知识库与随笔分享https://blog.ragora2.xyz/https://blog.ragora2.xyz/blog/diffusion/cfg/https://blog.ragora2.xyz/blog/diffusion/cfg/Classifier-Free Guidance 的原理与噪声预测外推公式Fri, 21 Aug 2026 00:00:00 GMThttps://blog.ragora2.xyz/blog/diffusion/ddim/https://blog.ragora2.xyz/blog/diffusion/ddim/DDIM 确定性加速采样的原理与公式Fri, 21 Aug 2026 00:00:00 GMThttps://blog.ragora2.xyz/blog/diffusion/ddpm/https://blog.ragora2.xyz/blog/diffusion/ddpm/DDPM 的前向加噪、反向去噪和简化损失函数Fri, 21 Aug 2026 00:00:00 GMThttps://blog.ragora2.xyz/blog/diffusion/diffusion-from-scratch/https://blog.ragora2.xyz/blog/diffusion/diffusion-from-scratch/从零实现 DDPM，用代码理解每一个组件Fri, 21 Aug 2026 00:00:00 GMThttps://blog.ragora2.xyz/blog/diffusion/diffusion-loss/https://blog.ragora2.xyz/blog/diffusion/diffusion-loss/从 ELBO 到 L_simple 的完整推导过程Fri, 21 Aug 2026 00:00:00 GMThttps://blog.ragora2.xyz/blog/diffusion/diffusion-model/https://blog.ragora2.xyz/blog/diffusion/diffusion-model/扩散模型的核心思想：前向加噪与反向去噪Fri, 21 Aug 2026 00:00:00 GMThttps://blog.ragora2.xyz/blog/diffusion/diffusion-policy/https://blog.ragora2.xyz/blog/diffusion/diffusion-policy/Diffusion Policy 将扩散模型应用于机器人策略学习Fri, 21 Aug 2026 00:00:00 GMThttps://blog.ragora2.xyz/blog/diffusion/diffusion-process/https://blog.ragora2.xyz/blog/diffusion/diffusion-process/扩散模型中正向加噪过程的数学定义与闭式采样Fri, 21 Aug 2026 00:00:00 GMThttps://blog.ragora2.xyz/blog/diffusion/latent-diffusion/https://blog.ragora2.xyz/blog/diffusion/latent-diffusion/在潜在空间做扩散的原理，Stable Diffusion 的基础Fri, 21 Aug 2026 00:00:00 GMThttps://blog.ragora2.xyz/blog/diffusion/noise-prediction/https://blog.ragora2.xyz/blog/diffusion/noise-prediction/从反向过程的数学结构出发，说明扩散模型为什么训练网络预测噪声，以及这一设计如何自然地引出 DDIM、CFG 和 Latent Diffusion。Fri, 21 Aug 2026 00:00:00 GMThttps://blog.ragora2.xyz/blog/diffusion/score-sde/https://blog.ragora2.xyz/blog/diffusion/score-sde/分数匹配、Langevin 采样与 SDE 视角统一扩散模型Fri, 21 Aug 2026 00:00:00 GMThttps://blog.ragora2.xyz/blog/diffusion/vae/https://blog.ragora2.xyz/blog/diffusion/vae/VAE 的核心思想、损失函数与重参数化技巧Fri, 21 Aug 2026 00:00:00 GMThttps://blog.ragora2.xyz/blog/embodied-ai/embodied-ai-knowledge-network/https://blog.ragora2.xyz/blog/embodied-ai/embodied-ai-knowledge-network/一篇覆盖物理仿真、视频生成世界模型、VLA 策略学习的具身智能全景笔记，附论文精读路线图与工程实践Wed, 26 Aug 2026 00:00:00 GMThttps://blog.ragora2.xyz/blog/hello-world/https://blog.ragora2.xyz/blog/hello-world/这是博客的第一篇文章，用于测试排版和功能。