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Version: Summer 2025 SheCodes Program

Practical Projects

📝 Project 1: Academic Paper Diagram Suite​

Project Objective​

Create a complete diagram suite for an academic paper on machine learning, including research methodology flowcharts, experimental design diagrams, data analysis workflows, and result comparison charts.

1.1 Research Methodology Flowchart​

graph TB
  Start[研究问题定义] --> Literature[文献调研与分析]
  Literature --> Gap[研究空白识别]
  Gap --> Hypothesis[提出研究假设]
  
  Hypothesis --> Design[实验设计]
  Design --> Data[数据收集]
  
  Data --> Split[数据集划分]
  Split --> Train[训练集 70%]
  Split --> Valid[验证集 15%]
  Split --> Test[测试集 15%]
  
  Train --> Preprocess[数据预处理]
  Preprocess --> Feature[特征工程]
  
  Feature --> Models[模型选择]
  Models --> RF[随机森林]
  Models --> SVM[支持向量机]
  Models --> DL[深度学习]
  
  RF --> Training1[模型训练]
  SVM --> Training2[模型训练]
  DL --> Training3[模型训练]
  
  Training1 --> Validation[验证集评估]
  Training2 --> Validation
  Training3 --> Validation
  
  Validation --> Tuning[超参数调优]
  Tuning --> Best[最佳模型选择]
  Best --> Testing[测试集评估]
  
  Testing --> Analysis[结果分析]
  Analysis --> Comparison[对比分析]
  Comparison --> Conclusion[结论与讨论]
  Conclusion --> Paper[论文撰写]
  
  style Start fill:#e1f5fe
  style Paper fill:#e8f5e9
  style Best fill:#fff3e0

1.2 Experimental Design Diagram​

1.3 Data Processing Pipeline​

sequenceDiagram
  participant Raw as 原始数据
  participant Clean as 数据清洗
  participant Transform as 数据转换
  participant Feature as 特征提取
  participant Scale as 特征缩放
  participant Select as 特征选择
  participant Model as 模型输入
  
  Raw->>Clean: 缺失值处理
  Clean->>Clean: 异常值检测
  Clean->>Transform: 数据类型转换
  Transform->>Feature: 特征工程
  Feature->>Scale: 标准化/归一化
  Scale->>Select: 特征重要性分析
  Select->>Model: 最终特征集
  
  Note over Clean: 删除重复数据<br/>填充缺失值<br/>异常值处理
  Note over Feature: 多项式特征<br/>交互特征<br/>领域特征
  Note over Select: PCA<br/>互信息<br/>递归特征消除

1.4 Results Visualization​

pie title 模型性能对比（准确率）
  "随机森林" : 92.5
  "支持向量机" : 89.3
  "深度学习" : 94.7
  "集成模型" : 96.2
Project Deliverables
  1. Flowchart Collection: PDF format, 300 DPI
  2. LaTeX Source Code: Ready for direct embedding in papers
  3. SVG Vector Graphics: Support lossless scaling
  4. Documentation: Diagram usage guide

🏗️ Project 2: System Architecture Documentation​

Project Objective​

Create complete architecture documentation diagrams for a microservices e-commerce system, including system architecture diagrams, data flow diagrams, API sequence diagrams, and deployment architecture diagrams.

