《FDFD.jl:纯Julia实现的电磁学有限差分频域方法》 FDFD.jl是一个专门用于电磁学领域的计算软件,它基于开源编程语言Julia,实现了有限差分频域(Finite Difference Frequency Domain,简称FDFD)方法。FDFD是一种强大的数值计算技术,广泛应用于光子学、微波工程、纳米光学等领域,用于求解波动方程,分析和设计电磁结构。 我们来深入了解FDFD方法。在电磁学中,麦克斯韦方程是描述电磁场变化的基本方程。FDFD方法是将这些偏微分方程转化为离散的代数方程组,通过在空间和频率域进行离散化来逼近连续问题。这种方法的优势在于能够处理复杂几何形状和非均匀介质,同时保持较高的计算效率。在FDFD算法中,通常采用中心差分法对空间导数进行近似,而傅里叶变换则用于处理频率域的关系。 Julia语言是FDFD.jl的核心,它的设计目标是提供高性能科学计算的能力,同时保持易于使用和可读性强的代码。Julia的动态类型和Just-In-Time (JIT)编译使其在数值计算领域表现出色,可以与C、Fortran等传统科学计算语言相媲美。FDFD.jl利用Julia的这些特性,能够快速高效地执行电磁模拟任务。 在FDFD.jl项目中,`FDFD.jl-master`目录可能包含了源代码、示例、文档和测试等资源。源代码通常会包含定义网格、设置边界条件、执行傅里叶变换以及求解线性系统的函数。开发者和用户可以通过阅读和修改这些代码来定制自己的电磁模型,例如设计光波导、谐振器或者研究纳米结构的光谱特性。 FDFD方法的一个重要应用是波导分析。波导是传输电磁波的结构,如光纤通信和光子集成电路中的关键组成部分。通过FDFD,我们可以计算出波导的传播常数、模式分布以及损耗,这对于理解和优化波导性能至关重要。 此外,FDFD方法在纳米光子学中也有广泛的应用。纳米光子学研究的是尺度达到纳米级别的光与物质相互作用,这涉及到局域表面等离子体共振、光子晶体和超材料等前沿领域。FDFD可以模拟这些结构的电磁响应,预测其光学性质,为新型光子器件的设计提供理论支持。 FDFD.jl是利用Julia语言实现的电磁学计算工具,它为研究者和工程师提供了强大且灵活的平台,以解决各种电磁问题,包括但不限于光学、微波工程和纳米光子学。通过深入理解和运用这个库,我们可以更深入地探索和设计电磁系统,推动相关领域的科技进步。
2025-07-22 19:55:44 681KB julia optics electromagnetics frequency-domain
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频域方法系统辨识,非常经典的一本书 Identification is a powerful technique for building accurate models of complex systems from noisy data. It consists of three basic steps, which are interrelated: (1) the design of an experiment; (2) the construction of a model, black box or from physical laws; and (3) the estimation of the model parameters from the measurements.
2024-06-18 15:57:50 45.32MB System frequency
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Domain明小子注入工具Domain明小子注入工具Domain明小子注入工具Domain明小子注入工具
2024-05-07 22:00:56 778KB
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一类有界区域上的p(x)-Laplace Dirichlet 问题正解的多重性,解晓霞,赵培浩,本文研究在具有光滑边界的有界区域上p(x)-Laplacian Dirichlet问题正解的存在性,主要结果是此问题在适当的Sobolev空间中有两个正解,且在�
2024-03-02 09:07:28 334KB 首发论文
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weblogic12c安装指导文档,weblogic12c建域的WLST脚本,以及所需要的配置文件。
2024-01-15 10:38:30 3MB weblogic12c
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本书由世界级软件开发大师和软件开发“教父”Martin Fowler历时多年写作而成,ThoughtWorks中国翻译。全面详尽地讲解了各种DSL及其构造方式,揭示了与编程语言无关的通用原则和模式,阐释了如何通过DSL有效提高开发人员的生产力以及增进与领域专家的有效沟通,能为开发人员选择和使用DSL提供有效的决策依据和指导方法。 全书共57章,分为六个部分:第一部分介绍了什么是DSL,DSL的用途,如何实现外部DS和内部DSL,如何生成代码,语言工作台的使用方法;第二部分介绍了各种DSL,分别讲述了语义模型、符号表、语境变量、构造型生成器、宏和通知的工作原理和使用场景;第三部分分别揭示分隔符指导翻译、语法指导翻译、BNF、易于正则表达式表的词法分析器、递归下降法词法分析器、解析器组合子、解析器生成器、树的构建、嵌入式语法翻译、内嵌解释器、外加代码等;第四部分介绍了表达式生成器、函数序列、嵌套函数、方法级联、对象范围、闭包、嵌套闭包、标注、解析数操作、类符号表、文本润色、字面量扩展的工作原理和使用场景;第五部分介绍了适应性模型、决策表、依赖网络、产生式规则系统、状态机等计算模型的工作原理和使用场景;第六部分介绍了基于转换器的代码生成、模板化的生成器、嵌入助手、基于模型的代码生成、无视模型的代码生成和代沟等内容。
2024-01-10 09:47:03 6.19MB 领域特定语言 Martin Fowler
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本内斯蒂2011年新作品,主要介绍时域噪声抑制理论,值得大家下载下来详细研究
2023-08-11 16:37:56 556KB 本内斯蒂
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本内斯蒂关于语音增强的著作,值得大家下载下来仔细研究
2023-08-11 16:29:35 1.4MB 本内斯蒂
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Frequency Domain System Identification Toolbox——For Use with MATLAB
2023-04-11 19:54:10 2.81MB 频域系统识别
