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 常微分方程操作软件（Mathlets）Ordinary Differential Equations Manipulatives ("Mathlets") 课程中，我们会使用一系列称作“Mathlets”的特编计算机玩具或示例软件。你有时候会在堂上见到使用，每个习题集包含一个或多个使用Mathlets的习题。每一个Mathlet都有一个关联的“帮助”文件，它在新窗口打开并给用户提供指导。In the course, we will employ a series of specially written computer toys, or demonstrations, called "Mathlets." You will see them used in lecture occasionally, and each problem set will contain a problem based around one or another of them. Each Mathlet has an associated "Help" file which will open in a new window and provide user instructions. 作为d'Arbeloff交互式数学计划（d'A I M P）一部分，Mathlets开发的资助来自d'Arbeloff麻省理工学院优秀教育基金。Mathlets的设计和开发是和Hubert Hohn合作。获得授权使用。Funding for the development of the Mathlets was provided by a grant from the The d'Arbeloff Fund for Excellence in MIT Education as part of The d'Arbeloff Interactive Mathematics Project (d'A I M P). The Mathlets were designed and developed in collaboration with Hubert Hohn. Used with permission. 数学Mathlets 旋转运动Wheel矩阵向量 Matrix Vector 欧拉方法 Euler's Method 等倾角 Isoclines 傅立叶系数 Fourier Coefficients 三角恒等式 Trigonometric Id 卷积：反褶和延伸 Convolution: Flip and Drag 拍频 Beats 复数根 Complex Roots 复数指数 Complex Exponential 线性相图：指标方式 Linear Phase Portraits: Cursor Entry 线性相图：矩阵方式 Linear Phase Portraits: Matrix Entry 幅度和相位：一阶 Amplitude and Phase: 1st Order 幅度和相位：二阶 Amplitude and Phase: 2nd Order 波动 Waves 波动进阶 Advanced Waves阻尼比 Damping Ratio 极点和振动 Poles and Vibrations阻尼振动 Damped Vibration 强迫阻尼振动 Forced Damped Vibration