HFSS（High Frequency Structure Simulator）是一款广泛应用于电磁仿真领域的软件，尤其在微波、射频以及光学领域。TDR（Time Domain Reflectometry）是测量电缆和传输线特性的一种技术，常用于评估线缆的阻抗匹配、故障定位以及确定其电气长度。本实例将详细解释如何在HFSS中应用TDR方法来分析同轴弯头的特性。 在"Getting Started with HFSS: TDR for Coax Bend"这个实例中，我们将深入理解HFSS软件的基本操作和TDR技术的运用。我们需要打开文件`coax_bend_model.aedt`，这是HFSS的工作环境，包含了一个同轴弯头的三维模型。这个模型通常由几何结构、材料属性、边界条件和求解设置等部分组成。 HFSS的界面分为多个工作区，如设计树、模型视图、结果视图和控制面板等。设计树中包含了所有模型元素，包括几何形状、物理属性、边界条件等。在模型视图中，我们可以对同轴弯头进行3D可视化，通过旋转、缩放和平移查看模型的各个角度。 为了进行TDR分析，我们需要在HFSS中设置合适的求解器参数。这通常包括时间步长、终止时间、频率范围等。在本实例中，我们关注的是时间域响应，因此选择时间域求解器是关键。此外，还要设置合适的激励源，如脉冲源或阶跃源，以便模拟TDR信号。 接下来，我们将定义端口，这通常是同轴线的输入和输出端。端口的设置应确保它们能正确地代表实际的信号入射和反射情况。在HFSS中，可以通过绘制端口线或选择几何边界来创建端口。 完成模型设置后，我们运行求解器，让HFSS计算出TDR信号在同轴弯头中的传播和反射。求解过程可能需要一定的时间，具体取决于模型的复杂度和计算机性能。求解完成后，结果会保存在`coax_bend_model.aedtresults`文件中。 在结果分析阶段，我们可以查看TDR曲线，它展示了电压随时间的变化，揭示了信号在传输线中的反射和衰减。通过这些数据，我们可以计算出弯头的阻抗匹配情况，查找潜在的不连续性，甚至估算出弯头的物理特性，如弯头半径对信号质量的影响。 此外，`HFSS TDR For Coax Bend.pdf`可能是详细的操作指南或报告，它将提供更深入的解释，包括步骤解释、图形解读和可能遇到的问题及解决策略。这个PDF文件是理解HFSS TDR分析的重要资源，建议仔细阅读。 HFSS结合TDR技术可以帮助工程师们评估和优化传输线设备，尤其是涉及弯曲和不规则形状的部件。通过这个实例，学习者不仅可以掌握HFSS的基本操作，还能了解到TDR分析在实际工程问题中的应用。

Matlab 5G Toolbox Getting Started指导书

1.Processing是一种具有革命前瞻性的新兴计算机语言，它的概念是在电子艺术的环境下介绍程序语言，并将电子艺术的概念介绍给程序设计师。 更多介绍请百度"Processing"; 2.Processing作品请优酷"Processing"; 3."Getting Started with Processing"是讲解Processing最权威的书,由于Processing简洁的特点,该书才209页,很容易通读; 4.中文书只有一本《Processing互动编程艺术》,主要是对每种知识给出2-3个编程实例，例子都比较简单。个人觉得29元的价格有点高(已购得1本),如果能在书店找到，1-2个小时便可读完。 5.网上另有1个3M多大小的资源,是加密的,不能复制里面的文字。这个可以。

Jim Liang machine learning notes 上半部分 Jim Liang machine learning notes 上半部分

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DeltaV Digital Automation System V8.3_Getting Startedrar,DeltaV Digital Automation System V8.3_Getting Started

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With Bluetooth Low Energy (BLE), smart devices are about to become even smarter. This practical guide demonstrates how this exciting wireless technology helps developers build mobile apps that share data with external hardware, and how hardware engineers can gain easy and reliable access to mobile operating systems., This book provides a solid, high-level overview of how devices use BLE to communicate with each other. You'll learn useful low-cost tools for developing and testing BLE-enabled mobile apps and embedded firmware and get examples using various development platforms—including iOS and Android for app developers and embedded platforms for product designers and hardware engineers.

☆ 资源说明：☆ [Maker Media, Inc] Getting Started with BeagleBone (英文版) [Maker Media, Inc] Getting Started with BeagleBone Linux-Powered Electronic Projects With Python and JavaScript (E-Book) ☆ 图书概要：☆ Many people think of Linux as a computer operating system, running on users' desktops and powering servers. But Linux can also be found inside many consumer electronics devices. Whether they're the brains of a cell phone, cable box, or exercise bike, embedded Linux systems blur the distinction between computer and device. Many makers love microcontroller platforms such as Arduino, but as the complexity increases in their projects, they need more power for applications, such as computer vision. The BeagleBone is an embedded Linux board for makers. It's got built-in networking, many inputs and outputs, and a fast processor to handle demanding tasks. This book introduces you to both the original BeagleBone and the new BeagleBone Black and gets you started with projects that take advantage of the board's processing power and its ability to interface with the outside world. ☆ 出版信息：☆ [作者信息] Matt Richardson [出版机构] Maker Media, Inc [出版日期] 2013年10月18日 [图书页数] 144页 [图书语言] 英语 [图书格式] PDF 格式