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Learn how to implement a DSL with Xtext and Xtend using easy-to-understand examples and best practices About This Book Leverage the latest features of Xtext and Xtend to develop a domain-specific language. Integrate Xtext with popular third party IDEs and get the best out of both worlds. Discover how to test a DSL implementation and how to customize runtime and IDE aspects of the DSL Who This Book Is For This book is targeted at programmers and developers who want to create a domain-specific language with Xtext. They should have a basic familiarity with Eclipse and its functionality. Previous experience with compiler implementation can be helpful but is not necessary since this book will explain all the development stages of a DSL. What You Will Learn Write Xtext grammar for a DSL; Use Xtend as an alternative to Java to write cleaner, easier-to-read, and more maintainable code; Build your Xtext DSLs easily with Maven/Tycho and Gradle; Write a code generator and an interpreter for a DSL; Explore the Xtext scoping mechanism for symbol resolution; Test most aspects of the DSL implementation with JUnit; Understand best practices in DSL implementations with Xtext and Xtend; Develop your Xtext DSLs using Continuous Integration mechanisms; Use an Xtext editor in a web application In Detail Xtext is an open source Eclipse framework for implementing domain-specific languages together with IDE functionalities. It lets you implement languages really quickly; most of all, it covers all aspects of a complete language infrastructure, including the parser, code generator, interpreter, and more. This book will enable you to implement Domain Specific Languages (DSL) efficiently, together with their IDE tooling, with Xtext and Xtend. Opening with brief coverage of Xtext features involved in DSL implementation, including integration in an IDE, the book will then introduce you to Xtend as this language will be used in all the examples throughout the book. You will then explore the typical programming development workflow with Xtext when we modify the grammar of the DSL. Further, the Xtend programming language (a fully-featured Java-like language tightly integrated with Java) will be introduced. We then explain the main concepts of Xtext, such as validation, code generation, and customizations of runtime and UI aspects. You will have learned how to test a DSL implemented in Xtext with JUnit and will progress to advanced concepts such as type checking and scoping. You will then integrate the typical Continuous Integration systems built in to Xtext DSLs and familiarize yourself with Xbase. By the end of the book, you will manually maintain the EMF model for an Xtext DSL and will see how an Xtext DSL can also be used in IntelliJ. Style and approach A step-by step-tutorial with illustrative examples that will let you master using Xtext and implementing DSLs with its custom language, Xtend. Table of Contents Chapter 1: Implementing a DSL Chapter 2: Creating Your First Xtext Language Chapter 3: Working with the Xtend Programming Language Chapter 4: Validation Chapter 5: Code Generation Chapter 6: Customizing Xtext Components Chapter 7: Testing Chapter 8: An Expression Language Chapter 9: Type Checking Chapter 10: Scoping Chapter 11: Continuous Integration Chapter 12: Xbase Chapter 13: Advanced Topics Chapter 14: Conclusions
2023-03-31 10:19:01 6.17MB Domain Specific Languages Xtext
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