Wed, 19 Aug 2026 00:00:00 GMThttps://blog.ragora2.xyz/blog/math-basics/cross-entropy/https://blog.ragora2.xyz/blog/math-basics/cross-entropy/交叉熵损失函数及其与熵、KL 散度的关系Fri, 21 Aug 2026 00:00:00 GMThttps://blog.ragora2.xyz/blog/math-basics/entropy/https://blog.ragora2.xyz/blog/math-basics/entropy/信息论中熵的定义与直觉Fri, 21 Aug 2026 00:00:00 GMThttps://blog.ragora2.xyz/blog/math-basics/gaussian/https://blog.ragora2.xyz/blog/math-basics/gaussian/高斯分布的定义、重参数化技巧与在扩散模型中的核心地位Fri, 21 Aug 2026 00:00:00 GMThttps://blog.ragora2.xyz/blog/math-basics/gradient/https://blog.ragora2.xyz/blog/math-basics/gradient/梯度的定义、直觉与在深度学习中的核心作用Fri, 21 Aug 2026 00:00:00 GMThttps://blog.ragora2.xyz/blog/math-basics/kl-divergence/https://blog.ragora2.xyz/blog/math-basics/kl-divergence/KL 散度的定义、不对称性与在扩散模型中的应用Fri, 21 Aug 2026 00:00:00 GMThttps://blog.ragora2.xyz/blog/math-basics/likelihood/https://blog.ragora2.xyz/blog/math-basics/likelihood/似然函数与最大似然估计的定义及其与扩散模型的联系Fri, 21 Aug 2026 00:00:00 GMThttps://blog.ragora2.xyz/blog/math-basics/markov-chain/https://blog.ragora2.xyz/blog/math-basics/markov-chain/马尔可夫链的定义、转移概率与稳态分布Fri, 21 Aug 2026 00:00:00 GMThttps://blog.ragora2.xyz/blog/%E5%90%AF%E7%A4%BA%E5%BD%95/%E4%B8%BA%E4%BB%80%E4%B9%88%E5%BC%80%E5%8F%91%E4%BA%BA%E5%91%98%E5%AE%B9%E6%98%93%E4%BD%8E%E4%BC%B0%E5%8F%AF%E7%94%A8%E6%80%A7/https://blog.ragora2.xyz/blog/%E5%90%AF%E7%A4%BA%E5%BD%95/%E4%B8%BA%E4%BB%80%E4%B9%88%E5%BC%80%E5%8F%91%E4%BA%BA%E5%91%98%E5%AE%B9%E6%98%93%E4%BD%8E%E4%BC%B0%E5%8F%AF%E7%94%A8%E6%80%A7/书里有一个很重要的观点：开发人员通常不擅长用户体验设计，因为开发人员脑子里想的是**实现模型**，而用户看重的是**概念模型**。Tue, 30 Jun 2026 00:00:00 GMThttps://blog.ragora2.xyz/blog/%E5%90%AF%E7%A4%BA%E5%BD%95/%E4%BA%A7%E5%93%81%E5%8E%9F%E5%88%99/https://blog.ragora2.xyz/blog/%E5%90%AF%E7%A4%BA%E5%BD%95/%E4%BA%A7%E5%93%81%E5%8E%9F%E5%88%99/> [!Question]Wed, 01 Jul 2026 00:00:00 GMThttps://blog.ragora2.xyz/blog/%E5%90%AF%E7%A4%BA%E5%BD%95/%E4%BB%B7%E5%80%BC%E5%8F%AF%E7%94%A8%E6%80%A7%E5%8F%AF%E8%A1%8C%E6%80%A7%E4%B8%89%E8%80%85%E7%9A%84%E5%85%B3%E7%B3%BB/https://blog.ragora2.xyz/blog/%E5%90%AF%E7%A4%BA%E5%BD%95/%E4%BB%B7%E5%80%BC%E5%8F%AF%E7%94%A8%E6%80%A7%E5%8F%AF%E8%A1%8C%E6%80%A7%E4%B8%89%E8%80%85%E7%9A%84%E5%85%B3%E7%B3%BB/|**判断**|**问题**|**失败表现**|Tue, 30 Jun 2026 00:00:00 GMThttps://blog.ragora2.xyz/blog/%E5%90%AF%E7%A4%BA%E5%BD%95/%E5%8F%AF%E7%94%A8%E6%80%A7%E7%9A%84%E6%9C%AC%E8%B4%A8/https://blog.ragora2.xyz/blog/%E5%90%AF%E7%A4%BA%E5%BD%95/%E5%8F%AF%E7%94%A8%E6%80%A7%E7%9A%84%E6%9C%AC%E8%B4%A8/用户能不能在不被解释, 不被培训, 不被强迫的情况下, 完成他想完成的任务Tue, 30 Jun 2026 00:00:00 GMThttps://blog.ragora2.xyz/blog/%E5%90%AF%E7%A4%BA%E5%BD%95/%E5%8F%AF%E8%A1%8C%E6%80%A7/https://blog.ragora2.xyz/blog/%E5%90%AF%E7%A4%BA%E5%BD%95/%E5%8F%AF%E8%A1%8C%E6%80%A7/**可行性：团队能不能把它做出来，并且稳定、可持续地交付？