2.1 Overall System Architecture​

You: Generate an overall architecture diagram for the e-commerce system

Gemini: I'll create a complete e-commerce system architecture diagram:

```mermaid
graph TB
  subgraph "前端应用"
      Web[Web商城]
      Mobile[移动APP]
      Admin[管理后台]
      Merchant[商家平台]
  end
  
  subgraph "接入层"
      CDN[CDN加速]
      WAF[Web防火墙]
      LB[负载均衡]
      Gateway[API网关]
  end
  
  subgraph "微服务层"
      subgraph "核心服务"
          User[用户服务]
          Product[商品服务]
          Order[订单服务]
          Payment[支付服务]
      end
      
      subgraph "业务服务"
          Cart[购物车]
          Search[搜索服务]
          Recommend[推荐服务]
          Inventory[库存服务]
      end
      
      subgraph "支撑服务"
          Notification[通知服务]
          File[文件服务]
          Report[报表服务]
          Workflow[工作流服务]
      end
  end
  
  subgraph "中间件"
      MQ[消息队列]
      Cache[分布式缓存]
      Config[配置中心]
      Registry[服务注册]
  end
  
  subgraph "数据存储"
      MySQL[(MySQL集群)]
      MongoDB[(MongoDB)]
      Redis[(Redis集群)]
      ES[(ElasticSearch)]
  end
  
  Web --> CDN
  Mobile --> CDN
  Admin --> WAF
  Merchant --> WAF
  CDN --> LB
  WAF --> LB
  LB --> Gateway
  
  Gateway --> User
  Gateway --> Product
  Gateway --> Order
  Gateway --> Payment
  
  Order --> MQ
  Payment --> MQ
  MQ --> Inventory
  MQ --> Notification
  
  User --> MySQL
  Product --> MongoDB
  Search --> ES
  Cart --> Redis
```

2.2 Data Flow Diagram​

graph LR
  subgraph "数据采集"
      App[应用日志]
      User[用户行为]
      Trans[交易数据]
  end

  subgraph "数据处理"
      Kafka[Kafka队列]
      Flink[实时处理]
      Spark[批处理]
  end

  subgraph "数据存储"
      HDFS[HDFS存储]
      Hive[数据仓库]
      HBase[NoSQL存储]
  end

  subgraph "数据服务"
      OLAP[OLAP分析]
      API[数据API]
      Report[报表系统]
  end

  App --> Kafka
  User --> Kafka
  Trans --> Kafka

  Kafka --> Flink
  Kafka --> Spark

  Flink --> HBase
  Spark --> HDFS
  HDFS --> Hive

  HBase --> API
  Hive --> OLAP
  OLAP --> Report

2.3 Core API Sequence Diagram​

sequenceDiagram
  participant U as 用户
  participant G as API网关
  participant A as 认证服务
  participant O as 订单服务
  participant I as 库存服务
  participant P as 支付服务
  participant N as 通知服务
  
  U->>G: 提交订单请求
  G->>A: 验证Token
  A-->>G: Token有效
  
  G->>O: 创建订单
  O->>I: 检查库存
  I-->>O: 库存充足
  O->>I: 锁定库存
  I-->>O: 锁定成功
  
  O->>P: 创建支付单
  P-->>O: 支付单创建成功
  O-->>G: 订单创建成功
  G-->>U: 返回订单信息
  
  U->>G: 支付请求
  G->>P: 执行支付
  P->>P: 调用第三方支付
  P-->>G: 支付成功
  G-->>U: 支付完成
  
  P->>O: 更新订单状态
  O->>I: 扣减库存
  O->>N: 发送通知
  N-->>U: 订单确认邮件

💼 Project 3: Business Plan Diagrams​

Project Objective​

Create professional diagrams for a startup business plan, including business model canvas, market analysis charts, product roadmap, and organizational structure diagrams.

3.1 Business Model Canvas​

graph TB
  subgraph "商业模式画布"
      subgraph "基础设施"
          KP[关键合作伙伴<br/>・技术供应商<br/>・物流合作<br/>・支付平台]
          KA[关键活动<br/>・平台运营<br/>・技术开发<br/>・市场推广]
          KR[关键资源<br/>・技术团队<br/>・平台系统<br/>・用户数据]
      end
      
      subgraph "产品价值"
          VP[价值主张<br/>・一站式解决方案<br/>・优质用户体验<br/>・性价比高]
      end
      
      subgraph "客户界面"
          CR[客户关系<br/>・自助服务<br/>・社区支持<br/>・专属客服]
          CH[渠道通路<br/>・线上平台<br/>・移动应用<br/>・合作渠道]
          CS[客户细分<br/>・个人用户<br/>・中小企业<br/>・大型企业]
      end
      
      subgraph "财务状况"
          C$[成本结构<br/>・技术开发<br/>・运营成本<br/>・营销费用]
          R$[收入来源<br/>・订阅费用<br/>・交易佣金<br/>・增值服务]
      end
  end
  
