Supplement 1. Maple file for constructing conditional probability tables from signed directed graphs, SDG graphical editor program, example BBNs for the parasitoid and lake mesocosm studies, and instruction guide for SDG-BBN construction.

File List Guide.pdf -- Instruction guide for SDG-BBN construction CPT Builder.mws -- Maple file that constructs conditional probability tables SDG Graphical Editor -- InstallAnywhere Self Extractor application that allows user to draw SDG and construct the transposed signed adjacency matrix °A parasitoid.neta -- Bayes net for parasitoid example lake.neta -- Bayes net for mesocosms example Description This instruction guide Guide.pdf describes in detail the transition from a signed directed graph (SDG) to a Bayesian Belief Network (BBN). The instruction guide begins by deriving the qualitative mathematics for the host-parasitoid example. Instructions are given for drawing an SDG and the associated matrix ºA using the SDG Graphical Editor. The guide shows how to construct the conditional probabilities using the Maple file CPT Builder.mws. Example Bayes nets are included for the parasitoid example (parasitoid.neta) and the lake mesocosms example (lake.neta). These latter two files use the BBN software Netica, available at www.norsys.com.

文件列表如下：
1. File List Guide.pdf -- 用于SDG-BBN构建的操作指南
2. CPT Builder.mws -- 用于构建条件概率表（Conditional Probability Table，CPT）的Maple脚本文件
3. SDG Graphical Editor -- 基于InstallAnywhere的自解压应用程序，支持用户绘制SDG并生成转置符号邻接矩阵
4. parasitoid.neta -- 寄生者示例贝叶斯网络文件
5. lake.neta -- 湖泊中宇宙实验示例贝叶斯网络文件

本操作指南（File List Guide.pdf）详细阐述了从符号有向图（Signed Directed Graph，SDG）到贝叶斯置信网络（Bayesian Belief Network，BBN）的转换流程。指南首先针对寄主-寄生者示例推导了定性数学模型，随后提供了使用SDG图形编辑器绘制SDG及关联转置符号邻接矩阵的操作步骤，并演示了如何通过CPT Builder.mws脚本文件构建条件概率表。指南附带了寄生者示例（parasitoid.neta）与湖泊中宇宙实验示例（lake.neta）的贝叶斯网络文件，上述两个示例文件均适配可从www.norsys.com获取的BBN软件Netica。