**Tue, 30 Jun 2026 00:00:00 GMThttps://blog.ragora2.xyz/blog/%E5%90%AF%E7%A4%BA%E5%BD%95/%E5%90%AF%E7%A4%BA%E5%BD%95%E4%BB%B7%E5%80%BC%E5%8F%AF%E7%94%A8%E6%80%A7%E5%8F%AF%E8%A1%8C%E6%80%A7/https://blog.ragora2.xyz/blog/%E5%90%AF%E7%A4%BA%E5%BD%95/%E5%90%AF%E7%A4%BA%E5%BD%95%E4%BB%B7%E5%80%BC%E5%8F%AF%E7%94%A8%E6%80%A7%E5%8F%AF%E8%A1%8C%E6%80%A7/> 这是《启示录》（Inspired, Marty Cagan）的结构化读书笔记，以「价值—可用性—可行性」三元框架为主线，把零散概念串成一篇完整的文章。Fri, 21 Aug 2026 00:00:00 GMThttps://blog.ragora2.xyz/blog/%E5%90%AF%E7%A4%BA%E5%BD%95/%E5%AE%9A%E4%B9%89%E8%A6%81%E5%BC%80%E5%8F%91%E7%9A%84%E4%BA%A7%E5%93%81/https://blog.ragora2.xyz/blog/%E5%90%AF%E7%A4%BA%E5%BD%95/%E5%AE%9A%E4%B9%89%E8%A6%81%E5%BC%80%E5%8F%91%E7%9A%84%E4%BA%A7%E5%93%81/当一个机会被认为值得探索后，产品经理才进入第二项工作：定义产品。Tue, 30 Jun 2026 00:00:00 GMThttps://blog.ragora2.xyz/blog/%E5%90%AF%E7%A4%BA%E5%BD%95/%E5%B8%82%E5%9C%BA%E8%B0%83%E7%A0%94/https://blog.ragora2.xyz/blog/%E5%90%AF%E7%A4%BA%E5%BD%95/%E5%B8%82%E5%9C%BA%E8%B0%83%E7%A0%94/> [!NOTE]Tue, 30 Jun 2026 00:00:00 GMThttps://blog.ragora2.xyz/blog/%E5%90%AF%E7%A4%BA%E5%BD%95/%E5%B9%B3%E6%BB%91%E9%83%A8%E7%BD%B2/https://blog.ragora2.xyz/blog/%E5%90%AF%E7%A4%BA%E5%BD%95/%E5%B9%B3%E6%BB%91%E9%83%A8%E7%BD%B2/> [!Tip] 避免用户方案Fri, 17 Jul 2026 00:00:00 GMThttps://blog.ragora2.xyz/blog/%E5%90%AF%E7%A4%BA%E5%BD%95/%E5%BA%95%E5%B1%82%E6%80%9D%E6%83%B3/https://blog.ragora2.xyz/blog/%E5%90%AF%E7%A4%BA%E5%BD%95/%E5%BA%95%E5%B1%82%E6%80%9D%E6%83%B3/**产品经理的核心工作不是管理需求，而是降低产品失败的风险。**Tue, 30 Jun 2026 00:00:00 GMThttps://blog.ragora2.xyz/blog/%E5%90%AF%E7%A4%BA%E5%BD%95/%E6%96%B0%E7%94%9F%E6%B5%8B%E8%AF%95/https://blog.ragora2.xyz/blog/%E5%90%AF%E7%A4%BA%E5%BD%95/%E6%96%B0%E7%94%9F%E6%B5%8B%E8%AF%95/> [!Tip]Wed, 01 Jul 2026 00:00:00 GMThttps://blog.ragora2.xyz/blog/%E5%90%AF%E7%A4%BA%E5%BD%95/%E6%B6%88%E8%B4%B9%E8%80%85%E5%88%86%E7%B1%BB/https://blog.ragora2.xyz/blog/%E5%90%AF%E7%A4%BA%E5%BD%95/%E6%B6%88%E8%B4%B9%E8%80%85%E5%88%86%E7%B1%BB/> [!Abstract]Wed, 01 Jul 2026 00:00:00 GMThttps://blog.ragora2.xyz/blog/%E6%80%9D%E8%80%83%E5%BF%AB%E4%B8%8E%E6%85%A2/%E8%AF%BB%E6%80%9D%E8%80%83%E5%BF%AB%E4%B8%8E%E6%85%A2%E5%A4%A7%E8%84%91%E9%87%8C%E4%BD%8F%E7%9D%80%E4%B8%A4%E4%B8%AA%E8%87%AA%E5%B7%B1/https://blog.ragora2.xyz/blog/%E6%80%9D%E8%80%83%E5%BF%AB%E4%B8%8E%E6%85%A2/%E8%AF%BB%E6%80%9D%E8%80%83%E5%BF%AB%E4%B8%8E%E6%85%A2%E5%A4%A7%E8%84%91%E9%87%8C%E4%BD%8F%E7%9D%80%E4%B8%A4%E4%B8%AA%E8%87%AA%E5%B7%B1/丹尼尔·卡尼曼的研究精华：系统1与系统2、认知偏差、前景理论、两个自我。认识偏差不是为了战胜它，而是为了在它发作时能认出它来。Tue, 25 Aug 2026 00:00:00 GMT