  KP --> KA
  KA --> VP
  KR --> VP
  VP --> CR
  VP --> CH
  CR --> CS
  CH --> CS
  KA --> C$
  KR --> C$
  CS --> R$

3.2 Market Growth Forecast​

gantt
  title 产品发展路线图
  dateFormat YYYY-MM-DD
  axisFormat %Y-Q%q

  section 产品开发
  MVP版本           :done, mvp, 2024-01-01, 90d
  功能完善           :done, feature, after mvp, 120d
  2.0版本开发        :active, v2, 2024-07-01, 150d
  3.0版本规划        :v3, 2025-01-01, 180d

  section 市场拓展
  种子用户获取       :done, seed, 2024-02-01, 60d
  市场推广           :done, market, 2024-04-01, 90d
  规模化增长         :active, scale, 2024-07-01, 180d
  国际化             :intl, 2025-01-01, 365d

  section 融资计划
  天使轮             :done, angel, 2024-01-15, 30d
  Pre-A轮            :done, prea, 2024-06-01, 45d
  A轮                :active, arounda, 2024-11-01, 60d
  B轮                :roundb, 2025-06-01, 60d

3.3 Organizational Structure​

graph TB
  CEO[CEO<br/>首席执行官]
  
  CEO --> CTO[CTO<br/>首席技术官]
  CEO --> COO[COO<br/>首席运营官]
  CEO --> CFO[CFO<br/>首席财务官]
  CEO --> CMO[CMO<br/>首席营销官]
  
  CTO --> Dev[开发团队<br/>15人]
  CTO --> QA[测试团队<br/>5人]
  CTO --> DevOps[运维团队<br/>3人]
  
  COO --> Product[产品团队<br/>8人]
  COO --> Support[客服团队<br/>10人]
  COO --> Operations[运营团队<br/>6人]
  
  CFO --> Finance[财务部<br/>4人]
  CFO --> Legal[法务部<br/>2人]
  
  CMO --> Marketing[市场部<br/>7人]
  CMO --> Sales[销售部<br/>12人]
  CMO --> BD[商务拓展<br/>5人]
  
  style CEO fill:#e1f5fe
  style CTO fill:#fff3e0
  style COO fill:#f3e5f5
  style CFO fill:#e8f5e9
  style CMO fill:#fce4ec

🎯 Comprehensive Exercises​

Exercise Tasks​

📚 Exercise 1: Technical Documentation

Create for your open source project:

  • System architecture diagram
  • API flow diagram
  • Deployment architecture diagram
  • Data model diagram

🎓 Exercise 2: Academic Diagrams

Prepare for research paper:

  • Experimental workflow diagram
  • Algorithm flowchart
  • Data analysis diagram
  • Results comparison chart

💼 Exercise 3: Business Presentation

Create for project reporting:

  • Project timeline
  • Team structure diagram
  • Business process diagram
  • Financial analysis chart

Evaluation Criteria​

Excellent Work Standards
  • Accuracy: Information is accurate, logic is clear
  • Aesthetics: Coordinated colors, reasonable layout
  • Standards Compliance: Meets industry standards
  • Innovation: Has unique presentation format
  • Practicality: Effectively communicates information

📦 Project Template Downloads​

Downloadable Resources

  • 📄 Mermaid diagram template collection
  • 🎨 Draw.io style library
  • 📊 Academic paper diagram examples
  • 🏗️ System architecture diagram templates
  • 💼 Business diagram templates

Visit GitHub Repository to get all templates

🎉 Course Completion​

Congratulations on completing the diagram creation course! You have now mastered:

✅Mermaid code-based diagram creation
✅Draw.io professional diagram design
✅AI-assisted diagram creation techniques
✅Diagram applications in different scenarios
✅Practical project experience

Continue Learning​

Recommended learning paths:

  • Deep dive into data visualization (D3.js, ECharts)
  • Explore UML modeling tools (PlantUML, StarUML)
  • Learn infographic design
  • Master interactive charts (Plotly, Bokeh)