提供了家庭作业。 * 鼓励学习者完成作业,并通过提供的答案密钥进行核对,以巩固所学知识。 * 课程中会解决大量涉及不同类型傅立叶变换的数值计算问题。 **课程目标:** 本课程旨在帮助学习者理解傅立叶变换的理论基础,掌握不同形式的傅立叶展开和变换,并能将其应用于解决工程领域中的实际问题。通过理论讲解和实例分析,培养学习者在信号处理、系统分析等方面的数学能力。

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This course covers all the details of Fourier Transform (FT) like complex exponential form of Fourier series, Fourier integral theorem, Equivalent forms of Fourier integral, Sine and Cosine integrals, Fourier sine and cosine transform and their inverse, several numericals solved on each type. I have given home assignments at the end of every lecture. Solve it and tally your answers with the given answer key. Definition, Dirichlet's conditions, Full Range Fourier Series, Half Range Fourier Series, Harmonic Analysis and Applications to Problems in Engineering. Periodic functions occur frequently in engineering problems. Such periodic functions are often complicated. Therefore, it is desirable to represent these in terms of the simple periodic functions of sine and cosine. A development of a given periodic function into a series of sines and cosines was studied by the French physicist and mathematician Joseph Fourier (1768-1830). The series of sines and cosines was named after him.Fourier Series Expansion of a Function over (−π, π), Fourier Series Expansion of f(x) = x over (−π, π), Fourier Series Expansion of a Function Over (−p, p), Fourier Series Expansion of the Function x, Exponential Form of a Fourier Series Expansion, Fourier Integral Transform Pairs, Fourier Cosine Integrals, Fourier Sine Integrals, Even Function, Odd Function, A Function Which is Neither Even nor Odd,

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