λCogLab

「Where innovation never stops.」

Four Ways of Knowledge Representation

Knowledge representation involves representing the key concepts and relations between the decision variables in some formal manner, typically within a framework suggested by an expert systems shell...

Posted by Xiaming Chen on April 9, 2023

Note on Cognitive Architecture

Here is some take-away note about Cognitive Architecture on MIT course 6.S099: Artificial General Intelligence. Original video on YouTube. Background Cognitive architecture is a theoretical frame...

Posted by Xiaming Chen on March 22, 2023

Project LaCogito

Introduction There are many reasons and motivations for me to initiate this new project LambdaCogito (or LaCogito). The primary part is that I was frustrated by small and even-no progress of knowl...

Posted by Xiaming Chen on March 12, 2023

How JIT optimizes code

The JIT compilation consists of five stages: Inlining Inlining is the process by which the trees of smaller methods are merged, or “inlined”, into the trees of their callers. This speeds up frequ...

Posted by Xiaming Chen on March 5, 2023

我站在比特之巅，凝望着知识之渊

Staring Into The Abyss of Knowledge

题记：徘徊在数字的世界里，我有时感觉像个富有的国王，有时又像是暗夜中前行的乞者。我时而站在比特之巅，笑傲群山；时而被逼仄无路，如临深渊… 经过三十多年数字化技术的高速发展，人类积累了巨量的比特数据。如果这句话听起来那么平庸，下面的统计数据会让你有更直观的感受： 2020年人均每秒产生1.7MB数据，每天人类产生2.5EB (1EB=10^9GB) 截至2020年底，整个数字世界...

Posted by Xiaming Chen on February 12, 2022

元数据的可计算化反 III

The Computability of Metadata (Part 3)

一点有关链接数据到图模型映射的思考: Mapping from Linked-Data Model to Labeld Property Graph 仅仅是一些思考片段，省略了很多背景知识，比如关联数据、元数据、知识表示、图计算等等。不求看官解，自娱耳。有兴趣的可以探讨。 OWL/RDFS/RDF是目前为止，普遍被业界接受的一种描述性链接数据范式。其优势在于描述知识的方法灵活，科研和工业...

Posted by Xiaming Chen on August 6, 2018

CNDeepdive上手体验

Deepdive是斯坦福前几年开发的知识特征提取引擎，不过项目目前已经进入维护状态。最近由于研究项目需要，准备基于CNDeepdive对中文进行知识抽取。虽然官方最新支持到Ubuntu 16.04，而自己的系统是18.04，加之不愿折腾新系统，一个周末都在趟坑，不过尚好走通了，记录下来以飨来者。首先，CNDeepdive可以从OpenKG.cn或百度云盘下载。由于自动化安装基于d...

Posted by Xiaming Chen on March 4, 2018

元数据的可计算化反 II

The Computability of Metadata (Part 2)

题解：这个《元数据》系列本计划介绍一种有关数据的科技讯息，上篇完成后有读者反馈并非人人都懂技术，首当其冲便是这个看不懂的反人类题目。正巧元旦节期出游了趟鲁迅先生故居，从繁糜商业气息中依稀有些关于那个过往时代的见闻。细思之下，我所目标分享的，其实不是数据也不是科技本身，而是这个和数据科技息息相关的时代。而这些狄更斯多年前已经总结完了，无妨对于当下这个时代，填些骨肉，说道说道我眼中这个“失控”的...

Posted by Xiaming Chen on January 11, 2018