以直流电阻率法正反演功能为例剖析SimPEG库代码结构OA

Over the past three decades,geophysical forward and inversion techniques have been widely applied and remain a research hotspot for geophysicists worldwide.The open-sourcing of related code represents a significant feature of current technological development,leading to the emergence of large-scale libraries such as SimPEG.The SimPEG library has attracted considerable attention due to its capability to handle forward and inversion problems for various geophysical methods.However,its large codebase presents a steep learning curve for beginners.This paper systematically discusses the code framework and technical characteristics of the SimPEG library through a step-by-step approach,aiming to help beginners master its powerful functionality.First,a code example of forward and inversion using the DC resistivity method is introduced to provide a quick understanding of the library's basic functions.Second,the main code of the SimPEG library is summarized into two major categories and seven modules,facilitating a comprehensive grasp of its overall content.Third,the important classes involved in the forward and inversion processes and their inheritance relationships are examined in detail,revealing the library's code framework.On this basis,the core concept of"mapping"(Map)within the SimPEG library is thoroughly analyzed.Finally,the technical approaches and their roles in simplifying the handling of forward and inversion problems for multiple geophysical methods in SimPEG are discussed.By systematically analyzing the code framework of this library,this paper compensates for the deficiency of SimPEG's official documentation,which emphasizes functional usage while neglecting code structure analysis,resolves the difficulty in understanding SimPEG's abstract code,and facilitates secondary development based on this library's technology.