An engineering notebook on AI, systems, and everyday experiments.

音频碎碎念系列开篇：批判HiFi科学派（哈曼神教）的单一维度世界观，探讨音频器材评价中频率响应之外的多维度trade-off。

通过系统性调试将AM5导星误差从1.41角秒降到0.4x角秒：分享三脚架极轴偏移、平衡重锤、导星镜选择、算法参数调优等关键因素的控制变量实验方法。

Body weight is a poor metric—noisy, high latency, loose reward loop. Continuous glucose monitoring (CGM) provides real-time feedback on food and exercise, making weight management more effective and motivating.

体重指标噪音大、延时高、反馈慢。持续血糖监测仪（CGM）提供近实时反馈，直观展示食物和运动对血糖的影响，让减肥更有动力和方向。

Career advice for new software engineers: why coding speed matters less than software engineering skills like extensibility and debugging, plus tips on initiative, decision-making, and mentorship.

写码能力不是评价码农的主要标准，软件工程的扩展性、维护性、自动化和debug能力更重要，以及进取心、做决策、沟通和找mentor的职业建议。

A mathematical approach to narrowband color synthesis - using linear algebra and matrix transformation to map H/S/O channels to custom RGB colors, enabling precise control over saturation and aesthetic palettes beyond standard SHO.

用线性代数实现窄带自定义调色：选取喜欢的颜色获取RGB值，通过矩阵变换将HSO通道投影到新色彩空间，实现饱和度可控的个性化调色盘。

深空技巧应用于星野摄影：PixInsight可控拉伸、校准场去除暗角、长焦接片提升星点质量、大光圈下窄带滤镜带宽偏移问题及前置滤镜解决方案。

Deep sky techniques for wide-field astrophotography: controlled stretching in PixInsight, calibration frames for vignetting removal, telephoto mosaics for better stars, and bandwidth shift issues with narrowband filters at wide apertures.